{"id":38653,"date":"2019-08-15T00:00:42","date_gmt":"2019-08-14T16:00:42","guid":{"rendered":"https:\/\/case.ntu.edu.tw\/blog\/?p=38653"},"modified":"2022-01-04T01:21:36","modified_gmt":"2022-01-03T17:21:36","slug":"%e5%be%9e%e8%b3%87%e6%96%99%e4%b9%8b%e6%b5%b7%e6%92%88%e5%87%ba%e5%86%a0%e8%bb%8d%e6%9d%af2-2","status":"publish","type":"post","link":"https:\/\/case.ntu.edu.tw\/blog\/?p=38653","title":{"rendered":"\u5f9e\u8cc7\u6599\u4e4b\u6d77\u6488\u51fa\u51a0\u8ecd\u676f(2\/2)"},"content":{"rendered":"
\n
\"\u5f9e\u8cc7\u6599\u4e4b\u6d77\u6488\u51fa\u51a0\u8ecd\u676f(2\/2)\"<\/div>\n<\/div>\n
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\u64b0\u6587\uff0f\u6797\u8ed2\u7530\uff5c\u8f49\u8f09\u81ea\u300a\u79d1\u5b78\u4eba\u300b2012\u5e7411\u6708\u7b2c129\u671f<\/strong><\/p>\n

\u64ec\u5b9a\u7b56\u7565<\/strong><\/p>\n

2011\u5e74\u7684\u8cc7\u6599\u63a2\u52d8\u676f\u5176\u5be6\u548c\u3008\u6703\u601d\u8003\u7684\u96fb\u8166<\/a>\u3009\u6587\u4e2d\u6240\u63d0\u5230\u7684Netflix\u767e\u842c\u734e\u91d1\u5927\u8cfd\u5341\u5206\u76f8\u4f3c\u3002\u548c\u8a72\u6bd4\u8cfd\u6bd4\u8d77\u4f86\uff0c2011\u5e74\u7684\u8cc7\u6599\u63a2\u52d8\u676f\u5177\u6709\u300c\u8cc7\u6599\u91cf\u66f4\u5927\u300d\uff082.6\u5104\u7b46\uff0c\u76f8\u5c0d\u65bcNetflix\u76841\u5104\u7b46\uff09\u53ca\u300c\u984d\u5916\u8cc7\u8a0a\u66f4\u591a\u300d\u5169\u9805\u7279\u9ede\u3002\u5176\u4e2d\u6240\u8b02\u7684\u300c\u984d\u5916\u8cc7\u8a0a\u300d\uff0c\u662f\u6307\u4e3b\u8fa6\u55ae\u4f4d\u63d0\u4f9b\u4e86\u6b4c\u66f2\u7684\u4f5c\u8005\u3001\u5c08\u8f2f\u3001\u985e\u578b\u7b49\u76f8\u95dc\u8cc7\u8a0a\uff0c\u5e0c\u671b\u9810\u6e2c\u7cfb\u7d71\u80fd\u5584\u52a0\u5229\u7528\u3002\u5927\u91cf\u7684\u8cc7\u6599\u53ca\u984d\u5916\u8cc7\u8a0a\uff0c\u8b93\u53c3\u8cfd\u8005\u5f88\u96e3\u8a2d\u8a08\u6709\u6548\u7387\u7684\u7cfb\u7d71\u4f86\u5145\u4efd\u904b\u7528\u6240\u6709\u7684\u8cc7\u6599\u548c\u8cc7\u8a0a\uff0c\u5c31\u50cf\u6559\u6750\u592a\u591a\uff0c\u5b78\u751f\u5f88\u96e3\u6709\u6548\u7387\u5730\u8b80\u5b8c\u4e00\u6a23\u3002\u9019\u4e9b\u7279\u9ede\uff0c\u8b932011\u5e74\u7684\u8cc7\u6599\u63a2\u52d8\u676f\u6bd4\u8d77Netflix\u767e\u842c\u5927\u8cfd\u66f4\u70ba\u8907\u96dc\u800c\u56f0\u96e3\u3002<\/p>\n

\u5728Netflix\u767e\u842c\u5927\u8cfd\u88e1\u4e00\u500b\u91cd\u8981\u7684\u7cfb\u7d71\u8a2d\u8a08\u65b9\u5411\uff0c\u5c31\u50cf\u963f\u5e03\u2013\u83ab\u65af\u5854\u6cd5\u7684\u6587\u7ae0\u4e2d\u6240\u63d0\u5230\u7684\u5947\u7570\u503c\u5206\u89e3\u6cd5\uff08singular value decomposition\uff09\u4e00\u6a23\uff0c\u662f\u5e0c\u671b\u80fd\u6709\u6548\u7387\u5730\u8a08\u7b97\u51fa\u4f7f\u7528\u8005\u53ca\u6b4c\u66f2\u7684\u7279\u6027\u3002\u8209\u4f8b\u4f86\u8aaa\uff0c\u5982\u679c\u7cfb\u7d71\u77e5\u9053\uff0c\u674e\u56db\u559c\u6b61\u5145\u6eff\u7ae5\u8da3\u7684\u6b4c\u66f2\uff0c\u800c\u300c\u5feb\u6a02\u5929\u5802\u300d\u662f\u9996\u5145\u6eff\u7ae5\u8da3\u7684\u6b4c\u66f2\uff0c\u90a3\u9ebc\u7cfb\u7d71\u53ef\u80fd\u53ef\u4ee5\u63a8\u8ad6\uff1a\u674e\u56db\u6703\u559c\u6b61\u300c\u5feb\u6a02\u5929\u5802\u300d\u9019\u9996\u6b4c\u3002\u9019\u88e1\u7684\u662f\u5426\u5145\u6eff\u7ae5\u8da3\uff0c\u5c31\u662f\u6b4c\u66f2\u7684\u4e00\u9805\u7279\u6027\u3002\u300c\u5feb\u6a02\u5929\u5802\u300d\u5728\u9019\u9805\u7279\u6027\u4e0a\u53ef\u80fd\u5206\u6578\u5f88\u9ad8\uff0c\u800c\u300c\u9678\u8ecd\u8ecd\u6b4c\u300d\u53ef\u80fd\u5206\u6578\u4e0d\u9ad8\u3002\u6bcf\u500b\u4f7f\u7528\u8005\u559c\u4e0d\u559c\u6b61\u7ae5\u8da3\uff0c\u5247\u662f\u8a72\u4f7f\u7528\u8005\u7684\u7279\u6027\uff0c\u674e\u56db\u53ef\u80fd\u9019\u9805\u7279\u6027\u503c\u5f88\u9ad8\uff0c\u738b\u4e94\u53ef\u80fd\u9019\u9805\u7279\u6027\u503c\u4e0d\u9ad8\u3002\u628a\u8a31\u591a\u4e0d\u540c\u7684\u7279\u6027\u5f9e\u5927\u91cf\u8cc7\u6599\u4ee5\u53ca\u984d\u5916\u8cc7\u8a0a\u4e2d\u8403\u53d6\u51fa\u4f86\u5f8c\uff0c\u60f3\u9810\u6e2c\u674e\u56db\u5c0d\u300c\u5feb\u6a02\u5929\u5802\u300d\u7684\u559c\u597d\u6642\uff0c\u53ea\u8981\u628a\u9019\u4e9b\u7279\u6027\u7684\u7b26\u5408\u5ea6\u52a0\u7e3d\u8d77\u4f86\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n

Netflix\u767e\u842c\u5927\u8cfd\u4e2d\uff0c\u9818\u5148\u7fa4\u7684\u5718\u968a\u958b\u767c\u51fa\u8a31\u591a\u65b9\u6cd5\uff0c\u53ef\u4ee5\u81ea\u52d5\u5f9e\u8cc7\u6599\u4e2d\u8403\u53d6\u51fa\u9019\u4e9b\u7279\u6027\uff0c\u800c\u57282011\u5e74\u8cc7\u6599\u63a2\u52d8\u676f\u88e1\uff0c\u53f0\u7063\u5927\u5b78\u7684\u5718\u968a\u7e3d\u5171\u4f7f\u7528\u4e86\u4e94\u5927\u985e\u7684\u65b9\u6cd5\u4f86\u5206\u6790\u8cc7\u6599\u4e26\u505a\u51fa\u9810\u6e2c\uff0c\u5206\u5225\u662f\u82b3\u9130\u6cd5\u3001\u77e9\u9663\u56e0\u5f0f\u5206\u89e3\uff08matrix factorization\uff0c\u5305\u62ec\u5947\u7570\u503c\u5206\u89e3\u6cd5\uff09\u3001\u9650\u5236\u578b\u6ce2\u8332\u66fc\u6a5f\uff08restricted Boltzmann machine\uff0c\u9019\u662f\u4e00\u7a2e\u57fa\u65bc\u985e\u795e\u7d93\u7db2\u7d61\u7684\u7279\u6027\u8403\u53d6\u6cd5\uff09\u3001\u6a5f\u7387\u5f0f\u6f5b\u5728\u8a9e\u610f\u5206\u6790\uff08probabilistic latent semantic analysis\uff0c\u4e00\u7a2e\u57fa\u65bc\u6a5f\u7387\u6a21\u578b\u7684\u7279\u6027\u8403\u53d6\u6cd5\uff09\u3001\u76e3\u7763\u5f0f\u8ff4\u6b78\u5206\u6790\uff08supervised regression\uff0c\u53ef\u4ee5\u770b\u6210\u662f\u50b3\u7d71\u7d71\u8a08\u5b78\u4e2d\u7dda\u6027\u8ff4\u6b78\u6cd5\u7684\u5ef6\u4f38\uff09\u3002<\/p>\n

\u5728\u9019\u4e94\u5927\u985e\u65b9\u6cd5\u4e2d\uff0c\u8868\u73fe\u6700\u597d\u7684\u55ae\u4e00\u65b9\u6cd5\u662f\u77e9\u9663\u56e0\u5f0f\u5206\u89e3\uff0c\u5b83\u6240\u9810\u6e2c\u51fa\u4f86\u7684\u5206\u6578\u548c\u5be6\u969b\u5206\u6578\u7684\u5747\u65b9\u6839\u8aa4\u5dee\u662f22.9022\uff0c\u4e5f\u5c31\u662f\u8aaa\uff0c\u5982\u679c\u9019\u500b\u65b9\u6cd5\u9810\u6e2c\u4f60\u5c0d\u67d0\u9996\u6b4c\u7684\u559c\u597d\u5ea6\u662f70\u5206\u7684\u8a71\uff0c\u4f60\u5be6\u969b\u7684\u559c\u597d\u5ea6\u5927\u6982\u6703\u843d\u572847~93\u5206\u4e4b\u9593\u3002\u9019\u6a23\u7684\u8aa4\u5dee\u770b\u4f3c\u5f88\u5927\uff0c\u5728\u9019\u500b\u6bd4\u8cfd\u4e2d\uff0c\u537b\u5df2\u7d93\u662f\u5f88\u4e0d\u5bb9\u6613\u7684\u6210\u7e3e\u3002\u6700\u5f8c\u53f0\u7063\u5927\u5b78\u62ff\u5230\u7b2c\u4e00\u540d\u7684\u89e3\u6cd5\uff0c\u5747\u65b9\u6839\u8aa4\u5dee\u662f21.0147\u3002\u5f9e22.9022\u9032\u6b65\u523021.0147\u7684\u80cc\u5f8c\uff0c\u662f\u6578\u500b\u6708\u7684\u52aa\u529b\u4ee5\u53ca\u8a31\u591a\u5148\u9032\u7684\u6a5f\u5668\u5b78\u7fd2\u6280\u5de7\u3002<\/p>\n

\u53f0\u5927\u5718\u968a\u7531\u6797\u667a\u4ec1\u6559\u6388\u3001\u6797\u5b88\u5fb7\u6559\u6388\u548c\u6211\u3001\u4e09\u4f4d\u52a9\u6559\u53ca19\u4f4d\u5b78\u751f\u7d44\u6210\u300225\u540d\u5e2b\u751f\u5c0d\u65bc\u9019\u7a2e\u300c\u5354\u540c\u7be9\u9078\u300d\u7684\u554f\u984c\uff0c\u5728\u4e00\u958b\u59cb\u5176\u5be6\u90fd\u662f\u65b0\u624b\uff1b\u76f8\u53cd\u5730\uff0c\u8a31\u591a\u53c3\u52a0\u904eNetflix\u767e\u842c\u5927\u8cfd\u7684\u968a\u4f0d\uff0c\u7d93\u9a57\u90fd\u8c50\u5bcc\u5f97\u591a\u3002\u6bd4\u8cfd\u96d6\u71363\u670815\u65e5\u624d\u958b\u59cb\uff0c\u53f0\u5927\u7684\u5718\u968a\u5f9e\u524d\u4e00\u5e74\u768411\u6708\u5c31\u958b\u59cb\u62db\u5175\u8cb7\u99ac\uff0c\u4e26\u572811\u670830\u65e5\u6b63\u5f0f\u6210\u8ecd\uff0c\u5229\u7528\u4e0a\u5b78\u671f\u7684\u5b78\u671f\u672b\u53ca\u5bd2\u5047\u7684\u6642\u9593\uff0c\u5927\u91cf\u95b1\u8b80\u76f8\u95dc\u6587\u737b\u4ee5\u9032\u5165\u72c0\u6cc1\u3002\u4e26\u7531\u4e09\u4f4d\u6307\u5c0e\u8001\u5e2b\u5728\u4e0b\u5b78\u671f\u958b\u8a2d\u300c\u6a5f\u5668\u5b78\u7fd2\u7684\u7406\u8ad6\u8207\u5be6\u52d9\u300d\u7684\u8ab2\u7a0b\uff0c\u505a\u70ba\u53c3\u52a0\u9019\u9805\u6bd4\u8cfd\u7684\u5e73\u53f0\u3002<\/p>\n

\u5805\u6301\u5230\u5e95\uff0c\u7d55\u4e0d\u653e\u68c4<\/strong><\/p>\n

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\u9760\u8457\u5206\u7d44\u7684\u7b56\u7565\u53ca\u6240\u6709\u6210\u54e1\u7684\u52aa\u529b\uff0c\u8b93\u53f0\u5927\u5718\u968a\u5728\u5ee3\u5ea6\u4e0a\u53d6\u5f97\u4e86\u512a\u52e2\u3002\u5728\u6bd4\u8cfd\u7684\u4e2d\u671f\uff0c\u53f0\u5927\u5718\u968a\u9760\u8457\u5ee3\u6cdb\u5617\u8a66\u9019\u4e94\u5927\u985e\u65b9\u6cd5\u4e26\u52a0\u4ee5\u6539\u5584\uff0c\u7a69\u5b9a\u7dad\u6301\u5728\u524d\u4e94\u540d\uff0c\u537b\u4f3c\u4e4e\u96e3\u4ee5\u8d85\u8d8aCommendo\u4e00\u679d\u7368\u79c0\u7684\u6c23\u52e2\u3002<\/p>\n

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