{"id":364896,"date":"2022-09-30T01:03:35","date_gmt":"2022-09-29T17:03:35","guid":{"rendered":"https:\/\/www.idc.net\/help\/364896\/"},"modified":"2022-09-30T01:03:35","modified_gmt":"2022-09-29T17:03:35","slug":"%e4%ba%bf%e7%ba%a7%e6%8e%a8%e5%b9%bf%e6%b5%81%e9%87%8f%e4%bb%8d%e8%83%bd%e7%b2%be%e5%87%86%e6%8e%a8%e8%8d%90%ef%bc%9f%e8%a7%a3%e8%af%bb%e6%a0%b8%e5%bf%83%e7%ae%97%e6%b3%95%e7%9a%84%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/364896\/","title":{"rendered":"\u4ebf\u7ea7\u63a8\u5e7f\u6d41\u91cf\u4ecd\u80fd\u7cbe\u51c6\u63a8\u8350\uff1f\u89e3\u8bfb\u6838\u5fc3\u7b97\u6cd5\u7684\u5e94\u7528\u5b9e\u8df5"},"content":{"rendered":"<p>\u3010\u7a3f\u4ef6\u3011<span style=\"font-size: 15px\">\u963f\u91cc\u5988\u5988\uff0c\u662f\u4e00\u4e2a\u60f3\u8ba9\u5929\u4e0b\u6ca1\u6709\u96be\u505a\u7684\u8425\u9500\u7684\u5927\u6570\u636e\u5e73\u53f0\uff0c\u5b83\u62e5\u6709\u963f\u91cc\u5df4\u5df4\u96c6\u56e2\u7684\u6838\u5fc3\u5546\u4e1a\u6570\u636e\u3002\u5728\u8fd9\u91cc\uff0c\u6bcf\u5929\u6709\u8d85\u8fc750\u4ebf\u7684\u63a8\u5e7f\u6d41\u91cf\u5b8c\u6210\u8d85\u8fc73\u4ebf\u4ef6\u5546\u54c1\u7684\u63a8\u5e7f\u5c55\u73b0\uff0c\u8986\u76d6\u9ad8\u8fbe98%\u7684\u7f51\u6c11\uff0c\u5b9e\u73b0\u6570\u5b57\u5a92\u4f53\uff08PC\u7aef+\u65e0\u7ebf\u7aef+\u4e92\u8054\u7f51\u7535\u89c6\u7aef\uff09\u7684\u4e00\u7ad9\u5f0f\u89e6\u8fbe\u3002<\/span><\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u5728\u8fd9\u4e9b\u9c9c\u4eae\u7684\u6570\u636e\u80cc\u540e\uff0c\u662f\u4ec0\u4e48\u6837\u7684\u6838\u5fc3\u7b97\u6cd5\u5728\u8d77\u4f5c\u7528\uff1f\u5b83\u5982\u4f55\u4fdd\u8bc1\u5546\u5bb6\u7684\u4ea7\u54c1\u5f97\u5230\u6700\u6709\u6548\u7684\u63a8\u8350\uff1f<strong><em><span style=\"font-size: 15px\">\u672c\u6587\u5c06\u7ed9\u5927\u5bb6\u8be6\u89e3\u963f\u91cc\u5988\u5988 CTR \u9884\u4f30\u6838\u5fc3\u7b97\u6cd5 MLR \u7684\u7814\u53d1\u80cc\u666f\u548c\u5e94\u7528\u5b9e\u8df5\u3002<\/span><\/em><\/strong><\/span>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<\/p>\n<p style=\"margin: 0px;padding: 0px\">&nbsp;<\/p>\n<p style=\"margin: 0px;padding: 0px\"><strong>\u4e00\u3001\u5173\u952e\u8bcd\u5c0f\u77e5\u8bc6<\/strong><\/p>\n<\/p>\n<p>&nbsp;<\/p>\n<p style=\"line-height: 1.75em;margin-bottom: 10px\"><span style=\"font-size: 15px\">\u70b9\u51fb\u901a\u8fc7\u7387 CTR<\/span><span style=\"font-size: 15px\">\uff08Click-Through-Rate\uff09\uff0c\u6307\u7f51\u7edc\u5e7f\u544a\uff08\u56fe\u7247\u5e7f\u544a\/\u6587\u5b57\u5e7f\u544a\/\u5173\u952e\u8bcd\u5e7f\u544a\/\u6392\u540d\u5e7f\u544a\/\u89c6\u9891\u5e7f\u544a\u7b49\uff09\u7684\u70b9\u51fb\u5230\u8fbe\u7387\uff0c\u5373\u8be5\u5e7f\u544a\u7684\u5b9e\u9645\u70b9\u51fb\u6b21\u6570\u9664\u4ee5\u5e7f\u544a\u7684\u5c55\u73b0\u91cf\u3002<\/span><span style=\"font-size: 15px\"><br \/> <\/span><\/p>\n<p style=\"line-height: 1.75em;margin-bottom: 10px\"><span style=\"font-size: 15px\"><span style=\"font-size: 15px\">\u70b9\u51fb\u7387\u9884\u4f30<\/span>\uff08Click-Through Rate Prediction\uff09\u662f\u4e92\u8054\u7f51\u4e3b\u6d41\u5e94\u7528(\u5e7f\u544a\u3001\u63a8\u8350\u3001\u641c\u7d22\u7b49)\u7684\u6838\u5fc3\u7b97\u6cd5\u95ee\u9898\u3002<\/span><\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">CTR \u9884\u4f30\u662f\u4e92\u8054\u7f51\u8ba1\u7b97\u5e7f\u544a\u4e2d\u7684\u5173\u952e\u6280\u672f\u73af\u8282\uff0c\u9884\u4f30\u51c6\u786e\u6027\u76f4\u63a5\u5f71\u54cd\u5546\u5bb6\u7684\u5e7f\u544a\u6536\u5165\u3002\u5e7f\u544a\u9886\u57df\u7684 CTR \u9884\u4f30\u9762\u4e34\u7684\u662f\u8d85\u9ad8\u7ef4\u79bb\u6563\u7279\u5f81\u7a7a\u95f4\u4e2d\u6a21\u5f0f\u53d1\u73b0\u7684\u6311\u6218\uff0c\u5373\u5982\u4f55\u62df\u5408\u73b0\u6709\u6570\u636e\u7684\u89c4\u5f8b\uff0c\u540c\u65f6\u53c8\u5177\u5907\u63a8\u5e7f\u6027\u3002<\/span><\/p>\n<p>&nbsp;<\/p>\n<\/p>\n<p style=\"margin: 0px;padding: 0px\">&nbsp;<\/p>\n<p style=\"margin: 0px;padding: 0px\"><strong>\u4e8c\u3001CTR\u9884\u4f30\u7b97\u6cd5<\/strong><\/p>\n<\/p>\n<p>&nbsp;<\/p>\n<p style=\"line-height: 1.75em;margin-bottom: 10px\"><span style=\"font-size: 16px\"><strong><span>\u4f20\u7edfCTR\u9884\u4f30\u7b97\u6cd5\u548c\u975e\u7ebf\u6027\u6a21\u578b\u5b58\u5728\u7684\u4e0d\u8db3<\/span><\/strong><\/span><\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u4e1a\u754c\u4f20\u7edf\u7684 CTR \u9884\u4f30\u89e3\u6cd5\u662f<\/span><span style=\"font-size: 15px\">\u5e7f\u4e49\u7ebf\u6027\u6a21\u578b LR (logistic regression\uff0c\u903b\u8f91\u65af\u7279\u56de\u5f52)+\u4eba\u5de5\u7279\u5f81\u5de5\u7a0b\u3002LR \u4f7f\u7528\u4e86 Logit \u53d8\u6362\u5c06\u51fd\u6570\u503c\u6620\u5c04\u52300~1\u533a\u95f4\uff0c\u6620\u5c04\u540e\u7684\u51fd\u6570\u503c\u5c31\u662f CTR \u7684\u9884\u4f30\u503c\u3002LR \u8fd9\u79cd\u7ebf\u6027\u6a21\u578b\u5f88\u5bb9\u6613\u5e76\u884c\u5316\uff0c\u5904\u7406\u4e0a\u4ebf\u6761\u8bad\u7ec3\u6837\u672c\u4e0d\u662f\u95ee\u9898\u3002<\/span><\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u4f46<span style=\"font-size: 15px\">\u8fd9\u79cd\u89e3\u6cd5\u7684\u4e0d\u8db3\u662f<\/span>\u7ebf\u6027\u6a21\u578b\u7684\u5b66\u4e60\u80fd\u529b\u6709\u9650\uff0c\u9700\u8981\u5f15\u5165\u5927\u91cf\u7684\u9886\u57df\u77e5\u8bc6\u6765\u4eba\u5de5\u8bbe\u8ba1\u7279\u5f81\u4ee5\u53ca\u7279\u5f81\u4e4b\u95f4\u7684\u4ea4\u53c9\u7ec4\u5408\u6765\u95f4\u63a5\u8865\u5145\u7b97\u6cd5\u7684\u975e\u7ebf\u6027\u5b66\u4e60\u80fd\u529b\uff0c\u975e\u5e38\u6d88\u8017\u4eba\u529b\u548c\u673a\u5668\u8d44\u6e90\uff0c\u8fc1\u79fb\u6027\u4e0d\u591f\u53cb\u597d\u3002<\/span><\/p>\n<p style=\"line-height: 1.75em;margin-bottom: 10px\"><span style=\"font-size: 15px\">\u53e6\u5916\uff0c\u4e1a\u754c\u4e5f\u6709\u4e00\u4e9b\u6548\u679c\u4e0d\u9519\u7684\u975e\u7ebf\u6027\u6a21\u578b\u4e0d\u65ad\u88ab\u63d0\u51fa\u6765\uff0c\u5e76\u88ab\u5de5\u7a0b\u5b9e\u8df5\u4e14\u53d6\u5f97\u4e0d\u9519\u6548\u679c\uff0c\u4f46\u8fd9\u4e9b\u6a21\u578b\u90fd\u6216\u591a\u6216\u5c11\u5b58\u5728\u4e00\u4e9b<strong><span style=\"font-size: 15px\">\u4e0d\u8db3<\/span><\/strong>\u3002<\/span><\/p>\n<ul>\n<li>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">Kernel \u65b9\u6cd5\uff0c\u56e0\u4e3a<span style=\"font-size: 15px\">\u590d\u6742\u5ea6\u592a\u9ad8<\/span>\u800c\u4e0d\u6613\u5b9e\u73b0\u3002<\/span><\/p>\n<\/li>\n<li>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">Tree based \u65b9\u6cd5\uff0c\u7531 Facebook \u56e2\u961f\u57282014\u5e74\u9996\u5148\u63d0\u51fa\uff0c\u6709\u6548\u5730\u89e3\u51b3\u4e86 LR \u6a21\u578b\u7684\u7279\u5f81\u7ec4\u5408\u95ee\u9898\uff0c\u4f46\u7f3a\u70b9\u4ecd\u7136\u662f<span style=\"font-size: 15px\">\u5bf9\u5386\u53f2\u884c\u4e3a\u7684\u8bb0\u5fc6\uff0c\u7f3a\u4e4f\u63a8\u5e7f\u6027<\/span>\u3002<\/span><\/p>\n<\/li>\n<li>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">FM\uff08factorization machine\uff09\u6a21\u578b\uff0c\u80fd\u81ea\u52a8\u5b66\u4e60\u9ad8\u9636\u5c5e\u6027\u7684\u6743\u503c\uff0c\u4e0d\u7528\u901a\u8fc7\u4eba\u5de5\u7684\u65b9\u5f0f\u9009\u53d6\u7279\u5f81\u6765\u505a\u4ea4\u53c9\uff0c\u4f46FM\u6a21\u578b<span style=\"font-size: 15px\">\u53ea\u80fd\u62df\u5408\u7279\u5b9a\u7684\u975e\u7ebf\u6027\u6a21\u5f0f<\/span>\uff0c\u5982\u6700\u5e38\u7528\u7684 2 \u9636 FM \u53ea\u80fd\u62df\u5408\u7279\u5f81\u4e4b\u95f4\u7684\u7ebf\u6027\u5173\u7cfb\u548c\u4e8c\u6b21\u5173\u7cfb\u3002<\/span><\/p>\n<\/li>\n<li>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u6df1\u5ea6\u795e\u7ecf\u7f51\u7edc\u975e\u7ebf\u6027\u62df\u5408\u80fd\u529b\u8db3\u591f\u5f3a\uff0c\u4f46\u9762\u5bf9\u5e7f\u544a\u8fd9\u6837\u7684\u5927\u89c4\u6a21\u5de5\u4e1a\u7ea7\u7a00\u758f\u6570\u636e\uff0c<span style=\"font-size: 15px\">\u9002\u5408\u6570\u636e\u89c4\u5f8b\u7684\u3001\u5177\u5907\u63a8\u5e7f\u6027\u7684\u7f51\u7edc\u7ed3\u6784\u4e1a\u754c\u4f9d\u7136\u5728\u63a2\u7d22\u4e2d<\/span>\uff0c\u5c24\u5176\u662f\u8981\u505a\u5230\u7aef\u5230\u7aef\u89c4\u6a21\u5316\u4e0a\u7ebf\uff0c\u8fd9\u91cc\u9762\u7684\u6280\u672f\u6311\u6218\u4f9d\u7136\u5f88\u5927\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u90a3\u4e48\uff0c\u6311\u6218\u6765\u4e86\uff0c<strong>\u5982\u4f55\u8bbe\u8ba1\u7b97\u6cd5\u4ece\u5927\u89c4\u6a21\u6570\u636e\u4e2d\u6316\u6398\u51fa\u5177\u6709\u63a8\u5e7f\u6027\u7684\u975e\u7ebf\u6027\u6a21\u5f0f\uff1f <\/strong><\/span><\/p>\n<p style=\"line-height: 1.75em;margin-bottom: 10px\"><span><strong><span style=\"font-size: 16px\">\u963f\u91cc\u5988\u5988\u81ea\u4e3b\u7814\u53d1\u7684MLR\u7b97\u6cd5<\/span><\/strong><\/span><\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u57fa\u4e8e\u4e0a\u8ff0\u7684\u7b97\u6cd5\u7684\u4e0d\u8db3\u548c\u5546\u6237\u7684\u5b9e\u9645\u9700\u8981\uff0c2011-2012\u5e74\u671f\u95f4\uff0c\u963f\u91cc\u5988\u5988\u8d44\u6df1\u4e13\u5bb6\u76d6\u5764\uff08\u82b1\u540d\u9756\u4e16\uff09\u7a81\u7834\u4e3b\u6d41\u5927\u89c4\u6a21\u7ebf\u6027\u6a21\u578b\u7684\u601d\u8def\uff0c\u63d0\u51fa\u4e86 MLR (mixed logistic regression, \u6df7\u5408\u903b\u8f91\u65af\u7279\u56de\u5f52)\u7b97\u6cd5\uff0c\u7ed9\u5e7f\u544a\u9886\u57df CTR \u9884\u4f30\u7b97\u6cd5\u5e26\u6765\u4e86\u65b0\u5347\u7ea7\u3002<\/span><\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">MLR \u7b97\u6cd5\u57fa\u4e8e\u6570\u636e\u81ea\u52a8\u53d1\u6398\u53ef\u63a8\u5e7f\u7684\u6a21\u5f0f\uff0c\u76f4\u63a5\u5728\u539f\u59cb\u7a7a\u95f4\u5b66\u4e60\u7279\u5f81\u4e4b\u95f4\u7684\u975e\u7ebf\u6027\u5173\u7cfb\uff0c\u76f8\u6bd4\u4e8e\u4eba\u5de5\u6765\u8bf4\u63d0\u5347\u4e86\u6548\u7387\u548c\u7cbe\u5ea6\u3002<\/span><\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">MLR \u53ef\u4ee5\u770b\u505a\u662f\u5bf9 LR \u7684\u4e00\u4e2a\u81ea\u7136\u63a8\u5e7f\uff0c\u5b83<span style=\"font-size: 15px\">\u91c7\u7528\u5206\u800c\u6cbb\u4e4b\u7684\u601d\u8def\uff0c\u7528\u5206\u7247\u7ebf\u6027\u7684\u6a21\u5f0f\u6765\u62df\u5408\u9ad8\u7ef4\u7a7a\u95f4\u7684\u975e\u7ebf\u6027\u5206\u7c7b\u9762<\/span>\uff0c\u5176<strong>\u5f62\u5f0f\u5316\u8868\u8fbe\u5982\u4e0b<\/strong>\uff1a<\/span><\/p>\n<p style=\"line-height: 1.75em\">&nbsp;<\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u8fd9\u91cc\u8d85\u53c2\u6570\u5206\u7247\u6570 m \u53ef\u4ee5\u8f83\u597d\u5730\u5e73\u8861\u6a21\u578b\u7684\u62df\u5408\u4e0e\u63a8\u5e7f\u80fd\u529b\u3002\u5f53 m=1 \u65f6\uff0cMLR \u5c31\u9000\u5316\u4e3a\u666e\u901a\u7684 LR\uff0cm \u8d8a\u5927\uff0c\u6a21\u578b\u7684\u62df\u5408\u80fd\u529b\u8d8a\u5f3a\uff0c\u4f46\u662f\u6a21\u578b\u53c2\u6570\u89c4\u6a21\u968f m \u7ebf\u6027\u589e\u957f\uff0c\u76f8\u5e94\u6240\u9700\u7684\u8bad\u7ec3\u6837\u672c\u4e5f\u968f\u4e4b\u589e\u957f\u3002<\/span><\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u56e0\u6b64\uff0c\u5b9e\u9645\u5e94\u7528\u4e2d m \u9700\u8981\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8fdb\u884c\u9009\u62e9\uff0c\u4e00\u822c m \u8bbe\u5b9a\u4e3a12\u3002\u4e0b\u56fe\u4e2d\uff0cMLR \u6a21\u578b\u7528 4 \u4e2a\u5206\u7247\u5b8c\u7f8e\u5730\u62df\u5408\u51fa\u6570\u636e\u4e2d\u7684\u83f1\u5f62\u5206\u7c7b\u9762\u3002<\/span><\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p style=\"margin-bottom: 10px\"><span style=\"font-size: 15px\">MLR \u7b97\u6cd5\u9002\u5408\u4e8e\u5de5\u4e1a\u7ea7\u7684\u5927\u89c4\u6a21\u7a00\u758f\u6570\u636e\u573a\u666f\u95ee\u9898\uff0c<strong><span style=\"font-size: 15px\">\u4f18\u52bf\u4f53\u73b0\u5728\u4e24\u4e2a\u65b9\u9762\uff1a<\/span><\/strong><\/span><\/p>\n<ol>\n<li>\n<p style=\"margin-bottom: 5px\"><span style=\"font-size: 15px\">\u7aef\u5230\u7aef\u7684\u975e\u7ebf\u6027\u5b66\u4e60<\/span><span style=\"font-size: 15px\">\uff1a\u4ece\u6a21\u578b\u7aef\u81ea\u52a8\u6316\u6398\u6570\u636e\u4e2d\u8574\u85cf\u7684\u975e\u7ebf\u6027\u6a21\u5f0f\uff0c\u7701\u53bb\u4e86\u5927\u91cf\u7684\u4eba\u5de5\u7279\u5f81\u8bbe\u8ba1\uff0c\u53ef\u4ee5\u7aef\u5230\u7aef\u5730\u5b8c\u6210\u8bad\u7ec3\uff0c\u4f7f\u5f97\u5728\u4e0d\u540c\u573a\u666f\u4e2d\u7684\u8fc1\u79fb\u548c\u5e94\u7528\u53d8\u5f97\u8f7b\u677e\u3002<\/span><\/p>\n<\/li>\n<li>\n<p><span style=\"font-size: 15px\">\u7a00\u758f\u6027<\/span><span style=\"font-size: 15px\">\uff1aMLR \u5728\u5efa\u6a21\u65f6\u5f15\u5165\u4e86\u548c\u8303\u6570\u6b63\u5219\uff0c\u4f7f\u5f97\u6700\u7ec8\u8bad\u7ec3\u51fa\u6765\u7684\u6a21\u578b\u5177\u6709\u8f83\u9ad8\u7684\u7a00\u758f\u5ea6\uff0c \u6a21\u578b\u7684\u5b66\u4e60\u548c\u5728\u7ebf\u9884\u6d4b\u6027\u80fd\u66f4\u597d\u3002<\/span><\/p>\n<\/li>\n<\/ol>\n<p style=\"margin-bottom: 10px\"><strong><span style=\"font-size: 16px\">MLR\u7b97\u6cd5\u9ad8\u7ea7\u7279\u6027<\/span><\/strong><\/p>\n<p style=\"margin-bottom: 10px\"><span style=\"font-size: 15px\">\u5728\u5177\u4f53\u7684\u5b9e\u8df5\u5e94\u7528\u4e2d\uff0c\u963f\u91cc\u5988\u5988\u7cbe\u51c6\u5b9a\u5411\u56e2\u961f\u8fdb\u4e00\u6b65\u53d1\u5c55\u4e86 <span style=\"font-size: 15px\">MLR \u7b97\u6cd5\u7684\u591a\u79cd\u9ad8\u7ea7\u7279\u6027\uff0c\u4e3b\u8981\u5305\u62ec\uff1a<\/span><\/span><\/p>\n<p><span style=\"font-size: 15px\">\u7ed3\u6784\u5148\u9a8c<\/span><span style=\"font-size: 15px\">\u3002\u57fa\u4e8e\u9886\u57df\u77e5\u8bc6\u5148\u9a8c\uff0c\u7075\u6d3b\u5730\u8bbe\u5b9a\u7a7a\u95f4\u5212\u5206\u4e0e\u7ebf\u6027\u62df\u5408\u4f7f\u7528\u7684\u4e0d\u540c\u7279\u5f81\u7ed3\u6784\u3002\u5b83\u6709\u52a9\u4e8e\u5e2e\u52a9\u6a21\u578b\u7f29\u5c0f\u89e3\u7a7a\u95f4\u7684\u63a2\u7d22\u8303\u56f4\uff0c\u6536\u655b\u66f4\u5bb9\u6613\u3002<\/span><\/p>\n<p><span style=\"font-size: 15px\">\u4f8b\u5982\u7cbe\u51c6\u5b9a\u5411\u5e7f\u544a\u4e2d\u9a8c\u8bc1\u6709\u6548\u7684\u5148\u9a8c\u4e3a\uff1a\u4ee5 user \u7279\u5f81\u7a7a\u95f4\u5212\u5206\u3001\u4ee5 ad \u7279\u5f81\u4e3a\u7ebf\u6027\u62df\u5408\u3002\u5b83\u7b26\u5408\u4eba\u4eec\u7684\u5e38\u89c4\u8ba4\u77e5\uff1a\u4e0d\u540c\u4eba\u7fa4\u5177\u6709\u805a\u7c7b\u7279\u6027\uff0c\u540c\u4e00\u7c7b\u4eba\u7fa4\u5bf9\u5e7f\u544a\u6709\u7c7b\u4f3c\u7684\u504f\u597d\uff0c\u4f8b\u5982\u9ad8\u6d88\u8d39\u4eba\u7fa4\u559c\u6b22\u70b9\u51fb\u9ad8\u5ba2\u5355\u4ef7\u7684\u5e7f\u544a\u3002<\/span><\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u7ebf\u6027\u504f\u7f6e<\/span><span style=\"font-size: 15px\">\u3002\u8fd9\u4e2a\u7279\u6027\u63d0\u4f9b\u4e86\u4e00\u4e2a\u8f83\u597d\u7684\u65b9\u6cd5\u89e3\u51b3 CTR \u9884\u4f30\u95ee\u9898\u4e2d\u7684 bias \u7279\u5f81\uff0c\u5982\u4f4d\u7f6e\u3001\u8d44\u6e90\u4f4d\u7b49\u3002\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5de5\u7a0b\u5e08\u901a\u8fc7\u5bf9\u4f4d\u7f6e bias \u4fe1\u606f\u7684\u5efa\u6a21\uff0c\u83b7\u5f97\u4e86 4% \u7684 RPM\u63d0\u5347\u6548\u679c\u3002<\/span><\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\"><span>\u6a21\u578b\u7ea7\u8054<\/span>\u3002MLR \u652f\u6301\u4e0e LR \u6a21\u578b\u7684\u7ea7\u8054\u5f0f\u8054\u5408\u8bad\u7ec3\uff0c\u8fd9\u6709\u70b9\u7c7b\u4f3c\u4e8e wide&amp;deep learning\u3002\u4e00\u4e9b\u5f3a feature \u914d\u7f6e\u6210\u7ea7\u8054\u6a21\u5f0f\u6709\u52a9\u4e8e\u63d0\u9ad8\u6a21\u578b\u7684\u6536\u655b\u6027\u3002<\/span><\/p>\n<p style=\"line-height: 1.75em\"><strong><span style=\"font-size: 15px\">\u5178\u578b\u7684\u5e94\u7528\u65b9\u6cd5\u662f\uff1a<\/span><\/strong><span style=\"font-size: 15px\">\u4ee5\u7edf\u8ba1\u53cd\u9988\u7c7b\u7279\u5f81\u6784\u5efa\u7b2c\u4e00\u5c42\u6a21\u578b\uff0c\u5b83\u7684\u8f93\u51fa(\u5982\u4e0b\u56fe\u4e2d\u7684 FBCtr)\u7ea7\u8054\u5230\u7b2c\u4e8c\u7ea7\u5927\u89c4\u6a21\u7a00\u758f ID \u7279\u5f81\u4f53\u7cfb\u4e2d\u53bb\uff0c\u80fd\u591f\u83b7\u5f97\u66f4\u597d\u7684\u63d0\u5347\u6548\u679c\u3002<\/span><\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u589e\u91cf\u8bad\u7ec3<\/span><span style=\"font-size: 15px\">\u3002MLR \u901a\u8fc7\u7ed3\u6784\u5148\u9a8c\u8fdb\u884c pretrain\uff0c\u7136\u540e\u518d\u589e\u91cf\u8fdb\u884c\u5168\u7a7a\u95f4\u53c2\u6570\u5bfb\u4f18\u8bad\u7ec3\uff0c\u4f1a\u83b7\u5f97\u8fdb\u4e00\u6b65\u7684\u6548\u679c\u63d0\u5347\u3002\u540c\u65f6\u589e\u91cf\u8bad\u7ec3\u6a21\u5f0f\u4e0b\uff0c\u6a21\u578b\u8fbe\u5230\u6536\u655b\u7684\u6b65\u6570\u66f4\u5c0f\uff0c\u6536\u655b\u66f4\u4e3a\u7a33\u5b9a\u3002\u5728\u963f\u91cc\u5988\u5988\u7684\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u589e\u91cf\u8bad\u7ec3\u5e26\u6765\u7684 RPM \u589e\u76ca\u8fbe\u5230\u4e86 3%\u3002<\/span><\/p>\n<p style=\"text-align: center\">\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\"><br \/> <\/span><\/p>\n<p style=\"line-height: 1.75em;margin-bottom: 10px\"><strong><span style=\"font-size: 16px\">\u5927\u89c4\u6a21\u5206\u5e03\u5f0f\u5b9e\u73b0<\/span><\/strong><\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">MLR \u7b97\u6cd5\u9762\u5411\u7684\u662f\u5de5\u4e1a\u7ea7\u7684\u6570\u636e<\/span><span style=\"font-size: 15px\">\uff0c\u4f8b\u5982\u4ebf\u7ea7\u7279\u5f81\uff0c\u767e\u4ebf\u7ea7\u6837\u672c\u3002\u56e0\u6b64\uff0c\u5de5\u7a0b\u5e08\u8bbe\u8ba1\u4e86\u4e00\u5957\u5206\u5e03\u5f0f\u67b6\u6784\uff0c\u4ee5\u652f\u6301\u6a21\u578b\u7684\u9ad8\u6548\u5e76\u884c\u8bad\u7ec3\u3002<\/span><\/p>\n<p style=\"line-height: 1.75em\"><strong><span style=\"font-size: 15px\">\u4e0b\u56fe\u662f\u67b6\u6784\u793a\u610f\u56fe<\/span><\/strong><span style=\"font-size: 15px\">\uff0c\u5b83\u8ddf\u4f20\u7edf\u7684 parameter server \u67b6\u6784\u7565\u6709\u533a\u522b\uff0c\u4e3b\u8981\u4e0d\u540c\u70b9\u5728\u4e8e\u6bcf\u4e00\u4e2a\u5206\u5e03\u5f0f\u8282\u70b9\u4e0a\u540c\u65f6\u90e8\u7f72\u4e86 worker \u548c server \u4e24\u79cd\u89d2\u8272\uff0c\u800c\u4e0d\u662f\u5c06 server \u5355\u72ec\u5265\u79bb\u51fa\u53bb\u90e8\u7f72\u3002\u8fd9\u6837\u505a\u662f<span style=\"font-size: 15px\">\u4e3a\u4e86\u5145\u5206\u5229\u7528\u6bcf\u4e2a\u8282\u70b9\u7684 CPU \u548c\u5185\u5b58\uff0c\u4ece\u800c\u4fdd\u8bc1\u6700\u5927\u5316\u673a\u5668\u7684\u8d44\u6e90\u5229\u7528\u7387\u3002<\/span><\/span><\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u6b64\u5916\uff0c\u9488\u5bf9\u4e2a\u6027\u5316\u5e7f\u544a\u573a\u666f\u4e2d\u6570\u636e\u7684\u7ed3\u6784\u5316\u7279\u6027\uff0c\u4ed6\u4eec\u63d0\u51fa\u5e76\u5b9e\u73b0\u4e86 common feature \u7684 trick\uff0c\u53ef\u4ee5<span style=\"font-size: 15px\">\u5927<\/span><span style=\"font-size: 15px\">\u5e45\u5ea6\u538b\u7f29\u6837\u672c\u5b58\u50a8\u3001\u52a0\u901f\u6a21\u578b\u8bad\u7ec3<\/span>\u3002<\/span><\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u5982<strong>\u4e0b\u56fe<\/strong>\u6240\u89c1\uff0c\u5728\u5c55\u793a\u5e7f\u544a\u4e2d\uff0c\u4e00\u4e2a\u7528\u6237\u5728\u4e00\u5929\u4e4b\u5185\u4f1a\u770b\u5230\u591a\u6761\u5e7f\u544a\u5c55\u73b0\uff0c\u800c\u4e00\u5929\u4e4b\u5185\u8fd9\u4e2a\u7528\u6237\u7684\u5927\u91cf\u7684\u9759\u6001\u7279\u5f81\uff08\u5982\u5e74\u9f84\u3001\u6027\u522b\u3001\u6628\u5929\u4ee5\u524d\u7684\u5386\u53f2\u884c\u4e3a\uff09\u662f\u76f8\u540c\u7684\uff0c\u901a\u8fc7 common feature \u538b\u7f29\uff0c\u963f\u91cc\u5988\u5988\u5bf9\u8fd9\u4e9b\u6837\u672c\u53ea\u9700\u8981\u5b58\u50a8\u4e00\u6b21\u7528\u6237\u7684\u9759\u6001\u7279\u5f81\uff0c\u5176\u4f59\u6837\u672c\u901a\u8fc7\u7d22\u5f15\u4e0e\u5176\u5173\u8054\uff1b\u5728\u8bad\u7ec3\u8fc7\u7a0b\u4e2d\uff0c\u8fd9\u90e8\u5206\u7279\u5f81\u4e5f\u53ea\u9700\u8981\u8ba1\u7b97\u4e00\u6b21\u3002\u5728\u5b9e\u8df5\u4e2d\uff0c\u4ed6\u4eec\u5e94\u7528 common feature trick \u4f7f\u5f97\u76f8\u6bd4\u4e4b\u524d\uff0c\u4f7f\u7528\u8fd1 1\/3 \u7684\u8d44\u6e90\u6d88\u8017\u83b7\u5f97\u4e86 12 \u500d\u7684\u52a0\u901f\u3002 <br \/> <\/span><\/p>\n<p style=\"text-align: center\">\n<p>&nbsp;<\/p>\n<\/p>\n<p style=\"margin: 0px;padding: 0px\">&nbsp;<\/p>\n<p style=\"margin: 0px;padding: 0px\"><strong>\u4e09\u3001\u4e1a\u52a1\u5e94\u7528\u5b9e\u8df5<\/strong><\/p>\n<\/p>\n<p>&nbsp;<\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u4ece2013\u5e74\u8d77\uff0cMLR \u7b97\u6cd5\u5728\u963f\u91cc\u5988\u5988\u53ca\u963f\u91cc\u96c6\u56e2\u591a\u4e2a BU \u7684\u4e3b\u8981\u573a\u666f(\u5305\u62ec\u963f\u91cc\u5988\u5988\u7cbe\u51c6\u5b9a\u5411\u5e7f\u544a\u3001\u6dd8\u5b9d\u5ba2\u3001\u795e\u9a6c\u5546\u4e1a\u5e7f\u544a\u3001\u6dd8\u5b9d\u4e3b\u641c\u7b49\u7b49\uff09\u88ab\u5927\u89c4\u6a21\u5730\u5e94\u7528\u548c\u5c1d\u8bd5\uff0c\u5c24\u5176\u662f\u5728\u963f\u91cc\u5988\u5988\u7684\u7cbe\u51c6\u5b9a\u5411\u5e7f\u544a\u573a\u666f\uff0c\u7b97\u6cd5\u6a21\u578b\u521b\u65b0\u5e26\u6765\u4e86\u4e1a\u52a1\u4e0a\u7684\u91cd\u5927\u7a81\u7834\uff0c<span style=\"font-size: 15px\">\u4e3b\u8981\u573a\u666f\u4e0b\u7684 CTR \u548c RPM \u5747\u83b7\u5f97 20% \u4ee5\u4e0a\u7684\u63d0\u5347\u3002<\/span><\/span><span style=\"font-size: 15px\"><span style=\"font-size: 15px\"><br \/> <\/span><\/span><\/p>\n<p style=\"line-height: 1.75em;margin-bottom: 5px\"><strong><span style=\"font-size: 15px\">\u5178\u578b\u5e94\u7528\u5982\u4e0b\uff1a<\/span><\/strong><\/p>\n<p style=\"line-height: 1.75em;margin-bottom: 10px\"><span style=\"font-size: 16px\"><strong><span>\u57fa\u4e8e MLR \u7684\u5b9a\u5411\u5e7f\u544a CTR \u9884\u4f30\u7b97\u6cd5<\/span><\/strong><\/span><span style=\"font-size: 15px\"><br \/> <\/span><\/p>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u57fa\u4e8e MLR \u7b97\u6cd5\u7684\u975e\u7ebf\u6027\u5b66\u4e60\u80fd\u529b\uff0c\u963f\u91cc\u5988\u5988\u7684\u5b9a\u5411\u5e7f\u544a CTR \u9884\u4f30\u91c7\u7528\u4e86\u5927\u89c4\u6a21\u539f\u59cbID \u7279\u5f81 + MLR \u7b97\u6cd5\u7684\u67b6\u6784\u3002\u5177\u4f53\u4e3a\u523b\u753b\u4e00\u6b21\u5e7f\u544a\u5c55\u73b0\u4e3a\u7279\u5f81\u5411\u91cf\uff0c\u5b83\u7531\u4e09\u90e8\u5206\u72ec\u7acb\u6784\u6210\uff1a<\/span><\/p>\n<ul>\n<li>\n<p style=\"line-height: 1.75em\"><span style=\"font-size: 15px\">\u7528\u6237\u90e8\u5206\u7279\u5f81\uff08\u5305\u62ec userid\u3001profile 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