{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"cf76bc49-7e9b-4f42-bee8-3050a9fb9feb","title":"智慧的疆界 从图灵机到人工智能","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787111778004","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"cf76bc49-7e9b-4f42-bee8-3050a9fb9feb","id":"cf76bc49-7e9b-4f42-bee8-3050a9fb9feb","uuid":"cf76bc49-7e9b-4f42-bee8-3050a9fb9feb","title":"智慧的疆界 从图灵机到人工智能","normalized_title":"智慧的疆界从图灵机到人工智能","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787111778004","isbns":["9787111778004","9787111695714"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":456,"navigation_url":"https://workshop.closeclaw.top/ai/book/cf76bc49-7e9b-4f42-bee8-3050a9fb9feb","title_url":"https://workshop.closeclaw.top/ai/title/%E6%99%BA%E6%85%A7%E7%9A%84%E7%96%86%E7%95%8C%20%E4%BB%8E%E5%9B%BE%E7%81%B5%E6%9C%BA%E5%88%B0%E4%BA%BA%E5%B7%A5%E6%99%BA%E8%83%BD","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/cf76bc49-7e9b-4f42-bee8-3050a9fb9feb/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/cf76bc49-7e9b-4f42-bee8-3050a9fb9feb/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/cf76bc49-7e9b-4f42-bee8-3050a9fb9feb","page_url":"https://workshop.closeclaw.top/api/ai/books/cf76bc49-7e9b-4f42-bee8-3050a9fb9feb/page","search_url":"https://workshop.closeclaw.top/api/ai/books/cf76bc49-7e9b-4f42-bee8-3050a9fb9feb/search"},"page":{"printed_page":203,"pdf_page":218,"physical_index":218,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"f8bda52424c7c451eaef26b65a21791e673690b52ca17b0949a18b9acb90d1d1"},"chapter":"内容简介","content":"在图 6-17 中，笔者随意画了三条划分两类邮件的直线，到底应该以哪条线为准呢？这些分界线当然不可以随意挑选，如图 6-17 右上角和左下角分别有一个代表新邮件的五角星，它们属于垃圾邮件还是非垃圾邮件，完全取决于我们选择了哪条线作为空间的分界线。可见分界线的选定对模型的判定结果是有直接影响的，不可能在满足训练集样例的约束下人为随意地选定一条就能符合需要。\n\n要解决这个问题，首先应该想办法增加训练集中的数据量，样例越多，在平面中形成的点越密集，对空间分界线的约束就越有力，如果周围布满了密密麻麻的点，那分界线可以随意腾挪的空间就很小了。但即使分界线可以腾挪的范围被约束得越来越小，只要它是一个空间，就还是能容纳无数条直线，仍然有无数种分界线方案可供选择。\n\n第 6 章 机器学习概览\n\n203","previous_page":202,"next_page":204}