{"id":291,"date":"2018-01-29T12:02:04","date_gmt":"2018-01-29T04:02:04","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%e5%a6%82%e4%bd%95%e9%81%8b%e7%94%a8svm%e8%bf%9b%e8%a1%8c%e6%ad%8c%e6%9b%b2%e5%88%86%e7%b1%bb\/"},"modified":"2018-01-29T12:02:04","modified_gmt":"2018-01-29T04:02:04","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%e5%a6%82%e4%bd%95%e9%81%8b%e7%94%a8svm%e8%bf%9b%e8%a1%8c%e6%ad%8c%e6%9b%b2%e5%88%86%e7%b1%bb","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%e5%a6%82%e4%bd%95%e9%81%8b%e7%94%a8svm%e8%bf%9b%e8%a1%8c%e6%ad%8c%e6%9b%b2%e5%88%86%e7%b1%bb\/","title":{"rendered":"\u3010\u673a\u5668\u5b66\u4e60\u7b97\u6cd5\u3011\u5982\u4f55\u904b\u7528SVM\u8fdb\u884c\u6b4c\u66f2\u5206\u7c7b"},"content":{"rendered":"
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\u63a2\u8ba8\u975e\u7ebf\u6027SVM,\u4e86\u89e3\u6838\u51fd\u6570\u7684\u6982\u5ff5\uff0c\u5e76\u5229\u7528Python sklearn\u5e93\u4e2d\u7684SVM\u6a21\u5757\u5bf9\u4e0d\u540c\u98ce\u683c\u7684\u6b4c\u66f2\u8fdb\u884c\u5206\u7c7b\uff08\u8bed\u6599\u53ca.Py\u4ee3\u7801\u4e0b\u8f7d\u65b9\u5f0f\u89c1\u6587\u7ae0\u672b\u5904\uff09\u3002<\/span><\/p>\n


<\/span><\/p>\n

1.\u975e\u7ebf\u6027SVM<\/span><\/strong><\/p>\n

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\u6b64\u524d\u6211\u4eec\u63d0\u8fc7SVM\u5904\u7406\u975e\u7ebf\u6027\u95ee\u9898\u65f6\u9700\u8981\u8f6c\u5316\u4e3a\u7ebf\u6027\u95ee\u9898\uff0c\u518d\u7528\u7ebf\u6027SVM\u7684\u7b97\u6cd5\u8fdb\u884c\u6c42\u89e3\uff0c\u6240\u4ee5\u5b9e\u8d28\u4e0a<\/span>SVM\u53ea\u80fd\u5904\u7406\u7ebf\u6027\u95ee\u9898<\/span><\/strong>\u3002\u8fd9\u91cc\u5c06\u975e\u7ebf\u6027\u95ee\u9898\u8f6c\u5316\u4e3a\u7ebf\u6027\u95ee\u9898\u7684\u65b9\u6cd5\u4e3b\u8981\u662f\u501f\u52a9\u6838\u51fd\u6570\u5c06<\/span>\u4f4e<\/span><\/strong>\u7ef4<\/span><\/strong>\u7684\u6570\u636e\u6620\u5c04\u5230<\/span>\u9ad8\u7ef4<\/span><\/strong>\u7a7a\u95f4\u4e2d\uff0c\u4f7f\u5f97\u6570\u636e\u5728\u9ad8\u7ef4\u7a7a\u95f4\u4e2d\u80fd\u591f\u7ebf\u6027\u53ef\u5206\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u56fe\u5de6\u7684\u6837\u672c\u70b9\u65e0\u6cd5\u4f7f\u7528\u76f4\u7ebf\u5206\u7c7b\u9762\u6765\u5212\u5206\uff0c\u4f46\u7ecf\u8fc7\u6620\u5c04\u53d8\u6210\u53f3\u56fe\u7684\u5f62\u5f0f\u540e\u7ebf\u6027\u53ef\u5206\u3002<\/span><\/p>\n

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\u8fd9\u79cd\u53d8\u6362\u53ef\u4ee5\u7406\u89e3\u4e3a<\/span><\/span>\u5f15\u5165\u4e86\u4e00\u4e2a\u975e\u7ebf\u6027\u53d8\u6362\u51fd\u6570\u2205\uff08\u00b7\uff09\u5c06R^n\u7a7a\u95f4\u7684\u6837\u672cX\u6620\u5c04\u5230R^m\u7a7a\u95f4,\u5176\u4e2dn<<m<\/span><\/strong>\u3002\u53ef\u4ee5\u770b\u5230\u56fe\u5de6\u5176\u5b9e\u53ef\u4ee5\u7528\u4e00\u4e2a\u4e8c\u6b21\u66f2\u7ebf\u6765\u8fdb\u884c\u5212\u5206\uff0c\u65b9\u7a0b\u8fd0\u7b97\u5f0f\u53ef\u4ee5\u5199\u4e3a\uff1a<\/span><\/p>\n

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\u901a\u8fc7\u6784\u9020\u4e00\u4e2a5\u7ef4\u7a7a\u95f4\uff0c\u4ee4<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n

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\u5219\u5728\u65b0\u7684\u7a7a\u95f4\u4e2d\u5206\u7c7b\u65b9\u7a0b\u53ef\u4ee5\u5199\u4e3a\uff1a<\/span><\/p>\n
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\u4ece\u800c\u53d8\u6210\u4e00\u4e2a\u7ebf\u6027\u53ef\u5206\u7684\u95ee\u9898\uff0c\u6b64\u65f6<\/span><\/p>\n

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\u7136\u800c\u968f\u7740\u7ef4\u5ea6\u7684\u589e\u52a0\uff0c\u2205\uff08\u00b7\uff09\u51fd\u6570\u7684\u8ba1\u7b97\u662f\u975e\u5e38\u56f0\u96be\u7684\uff0c\u751a\u81f3\u4f1a\u5bfc\u81f4\u7ef4\u6570\u707e\u96be\uff0c\u6545\u9700\u8981\u5f15\u5165<\/span>\u6838\u51fd\u6570<\/span><\/strong>\u3002\u6838\u51fd\u6570\u80fd\u591f\u63a5\u6536\u4f4e\u7ef4\u7a7a\u95f4\u7684\u5411\u91cf\uff0c\u8ba1\u7b97\u51fa\u7ecf\u8fc7\u53d8\u6362\u540e\u5728\u9ad8\u7ef4\u7a7a\u95f4\u91cc\u7684\u5411\u91cf\u5185\u79ef\u503c\uff0c\u800c\u4e0d\u7528\u5148\u6620\u5c04\u5230\u9ad8\u7ef4\u7a7a\u95f4\u4e2d\u518d\u8fdb\u884c\u5185\u79ef\u8ba1\u7b97\uff0c\u4e0d\u7528\u663e\u793a\u7684\u5199\u51fa\u6620\u5c04\u540e\u7684\u7ed3\u679c\u3002\u5173\u4e8e\u6838\u51fd\u6570\u7684\u9009\u62e9\uff0c\u867d\u7136\u6709\u4e00\u4e9b\u7ecf\u9a8c\u7684\u7ed3\u8bba\uff0c\u4f46\u7f3a\u4e4f\u6bd4\u8f83\u7cfb\u7edf\u6709\u6548\u7684\u65b9\u6cd5\uff0c\u6545\u4e0d\u8fdb\u884c\u8be6\u7ec6\u7684\u8ba8\u8bba\uff0c\u591a\u6570\u60c5\u51b5\u4e0b\u8fd8\u662f\u901a\u8fc7\u591a\u6b21\u5b9e\u9a8c\u6d4b\u8bd5\u7684\u7ed3\u679c\u6765\u9009\u62e9\u6700\u4f18\u7684\u6838\u51fd\u6570\u3002\u5e38\u7528\u7684\u6838\u51fd\u6570\u4e3b\u8981\u6709\uff1a<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n

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\u52a0\u5165\u6838\u51fd\u6570\u540e\u5206\u7c7b\u5224\u522b\u51fd\u6570\u8868\u793a\u4e3a\uff1a<\/span><\/p>\n

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\u6839\u636e\u4e0a\u8282\u8bb2\u5230\u7684\u62c9\u683c\u6717\u65e5\u65b9\u7a0b\u5f97\u5230\u5bf9\u5076\u76ee\u6807\u51fd\u6570\u4e3a\uff1a<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n

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C\u4e3a\u52a0\u5165\u7684\u60e9\u7f5a\u56e0\u6570\uff0c\u8868\u793a\u5bf9\u79bb\u7fa4\u70b9\u7684\u91cd\u89c6\u7a0b\u5ea6\u3002\u6700\u540e<\/span>\u6839\u636e\u7ebf\u6027SVM\u7684\u7b97\u6cd5\u5bf9\u76ee\u6807\u51fd\u6570\u8fdb\u884c\u6c42\u89e3<\/span><\/strong>\uff0c\u53ef\u4ee5\u5f97\u5230\u5206\u7c7b\u5e73\u9762\u7684\u51fd\u6570\u3002<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n

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\u5f53\u7136\u672c\u6587\u53ea\u662f\u7528\u901a\u4fd7\u6d45\u663e\u7684\u65b9\u5f0f\u5bf9SVM\u7684\u77e5\u8bc6\u8fdb\u884c\u4e86\u68b3\u7406\uff0c\u5982\u679c\u9700\u8981\u66f4\u6df1\u5c42\u7684\u638c\u63e1\u6838\u51fd\u6570\u7684\u8fd0\u7528\u548cSVM\u7684\u539f\u7406\uff0c\u9700\u8981\u5927\u5bb6\u7ee7\u7eed\u63a2\u7d22\uff0c\u76f8\u4fe1\u901a\u8fc7\u521d\u6b65\u7684\u5b66\u4e60\u5927\u5bb6\u80fd\u591f\u5bf9SVM\u7b97\u6cd5\u6709\u4e2a\u57fa\u672c\u7684\u8ba4\u8bc6\u3002\u540c\u65f6\u975e\u5e38\u611f\u8c22\u5728\u7f51\u7edc\u4e2d\u5bf9\u8be5\u7b97\u6cd5\u65e0\u79c1\u5206\u4eab\u7684\u670b\u53cb\uff08\u5305\u62ec\u6587\u7ae0\u3001\u56fe\u7247\u6216\u8457\u4f5c\u7b49\uff09\uff0c\u82e5\u5185\u5bb9\u4e0a\u6709\u5192\u72af\u7684\u5730\u65b9\u8bf7\u8054\u7cfb\u6211\u4eec\u4fee\u6539\u6216\u5220\u9664\u3002<\/span><\/p>\n

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\u4e0b\u9762\u6211\u4eec\u5c06\u5206\u4eab\u4e00\u4e2a\u7b80\u5355\u7684\u4f7f\u7528SVM\u7b97\u6cd5\u5bf9\u6b4c\u66f2\u8fdb\u884c\u5206\u7c7b\u7684\u5b9e\u4f8b\u3002<\/span><\/p>\n


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2.\u5229\u7528SVM\u7b97\u6cd5\u8fdb\u884c\u6b4c\u66f2\u5206\u7c7b<\/span><\/strong><\/p>\n<\/section>\n<\/section>\n<\/section>\n

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\u5c0f\u7f16\u9996\u5148\u5728\u6b4c\u8bcd\u7f51\u7ad9\u4e0a\u722c\u53d6\u4e86\u90d1\u6e90\u3001\u5f20\u4fe1\u54f2\u3001\u6210\u9f99\u7b49\u51e0\u4f4d\u6b4c\u624b\u6240\u5531\u6b4c\u66f2\u7684\u6b4c\u8bcd\uff0c\u5e76\u7b5b\u9009\u51fa\u7231\u60c5\u7c7b\u6b4c\u66f2112\u9996\uff0c\u52b1\u5fd7\u7c7b\u6b4c\u66f294\u9996\uff0c\u4fdd\u5b58\u4e3asongs_content.xlsx\u6587\u4ef6\uff0c\u5e76\u6807\u6ce8\u4e86\u5177\u4f53\u7684\u7c7b\u522b\u6807\u7b7e\u3002\u4e0b\u9762\uff0c\u6211\u4eec\u5c06\u5229\u7528<\/span>\u5411\u91cf\u7a7a\u95f4\u6a21\u578b\u7ed3\u5408SVM\u7b97\u6cd5<\/span><\/strong>\u5bf9\u8fd9\u4e24\u7c7b\u6b4c\u66f2\u8fdb\u884c\u5efa\u6a21\u548c\u5206\u7c7b\u3002<\/span><\/p>\n

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\u9996\u5148\u5bfc\u5165\u540e\u9762\u9700\u8981\u7528\u5230\u7684\u5e93\u548c\u51fd\u6570\uff0c\u5bf9\u6b4c\u8bcd\u8fdb\u884c\u9884\u5904\u7406\uff0c\u4f7f\u7528jieba\u5e93\u8fdb\u884c\u5206\u8bcd\uff0c\u5206\u8bcd\u540e\u7684\u6548\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u5e76\u5c06\u7c7b\u522b\u6807\u7b7e\u4fdd\u5b58\u5728label\u5217\u8868\u3002<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n

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\u7136\u540e\u901a\u8fc7\u8ba1\u7b97\u6b4c\u8bcd\u4e2d\u5168\u90e8\u7279\u5f81\u7684<\/span>tf-idf<\/span><\/strong>\u503c\uff0c\u5c06\u6b4c\u8bcd\u6587\u672c\u8f6c\u5316\u4e3a\u5411\u91cf\uff0c<\/span>\u6784\u5efa\u5411\u91cf\u7a7a\u95f4\u6a21\u578b<\/span><\/strong>\uff0c\u5f97\u5230\u4e00\u4e2a206\u884c4481\u7ef4\u7684\u7279\u5f81\u5411\u91cf\u77e9\u9635\u3002\u518d\u4f7f\u7528<\/span>train_test_split<\/span><\/strong>\u51fd\u6570\u5c06\u6837\u672c\u968f\u673a\u5206\u4e3a\u8bad\u7ec3\u96c6\u548c\u6d4b\u8bd5\u96c6\uff0c\u8fd9\u91cc\u6211\u4eec\u53d6\u51fa20%\u7684\u6837\u672c\u7528\u6765\u6d4b\u8bd5\uff0c\u53e680%\u7684\u6837\u672c\u7528\u6765\u5efa\u6a21\u3002<\/span><\/p>\n

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\u6784\u5efaSVM\u8bad\u7ec3\u6a21\u578b<\/span><\/strong>\uff0c\u9009\u62e9\u53c2\u6570gamma = 0.001,C\u4e3a100\uff0c\u6838\u51fd\u6570\u9ed8\u8ba4\u4e3a<\/span>rbf\u6838\u51fd\u6570<\/span><\/strong>\uff0c\u5c06\u8bad\u7ec3\u96c6\u6837\u672c\u8f93\u5165\u6a21\u578b\u8fdb\u884c\u62df\u5408\u540e\uff0c\u518d\u4f7f\u7528\u8be5\u6a21\u578b\u5bf9\u6d4b\u8bd5\u96c6\u8fdb\u884c\u9884\u6d4b\uff0c\u901a\u8fc7\u6bd4\u8f83\u9884\u6d4b\u7ed3\u679c\u548c\u5b9e\u9645\u7ed3\u679c\uff0c\u53d1\u73b0\u7cbe\u786e\u7387\u3001\u53ec\u56de\u7387\u548cf1-score\u7684\u503c\u90fd\u6bd4\u8f83\u4f4e\u3002\u63a5\u4e0b\u6765\u6539\u53d8\u6838\u51fd\u6570\uff0c\u4f7f\u7528<\/span>\u7ebf\u6027\u6838linear<\/span><\/strong>\u8bd5\u8bd5\uff0c\u5f97\u5230\u7684\u6a21\u578b\u7684\u7cbe\u786e\u7387\u4e3a0.875\uff0c\u53ec\u56de\u7387\u4e3a0.955\uff0cf1-score\u4e3a0.913\u3002<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n

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\u53ef\u4ee5\u770b\u51fa\uff0c\u4f7f\u7528\u7ebf\u6027\u6838\u51fd\u6570\u540e\u6a21\u578b\u80fd\u591f\u5f97\u5230\u8f83\u9ad8\u7684\u7cbe\u5ea6\u3002\u5f53\u7136\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5176\u4ed6\u65b9\u5f0f\u5bf9\u8be5\u6a21\u578b\u8fdb\u4e00\u6b65\u4f18\u5316\uff0c\u5982\u589e\u52a0\u6837\u672c\u3001\u5220\u9664\u4e00\u4e9b\u505c\u7528\u8bcd\uff0c\u4f7f\u7528\u5176\u4ed6\u65b9\u6cd5\u5bf9\u6587\u672c\u7279\u5f81\u8fdb\u884c\u63d0\u53d6\u6216\u8c03\u8bd5\u6a21\u578b\u53c2\u6570\u7b49\u3002<\/span><\/p>\n

<\/p>\n

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