{"id":295,"date":"2018-01-29T11:30:00","date_gmt":"2018-01-29T03:30:00","guid":{"rendered":"https:\/\/cms.ersinfotech.com\/boyidata\/2018\/01\/29\/%e3%80%90%e6%9c%ba%e5%99%a8%e5%ad%a6%e4%b9%a0%e7%ae%97%e6%b3%95%e3%80%91%e9%82%a3%e4%ba%9b%e4%bd%a0%e9%9c%80%e8%a6%81%e7%90%86%e8%a7%a3%e7%9a%84%e7%9f%a5%e8%af%86\/"},"modified":"2018-01-29T11:30:00","modified_gmt":"2018-01-29T03:30:00","slug":"%e3%80%90%e6%9c%ba%e5%99%a8%e5%ad%a6%e4%b9%a0%e7%ae%97%e6%b3%95%e3%80%91%e9%82%a3%e4%ba%9b%e4%bd%a0%e9%9c%80%e8%a6%81%e7%90%86%e8%a7%a3%e7%9a%84%e7%9f%a5%e8%af%86","status":"publish","type":"post","link":"https:\/\/cms.ersinfotech.com\/boyidata\/2018\/01\/29\/%e3%80%90%e6%9c%ba%e5%99%a8%e5%ad%a6%e4%b9%a0%e7%ae%97%e6%b3%95%e3%80%91%e9%82%a3%e4%ba%9b%e4%bd%a0%e9%9c%80%e8%a6%81%e7%90%86%e8%a7%a3%e7%9a%84%e7%9f%a5%e8%af%86\/","title":{"rendered":"\u3010\u673a\u5668\u5b66\u4e60\u7b97\u6cd5\u3011\u90a3\u4e9b\u4f60\u9700\u8981\u7406\u89e3\u7684\u77e5\u8bc6"},"content":{"rendered":"<p><strong><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">1.\u652f\u6301\u5411\u91cf\u673a\u7b80\u4ecb<\/span><\/strong><\/p>\n<section data-role=\"paragraph\" class=\"_135editor\" style=\"border: 0px none;\">\n<p><\/p>\n<p style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 1.5em;\"><strong><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">\u652f\u6301\u5411\u91cf\u673a<\/span><\/strong>\uff08Support Vector Machine,SVM\uff09\u662f\u673a\u5668\u5b66\u4e60\u4e2d\u4e00\u79cd\u5e38\u7528\u7684<strong><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">\u76d1\u7763\u5b66\u4e60<\/span><\/strong>\u7b97\u6cd5\uff0c\u5176\u4f18\u52bf\u4e3b\u8981\u8868\u73b0\u5728\u9002\u5408\u89e3\u51b3<strong><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">\u5c0f\u6837\u672c<\/span><\/strong>\u3001<strong><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">\u975e\u7ebf\u6027<\/span><\/strong>\u548c<strong><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">\u9ad8\u7ef4<\/span><\/strong>\u7b49\u5206\u7c7b\u95ee\u9898\uff0c\u5e76\u5177\u6709\u8f83\u5f3a\u7684\u63a8\u5e7f\u80fd\u529b\uff0c\u5728\u6587\u672c\u5206\u7c7b\u3001\u4eba\u8138\u8bc6\u522b\u548c\u8bed\u97f3\u6a21\u5f0f\u8bc6\u522b\u7b49\u9886\u57df\u90fd\u6709\u5e7f\u6cdb\u7684\u5e94\u7528\u3002\u201c\u652f\u6301\u5411\u91cf\u201d\u662f\u6307\u90a3\u4e9b\u5728\u95f4\u9694\u533a\u95f4\u8fb9\u7f18\u7684\u8bad\u7ec3\u6837\u672c\u70b9\uff0c\u8fd9\u4e9b\u70b9\u5728\u5206\u7c7b\u8fc7\u7a0b\u4e2d\u8d77\u51b3\u5b9a\u6027\u4f5c\u7528\u3002\u201c\u673a\u201d\u5b9e\u9645\u4e0a\u662f\u6307\u4e00\u4e2a\u7b97\u6cd5\uff0c\u628a\u7b97\u6cd5\u5f53\u6210\u4e00\u4e2a\u673a\u5668\u3002<\/p>\n<p style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal;\"><\/p>\n<p style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 1.5em;\">\u652f\u6301\u5411\u91cf\u673a\u5e38\u7528\u6765\u89e3\u51b3\u4e8c\u5206\u7c7b\u95ee\u9898\uff0c\u5176\u5b66\u4e60\u7b56\u7565\u662f\u901a\u8fc7\u5b66\u4e60\u4e00\u4e2a\u7ebf\u6027\u5206\u7c7b\u9762\u4f7f\u4e0d\u540c\u7c7b\u522b\u7684\u6837\u672c\u5728\u7279\u5f81\u7a7a\u95f4\u4e0a\u7684\u95f4\u9694\u6700\u5927\u5316\uff0c\u518d\u8f6c\u5316\u4e3a\u4e00\u4e2a\u51f8\u4e8c\u6b21\u89c4\u5212\u95ee\u9898\u6765\u6c42\u89e3\u3002\u66f4\u5f62\u8c61\u7684\u7406\u89e3\u53ef\u4ee5\u5c06\u4e24\u4e2a\u4e0d\u540c\u7c7b\u522b\u7684\u6837\u672c\u770b\u4f5c\u671d\u4e0d\u540c\u65b9\u5411\u884c\u9a76\u7684\u6c7d\u8f66\uff0c\u6211\u4eec\u9700\u8981\u5728\u8fd9\u4e9b\u6c7d\u8f66\u4e2d\u95f4\u5efa\u7acb\u4e00\u5757\u9694\u79bb\u5e26\u6765\u5c06\u5b83\u4eec\u5206\u5f00\u3002\u663e\u7136\uff0c\u5982\u679c\u53ef\u4ee5\u5c06\u9694\u79bb\u5e26\u7684\u9762\u79ef\u5efa\u5f97\u6700\u5927\uff0c\u90a3\u5c31\u53ef\u4ee5\u6b63\u786e\u65e0\u6b67\u4e49\u7684\u5c06\u4ed6\u4eec\u5206\u5f00\uff0c\u6240\u4ee5\u652f\u6301\u5411\u91cf\u673a\u7684\u76ee\u6807\u53ef\u4ee5\u8bf4\u662f\u5728<strong><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">\u7ea6\u675f\u6761\u4ef6\u4e0b\u6700\u5927\u5316\u4e24\u7c7b\u6837\u672c\u70b9\u7684\u95f4\u9694<\/span><\/strong>\u3002<\/p>\n<p style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal;\"><\/p>\n<p style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; text-align: center;\"><img src=\"https:\/\/mmbiz.qlogo.cn\/mmbiz_jpg\/X2FCjFI6BZibX5NNRWggwyWibfyeYC7dFuiaqmwbCjqtHrz0wJXeaibKeziatlql4ciaWd27upPWJQhoKC0JwELSOGicg\/0?wx_fmt=jpeg\" data-type=\"jpeg\"\/><\/p>\n<p><\/p>\n<p><strong style=\"white-space: normal;\"><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">2.\u7ebf\u6027SVM<\/span><\/strong><\/p>\n<p><\/p>\n<p style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 1.5em;\">\u5728\u5904\u7406\u975e\u7ebf\u6027\u95ee\u9898\u65f6\uff0c\u901a\u5e38\u4f1a\u5c06\u975e\u7ebf\u6027\u95ee\u9898\u8f6c\u5316\u4e3a\u7ebf\u6027\u95ee\u9898\u6765\u5904\u7406\u3002\u6211\u4eec\u5148\u9488\u5bf9<strong><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">\u7ebf\u6027SVM<\/span><\/strong>\u9032\u884c\u8aaa\u660e\uff0c\u8fdb\u884c\u8bf4\u660e\uff0c\u5bf9\u4e8e\u4e24\u7c7b\u4e0d\u540c\u7684\u6837\u672c\u70b9\uff0c\u5176\u7c7b\u522b\u53ef\u4ee5\u7528y=1\u6216-1\u6765\u8868\u793a\uff0c\u800c\u7ebf\u6027\u5206\u7c7b\u9762\u51fd\u6570\u53ef\u4ee5\u8868\u793a\u4e3a\uff1a<\/p>\n<p style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; text-align: center; line-height: 1.5em;\">f(x) = (w^T)*X+b = 0<\/p>\n<p style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 1.5em;\">\u5176\u4e2dw\u4e3a\u6743\u91cd\u5411\u91cf\u7cfb\u6570\uff0cb\u4e3a\u5e73\u9762\u504f\u79fb\u91cf\u3002\u901a\u8fc7\u6620\u5c04\u5173\u7cfb\uff0c\u5f53f(x) = (w^T)*X+b &gt; 0 \u65f6\uff0cy = 1\uff1b\u5f53f(x) = (w^T)*X+b &lt; 0\u65f6\uff0cy = -1\u3002\u6839\u636e\u8bad\u7ec3\u6837\u672c\u5f97\u5230\u8fd9\u4e24\u4e2a\u53c2\u6570\u7684\u503c\uff0c\u5c31\u53ef\u4ee5\u786e\u5b9a\u5206\u7c7b\u9762\uff0c\u8fdb\u800c\u80fd\u591f\u5bf9\u65b0\u8f93\u5165\u7684\u6837\u672c\u8fdb\u884c\u5206\u7c7b\u3002<\/p>\n<p style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 1.5em;\"><\/p>\n<p style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 1.5em;\">\u90a3\u6211\u4eec\u5982\u4f55\u6765\u6c42\u89e3\u8fd9\u4e24\u4e2a\u53c2\u6570\uff1f\u5982\u4e0b\u5de6\u56fe\u6240\u793a\uff0c\u6bcf\u4e00\u6761\u7ebf\u5bf9\u5206\u5f00\u56fe\u4e2d\u7684\u4e24\u7c7b\u6837\u672c\u90fd\u6709\u6548\uff0c\u4f46\u662f\u54ea\u4e00\u6761\u662f\u6700\u597d\u7684\u5462\uff1f\u524d\u9762\u8bf4\u8fc7\u4f7f\u4e24\u7c7b\u6837\u672c\u70b9\u95f4\u9694\u6700\u5927\u5316\u7684\u5206\u7c7b\u9762\u624d\u662f\u6700\u597d\u7684\u5206\u7c7b\u9762\uff0c\u6545\u9700\u8981\u5148\u627e\u5230<strong><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">\u6700\u5927\u95f4\u9694<\/span><\/strong>\u3002<\/p>\n<p style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal;\"><img src=\"https:\/\/mmbiz.qlogo.cn\/mmbiz_jpg\/X2FCjFI6BZibX5NNRWggwyWibfyeYC7dFuXs4jCO9ic24CpBbumKvpqfOhdibbt7Yh6MibPUrNra8RfQ66z4X9eeU7g\/0?wx_fmt=jpeg\" data-type=\"jpeg\"\/><\/p>\n<p style=\"color: inherit; font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 2em;\">\u7531\u4e8e<strong><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">\u51fd\u6570\u95f4\u9694\u7684\u53ef\u53d8\u5316\u6027\u548c\u51e0\u4f55\u95f4\u9694\u7684\u4e0d\u53d8\u884c<\/span><\/strong>\uff0c\u6837\u672c\u70b9\uff08xi,yi\uff09\u5230\u5230\u5206\u5272\u5e73\u9762(w,b)\u7684\u51fd\u6570\u95f4\u9694\u4e3a\uff1ar1 = Yi(w*Xi +b),\u51e0\u4f55\u95f4\u9694\u4e3ar2 = Yi(w*Xi +b)\/||w||,\u5373\u51fd\u6570\u95f4\u9694\u4e0e\u51e0\u4f55\u95f4\u9694\u7684\u5173\u7cfb\u4e3ar2 = r1\/||w||\u3002\u6211\u4eec\u6240\u8981\u6c42\u7684<strong><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">\u6700\u5927\u5316\u95f4\u9694<\/span><\/strong>\uff0c\u5373\u6c42Max r1\/||w||\u3002\u56e0\u4e3a\u51fd\u6570\u95f4\u9694\u7684\u503c\u4e0d\u4f1a\u5f71\u54cd\u6700\u4f18\u5316\u95ee\u9898\u7684\u89e3\uff0c\u6545\u53ef\u4ee5\u5047\u8bbe\u79bb\u5206\u79bb\u9762\u6700\u8fd1\u7684\u6837\u672c\u70b9\u5230\u5206\u79bb\u9762\u7684\u51fd\u6570\u95f4\u9694r1 = 1,\u5219\u5176\u4ed6\u6837\u672c\u70b9\u7684\u95f4\u9694\u90fd\u4e0d\u4f1a\u5c0f\u4e8e1\u3002\u540c\u65f6\u5c06\u76ee\u6807\u51fd\u6570\u8f6c\u5316\u4e3a\u7b49\u4ef7\u5f62\u5f0f\u6c42\u6700\u5c0f\u503c\uff0c\u5219\u76ee\u6807\u51fd\u6570\u548c\u7ea6\u675f\u6761\u4ef6\u53ef\u4ee5\u8868\u793a\u4e3a\uff1a<\/p>\n<p style=\"color: inherit; font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 2em; text-align: center;\"><img src=\"https:\/\/mmbiz.qlogo.cn\/mmbiz_jpg\/X2FCjFI6BZibX5NNRWggwyWibfyeYC7dFuzGET0ZQD38J8icfhpVwA3Iao8dn105OatZDDDUtL1OcxJlJOHM9qOjg\/0?wx_fmt=jpeg\" data-type=\"jpeg\"\/><\/p>\n<p><\/p>\n<p><strong style=\"white-space: normal;\"><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">3.\u51f8\u4e8c\u6b21\u89c4\u5212\u95ee\u9898\u6c42\u89e3<\/span><\/strong><\/p>\n<p><strong style=\"white-space: normal;\"><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\"><br \/><\/span><\/strong><\/p>\n<p style=\"color: inherit; font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 1.5em;\">\u76ee\u6807\u95ee\u9898\u4e3a\u51f8\u4e8c\u6b21\u89c4\u5212\u95ee\u9898\uff0c\u5b58\u5728\u5168\u5c40\u6700\u4f18\u89e3\uff0c\u5c06\u5176\u8f6c\u5316\u4e3a<strong><span style=\"font-family: \u5fae\u8f6f\u96c5\u9ed1, &quot;Microsoft YaHei&quot;;\">\u62c9\u683c\u6717\u65e5\u6c42\u6781\u503c<\/span><\/strong>\u95ee\u9898\uff0c\u5b9a\u4e49\u62c9\u683c\u6717\u65e5\u51fd\u6570\u4e3a\uff1a<\/p>\n<p style=\"color: inherit; font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 2em; text-align: center;\"><img src=\"https:\/\/mmbiz.qlogo.cn\/mmbiz_jpg\/X2FCjFI6BZibX5NNRWggwyWibfyeYC7dFuTUwW2tL4Njonoda8vw3rQ6prsJZZWHOhVPvtPog34yNDI2iauysxRrA\/0?wx_fmt=jpeg\" data-type=\"jpeg\"\/><\/p>\n<p style=\"color: inherit; font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 1.5em;\">\u5219\u95ee\u9898\u8f6c\u53d8\u4e3a\uff1a<\/p>\n<p style=\"color: inherit; font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 1.5em;\"><\/p>\n<p style=\"color: inherit; font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 1.5em; text-align: center;\"><img src=\"https:\/\/mmbiz.qlogo.cn\/mmbiz_jpg\/X2FCjFI6BZibX5NNRWggwyWibfyeYC7dFuq6koXFsDs5yl42NX8XhEwicibgWs0r3gZBK0y0iaQXGxib0FsZdiaNWx9yQ\/0?wx_fmt=jpeg\" data-ratio=\"0.2676056338028169\" data-w=\"213\" data-type=\"jpeg\" style=\"border-width: 0px; border-style: initial; border-color: initial;border:0px;\"\/><\/p>\n<p style=\"color: inherit; font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 1.5em;\"><\/p>\n<p style=\"color: inherit; font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 1.5em;\">\u7531\u4e8e\u5148\u5bf9a\u6c42\u504f\u5bfc\u5e76\u4ee4\u5176\u7b49\u4e8e0\uff0c\u4ee5\u6d88\u53bba\u6765\u7b80\u5316\u65b9\u7a0b\u5bf9\u6c42\u89e3w , b\u6ca1\u6709\u5e2e\u52a9\uff0c\u6240\u4ee5\u9700\u8981\u8fdb\u884c\u5bf9\u5076\u53d8\u5316\u3002\u56e0\u95ee\u9898\u6ee1\u8db3KKT\u6761\u4ef6\uff0c\u6545\u5c06\u539f\u95ee\u9898\u8f6c\u5316\u4e3a\u5176\u5bf9\u5076\u95ee\u9898\uff1a<\/p>\n<p style=\"color: inherit; font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 2em; text-align: center;\"><img src=\"https:\/\/mmbiz.qlogo.cn\/mmbiz_jpg\/X2FCjFI6BZibX5NNRWggwyWibfyeYC7dFuKxXhicosmTvS6Bm8iaicogC1tYCS5D3GzMw3XDzQMRp6Q5MaGTN1N4aiaA\/0?wx_fmt=jpeg\" data-type=\"jpeg\"\/><\/p>\n<p style=\"color: inherit; font-family: \u5fae\u8f6f\u96c5\u9ed1; white-space: normal; line-height: 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