{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"cd4f7678-cd9b-4971-bde0-e9ad46a6cc71","title":"人工智能与大数据技术导论","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787302517986","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"cd4f7678-cd9b-4971-bde0-e9ad46a6cc71","id":"cd4f7678-cd9b-4971-bde0-e9ad46a6cc71","uuid":"cd4f7678-cd9b-4971-bde0-e9ad46a6cc71","title":"人工智能与大数据技术导论","normalized_title":"人工智能与大数据技术导论","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787302517986","isbns":["9787302517986"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":490,"navigation_url":"https://workshop.closeclaw.top/ai/book/cd4f7678-cd9b-4971-bde0-e9ad46a6cc71","title_url":"https://workshop.closeclaw.top/ai/title/%E4%BA%BA%E5%B7%A5%E6%99%BA%E8%83%BD%E4%B8%8E%E5%A4%A7%E6%95%B0%E6%8D%AE%E6%8A%80%E6%9C%AF%E5%AF%BC%E8%AE%BA","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/cd4f7678-cd9b-4971-bde0-e9ad46a6cc71/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/cd4f7678-cd9b-4971-bde0-e9ad46a6cc71/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/cd4f7678-cd9b-4971-bde0-e9ad46a6cc71","page_url":"https://workshop.closeclaw.top/api/ai/books/cd4f7678-cd9b-4971-bde0-e9ad46a6cc71/page","search_url":"https://workshop.closeclaw.top/api/ai/books/cd4f7678-cd9b-4971-bde0-e9ad46a6cc71/search"},"page":{"printed_page":223,"pdf_page":239,"physical_index":239,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"1850e6c2139ce075e9745bc90fc54601ee15378eebe99372ff30cc49030bcc96"},"chapter":"第8章","content":"下面调用linear\\_regressor的train()函数来训练模型。训练步骤为100步：\n\n上面的lambda作为一个表达式，封装了my\\_input\\_fn()。\n\n在上面的例子中，出现了2个超参数。\n\n●steps:训练迭代的个数。每一步计算一批数据的误差，基于这个误差来修改模型的权重值（修改一次）。\n\nbatch size:一步中所使用的样本数量（样本的选择是随机的），比如SGD批处理大小为1。\n\n简单来说，上述两个数字的乘积是已训练样本的总数。\n\n8.2.4 评估模型\n\n在模型训练后，我们就可以使用一些数据来评估这个模型。下面定义一个预测函数：\n\n第8章 TensorFlow\n\n223","previous_page":222,"next_page":224}