{"version":2,"relationshipURLBase":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html","relationshipResolution":"Resolve relative relationship URLs against relationshipURLBase; complete records and absolute URLs are in blocks.","title":"冻结读出和微调，在问不同的问题","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html","markdown":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.md","pages":[{"id":"h-i-mae-evaluation-interface","title":"MAE 的正面证据，也要说清使用接口","unit":"限制可见信息，怎样构成可验证的重建任务？","unitId":"i-masked-prediction","chapter":"I","number":1},{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","unit":"怎样判断表示支持了哪种使用方式？","unitId":"i-use-and-evaluate","chapter":"I","number":2},{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","unit":"怎样判断表示支持了哪种使用方式？","unitId":"i-use-and-evaluate","chapter":"I","number":3},{"id":"h-i-fixed-features-label-budget","title":"读 LAB01：固定表示，只改变预算与读出","unit":"怎样判断表示支持了哪种使用方式？","unitId":"i-use-and-evaluate","chapter":"I","number":4},{"id":"h-i-adaptation-can-lose","title":"读 LAB02：按预定规则，接受迁移没有获胜","unit":"怎样判断表示支持了哪种使用方式？","unitId":"i-use-and-evaluate","chapter":"I","number":5}],"aliases":[{"oldId":"explanation","targetId":"h-i-readout-versus-adaptation","operation":"split-explanation-range"},{"oldId":"b-1a1e02e439bb26a896747e6d","targetId":"b-1a1e02e439bb26a896747e6d","page":"h-i-mae-evaluation-interface","operation":"move","beforeSHA256":"8ce3eef83eb109d3b7630255be43a3fdb744e2cfc074570b15c8fd7432a1486c","afterSHA256":"8ce3eef83eb109d3b7630255be43a3fdb744e2cfc074570b15c8fd7432a1486c","reason":"Same source body in authored semantic page"},{"oldId":"b-f8fa45a28c5b981689c407e0","targetId":"b-f8fa45a28c5b981689c407e0","page":"h-i-mae-evaluation-interface","operation":"move","beforeSHA256":"8e45489df883e86d34df4691779f3cf7e9e27251094df0e7a920779e4922e03c","afterSHA256":"8e45489df883e86d34df4691779f3cf7e9e27251094df0e7a920779e4922e03c","reason":"Same source body in authored semantic page"},{"oldId":"b-a5cfd4cca3f48477fdb560f8","targetId":"b-a5cfd4cca3f48477fdb560f8","page":"h-i-mae-evaluation-interface","operation":"move","beforeSHA256":"f2f725904b17bcd54b2673d5a68bc81103ae385a1e35a3653c410868e548ec52","afterSHA256":"f2f725904b17bcd54b2673d5a68bc81103ae385a1e35a3653c410868e548ec52","reason":"Same source body in authored semantic page"},{"oldId":"b-818a1334a67672f2062e30bd","targetId":"b-818a1334a67672f2062e30bd","page":"h-i-mae-evaluation-interface","operation":"move","beforeSHA256":"857539d92a95c906eb9fcd172edca91e7dce5831d1fd66022c510cf90947bf93","afterSHA256":"857539d92a95c906eb9fcd172edca91e7dce5831d1fd66022c510cf90947bf93","reason":"Same source body in authored semantic page"},{"oldId":"b-d9930c09a07abaab929f1494","targetId":"b-d9930c09a07abaab929f1494","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"d71cf15e707c8a3674b4c90a599efee783cb84da5b8c8236a1d01c3add7b4958","afterSHA256":"d71cf15e707c8a3674b4c90a599efee783cb84da5b8c8236a1d01c3add7b4958","reason":"Same source body in authored semantic page"},{"oldId":"b-a1529dd6255826b61bab9666","targetId":"b-a1529dd6255826b61bab9666","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"9ba3452385c6c318c31e92e2b24f8183a28b787b2834523e8879d9aa1c40f92b","afterSHA256":"9ba3452385c6c318c31e92e2b24f8183a28b787b2834523e8879d9aa1c40f92b","reason":"Same source body in authored semantic page"},{"oldId":"b-0b0c535f1f20707ac14181c6","targetId":"b-0b0c535f1f20707ac14181c6","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"54cbe5d9c97cc6c6bacf77ce81460d0720d81671f6d484205fd796b01b0b0bbd","afterSHA256":"54cbe5d9c97cc6c6bacf77ce81460d0720d81671f6d484205fd796b01b0b0bbd","reason":"Same source body in authored semantic page"},{"oldId":"b-5e7c8be69c35c9b264341ce6","targetId":"b-5e7c8be69c35c9b264341ce6","page":"h-i-readout-versus-adaptation","operation":"rewrite","beforeSHA256":"b0db1709f00471f0a819acc1c1a2b7c18f84598fe021ecc3e6f55b93e653290b","afterSHA256":"7b3f8e9f315938ac73c65c06da35efd039508c585d5fb1854539710a7595bc28","reason":"Same source identity with figure semantics or reading context enriched"},{"oldId":"b-72169191cd0053e0eb09bfc6","targetId":"b-72169191cd0053e0eb09bfc6","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"786ce10a6b32a492259a3dccd0a54e61cd41d28a34382fb7b5386c5f03b7ad69","afterSHA256":"786ce10a6b32a492259a3dccd0a54e61cd41d28a34382fb7b5386c5f03b7ad69","reason":"Same source body in authored semantic page"},{"oldId":"b-061d8af89efbd07a1921061d","targetId":"b-061d8af89efbd07a1921061d","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"89c1acaa891d2ff2e2c771c43fb3d8c03a86f7d15a27acb66c69db244f021493","afterSHA256":"89c1acaa891d2ff2e2c771c43fb3d8c03a86f7d15a27acb66c69db244f021493","reason":"Same source body in authored semantic page"},{"oldId":"b-c4e8f05300cad375cd127ca5","targetId":"b-c4e8f05300cad375cd127ca5","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"c83215e8e774105c969d83883218bbff01e4b69ffdff8ff5bbab0e63db2d1d7a","afterSHA256":"c83215e8e774105c969d83883218bbff01e4b69ffdff8ff5bbab0e63db2d1d7a","reason":"Same source body in authored semantic page"},{"oldId":"b-b4db9434aa5e74281bf27e9f","targetId":"b-b4db9434aa5e74281bf27e9f","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"4acaebce971b6ea0d4b4101354b8427376bb30d9ed88c0ef19d5ab243972411d","afterSHA256":"4acaebce971b6ea0d4b4101354b8427376bb30d9ed88c0ef19d5ab243972411d","reason":"Same source body in authored semantic page"},{"oldId":"b-8c32103ed2f66f6c84278cc8","targetId":"b-8c32103ed2f66f6c84278cc8","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"ad68639e870f873dabd5bb51b94caf66ea41705a05f7587ef204fe83a589e25e","afterSHA256":"ad68639e870f873dabd5bb51b94caf66ea41705a05f7587ef204fe83a589e25e","reason":"Same source body in authored semantic page"},{"oldId":"b-b4943a7fba939000a71e8c63","targetId":"b-b4943a7fba939000a71e8c63","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"865d09ceca4372f3726a049746e16f3e02eaa37161581388c6ad30162ecbd365","afterSHA256":"865d09ceca4372f3726a049746e16f3e02eaa37161581388c6ad30162ecbd365","reason":"Same source body in authored semantic page"},{"oldId":"b-7055aee8142caa63a773cbe6","targetId":"b-7055aee8142caa63a773cbe6","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"cdcb7fb43f8e3b68aeaa17f2e922263995fbb26ca87e01e316776bdf6bb254de","afterSHA256":"cdcb7fb43f8e3b68aeaa17f2e922263995fbb26ca87e01e316776bdf6bb254de","reason":"Same source body in authored semantic page"},{"oldId":"b-992509b8a511430a9524703a","targetId":"b-992509b8a511430a9524703a","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"254f49d7eee80ed03f8e9230dfbc32e47cc5af9c7aa307d29df7a4f523d48ede","afterSHA256":"254f49d7eee80ed03f8e9230dfbc32e47cc5af9c7aa307d29df7a4f523d48ede","reason":"Same source body in authored semantic page"},{"oldId":"b-12e6e4b6d665814771cb87ef","targetId":"b-12e6e4b6d665814771cb87ef","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"6634f90d132f277ea605ed3c2315d1a3b7fc64223c9c62baaf35e899c95ccf4c","afterSHA256":"6634f90d132f277ea605ed3c2315d1a3b7fc64223c9c62baaf35e899c95ccf4c","reason":"Same source body in authored semantic page"},{"oldId":"b-9533fc070c6152720de27478","targetId":"b-9533fc070c6152720de27478","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"4faf37dc5a7f3cb6872a337a45222fe7c0a9dd5f95572c7928652c4dfc1155d1","afterSHA256":"4faf37dc5a7f3cb6872a337a45222fe7c0a9dd5f95572c7928652c4dfc1155d1","reason":"Same source body in authored semantic page"},{"oldId":"b-98b8dd3cd1b9c74297c83cd2","targetId":"b-98b8dd3cd1b9c74297c83cd2","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"c91f3a694a858984489c29e2d95d1f78baaa1f442aeb97dae87de4df1d6d4d5b","afterSHA256":"c91f3a694a858984489c29e2d95d1f78baaa1f442aeb97dae87de4df1d6d4d5b","reason":"Same source body in authored semantic page"},{"oldId":"b-cca604978b6d06351ac0f390","targetId":"b-cca604978b6d06351ac0f390","page":"h-i-readout-versus-adaptation","operation":"move","beforeSHA256":"eff8a37ac6432b14cfc2e0a11ae16350e2c601167cc2621a0308e3bd7c9509fb","afterSHA256":"eff8a37ac6432b14cfc2e0a11ae16350e2c601167cc2621a0308e3bd7c9509fb","reason":"Same source body in authored semantic page"},{"oldId":"b-ca664a22be2ba8570dc0427b","targetId":"b-ca664a22be2ba8570dc0427b","page":"h-i-information-versus-readable-form","operation":"move","beforeSHA256":"83cc6f4d6b2ea75dac9fe5d48f48634dd74d3a016f252179c316c9d06d58a1e5","afterSHA256":"83cc6f4d6b2ea75dac9fe5d48f48634dd74d3a016f252179c316c9d06d58a1e5","reason":"Same source body in authored semantic page"},{"oldId":"b-af0af264a5be272ec4b02556","targetId":"b-af0af264a5be272ec4b02556","page":"h-i-information-versus-readable-form","operation":"move","beforeSHA256":"1930bf83877756adf75cfa5c58cf95b5772cfcc1326d7d8f2020e866564690ec","afterSHA256":"1930bf83877756adf75cfa5c58cf95b5772cfcc1326d7d8f2020e866564690ec","reason":"Same source body in authored semantic page"},{"oldId":"b-17243d5fbf5b1244fa7b5e6c","targetId":"b-17243d5fbf5b1244fa7b5e6c","page":"h-i-information-versus-readable-form","operation":"move","beforeSHA256":"f093509431a84fb2c610445f3d3b5a82309f84203f3e3f14bf27b4437d970aca","afterSHA256":"f093509431a84fb2c610445f3d3b5a82309f84203f3e3f14bf27b4437d970aca","reason":"Same source body in authored semantic page"},{"oldId":"b-91ba6214cedc99d82a1f3fdf","targetId":"b-91ba6214cedc99d82a1f3fdf","page":"h-i-information-versus-readable-form","operation":"move","beforeSHA256":"2d5f76b8d3cfb8ced744aa188d5afb1f00466080dc571f23058e7525f9352c9b","afterSHA256":"2d5f76b8d3cfb8ced744aa188d5afb1f00466080dc571f23058e7525f9352c9b","reason":"Same source body in authored semantic page"},{"oldId":"b-a76e6931228585e897ed5ebf","targetId":"b-a76e6931228585e897ed5ebf","page":"h-i-information-versus-readable-form","operation":"rewrite","beforeSHA256":"608176a9b9d7557731f51c3aa7db4beb980f14c92aaa29b76f07f464a1d1ff74","afterSHA256":"7a3f933836db009062ad428f8b1c642b784d261baa91295c6194613a3ef1a5c7","reason":"Same source identity with figure semantics or reading context enriched"},{"oldId":"b-b9b907bc44eeabe93be5fadf","targetId":"b-b9b907bc44eeabe93be5fadf","page":"h-i-information-versus-readable-form","operation":"move","beforeSHA256":"6969640774b1a963aa2e847f536e3a2a63f0fbb869ddbd910db1346595ececb6","afterSHA256":"6969640774b1a963aa2e847f536e3a2a63f0fbb869ddbd910db1346595ececb6","reason":"Same source body in authored semantic page"},{"oldId":"b-2b78c15de9c901690f50c146","targetId":"b-2b78c15de9c901690f50c146","page":"h-i-information-versus-readable-form","operation":"move","beforeSHA256":"08efab5c92c447160954bde9f10fb7f29f121d6da81ebdb56aefe509a904a0d9","afterSHA256":"08efab5c92c447160954bde9f10fb7f29f121d6da81ebdb56aefe509a904a0d9","reason":"Same source body in authored semantic page"},{"oldId":"b-55439e5b70be533cdd41e4c9","targetId":"b-55439e5b70be533cdd41e4c9","page":"h-i-information-versus-readable-form","operation":"move","beforeSHA256":"523fca1832f0469186861e7749b91b19e43077ad0e2c93553f13d3d93d479f13","afterSHA256":"523fca1832f0469186861e7749b91b19e43077ad0e2c93553f13d3d93d479f13","reason":"Same source body in authored semantic page"},{"oldId":"b-159b5a996ae300358676f293","targetId":"b-159b5a996ae300358676f293","page":"h-i-information-versus-readable-form","operation":"move","beforeSHA256":"40f207c687aab5b36977d373a6f71935931c393ce223e5f1bb4f25bed0024cec","afterSHA256":"40f207c687aab5b36977d373a6f71935931c393ce223e5f1bb4f25bed0024cec","reason":"Same source body in authored semantic page"},{"oldId":"b-3d142dbbfa2038323aed045b","targetId":"b-3d142dbbfa2038323aed045b","page":"h-i-information-versus-readable-form","operation":"move","beforeSHA256":"e86db534f92e00b836265db0419627bfb8467b057532ab8d62710e84a0c1240a","afterSHA256":"e86db534f92e00b836265db0419627bfb8467b057532ab8d62710e84a0c1240a","reason":"Same source body in authored semantic page"},{"oldId":"b-06954fd4d0092f9b923fe2e1","targetId":"b-06954fd4d0092f9b923fe2e1","page":"h-i-fixed-features-label-budget","operation":"move","beforeSHA256":"bb79b4ac4a6cf6362f66fa05737d66ba3e64490142c050c425af0a7f198b6a8b","afterSHA256":"bb79b4ac4a6cf6362f66fa05737d66ba3e64490142c050c425af0a7f198b6a8b","reason":"Same source body in authored semantic page"},{"oldId":"b-1366c5a935817eadaa7a3763","targetId":"b-1366c5a935817eadaa7a3763","page":"h-i-fixed-features-label-budget","operation":"move","beforeSHA256":"a1e8649573c010293d8b99009a59442b5eb9c434705fdc3b4215f2627fae31be","afterSHA256":"a1e8649573c010293d8b99009a59442b5eb9c434705fdc3b4215f2627fae31be","reason":"Same source body in authored semantic page"},{"oldId":"b-593b140d7f3d955b627d1096","targetId":"b-593b140d7f3d955b627d1096","page":"h-i-fixed-features-label-budget","operation":"move","beforeSHA256":"98840bf437de632f505935090056c5d148d5693b8b7862561f53aa550909a0e6","afterSHA256":"98840bf437de632f505935090056c5d148d5693b8b7862561f53aa550909a0e6","reason":"Same source body in authored semantic page"},{"oldId":"b-8be4e18c13e70ac3c6c16dda","targetId":"b-8be4e18c13e70ac3c6c16dda","page":"h-i-fixed-features-label-budget","operation":"move","beforeSHA256":"35a5b153d095750e956842e837b63f78ebffc6b70ac5e9283ce94e3a771ccf17","afterSHA256":"35a5b153d095750e956842e837b63f78ebffc6b70ac5e9283ce94e3a771ccf17","reason":"Same source body in authored semantic page"},{"oldId":"b-cd14cbd7c2b83b54739fb2aa","targetId":"b-cd14cbd7c2b83b54739fb2aa","page":"h-i-adaptation-can-lose","operation":"move","beforeSHA256":"de37320369532b6670ed89017c0faef7d77284e9b25f9b3f2096d357574b7ad5","afterSHA256":"de37320369532b6670ed89017c0faef7d77284e9b25f9b3f2096d357574b7ad5","reason":"Same source body in authored semantic page"},{"oldId":"b-4f0253438127d91b552927b4","targetId":"b-4f0253438127d91b552927b4","page":"h-i-adaptation-can-lose","operation":"move","beforeSHA256":"1e251273badfddc47ff49a7a7de205d5a67f0ac0a8a7f192997585fd22737dc4","afterSHA256":"1e251273badfddc47ff49a7a7de205d5a67f0ac0a8a7f192997585fd22737dc4","reason":"Same source body in authored semantic page"},{"oldId":"b-2caf8aab603b552f8df55f5a","targetId":"b-2caf8aab603b552f8df55f5a","page":"h-i-adaptation-can-lose","operation":"move","beforeSHA256":"a5879223894e532f5d6752f8496bc1e65b69436ef72aa56362e3642249ec484b","afterSHA256":"a5879223894e532f5d6752f8496bc1e65b69436ef72aa56362e3642249ec484b","reason":"Same source body in authored semantic page"},{"oldId":"b-54ebc0d74e8bf16f92911c7b","targetId":"b-54ebc0d74e8bf16f92911c7b","page":"h-i-adaptation-can-lose","operation":"move","beforeSHA256":"393e153deb58af24c40e05420246665f58a55a9640a04cc5792c49c49ada9f90","afterSHA256":"393e153deb58af24c40e05420246665f58a55a9640a04cc5792c49c49ada9f90","reason":"Same source body in authored semantic page"},{"oldId":"b-5bf9e33ebfa002cdc0917340","targetId":"b-5bf9e33ebfa002cdc0917340","page":"h-i-adaptation-can-lose","operation":"move","beforeSHA256":"cf44fcc62782fb4f6bdc42c16c5187d57556a03cb7ce6065e7bd9c36d8e7d733","afterSHA256":"cf44fcc62782fb4f6bdc42c16c5187d57556a03cb7ce6065e7bd9c36d8e7d733","reason":"Same source body in authored semantic page"},{"oldId":"b-f914bc8ab6547bb3c0d49d82","targetId":"b-f914bc8ab6547bb3c0d49d82","page":"h-i-adaptation-can-lose","operation":"move","beforeSHA256":"0b7e2e05fe23f6994babd8e690eb3c977059e284334f8d8fff1dd3a50ea03e75","afterSHA256":"0b7e2e05fe23f6994babd8e690eb3c977059e284334f8d8fff1dd3a50ea03e75","reason":"Same source body in authored semantic page"},{"oldId":"h-i-mae-evaluation-interface-title","targetId":"b-6ac2a3d72d9348c6ceaac1a8","operation":"retain-source-identity"},{"oldId":"h-i-mae-evaluation-interface-bridge","targetId":"b-6e8852a584b173fc92c14d46","operation":"retain-source-identity"},{"oldId":"h-i-readout-versus-adaptation-title","targetId":"b-5e7b7de8d03bf9673a89df17","operation":"retain-source-identity"},{"oldId":"h-i-information-versus-readable-form-title","targetId":"b-4f4e0fc9426e6ee5e8112eb0","operation":"retain-source-identity"},{"oldId":"h-i-information-versus-readable-form-bridge","targetId":"b-276d0ff3a1aedf2bac257dd6","operation":"retain-source-identity"},{"oldId":"h-i-fixed-features-label-budget-title","targetId":"b-139c9af4cafd967471704467","operation":"retain-source-identity"},{"oldId":"h-i-fixed-features-label-budget-bridge","targetId":"b-108625889a2127e320f7573f","operation":"retain-source-identity"},{"oldId":"h-i-adaptation-can-lose-title","targetId":"b-41ae3bfa6f07a13ae06ca27c","operation":"retain-source-identity"},{"oldId":"h-i-adaptation-can-lose-bridge","targetId":"b-c59621eec30528ae7290c040","operation":"retain-source-identity"}],"blocks":[{"id":"b-6ac2a3d72d9348c6ceaac1a8","type":"h2","scope":"h-i-mae-evaluation-interface","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-6ac2a3d72d9348c6ceaac1a8","content":"## MAE 的正面证据，也要说清使用接口","sha256":"b3d28a0a4c169ff30e4c538ad8d1abe3726bb57eb6816619db5403228d933780","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-masked-prediction","title":"限制可见信息，怎样构成可验证的重建任务？"},"page":{"id":"h-i-mae-evaluation-interface","title":"MAE 的正面证据，也要说清使用接口","number":1},"sectionTitle":"MAE 的正面证据，也要说清使用接口","currentQuestion":"限制可见信息，怎样构成可验证的重建任务？","sourceSlides":["l3-r2-p22","l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":null,"nextBlock":"b-6e8852a584b173fc92c14d46","prerequisites":[{"id":"b-6e8852a584b173fc92c14d46","url":"#b-6e8852a584b173fc92c14d46","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-6e8852a584b173fc92c14d46","type":"p","scope":"h-i-mae-evaluation-interface","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-6e8852a584b173fc92c14d46","content":"原论文的端到端微调、最后块微调和线性读出，允许改变的计算不同。","sha256":"c836161bd0888336e9a315b4c08bfe5b94eb6d654ef0c20ca4af1d55df44fea0","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-masked-prediction","title":"限制可见信息，怎样构成可验证的重建任务？"},"page":{"id":"h-i-mae-evaluation-interface","title":"MAE 的正面证据，也要说清使用接口","number":1},"sectionTitle":"MAE 的正面证据，也要说清使用接口","currentQuestion":"限制可见信息，怎样构成可验证的重建任务？","sourceSlides":["l3-r2-p22","l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-6ac2a3d72d9348c6ceaac1a8","nextBlock":"b-1a1e02e439bb26a896747e6d","prerequisites":[{"id":"b-6ac2a3d72d9348c6ceaac1a8","url":"#b-6ac2a3d72d9348c6ceaac1a8","role":"section-title"}],"relatedBlocks":[]},{"id":"b-1a1e02e439bb26a896747e6d","type":"h3","scope":"mae-finetuning-evidence","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-1a1e02e439bb26a896747e6d","content":"### MAE 的正面证据也依赖评价接口","sha256":"8ce3eef83eb109d3b7630255be43a3fdb744e2cfc074570b15c8fd7432a1486c","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-masked-prediction","title":"限制可见信息，怎样构成可验证的重建任务？"},"page":{"id":"h-i-mae-evaluation-interface","title":"MAE 的正面证据，也要说清使用接口","number":1},"sectionTitle":"MAE 的正面证据也依赖评价接口","currentQuestion":"限制可见信息，怎样构成可验证的重建任务？","sourceSlides":["l3-r2-p22","l3-r2-p23"],"knowledgeBlock":"mae-finetuning-evidence","formulas":[],"previousBlock":"b-6e8852a584b173fc92c14d46","nextBlock":"b-f8fa45a28c5b981689c407e0","prerequisites":[{"id":"b-6ac2a3d72d9348c6ceaac1a8","url":"#b-6ac2a3d72d9348c6ceaac1a8","role":"section-title"},{"id":"b-6e8852a584b173fc92c14d46","url":"#b-6e8852a584b173fc92c14d46","role":"problem-context"}],"relatedBlocks":[{"id":"b-f8fa45a28c5b981689c407e0","url":"#b-f8fa45a28c5b981689c407e0","relation":"same-reasoning"},{"id":"b-a5cfd4cca3f48477fdb560f8","url":"#b-a5cfd4cca3f48477fdb560f8","relation":"same-reasoning"},{"id":"b-818a1334a67672f2062e30bd","url":"#b-818a1334a67672f2062e30bd","relation":"same-reasoning"}]},{"id":"b-f8fa45a28c5b981689c407e0","type":"p","scope":"mae-finetuning-evidence","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-f8fa45a28c5b981689c407e0","content":"MAE论文Table 3使用ImageNet-1K图像作自监督预训练，再端到端微调分类。ViT-L/16在224输入的top-1为85.9%；同表从零训练实现为82.6%。这里的结果支持：遮挡像素目标可以为较大视觉模型提供有效起点。它不是只看重建图好不好看。","sha256":"8e45489df883e86d34df4691779f3cf7e9e27251094df0e7a920779e4922e03c","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-masked-prediction","title":"限制可见信息，怎样构成可验证的重建任务？"},"page":{"id":"h-i-mae-evaluation-interface","title":"MAE 的正面证据，也要说清使用接口","number":1},"sectionTitle":"MAE 的正面证据也依赖评价接口","currentQuestion":"限制可见信息，怎样构成可验证的重建任务？","sourceSlides":["l3-r2-p22","l3-r2-p23"],"knowledgeBlock":"mae-finetuning-evidence","formulas":[],"previousBlock":"b-1a1e02e439bb26a896747e6d","nextBlock":"b-a5cfd4cca3f48477fdb560f8","prerequisites":[{"id":"b-1a1e02e439bb26a896747e6d","url":"#b-1a1e02e439bb26a896747e6d","role":"section-title"},{"id":"b-6e8852a584b173fc92c14d46","url":"#b-6e8852a584b173fc92c14d46","role":"problem-context"}],"relatedBlocks":[{"id":"b-1a1e02e439bb26a896747e6d","url":"#b-1a1e02e439bb26a896747e6d","relation":"same-reasoning"},{"id":"b-a5cfd4cca3f48477fdb560f8","url":"#b-a5cfd4cca3f48477fdb560f8","relation":"same-reasoning"},{"id":"b-818a1334a67672f2062e30bd","url":"#b-818a1334a67672f2062e30bd","relation":"same-reasoning"}]},{"id":"b-a5cfd4cca3f48477fdb560f8","type":"p","scope":"mae-finetuning-evidence","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-a5cfd4cca3f48477fdb560f8","content":"论文Figure 9进一步指出，同一ViT-L表示的线性读出为73.5%，只微调最后一个块即可到81.0%。因此线性读出低，并不自动意味着这份表示不适合适配；评价允许改变多少计算，会影响判断。","sha256":"f2f725904b17bcd54b2673d5a68bc81103ae385a1e35a3653c410868e548ec52","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-masked-prediction","title":"限制可见信息，怎样构成可验证的重建任务？"},"page":{"id":"h-i-mae-evaluation-interface","title":"MAE 的正面证据，也要说清使用接口","number":1},"sectionTitle":"MAE 的正面证据也依赖评价接口","currentQuestion":"限制可见信息，怎样构成可验证的重建任务？","sourceSlides":["l3-r2-p22","l3-r2-p23"],"knowledgeBlock":"mae-finetuning-evidence","formulas":[],"previousBlock":"b-f8fa45a28c5b981689c407e0","nextBlock":"b-818a1334a67672f2062e30bd","prerequisites":[{"id":"b-1a1e02e439bb26a896747e6d","url":"#b-1a1e02e439bb26a896747e6d","role":"section-title"},{"id":"b-6e8852a584b173fc92c14d46","url":"#b-6e8852a584b173fc92c14d46","role":"problem-context"}],"relatedBlocks":[{"id":"b-1a1e02e439bb26a896747e6d","url":"#b-1a1e02e439bb26a896747e6d","relation":"same-reasoning"},{"id":"b-f8fa45a28c5b981689c407e0","url":"#b-f8fa45a28c5b981689c407e0","relation":"same-reasoning"},{"id":"b-818a1334a67672f2062e30bd","url":"#b-818a1334a67672f2062e30bd","relation":"same-reasoning"}]},{"id":"b-818a1334a67672f2062e30bd","type":"p","scope":"mae-finetuning-evidence","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-818a1334a67672f2062e30bd","content":"这些是论文在明确训练与评价条件下的结果，不是本课程LAB 08的数字。阅读时区分三层：MAE原论文、当前教学卷积模型、页面里的16块索引图。它们分别提供研究实证、可运行学习链和透明机制。","sha256":"857539d92a95c906eb9fcd172edca91e7dce5831d1fd66022c510cf90947bf93","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-masked-prediction","title":"限制可见信息，怎样构成可验证的重建任务？"},"page":{"id":"h-i-mae-evaluation-interface","title":"MAE 的正面证据，也要说清使用接口","number":1},"sectionTitle":"MAE 的正面证据也依赖评价接口","currentQuestion":"限制可见信息，怎样构成可验证的重建任务？","sourceSlides":["l3-r2-p22","l3-r2-p23"],"knowledgeBlock":"mae-finetuning-evidence","formulas":[],"previousBlock":"b-a5cfd4cca3f48477fdb560f8","nextBlock":null,"prerequisites":[{"id":"b-1a1e02e439bb26a896747e6d","url":"#b-1a1e02e439bb26a896747e6d","role":"section-title"},{"id":"b-6e8852a584b173fc92c14d46","url":"#b-6e8852a584b173fc92c14d46","role":"problem-context"}],"relatedBlocks":[{"id":"b-1a1e02e439bb26a896747e6d","url":"#b-1a1e02e439bb26a896747e6d","relation":"same-reasoning"},{"id":"b-f8fa45a28c5b981689c407e0","url":"#b-f8fa45a28c5b981689c407e0","relation":"same-reasoning"},{"id":"b-a5cfd4cca3f48477fdb560f8","url":"#b-a5cfd4cca3f48477fdb560f8","relation":"same-reasoning"}]},{"id":"b-5e7b7de8d03bf9673a89df17","type":"h2","scope":"h-i-readout-versus-adaptation","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-5e7b7de8d03bf9673a89df17","content":"## 先说明允许哪些参数改变，再比较结果","sha256":"4645bf44da08679eb449acf34a82eb9613e8bd983cfd116ff38e2a2df7eb9db0","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":null,"nextBlock":"b-d9930c09a07abaab929f1494","prerequisites":[{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-d9930c09a07abaab929f1494","type":"h2","scope":"explanation","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-d9930c09a07abaab929f1494","content":"## 解释、算例与证据","sha256":"d71cf15e707c8a3674b4c90a599efee783cb84da5b8c8236a1d01c3add7b4958","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-5e7b7de8d03bf9673a89df17","nextBlock":"b-a1529dd6255826b61bab9666","prerequisites":[{"id":"b-5e7b7de8d03bf9673a89df17","url":"#b-5e7b7de8d03bf9673a89df17","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-a1529dd6255826b61bab9666","type":"h1","scope":"document","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-a1529dd6255826b61bab9666","content":"# P23 · 冻结读出和微调，在问不同的问题","sha256":"9ba3452385c6c318c31e92e2b24f8183a28b787b2834523e8879d9aa1c40f92b","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-d9930c09a07abaab929f1494","nextBlock":"b-0b0c535f1f20707ac14181c6","prerequisites":[{"id":"b-d9930c09a07abaab929f1494","url":"#b-d9930c09a07abaab929f1494","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-0b0c535f1f20707ac14181c6","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-0b0c535f1f20707ac14181c6","content":"把第一部分的方法转为使用与评价：冻结读出问现成表示，微调问适配起点，二者应各有协议。","sha256":"54cbe5d9c97cc6c6bacf77ce81460d0720d81671f6d484205fd796b01b0b0bbd","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-a1529dd6255826b61bab9666","nextBlock":"b-5e7c8be69c35c9b264341ce6","prerequisites":[{"id":"b-a1529dd6255826b61bab9666","url":"#b-a1529dd6255826b61bab9666","role":"section-title"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-5e7c8be69c35c9b264341ce6","type":"figure","scope":"document","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-5e7c8be69c35c9b264341ce6","content":"图内标签与数值：P23 学习表示机制图，状态 1；线性读出；编码器 · 冻结；线性头 · 可训练；现有特征能否读出？；微调适配；编码器 · 可训练；任务头 · 可训练；适配后能到哪里？；空间迁移；空间特征 · 按协议；检测 / 分割头；位置与边界可用吗？；共同写明：新数据切分 · 标签预算 · 训练参数范围 · 任务指标\n\n冻结编码器的线性读出、可训练编码器的微调和空间任务三种协议，训练范围与数据条件并列。\n\n- 线性读出\n- 编码器 · 冻结\n- 线性头 · 可训练\n- 现有特征能否读出？\n- 微调适配\n- 编码器 · 可训练\n- 任务头 · 可训练\n- 适配后能到哪里？\n- 空间迁移\n- 空间特征 · 按协议\n- 检测 / 分割头\n- 位置与边界可用吗？\n- 共同写明：新数据切分 · 标签预算 · 训练参数范围 · 任务指标冻结编码器的线性读出、可训练编码器的微调和空间任务三种协议，训练范围与数据条件并列。 [查看对应图解状态](/#/l3-r2-p23/0)[查看完整图解](/course/figures/l3-r2-p23-0.html)","sha256":"7b3f8e9f315938ac73c65c06da35efd039508c585d5fb1854539710a7595bc28","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"figure":{"caption":"冻结编码器的线性读出、可训练编码器的微调和空间任务三种协议，训练范围与数据条件并列。 查看对应图解状态","labels":["线性读出","编码器 · 冻结","线性头 · 可训练","现有特征能否读出？","微调适配","编码器 · 可训练","任务头 · 可训练","适配后能到哪里？","空间迁移","空间特征 · 按协议","检测 / 分割头","位置与边界可用吗？","共同写明：新数据切分 · 标签预算 · 训练参数范围 · 任务指标"],"description":"冻结编码器的线性读出、可训练编码器的微调和空间任务三种协议，训练范围与数据条件并列。线性读出编码器 · 冻结线性头 · 可训练现有特征能否读出？微调适配编码器 · 可训练任务头 · 可训练适配后能到哪里？空间迁移空间特征 · 按协议检测 / 分割头位置与边界可用吗？共同写明：新数据切分 · 标签预算 · 训练参数范围 · 任务指标","evidenceIdentity":"冻结编码器的线性读出、可训练编码器的微调和空间任务三种协议，训练范围与数据条件并列。 查看对应图解状态","images":[]},"previousBlock":"b-0b0c535f1f20707ac14181c6","nextBlock":"b-72169191cd0053e0eb09bfc6","prerequisites":[{"id":"b-a1529dd6255826b61bab9666","url":"#b-a1529dd6255826b61bab9666","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-72169191cd0053e0eb09bfc6","type":"h2","scope":"narrative","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-72169191cd0053e0eb09bfc6","content":"## 课堂讲述","sha256":"786ce10a6b32a492259a3dccd0a54e61cd41d28a34382fb7b5386c5f03b7ad69","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-5e7c8be69c35c9b264341ce6","nextBlock":"b-061d8af89efbd07a1921061d","prerequisites":[{"id":"b-a1529dd6255826b61bab9666","url":"#b-a1529dd6255826b61bab9666","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-061d8af89efbd07a1921061d","type":"p","scope":"narrative","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-061d8af89efbd07a1921061d","content":"第一种检查，冻结编码器，只训练一个线性读出。这在问：在这种受限的读出方式下，已经得到的特征有多可用？\n第二种检查，允许部分或全部参数继续学习。这在问：以已有参数为起点，适配新任务能够达到什么结果？成功可能来自原有表示，也可能包含适配过程中重新学到的能力。\n第三种，是把表示放进检测或分割，检查空间任务。它们需要的信息和训练接口又不同。所以报告“迁移很好”时，至少要补上迁移到哪里、训练哪些参数、使用多少标签、怎样切分新数据。对科研实践来说，这比只记一个 ImageNet 分数更有用。","sha256":"89c1acaa891d2ff2e2c771c43fb3d8c03a86f7d15a27acb66c69db244f021493","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-72169191cd0053e0eb09bfc6","nextBlock":"b-c4e8f05300cad375cd127ca5","prerequisites":[{"id":"b-72169191cd0053e0eb09bfc6","url":"#b-72169191cd0053e0eb09bfc6","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-c4e8f05300cad375cd127ca5","type":"h3","scope":"readout-versus-finetuning-protocol","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-c4e8f05300cad375cd127ca5","content":"### 冻结读出与微调分别在问什么？","sha256":"c83215e8e774105c969d83883218bbff01e4b69ffdff8ff5bbab0e63db2d1d7a","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"冻结读出与微调分别在问什么？","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":"readout-versus-finetuning-protocol","formulas":[],"previousBlock":"b-061d8af89efbd07a1921061d","nextBlock":"b-b4db9434aa5e74281bf27e9f","prerequisites":[{"id":"b-72169191cd0053e0eb09bfc6","url":"#b-72169191cd0053e0eb09bfc6","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"},{"id":"b-b4db9434aa5e74281bf27e9f","url":"#b-b4db9434aa5e74281bf27e9f","relation":"same-reasoning"},{"id":"b-8c32103ed2f66f6c84278cc8","url":"#b-8c32103ed2f66f6c84278cc8","relation":"same-reasoning"},{"id":"b-b4943a7fba939000a71e8c63","url":"#b-b4943a7fba939000a71e8c63","relation":"same-reasoning"}]},{"id":"b-b4db9434aa5e74281bf27e9f","type":"p","scope":"readout-versus-finetuning-protocol","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-b4db9434aa5e74281bf27e9f","content":"冻结读出把 $f_\\theta$ 固定，只学习新头 $Wh+b$。它问“当前表示中，答案能否被这个受限读出取出？”kNN甚至不拟合新网络，但仍用训练标签建参考库，并依赖距离、归一化和k。微调允许编码器改变，问“这个起点经过给定适配后能做到什么？”","sha256":"4acaebce971b6ea0d4b4101354b8427376bb30d9ed88c0ef19d5ab243972411d","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"冻结读出与微调分别在问什么？","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":"readout-versus-finetuning-protocol","formulas":[{"latex":"f_\\theta","definitionContext":"冻结读出把 $f_\\theta$ 固定，只学习新头 $Wh+b$。它问“当前表示中，答案能否被这个受限读出取出？”kNN甚至不拟合新网络，但仍用训练标签建参考库，并依赖距离、归一化和k。微调允许编码器改变，问“这个起点经过给定适配后能做到什么？”\n公平比较首先固定目标任务、原图划分、标签预算和评价规则。按原图先划分再生成视图，避免同一原图的两个裁剪分别进入训练和测试。超参数和停点用验证集选择，测试集用于最终报告。已经看过的保留结果可供探索，却不再是未知验收题。\n冻结参数还不自动冻结所有状态。含BatchNorm时，运行统计可能在train模式改变；`eval()`、`no_grad()`与`requires_grad_(False)`控制不同对象。LAB 02保留这项实现选读，主讲先抓住“哪些参数可动，答案用在哪里”。"},{"latex":"Wh+b","definitionContext":"冻结读出把 $f_\\theta$ 固定，只学习新头 $Wh+b$。它问“当前表示中，答案能否被这个受限读出取出？”kNN甚至不拟合新网络，但仍用训练标签建参考库，并依赖距离、归一化和k。微调允许编码器改变，问“这个起点经过给定适配后能做到什么？”\n公平比较首先固定目标任务、原图划分、标签预算和评价规则。按原图先划分再生成视图，避免同一原图的两个裁剪分别进入训练和测试。超参数和停点用验证集选择，测试集用于最终报告。已经看过的保留结果可供探索，却不再是未知验收题。\n冻结参数还不自动冻结所有状态。含BatchNorm时，运行统计可能在train模式改变；`eval()`、`no_grad()`与`requires_grad_(False)`控制不同对象。LAB 02保留这项实现选读，主讲先抓住“哪些参数可动，答案用在哪里”。"}],"previousBlock":"b-c4e8f05300cad375cd127ca5","nextBlock":"b-8c32103ed2f66f6c84278cc8","prerequisites":[{"id":"b-c4e8f05300cad375cd127ca5","url":"#b-c4e8f05300cad375cd127ca5","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"},{"id":"b-c4e8f05300cad375cd127ca5","url":"#b-c4e8f05300cad375cd127ca5","relation":"same-reasoning"},{"id":"b-8c32103ed2f66f6c84278cc8","url":"#b-8c32103ed2f66f6c84278cc8","relation":"same-reasoning"},{"id":"b-b4943a7fba939000a71e8c63","url":"#b-b4943a7fba939000a71e8c63","relation":"same-reasoning"}]},{"id":"b-8c32103ed2f66f6c84278cc8","type":"p","scope":"readout-versus-finetuning-protocol","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-8c32103ed2f66f6c84278cc8","content":"公平比较首先固定目标任务、原图划分、标签预算和评价规则。按原图先划分再生成视图，避免同一原图的两个裁剪分别进入训练和测试。超参数和停点用验证集选择，测试集用于最终报告。已经看过的保留结果可供探索，却不再是未知验收题。","sha256":"ad68639e870f873dabd5bb51b94caf66ea41705a05f7587ef204fe83a589e25e","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"冻结读出与微调分别在问什么？","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":"readout-versus-finetuning-protocol","formulas":[],"previousBlock":"b-b4db9434aa5e74281bf27e9f","nextBlock":"b-b4943a7fba939000a71e8c63","prerequisites":[{"id":"b-c4e8f05300cad375cd127ca5","url":"#b-c4e8f05300cad375cd127ca5","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"},{"id":"b-c4e8f05300cad375cd127ca5","url":"#b-c4e8f05300cad375cd127ca5","relation":"same-reasoning"},{"id":"b-b4db9434aa5e74281bf27e9f","url":"#b-b4db9434aa5e74281bf27e9f","relation":"same-reasoning"},{"id":"b-b4943a7fba939000a71e8c63","url":"#b-b4943a7fba939000a71e8c63","relation":"same-reasoning"}]},{"id":"b-b4943a7fba939000a71e8c63","type":"p","scope":"readout-versus-finetuning-protocol","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-b4943a7fba939000a71e8c63","content":"冻结参数还不自动冻结所有状态。含BatchNorm时，运行统计可能在train模式改变；`eval()`、`no_grad()`与`requires_grad_(False)`控制不同对象。LAB 02保留这项实现选读，主讲先抓住“哪些参数可动，答案用在哪里”。","sha256":"865d09ceca4372f3726a049746e16f3e02eaa37161581388c6ad30162ecbd365","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"冻结读出与微调分别在问什么？","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":"readout-versus-finetuning-protocol","formulas":[],"previousBlock":"b-8c32103ed2f66f6c84278cc8","nextBlock":"b-ece9b7f55c0e3923b33086fc","prerequisites":[{"id":"b-c4e8f05300cad375cd127ca5","url":"#b-c4e8f05300cad375cd127ca5","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"},{"id":"b-c4e8f05300cad375cd127ca5","url":"#b-c4e8f05300cad375cd127ca5","relation":"same-reasoning"},{"id":"b-b4db9434aa5e74281bf27e9f","url":"#b-b4db9434aa5e74281bf27e9f","relation":"same-reasoning"},{"id":"b-8c32103ed2f66f6c84278cc8","url":"#b-8c32103ed2f66f6c84278cc8","relation":"same-reasoning"}]},{"id":"b-ece9b7f55c0e3923b33086fc","type":"h4","scope":"h-i-readout-versus-adaptation","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-ece9b7f55c0e3923b33086fc","content":"#### 图示条件与公式约定","sha256":"ef7f915c1ae63ed67bd23fecf050249273ba0efa8965d2c8d1c1c6b2d3178122","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-b4943a7fba939000a71e8c63","nextBlock":"b-7055aee8142caa63a773cbe6","prerequisites":[{"id":"b-c4e8f05300cad375cd127ca5","url":"#b-c4e8f05300cad375cd127ca5","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-7055aee8142caa63a773cbe6","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-7055aee8142caa63a773cbe6","content":"线性读出：冻结编码器，仅训练线性头；微调：注明解冻部分或全部；空间任务也须注明骨干训练范围。不能由一种协议结果替代另一种。","sha256":"cdcb7fb43f8e3b68aeaa17f2e922263995fbb26ca87e01e316776bdf6bb254de","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-ece9b7f55c0e3923b33086fc","nextBlock":"b-1980fe530ad425376b0b991f","prerequisites":[{"id":"b-ece9b7f55c0e3923b33086fc","url":"#b-ece9b7f55c0e3923b33086fc","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-1980fe530ad425376b0b991f","type":"h4","scope":"retained-reading","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-1980fe530ad425376b0b991f","content":"#### 这条线索的展开与后续阅读","sha256":"48b8229f7559b36ed4d5628416e3991e5c73293fbce43374db67386c8736f3bc","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-7055aee8142caa63a773cbe6","nextBlock":"b-992509b8a511430a9524703a","prerequisites":[{"id":"b-ece9b7f55c0e3923b33086fc","url":"#b-ece9b7f55c0e3923b33086fc","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-992509b8a511430a9524703a","type":"ul","scope":"retained-reading","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-992509b8a511430a9524703a","content":"- [信息可以存在，却不一定线性可读](/supplement.html?return=l3-r2-p23/0#/l3-readout-proof/0) L03补充阅读\n- [冻结读出与微调，分别回答什么？](/supplement.html?return=l3-r2-p23/0#/l3-transfer/0) 本页说明\n- [预训练表示，确实可以在新任务里复用](/supplement.html?return=l3-r2-p23/0#/l3-transfer-evidence/0) 本页说明\n- [对比任务由我们构造｜怎样检查这项解释](/supplement.html?return=l3-r2-p23/0#/l3-infonce-matrix-evidence/0) 本页说明","sha256":"254f49d7eee80ed03f8e9230dfbc32e47cc5af9c7aa307d29df7a4f523d48ede","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-1980fe530ad425376b0b991f","nextBlock":"b-12e6e4b6d665814771cb87ef","prerequisites":[{"id":"b-1980fe530ad425376b0b991f","url":"#b-1980fe530ad425376b0b991f","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-12e6e4b6d665814771cb87ef","type":"li","scope":"retained-reading","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-12e6e4b6d665814771cb87ef","content":"- [信息可以存在，却不一定线性可读](/supplement.html?return=l3-r2-p23/0#/l3-readout-proof/0) L03补充阅读","sha256":"6634f90d132f277ea605ed3c2315d1a3b7fc64223c9c62baaf35e899c95ccf4c","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-992509b8a511430a9524703a","nextBlock":"b-9533fc070c6152720de27478","prerequisites":[{"id":"b-1980fe530ad425376b0b991f","url":"#b-1980fe530ad425376b0b991f","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-9533fc070c6152720de27478","type":"li","scope":"retained-reading","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-9533fc070c6152720de27478","content":"- [冻结读出与微调，分别回答什么？](/supplement.html?return=l3-r2-p23/0#/l3-transfer/0) 本页说明","sha256":"4faf37dc5a7f3cb6872a337a45222fe7c0a9dd5f95572c7928652c4dfc1155d1","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-12e6e4b6d665814771cb87ef","nextBlock":"b-98b8dd3cd1b9c74297c83cd2","prerequisites":[{"id":"b-1980fe530ad425376b0b991f","url":"#b-1980fe530ad425376b0b991f","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-98b8dd3cd1b9c74297c83cd2","type":"li","scope":"retained-reading","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-98b8dd3cd1b9c74297c83cd2","content":"- [预训练表示，确实可以在新任务里复用](/supplement.html?return=l3-r2-p23/0#/l3-transfer-evidence/0) 本页说明","sha256":"c91f3a694a858984489c29e2d95d1f78baaa1f442aeb97dae87de4df1d6d4d5b","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-9533fc070c6152720de27478","nextBlock":"b-cca604978b6d06351ac0f390","prerequisites":[{"id":"b-1980fe530ad425376b0b991f","url":"#b-1980fe530ad425376b0b991f","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-cca604978b6d06351ac0f390","type":"li","scope":"retained-reading","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-cca604978b6d06351ac0f390","content":"- [对比任务由我们构造｜怎样检查这项解释](/supplement.html?return=l3-r2-p23/0#/l3-infonce-matrix-evidence/0) 本页说明","sha256":"eff8a37ac6432b14cfc2e0a11ae16350e2c601167cc2621a0308e3bd7c9509fb","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-readout-versus-adaptation","title":"先说明允许哪些参数改变，再比较结果","number":2},"sectionTitle":"先说明允许哪些参数改变，再比较结果","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-98b8dd3cd1b9c74297c83cd2","nextBlock":null,"prerequisites":[{"id":"b-1980fe530ad425376b0b991f","url":"#b-1980fe530ad425376b0b991f","role":"section-title"},{"id":"b-0b0c535f1f20707ac14181c6","url":"#b-0b0c535f1f20707ac14181c6","role":"problem-context"}],"relatedBlocks":[{"id":"b-5e7c8be69c35c9b264341ce6","url":"#b-5e7c8be69c35c9b264341ce6","relation":"figure-and-explanation"}]},{"id":"b-4f4e0fc9426e6ee5e8112eb0","type":"h2","scope":"h-i-information-versus-readable-form","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-4f4e0fc9426e6ee5e8112eb0","content":"## 四点 XOR：信息存在，不等于一条直线能读出","sha256":"7b067eb89d0bb65e1b5610cb08fcbaccffd6d8cabf837f4a5f94a8ea97db490d","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","number":3},"sectionTitle":"四点 XOR：信息存在，不等于一条直线能读出","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p12","l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":null,"nextBlock":"b-276d0ff3a1aedf2bac257dd6","prerequisites":[{"id":"b-276d0ff3a1aedf2bac257dd6","url":"#b-276d0ff3a1aedf2bac257dd6","role":"problem-context"}],"relatedBlocks":[{"id":"b-17243d5fbf5b1244fa7b5e6c","url":"#b-17243d5fbf5b1244fa7b5e6c","relation":"figure-and-explanation"}]},{"id":"b-276d0ff3a1aedf2bac257dd6","type":"p","scope":"h-i-information-versus-readable-form","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-276d0ff3a1aedf2bac257dd6","content":"把表示中的任务信息、输入身份和读出函数类分开，避免用单一失败作过强结论。","sha256":"93869cdd112247775138f973bc0b4e2e5d5f9af827d83c1446787fbd8711a94f","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","number":3},"sectionTitle":"四点 XOR：信息存在，不等于一条直线能读出","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p12","l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-4f4e0fc9426e6ee5e8112eb0","nextBlock":"b-ca664a22be2ba8570dc0427b","prerequisites":[{"id":"b-4f4e0fc9426e6ee5e8112eb0","url":"#b-4f4e0fc9426e6ee5e8112eb0","role":"section-title"}],"relatedBlocks":[{"id":"b-17243d5fbf5b1244fa7b5e6c","url":"#b-17243d5fbf5b1244fa7b5e6c","relation":"figure-and-explanation"}]},{"id":"b-ca664a22be2ba8570dc0427b","type":"h3","scope":"information-and-readable-form","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-ca664a22be2ba8570dc0427b","content":"### 信息还在，与一条直线能读出是两件事","sha256":"83cc6f4d6b2ea75dac9fe5d48f48634dd74d3a016f252179c316c9d06d58a1e5","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","number":3},"sectionTitle":"信息还在，与一条直线能读出是两件事","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p12","l3-r2-p23"],"knowledgeBlock":"information-and-readable-form","formulas":[],"previousBlock":"b-276d0ff3a1aedf2bac257dd6","nextBlock":"b-af0af264a5be272ec4b02556","prerequisites":[{"id":"b-4f4e0fc9426e6ee5e8112eb0","url":"#b-4f4e0fc9426e6ee5e8112eb0","role":"section-title"},{"id":"b-276d0ff3a1aedf2bac257dd6","url":"#b-276d0ff3a1aedf2bac257dd6","role":"problem-context"}],"relatedBlocks":[{"id":"b-af0af264a5be272ec4b02556","url":"#b-af0af264a5be272ec4b02556","relation":"same-reasoning"},{"id":"b-17243d5fbf5b1244fa7b5e6c","url":"#b-17243d5fbf5b1244fa7b5e6c","relation":"figure-and-explanation"},{"id":"b-91ba6214cedc99d82a1f3fdf","url":"#b-91ba6214cedc99d82a1f3fdf","relation":"same-reasoning"},{"id":"b-a76e6931228585e897ed5ebf","url":"#b-a76e6931228585e897ed5ebf","relation":"same-reasoning"},{"id":"b-b9b907bc44eeabe93be5fadf","url":"#b-b9b907bc44eeabe93be5fadf","relation":"same-reasoning"},{"id":"b-2b78c15de9c901690f50c146","url":"#b-2b78c15de9c901690f50c146","relation":"same-reasoning"},{"id":"b-55439e5b70be533cdd41e4c9","url":"#b-55439e5b70be533cdd41e4c9","relation":"same-reasoning"},{"id":"b-159b5a996ae300358676f293","url":"#b-159b5a996ae300358676f293","relation":"same-reasoning"},{"id":"b-3d142dbbfa2038323aed045b","url":"#b-3d142dbbfa2038323aed045b","relation":"same-reasoning"}]},{"id":"b-af0af264a5be272ec4b02556","type":"p","scope":"information-and-readable-form","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-af0af264a5be272ec4b02556","content":"四点 h 为 (−1,−1)、(−1,+1)、(+1,−1)、(+1,+1)，同号标签 0、异号标签 1。每一点都不同，标签由 h 完全确定；但两类位于对角，无法用一条直线完全分开。","sha256":"1930bf83877756adf75cfa5c58cf95b5772cfcc1326d7d8f2020e866564690ec","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","number":3},"sectionTitle":"信息还在，与一条直线能读出是两件事","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p12","l3-r2-p23"],"knowledgeBlock":"information-and-readable-form","formulas":[],"previousBlock":"b-ca664a22be2ba8570dc0427b","nextBlock":"b-17243d5fbf5b1244fa7b5e6c","prerequisites":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","role":"section-title"},{"id":"b-276d0ff3a1aedf2bac257dd6","url":"#b-276d0ff3a1aedf2bac257dd6","role":"problem-context"}],"relatedBlocks":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","relation":"same-reasoning"},{"id":"b-17243d5fbf5b1244fa7b5e6c","url":"#b-17243d5fbf5b1244fa7b5e6c","relation":"figure-and-explanation"},{"id":"b-91ba6214cedc99d82a1f3fdf","url":"#b-91ba6214cedc99d82a1f3fdf","relation":"same-reasoning"},{"id":"b-a76e6931228585e897ed5ebf","url":"#b-a76e6931228585e897ed5ebf","relation":"same-reasoning"},{"id":"b-b9b907bc44eeabe93be5fadf","url":"#b-b9b907bc44eeabe93be5fadf","relation":"same-reasoning"},{"id":"b-2b78c15de9c901690f50c146","url":"#b-2b78c15de9c901690f50c146","relation":"same-reasoning"},{"id":"b-55439e5b70be533cdd41e4c9","url":"#b-55439e5b70be533cdd41e4c9","relation":"same-reasoning"},{"id":"b-159b5a996ae300358676f293","url":"#b-159b5a996ae300358676f293","relation":"same-reasoning"},{"id":"b-3d142dbbfa2038323aed045b","url":"#b-3d142dbbfa2038323aed045b","relation":"same-reasoning"}]},{"id":"b-17243d5fbf5b1244fa7b5e6c","type":"figure","scope":"information-and-readable-form","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-17243d5fbf5b1244fa7b5e6c","content":"![左图四个 h 坐标：同号两角为标签 0、异号两角为标签 1；右图 z=h1h2 数轴，两个标签 1 输入都落在 −1，两个标签 0 输入都落在 +1，阈值为 0。每个数轴位置对应两个输入。](/course/knowledge-assets/xor-readable-form.svg)[放大查看四点图 ↗](/course/knowledge-assets/xor-readable-form.svg) · 精确构造的四点读出：左图保留输入身份，右图用乘积改变可读形式。图中位置和标签由数据表确定，并非训练输出。","sha256":"f093509431a84fb2c610445f3d3b5a82309f84203f3e3f14bf27b4437d970aca","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","number":3},"sectionTitle":"信息还在，与一条直线能读出是两件事","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p12","l3-r2-p23"],"knowledgeBlock":"information-and-readable-form","formulas":[],"figure":{"caption":"放大查看四点图 ↗ · 精确构造的四点读出：左图保留输入身份，右图用乘积改变可读形式。图中位置和标签由数据表确定，并非训练输出。","labels":[],"description":"左图四个 h 坐标：同号两角为标签 0、异号两角为标签 1；右图 z=h1h2 数轴，两个标签 1 输入都落在 −1，两个标签 0 输入都落在 +1，阈值为 0。每个数轴位置对应两个输入。","evidenceIdentity":"放大查看四点图 ↗ · 精确构造的四点读出：左图保留输入身份，右图用乘积改变可读形式。图中位置和标签由数据表确定，并非训练输出。","images":[{"src":"/course/knowledge-assets/xor-readable-form.svg","alt":"左图四个 h 坐标：同号两角为标签 0、异号两角为标签 1；右图 z=h1h2 数轴，两个标签 1 输入都落在 −1，两个标签 0 输入都落在 +1，阈值为 0。每个数轴位置对应两个输入。"}]},"previousBlock":"b-af0af264a5be272ec4b02556","nextBlock":"b-91ba6214cedc99d82a1f3fdf","prerequisites":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","role":"section-title"},{"id":"b-276d0ff3a1aedf2bac257dd6","url":"#b-276d0ff3a1aedf2bac257dd6","role":"problem-context"}],"relatedBlocks":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","relation":"same-reasoning"},{"id":"b-af0af264a5be272ec4b02556","url":"#b-af0af264a5be272ec4b02556","relation":"same-reasoning"},{"id":"b-91ba6214cedc99d82a1f3fdf","url":"#b-91ba6214cedc99d82a1f3fdf","relation":"same-reasoning"},{"id":"b-a76e6931228585e897ed5ebf","url":"#b-a76e6931228585e897ed5ebf","relation":"same-reasoning"},{"id":"b-b9b907bc44eeabe93be5fadf","url":"#b-b9b907bc44eeabe93be5fadf","relation":"same-reasoning"},{"id":"b-2b78c15de9c901690f50c146","url":"#b-2b78c15de9c901690f50c146","relation":"same-reasoning"},{"id":"b-55439e5b70be533cdd41e4c9","url":"#b-55439e5b70be533cdd41e4c9","relation":"same-reasoning"},{"id":"b-159b5a996ae300358676f293","url":"#b-159b5a996ae300358676f293","relation":"same-reasoning"},{"id":"b-3d142dbbfa2038323aed045b","url":"#b-3d142dbbfa2038323aed045b","relation":"same-reasoning"}]},{"id":"b-91ba6214cedc99d82a1f3fdf","type":"p","scope":"information-and-readable-form","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-91ba6214cedc99d82a1f3fdf","content":"左图每个输入都有独立坐标，标签也完全由坐标确定；但同类占据对角，不能用一条直线把两类完全分开。右图只保留乘积 $z=h_1h_2$：两个异号输入都落在 −1，两个同号输入都落在 +1。现在一个零阈值 $z<0$ 就能正确读取标签；每个数轴位置合并了两个输入，图中不通过抖动伪造不同的 z 值。","sha256":"2d5f76b8d3cfb8ced744aa188d5afb1f00466080dc571f23058e7525f9352c9b","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","number":3},"sectionTitle":"信息还在，与一条直线能读出是两件事","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p12","l3-r2-p23"],"knowledgeBlock":"information-and-readable-form","formulas":[{"latex":"z=h_1h_2","definitionContext":"四点 h 为 (−1,−1)、(−1,+1)、(+1,−1)、(+1,+1)，同号标签 0、异号标签 1。每一点都不同，标签由 h 完全确定；但两类位于对角，无法用一条直线完全分开。\n左图每个输入都有独立坐标，标签也完全由坐标确定；但同类占据对角，不能用一条直线把两类完全分开。右图只保留乘积 $z=h_1h_2$：两个异号输入都落在 −1，两个同号输入都落在 +1。现在一个零阈值 $z<0$ 就能正确读取标签；每个数轴位置合并了两个输入，图中不通过抖动伪造不同的 z 值。\n这个变换没有增加标签信息，并且合并了原来不同的输入身份。它是四点上的精确构造，不是某次训练得到的表征，也不能证明任意压缩都会改善读出，或少量训练样本一定能学出这个变换。\n以下是备课用模拟追问，不是课堂实录。\n**学生：**“既然左图不能画一条分界线，是不是标签信息已经丢了？”\n**教师：**“先看数据表，每个 h 都仍唯一确定标签；失败的是单一直线这类读出。换一个乘积坐标后，一条阈值就足够。可是只看 z，你已不能恢复原来是哪一个同号角点。这正好把‘某任务的信息’‘原输入身份’和‘读出函数能否使用’分开。”\n因此低维不必等于丢掉任务信息，线性失败也不必等于信息全无。LAB18 同时报告 XOR 读出与离散 bit 算例；把结论限定在明确的输入、标签和函数类上，比笼统说“表示越压缩越好”更准确。"},{"latex":"z<0","definitionContext":"四点 h 为 (−1,−1)、(−1,+1)、(+1,−1)、(+1,+1)，同号标签 0、异号标签 1。每一点都不同，标签由 h 完全确定；但两类位于对角，无法用一条直线完全分开。\n左图每个输入都有独立坐标，标签也完全由坐标确定；但同类占据对角，不能用一条直线把两类完全分开。右图只保留乘积 $z=h_1h_2$：两个异号输入都落在 −1，两个同号输入都落在 +1。现在一个零阈值 $z<0$ 就能正确读取标签；每个数轴位置合并了两个输入，图中不通过抖动伪造不同的 z 值。\n这个变换没有增加标签信息，并且合并了原来不同的输入身份。它是四点上的精确构造，不是某次训练得到的表征，也不能证明任意压缩都会改善读出，或少量训练样本一定能学出这个变换。\n以下是备课用模拟追问，不是课堂实录。\n**学生：**“既然左图不能画一条分界线，是不是标签信息已经丢了？”\n**教师：**“先看数据表，每个 h 都仍唯一确定标签；失败的是单一直线这类读出。换一个乘积坐标后，一条阈值就足够。可是只看 z，你已不能恢复原来是哪一个同号角点。这正好把‘某任务的信息’‘原输入身份’和‘读出函数能否使用’分开。”\n因此低维不必等于丢掉任务信息，线性失败也不必等于信息全无。LAB18 同时报告 XOR 读出与离散 bit 算例；把结论限定在明确的输入、标签和函数类上，比笼统说“表示越压缩越好”更准确。"}],"previousBlock":"b-17243d5fbf5b1244fa7b5e6c","nextBlock":"b-a76e6931228585e897ed5ebf","prerequisites":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","role":"section-title"},{"id":"b-276d0ff3a1aedf2bac257dd6","url":"#b-276d0ff3a1aedf2bac257dd6","role":"problem-context"}],"relatedBlocks":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","relation":"same-reasoning"},{"id":"b-af0af264a5be272ec4b02556","url":"#b-af0af264a5be272ec4b02556","relation":"same-reasoning"},{"id":"b-17243d5fbf5b1244fa7b5e6c","url":"#b-17243d5fbf5b1244fa7b5e6c","relation":"figure-and-explanation"},{"id":"b-a76e6931228585e897ed5ebf","url":"#b-a76e6931228585e897ed5ebf","relation":"same-reasoning"},{"id":"b-b9b907bc44eeabe93be5fadf","url":"#b-b9b907bc44eeabe93be5fadf","relation":"same-reasoning"},{"id":"b-2b78c15de9c901690f50c146","url":"#b-2b78c15de9c901690f50c146","relation":"same-reasoning"},{"id":"b-55439e5b70be533cdd41e4c9","url":"#b-55439e5b70be533cdd41e4c9","relation":"same-reasoning"},{"id":"b-159b5a996ae300358676f293","url":"#b-159b5a996ae300358676f293","relation":"same-reasoning"},{"id":"b-3d142dbbfa2038323aed045b","url":"#b-3d142dbbfa2038323aed045b","relation":"same-reasoning"}]},{"id":"b-a76e6931228585e897ed5ebf","type":"table","scope":"information-and-readable-form","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-a76e6931228585e897ed5ebf","content":"| h1 | h2 | 标签 y | z=h1h2 |\n| --- | --- | --- | --- |\n| −1 | −1 | 0 | +1 |\n| −1 | +1 | 1 | −1 |\n| +1 | −1 | 1 | −1 |\n| +1 | +1 | 0 | +1 |","sha256":"7a3f933836db009062ad428f8b1c642b784d261baa91295c6194613a3ef1a5c7","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","number":3},"sectionTitle":"信息还在，与一条直线能读出是两件事","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p12","l3-r2-p23"],"knowledgeBlock":"information-and-readable-form","formulas":[],"table":{"headers":["h1","h2","标签 y","z=h1h2"],"rows":[["h1","h2","标签 y","z=h1h2"],["−1","−1","0","+1"],["−1","+1","1","−1"],["+1","−1","1","−1"],["+1","+1","0","+1"]]},"previousBlock":"b-91ba6214cedc99d82a1f3fdf","nextBlock":"b-b9b907bc44eeabe93be5fadf","prerequisites":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","role":"section-title"},{"id":"b-276d0ff3a1aedf2bac257dd6","url":"#b-276d0ff3a1aedf2bac257dd6","role":"problem-context"}],"relatedBlocks":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","relation":"same-reasoning"},{"id":"b-af0af264a5be272ec4b02556","url":"#b-af0af264a5be272ec4b02556","relation":"same-reasoning"},{"id":"b-17243d5fbf5b1244fa7b5e6c","url":"#b-17243d5fbf5b1244fa7b5e6c","relation":"figure-and-explanation"},{"id":"b-91ba6214cedc99d82a1f3fdf","url":"#b-91ba6214cedc99d82a1f3fdf","relation":"same-reasoning"},{"id":"b-b9b907bc44eeabe93be5fadf","url":"#b-b9b907bc44eeabe93be5fadf","relation":"same-reasoning"},{"id":"b-2b78c15de9c901690f50c146","url":"#b-2b78c15de9c901690f50c146","relation":"same-reasoning"},{"id":"b-55439e5b70be533cdd41e4c9","url":"#b-55439e5b70be533cdd41e4c9","relation":"same-reasoning"},{"id":"b-159b5a996ae300358676f293","url":"#b-159b5a996ae300358676f293","relation":"same-reasoning"},{"id":"b-3d142dbbfa2038323aed045b","url":"#b-3d142dbbfa2038323aed045b","relation":"same-reasoning"}]},{"id":"b-b9b907bc44eeabe93be5fadf","type":"p","scope":"information-and-readable-form","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-b9b907bc44eeabe93be5fadf","content":"这个变换没有增加标签信息，并且合并了原来不同的输入身份。它是四点上的精确构造，不是某次训练得到的表征，也不能证明任意压缩都会改善读出，或少量训练样本一定能学出这个变换。","sha256":"6969640774b1a963aa2e847f536e3a2a63f0fbb869ddbd910db1346595ececb6","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","number":3},"sectionTitle":"信息还在，与一条直线能读出是两件事","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p12","l3-r2-p23"],"knowledgeBlock":"information-and-readable-form","formulas":[],"previousBlock":"b-a76e6931228585e897ed5ebf","nextBlock":"b-2b78c15de9c901690f50c146","prerequisites":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","role":"section-title"},{"id":"b-276d0ff3a1aedf2bac257dd6","url":"#b-276d0ff3a1aedf2bac257dd6","role":"problem-context"}],"relatedBlocks":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","relation":"same-reasoning"},{"id":"b-af0af264a5be272ec4b02556","url":"#b-af0af264a5be272ec4b02556","relation":"same-reasoning"},{"id":"b-17243d5fbf5b1244fa7b5e6c","url":"#b-17243d5fbf5b1244fa7b5e6c","relation":"figure-and-explanation"},{"id":"b-91ba6214cedc99d82a1f3fdf","url":"#b-91ba6214cedc99d82a1f3fdf","relation":"same-reasoning"},{"id":"b-a76e6931228585e897ed5ebf","url":"#b-a76e6931228585e897ed5ebf","relation":"same-reasoning"},{"id":"b-2b78c15de9c901690f50c146","url":"#b-2b78c15de9c901690f50c146","relation":"same-reasoning"},{"id":"b-55439e5b70be533cdd41e4c9","url":"#b-55439e5b70be533cdd41e4c9","relation":"same-reasoning"},{"id":"b-159b5a996ae300358676f293","url":"#b-159b5a996ae300358676f293","relation":"same-reasoning"},{"id":"b-3d142dbbfa2038323aed045b","url":"#b-3d142dbbfa2038323aed045b","relation":"same-reasoning"}]},{"id":"b-2b78c15de9c901690f50c146","type":"p","scope":"information-and-readable-form","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-2b78c15de9c901690f50c146","content":"以下是备课用模拟追问，不是课堂实录。","sha256":"08efab5c92c447160954bde9f10fb7f29f121d6da81ebdb56aefe509a904a0d9","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","number":3},"sectionTitle":"信息还在，与一条直线能读出是两件事","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p12","l3-r2-p23"],"knowledgeBlock":"information-and-readable-form","formulas":[],"previousBlock":"b-b9b907bc44eeabe93be5fadf","nextBlock":"b-55439e5b70be533cdd41e4c9","prerequisites":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","role":"section-title"},{"id":"b-276d0ff3a1aedf2bac257dd6","url":"#b-276d0ff3a1aedf2bac257dd6","role":"problem-context"}],"relatedBlocks":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","relation":"same-reasoning"},{"id":"b-af0af264a5be272ec4b02556","url":"#b-af0af264a5be272ec4b02556","relation":"same-reasoning"},{"id":"b-17243d5fbf5b1244fa7b5e6c","url":"#b-17243d5fbf5b1244fa7b5e6c","relation":"figure-and-explanation"},{"id":"b-91ba6214cedc99d82a1f3fdf","url":"#b-91ba6214cedc99d82a1f3fdf","relation":"same-reasoning"},{"id":"b-a76e6931228585e897ed5ebf","url":"#b-a76e6931228585e897ed5ebf","relation":"same-reasoning"},{"id":"b-b9b907bc44eeabe93be5fadf","url":"#b-b9b907bc44eeabe93be5fadf","relation":"same-reasoning"},{"id":"b-55439e5b70be533cdd41e4c9","url":"#b-55439e5b70be533cdd41e4c9","relation":"same-reasoning"},{"id":"b-159b5a996ae300358676f293","url":"#b-159b5a996ae300358676f293","relation":"same-reasoning"},{"id":"b-3d142dbbfa2038323aed045b","url":"#b-3d142dbbfa2038323aed045b","relation":"same-reasoning"}]},{"id":"b-55439e5b70be533cdd41e4c9","type":"p","scope":"information-and-readable-form","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-55439e5b70be533cdd41e4c9","content":"**学生：**“既然左图不能画一条分界线，是不是标签信息已经丢了？”","sha256":"523fca1832f0469186861e7749b91b19e43077ad0e2c93553f13d3d93d479f13","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","number":3},"sectionTitle":"信息还在，与一条直线能读出是两件事","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p12","l3-r2-p23"],"knowledgeBlock":"information-and-readable-form","formulas":[],"previousBlock":"b-2b78c15de9c901690f50c146","nextBlock":"b-159b5a996ae300358676f293","prerequisites":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","role":"section-title"},{"id":"b-276d0ff3a1aedf2bac257dd6","url":"#b-276d0ff3a1aedf2bac257dd6","role":"problem-context"}],"relatedBlocks":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","relation":"same-reasoning"},{"id":"b-af0af264a5be272ec4b02556","url":"#b-af0af264a5be272ec4b02556","relation":"same-reasoning"},{"id":"b-17243d5fbf5b1244fa7b5e6c","url":"#b-17243d5fbf5b1244fa7b5e6c","relation":"figure-and-explanation"},{"id":"b-91ba6214cedc99d82a1f3fdf","url":"#b-91ba6214cedc99d82a1f3fdf","relation":"same-reasoning"},{"id":"b-a76e6931228585e897ed5ebf","url":"#b-a76e6931228585e897ed5ebf","relation":"same-reasoning"},{"id":"b-b9b907bc44eeabe93be5fadf","url":"#b-b9b907bc44eeabe93be5fadf","relation":"same-reasoning"},{"id":"b-2b78c15de9c901690f50c146","url":"#b-2b78c15de9c901690f50c146","relation":"same-reasoning"},{"id":"b-159b5a996ae300358676f293","url":"#b-159b5a996ae300358676f293","relation":"same-reasoning"},{"id":"b-3d142dbbfa2038323aed045b","url":"#b-3d142dbbfa2038323aed045b","relation":"same-reasoning"}]},{"id":"b-159b5a996ae300358676f293","type":"p","scope":"information-and-readable-form","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-159b5a996ae300358676f293","content":"**教师：**“先看数据表，每个 h 都仍唯一确定标签；失败的是单一直线这类读出。换一个乘积坐标后，一条阈值就足够。可是只看 z，你已不能恢复原来是哪一个同号角点。这正好把‘某任务的信息’‘原输入身份’和‘读出函数能否使用’分开。”","sha256":"40f207c687aab5b36977d373a6f71935931c393ce223e5f1bb4f25bed0024cec","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","number":3},"sectionTitle":"信息还在，与一条直线能读出是两件事","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p12","l3-r2-p23"],"knowledgeBlock":"information-and-readable-form","formulas":[],"previousBlock":"b-55439e5b70be533cdd41e4c9","nextBlock":"b-3d142dbbfa2038323aed045b","prerequisites":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","role":"section-title"},{"id":"b-276d0ff3a1aedf2bac257dd6","url":"#b-276d0ff3a1aedf2bac257dd6","role":"problem-context"}],"relatedBlocks":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","relation":"same-reasoning"},{"id":"b-af0af264a5be272ec4b02556","url":"#b-af0af264a5be272ec4b02556","relation":"same-reasoning"},{"id":"b-17243d5fbf5b1244fa7b5e6c","url":"#b-17243d5fbf5b1244fa7b5e6c","relation":"figure-and-explanation"},{"id":"b-91ba6214cedc99d82a1f3fdf","url":"#b-91ba6214cedc99d82a1f3fdf","relation":"same-reasoning"},{"id":"b-a76e6931228585e897ed5ebf","url":"#b-a76e6931228585e897ed5ebf","relation":"same-reasoning"},{"id":"b-b9b907bc44eeabe93be5fadf","url":"#b-b9b907bc44eeabe93be5fadf","relation":"same-reasoning"},{"id":"b-2b78c15de9c901690f50c146","url":"#b-2b78c15de9c901690f50c146","relation":"same-reasoning"},{"id":"b-55439e5b70be533cdd41e4c9","url":"#b-55439e5b70be533cdd41e4c9","relation":"same-reasoning"},{"id":"b-3d142dbbfa2038323aed045b","url":"#b-3d142dbbfa2038323aed045b","relation":"same-reasoning"}]},{"id":"b-3d142dbbfa2038323aed045b","type":"p","scope":"information-and-readable-form","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-3d142dbbfa2038323aed045b","content":"因此低维不必等于丢掉任务信息，线性失败也不必等于信息全无。LAB18 同时报告 XOR 读出与离散 bit 算例；把结论限定在明确的输入、标签和函数类上，比笼统说“表示越压缩越好”更准确。","sha256":"e86db534f92e00b836265db0419627bfb8467b057532ab8d62710e84a0c1240a","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-information-versus-readable-form","title":"四点 XOR：信息存在，不等于一条直线能读出","number":3},"sectionTitle":"信息还在，与一条直线能读出是两件事","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p12","l3-r2-p23"],"knowledgeBlock":"information-and-readable-form","formulas":[],"previousBlock":"b-159b5a996ae300358676f293","nextBlock":null,"prerequisites":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","role":"section-title"},{"id":"b-276d0ff3a1aedf2bac257dd6","url":"#b-276d0ff3a1aedf2bac257dd6","role":"problem-context"}],"relatedBlocks":[{"id":"b-ca664a22be2ba8570dc0427b","url":"#b-ca664a22be2ba8570dc0427b","relation":"same-reasoning"},{"id":"b-af0af264a5be272ec4b02556","url":"#b-af0af264a5be272ec4b02556","relation":"same-reasoning"},{"id":"b-17243d5fbf5b1244fa7b5e6c","url":"#b-17243d5fbf5b1244fa7b5e6c","relation":"figure-and-explanation"},{"id":"b-91ba6214cedc99d82a1f3fdf","url":"#b-91ba6214cedc99d82a1f3fdf","relation":"same-reasoning"},{"id":"b-a76e6931228585e897ed5ebf","url":"#b-a76e6931228585e897ed5ebf","relation":"same-reasoning"},{"id":"b-b9b907bc44eeabe93be5fadf","url":"#b-b9b907bc44eeabe93be5fadf","relation":"same-reasoning"},{"id":"b-2b78c15de9c901690f50c146","url":"#b-2b78c15de9c901690f50c146","relation":"same-reasoning"},{"id":"b-55439e5b70be533cdd41e4c9","url":"#b-55439e5b70be533cdd41e4c9","relation":"same-reasoning"},{"id":"b-159b5a996ae300358676f293","url":"#b-159b5a996ae300358676f293","relation":"same-reasoning"}]},{"id":"b-139c9af4cafd967471704467","type":"h2","scope":"h-i-fixed-features-label-budget","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-139c9af4cafd967471704467","content":"## 读 LAB01：固定表示，只改变预算与读出","sha256":"151020cff529a53b6b33fc94d44473cb786130de37ddd928a483f7b3e4960e3a","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-fixed-features-label-budget","title":"读 LAB01：固定表示，只改变预算与读出","number":4},"sectionTitle":"读 LAB01：固定表示，只改变预算与读出","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":null,"nextBlock":"b-108625889a2127e320f7573f","prerequisites":[{"id":"b-108625889a2127e320f7573f","url":"#b-108625889a2127e320f7573f","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-108625889a2127e320f7573f","type":"p","scope":"h-i-fixed-features-label-budget","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-108625889a2127e320f7573f","content":"编码器始终不动，先固定标签预算比较读出，再固定读出比较预算。","sha256":"064978fac03de25395da2ba3e56c0c1927266324369a3adf8fa0f52061d6c269","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-fixed-features-label-budget","title":"读 LAB01：固定表示，只改变预算与读出","number":4},"sectionTitle":"读 LAB01：固定表示，只改变预算与读出","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-139c9af4cafd967471704467","nextBlock":"b-06954fd4d0092f9b923fe2e1","prerequisites":[{"id":"b-139c9af4cafd967471704467","url":"#b-139c9af4cafd967471704467","role":"section-title"}],"relatedBlocks":[]},{"id":"b-06954fd4d0092f9b923fe2e1","type":"h3","scope":"fixed-representation-label-budget-evidence","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-06954fd4d0092f9b923fe2e1","content":"### 同一表示，增加标签与改变读出是两种干预","sha256":"bb79b4ac4a6cf6362f66fa05737d66ba3e64490142c050c425af0a7f198b6a8b","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-fixed-features-label-budget","title":"读 LAB01：固定表示，只改变预算与读出","number":4},"sectionTitle":"同一表示，增加标签与改变读出是两种干预","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":"fixed-representation-label-budget-evidence","formulas":[],"previousBlock":"b-108625889a2127e320f7573f","nextBlock":"b-1366c5a935817eadaa7a3763","prerequisites":[{"id":"b-139c9af4cafd967471704467","url":"#b-139c9af4cafd967471704467","role":"section-title"},{"id":"b-108625889a2127e320f7573f","url":"#b-108625889a2127e320f7573f","role":"problem-context"}],"relatedBlocks":[{"id":"b-1366c5a935817eadaa7a3763","url":"#b-1366c5a935817eadaa7a3763","relation":"same-reasoning"},{"id":"b-593b140d7f3d955b627d1096","url":"#b-593b140d7f3d955b627d1096","relation":"same-reasoning"},{"id":"b-8be4e18c13e70ac3c6c16dda","url":"#b-8be4e18c13e70ac3c6c16dda","relation":"same-reasoning"}]},{"id":"b-1366c5a935817eadaa7a3763","type":"p","scope":"fixed-representation-label-budget-evidence","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-1366c5a935817eadaa7a3763","content":"LAB 01使用一个已有有监督CNN的32维表示，目标为MNIST数字是否≥5。640个目标样本与源模型训练/验证索引分离，目标再分256训练、128验证、256保留；图像统一右移2像素。","sha256":"a1e8649573c010293d8b99009a59442b5eb9c434705fdc3b4215f2627fae31be","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-fixed-features-label-budget","title":"读 LAB01：固定表示，只改变预算与读出","number":4},"sectionTitle":"同一表示，增加标签与改变读出是两种干预","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":"fixed-representation-label-budget-evidence","formulas":[],"previousBlock":"b-06954fd4d0092f9b923fe2e1","nextBlock":"b-593b140d7f3d955b627d1096","prerequisites":[{"id":"b-06954fd4d0092f9b923fe2e1","url":"#b-06954fd4d0092f9b923fe2e1","role":"section-title"},{"id":"b-108625889a2127e320f7573f","url":"#b-108625889a2127e320f7573f","role":"problem-context"}],"relatedBlocks":[{"id":"b-06954fd4d0092f9b923fe2e1","url":"#b-06954fd4d0092f9b923fe2e1","relation":"same-reasoning"},{"id":"b-593b140d7f3d955b627d1096","url":"#b-593b140d7f3d955b627d1096","relation":"same-reasoning"},{"id":"b-8be4e18c13e70ac3c6c16dda","url":"#b-8be4e18c13e70ac3c6c16dda","relation":"same-reasoning"}]},{"id":"b-593b140d7f3d955b627d1096","type":"p","scope":"fixed-representation-label-budget-evidence","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-593b140d7f3d955b627d1096","content":"保存结果中，标签32→256时，kNN保留准确率从0.7148到0.9492；固定C=10的线性逻辑回归从0.6133到0.8359。编码器从头到尾未变，所以差别来自标签预算与读出使用方式，而不是编码器重新学了一次。","sha256":"98840bf437de632f505935090056c5d148d5693b8b7862561f53aa550909a0e6","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-fixed-features-label-budget","title":"读 LAB01：固定表示，只改变预算与读出","number":4},"sectionTitle":"同一表示，增加标签与改变读出是两种干预","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":"fixed-representation-label-budget-evidence","formulas":[],"previousBlock":"b-1366c5a935817eadaa7a3763","nextBlock":"b-8be4e18c13e70ac3c6c16dda","prerequisites":[{"id":"b-06954fd4d0092f9b923fe2e1","url":"#b-06954fd4d0092f9b923fe2e1","role":"section-title"},{"id":"b-108625889a2127e320f7573f","url":"#b-108625889a2127e320f7573f","role":"problem-context"}],"relatedBlocks":[{"id":"b-06954fd4d0092f9b923fe2e1","url":"#b-06954fd4d0092f9b923fe2e1","relation":"same-reasoning"},{"id":"b-1366c5a935817eadaa7a3763","url":"#b-1366c5a935817eadaa7a3763","relation":"same-reasoning"},{"id":"b-8be4e18c13e70ac3c6c16dda","url":"#b-8be4e18c13e70ac3c6c16dda","relation":"same-reasoning"}]},{"id":"b-8be4e18c13e70ac3c6c16dda","type":"p","scope":"fixed-representation-label-budget-evidence","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-8be4e18c13e70ac3c6c16dda","content":"这提供一个很具体的学习动作：先固定预算比较两种读出，再固定读出比较预算。不要把这组结果误读成“自监督胜过监督”；源CNN本来就是监督训练的。也不要据单次差距断言表示中没有某种信息——正则强度和读出函数类都是竞争解释。","sha256":"35a5b153d095750e956842e837b63f78ebffc6b70ac5e9283ce94e3a771ccf17","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-fixed-features-label-budget","title":"读 LAB01：固定表示，只改变预算与读出","number":4},"sectionTitle":"同一表示，增加标签与改变读出是两种干预","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":"fixed-representation-label-budget-evidence","formulas":[],"previousBlock":"b-593b140d7f3d955b627d1096","nextBlock":null,"prerequisites":[{"id":"b-06954fd4d0092f9b923fe2e1","url":"#b-06954fd4d0092f9b923fe2e1","role":"section-title"},{"id":"b-108625889a2127e320f7573f","url":"#b-108625889a2127e320f7573f","role":"problem-context"}],"relatedBlocks":[{"id":"b-06954fd4d0092f9b923fe2e1","url":"#b-06954fd4d0092f9b923fe2e1","relation":"same-reasoning"},{"id":"b-1366c5a935817eadaa7a3763","url":"#b-1366c5a935817eadaa7a3763","relation":"same-reasoning"},{"id":"b-593b140d7f3d955b627d1096","url":"#b-593b140d7f3d955b627d1096","relation":"same-reasoning"}]},{"id":"b-41ae3bfa6f07a13ae06ca27c","type":"h2","scope":"h-i-adaptation-can-lose","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-41ae3bfa6f07a13ae06ca27c","content":"## 读 LAB02：按预定规则，接受迁移没有获胜","sha256":"131e4e5bf68d27c0a87b17912ecb9cf9c7cfe45f9e9e02f8cf01801b257569c8","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-adaptation-can-lose","title":"读 LAB02：按预定规则，接受迁移没有获胜","number":5},"sectionTitle":"读 LAB02：按预定规则，接受迁移没有获胜","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":null,"nextBlock":"b-c59621eec30528ae7290c040","prerequisites":[{"id":"b-c59621eec30528ae7290c040","url":"#b-c59621eec30528ae7290c040","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-c59621eec30528ae7290c040","type":"p","scope":"h-i-adaptation-can-lose","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-c59621eec30528ae7290c040","content":"共享起点与数据顺序，比较head、late、all以及scratch，按最低验证CE选择。","sha256":"4caaba56031c0e38796946ecc8c373b60ac9088b9d324e3c6253b2c2734eb85b","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-adaptation-can-lose","title":"读 LAB02：按预定规则，接受迁移没有获胜","number":5},"sectionTitle":"读 LAB02：按预定规则，接受迁移没有获胜","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-41ae3bfa6f07a13ae06ca27c","nextBlock":"b-cd14cbd7c2b83b54739fb2aa","prerequisites":[{"id":"b-41ae3bfa6f07a13ae06ca27c","url":"#b-41ae3bfa6f07a13ae06ca27c","role":"section-title"}],"relatedBlocks":[]},{"id":"b-cd14cbd7c2b83b54739fb2aa","type":"h3","scope":"adaptation-scope-and-negative-result","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-cd14cbd7c2b83b54739fb2aa","content":"### 解冻更多参数，不保证更好","sha256":"de37320369532b6670ed89017c0faef7d77284e9b25f9b3f2096d357574b7ad5","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-adaptation-can-lose","title":"读 LAB02：按预定规则，接受迁移没有获胜","number":5},"sectionTitle":"解冻更多参数，不保证更好","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":"adaptation-scope-and-negative-result","formulas":[],"previousBlock":"b-c59621eec30528ae7290c040","nextBlock":"b-4f0253438127d91b552927b4","prerequisites":[{"id":"b-41ae3bfa6f07a13ae06ca27c","url":"#b-41ae3bfa6f07a13ae06ca27c","role":"section-title"},{"id":"b-c59621eec30528ae7290c040","url":"#b-c59621eec30528ae7290c040","role":"problem-context"}],"relatedBlocks":[{"id":"b-4f0253438127d91b552927b4","url":"#b-4f0253438127d91b552927b4","relation":"same-reasoning"},{"id":"b-2caf8aab603b552f8df55f5a","url":"#b-2caf8aab603b552f8df55f5a","relation":"same-reasoning"},{"id":"b-54ebc0d74e8bf16f92911c7b","url":"#b-54ebc0d74e8bf16f92911c7b","relation":"same-reasoning"}]},{"id":"b-4f0253438127d91b552927b4","type":"p","scope":"adaptation-scope-and-negative-result","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-4f0253438127d91b552927b4","content":"LAB 02从同一十分类CNN出发比较head、late、all，并加入随机起点scratch。新任务仍是数字是否≥5；head只更新新头，late更新后部，all更新全网。三种迁移共享源checkpoint、新头初始化、数据顺序和训练轮数。","sha256":"1e251273badfddc47ff49a7a7de205d5a67f0ac0a8a7f192997585fd22737dc4","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-adaptation-can-lose","title":"读 LAB02：按预定规则，接受迁移没有获胜","number":5},"sectionTitle":"解冻更多参数，不保证更好","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":"adaptation-scope-and-negative-result","formulas":[],"previousBlock":"b-cd14cbd7c2b83b54739fb2aa","nextBlock":"b-2caf8aab603b552f8df55f5a","prerequisites":[{"id":"b-cd14cbd7c2b83b54739fb2aa","url":"#b-cd14cbd7c2b83b54739fb2aa","role":"section-title"},{"id":"b-c59621eec30528ae7290c040","url":"#b-c59621eec30528ae7290c040","role":"problem-context"}],"relatedBlocks":[{"id":"b-cd14cbd7c2b83b54739fb2aa","url":"#b-cd14cbd7c2b83b54739fb2aa","relation":"same-reasoning"},{"id":"b-2caf8aab603b552f8df55f5a","url":"#b-2caf8aab603b552f8df55f5a","relation":"same-reasoning"},{"id":"b-54ebc0d74e8bf16f92911c7b","url":"#b-54ebc0d74e8bf16f92911c7b","relation":"same-reasoning"}]},{"id":"b-2caf8aab603b552f8df55f5a","type":"p","scope":"adaptation-scope-and-negative-result","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-2caf8aab603b552f8df55f5a","content":"已有默认协议是256训练、128验证、4轮、Adam学习率0.002。保存的最低验证交叉熵为head 1.906、late 0.877、all 0.849、scratch 0.611。按预先确定的“最低验证CE”规则，这一次应选择scratch，而不是因为课程在讲迁移就偏爱迁移模型。","sha256":"a5879223894e532f5d6752f8496bc1e65b69436ef72aa56362e3642249ec484b","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-adaptation-can-lose","title":"读 LAB02：按预定规则，接受迁移没有获胜","number":5},"sectionTitle":"解冻更多参数，不保证更好","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":"adaptation-scope-and-negative-result","formulas":[],"previousBlock":"b-4f0253438127d91b552927b4","nextBlock":"b-54ebc0d74e8bf16f92911c7b","prerequisites":[{"id":"b-cd14cbd7c2b83b54739fb2aa","url":"#b-cd14cbd7c2b83b54739fb2aa","role":"section-title"},{"id":"b-c59621eec30528ae7290c040","url":"#b-c59621eec30528ae7290c040","role":"problem-context"}],"relatedBlocks":[{"id":"b-cd14cbd7c2b83b54739fb2aa","url":"#b-cd14cbd7c2b83b54739fb2aa","relation":"same-reasoning"},{"id":"b-4f0253438127d91b552927b4","url":"#b-4f0253438127d91b552927b4","relation":"same-reasoning"},{"id":"b-54ebc0d74e8bf16f92911c7b","url":"#b-54ebc0d74e8bf16f92911c7b","relation":"same-reasoning"}]},{"id":"b-54ebc0d74e8bf16f92911c7b","type":"p","scope":"adaptation-scope-and-negative-result","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-54ebc0d74e8bf16f92911c7b","content":"这个负结果有教学价值：迁移是一种可检验起点优势，不是身份保证。相同轮数并不等算力，相同学习率也未必给每种范围公平的调优机会。可进一步只改标签预算或位移，再事先确定新的验证协议；不能反复看同一测试集直到挑出喜欢的结果。","sha256":"393e153deb58af24c40e05420246665f58a55a9640a04cc5792c49c49ada9f90","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-adaptation-can-lose","title":"读 LAB02：按预定规则，接受迁移没有获胜","number":5},"sectionTitle":"解冻更多参数，不保证更好","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":"adaptation-scope-and-negative-result","formulas":[],"previousBlock":"b-2caf8aab603b552f8df55f5a","nextBlock":"b-5bf9e33ebfa002cdc0917340","prerequisites":[{"id":"b-cd14cbd7c2b83b54739fb2aa","url":"#b-cd14cbd7c2b83b54739fb2aa","role":"section-title"},{"id":"b-c59621eec30528ae7290c040","url":"#b-c59621eec30528ae7290c040","role":"problem-context"}],"relatedBlocks":[{"id":"b-cd14cbd7c2b83b54739fb2aa","url":"#b-cd14cbd7c2b83b54739fb2aa","relation":"same-reasoning"},{"id":"b-4f0253438127d91b552927b4","url":"#b-4f0253438127d91b552927b4","relation":"same-reasoning"},{"id":"b-2caf8aab603b552f8df55f5a","url":"#b-2caf8aab603b552f8df55f5a","relation":"same-reasoning"}]},{"id":"b-5bf9e33ebfa002cdc0917340","type":"h2","scope":"practice","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-5bf9e33ebfa002cdc0917340","content":"## 沿这个问题继续","sha256":"cf44fcc62782fb4f6bdc42c16c5187d57556a03cb7ce6065e7bd9c36d8e7d733","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-adaptation-can-lose","title":"读 LAB02：按预定规则，接受迁移没有获胜","number":5},"sectionTitle":"读 LAB02：按预定规则，接受迁移没有获胜","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-54ebc0d74e8bf16f92911c7b","nextBlock":"b-f914bc8ab6547bb3c0d49d82","prerequisites":[{"id":"b-cd14cbd7c2b83b54739fb2aa","url":"#b-cd14cbd7c2b83b54739fb2aa","role":"section-title"},{"id":"b-c59621eec30528ae7290c040","url":"#b-c59621eec30528ae7290c040","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-f914bc8ab6547bb3c0d49d82","type":"p","scope":"practice","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-f914bc8ab6547bb3c0d49d82","content":"基础路线选LAB 01；需要参数迁移再做LAB 02。XOR与域变化是解释某种失败时才打开的分支。","sha256":"0b7e2e05fe23f6994babd8e690eb3c977059e284334f8d8fff1dd3a50ea03e75","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-adaptation-can-lose","title":"读 LAB02：按预定规则，接受迁移没有获胜","number":5},"sectionTitle":"读 LAB02：按预定规则，接受迁移没有获胜","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-5bf9e33ebfa002cdc0917340","nextBlock":"b-8dd433a4b50b952d6e7cbbff","prerequisites":[{"id":"b-5bf9e33ebfa002cdc0917340","url":"#b-5bf9e33ebfa002cdc0917340","role":"section-title"},{"id":"b-c59621eec30528ae7290c040","url":"#b-c59621eec30528ae7290c040","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-8dd433a4b50b952d6e7cbbff","type":"h4","scope":"practice","url":"https://codingai-lec03.pages.dev/course/pages/l3-r2-p23.html#b-8dd433a4b50b952d6e7cbbff","content":"#### 按问题回查的讲解与短练习（4）","sha256":"4197798ce9a8ae0908c167483d0d164c827acc86fc87e2d6bbdf0430a3db5736","chapter":{"id":"I","title":"学习信号与表示"},"unit":{"id":"i-use-and-evaluate","title":"怎样判断表示支持了哪种使用方式？"},"page":{"id":"h-i-adaptation-can-lose","title":"读 LAB02：按预定规则，接受迁移没有获胜","number":5},"sectionTitle":"读 LAB02：按预定规则，接受迁移没有获胜","currentQuestion":"怎样判断表示支持了哪种使用方式？","sourceSlides":["l3-r2-p23"],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-f914bc8ab6547bb3c0d49d82","nextBlock":null,"prerequisites":[{"id":"b-5bf9e33ebfa002cdc0917340","url":"#b-5bf9e33ebfa002cdc0917340","role":"section-title"},{"id":"b-c59621eec30528ae7290c040","url":"#b-c59621eec30528ae7290c040","role":"problem-context"}],"relatedBlocks":[]}]}