{"id":1515,"date":"2011-04-16T13:48:46","date_gmt":"2011-04-16T13:48:46","guid":{"rendered":"http:\/\/www.web2seo.cn\/?p=46"},"modified":"2011-04-16T13:48:46","modified_gmt":"2011-04-16T13:48:46","slug":"%e3%80%90%e8%bd%ac%e3%80%91%e4%bb%a5%e6%b1%82%e5%8c%bb%e4%b8%ba%e4%be%8b%e8%b0%88%e6%90%9c%e7%b4%a2%e5%bc%95%e6%93%8e%e6%8e%92%e5%ba%8f%e7%ae%97%e6%b3%95%e7%9a%84%e5%9f%ba%e7%a1%80%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/86i87.com\/?p=1515","title":{"rendered":"\u3010\u8f6c\u3011\u4ee5\u6c42\u533b\u4e3a\u4f8b\u8c08\u641c\u7d22\u5f15\u64ce\u6392\u5e8f\u7b97\u6cd5\u7684\u57fa\u7840\u539f\u7406"},"content":{"rendered":"<p>\u6ce8\uff1a\u539f\u6587\u94fe\u63a5\uff1a<a href=\"http:\/\/stblog.baidu-tech.com\/?p=121\">http:\/\/stblog.baidu-tech.com\/?p=121<\/a>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u5199\u5f97\u5f88\u597d\uff0c\u6df1\u5165\u6d45\u51fa\uff0c\u5176\u5b9e\u91cc\u9762\u6240\u8bf4\u7684<strong>P(d) \u66f4\u63a5\u8fd1\u4e8eTrust 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\u6469\u5929\u5927\u53a6\uff0c\u5982\u679c\u6ca1\u6709\u5efa\u7b51\u529b\u5b66\u3001\u6750\u6599\u529b\u5b66\u8fd9\u6837\u575a\u5b9e\u7684\u5b66\u79d1\u4f5c\u4e3a\u540e\u76fe\uff0c\u5219\u662f\u975e\u5e38\u975e\u5e38\u56f0\u96be\u7684\u3002\u540c\u7406\uff0c\u4f9d\u636e\u6734\u7d20\u7684\u7ecf\u9a8c\u6784\u5efa\u7684\u641c\u7d22\u5f15\u64ce\u7b97\u6cd5\uff0c\u7528\u6765\u5904\u7406\u4e0a\u4e07\u7684\u7f51\u9875\u96c6\u5408\u5e94\u8be5\u662f\u6ca1\u95ee\u9898\u7684\uff1b\u4f46\u8981\u68c0\u7d22\u4e0a\u4ebf\u7684\u7f51\u9875\uff0c\u5219\u9700\u8981\u66f4\u4e3a\u7262\u56fa\u7684\u7406\u8bba\u57fa\u7840\u3002<\/p>\n<p>\u6c42\u533b\uff0c\u75c5\u4eba\u4f1a\u4f18\u5148\u9009\u62e9\u8bca\u65ad\u51c6\u786e\u3001\u6cbb\u7597\u6548\u679c\u597d\u7684\u533b\u751f\uff1b\u5bf9\u4e8e\u641c\u7d22\u5f15\u64ce\u6765\u8bf4\uff0c\u4e00\u822c\u6309\u7f51\u9875\u6ee1\u8db3\u7528\u6237\u9700\u6c42\u7684\u6982\u7387\u4ece\u5927\u5230\u5c0f\u6392\u5e8f\u3002\u5982\u679c\u7528<strong>q<\/strong>\u8868\u793a\u7528\u6237\u7ed9\u51fa\u4e86\u4e00\u4e2a\u7279\u5b9a\u7684\u67e5\u8be2\uff0c\u7528<strong>d<\/strong>\u8868\u793a\u4e00\u4e2a\u7279\u5b9a\u7684\u7f51\u9875\u6ee1\u8db3\u4e86\u7528\u6237\u7684\u9700\u6c42\uff0c\u90a3\u4e48\u6392\u5e8f\u7684\u4f9d\u636e\u53ef\u4ee5\u7528\u4e00\u4e2a\u6761\u4ef6\u6982\u7387\u6765\u8868\u793a\uff1a<\/p>\n<p><strong>P(d|q)<\/strong><\/p>\n<p>\u8fd9\u4e2a\u7b80\u5355\u7684\u6761\u4ef6\u6982\u7387\uff0c\u5c06\u641c\u7d22\u5f15\u64ce\u6392\u5e8f\u7b97\u6cd5\u4e0e\u6982\u7387\u8bba\u8fd9\u95e8\u575a\u5b9e\u7684\u5b66\u79d1\u8054\u7cfb\u4e86\u8d77\u6765\uff0c\u8fd9\u5c31\u50cf\u5728\u5927\u6d77\u4e2d\u822a\u884c\u7684\u8239\u53ea\u88c5\u5907\u4e86\u6307\u5357\u9488\u4e00\u6837\u3002\u5229\u7528\u8d1d\u53f6\u65af\u516c\u5f0f\uff0c\u8fd9\u4e2a\u6761\u4ef6\u6982\u7387\u53ef\u4ee5\u8868\u793a\u4e3a\uff1a<\/p>\n<p><a href=\"http:\/\/stblog.baidu-tech.com\/wp-content\/uploads\/wp-display-data.php?filename=%E6%B1%82%E5%8C%BB_112961182151302588296.jpeg&amp;type=image%2Fjpeg&amp;width=195&amp;height=52\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-465\" title=\"\u6c42\u533b_11296118215\" src=\"http:\/\/stblog.baidu-tech.com\/wp-content\/uploads\/wp-display-data.php?filename=%E6%B1%82%E5%8C%BB_112961182151302588296.jpeg&amp;type=image%2Fjpeg&amp;width=195&amp;height=52\" alt=\"\" width=\"195\" height=\"52\" \/><\/a><\/p>\n<p>\u53ef\u4ee5\u6e05\u695a\u5730\u770b\u5230\uff0c\u641c\u7d22\u5f15\u64ce\u7684\u6392\u5e8f\u6807\u51c6\uff0c\u662f\u7531\u4e09\u4e2a\u90e8\u5206\u7ec4\u6210\u7684\uff1a\u67e5\u8be2\u672c\u8eab\u7684\u5c5e\u6027<strong>P(q)<\/strong>\uff1b\u7f51\u9875\u672c\u8eab\u7684\u5c5e\u6027<strong>P(d)<\/strong>\uff1b\u4e24\u8005\u7684\u5339\u914d\u5173\u7cfb<strong>P(q|d)<\/strong>\u3002\u5bf9\u4e8e\u540c\u4e00\u6b21\u67e5\u8be2\u6765\u8bf4\uff0c\u6240\u6709\u7f51\u9875\u5bf9\u5e94\u7684<strong>P(q)<\/strong>\u90fd\u662f\u4e00\u6837\u7684\uff0c\u56e0\u6b64\u6392\u5e8f\u65f6\u53ef\u4ee5\u4e0d\u8003\u8651\uff0c\u5373<\/p>\n<p><a href=\"http:\/\/stblog.baidu-tech.com\/wp-content\/uploads\/wp-display-data.php?filename=%E6%B1%82%E5%8C%BB_212961182461302588504.jpg&amp;type=image%2Fjpeg&amp;width=222&amp;height=38\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-468\" title=\"\u6c42\u533b_21296118246\" src=\"http:\/\/stblog.baidu-tech.com\/wp-content\/uploads\/wp-display-data.php?filename=%E6%B1%82%E5%8C%BB_212961182461302588504.jpg&amp;type=image%2Fjpeg&amp;width=222&amp;height=38\" alt=\"\" width=\"222\" height=\"38\" \/><\/a><\/p>\n<p>\u516c\u5f0f\u5de6\u8fb9\uff0c\u662f\u5df2\u77e5\u7528\u6237\u7684\u67e5\u8be2\uff0c\u6c42\u7f51\u9875\u6ee1\u8db3\u8be5\u7528\u6237\u9700\u6c42\u7684\u6982\u7387\u3002\u641c\u7d22\u5f15\u64ce\u4e3a\u4e86\u63d0\u9ad8\u54cd\u5e94\u7528\u6237\u67e5\u8be2\u7684\u6027\u80fd\uff0c\u9700\u8981\u4e8b\u5148\u5bf9\u6240\u6709\u5f85\u67e5\u8be2\u7684\u7f51\u9875\u505a\u9884\u5904\u7406\u3002\u9884\u5904\u7406\u65f6\uff0c\u53ea\u77e5\u9053\u7f51\u9875\uff0c\u4e0d\u77e5\u9053\u7528\u6237\u67e5\u8be2\uff0c\u56e0\u6b64\u9700\u8981\u5012\u8fc7\u6765\u8ba1\u7b97\uff0c\u5373\u5206\u6790\u6bcf\u4e2a\u7f51\u9875\u80fd\u6ee1\u8db3\u54ea\u4e9b\u9700\u6c42\uff0c\u8be5\u7f51\u9875\u5206\u4e86\u591a\u5927\u6bd4\u4f8b\u6765\u6ee1\u8db3\u8be5\u9700\u6c42\uff0c\u5373\u5f97\u5230\u516c\u5f0f\u53f3\u8fb9\u7684\u7b2c\u4e00\u9879<strong>P(q|d)<\/strong>\uff0c\u8fd9\u76f8\u5f53\u4e8e\u4e0a\u6587\u4ecb\u7ecd\u7684\u533b\u751f\u7684\u4e13\u95e8\u7a0b\u5ea6\u3002\u6bd4\u5982\uff0c\u4e00\u4e2a\u7f51\u9875\u4e13\u95e8\u4ecb\u7ecd\u7259\u75c5\uff0c\u53e6\u4e00\u4e2a\u7f51\u9875\u65e2\u4ecb\u7ecd\u7259\u75c5\u53c8\u4ecb\u7ecd\u80c3\u75c5\uff0c\u90a3\u4e48\u5bf9\u4e8e\u201c\u7259\u75bc\u201d\u8fd9\u4e2a\u67e5\u8be2\u6765\u8bf4\uff0c\u524d\u4e00\u4e2a\u7f51\u9875\u7684<strong>P(q|d)<\/strong>\u503c\u5c31\u4f1a\u66f4\u9ad8\u4e00\u4e9b\u3002<\/p>\n<p>\u516c\u5f0f\u53f3\u8fb9\u7684\u7b2c\u4e8c\u9879<strong>P(d)<\/strong>\uff0c\u662f\u4e00\u4e2a\u7f51\u9875\u6ee1\u8db3\u7528\u6237\u9700\u6c42\u7684\u6982\u7387\uff0c\u5b83\u53cd\u6620\u4e86\u7f51\u9875\u672c\u8eab\u7684\u597d\u574f\uff0c\u4e0e\u67e5\u8be2\u65e0\u5173\u3002\u5047\u5982\u8981\u5411\u4e00\u4e2a\u964c\u751f\u4eba\u63a8\u8350\u7f51\u9875\uff08\u6211\u4eec\u5e76\u4e0d\u77e5\u9053\u4ed6\u9700\u8981\u4ec0\u4e48\uff09\uff0c\u90a3\u4e48<strong>P(d)<\/strong>\u5c31\u76f8\u5f53\u4e8e\u67d0\u4e2a\u7279\u5b9a\u7684\u7f51\u9875\u88ab\u63a8\u8350\u7684\u6982\u7387\u3002\u5728\u4f20\u7edf\u7684\u4fe1\u606f\u68c0\u7d22\u6a21\u578b\u4e2d\uff0c\u8fd9\u4e00\u4e2a\u91cf\u4e0d\u592a\u88ab\u91cd\u89c6\uff0c\u5982\u4f20\u7edf\u7684\u5411\u91cf\u7a7a\u95f4\u6a21\u578b\u3001BM25\u6a21\u578b\uff0c\u90fd\u8bd5\u56fe\u53ea\u6839\u636e\u67e5\u8be2\u4e0e\u6587\u6863\u7684\u5339\u914d\u5173\u7cfb\u6765\u5f97\u5230\u6392\u5e8f\u7684\u6743\u91cd\u3002\u800c\u5b9e\u9645\u4e0a\uff0c\u8fd9\u4e2a\u4e0e\u67e5\u8be2\u65e0\u5173\u7684\u91cf\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u5047\u5982\u6211\u4eec\u7528\u7f51\u9875\u88ab\u8bbf\u95ee\u7684\u9891\u6b21\u6765\u4f30\u8ba1\u5b83\u6ee1\u8db3\u7528\u6237\u9700\u6c42\u7684\u6982\u7387\uff0c\u53ef\u4ee5\u770b\u51fa\u5bf9\u4e8e\u4e24\u4e2a\u4e0d\u540c\u7684\u7f51\u9875\uff0c\u8fd9\u4e2a\u91cf\u6709\u7740\u6781\u5176\u5de8\u5927\u7684\u5dee\u5f02\uff1a\u6709\u7684\u7f51\u9875\u6bcf\u5929\u53ea\u88ab\u8bbf\u95ee\u4e00\u4e24\u6b21\uff0c\u800c\u6709\u7684\u7f51\u9875\u6bcf\u5929\u88ab\u8bbf\u95ee\u6210\u5343\u4e0a\u4e07\u6b21\u3002\u80fd\u591f\u63d0\u4f9b\u5982\u6b64\u5de8\u5927\u5dee\u5f02\u7684\u91cf\uff0c\u7adf\u957f\u671f\u88ab\u4f20\u7edf\u7684\u641c\u7d22\u5f15\u64ce\u5ffd\u7565\uff0c\u76f4\u5230Google\u53d1\u660e\u4e86pagerank\u5e76\u8ba9\u5b83\u53c2\u4e0e\u5230\u6392\u5e8f\u4e2d\u3002Pagerank\u662f\u5bf9<strong>P(d)<\/strong>\u503c\u7684\u4e00\u4e2a\u4e0d\u9519\u7684\u4f30\u8ba1\uff0c\u8fd9\u4e2a\u56e0\u7d20\u7684\u52a0\u5165\u4f7f\u641c\u7d22\u5f15\u64ce\u7684\u6548\u679c\u7acb\u5373\u4e0a\u5347\u5230\u4e86\u4e00\u4e2a\u65b0\u7684\u53f0\u9636\u3002<\/p>\n<p>\u8fd9\u4e2a\u516c\u5f0f\u540c\u6837\u56de\u7b54\u4e86\u4e0a\u6587\u63d0\u51fa\u7684\u95ee\u9898\uff0c\u7f51\u9875\u4e0e\u67e5\u8be2\u7684\u5339\u914d\u7a0b\u5ea6\uff0c\u548c\u7f51\u9875\u672c\u8eab\u7684\u597d\u574f\uff0c\u8fd9\u4e24\u4e2a\u56e0\u7d20\u5e94\u8be5\u600e\u6837\u7ed3\u5408\u8d77\u6765\u53c2\u4e0e\u6392\u5e8f\u3002\u8fd9\u4e2a\u516c\u5f0f\u4ee5\u4e0d\u53ef\u8fa9\u9a73\u7684\u7406\u7531\u544a\u8bc9\u6211\u4eec\uff0c\u5982\u679c\u7f51\u9875\u4e0e\u67e5\u8be2\u7684\u5339\u914d\u7a0b\u5ea6\u7528<strong>P(q|d)<\/strong>\u6765\u8868\u793a\uff0c\u7f51\u9875\u672c\u8eab\u7684\u597d\u574f\u7528<strong>P(d)<\/strong>\u6765\u8868\u793a\uff0c\u90a3\u4e48\u5e94\u8be5\u6309\u5b83\u4eec\u7684\u4e58\u79ef\u6765\u8fdb\u884c\u6392\u5e8f\u3002\u5728\u73b0\u4ee3\u5546\u4e1a\u641c\u7d22\u5f15\u64ce\u4e2d\uff0c\u9700\u8981\u8003\u8651\u66f4\u591a\u66f4\u7ec6\u8282\u7684\u6392\u5e8f\u56e0\u7d20\uff0c\u8fd9\u4e9b\u56e0\u7d20\u53ef\u80fd\u6709\u6210\u767e\u4e0a\u5343\u4e2a\uff0c\u8981\u628a\u5b83\u4eec\u878d\u5408\u8d77\u6765\u662f\u66f4\u52a0\u590d\u6742\u548c\u56f0\u96be\u7684\u95ee\u9898\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6ce8\uff1a\u539f\u6587\u94fe\u63a5\uff1ahttp:\/\/stblog.baidu-tech.com\/?p=121\uff0c\u8fd9\u7bc7\u6587\u7ae0\u5199\u5f97\u5f88\u597d\uff0c\u6df1\u5165\u6d45\u51fa\uff0c\u5176\u5b9e\u91cc\u9762\u6240\u8bf4\u7684P(d) 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