{"id":41167,"date":"2020-09-26T23:25:03","date_gmt":"2020-09-26T15:25:03","guid":{"rendered":"http:\/\/www.zhushiyao.com\/?p=41167"},"modified":"2020-09-27T00:18:59","modified_gmt":"2020-09-26T16:18:59","slug":"6a1e7c6aee","status":"publish","type":"post","link":"http:\/\/www.zhushiyao.com\/?p=41167","title":{"rendered":"23 \u5f20\u56fe\u89e3\uff0c\u5e26\u4f60\u5165\u95e8\u63a8\u8350\u7cfb\u7edf"},"content":{"rendered":"
\n
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\"23<\/p>\n

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\"23<\/p>\n

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1. \u63a8\u8350\u7cfb\u7edf\u5230\u5e95\u89e3\u51b3\u7684\u662f\u4ec0\u4e48\u95ee\u9898\uff1f<\/span><\/span><\/p>\n

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\"23<\/p>\n

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2. \u63a8\u8350\u7cfb\u7edf\u7684\u5e94\u7528\u573a\u666f<\/span><\/span><\/section>\n
\n

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    \n
  • \n
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  • \n
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  • \n
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  • \n
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  • \n
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    \"23<\/p>\n

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      \n
    • \n
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    • \n

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      <\/section>\n<\/li>\n<\/ul>\n
      3. \u641c\u7d22\u3001\u63a8\u8350\u3001\u5e7f\u544a\u4e09\u8005\u7684\u5f02\u540c<\/span><\/span><\/section>\n
      \n

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        \n
      • \n
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      • \n

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      • \n

        \u5e7f\u544a\uff1a<\/span><\/strong><\/span>\u501f\u52a9\u641c\u7d22\u548c\u63a8\u8350\u6280\u672f\u5b9e\u73b0\u5e7f\u544a\u7684\u7cbe\u51c6<\/span>\u6295\u653e\uff0c\u53ef\u4ee5\u5c06\u5e7f\u544a\u7406\u89e3\u6210\u641c\u7d22\u63a8\u8350\u7684\u4e00\u79cd\u5e94\u7528\u573a\u666f\uff0c\u6280\u672f\u65b9\u6848\u66f4\u590d\u6742\uff0c\u6d89\u53ca\u5230\u667a\u80fd\u9884\u7b97\u63a7\u5236\u3001\u5e7f\u544a\u7ade\u4ef7\u7b49\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n<\/section>\n<\/section>\n

        02 \u63a8\u8350\u7cfb\u7edf\u7684\u6574\u4f53\u67b6\u6784<\/span><\/p>\n

        \"23<\/p>\n

        \u63a8\u8350\u7cfb\u7edf\u7684\u6574\u4f53\u67b6\u6784<\/span><\/p>\n

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          \n
        • \n
          \u6570\u636e\u6e90\uff1a<\/strong><\/span>\u63a8\u8350\u7b97\u6cd5\u6240\u4f9d\u8d56\u7684\u5404\u79cd\u6570\u636e\u6e90\uff0c\u5305\u62ec\u7269\u54c1\u6570\u636e\u3001\u7528\u6237\u6570\u636e\u3001\u884c\u4e3a\u65e5\u5fd7\u3001\u5176\u4ed6\u53ef\u5229\u7528\u7684\u4e1a\u52a1\u6570\u636e\u3001\u751a\u81f3\u516c\u53f8\u5916\u90e8\u7684\u6570\u636e\u3002<\/section>\n<\/li>\n
        • \n

          \u8ba1\u7b97\u5e73\u53f0\uff1a<\/strong><\/span>\u8d1f\u8d23\u5bf9\u5e95\u5c42\u7684\u5404\u79cd\u5f02\u6784\u6570\u636e\u8fdb\u884c\u6e05\u6d17\u3001\u52a0\u5de5\uff0c\u79bb\u7ebf\u8ba1\u7b97\u548c\u5b9e\u65f6\u8ba1\u7b97\u3002<\/span><\/p>\n<\/li>\n

        • \n

          \u6570\u636e\u5b58\u50a8\u5c42\uff1a<\/strong>\u5b58\u50a8<\/span>\u8ba1\u7b97\u5e73\u53f0\u5904\u7406\u540e\u7684\u6570\u636e\uff0c\u6839\u636e\u9700\u8981\u53ef\u843d\u5730\u5230\u4e0d\u540c\u7684\u5b58\u50a8\u7cfb\u7edf\u4e2d\uff0c\u6bd4\u5982Redis\u4e2d\u53ef\u4ee5\u5b58\u50a8\u7528\u6237\u7279\u5f81\u548c\u7528\u6237\u753b\u50cf\u6570\u636e\uff0cES\u4e2d\u53ef\u4ee5\u7528\u6765\u7d22\u5f15\u7269\u54c1\u6570\u636e\uff0cFaiss\u4e2d\u53ef\u4ee5\u5b58\u50a8\u7528\u6237\u6216\u8005\u7269\u54c1\u7684embedding\u5411\u91cf\u7b49\u3002<\/span><\/p>\n<\/li>\n

        • \n

          \u53ec\u56de\u5c42\uff1a<\/span><\/strong><\/span>\u5305\u62ec\u5404\u79cd\u63a8\u8350\u7b56\u7565\u6216\u8005\u7b97\u6cd5\uff0c\u6bd4\u5982\u7ecf\u5178\u7684\u534f\u540c\u8fc7\u6ee4\uff0c\u57fa\u4e8e\u5185\u5bb9\u7684\u53ec\u56de\uff0c\u57fa\u4e8e\u5411\u91cf\u7684\u53ec\u56de\uff0c\u7528\u4e8e\u6258\u5e95\u7684\u70ed\u95e8\u63a8\u8350\u7b49\u3002\u4e3a\u4e86\u5e94\u5bf9\u7ebf\u4e0a\u9ad8\u5e76\u53d1\u7684\u6d41\u91cf\uff0c\u53ec\u56de\u7ed3\u679c\u901a\u5e38\u4f1a\u9884\u8ba1\u7b97\u597d\uff0c\u5efa\u7acb\u597d\u5012\u6392\u7d22\u5f15\u540e\u5b58\u5165\u7f13\u5b58\u4e2d\u3002<\/span><\/p>\n<\/li>\n

        • \n

          \u878d\u5408\u8fc7\u6ee4\u5c42\uff1a<\/span><\/strong><\/span>\u89e6\u53d1\u591a\u8def\u53ec\u56de\uff0c\u7531\u4e8e\u53ec\u56de\u5c42\u7684\u6bcf\u4e2a\u53ec\u56de\u6e90\u90fd\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5019\u9009\u96c6\uff0c\u56e0\u6b64\u8fd9\u4e00\u5c42\u9700\u8981\u8fdb\u884c\u878d\u5408\u548c\u8fc7\u6ee4\u3002<\/span><\/p>\n<\/li>\n

        • \n

          \u6392\u5e8f\u5c42\uff1a<\/span><\/strong><\/span>\u5229\u7528\u673a\u5668\u5b66\u4e60\u6216\u8005\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b\uff0c\u4ee5\u53ca\u66f4\u4e30\u5bcc\u7684\u7279\u5f81\u8fdb\u884c\u91cd\u6392\u5e8f\uff0c\u7b5b\u9009\u51fa\u66f4\u5c0f\u3001\u66f4\u7cbe\u51c6\u7684\u63a8\u8350\u96c6\u5408\u8fd4\u56de\u7ed9\u4e0a\u5c42\u4e1a\u52a1\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

          \u4ece\u6570\u636e\u5b58\u50a8\u5c42\u5230\u53ec\u56de\u5c42\u3001\u518d\u5230\u878d\u5408\u8fc7\u6ee4\u5c42\u548c\u6392\u5e8f\u5c42\uff0c\u5019\u9009\u96c6\u9010\u5c42\u51cf\u5c11\uff0c\u4f46\u662f\u7cbe\u51c6\u6027\u8981\u6c42\u8d8a\u6765\u8d8a\u9ad8\uff0c\u56e0\u6b64\u4e5f\u5e26\u6765\u4e86<\/span>\u8ba1\u7b97\u590d\u6742\u5ea6\u7684\u9010\u5c42\u589e\u52a0\uff0c\u8fd9\u4e2a\u4fbf\u662f\u63a8\u8350\u7cfb\u7edf\u7684\u6700\u5927\u6311\u6218\u3002<\/span><\/section>\n
          \u5176\u5b9e\u5bf9\u4e8e\u63a8\u8350\u5f15\u64ce\u6765\u8bf4\uff0c\u6700\u6838\u5fc3\u7684\u90e8\u5206\u4e3b\u8981\u662f\u4e24\u5757\uff1a\u7279\u5f81\u548c\u7b97\u6cd5\u3002<\/span><\/section>\n

          \"23<\/p>\n

          \u63a8\u8350\u5f15\u64ce\u7684\u6838\u5fc3\u529f\u80fd\u548c\u6280\u672f\u65b9\u6848<\/span><\/p>\n

          \u7279\u5f81\u8ba1\u7b97\u7531\u4e8e\u6570\u636e\u91cf\u5927\uff0c\u901a\u5e38\u91c7\u7528\u5927\u6570\u636e\u7684\u79bb\u7ebf\u548c\u5b9e\u65f6\u5904\u7406\u6280\u672f\uff0c\u50cfSpark\u3001Flink\u7b49\uff0c\u7136\u540e\u5c06\u8ba1\u7b97\u7ed3\u679c\u4fdd\u5b58\u5728Redis\u6216\u8005\u5176\u4ed6\u5b58\u50a8\u7cfb\u7edf\u4e2d\uff08\u6bd4\u5982HBase\u3001MongoDB\u6216\u8005ES\uff09\uff0c\u4f9b\u53ec\u56de\u548c\u6392\u5e8f\u6a21\u5757\u4f7f\u7528\u3002<\/span><\/section>\n
          \u53ec\u56de\u7b97\u6cd5\u7684\u4f5c\u7528\u662f\uff1a\u4ece\u6d77\u91cf\u6570\u636e\u4e2d\u5feb\u901f\u83b7\u53d6\u4e00\u6279\u5019\u9009\u6570\u636e\uff0c\u8981\u6c42\u662f\u5feb\u548c\u5c3d\u53ef\u80fd\u7684\u51c6\u3002\u8fd9\u4e00\u5c42\u901a\u5e38\u6709\u4e30\u5bcc\u7684\u7b56\u7565\u548c\u7b97\u6cd5\uff0c\u7528\u6765\u786e\u4fdd\u591a\u6837\u6027\uff0c\u4e3a\u4e86\u66f4\u597d\u7684\u63a8\u8350\u6548\u679c\uff0c\u67d0\u4e9b\u7b97\u6cd5\u4e5f\u4f1a\u505a\u6210\u8fd1\u5b9e\u65f6\u7684\u3002<\/span><\/section>\n
          \u6392\u5e8f\u7b97\u6cd5\u7684\u4f5c\u7528\u662f\uff1a\u5bf9\u591a\u8def\u53ec\u56de\u7684\u5019\u9009\u96c6\u8fdb\u884c\u7cbe\u7ec6\u5316\u6392\u5e8f\u3002\u5b83\u4f1a\u5229\u7528\u7269\u54c1\u3001\u7528\u6237\u4ee5\u53ca\u5b83\u4eec\u4e4b\u95f4\u7684\u4ea4\u53c9\u7279\u5f81\uff0c\u7136\u540e\u901a\u8fc7\u590d\u6742\u7684\u673a\u5668\u5b66\u4e60\u6216\u8005\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b\u8fdb\u884c\u6253\u5206\u6392\u5e8f\uff0c\u8fd9\u4e00\u5c42\u7684\u7279\u70b9\u662f\u8ba1\u7b97\u590d\u6742\u4f46\u662f\u7ed3\u679c\u66f4\u7cbe\u51c6\u3002<\/span><\/section>\n

          03\u00a0\u56fe\u89e3\u7ecf\u5178\u7684\u534f\u540c\u8fc7\u6ee4\u7b97\u6cd5<\/span><\/p>\n

          \u4e86\u89e3\u4e86\u63a8\u8350\u7cfb\u7edf\u7684\u6574\u4f53\u67b6\u6784\u548c\u6280\u672f\u65b9\u6848\u540e\uff0c\u4e0b\u9762\u5e26\u5927\u5bb6\u6df1\u5165\u4e00\u4e0b\u7b97\u6cd5\u7ec6\u8282\u3002\u8fd9\u91cc\u9009\u62e9\u56fe\u89e3\u7684\u662f\u63a8\u8350\u7cfb\u7edf\u4e2d\u7684\u660e\u661f\u7b97\u6cd5\uff1a\u534f\u540c\u8fc7\u6ee4\uff08Collaborative Filtering\uff0cCF\uff09\u3002<\/span><\/span><\/span><\/section>\n
          \u5bf9\u4e8e\u5de5\u7a0b\u540c\u5b66\u6765\u8bf4\uff0c\u53ef\u80fd\u89c9\u5f97 AI \u7b97\u6cd5\u6666\u6da9\u96be\u61c2\uff0c\u95e8\u69db\u592a\u9ad8\uff0c\u786e\u5b9e\u5f88\u591a\u6df1\u5ea6\u5b66\u4e60\u7b97\u6cd5\u7684\u786e\u662f\u8fd9\u6837\uff0c\u4f46\u662f\u534f\u540c\u8fc7\u6ee4\u5374\u662f\u4e00\u4e2a\u7b80\u5355\u540c\u65f6\u6548\u679c\u5f88\u597d\u7684\u7b97\u6cd5\uff0c\u53ea\u8981\u4f60\u6709\u521d\u4e2d\u6570\u5b66\u7684\u57fa\u7840\u5c31\u80fd\u770b\u61c2\u3002<\/span><\/span><\/section>\n

          1. \u534f\u540c\u8fc7\u6ee4\u662f\u4ec0\u4e48\uff1f<\/span><\/span><\/p>\n

          \u534f\u540c\u8fc7\u6ee4\u7b97\u6cd5\u7684\u6838\u5fc3\u5c31\u662f\u300c<\/span>\u627e\u76f8\u4f3c\u300d<\/span>\uff0c\u5b83\u57fa\u4e8e\u7528\u6237\u7684\u5386\u53f2\u884c\u4e3a\uff08\u6d4f\u89c8\u3001\u6536\u85cf\u3001\u8bc4\u8bba\u7b49\uff09\uff0c\u53bb\u53d1\u73b0\u7528\u6237\u5bf9\u7269\u54c1\u7684\u559c\u597d\uff0c\u5e76\u5bf9\u559c\u597d\u8fdb\u884c\u5ea6\u91cf\u548c\u6253\u5206\uff0c\u6700\u7ec8\u7b5b\u9009\u51fa\u63a8\u8350\u96c6\u5408\u3002\u5b83\u53c8\u5305\u62ec\u4e24\u4e2a\u5206\u652f\uff1a<\/span><\/p>\n

            \n
          • \n
            \u57fa\u4e8e\u7528\u6237\u7684\u534f\u540c\u8fc7\u6ee4\uff1a<\/strong>User-CF\uff0c\u6838\u5fc3\u662f\u627e\u76f8\u4f3c\u7684\u4eba\u3002\u6bd4\u5982\u4e0b\u56fe\u4e2d\uff0c<\/span>\u7528\u6237 A \u548c\u7528\u6237 C \u90fd\u8d2d\u4e70\u8fc7\u7269\u54c1 a \u548c\u7269\u54c1 b\uff0c\u90a3\u4e48\u53ef\u4ee5\u8ba4\u4e3a A \u548c C \u662f\u76f8\u4f3c\u7684\uff0c\u56e0\u4e3a\u4ed6\u4eec\u5171\u540c\u559c\u6b22\u7684\u7269\u54c1\u591a\u3002\u8fd9\u6837\uff0c\u5c31\u53ef\u4ee5\u5c06\u7528\u6237 A \u8d2d\u4e70\u8fc7\u7684\u7269\u54c1 d \u63a8\u8350\u7ed9\u7528\u6237 C<\/span>\u3002<\/span><\/section>\n<\/li>\n<\/ul>\n

            \"23<\/p>\n

            \u57fa\u4e8e\u7528\u6237\u7684\u534f\u540c\u8fc7\u6ee4<\/span>\u793a\u4f8b<\/span><\/p>\n

              \n
            • \n

              \u57fa\u4e8e\u7269\u54c1\u7684\u534f\u540c\u8fc7\u6ee4\uff1a<\/strong>Item-CF\uff0c<\/span>\u6838\u5fc3\u662f\u627e\u76f8\u4f3c\u7684\u7269\u54c1\u3002\u6bd4\u5982\u4e0b\u56fe\u4e2d\uff0c\u7269\u54c1 a \u548c\u7269\u54c1 b \u540c\u65f6\u88ab\u7528\u6237 A\uff0cB\uff0cC \u8d2d\u4e70\u4e86\uff0c\u90a3\u4e48\u7269\u54c1 a \u548c \u7269\u54c1 b \u88ab\u8ba4\u4e3a\u662f\u76f8\u4f3c\u7684\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684\u5171\u73b0\u6b21\u6570\u5f88\u9ad8\u3002\u8fd9\u6837\uff0c\u5982\u679c\u7528\u6237 D \u8d2d\u4e70\u4e86\u7269\u54c1 a\uff0c\u5219\u53ef\u4ee5\u5c06\u548c\u7269\u54c1 a \u6700\u76f8\u4f3c\u7684\u7269\u54c1 b \u63a8\u8350\u7ed9\u7528\u6237 D\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

              \"23<\/section>\n
              \u57fa\u4e8e\u7269\u54c1\u7684\u534f\u540c\u8fc7\u6ee4<\/span>\u793a\u4f8b<\/span><\/section>\n
              2. \u5982\u4f55\u627e\u76f8\u4f3c\uff1f<\/span><\/span><\/section>\n
              \n

              \u524d\u9762\u8bb2\u5230\uff0c\u534f\u540c\u8fc7\u6ee4\u7684\u6838\u5fc3\u5c31\u662f\u627e\u76f8\u4f3c\uff0cUser-CF\u662f\u627e\u7528\u6237\u4e4b\u95f4\u7684\u76f8\u4f3c\uff0cItem-CF\u662f\u627e\u7269\u54c1\u4e4b\u95f4\u7684\u76f8\u4f3c\uff0c\u90a3\u5230\u5e95\u5982\u4f55\u8861\u91cf\u4e24\u4e2a\u7528\u6237\u6216\u8005\u7269\u54c1\u4e4b\u95f4\u7684\u76f8\u4f3c\u6027\u5462\uff1f<\/span><\/p>\n

              \u6211\u4eec\u90fd\u77e5\u9053\uff0c\u5bf9\u4e8e\u5750\u6807\u4e2d\u7684\u4e24\u4e2a\u70b9\uff0c\u5982\u679c\u5b83\u4eec\u4e4b\u95f4\u7684\u5939\u89d2\u8d8a\u5c0f\uff0c\u8fd9\u4e24\u4e2a\u70b9\u8d8a\u76f8\u4f3c\uff0c\u8fd9\u5c31\u662f\u521d\u4e2d\u5b66\u8fc7\u7684\u4f59\u5f26\u8ddd\u79bb\uff0c\u5b83\u7684\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a
              \n<\/span><\/p>\n

              \"23<\/p>\n

              \u4e3e\u4e2a\u4f8b\u5b50\uff0cA\u5750\u6807\u662f\uff080\uff0c3\uff0c1\uff09\uff0cB\u5750\u6807\u662f\uff084\uff0c3\uff0c0\uff09\uff0c\u90a3\u4e48\u8fd9\u4e24\u4e2a\u70b9\u7684\u4f59\u5f26\u8ddd\u79bb\u662f0.569\uff0c\u4f59\u5f26\u8ddd\u79bb\u8d8a\u63a5\u8fd11\uff0c\u8868\u793a\u5b83\u4eec\u8d8a\u76f8\u4f3c\u3002<\/p>\n

              \"23<\/p>\n

              \u9664\u4e86\u4f59\u5f26\u8ddd\u79bb\uff0c\u8861\u91cf\u76f8\u4f3c\u6027\u7684\u65b9\u6cd5\u8fd8\u6709\u5f88\u591a\u79cd\uff0c\u6bd4\u5982\uff1a\u6b27\u5f0f\u8ddd\u79bb\u3001\u76ae\u5c14\u900a\u76f8\u5173\u7cfb\u6570\u3001Jaccard \u76f8\u4f3c\u7cfb\u6570\u7b49\u7b49\uff0c\u8fd9\u91cc\u4e0d\u505a\u5c55\u5f00\uff0c\u53ea\u662f\u8ba1\u7b97\u516c\u5f0f\u4e0a\u7684\u5dee\u5f02\u800c\u5df2\u3002<\/span><\/section>\n
              <\/section>\n
              3. Item-CF\u7684\u7b97\u6cd5\u6d41\u7a0b<\/span><\/span><\/section>\n
              \n

              \u6e05\u695a\u4e86\u76f8\u4f3c\u6027\u7684\u5b9a\u4e49\u540e\uff0c\u4e0b\u9762\u4ee5Item-CF\u4e3a\u4f8b\uff0c\u8be6\u7ec6\u8bf4\u4e0b\u8fd9\u4e2a\u7b97\u6cd5\u5230\u5e95\u662f\u5982\u4f55\u9009\u51fa\u63a8\u8350\u7269\u54c1\u7684\uff1f<\/span><\/p>\n<\/section>\n

              \u7b2c\u4e00\u6b65\uff1a\u6574\u7406\u7269\u54c1\u7684\u5171\u73b0\u77e9\u9635<\/span><\/strong><\/span><\/p>\n

              \u5047\u8bbe\u6709 A\u3001B\u3001C\u3001D\u3001E 5\u4e2a\u7528\u6237\uff0c\u5176\u4e2d\u7528\u6237 A \u559c\u6b22\u7269\u54c1 a\u3001b\u3001c\uff0c\u7528\u6237 B \u559c\u6b22\u7269\u54c1 a\u3001b\u7b49\u7b49\u3002<\/span><\/span><\/span><\/section>\n

              \"23<\/p>\n

              \u6240\u8c13\u5171\u73b0\uff0c\u5373\uff1a\u4e24\u4e2a\u7269\u54c1\u88ab\u540c\u4e00\u4e2a\u7528\u6237\u559c\u6b22\u4e86\u3002\u6bd4\u5982\u7269\u54c1 a \u548c b\uff0c\u7531\u4e8e\u4ed6\u4eec\u540c\u65f6\u88ab\u7528\u6237 A\u3001B\u3001C \u559c\u6b22\uff0c\u6240\u4ee5 a \u548c b \u7684\u5171\u73b0\u6b21\u6570\u662f3\uff0c\u91c7\u7528\u8fd9\u79cd\u7edf\u8ba1\u65b9\u6cd5\u5c31\u53ef\u4ee5\u5feb\u901f\u6784\u5efa\u51fa\u5171\u73b0\u77e9\u9635\u3002<\/span><\/section>\n

              \u00a0<\/span><\/p>\n

              \u7b2c\u4e8c\u6b65\uff1a\u8ba1\u7b97\u7269\u54c1\u7684\u76f8\u4f3c\u5ea6\u77e9\u9635<\/span><\/strong><\/p>\n

              \u5bf9\u4e8e Item-CF \u7b97\u6cd5\u6765\u8bf4\uff0c\u4e00\u822c\u4e0d\u91c7\u7528\u524d\u9762\u63d0\u5230\u7684\u4f59\u5f26\u8ddd\u79bb\u6765\u8861\u91cf\u7269\u54c1\u7684\u76f8\u4f3c\u5ea6\uff0c\u800c\u662f\u91c7\u7528\u4e0b\u9762\u7684\u516c\u5f0f<\/span>\uff1a<\/span><\/section>\n

              \"23<\/p>\n

              \u5176\u4e2d\uff0cN(u) \u8868\u793a\u559c\u6b22\u7269\u54c1 u \u7684\u7528\u6237\u6570\uff0cN(v) \u8868\u793a\u559c\u6b22\u7269\u54c1 v \u7684\u7528\u6237\u6570\uff0c\u4e24\u8005\u7684\u4ea4\u96c6\u8868\u793a\u540c\u65f6\u559c\u6b22\u7269\u54c1 u \u548c\u7269\u54c1 v \u7684\u7528\u6237\u6570\u3002\u5f88\u663e\u7136\uff0c\u5982\u679c\u4e24\u4e2a\u7269\u54c1\u540c\u65f6\u88ab\u5f88\u591a\u4eba\u559c\u6b22\uff0c\u90a3\u4e48\u8fd9\u4e24\u4e2a\u7269\u54c1\u8d8a\u76f8\u4f3c\u3002<\/span><\/section>\n

              \u57fa\u4e8e\u7b2c1\u6b65\u8ba1\u7b97\u51fa\u6765\u7684\u5171\u73b0\u77e9\u9635\u4ee5\u53ca\u6bcf\u4e2a\u7269\u54c1\u7684\u559c\u6b22\u4eba\u6570\uff0c\u4fbf\u53ef\u4ee5\u6784\u9020\u51fa\u7269\u54c1\u7684\u76f8\u4f3c\u5ea6\u77e9\u9635\uff1a<\/span><\/p>\n

              \"23<\/p>\n

              \u7b2c\u4e09\u6b65\uff1a\u63a8\u8350\u7269\u54c1<\/span><\/strong><\/section>\n
              \u6700\u540e\u4e00\u6b65\uff0c\u4fbf\u53ef\u4ee5\u57fa\u4e8e\u76f8\u4f3c\u5ea6\u77e9\u9635\u63a8\u8350\u7269\u54c1\u4e86\uff0c\u516c\u5f0f\u5982\u4e0b\uff1a<\/span><\/span><\/section>\n

              \"23<\/p>\n

              \u5176\u4e2d\uff0cP<\/span>uj <\/span>\u8868\u793a\u7528\u6237 u \u5bf9\u7269\u54c1 j \u7684\u611f\u5174\u8da3\u7a0b\u5ea6\uff0c\u503c\u8d8a\u5927\uff0c\u8d8a\u503c\u5f97\u88ab\u63a8\u8350\u3002N(u) \u8868\u793a\u7528\u6237 u \u611f\u5174\u8da3\u7684\u7269\u54c1\u96c6\u5408\uff0cS(j,N) \u8868\u793a\u548c\u7269\u54c1 j \u6700\u76f8\u4f3c\u7684\u524d N \u4e2a\u7269\u54c1\uff0cW<\/span>ij <\/span>\u8868\u793a\u7269\u54c1 i \u548c\u7269\u54c1 j \u7684\u76f8\u4f3c\u5ea6\uff0cR<\/span>ui\u00a0<\/span>\u8868\u793a\u7528\u6237 u \u5bf9\u7269\u54c1 i \u7684\u5174\u8da3\u5ea6\u3002<\/span><\/section>\n

              \u4e0a\u9762\u7684\u516c\u5f0f\u6709\u70b9\u62bd\u8c61\uff0c\u76f4\u63a5\u770b\u4f8b\u5b50\u66f4\u5bb9\u6613\u7406\u89e3\uff0c\u5047\u8bbe\u6211\u8981\u7ed9\u7528\u6237 E \u63a8\u8350\u7269\u54c1\uff0c\u524d\u9762\u6211\u4eec\u5df2\u7ecf\u77e5\u9053\u7528\u6237 E \u559c\u6b22\u7269\u54c1 b \u548c\u7269\u54c1 c\uff0c\u559c\u6b22\u7a0b\u5ea6\u5047\u8bbe\u5206\u522b\u4e3a 0.6 \u548c 0.4\u3002\u90a3\u4e48\uff0c\u5229\u7528\u4e0a\u9762\u7684\u516c\u5f0f\u8ba1\u7b97\u51fa\u6765\u7684\u63a8\u8350\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n

              \"23<\/p>\n

              \u56e0\u4e3a\u7269\u54c1 b \u548c\u7269\u54c1 c \u5df2\u7ecf\u88ab\u7528\u6237 E \u559c\u6b22\u8fc7\u4e86\uff0c\u6240\u4ee5\u4e0d\u518d\u91cd\u590d\u63a8\u8350\u3002\u6700\u7ec8\u5bf9\u6bd4\u7528\u6237 E \u5bf9\u7269\u54c1 a \u548c\u7269\u54c1 d \u7684\u611f\u5174<\/span>\u8da3\u7a0b\u5ea6<\/span>\uff0c\u56e0\u4e3a 0.682 > 0.3\uff0c\u56e0\u6b64\u9009\u62e9\u63a8\u8350\u7269\u54c1 a\u3002<\/section>\n

              04\u00a0\u4ece0\u52301\u642d\u5efa\u4e00\u4e2a\u63a8\u8350\u7cfb\u7edf<\/span><\/p>\n

              \u6709\u4e86\u4e0a\u9762\u7684\u7406\u8bba\u57fa\u7840\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u7528 Python \u5feb\u901f\u5b9e\u73b0\u51fa\u4e00\u4e2a\u63a8\u8350\u7cfb\u7edf\u3002<\/span><\/span><\/span><\/section>\n

              1. \u9009\u62e9\u6570\u636e\u96c6<\/span><\/span><\/p>\n

              \u8fd9\u91cc\u91c7\u7528\u7684\u662f\u63a8\u8350\u9886\u57df\u975e\u5e38\u7ecf\u5178\u7684 MovieLens \u6570\u636e\u96c6\uff0c\u5b83\u662f\u4e00\u4e2a\u5173\u4e8e\u7535\u5f71\u8bc4\u5206\u7684\u6570\u636e\u96c6\uff0c\u5b98\u7f51\u4e0a\u63d0\u4f9b\u4e86\u591a\u4e2a\u4e0d\u540c\u5927\u5c0f\u7684\u7248\u672c\uff0c\u4e0b\u9762\u4ee5 ml-1m \u6570\u636e\u96c6\uff08\u5927\u7ea6100\u4e07\u6761\u7528\u6237\u8bc4\u5206\u8bb0\u5f55\uff09\u4e3a\u4f8b\u3002<\/span><\/p>\n

              \u4e0b\u8f7d\u89e3\u538b\u540e\uff0c\u6587\u4ef6\u5939\u4e2d\u5305\u542b\uff1aratings.dat\u3001movies.dat\u3001users.dat 3\u4e2a\u6587\u4ef6\uff0c\u51716040\u4e2a\u7528\u6237\uff0c3900\u90e8\u7535\u5f71\uff0c1000209\u6761\u8bc4\u5206\u8bb0\u5f55\u3002\u5404\u4e2a\u6587\u4ef6\u7684\u683c\u5f0f\u90fd\u662f\u4e00\u6837\u7684\uff0c\u6bcf\u884c\u8868\u793a\u4e00\u6761\u8bb0\u5f55\uff0c\u5b57\u6bb5\u4e4b\u95f4<\/span>\u91c7\u7528 :: \u8fdb\u884c\u5206\u5272\u3002<\/span><\/p>\n

              \u4ee5ratings.dat\u4e3a\u4f8b\uff0c\u6bcf\u4e00\u884c\u5305\u62ec4\u4e2a\u5c5e\u6027\uff1a<\/span>UserID, MovieID, Rating, Timestamp\u3002<\/span>\u901a\u8fc7\u811a\u672c\u53ef\u4ee5\u7edf\u8ba1\u51fa\u4e0d\u540c\u8bc4\u5206\u7684\u4eba\u6570\u5206\u5e03\uff1a<\/span><\/section>\n

              \"23<\/p>\n

              2. \u8bfb\u53d6\u539f\u59cb\u6570\u636e<\/span><\/section>\n
              \n

              \u7a0b\u5e8f\u4e3b\u8981\u4f7f\u7528\u6570\u636e\u96c6\u4e2d\u7684 ratings.dat \u8fd9\u4e2a\u6587\u4ef6\uff0c\u901a\u8fc7\u89e3\u6790\u8be5\u6587\u4ef6\uff0c\u62bd\u53d6\u51fa user_id\u3001movie_id\u3001rating 3\u4e2a\u5b57\u6bb5\uff0c\u6700\u7ec8\u6784\u9020\u51fa\u7b97\u6cd5\u4f9d\u8d56\u7684\u6570\u636e\uff0c\u5e76\u4fdd\u5b58\u5728\u53d8\u91cf dataset \u4e2d\uff0c\u5b83\u7684\u683c\u5f0f\u4e3a\uff1adict[user_id][movie_id] = rate<\/span><\/p>\n

              \"23<\/p>\n

              3. \u6784\u9020\u7269\u54c1\u7684\u76f8\u4f3c\u5ea6\u77e9\u9635<\/span><\/strong><\/section>\n
              \n

              \u57fa\u4e8e\u7b2c 2 \u6b65\u7684 dataset\uff0c\u53ef\u4ee5\u8fdb\u4e00\u6b65\u7edf\u8ba1\u51fa\u6bcf\u90e8\u7535\u5f71\u7684\u8bc4\u5206\u6b21\u6570\u4ee5\u53ca\u7535\u5f71\u7684\u5171\u751f\u77e9\u9635\uff0c\u7136\u540e\u518d\u751f\u6210\u76f8\u4f3c\u5ea6\u77e9\u9635\u3002<\/span><\/p>\n

              \"23<\/p>\n

              4. \u57fa\u4e8e\u76f8\u4f3c\u5ea6\u77e9\u9635\u63a8\u8350\u7269\u54c1<\/span><\/strong><\/section>\n
              \n

              \u6700\u540e\uff0c\u53ef\u4ee5\u57fa\u4e8e\u76f8\u4f3c\u5ea6\u77e9\u9635\u8fdb\u884c\u63a8\u8350\u4e86\uff0c\u8f93\u5165\u4e00\u4e2a\u7528\u6237id\uff0c\u5148\u9488\u5bf9\u8be5\u7528\u6237\u8bc4\u5206\u8fc7\u7684\u7535\u5f71\uff0c\u4f9d\u6b21\u9009\u51fa top 10 \u6700\u76f8\u4f3c\u7684\u7535\u5f71\uff0c\u7136\u540e\u52a0\u6743\u6c42\u548c\u540e\u8ba1\u7b97\u51fa\u6bcf\u4e2a\u5019\u9009\u7535\u5f71\u7684\u6700\u7ec8\u8bc4\u5206\uff0c\u6700\u540e\u518d\u9009\u62e9\u5f97\u5206\u524d 5 \u7684\u7535\u5f71\u8fdb\u884c\u63a8\u8350<\/span>\u3002<\/span><\/p>\n

              \"23<\/p>\n

              5. \u8c03\u7528\u63a8\u8350\u7cfb\u7edf<\/span><\/strong><\/section>\n
              \n

              \u4e0b\u9762\u9009\u62e9\u00a0UserId=1 \u8fd9\u4e2a\u7528\u6237<\/span>\uff0c\u770b\u4e0b\u7a0b\u5e8f\u7684\u6267\u884c\u7ed3\u679c\u3002\u7531\u4e8e\u63a8\u8350\u7a0b\u5e8f\u8f93\u51fa\u7684\u662f movieId \u5217\u8868\uff0c\u4e3a\u4e86\u66f4\u76f4\u89c2\u7684\u4e86\u89e3\u63a8\u8350\u7ed3\u679c\uff0c\u8fd9\u91cc\u8f6c\u6362\u6210\u7535\u5f71\u7684\u6807\u9898\u8fdb\u884c\u8f93\u51fa\u3002<\/span><\/p>\n

              \"23<\/p>\n

              \u6700\u7ec8\u63a8\u8350\u7684\u524d5\u4e2a\u7535\u5f71\u4e3a\uff1a<\/p>\n

              \"23<\/p>\n

              05\u00a0\u7ebf\u4e0a\u63a8\u8350\u7cfb\u7edf\u7684\u6311\u6218<\/span><\/p>\n

              \u901a\u8fc7\u4e0a\u9762\u7684\u4ecb\u7ecd\uff0c\u5927\u5bb6\u5bf9\u63a8\u8350\u7cfb\u7edf\u7684\u57fa\u672c\u6784\u6210\u5e94\u8be5\u6709\u4e86\u4e00\u4e2a\u521d\u6b65\u8ba4\u8bc6\uff0c\u4f46\u662f\u771f\u6b63\u8fd0\u7528\u5230\u7ebf\u4e0a\u771f\u5b9e\u73af\u5883\u65f6\uff0c\u8fd8\u4f1a\u9047\u5230\u5f88\u591a\u7b97\u6cd5\u548c\u5de5\u7a0b\u4e0a\u7684\u6311\u6218\uff0c\u7edd\u5bf9\u4e0d\u662f\u51e0\u5341\u884c Python \u4ee3\u7801\u53ef\u4ee5\u641e\u5b9a\u7684\u3002<\/span><\/p>\n

              1\u3001\u4e0a\u9762\u7684\u793a\u4f8b\u4f7f\u7528\u4e86\u6807\u51c6\u5316\u7684\u6570\u636e\u96c6\uff0c\u800c\u7ebf\u4e0a\u73af\u5883\u7684\u6570\u636e\u662f\u975e\u6807\u51c6\u5316\u7684\uff0c\u56e0\u6b64\u6d89\u53ca\u5230\u6d77\u91cf\u6570\u636e\u7684\u6536\u96c6\u3001\u6e05\u6d17\u548c\u52a0\u5de5\uff0c\u6700\u7ec8\u6784\u9020\u51fa\u6a21\u578b\u53ef\u4f7f\u7528\u7684\u6570\u636e\u96c6\u3002<\/span><\/p>\n

              2\u3001\u590d\u6742\u4e14\u7e41\u7410\u7684\u7279\u5f81\u5de5\u7a0b\uff0c\u90fd\u8bf4\u7b97\u6cd5\u6a21\u578b\u7684\u4e0a\u9650\u7531\u6570\u636e\u548c\u7279\u5f81\u51b3\u5b9a\u3002\u5bf9\u4e8e\u7ebf\u4e0a\u73af\u5883\uff0c\u9700\u8981\u4ece\u4e1a\u52a1\u89d2\u5ea6\u9009\u62e9\u51fa\u53ef\u7528\u7684\u7279\u5f81\uff0c\u7136\u540e\u5bf9\u6570\u636e\u8fdb\u884c\u6e05\u6d17\u3001\u6807\u51c6\u5316\u3001\u5f52\u4e00\u5316\u3001\u79bb\u6563\u5316\uff0c\u5e76\u901a\u8fc7\u5b9e\u9a8c\u6548\u679c\u8fdb\u4e00\u6b65\u9a8c\u8bc1\u7279\u5f81\u7684\u6709\u6548\u6027\u3002<\/span><\/p>\n

              3\u3001\u7b97\u6cd5\u590d\u6742\u5ea6\u5982\u4f55\u964d\u4f4e\uff1f\u6bd4\u5982\u4e0a\u9762\u4ecb\u7ecd\u7684Item-CF\u7b97\u6cd5\uff0c\u65f6\u95f4\u548c\u7a7a\u95f4\u590d\u6742\u5ea6\u90fd\u662fO(N\u00d7N)\uff0c\u800c\u7ebf\u4e0a\u73af\u5883\u7684\u6570\u636e\u90fd\u662f\u5343\u4e07\u751a\u81f3\u4e0a\u4ebf\u7ea7\u522b\u7684\uff0c\u5982\u679c\u4e0d\u505a\u7b97\u6cd5\u4f18\u5316\uff0c\u53ef\u80fd\u51e0\u5929\u90fd\u8dd1\u4e0d\u51fa\u6570\u636e\uff0c\u6216\u8005\u5185\u5b58\u4e2d\u6839\u672c\u653e\u4e0d\u4e0b\u5982\u6b64\u5927\u7684\u77e9\u9635\u6570\u636e\u3002<\/span><\/p>\n

              4\u3001\u5b9e\u65f6\u6027\u5982\u4f55\u6ee1\u8db3\uff1f\u56e0\u4e3a\u7528\u6237\u7684\u5174\u8da3\u968f\u7740\u4ed6\u4eec\u6700\u65b0\u7684\u884c\u4e3a\u5728\u5b9e\u65f6\u53d8\u5316\u7684\uff0c\u5982\u679c\u6a21\u578b\u53ea\u662f\u57fa\u4e8e\u5386\u53f2\u6570\u636e\u8fdb\u884c\u63a8\u8350\uff0c\u53ef\u80fd\u7ed3\u679c\u4e0d\u591f\u7cbe\u51c6\u3002\u56e0\u6b64\uff0c\u5982\u4f55\u6ee1\u8db3\u5b9e\u65f6\u6027\u8981\u6c42\uff0c\u4ee5\u53ca\u5bf9\u4e8e\u65b0\u52a0\u5165\u7684\u7269\u54c1\u6216\u8005\u7528\u6237\u8be5\u5982\u4f55\u63a8\u8350\uff0c\u90fd\u662f\u8981\u89e3\u51b3\u7684\u95ee\u9898\u3002<\/span><\/p>\n

              5\u3001\u7b97\u6cd5\u6548\u679c\u548c\u6027\u80fd\u7684\u6743\u8861\u3002\u4ece\u7b97\u6cd5\u89d2\u5ea6\u8ffd\u6c42\u591a\u6837\u6027\u548c\u51c6\u786e\u6027\uff0c\u4ece\u5de5\u7a0b\u89d2\u5ea6\u8ffd\u6c42\u6027\u80fd\uff0c\u8fd9\u4e24\u8005\u4e4b\u95f4\u5fc5\u987b\u627e\u5230\u4e00\u4e2a\u5e73\u8861\u70b9\u3002<\/span><\/p>\n

              6\u3001\u63a8\u8350\u7cfb\u7edf\u7684\u7a33\u5b9a\u6027\u548c\u6548\u679c\u8ffd\u8e2a\u3002\u9700\u8981\u6709\u4e00\u5957\u5b8c\u5584\u7684\u6570\u636e\u76d1\u63a7\u548c\u5e94\u7528\u76d1\u63a7\u4f53\u7cfb\uff0c\u540c\u65f6\u6709 ABTest \u5e73\u53f0\u8fdb\u884c\u7070\u5ea6\u5b9e\u9a8c\uff0c\u8fdb\u884c\u6548\u679c\u5bf9\u6bd4\u3002<\/span><\/p>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n

              \u5199\u5728\u6700\u540e<\/span><\/p>\n

              <\/section>\n

              \u8fd9\u7bc7\u6587\u7ae0\u662f\u63a8\u8350\u7cfb\u7edf\u7684\u5165\u95e8\u7bc7\uff0c\u76ee\u7684\u662f\u8ba9\u5927\u5bb6\u5bf9\u63a8\u8350\u7cfb\u7edf\u5148\u6709\u4e00\u4e2a\u6574\u4f53\u7684\u8ba4\u8bc6\uff0c\u540e\u7eed\u6211\u4f1a\u518d\u8fde\u8f7d\u51fa\u4e00\u4e9b\u6587\u7ae0\uff0c\u8be6\u7ec6\u5730\u4ecb\u7ecd\u9762\u5bf9\u5177\u4f53\u4e1a\u52a1\u548c\u7ebf\u4e0a\u6d77\u91cf\u6570\u636e\u65f6\uff0c\u63a8\u8350\u7cfb\u7edf\u5e94\u8be5\u5982\u4f55\u8bbe\u8ba1\uff1f<\/span><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

              \u505a\u5e7f\u544a\u4e1a\u52a11\u5e74\u591a\u65f6\u95f4\u4e86\uff0c\u4f46\u662f\u5e73\u65f6\u7684\u5de5\u4f5c\u4e3b\u8981\u548c\u5e7f\u544a\u5de5\u7a0b\u6709\u5173\uff0c\u6838\u5fc3\u7684\u5e7f\u544a\u7b97\u6cd5\u7531 AI \u90e8\u95e8\u652f\u6301\uff0c\u5bf9\u6211\u4eec\u800c\u8a00\u53ef\u4ee5\u8bf4\u662f … \u7ee7\u7eed\u9605\u8bfb\u201c23 \u5f20\u56fe\u89e3\uff0c\u5e26\u4f60\u5165\u95e8\u63a8\u8350\u7cfb\u7edf\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[895],"_links":{"self":[{"href":"http:\/\/www.zhushiyao.com\/index.php?rest_route=\/wp\/v2\/posts\/41167"}],"collection":[{"href":"http:\/\/www.zhushiyao.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.zhushiyao.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.zhushiyao.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.zhushiyao.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=41167"}],"version-history":[{"count":2,"href":"http:\/\/www.zhushiyao.com\/index.php?rest_route=\/wp\/v2\/posts\/41167\/revisions"}],"predecessor-version":[{"id":41196,"href":"http:\/\/www.zhushiyao.com\/index.php?rest_route=\/wp\/v2\/posts\/41167\/revisions\/41196"}],"wp:attachment":[{"href":"http:\/\/www.zhushiyao.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=41167"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.zhushiyao.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=41167"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.zhushiyao.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=41167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}