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组件复用](/course/pages/l3-r2-p66.html)进入，不必先完成全部Lab。这个短练习把表示、定位和语言三条线带回同一个研究判断：测试划分是否对应未来使用条件？","sha256":"1f4bcfdfa11c57e857f7ff8a98cc147400605592b4432b7ecc4eaf80576e364d","chapter":{"id":"course","title":"全讲收束：你的“新样本”究竟新在哪里？"},"unit":{"id":"notebook-blocks/d1b4823894e14c65b471615f74146ee8","title":"全讲收束：你的“新样本”究竟新在哪里？"},"page":{"id":"reading-opening","title":"全讲收束：你的“新样本”究竟新在哪里？","number":1},"sectionTitle":"全讲收束：你的“新样本”究竟新在哪里？","currentQuestion":"全讲收束：你的“新样本”究竟新在哪里？","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-a68785322e7b4f40aad65125","nextBlock":"b-e0ae6e3f75044b089b086f90","prerequisites":[{"id":"b-a68785322e7b4f40aad65125","url":"#b-a68785322e7b4f40aad65125","role":"section-title"},{"id":"b-52e472e060c3ddeef3bf6cf0","url":"#b-52e472e060c3ddeef3bf6cf0","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-e0ae6e3f75044b089b086f90","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/d1b4823894e14c65b471615f74146ee8.html#b-e0ae6e3f75044b089b086f90","content":"先预测“记采集批次均值”和“只用x”的线性基线谁占优，再比较随机样本切分与整批次留出。两种划分均180/60，指标同为RMSE；改变的是测试问题。数据为12批次×20样本的合成构造，不是农业实测。[逐数结果与解释](/course/blocks/research-question-split-evidence.html)。","sha256":"0e9a651cd2b9975a59ea9ebccb4fcdd735d80833649f9ce3c6c1b69507e67453","chapter":{"id":"course","title":"全讲收束：你的“新样本”究竟新在哪里？"},"unit":{"id":"notebook-blocks/d1b4823894e14c65b471615f74146ee8","title":"全讲收束：你的“新样本”究竟新在哪里？"},"page":{"id":"reading-opening","title":"全讲收束：你的“新样本”究竟新在哪里？","number":1},"sectionTitle":"全讲收束：你的“新样本”究竟新在哪里？","currentQuestion":"全讲收束：你的“新样本”究竟新在哪里？","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-c779bd60fb00c1d86f36cbba","nextBlock":"b-a06dcaa517bc6b292676c05b","prerequisites":[{"id":"b-a68785322e7b4f40aad65125","url":"#b-a68785322e7b4f40aad65125","role":"section-title"},{"id":"b-52e472e060c3ddeef3bf6cf0","url":"#b-52e472e060c3ddeef3bf6cf0","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-a06dcaa517bc6b292676c05b","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/d1b4823894e14c65b471615f74146ee8.html#b-a06dcaa517bc6b292676c05b","content":"读完只需留下一个自己的具体问题：未来预测对象、新样本相对训练的变化、必须整组留出的单位、一个简单基线，以及能推翻当前解释的干预。先把本例批次偏置标准差3改成0提出预测，再考虑是否运行。原代码和2026-09-22保存输出保留。","sha256":"d826ab1040a9741d94bd43c6331c3e949fa8645b069c8e3b1829220250fb620b","chapter":{"id":"course","title":"全讲收束：你的“新样本”究竟新在哪里？"},"unit":{"id":"notebook-blocks/d1b4823894e14c65b471615f74146ee8","title":"全讲收束：你的“新样本”究竟新在哪里？"},"page":{"id":"reading-opening","title":"全讲收束：你的“新样本”究竟新在哪里？","number":1},"sectionTitle":"全讲收束：你的“新样本”究竟新在哪里？","currentQuestion":"全讲收束：你的“新样本”究竟新在哪里？","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-e0ae6e3f75044b089b086f90","nextBlock":"b-347ac82af1d24da8617e82ad","prerequisites":[{"id":"b-a68785322e7b4f40aad65125","url":"#b-a68785322e7b4f40aad65125","role":"section-title"},{"id":"b-52e472e060c3ddeef3bf6cf0","url":"#b-52e472e060c3ddeef3bf6cf0","role":"problem-context"}],"relatedBlocks":[]},{"id":"b-347ac82af1d24da8617e82ad","type":"p","scope":"document","url":"https://codingai-lec03.pages.dev/course/notebook-blocks/d1b4823894e14c65b471615f74146ee8.html#b-347ac82af1d24da8617e82ad","content":"这册不收纳其他主题的剩余材料。它的终点是形成可检验的评价设计；具体模型与训练继续回到所选的LAB01/02、LAB10、LAB13或LAB14。","sha256":"68aa3e55e3c12b62812bb38fd30207255a14ad6ac45328410b86bdc4ebd13a14","chapter":{"id":"course","title":"全讲收束：你的“新样本”究竟新在哪里？"},"unit":{"id":"notebook-blocks/d1b4823894e14c65b471615f74146ee8","title":"全讲收束：你的“新样本”究竟新在哪里？"},"page":{"id":"reading-opening","title":"全讲收束：你的“新样本”究竟新在哪里？","number":1},"sectionTitle":"全讲收束：你的“新样本”究竟新在哪里？","currentQuestion":"全讲收束：你的“新样本”究竟新在哪里？","sourceSlides":[],"knowledgeBlock":null,"formulas":[],"previousBlock":"b-a06dcaa517bc6b292676c05b","nextBlock":null,"prerequisites":[{"id":"b-a68785322e7b4f40aad65125","url":"#b-a68785322e7b4f40aad65125","role":"section-title"},{"id":"b-52e472e060c3ddeef3bf6cf0","url":"#b-52e472e060c3ddeef3bf6cf0","role":"problem-context"}],"relatedBlocks":[]}]}