{"id":193,"date":"2016-05-07T18:23:12","date_gmt":"2016-05-07T18:23:12","guid":{"rendered":"http:\/\/blogs.softwareclue.com\/?p=193"},"modified":"2016-05-07T19:08:27","modified_gmt":"2016-05-07T19:08:27","slug":"%e9%80%bb%e8%be%91%e5%9b%9e%e5%bd%92%ef%bc%9a%e4%bb%8e%e5%85%a5%e9%97%a8%e5%88%b0%e7%b2%be%e9%80%9a","status":"publish","type":"post","link":"http:\/\/blog.softwareclues.com\/zh\/%e9%80%bb%e8%be%91%e5%9b%9e%e5%bd%92%ef%bc%9a%e4%bb%8e%e5%85%a5%e9%97%a8%e5%88%b0%e7%b2%be%e9%80%9a","title":{"rendered":"\u903b\u8f91\u56de\u5f52\uff1a\u4ece\u5165\u95e8\u5230\u7cbe\u901a"},"content":{"rendered":"<p>\u672c\u6587\u7531 \u5929\u773c\u67e5\u521b\u59cb\u4eba \u67f3\u8d85 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list-paddingleft-2\">\n<li><strong>\u4e86\u89e3LR\uff1a<\/strong>\u4e86\u89e3LR\u6a21\u578b\u3001L1\u548cL2\u89c4\u5219\u5316\uff08Regularization\uff09\u3001\u4e3a\u4ec0\u4e48L1\u89c4\u5219\u5316\u66f4\u503e\u5411\u4e8e\u4ea7\u751f\u7a00\u758f\u6a21\u578b\uff08Sparse\u00a0\u00a0\u00a0\u00a0Model\uff09\u3001\u4ee5\u53ca\u7a00\u758f\u6a21\u578b\u7684\u4f18\u70b9\u3002<\/li>\n<li><strong>\u7406\u89e3LR\uff1a<\/strong>\u7406\u89e3LR\u6a21\u578b\u7684\u5b66\u4e60\u7b97\u6cd5\u3001\u80fd\u591f\u72ec\u81ea\u63a8\u5bfc\u57fa\u4e8eL-BFGS\u7684L1\u548cL2\u89c4\u5219\u5316\u7684LR\u7b97\u6cd5\uff0c\u5e76\u5c06\u5176\u5728MPI\u5e73\u53f0\u4e0a\u5e76\u884c\u5316\u5b9e\u73b0\u3002<\/li>\n<li><strong>\u6539\u8fdbLR\uff1a<\/strong>\u80fd\u591f\u5728\u5b9e\u9645\u4e2d\u81ea\u5982\u5e94\u7528LR\uff0c\u6301\u7eed\u6539\u8fdbLR\u6765\u89e3\u51b3\u5b9e\u9645\u4e2d\u672a\u66fe\u9047\u89c1\u5230\u7684\u95ee\u9898\u3002\u4f8b\u5982\uff0c\u5f53\u6570\u636e\u4e2d\u7684\u6b63\u6837\u672c\u8fdc\u8fdc\u5c0f\u4e8e\u8d1f\u6837\u672c\u7684\u60c5\u51b5\u4e0b\uff08\u4f8b\u5982\uff0c\u5e7f\u544a\u70b9\u51fb\u7387\u9884\u544a\u95ee\u9898\uff09\uff0c\u8be5\u600e\u4e48\u8c03\u6574LR\uff1f\u5f53\u6570\u636e\u4e2d\u6709\u76f8\u5f53\u90e8\u5206\u7f3a\u5931\u65f6\u8be5\u5982\u4f55\u8c03\u6574\u7b97\u6cd5\uff1f<\/li>\n<\/ul>\n<p>\u7531\u4e8e\u6c42\u89e3LR\u662f\u4e00\u4e2a\u6027\u8d28\u5f88\u597d\u7684\u65e0\u7ea6\u675f\u4f18\u5316\u95ee\u9898\uff0c\u672c\u6587\u5728\u4ecb\u7ecdLR\u7684\u540c\u65f6\uff0c\u4e5f\u76f8\u5bf9\u7cfb\u7edf\u7684\u4ecb\u7ecd\u4e86\u65e0\u7ea6\u675f\u4f18\u5316\u95ee\u9898\u4e2d\u7684\u51e0\u4e2a\u5e38\u7528\u7684\u6570\u503c\u65b9\u6cd5\uff0c\u5305\u62ec\u6700\u901f\u68af\u5ea6\u4e0b\u964d\u65b9\u6cd5\u3001\u725b\u987f\u65b9\u6cd5\u3001\u548c\u62df\u725b\u987f\u65b9\u6cd5\u7684DFP\u3001BFGS\u3001\u4e0eL-BFGS\u3002\u671f\u671b\u540c\u5b66\u4eec\u80fd\u5728\u77e5\u9053\u4e86\u89e3\u8fd9\u4e9b\u7b97\u6cd5\u7684\u540c\u65f6\u771f\u6b63\u660e\u767d\u5176\u539f\u7406\u4e0e\u5e94\u7528\u573a\u666f\uff0c\u4f8b\u5982\u7406\u89e3\u4e3a\u4ec0\u4e48L-BFGS\u4e2d\u7684\u4e8c\u6b21\u5faa\u73af\u65b9\u6cd5\uff08two\u00a0\u00a0\u00a0\u00a0iteration\u00a0\u00a0\u00a0\u00a0method 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data-src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/wc7YNPm3YxWBUhO07iandD2ChIWoeFDWrq3HcxMFDYV8Bnou1kQtP6BE0Luzf2ZxbEw7icXFAsaztDaWibeicLibCJg\/0?wx_fmt=png\" data-ratio=\"0.6213991769547325\" data-w=\"\" \/><\/p>\n<p><strong>5\u3001OWL-QN\uff1a\u7528L-BFGS\u6c42\u89e3L1\u89c4\u5219\u5316\u7684\u903b\u8f91\u56de\u5f52<\/strong><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/wc7YNPm3YxWBUhO07iandD2ChIWoeFDWrfmofWXpa9f7GIfPpUA2RwdTicQ7o3xfdQw5olKPeUQhJUmiahEQCOw6Q\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1\" data-s=\"300,640\" data-type=\"png\" data-src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/wc7YNPm3YxWBUhO07iandD2ChIWoeFDWrfmofWXpa9f7GIfPpUA2RwdTicQ7o3xfdQw5olKPeUQhJUmiahEQCOw6Q\/0?wx_fmt=png\" data-ratio=\"0.5637860082304527\" data-w=\"\" \/><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/wc7YNPm3YxWBUhO07iandD2ChIWoeFDWr9I0dmlbKyb7I0bFU6X7QO3EN4Ria33iaL0B229VVLJNYYmOpGcHC0o0Q\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1\" data-s=\"300,640\" data-type=\"png\" data-src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/wc7YNPm3YxWBUhO07iandD2ChIWoeFDWr9I0dmlbKyb7I0bFU6X7QO3EN4Ria33iaL0B229VVLJNYYmOpGcHC0o0Q\/0?wx_fmt=png\" data-ratio=\"0.5781893004115226\" data-w=\"\" \/><\/p>\n<p><strong>6\u3001\u76f8\u5173\u5de5\u4f5c<\/strong><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/wc7YNPm3YxWBUhO07iandD2ChIWoeFDWrBTibR31vdWm7NxMxL1fRheJ6jrXQ1zlibQIJUick7feLBoGqib1sick7dyA\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1\" data-s=\"300,640\" data-type=\"png\" data-src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/wc7YNPm3YxWBUhO07iandD2ChIWoeFDWrBTibR31vdWm7NxMxL1fRheJ6jrXQ1zlibQIJUick7feLBoGqib1sick7dyA\/0?wx_fmt=png\" data-ratio=\"0.5205761316872428\" data-w=\"\" \/><\/p>\n<p><strong>7\u3001\u524d\u6cbf\u7814\u7a76<\/strong><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/mmbiz.qpic.cn\/mmbiz\/wc7YNPm3YxWBUhO07iandD2ChIWoeFDWrphEsMNSu1n619wLnibxibU8TEZTSHtYp8zCasZrUdrODOk1EspIojrWQ\/640?wx_fmt=png&amp;wxfrom=5&amp;wx_lazy=1\" 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\/><\/p>\n<h1><strong><strong>\u25c6\u00a0\u25c6\u00a0\u25c6<\/strong><\/strong><\/h1>\n<p><strong>\u5173\u4e8e\u4f5c\u8005<\/strong><\/p>\n<p>\u67f3\u8d85\u535a\u58eb\uff0c\u5929\u773c\u67e5\u521b\u59cb\u4eba\u3001\u8463\u4e8b\u957f\u517c\u603b\u7ecf\u7406\uff0c\u56fd\u5bb6\u9752\u5e74\u201c\u5343\u4eba\u8ba1\u5212\u201d\u4e13\u5bb6\u3001\u5317\u4eac\u5e02\u7279\u8058\u4e13\u5bb6\u3001\u5317\u4eac\u822a\u7a7a\u822a\u5929\u5927\u5b66\u201c\u5927\u6570\u636e\u201d\u7279\u8058\u6559\u6388\u3001\u4e2d\u56fd\u5927\u6570\u636e\u4e13\u5bb6\u59d4\u5458\u4f1a\u59d4\u5458\u3001\u56fd\u5bb6\u4e0b\u4e00\u4ee3\u4e92\u8054\u7f51\u4ea7\u4e1a\u6280\u672f\u521b\u65b0\u8054\u76df\u4e13\u5bb6\u3002\u67f3\u8d85\u535a\u58eb\u521b\u529e\u5929\u773c\u67e5\u4e4b\u524d\uff0c\u66fe\u4efb\u641c\u72d7\u79d1\u6280\u9996\u5e2d\u79d1\u5b66\u5bb6\uff0c\u7f8e\u56fd\u5fae\u8f6f\u7814\u7a76\u9662\u603b\u90e8\u7814\u7a76\u7ecf\u7406\uff0c\u7f8e\u56fd\u56fd\u5bb6\u81ea\u7136\u79d1\u5b66\u57fa\u91d1\u6570\u636e\u6316\u6398\u65b9\u5411\u7684\u8bc4\u5ba1\u4e13\u5bb6\u3002<\/p>\n<p>\u67f3\u8d85\u4e8e2007\u5e74\u5728\u7f8e\u56fd\u4f0a\u5229\u8bfa\u4f0a\u5927\u5b66\u83b7\u5f97\u8ba1\u7b97\u673a\u535a\u58eb\u5b66\u4f4d\uff0c\u5e76\u83b7\u5f97\u4f0a\u5229\u8bfa\u4f0a\u5927\u5b66\u6770\u51fa\u6bd5\u4e1a\u8bba\u6587\u5956\uff0c\u4e4b\u540e\u5728\u6570\u636e\u6316\u6398\u3001\u4e91\u8ba1\u7b97\u3001\u5927\u6570\u636e\u5206\u6790\u3001\u8f6f\u4ef6\u5de5\u7a0b\u7b49\u65b9\u9762\u53d6\u5f97\u4e86\u51fa\u8272\u7684\u7814\u7a76\u6210\u679c\u30022008\u5e74\u81f32012\u5e74\uff0c\u67f3\u8d85\u535a\u58eb\u4efb\u804c\u4e8e\u7f8e\u56fd\u5fae\u8f6f\u7814\u7a76\u9662\uff0c\u4e3b\u7ba1\u6570\u636e\u667a\u80fd\u56e2\u961f\uff0c\u671f\u95f4\u5728\u4fe1\u606f\u68c0\u7d22\u3001\u6570\u636e\u6316\u6398\u548c\u673a\u5668\u5b66\u4e60\u7b49\u8bf8\u591a\u5927\u6570\u636e\u76f8\u5173\u9886\u57df\u4f5c\u51fa\u4e86\u7a81\u51fa\u8d21\u732e\uff0c\u5171\u8ba1\u51fa\u7248\u4e86 3 \u672c\u82f1\u6587\u4e13\u8457\u30015\u7bc7\u56fd\u9645\u671f\u520a\u6587\u7ae0\uff0c\u4ee5\u53ca30\u4f59\u7bc7\u56fd\u9645\u4e00\u6d41\u5b66\u672f\u4f1a\u8bae\u6587\u7ae0\uff0c\u5171\u8ba11300+\u6b21\u72ec\u7acb\u5f15\u7528\u3002<\/p>\n<p>\u67f3\u8d85\u535a\u58eb\u5728\u7f8e\u671f\u95f4\u66fe\u62c5\u4efb\u7f8e\u56fd\u56fd\u5bb6\u81ea\u7136\u79d1\u5b66\u57fa\u91d1\u6570\u636e\u6316\u6398\u65b9\u5411\u7684\u8bc4\u5ba1\u4e13\u5bb6\uff0c\u591a\u6b21\u5e94\u9080\u8d74\u56fd\u9645\u77e5\u540d\u4f1a\u8bae\u505a\u4e3b\u9898\u62a5\u544a\u3002\u5176\u5de5\u4f5c\u6210\u679c\u5728\u56fd\u9645\u4e0a\u5907\u53d7\u5173\u6ce8\uff0c\u66fe\u88ab\u56fd\u9645\u7535\u5b50\u7535\u6c14\u5de5\u7a0b\u5e08\u534f\u4f1a\u7684IEEE Computer\u4e13\u4e1a\u6742\u5fd7\u4ee5\u7279\u9080\u5c01\u9762\u6587\u7ae0\u7684\u5f62\u5f0f\u8fdb\u884c\u62a5\u9053\u3002<\/p>\n<p>2012\u5e74\uff0c\u67f3\u8d85\u535a\u58eb\u56de\u56fd\u52a0\u5165\u817e\u8baf\u79d1\u6280\uff08\u5317\u4eac\uff09\u6709\u9650\u516c\u53f8\uff0c\u9886\u5bfc\u201c\u817e\u8baf\u641c\u7d22\u201d\u7684\u76f8\u5173\u6570\u636e\u6316\u6398\u4e0e\u673a\u5668\u5b66\u4e60\u4e1a\u52a1\u30022014\u5e74\uff0c\u5728\u817e\u8baf\u4e0e\u641c\u72d7\u7684\u6218\u7565\u5408\u5e76\u4e4b\u9645\u52a0\u5165\u641c\u72d7\u79d1\u6280\uff0c\u51fa\u4efb\u9996\u5e2d\u79d1\u5b66\u5bb6\uff0c\u4ece\u96f6\u7ec4\u5efa\u4e86\u641c\u72d7\u6570\u636e\u79d1\u5b66\u7814\u7a76\u9662\uff0c\u5168\u9762\u8d1f\u8d23\u641c\u72d7\u4e92\u8054\u7f51\u4e1a\u52a1\u7684\u6570\u636e\u6316\u6398\u4e0e\u673a\u5668\u5b66\u4e60\u7684\u524d\u6cbf\u7814\u7a76\u3002<br 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href=\"http:\/\/blogs.softwareclue.com\/wp-content\/uploads\/2016\/05\/LR_intro.pdf\">LR_intro<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u7531 \u5929\u773c\u67e5\u521b\u59cb\u4eba \u67f3\u8d85 \u539f\u521b\u9996\u53d1\u4e8e\u817e\u8baf \u5bfc\u8bfb \u4e0e\u7b97\u6cd5\u3001\u968f\u673a\u68ee\u6797\u3001\u652f\u6301\u5411\u91cf\u79ef\u3001\u795e\u7ecf\u7f51\u7edc\u3001\u4ee5\u53ca\u5404\u79cd\u7b97\u6cd5\u7684\u82b1\u5f0f\u6392 &hellip; <a href=\"http:\/\/blog.softwareclues.com\/zh\/%e9%80%bb%e8%be%91%e5%9b%9e%e5%bd%92%ef%bc%9a%e4%bb%8e%e5%85%a5%e9%97%a8%e5%88%b0%e7%b2%be%e9%80%9a\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span 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