{"id":21829,"date":"2024-08-22T10:01:36","date_gmt":"2024-08-22T02:01:36","guid":{"rendered":"https:\/\/aif.amtbbs.org\/?p=21829"},"modified":"2024-08-22T10:01:36","modified_gmt":"2024-08-22T02:01:36","slug":"%e5%bf%ab%e9%80%9f%e5%ad%a6%e4%b9%a0%e4%b8%80%e4%b8%aa%e7%ae%97%e6%b3%95%ef%bc%8c%e7%a5%9e%e7%bb%8f%e7%bd%91%e7%bb%9c","status":"publish","type":"post","link":"https:\/\/aif.amtbbs.org\/index.php\/2024\/08\/22\/21829\/","title":{"rendered":"\u5feb\u901f\u5b66\u4e60\u4e00\u4e2a\u7b97\u6cd5\uff0c\u795e\u7ecf\u7f51\u7edc"},"content":{"rendered":"<div><img data-dominant-color=\"c2c4c8\" data-has-transparency=\"false\" style=\"--dominant-color: #c2c4c8;\" loading=\"lazy\" decoding=\"async\" class=\"not-transparent alignnone size-full wp-image-21831\" src=\"https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/08\/f17c2c691c1b653ad817296e58cafb25258a43-300x167-1.jpg\" width=\"300\" height=\"167\" alt=\"\" srcset=\"https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/08\/f17c2c691c1b653ad817296e58cafb25258a43-300x167-1.jpg 300w, https:\/\/aiforumimage.oss-cn-shanghai.aliyuncs.com\/wp-content\/uploads\/2024\/08\/f17c2c691c1b653ad817296e58cafb25258a43-300x167-1-150x84.jpg 150w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/div>\n<div><\/div>\n<div class=\"article-desc\">\u6bcf\u4e2a\u795e\u7ecf\u5143\u53ef\u4ee5\u63a5\u6536\u8f93\u5165\uff0c\u5bf9\u5176\u8fdb\u884c\u5904\u7406\uff0c\u5e76\u4ea7\u751f\u8f93\u51fa\u3002\u8fd9\u4e9b\u795e\u7ecf\u5143\u901a\u8fc7\u79f0\u4e3a \u201c\u6743\u91cd\u201d \u7684\u53c2\u6570\u76f8\u4e92\u8fde\u63a5\uff0c\u6743\u91cd\u51b3\u5b9a\u4e86\u4e00\u4e2a\u795e\u7ecf\u5143\u7684\u8f93\u51fa\u5982\u4f55\u5f71\u54cd\u53e6\u4e00\u4e2a\u795e\u7ecf\u5143\u7684\u6fc0\u6d3b\u72b6\u6001\u3002<\/div>\n<div id=\"postspictures\" class=\"article-content\">\n<div id=\"container\" class=\"container am-engine\" data-v-1d7a5742=\"\" data-element=\"root\">\n<p>\u5927\u5bb6\u597d\uff0c\u6211\u662f\u5c0f\u5bd2\u3002<\/p>\n<p>\u4eca\u5929\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u4e00\u4e2a\u8d85\u5f3a\u7684\u7b97\u6cd5\u6a21\u578b\uff0c\u795e\u7ecf\u7f51\u7edc\u3002<\/p>\n<p>\u795e\u7ecf\u7f51\u7edc\u662f\u4e00\u79cd\u7531\u5927\u91cf\u7b80\u5355\u3001\u76f8\u4e92\u8fde\u63a5\u7684\u5355\u5143\uff08\u79f0\u4e3a\u201c\u795e\u7ecf\u5143\u201d\uff09\u7ec4\u6210\u7684\u8ba1\u7b97\u6a21\u578b\uff0c\u53d7\u5230\u4eba\u8111\u7ed3\u6784\u7684\u542f\u53d1\u3002<\/p>\n<p>\u6bcf\u4e2a\u795e\u7ecf\u5143\u53ef\u4ee5\u63a5\u6536\u8f93\u5165\uff0c\u5bf9\u5176\u8fdb\u884c\u5904\u7406\uff0c\u5e76\u4ea7\u751f\u8f93\u51fa\u3002\u8fd9\u4e9b\u795e\u7ecf\u5143\u901a\u8fc7\u79f0\u4e3a \u201c\u6743\u91cd\u201d \u7684\u53c2\u6570\u76f8\u4e92\u8fde\u63a5\uff0c\u6743\u91cd\u51b3\u5b9a\u4e86\u4e00\u4e2a\u795e\u7ecf\u5143\u7684\u8f93\u51fa\u5982\u4f55\u5f71\u54cd\u53e6\u4e00\u4e2a\u795e\u7ecf\u5143\u7684\u6fc0\u6d3b\u72b6\u6001\u3002<\/p>\n<p><img decoding=\"async\" title=\"\u56fe\u7247\" src=\"https:\/\/s5.51cto.com\/oss\/202408\/22\/d4093720860801909259621aed6febabaaa9c3.png\" alt=\"\u56fe\u7247\" data-type=\"block\" \/><span class=\"data-image-title\">\u56fe\u7247<\/span><\/p>\n<h3>\u795e\u7ecf\u7f51\u7edc\u7684\u7ec4\u6210\u90e8\u5206<\/h3>\n<h4>\u795e\u7ecf\u5143<\/h4>\n<p>\u795e\u7ecf\u5143\u662f\u795e\u7ecf\u7f51\u7edc\u7684\u57fa\u672c\u5355\u5143\uff0c\u6bcf\u4e2a\u795e\u7ecf\u5143\u63a5\u6536\u8f93\u5165\uff0c\u5bf9\u8f93\u5165\u8fdb\u884c\u52a0\u6743\u6c42\u548c\uff0c\u518d\u901a\u8fc7\u4e00\u4e2a\u6fc0\u6d3b\u51fd\u6570\u751f\u6210\u8f93\u51fa\u3002<\/p>\n<h4>\u5c42<\/h4>\n<p><img decoding=\"async\" title=\"\u56fe\u7247\" src=\"https:\/\/s8.51cto.com\/oss\/202408\/22\/597bc3756f3399a89587564abad9ede95e1c90.png\" alt=\"\u56fe\u7247\" data-type=\"block\" \/><span class=\"data-image-title\">\u56fe\u7247<\/span><\/p>\n<ul data-id=\"u738a58b-anJlkGVo\">\n<li data-id=\"ld70c578-nNbHJ7Xh\">\u8f93\u5165\u5c42\uff1a\u662f\u7f51\u7edc\u63a5\u6536\u5916\u90e8\u6570\u636e\u7684\u7b2c\u4e00\u5c42\uff0c\u6bcf\u4e2a\u8f93\u5165\u4ee3\u8868\u4e0d\u540c\u7684\u7279\u5f81\u3002<\/li>\n<li data-id=\"ld70c578-lMSEkBlq\">\u9690\u85cf\u5c42\uff1a\u7f51\u7edc\u4e2d\u4e00\u4e2a\u6216\u591a\u4e2a\u4e2d\u95f4\u5c42\uff0c\u8fd9\u91cc\u8fdb\u884c\u6570\u636e\u7684\u8f6c\u6362\u548c\u7279\u5f81\u7684\u62bd\u8c61\u3002<\/li>\n<li data-id=\"ld70c578-IicdDHao\">\u8f93\u51fa\u5c42\uff1a\u7f51\u7edc\u7684\u6700\u540e\u4e00\u5c42\uff0c\u8d1f\u8d23\u4ea7\u751f\u8f93\u51fa\uff0c\u5982\u5206\u7c7b\u7684\u6807\u7b7e\u6216\u8005\u56de\u5f52\u95ee\u9898\u7684\u6570\u503c\u9884\u6d4b\u3002<\/li>\n<\/ul>\n<h4>\u6743\u91cd\u548c\u504f\u7f6e<\/h4>\n<ul data-id=\"u738a58b-rm6m9rLV\">\n<li data-id=\"ld70c578-4K6rKVF7\">\u6743\u91cd\uff1a\u8fde\u63a5\u7f51\u7edc\u4e2d\u795e\u7ecf\u5143\u7684\u53c2\u6570\uff0c\u51b3\u5b9a\u4e86\u8f93\u5165\u4fe1\u53f7\u5728\u7f51\u7edc\u4e2d\u4f20\u9012\u7684\u5f3a\u5ea6\u548c\u5f71\u54cd\u3002<\/li>\n<li data-id=\"ld70c578-xEoKcfv8\">\u504f\u7f6e\uff1a\u4e00\u79cd\u7279\u6b8a\u7684\u6743\u91cd\uff0c\u4e0e\u6bcf\u5c42\u7684\u6bcf\u4e2a\u795e\u7ecf\u5143\u5173\u8054\uff0c\u53ef\u4ee5\u8c03\u6574\u6fc0\u6d3b\u51fd\u6570\u7684\u8f93\u5165\uff0c\u4ece\u800c\u63a7\u5236\u795e\u7ecf\u5143\u7684\u6fc0\u6d3b\u65b9\u5f0f\u3002<\/li>\n<\/ul>\n<h4>\u6fc0\u6d3b\u51fd\u6570<\/h4>\n<ul data-id=\"u738a58b-LngsO3Op\">\n<li data-id=\"ld70c578-Xh48LDWF\">\u6fc0\u6d3b\u51fd\u6570\u4e3a\u7f51\u7edc\u5f15\u5165\u975e\u7ebf\u6027\uff0c\u4f7f\u5176\u80fd\u591f\u6355\u6349\u590d\u6742\u7684\u6a21\u5f0f\u3002<\/li>\n<li data-id=\"ld70c578-9kphWD4P\">\u5e38\u89c1\u7684\u6fc0\u6d3b\u51fd\u6570\u5305\u62ec Sigmoid\u3001Tanh\u3001ReLU\u3001Leaky ReLU\u548cSELU\u3002<\/li>\n<\/ul>\n<h4>\u4f18\u5316\u5668\uff08Optimizer\uff09<\/h4>\n<p>\u4f18\u5316\u5668\u7528\u4e8e\u66f4\u65b0\u7f51\u7edc\u7684\u6743\u91cd\u548c\u504f\u7f6e\uff0c\u76ee\u7684\u662f\u51cf\u5c11\u9884\u6d4b\u8f93\u51fa\u548c\u5b9e\u9645\u8f93\u51fa\u4e4b\u95f4\u7684\u8bef\u5dee\u3002<\/p>\n<p>\u5e38\u7528\u7684\u4f18\u5316\u7b97\u6cd5\u5305\u62ec\u68af\u5ea6\u4e0b\u964d\u3001\u968f\u673a\u68af\u5ea6\u4e0b\u964d\uff08SGD\uff09\u3001Adam\u7b49\u3002<\/p>\n<h4>\u635f\u5931\u51fd\u6570\uff08Loss Function\uff09<\/h4>\n<p>\u635f\u5931\u51fd\u6570\u8861\u91cf\u7f51\u7edc\u9884\u6d4b\u7ed3\u679c\u4e0e\u5b9e\u9645\u7ed3\u679c\u7684\u5dee\u5f02\uff0c\u662f\u8bad\u7ec3\u8fc7\u7a0b\u4e2d\u4f18\u5316\u7684\u76ee\u6807\u3002<\/p>\n<p>\u5e38\u89c1\u7684\u635f\u5931\u51fd\u6570\u6709\u5747\u65b9\u8bef\u5dee\uff08MSE\uff09\u3001\u4ea4\u53c9\u71b5\u635f\u5931\u7b49\u3002<\/p>\n<h3>\u5efa\u7acb\u4f60\u7684\u7b2c\u4e00\u4e2a\u795e\u7ecf\u7f51\u7edc<\/h3>\n<p>\u8ba9\u6211\u4eec\u4e3a\u4e00\u4e2a\u975e\u5e38\u57fa\u672c\u7684\u6570\u636e\u96c6\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u795e\u7ecf\u7f51\u7edc\u3002<\/p>\n<p>\u6211\u4eec\u5c06\u4f7f\u7528 sklearn.datasets \u7684 make_classification \u51fd\u6570\u6765\u751f\u6210\u5408\u6210\u7684\u4e8c\u5143\u5206\u7c7b\u6570\u636e\u96c6\u3002<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_0\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-sql\" tabindex=\"0\"><code class=\"language-sql\"><span class=\"token keyword\">import<\/span> numpy <span class=\"token keyword\">as<\/span> np\r\n<span class=\"token keyword\">import<\/span> matplotlib<span class=\"token punctuation\">.<\/span>pyplot <span class=\"token keyword\">as<\/span> plt\r\n<span class=\"token keyword\">from<\/span> sklearn<span class=\"token punctuation\">.<\/span>datasets <span class=\"token keyword\">import<\/span> make_classification\r\n<span class=\"token keyword\">from<\/span> sklearn<span class=\"token punctuation\">.<\/span>model_selection <span class=\"token keyword\">import<\/span> train_test_split\r\n<span class=\"token keyword\">import<\/span> tensorflow <span class=\"token keyword\">as<\/span> tf\r\n<span class=\"token keyword\">from<\/span> tensorflow<span class=\"token punctuation\">.<\/span>keras <span class=\"token keyword\">import<\/span> layers<span class=\"token punctuation\">,<\/span> models\r\n\r\nX<span class=\"token punctuation\">,<\/span> y <span class=\"token operator\">=<\/span> make_classification<span class=\"token punctuation\">(<\/span>n_samples<span class=\"token operator\">=<\/span><span class=\"token number\">1000<\/span><span class=\"token punctuation\">,<\/span> n_features<span class=\"token operator\">=<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> n_classes<span class=\"token operator\">=<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> n_clusters_per_class<span class=\"token operator\">=<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> n_redundant<span class=\"token operator\">=<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> random_state<span class=\"token operator\">=<\/span><span class=\"token number\">42<\/span><span class=\"token punctuation\">)<\/span><\/code><\/pre>\n<ul id=\"code_id_0\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<li>6.<\/li>\n<li>7.<\/li>\n<li>8.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u63a5\u4e0b\u6765\uff0c\u5c06\u6570\u636e\u96c6\u62c6\u5206\u4e3a\u8bad\u7ec3\u96c6\u548c\u6d4b\u8bd5\u96c6\u3002<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_1\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-sql\" tabindex=\"0\"><code class=\"language-sql\">X_train<span class=\"token punctuation\">,<\/span> X_test<span class=\"token punctuation\">,<\/span> y_train<span class=\"token punctuation\">,<\/span> y_test <span class=\"token operator\">=<\/span> train_test_split<span class=\"token punctuation\">(<\/span>X<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">,<\/span> test_size<span class=\"token operator\">=<\/span><span class=\"token number\">0.2<\/span><span class=\"token punctuation\">,<\/span> random_state<span class=\"token operator\">=<\/span><span class=\"token number\">42<\/span><span class=\"token punctuation\">)<\/span><\/code><\/pre>\n<ul id=\"code_id_1\" class=\"pre-numbering\">\n<li>1.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u7136\u540e\u6211\u4eec\u5b9a\u4e49\u4e00\u4e2a\u795e\u7ecf\u7f51\u7edc\u6a21\u578b\u5e76\u8bad\u7ec3\u3002<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_2\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-sql\" tabindex=\"0\"><code class=\"language-sql\">model <span class=\"token operator\">=<\/span> models<span class=\"token punctuation\">.<\/span>Sequential<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\r\nmodel<span class=\"token punctuation\">.<\/span><span class=\"token keyword\">add<\/span><span class=\"token punctuation\">(<\/span>layers<span class=\"token punctuation\">.<\/span>Dense<span class=\"token punctuation\">(<\/span>units<span class=\"token operator\">=<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> activatinotallow<span class=\"token operator\">=<\/span><span class=\"token string\">'sigmoid'<\/span><span class=\"token punctuation\">,<\/span> input_shape<span class=\"token operator\">=<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\r\n\r\nmodel<span class=\"token punctuation\">.<\/span>compile<span class=\"token punctuation\">(<\/span>optimizer<span class=\"token operator\">=<\/span><span class=\"token string\">'adam'<\/span><span class=\"token punctuation\">,<\/span> loss<span class=\"token operator\">=<\/span><span class=\"token string\">'binary_crossentropy'<\/span><span class=\"token punctuation\">,<\/span> metrics<span class=\"token operator\">=<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">'accuracy'<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span>\r\nhistory <span class=\"token operator\">=<\/span> model<span class=\"token punctuation\">.<\/span>fit<span class=\"token punctuation\">(<\/span>X_train<span class=\"token punctuation\">,<\/span> y_train<span class=\"token punctuation\">,<\/span> epochs<span class=\"token operator\">=<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">,<\/span> batch_size<span class=\"token operator\">=<\/span><span class=\"token number\">32<\/span><span class=\"token punctuation\">,<\/span> validation_split<span class=\"token operator\">=<\/span><span class=\"token number\">0.2<\/span><span class=\"token punctuation\">)<\/span><\/code><\/pre>\n<ul id=\"code_id_2\" class=\"pre-numbering\">\n<li>1.<\/li>\n<li>2.<\/li>\n<li>3.<\/li>\n<li>4.<\/li>\n<li>5.<\/li>\n<\/ul>\n<div class=\"toolbar\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\u6700\u540e\uff0c\u6211\u4eec\u5728\u6d4b\u8bd5\u96c6\u4e0a\u8bc4\u4f30\u6a21\u578b\u3002<\/p>\n<div>\n<div class=\"hljs-cto\">\n<div class=\"hljs-cto\"><button class=\"copy_btn disable\" data-clipboard-target=\"#code_id_3\">\u590d\u5236<\/button><\/p>\n<div class=\"code-toolbar\">\n<pre class=\"has-pre-numbering language-sql\" tabindex=\"0\"><code class=\"language-sql\">test_loss<span class=\"token punctuation\">,<\/span> test_accuracy <span class=\"token operator\">=<\/span> model<span class=\"token punctuation\">.<\/span>evaluate<span class=\"token punctuation\">(<\/span>X_test<span class=\"token punctuation\">,<\/span> y_test<span class=\"token punctuation\">)<\/span>\r\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>f<span class=\"token string\">'Test Accuracy: {test_accuracy * 100:.2f}%'<\/span><span class=\"token punctuation\">)<\/span><\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_21829\" class=\"pvc_stats total_only  \" data-element-id=\"21829\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" version=\"1.0\" viewBox=\"0 0 502 315\" preserveAspectRatio=\"xMidYMid meet\"><g transform=\"translate(0,332) scale(0.1,-0.1)\" fill=\"\" stroke=\"none\"><path d=\"M2394 3279 l-29 -30 -3 -207 c-2 -182 0 -211 15 -242 39 -76 157 -76 196 0 15 31 17 60 15 243 l-3 209 -33 29 c-26 23 -41 29 -80 29 -41 0 -53 -5 -78 -31z\"\/><path d=\"M3085 3251 c-45 -19 -58 -50 -96 -229 -47 -217 -49 -260 -13 -295 52 -53 146 -42 177 20 16 31 87 366 87 410 0 70 -86 122 -155 94z\"\/><path d=\"M1751 3234 c-13 -9 -29 -31 -37 -50 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class=\"pvc_clear\"><\/div>\n","protected":false},"author":56,"featured_media":21831,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,17,80],"tags":[1269],"class_list":["post-21829","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-23","category-17","category-80","tag-1269"],"_links":{"self":[{"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/posts\/21829","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/users\/56"}],"replies":[{"embeddable":true,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/comments?post=21829"}],"version-history":[{"count":1,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/posts\/21829\/revisions"}],"predecessor-version":[{"id":21832,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/posts\/21829\/revisions\/21832"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/media\/21831"}],"wp:attachment":[{"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/media?parent=21829"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/categories?post=21829"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aif.amtbbs.org\/index.php\/wp-json\/wp\/v2\/tags?post=21829"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}