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| "paper_id": "O04-1010", | |
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| "text": "\u220f = \u2212 m i i i r w w P 1 1 | \u70ba\u6700\u5927\uff0c\u4e5f\u5c31\u662f\u8aaa\uff1a ( ) ( ) \u220f = \u2212 \u2248 = m i i i r W r W w w P C W P W 1 1 | | max arg max arg ( ) 1 | \u2212 i i r w w P \u4ee3\u8868\u5728\u524d\u4e00\u500b\u5b57\u662f 1 \u2212 i w \u7684\u60c5\u6cc1\u4e0b\uff0c i w \u51fa\u73fe\u7684\u6a5f\u7387\u3002\u9019\u500b\u6578\u503c\u53ef\u4ee5\u8f49\u63db\u6210\u983b\u7387\uff0c\u4ee5 \u6700\u5927\u53ef\u80fd\u4f30\u8a08(maximum likelihood estimation, MLE)\u8a08\u7b97\u5982\u4e0b\uff1a ( ) ( ) ( ) ( ) ( ) 1 1 1 1 1 1 1 / / ) ( / ) ( | \u2212 \u2212 \u2212 \u2212 \u2212 \u2212 \u2212 = = \u2248 i i i i i i i r i i r i i r w Count w w Count N w Count N w w Count W P W W P w w P ( ) i i w w Count 1 \u2212 \u662f\u8a5e 1 \u2212 i w \u548c i w \u76f8\u9130\u51fa\u73fe\u7684\u6b21\u6578\uff0cCount(w i-1 )\u662f\u8a5e w i-1 \u51fa\u73fe\u7684\u983b\u7387\u3002\u63a1\u7528\u50b3\u7d71\u8a9e\u6599 \u5eab\u7b56\u7565\uff0c\u8a5e\u983b\u5f9e\u4e2d\u7814\u9662\u5e73\u8861\u8a9e\u6599\u5eab\u8a13\u7df4\u53d6\u5f97\u3002\u63a1\u7528\u5168\u7403\u8cc7\u8a0a\u7db2\u7b56\u7565\uff0c\u8a5e\u983b\u662f\u4ee5\u641c\u5c0b\u5f15\u64ce(\u5982\uff1aGoogle) \u6240\u50b3\u56de\u7684\u7db2\u9801\u6578\u4f86\u6a21\u64ec\u3002\u6aa2\u7d22\u6642\u67e5\u8a62\u95dc\u9375\u5b57(search term)\u524d\u5f8c\u6703\u52a0\u4e0a\u96d9\u5f15\u865f(\" \") \uff0c\u4ee3\u8868\u5fc5\u9808\u662f \"exactly match\"\u3002 \u7531\u65bc\u7d71\u8a08\u8cc7\u6599\u7684\u7a00\u758f\u6027(sparseness)\u554f\u984c\uff0c\u4e0d\u8ad6\u662f\u900f\u904e\u8a13\u7df4\u8a9e\u6599\u5eab\u3001\u6216\u662f\u5168\u7403\u8cc7\u8a0a\u7db2\uff0c\u6240\u5f97\u5230 \u7684 ( ) i i w w Count 1 \u2212 \u6578\u503c\uff0c\u6703\u51fa\u73fe\u67d0\u4e9b\u76f8\u9130\u8a5e\u7d44\u6c92\u6709\u5171\u540c\u51fa\u73fe\u904e\u7684\u60c5\u5f62\uff0c\u56e0\u800c\u767c\u751f\u300c\u96f6\u6a5f\u7387\u300d \uff0c\u5373 ( ) 0 | 1 = \u2212 i i r w w P \uff0c\u5728\u5be6\u9a57\u4e2d\u6211\u5011\u5c07\u5176\u6a5f\u7387\u503c\u8a2d\u5b9a\u70ba\u4e00\u500b\u6975\u5c0f\u7684\u6578\u503c( 12 10 \u2212 )\u3002 \u9664\u4e86", | |
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| "text": "\u3002 \u5728\u5168\u7403\u8cc7\u8a0a\u7db2\u65b9\u6cd5\uff0c\u9019\u5169\u500b\u6578\u503c\u7684\u5206\u5b50\u90e8\u5206\u76f8\u540c\uff0c\u90fd\u662f\u5b57\u4e32 ABC \u7684\u7db2\u9801\u6578\uff0c\u6240\u4ee5\u5206\u6bcd\u90e8\u5206\u6c7a\u5b9a \u4e86 \u9019 \u5169 \u500b \u6578 \u503c \u4e4b \u9593 \u7684 \u5927 \u5c0f \u95dc \u4fc2 \u3002 \u5982 \u679c A \u5c6c \u65bc \u9ad8 \u983b \u5b57 \uff0c \u5247 ) (A count \u6578 \u503c \u5f88 \u5927 \uff0c \u4f7f \u5f97 ) ( / ) ( A count ABC count < ) ( / ) ( AB count ABC count \uff0c\u5247\u65b7\u8a5e\u7cfb\u7d71\u6703\u9078\u64c7 AB/C \u4f5c\u70ba\u65b7\u8a5e\u7d50\u679c\uff0c\u53cd \u4e4b\u4ea6\u7136\u3002\u9019\u7a2e\u65b7\u8a5e\u6a21\u5f0f\u5f80\u5f80\u9020\u6210\u932f\u8aa4\u7684\u7d50\u679c\uff0c\u4f8b\u5982\uff1a\u5c07\u300c\u5f8c\u4f86/\u7684\u300d\u8aa4\u65b7\u6210\u300c\u5f8c/\u4f86\u7684\u300d \u3001\u5c07\u300c\u662f/ \u6545\u610f\u300d\u8aa4\u65b7\u6210\u300c\u662f\u6545/\u610f\u300d \u3002\u76f8\u5c0d\u65bc\u50b3\u7d71\u8a9e\u6599\u5eab\u65b9\u6cd5\uff0c\u56e0\u70ba\u7d71\u8a08\u503c\u7686\u4f86\u81ea\u65bc\u7d93\u904e\u65b7\u8a5e\u7684\u8a13\u7df4\u8a9e\u6599\u5eab\uff0c \u56e0\u6b64\u5206\u5b50\u90e8\u5206\u7684 ) (ABC count \u5728\u9019\u5169\u7a2e\u65b7\u8a5e\u7d44\u5408\u4e0b\uff0c\u5be6\u969b\u4e0a\u70ba count(A BC)\u548c count(AB C)\u6b64\u4e8c \u500b\u4e0d\u540c\u7684\u6578\u503c\uff0c\u6240\u4ee5\u9019\u7a2e\u932f\u8aa4\u60c5\u6cc1\u7684\u767c\u751f\u8f03\u5c11\u3002 \u7d71\u8a08\u503c\u4f86\u81ea Google \u7684\u5be6\u9a57\uff0c\u62c6\u958b\u985e\u578b\u7684\u932f\u8aa4\u6700\u591a\uff0c\u9019\u662f\u56e0\u70ba Google \u63a1\u7528\u67e5\u8fad\u5178\u65b9\u5f0f\u5efa\u7acb\u7d22 \u5f15 \uff0c \u6240 \u4ee5 \u767c \u751f \u300c substring \u7684 \u7db2 \u9801 \u6578 \u6bd4 superstring \u7684 \u7db2 \u9801 \u6578 \u4f86 \u5f97 \u5c11 \u300d \u9019 \u7a2e \u60c5 \u5f62 \uff0c \u9020 \u6210 ( ) ( ) ( ) 1 1 1 | \u2212 \u2212 \u2212 = i i i i i r w", | |
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| "text": "\u2212 = = = (\u5047\u8a2d 2 1 p p > ) \u5176\u4e2d\uff0c 1 c \u8868\u793a 1 w \u51fa\u73fe\u7684\u983b\u7387\uff0c 2 c \u8868\u793a 2 w \u51fa\u73fe\u7684\u983b\u7387\uff0c 12 c \u8868\u793a 1 w \u548c 2 w \u540c\u6642\u51fa\u73fe\u7684\u983b\u7387\uff0c N \u5247\u70ba\u8a9e\u6599\u5eab\u5167\u7684\u8fad\u5f59\u7e3d\u6578\u3002\u5047\u8a2d\u4e00\u4ee3\u8868 1 w \u548c 2 w \u662f\u7368\u7acb\u7684\uff0c\u5047\u8a2d\u4e8c\u5247\u4ee3\u8868 1 w \u548c 2 w \u6709\u95dc\u806f\u6027\u3002 \u5047\u8a2d\u6a5f\u7387\u5206\u5e03\u662f binomial distribution\uff0c\u8a08\u7b97\u53ef\u80fd\u6bd4\u4f8b(likelihood ratio) \u03bb \u7684 log \u503c\u3002\u800c \u03bb log 2 \u2212 \u7684\u6578 \u503c\u662f\u5448\u73fe 2 \u03c7 \u6a5f\u7387\u5206\u914d\uff0c\u7576\u81ea\u7531\u5ea6\u7b49\u65bc 1 \u6642\uff0c\u6211\u5011\u5c07\u4fe1\u8cf4\u6307\u6a19\u8a2d\u5b9a\u70ba 99%\uff0c\u5176\u81e8\u754c\u503c\u70ba 2.71\u3002\u5982 \u679c\u6211\u5011\u5c07\u6240\u6709\u53c3\u6578\u503c\u90fd\u4ee3\u5165\u516c\u5f0f\uff0c\u8a08\u7b97\u4e4b\u5f8c\u5f97\u5230 \u03bb log 2 \u2212 \u503c\u5927\u65bc 2.71\uff0c\u5247\u4ee3\u8868\"\u63a5\u53d7\u5047\u8a2d\u4e8c\uff02\uff0c\u610f \u5373\u662f 1 w \u548c 2 w \u662f\u6709\u95dc\u806f\u7684\u3002 \u5047\u8a2d\u7d71\u8a08\u503c\u4f86\u81ea\u6aa2\u7d22\u5168\u7403\u8cc7\u8a0a\u7db2\u56de\u50b3\u7684\u7db2\u9801\u6578\uff0c\u4ee4\u4e2d\u6587\u5b57\u4e32 k c c c w ... 2 1 = \u70ba\u7b49\u5f85\u6aa2\u9a57\u7684\u6307 \u5b9a\u5be6\u9ad4\u5019\u9078\u5b57\u4e32\uff0c\u70ba\u4e86\u589e\u52a0\u6aa2\u7d22\u5b57\u4e32\u7684\u9650\u5236\u6027\uff0c\u6211\u5011\u6240\u53d6\u7684\u5b50\u5b57\u4e32\u70ba\u539f\u4f86\u5b57\u4e32\u982d\u5c3e\u5404\u53bb\u9664\u4e00\u500b\u5b57 \u5143\uff0c\u4ea6\u5373 1 2 1 ... \u2212 = k", | |
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| "ref_entries": { | |
| "TABREF0": { | |
| "text": "Rosenfeld (2001)\u904b\u7528 Web \u6539\u5584 trigram model\uff0cComputational Linguistics \u671f\u520a(2003) \u4e5f\u767c\u884c\u5c08\u520a \u63a2\u8a0e\u9019\u500b\u8ab2\u984c\uff0cResnik \u548c Smith (2003) \u5c07 Web \u8996\u70ba\u5e73\u884c\u8a9e\u6599\u5eab\uff0c\u63d0\u4f9b\u7ffb\u8b6f\u6a21\u578b\u6240\u9700\u8981\u7684\u96d9\u8a9e \u53e5\u5b50\u3002Keller \u548c Lapata (2003) \u8aaa\u660e\u7531\u8a9e\u6599\u5eab\u548c Web \u4e0a\u6240\u64f7\u53d6\u7684\u82f1\u6587 bigram \u7d71\u8a08\u503c\u662f\u6709\u95dc\u806f \u6027\uff0c\u4f46\u986f\u800c\u6613\u898b\u9019\u9805\u7406\u8ad6\u5728\u4e2d\u6587\u4e0a\uff0c\u7531\u65bc\u65b7\u8a5e\u7684\u554f\u984c\uff0c\u4e0d\u898b\u5f97\u5c31\u6210\u7acb\u3002 \u4e2d\u6587\u65b7\u8a5e\u5728\u4e2d\u6587\u81ea\u7136\u8a9e\u8a00\u8655\u7406\u4e0a\u662f\u500b\u57fa\u672c\u7684\u5de5\u4f5c\uff0c\u8a31\u591a\u81ea\u7136\u8a9e\u8a00\u8655\u7406\u61c9\u7528\u90fd\u4ee5\u65b7\u8a5e\u4f5c\u70ba\u524d\u7f6e \u8655\u7406\uff0c\u4f8b\u5982\u6a5f\u5668\u7ffb\u8b6f\u3001\u554f\u7b54\u7cfb\u7d71\u3001\u81ea\u52d5\u6458\u8981\u7b49\u3002\u6b67\u7fa9\u6027\u662f\u4e2d\u6587\u65b7\u8a5e\u7cfb\u7d71\u7b2c\u4e00\u500b\u5fc5\u9808\u89e3\u6c7a\u7684\u554f\u984c\uff0c \u7531\u65bc\u4e2d\u6587\u5b57\u4e32\u53ef\u80fd\u6709\u591a\u7a2e\u4e0d\u540c\u7684\u65b7\u8a5e\u7d44\u5408\uff0c\u65b7\u8a5e\u7cfb\u7d71\u5fc5\u9808\u9078\u51fa\u5176\u4e2d\u6700\u597d\u7684\u4e00\u7a2e\u65b7\u8a5e\u65b9\u5f0f\u3002\u53e6\u5916\uff0c \u53d7\u9650\u65bc\u8fad\u5178\u8986\u84cb\u5ea6\u7684\u554f\u984c\uff0c\u672a\u77e5\u8a5e\u8655\u7406\u4e5f\u662f\u5fc5\u8981\u7684\u5de5\u4f5c\u3002\u800c\u6307\u5b9a\u5be6\u9ad4(named entities\uff0c\u7c21\u7a31 NE) \u662f\u5e38\u898b\u7684\u672a\u77e5\u8a5e\uff0c\u4e00\u822c\u65b7\u8a5e\u7cfb\u7d71\u90fd\u6703\u8f14\u4ee5\u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u6a21\u7d44\uff0c\u63d0\u51fa\u7b56\u7565\u81ea\u52d5\u8fa8\u8b58\u51fa\u4eba\u540d\u3001\u5730\u540d\u3001 \u548c\u7d44\u7e54\u540d\u7b49\u7684\u5b58\u5728(Chen, Ding \u548c Tsai, 1998; Chen, Yang \u548c Lin, 2003)\u3002\u672c\u6587\u4ee5\u4e2d\u6587\u65b7\u8a5e\u7cfb\u7d71\u70ba \u4f8b\uff0c\u4ee5\u7d71\u8a08\u5f0f\u8a9e\u8a00\u6a21\u578b\u4f5c\u70ba\u57fa\u790e\uff0c\u5c07 Web \u7d71\u8a08\u8cc7\u8a0a\u61c9\u7528\u5728\u4e2d\u6587\u65b7\u8a5e\u4e0a\u3002\u900f\u904e\u5c0d\u641c\u5c0b\u5f15\u64ce\u67e5\u8a62\uff0c \u6240\u50b3\u56de\u7684\u7db2\u9801\u6578(page count)\uff0c\u6a21\u64ec\u7d71\u8a08\u5f0f\u6a21\u578b\u6240\u7528\u5230\u7684\u8a5e\u983b\uff0c\u85c9\u6b64\u6bd4\u8f03\u4ee5\u50b3\u7d71\u8a9e\u6599\u5eab\u548c\u4ee5\u5168\u7403\u8cc7 \u8a0a\u7db2\u70ba\u57fa\u790e\u7684\u5dee\u7570\u3002 \u672c\u6587\u7b2c 2 \u7bc0\u9996\u5148\u8aaa\u660e\u4e2d\u6587\u65b7\u8a5e\u6240\u7528\u5230\u7684\u8a9e\u8a00\u6a21\u578b\uff0c\u4ee5\u53ca\u6240\u9700\u7684\u7d71\u8a08\u503c\uff0c\u50b3\u7d71\u8a9e\u6599\u5eab\u548c\u5168\u7403\u8cc7 \u8a0a\u7db2\u5982\u4f55\u63d0\u4f9b\uff0c\u5728\u9019\u88e1\u6211\u5011\u5047\u8a2d\u5b8c\u5168\u6c92\u6709\u672a\u77e5\u8a5e\u554f\u984c\u7684\u5b58\u5728\u3002\u7b2c 3 \u7bc0\u8a0e\u8ad6\u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\uff0c\u6211\u5011\u904b \u7528\u53ef\u80fd\u6bd4\u4f8b\u6e2c\u8a66(likelihood ratio test)\u65b9\u6cd5\uff0c\u5224\u65b7\u67d0\u4e00\u5b57\u4e32\u662f\u5426\u70ba\u6307\u5b9a\u5be6\u9ad4\u3002\u7b2c 4 \u7bc0\u5617\u8a66\u5c07\u65b7\u8a5e\u548c \u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u6574\u5408\uff0c\u4ee5\u5f70\u986f\u50b3\u7d71\u8a9e\u6599\u5eab\u548c\u5168\u7403\u8cc7\u8a0a\u7db2\u7684\u7279\u9ede\u3002\u7b2c 5 \u7bc0\u63d0\u51fa\u7d50\u8ad6\u8207\u672a\u4f86\u53ef\u80fd\u7684\u7814\u7a76\u3002", | |
| "content": "<table><tr><td>2. \u4e2d\u6587\u65b7\u8a5e \u4e2d\u6587\u65b7\u8a5e \u4e2d\u6587\u65b7\u8a5e \u4e2d\u6587\u65b7\u8a5e</td></tr><tr><td>2.1. \u5be6\u9a57\u6750\u6599 \u5be6\u9a57\u6750\u6599 \u5be6\u9a57\u6750\u6599 \u5be6\u9a57\u6750\u6599</td></tr><tr><td>\u4e2d\u6587\u65b7\u8a5e\u5be6\u9a57\u6240\u7528\u5230\u7684\u8fad\u5178\uff0c\u662f\u5f9e\u4e2d\u7814\u9662\u5e73\u8861\u8a9e\u6599\u5eab(ASBC, 1995)\u64f7\u53d6\u3002\u6211\u5011\u5c07\u8a9e\u6599\u5eab\u4e2d\u7684 \u8a5e\uff0c\u76f4\u63a5\u6536\u9304\u5728\u8fad\u5178\u5167\uff0c\u5171 145,929 \u500b\u8a5e\u3002\u6b64\u5916\uff0c\u6211\u5011\u5c07\u5e73\u8861\u8a9e\u6599\u5eab\u5207\u5206\u6210\u5169\u90e8\u5206\uff0c\u4f5c\u70ba\u8a13\u7df4\u8a9e \u6599\u5eab(5,386,820 \u500b\u8a5e)\u3001\u4ee5\u53ca\u6e2c\u8a66\u8a9e\u6599\u5eab(586,698 \u500b\u8a5e)\u3002\u524d\u8005\u7528\u4ee5\u8a13\u7df4\u5be6\u9a57\u7684\u8a9e\u8a00\u6a21\u578b\uff0c\u5f8c\u8005\u4f5c \u70ba\u5be6\u9a57\u6e2c\u8a66\u7684\u6a19\u6e96\u7b54\u6848\u3002 \u8a5e\u7db4\u70ba\u5177\u6709\u884d\u751f\u6027\u7684\u9644\u8457\u8a9e\u7d20\uff0c\u53ef\u6839\u64da\u69cb\u8a5e\u5f8b\u7d44\u5408\u6210\u8a5e\u3002\u524d\u7db4\u70ba\u300c\u9644\u52a0\u65bc\u5225\u7684\u6210\u5206\u4e4b\u524d\u69cb\u6210 \u8a5e\u300d \uff0c\u4f8b\u5982\uff1a\u5927\u5361\u8eca\u3001\u5927\u9a19\u5b50\u4e2d\u7684\u300c\u5927\u300d\u5c6c\u65bc\u524d\u8d05\u8a5e\u3002\u5f8c\u7db4\u70ba\u300c\u9644\u52a0\u65bc\u5225\u7684\u6210\u5206\u4e4b\u5f8c\u69cb\u6210\u8a5e\u300d \uff0c\u4f8b \u5982\uff1a\u72a7\u7272\u8005\u3001\u9020\u7269\u8005\u4e2d\u7684\u300c\u8005\u300d\u5c6c\u65bc\u5f8c\u8d05\u8a5e\u3002\u5728\u524d\u7db4/\u5f8c\u7db4\u8a5e\u8868\u4e2d\uff0c\u6211\u5011\u5171\u6536\u9304 1,135 \u500b\u524d\u7db4\u8a5e\uff0c \u4ee5\u53ca 1,419 \u500b\u5f8c\u7db4\u8a5e\u3002</td></tr><tr><td>2.2. \u6f14\u7b97\u6cd5 \u6f14\u7b97\u6cd5 \u6f14\u7b97\u6cd5 \u6f14\u7b97\u6cd5</td></tr><tr><td>1. \u7dd2\u8ad6 \u7dd2\u8ad6 \u7dd2\u8ad6 \u7dd2\u8ad6 \u8fad\u5178\u5f8c\u53ef\u80fd\u6703\u5f97\u5230\u4e00\u7a2e\u4ee5\u4e0a\u7684\u7d44\u5408\uff0c\u6b67\u7fa9\u6027\u5206\u6790\u5c31\u662f\u5f9e\u9019\u4e9b\u4e0d\u540c\u7684\u7d44\u5408\u4e2d\uff0c\u6311\u9078\u51fa\u6700\u53ef\u80fd\u7684\u8a5e\u4e32 c c c c ... 3 2 1 \uff0c\u67e5\u5b8c \u5728\u7d71\u8a08\u5f0f\u81ea\u7136\u8a9e\u8a00\u8655\u7406(statistical natural language processing)\uff0c\u8a9e\u8a00\u6a21\u578b\u7684\u8a2d\u8a08\u3001\u548c\u7d71\u8a08\u503c\u7684 \u4f86\u6e90\u662f\u5169\u500b\u5be6\u9a57\u6210\u529f\u4e0d\u53ef\u7f3a\u5c11\u7684\u8981\u4ef6\u3002\u56e0\u70ba\u8a9e\u8a00\u662f\"\u6d3b\u7684\"(live)\uff0c\u5728\u65e5\u5e38\u751f\u6d3b\u4e2d\u4e0d\u65b7\u6709\u65b0\u7684\u8fad\u5f59\u3001 \u8a00\u6a21\u578b\uff0c\u4e26\u8207\u50b3\u7d71\u8a9e\u6599\u5eab\u6bd4\u8f03\u3002\u8fd1\u5e74\u4f86\uff0c\u904b\u7528 Web \u65bc\u81ea\u7136\u8a9e\u8a00\u8655\u7406\uff0c\u6709\u4e9b\u76f8\u95dc\u8ad6\u6587\u767c\u8868\u3002Zhu \u548c Web \u8996\u70ba\u4e00\u500b\u8cc7\u6599\u91cf\u9f90\u5927\u3001\u4e14\u5177\u6642\u6548\u6027\u7684\u8a9e\u6599\u5eab\uff0c\u7814\u7a76\u5982\u4f55\u5229\u7528\u7db2\u8def\u4e0a\u7684\u8cc7\u8a0a\u4f86\u8a13\u7df4\u7d71\u8a08\u5f0f\u8a9e \u8a0a\uff0c\u5bb9\u6613\u53d7\u5230\u641c\u5c0b\u5f15\u64ce\u672c\u8eab\u8a2d\u8a08\u4e0a\u7684\u9650\u5236(\u4f8b\u5982\uff0c\u6587\u4ef6\u7d22\u5f15\u7684\u65b9\u5f0f\u3001\u67e5\u8a62\u8a5e\u5f59\u8655\u7406\u7b49)\u3002\u672c\u6587\u5c07 \u52d5\u614b\u6027\u7b49\u512a\u9ede\uff0c\u4f46\u7f3a\u9ede\u662f\u6c92\u6709\u52a0\u4e0a\u8a9e\u8a00\u6a19\u8a18\uff0c\u901a\u5e38\u9700\u8981\u900f\u904e\u641c\u5c0b\u5f15\u64ce(search engine)\u53d6\u5f97\u7d71\u8a08\u8cc7 \u5730\uff0c\u5168\u7403\u8cc7\u8a0a\u7db2(World Wide Web\uff0c\u7c21\u7a31 Web)\u64c1\u6709\u5341\u5206\u9f90\u5927\u7684\u8cc7\u8a0a\u91cf\u3001\u6536\u96c6\u5404\u7a2e\u4e0d\u540c\u7a2e\u985e\u7684\u6587\u4ef6\u3001 \u52a0\u4e0a\u6a19\u8a18(tagging)\uff0c\u589e\u52a0\u9644\u52a0\u50f9\u503c\uff0c\u540c\u6642\u53ef\u4ee5\u76f4\u63a5\u900f\u904e\u7a0b\u5f0f\uff0c\u7cbe\u78ba\u638c\u63e1\u6240\u9700\u8981\u7684\u7d71\u8a08\u8cc7\u8a0a\u3002\u76f8\u5c0d \u65bc\u50b3\u7d71\u8a9e\u6599\u5eab\u800c\u8a00\uff0c\u8cc7\u6599\u91cf\u898f\u6a21\u56fa\u5b9a\u3001\u5167\u5bb9\u9818\u57df\u8b8a\u52d5\u5c0f\u3001\u6642\u6548\u6027\u8f03\u5f31\u662f\u5176\u7f3a\u9ede\uff0c\u4f46\u512a\u9ede\u662f\u53ef\u4ee5\u5148 \u548c\u65b0\u7684\u7528\u6cd5\u7522\u751f\uff0c\u7cfb\u7d71\u5fc5\u9808\u80fd\u53ca\u6642\u53cd\u61c9\u65b0\u7684\u8a9e\u8a00\u73fe\u8c61\uff0c\u56e0\u6b64\u4f7f\u7528\u5177\u6709\u6642\u6548\u6027\u7684\u8cc7\u6e90\u975e\u5e38\u91cd\u8981\u3002\u5c0d m w w w W ... 2 1 = \uff0c\u4f7f\u5f97\u6a5f\u7387\u503c ( )</td></tr></table>", | |
| "html": null, | |
| "type_str": "table", | |
| "num": null | |
| }, | |
| "TABREF1": { | |
| "text": "word-based bigram model \u5916\uff0c\u6211\u5011\u4e5f\u540c\u6642\u898f\u5283 word-based tri-gram model \u7684\u5be6\u9a57\u3002\u6211\u5011 \u60f3\u77e5\u9053\u8a5e\u4e32\u7684\u6383\u63cf\u65b9\u5411\uff0c\u5c0d\u65bc\u6574\u500b\u5be6\u9a57\u7d50\u679c\u7684\u5f71\u97ff\uff0c\u6240\u4ee5\u9664\u4e86\u7531\u5de6\u5230\u53f3\u6383\u63cf\u5b57\u4e32\u5916\uff0c\u4e5f\u7531\u53f3\u800c\u5de6 \u6383\u63cf\u8a5e\u4e32\uff0c\u4f5c\u4e86 reverse bigram model \u7684\u5be6\u9a57\u3002 \u5f8c\u7db4\u7684\u8a5e\u5f59\uff0c\u5927\u90e8\u5206\u90fd\u88ab\u65b7\u6210\u55ae\u4e00\u8a5e\uff0c\u800c\u975e\u5169\u500b\u8a5e\uff0c\u6240\u4ee5\u589e\u52a0 prefix/suffix rule \u7684\u7b56\u7565\uff1a\u7d66\u4e88\u8a5e\u4e32 AB\uff0c\u67e5\u524d\u7db4/\u5f8c\u7db4\u8a5e\u8868\uff0c\u767c\u73fe A \u662f\u524d\u7db4(\u6216 B \u662f\u5f8c\u7db4)\uff0c\u4e14 AB", | |
| "content": "<table><tr><td colspan=\"9\">\u7814\u9662\u5e73\u8861\u8a9e\u6599\u5eab\uff0c\u9019\u7a2e\u5305\u542b\u524d\u7db4/\u6536\u9304\u65bc\u8fad\u5178\u4e2d\uff0c\u5247\u6211\u5011\u53ea\u5efa\u8b70\u300cAB\u300d\u9019\u55ae\u4e00\u8a5e\u70ba\u5019\u9078\u8005\u3002\u4f8b\u5982\u300c\u4f7f\u7528\u8005\u300d\u7684\u300c\u8005\u300d \uff0c\u67e5\u8868\u767c\u73fe\u5c6c \u8868 2. \u932f\u8aa4\u578b\u614b\u4e4b\u5206\u4f48 Dictionary Only Dictionary and Prefix/Suffix Rules \u65bc\u5f8c\u7db4\u8a5e\uff0c\u5247\u7cfb\u7d71\u5c31\u5c07\u4e4b\u65b7\u6210\u300c\u4f7f\u7528\u8005\u300d \uff0c\u800c\u4e0d\u6703\u6709\u62c6\u958b\u6210\u5169\u500b\u5b57\u7684\u60c5\u5f62\u767c\u751f\u3002 \u5408\u4f75 \u62c6\u958b \u6436\u5b57 \u5176\u5b83 \u5408\u4f75 \u62c6\u958b \u6436\u5b57 \u5176\u5b83 bi-corpus 12,136 3,805 1,244 402 14,931 942 835 84</td></tr><tr><td colspan=\"2\">2.3. \u7d50\u679c\u8207\u8a0e\u8ad6 \u7d50\u679c\u8207\u8a0e\u8ad6 \u7d50\u679c\u8207\u8a0e\u8ad6 bi-google 12,133 \u7d50\u679c\u8207\u8a0e\u8ad6 bi-openfind 14,828</td><td>6,811 3,936</td><td>2,496 3,915</td><td>508 718</td><td>14,894 14,967</td><td>2,225 1,702</td><td>2,518 3,896</td><td>518 743</td></tr><tr><td>bi-altavista</td><td>14,675</td><td>5,280</td><td>2,541</td><td>742</td><td>14,895</td><td>2,162</td><td>2,518</td><td>783</td></tr><tr><td colspan=\"2\">2.3.1. \u5be6\u9a57\u7d50\u679c \u5be6\u9a57\u7d50\u679c \u5be6\u9a57\u7d50\u679c rev-corpus 14,852 \u5be6\u9a57\u7d50\u679c rev-google 14,584</td><td>1,330 5,363</td><td>1,438 2,409</td><td>109 507</td><td>15,066 14,917</td><td>744 2,051</td><td>1,482 2,402</td><td>112 529</td></tr><tr><td colspan=\"9\">rev-opefind 14,834 \u5728\u7b2c\u4e00\u7d44\u5be6\u9a57\uff0c\u6709\u4e09\u7a2e\u8a9e\u8a00\u6a21\u578b\uff1abigram model\u3001reverse bigram model\u3001\u548c tri-gram model\uff1b 3,798 3,572 710 14,975 1,674 3,557 735 rev-altavista 14,669 5,138 2,378 723 14,896 2,117 2,357 747 \u5169\u7a2e\u7b56\u7565\uff1aDict-only \u7b56\u7565\u548c Dict+preffix/suffix rule \u7b56\u7565\uff1b\u5168\u7403\u8cc7\u8a0a\u7db2\uff1aGoogle\u3001Openfind\u3001\u548c tri-corpus 14,961 787 2,318 153 15,125 527 2,319 150 AltaVista\uff0c\u5171\u6709 11 \u500b\u5be6\u9a57\uff0c\u7d50\u679c\u5982\u8868 1 \u6240\u793a\u3002 tri-google 14,547 6,556 2,835 1,329 14,848 2,507 2,843 1,307 \u9996\u5148\u6211\u5011\u56fa\u5b9a\u8a9e\u8a00\u6a21\u578b\u70ba bi-gram model\uff0c\u4ee5\u53ca\u5b57\u4e32\u6383\u63cf\u65b9\u5411\u70ba\u7531\u5de6\u5230\u53f3\uff0c\u4ee5\u89c0\u5bdf\u50b3\u7d71\u8a9e\u6599 tri-altavista 14,578 6,125 3,230 1,447 14,848 2,326 3,239 1,447 \u5eab\u548c\u5168\u7403\u8cc7\u8a0a\u7db2\u4e4b\u5dee\u7570\uff0c\u4e0d\u7ba1\u5728 Dictionary only \u6216 Dictionary and prefix/suffix rule \u7b56\u7565\uff0cbi-corpus \u7684 F-measure \u90fd\u6700\u597d\uff0c\u5176\u6b21\u4f9d\u5e8f\u70ba bi-google\u3001bi-altavista\u3001\u548c bi-openfind\u3002\u7576\u5b57\u4e32\u6383\u63cf\u65b9\u5411\u6539\u70ba \u7531\u53f3\u5230\u5de6\uff0c\u9019\u56db\u7a2e\u65b9\u6cd5\u7684\u9806\u5e8f\u4e0d\u8b8a\uff0c\u7531\u53f3\u5230\u5de6\u7b56\u7565\u6bd4\u7531\u5de6\u5230\u53f3\u7684\u6548\u80fd\u597d\u3002\u6bd4\u8f03 bi-gram \u548c tri-gram models\uff0c\u4f7f\u7528\u50b3\u7d71\u8a9e\u6599\u5eab\u548c\u5168\u7403\u8cc7\u8a0a\u7db2\uff0cbi-gram model \u90fd\u6bd4 tri-gram model \u597d\u3002 \u8868 1. \u6b67\u7fa9\u6027\u5206\u6790\u7d50\u679c Dictionary Only Dictionary and Prefix/Suffix Rules precision recall F-measure precision recall F-measure bi-corpus 96.30% 95.39% 95.84% 97.09% 95.17% 96.12% bi-google 94.76% 94.42% 94.59% 95.83% 94.24% 95.03% bi-openfind 94.67% 93.42% 94.04% 95.39% 93.75% 94.56% bi-altavista 94.70% 93.71% 94.20% 95.70% 94.16% 94.92% rev-corpus 96.75% 95.08% 95.91% 97.00% 94.92% 95.95% \u7531\u8868 1 \u6240\u5217\u7684\u5be6\u9a57\u7d50\u679c\u53ef\u77e5\uff0c\u7121\u8ad6\u63a1\u7528\u4f55\u7a2e\u8a9e\u8a00\u6a21\u578b\uff0c\u6700\u5f8c\u7684\u8868\u73fe\u90fd\u662f\u50b3\u7d71\u8a9e\u6599\u5eab\u7684\u65b9\u6cd5\u6700 \u4f73\u3002\u9019\u662f\u56e0\u70ba\u50b3\u7d71\u8a9e\u6599\u5eab\u65b9\u6cd5\uff0c\u6240\u7528\u7684\u8a13\u7df4\u8a9e\u6599\u5eab\u662f\u65b7\u904e\u8a5e\u7684\u8a9e\u6599\uff0c\u5728\u8a13\u7df4\u968e\u6bb5\u638c\u63e1\u771f\u6b63\u7684\u8a5e\u983b\u3002 \u76f8\u5c0d\u5730\uff0c\u5168\u7403\u8cc7\u8a0a\u7db2\u7684\u7d71\u8a08\u503c\u5247\u662f\u7528\u641c\u5c0b\u5f15\u64ce\u50b3\u56de\u7684\u7db2\u9801\u6578\u4f86\u4f30\u7b97\uff0c\u800c\u7db2\u9801\u6578\u76f4\u89c0\u4e0a\u50c5\u4ee3\u8868\u300c\u6709 \u591a\u5c11\u500b\u7db2\u9801\u5305\u542b\u6b64\u7279\u5b9a\u7684\u8a5e\u300d \uff0c\u662f\u8cc7\u8a0a\u6aa2\u7d22\u4e2d\u6240\u7a31\u7684\u300c\u6587\u4ef6\u983b\u7387\u300d \uff0c\u4e26\u4e0d\u662f\u771f\u6b63\u7684\u8a5e\u983b\u3002\u6b64\u5916\uff0c\u5168 \u7403\u8cc7\u8a0a\u7db2\u7684\u7db2\u9801\uff0c\u6c92\u6709\u50cf\u50b3\u7d71\u8a9e\u6599\u5eab\u5df2\u7d93\u4eba\u5de5\u65b7\u8a5e\u6a19\u8a18\uff0c\u983b\u7387\u6703\u6709\u8aa4\u5dee\u3002\u4f8b\u5982\uff0c\u6211\u5011\u5c0d Google \u4e0b\u300c\u9580\u806f\u300d\u9019\u500b\u67e5\u8a62\uff0c\u6703\u767c\u73fe\u5305\u542b\u300c\u6fb3\u9580\u806f\u7db2\u300d\u9019\u500b\u5b57\u4e32\u7684\u7db2\u9801\uff0c\u4e5f\u88ab\u8a08\u7b97\u5728\u7db2\u9801\u6578\u4e2d\uff0c\u4f46\u4e8b\u5be6 \u4e0a\u300c\u6fb3\u9580\u806f\u7db2\u300d\u6b63\u78ba\u65b7\u8a5e\u70ba\u300c\u6fb3\u9580 \u806f\u7db2\u300d \uff0c\u6240\u4ee5\u4e0d\u80fd\u8a08\u7b97\u5728\u300c\u9580\u806f\u300d\u7684\u7db2\u9801\u6578\u5167\uff0c\u56e0\u6b64\u4ee5\u7db2\u9801 \u6578\u4f86\u66ff\u4ee3\u8a5e\u983b\u6703\u6709\u8aa4\u5dee\u3002 \u7531\u8868 2 \u53ef\u89c0\u5bdf\u5230\u50b3\u7d71\u8a9e\u6599\u5eab\u65b9\u6cd5\u767c\u751f\u6436\u5b57\u985e\u578b\u7684\u932f\u8aa4\u60c5\u6cc1\uff0c\u660e\u986f\u6bd4\u5168\u7403\u8cc7\u8a0a\u7db2\u65b9\u6cd5\u4f86\u5f97\u5c11\u3002 \u5b57\u4e32 ABC \u82e5\u53ef\u4ee5\u65b7\u6210 A/BC \u6216\u662f AB/C\uff0c\u5247\u6703\u6709\u76f8\u9130\u5169\u8a5e\u5f59\u4e92\u76f8\u6436\u5b57\u7684\u60c5\u6cc1\uff0c\u6839\u64da word-based bigram model\uff0c\u9019\u5169\u7a2e\u65b7\u8a5e\u7d44\u5408\u7684\u6a5f\u7387\u503c\u70ba ) ( / ) ( A count ABC count \uff0c\u53ca ) ( / ) ( AB count ABC count</td></tr><tr><td>rev-google</td><td colspan=\"2\">94.87%</td><td>93.86%</td><td>94.36%</td><td>95.92%</td><td/><td>94.30%</td><td>95.10%</td></tr><tr><td>rev-openfind</td><td colspan=\"2\">94.84%</td><td>93.56%</td><td>94.19%</td><td>95.52%</td><td/><td>93.87%</td><td>94.69%</td></tr><tr><td>rev-altavista</td><td colspan=\"2\">94.82%</td><td>93.80%</td><td>94.31%</td><td>95.80%</td><td/><td>94.23%</td><td>95.01%</td></tr><tr><td>tri-corpus</td><td colspan=\"2\">96.59%</td><td>94.64%</td><td>95.61%</td><td>96.66%</td><td/><td>94.63%</td><td>95.63%</td></tr><tr><td>tri-google</td><td colspan=\"2\">93.88%</td><td>93.24%</td><td>93.56%</td><td>95.20%</td><td/><td>93.83%</td><td>94.51%</td></tr><tr><td>tri-altavista</td><td colspan=\"2\">93.82%</td><td>93.13%</td><td>93.47%</td><td>95.04%</td><td/><td>93.67%</td><td>94.35%</td></tr><tr><td colspan=\"2\">2.3.2. \u5be6\u9a57\u8a0e\u8ad6 \u5be6\u9a57\u8a0e\u8ad6 \u5be6\u9a57\u8a0e\u8ad6 \u5be6\u9a57\u8a0e\u8ad6</td><td/><td/><td/><td/><td/><td/><td/></tr><tr><td colspan=\"9\">\u6211\u5011\u5c07\u65b7\u8a5e\u932f\u8aa4\u5206\u6210\u56db\u7a2e\u985e\u578b\u3002 1. \u5408\u4f75\uff1a\u8868\u793a\u5728\u6a19\u6e96\u7b54\u6848\u4e2d\u61c9\u8a72\u70ba\u5206\u958b\u7684\u5e7e\u500b\u8a5e\uff0c\u4f46\u7cfb\u7d71\u537b\u5c07\u9019\u4e9b\u5b57\u5408\u4f75\u70ba\u4e00\u500b\u8a5e\u5f59\u3002 \u4f8b\u5982\u6a19\u6e96\u7b54\u6848\u61c9\u70ba\u300c\u6709 \u4e00\u4e9b\u300d (\u4f8b: \u5916\u982d \u6709 \u4e00\u4e9b \u77ee \u623f\u5b50)\uff0c\u7cfb\u7d71\u7b54\u6848\u537b\u65b7 \u6210\u300c\u6709\u4e00\u4e9b\u300d \u3002 2. \u62c6\u958b\uff1a\u8868\u793a\u5728\u6a19\u6e96\u7b54\u6848\u4e2d\u61c9\u8a72\u70ba\u4e00\u500b\u8a5e\u5f59\uff0c\u4f46\u7cfb\u7d71\u537b\u5c07\u6b64\u8a5e\u5f59\u62c6\u958b\u6210\u6578\u500b\u8a5e\u3002\u4f8b\u5982 \u6a19\u6e96\u7b54\u6848\u61c9\u70ba\u300c\u5546\u5b78\u6240\u300d \uff0c\u7cfb\u7d71\u7b54\u6848\u537b\u65b7\u6210\u300c\u5546\u5b78 \u6240\u300d \u3002 3. \u6436\u5b57\uff1a\u8868\u793a\u5169\u500b\u76f8\u9130\u7684\u8fad\u5f59\uff0c\u5176\u4e2d\u4e00\u500b\u8a5e\u5f59\u7684\u90e8\u5206\u4e2d\u6587\u5b57\u5143\u88ab\u53e6\u4e00\u500b\u8a5e\u5f59\u6436\u8d70\u5f62\u6210 \u5b83\u7684\u4e00\u90e8\u5206\u3002\u4f8b\u5982\u6a19\u6e96\u7b54\u6848\u61c9\u70ba\u300c\u6cd5\u52d9 \u90e8\u9580\u300d \uff0c\u7cfb\u7d71\u7b54\u6848\u537b\u65b7\u6210\u300c\u6cd5\u52d9\u90e8 \u9580\u300d \u3002 4. \u5176\u4ed6\uff1a\u4e0d\u5c6c\u65bc\u4ee5\u4e0a\u4e09\u7a2e\u578b\u614b\u7684\u932f\u8aa4\uff0c\u901a\u901a\u6b78\u65bc\u5176\u4ed6\u3002\u4f8b\u5982\u6a19\u6e96\u7b54\u6848\u61c9\u662f\u300c\u53ca \u7b2c\u4e8c \u7d44\u300d \uff0c\u7cfb\u7d71\u7b54\u6848\u537b\u65b7\u6210\u300c\u53ca\u7b2c \u4e8c\u7d44\u300d \uff1b\u53e6\u5916\uff0c\u53c8\u5982\u6a19\u6e96\u7b54\u6848\u61c9\u662f\u300c\u539f \u88dd\u8a2d \u65bc\u300d \uff0c \u7cfb\u7d71\u7b54\u6848\u537b\u65b7\u6210\u300c\u539f\u88dd \u8a2d\u65bc\u300d \u3002</td></tr><tr><td colspan=\"9\">\u7528\u3001\u8005\u3001\u4f7f\u7528\u8005\u300d\u7b49\u8a5e\u5f59\uff0c\u6240\u4ee5\u6703\u7522\u751f\u300c\u4f7f\u7528 \u8005\u300d\u548c\u300c\u4f7f\u7528\u8005\u300d\u5169\u7a2e\u4e0d\u540c\u7684\u7d44\u5408\u3002\u6211\u5011\u89c0\u5bdf\u4e2d \u65b7\u8a5e\u7d44\u5408\uff0c\u5728\u89e3\u6b67\u7fa9\u6027\u968e\u6bb5\u6703\u9078\u64c7\u5176\u4e2d\u4e4b\u4e00\uff0c\u4f5c\u70ba\u65b7\u8a5e\u7d50\u679c\u3002\u4f8b\u5982\uff1a \u300c\u4f7f\u7528\u8005\u300d \uff0c\u56e0\u70ba\u8fad\u5178\u5305\u542b\u300c\u4f7f \u5c0d\u65bc\u67d0\u500b\u8a5e\u4e32 AB\uff0c\u82e5 A\u3001B\u3001AB \u7686\u6536\u9304\u5728\u8fad\u5178\u5167\uff0c\u5247\u6703\u6709\u300cA B\u300d\u548c\u300cAB\u300d\u5169\u7a2e\u4e0d\u540c\u7684 \u6839\u64da\u9019\u56db\u7a2e\u932f\u8aa4\u578b\u614b\u5206\u985e\uff0c\u6211\u5011\u8a08\u7b97\u4e0d\u540c\u6a21\u578b\u7684\u932f\u8aa4\u500b\u6578\uff0c\u5982\u8868 2 \u6240\u5217\u3002</td></tr></table>", | |
| "html": null, | |
| "type_str": "table", | |
| "num": null | |
| }, | |
| "TABREF3": { | |
| "text": "\u7bc0\u7684\u5be6\u9a57\u7d50\u679c\u4e00\u81f4\uff0c\u50b3\u7d71\u8a9e\u6599\u5eab\u65b9\u6cd5\u7684\u6548\u80fd 92.38%\uff0c\u4ecd\u7136\u6bd4\u5168\u7403\u8cc7\u8a0a\u7db2\u65b9\u6cd5 91.21% \u548c 90.31%\u597d\u3002\u7576\u8003\u616e\u6307\u5b9a\u5be6\u9ad4\uff0c\u6574\u5408\u9032 Google \u548c AltaVista \u70ba\u57fa\u790e\u7684\u65b7\u8a5e\u4e2d\uff0c\u6548\u80fd\u5206\u5225\u589e\u52a0 2.36%\u548c 2.11%\uff0c\u9996\u5148\u8d85\u8d8a\u7d14\u50b3\u7d71\u8a9e\u6599\u5eab\u7684\u65b9\u6cd5 1.19% \u548c 0.04%\u3002\u518d\u8003\u91cf\u50b3\u7d71\u8a9e\u6599\u5eab\u7d71\u8a08\u503c\uff0c\u89e3\u6c7a\u65b7\u8a5e\u6b67\u7fa9\u6027\u7684\u6548\u80fd\uff0c\u6bd4\u5168\u7403\u8cc7\u8a0a\u7db2\u7d71\u8a08\u503c\u4f73\u7684\u73fe\u8c61\uff0c\u6211 \u5011\u5148\u4ee5\u5168\u7403\u8cc7\u8a0a\u7db2\u5075\u6e2c\u672a\u77e5\u8a5e\u7684\u5b58\u5728\uff0c\u518d\u4ee5\u50b3\u7d71\u8a9e\u6599\u5eab\u7d71\u8a08\u503c\u4f86\u89e3\u6b67\u7fa9\u6027\uff0c\u5f97\u5230\u7684\u7d50\u679c\u70ba\u6700\u4f73 94.66%\u3002 \u8868 8. \u589e\u52a0\u672a\u77e5\u8a5e\u5075\u6e2c\u7684\u65b7\u8a5e\u7d50\u679c Hsin-Hsi Chen, Yung-Wei Ding and Shih-Chung Tsai (1998). \"Named Entity Extraction for Information Retrieval.\" Computer Processing of Oriental Languages, Special Issue on Information Retrieval on Oriental Languages 12(1), 1998, 75-85.", | |
| "content": "<table><tr><td>left w ) ( w \u53c3\u6578\u503c\uff0c\u5957\u9032\u4e0a\u8ff0\u516c\u5f0f\u8a08\u7b97 c c c \uff0c\u548c 12 pc c = \u3001N=\u641c\u5c0b\u5f15\u64ce\u6240\u6536\u9304\u7db2\u9801\u7e3d\u6578\uff0c\u5176\u4e2d k right c c c w ... 3 2 = \uff0c\u5247\u53c3\u6578 (word 1 c = ) pc \u4ee3\u8868 word \u7684\u7db2\u9801\u6578\u3002\u6709\u4e86\u9019\u4e9b ) ( left w pc \u3001 ) ( 2 right w pc c = \u3001 \u03bb log 2 \u2212 \u7684\u503c\u3002\u5982\u679c\u5927\u65bc 2.71\uff0c\u5247\u4ee3\u8868\u901a\u904e\u516c\u5f0f\u6aa2\u9a57\uff0c\u6211\u5011\u8a8d\u5b9a\u5b57 \u4e32 w \u70ba\u4e00\u6307\u5b9a\u5be6\u9ad4\u3002\u5982\u679c\u5c0f\u65bc 2.71\uff0c\u5247\u8868\u793a\u975e\u6307\u5b9a\u5be6\u9ad4\u3002\u8209\u4f8b\u4f86\u8aaa\uff0c\u4ee4 w \u70ba\u300c\u827e\u7279\u7d0d\u4fdd\u96aa\u516c\u53f8\u300d \uff0c \u5247 left w \u70ba\u300c\u827e\u7279\u7d0d\u4fdd\u96aa\u516c\u300d \uff0c right w \u70ba\u300c\u7279\u7d0d\u4fdd\u96aa\u516c\u53f8\u300d \u3002\u6211\u5011\u85c9\u7531\u641c\u5c0b\u5f15\u64ce\u5f97\u5230\u6b64\u4e09\u500b\u5b57\u4e32\u7684\u7db2 \u9801\u6578\uff0c\u4e26\u8a08\u7b97 \u03bb log 2 \u2212 \u503c\u3002 \u57fa\u672c\u6f14\u7b97\u6cd5\u5982\u5f8c\uff1a\u5148\u904b\u7528\u8fad\u5178\u628a\u53e5\u5b50\u5207\u5206\u51fa\u5404\u7a2e\u53ef\u80fd\u7684\u8a5e\u7d44\u5408\uff0c\u7136\u5f8c\u6383\u63cf\u8a5e\u4e32\u3002\u82e5\u662f\u6383\u63cf\u5230 \u7684\u67d0\u500b\u8a5e\uff0c\u5c6c\u65bc\u6307\u5b9a\u5be6\u9ad4\u7684\u95dc\u9375\u5b57\uff0c\u5247\u8868\u793a\u6b64\u8a5e\u4e32\u806f\u5176\u524d/\u5f8c\u76f8\u9130\u7684\u5e7e\u500b\u8a5e\u53ef\u80fd\u7d44\u6210\u4e00\u500b\u6307\u5b9a\u5be6 \u9ad4\uff0c\u56e0\u6b64\u9a45\u52d5\u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u7684\u6aa2\u9a57\u3002\u5982\u679c\u5c6c\u65bc\u4e2d\u6587\u4eba\u540d\u59d3\u6c0f\uff0c\u5247\u6211\u5011\u5f80\u5f8c\u6aa2\u67e5\u6700\u591a\u5169\u500b\u5b57\uff0c\u8a08\u7b97 \u5b57\u4e32 2 1 + + i i i w w w \u662f\u5426\u901a\u904e\u516c\u5f0f\u6aa2\u9a57\u3002\u82e5\u662f\u67d0\u500b\u8a5e i w \u5c6c\u65bc\u5730\u540d\u3001\u6216\u662f\u7d44\u7e54\u540d\u7684\u95dc\u9375\u8a5e\uff0c\u5247\u6211\u5011\u6700 \u591a\u5f80\u524d\u6aa2\u67e5\u4e94\u500b\u8a5e\uff0c\u8a08\u7b97\u6b64\u4e32\u806f\u5b57\u4e32\u662f\u5426\u901a\u904e\u516c\u5f0f\u6aa2\u9a57\u3002\u6211\u5011\u5c0d\u65bc\u901a\u904e\u516c\u5f0f\u6aa2\u9a57\u7684\u5b57\u4e32\uff0c\u518d\u6839\u64da \u95dc\u9375\u8a5e\u7684\u985e\u5225\uff0c\u7d66\u4e88\u4e0d\u540c\u7684\u8a9e\u610f\u6a19\u8a18\u3002 \u4f8b\u5982\uff0c\u5b57\u4e32\u300c\u9152\u6cc9\u885b\u661f\u767c\u5c04\u4e2d\u5fc3\u300d \uff0c\u7d93\u904e\u67e5\u8fad\u5178\u4e4b\u5f8c\uff0c\u5f97\u5230\u300c\u9152 \u6cc9 \u885b\u661f \u767c\u5c04 \u4e2d\u5fc3\u300d \u3002\u6383\u63cf \u8a5e\u4e32\u767c\u73fe\u300c\u4e2d\u5fc3\u300d\u662f\u5730\u540d\u7684\u95dc\u9375\u8a5e\uff0c\u6211\u5011\u4e32\u806f\u524d\u9762\u4e94\u500b\u8a5e(\u5373\u300c\u9152\u6cc9\u885b\u661f\u767c\u5c04\u4e2d\u5fc3\u300d) \uff0c\u5c07\u6b64\u5b57 \u4e32\u7684\u5404\u500b\u76f8\u95dc\u53c3\u6578\u503c\uff0c\u5373 w \u300c\u9152\u6cc9\u885b\u661f\u767c\u5c04\u4e2d\u5fc3\u300d \u3001 left w \u300c\u9152\u6cc9\u885b\u661f\u767c\u5c04\u4e2d\u300d \u3001\u8207 right w \u300c\u6cc9\u885b\u661f \u767c\u5c04\u4e2d\u5fc3\u300d \uff0c\u5728\u641c\u5c0b\u5f15\u64ce\u6240\u5f97\u5230\u7684\u7db2\u9801\u6578\u5957\u9032\u516c\u5f0f\u6aa2\u9a57\u3002 \u5c0d\u65bc\u5916\u570b\u4eba\u540d\u90e8\u5206\uff0c\u662f\u4ee5\u9023\u7e8c\u51fa\u73fe n \u500b\u4ee5\u4e0a\u7684\u55ae\u5b57\u8a5e\uff0c\u6240\u4e32\u806f\u7684\u5b57\u4e32\u4f86\u505a\u5224\u65b7\u3002\u5982\u679c\u6b64\u9023\u7e8c \u55ae\u5b57\u8a5e\u6240\u7d44\u6210\u7684\u5b57\u4e32\uff0c\u80fd\u5920\u901a\u904e\u516c\u5f0f\u6aa2\u9a57\uff0c\u6211\u5011\u5c31\u8996\u4e4b\u70ba\u5916\u570b\u4eba\u540d\uff0c\u5c07\u5b57\u4e32\u52a0\u4e0a\u4eba\u540d\u7684\u6a19\u793a\u3002 3.2.2. \u4fee\u6539\u6f14\u7b97\u6cd5 \u4fee\u6539\u6f14\u7b97\u6cd5 \u4fee\u6539\u6f14\u7b97\u6cd5 \u4fee\u6539\u6f14\u7b97\u6cd5 \u6839\u64da\u539f\u4f86\u516c\u5f0f\u7684\u5b9a\u7fa9\uff0c\u7576 ) (w pc \u3001 ) ( left w pc \u3001\u548c ) ( right w pc \u6709\u4e00\u503c\u70ba\u96f6\u6642\uff0c\u5247\u5c31\u4e0d\u6703\u901a\u904e \u6aa2\u9a57\u3002\u4f46\u662f\u6211\u5011\u767c\u73fe\u53ef\u80fd\u6709\u7a2e\u60c5\u6cc1\uff1a\u6aa2\u7d22\u67d0\u5b57\u4e32 w \uff0c\u56de\u50b3\u7684\u7db2\u9801\u6578\u5927\u65bc\u96f6( 0 ) ( > w pc )\uff0c\u4f46\u662f\u5176 \u5b50\u5b57\u4e32\u7684\u7db2\u9801\u6578 ) ( left w pc \u3001\u6216 ) ( right w pc \u537b\u7b49\u65bc\u96f6\u3002\u5982\u679c\u4f9d\u7167\u539f\u59cb\u516c\u5f0f\uff0c\u9019\u7a2e\u60c5\u5f62\u7684\u5b57\u4e32\u5c31\u6703\u88ab \u907a\u6f0f\uff0c\u6240\u4ee5\u5c07\u539f\u4f86\u6aa2\u9a57\u904e\u7a0b\uff0c\u505a\u4e86\u9ede\u5c0f\u5c0f\u7684\u4fee\u6539\uff1a\u7576 0 ) ( > w pc \u6642\uff0c\u82e5\u662f ) ( left w pc \u3001\u6216 ) ( right w pc \u7684\u503c\u7b49\u65bc\u96f6\u6642\uff0c\u5247\u76f4\u63a5\u901a\u904e\u6aa2\u9a57\uff0c\u4e0d\u9700\u8981\u8a08\u7b97 \u03bb log 2 \u2212 \u7684\u6578\u503c\u3002 3.3. \u5be6\u9a57\u8207\u7d50\u679c \u5be6\u9a57\u8207\u7d50\u679c \u5be6\u9a57\u8207\u7d50\u679c \u5be6\u9a57\u8207\u7d50\u679c 3.3.1. \u5be6\u9a57\u4e00\uff1a\u5b57\u5178\u8207\u7b54\u6848\u70ba\u4e92\u65a5 \u5be6\u9a57\u4e00\uff1a\u5b57\u5178\u8207\u7b54\u6848\u70ba\u4e92\u65a5 \u5be6\u9a57\u4e00\uff1a\u5b57\u5178\u8207\u7b54\u6848\u70ba\u4e92\u65a5 \u5be6\u9a57\u4e00\uff1a\u5b57\u5178\u8207\u7b54\u6848\u70ba\u4e92\u65a5 \u8868 3 \u5217\u51fa\u7b2c\u4e00\u7d44\u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u5be6\u9a57\u7684\u7d50\u679c\uff0c\u7cfb\u7d71\u6548\u80fd\u4ee5 F-measure \u8868\u793a\uff0caltavista_1 \u548c google_1 \u662f\u4ee5\u539f\u59cb\u672a\u4fee\u6539\u7684\u516c\u5f0f\u6aa2\u9a57\uff0caltavista_2 \u548c google_2 \u662f\u4ee5\u4fee\u6539\u5f8c\u7684\u516c\u5f0f\u6aa2\u9a57\u3002\u672c\u5be6\u9a57\u6240\u7528\u7684\u8fad\u5178\uff0c \u8207 MET-2 \u6e2c\u8a66\u8a9e\u6599\u4e2d\u7684\u6307\u5b9a\u5be6\u9ad4\u96c6\u70ba\u4e92\u65a5\u95dc\u4fc2\uff0c\u8868\u793a\u6e2c\u8a66\u8a9e\u6599\u4e2d\u7684\u6bcf\u500b\u7b54\u6848\uff0c\u90fd\u4e0d\u6703\u6536\u9304\u65bc\u8fad \u5178\u5167\u3002\u7531\u65bc\u4e00\u4e9b\u6307\u5b9a\u5be6\u9ad4 w \u7684\u7db2\u9801\u6578\u5927\u65bc\u96f6\uff0c\u4f46 left w \u6216 right w \u537b\u7b49\u65bc\u96f6\uff0c\u56e0\u6b64\u7121\u6cd5\u88ab\u8fa8\u8b58\u51fa\u3002\u5be6 \u9a57\u9a57\u8b49 altavista_2 \u548c google_2 \u7684\u6548\u80fd\uff0c\u90fd\u6bd4\u5c0d\u61c9\u7684 altavista_1 \u548c google_1 \u9ad8\u3002\u53e6\u5916\uff0c\u4e00\u4e9b\u505c\u7528 \u5b57\u51fa\u73fe\u983b\u7387\u592a\u9ad8\uff0c\u56e0\u800c\u5c0e\u81f4\u7cfb\u7d71\u8fa8\u8b58\u51fa\u7684\u6307\u5b9a\u5be6\u9ad4\u908a\u754c\u932f\u8aa4\uff0c\u4f8b\u5982\uff1a \u300c\u5728\u592a\u539f\u885b\u661f\u767c\u5c04\u4e2d\u5fc3\u300d \uff0c\"\u5728\" \u662f\u591a\u9918\u7684\u3002\u56e0\u6b64\uff0c\u7576\u6211\u5011\u6383\u63cf\u8a5e\u4e32\u6642\uff0c\u78b0\u5230\u505c\u7528\u5b57\u5c31\u505c\u6b62\u3002altavista_3 \u548c google_3 \u662f\u4ee5\u4fee\u6539\u5f8c\u7684 \u516c\u5f0f\uff0c\u52a0\u4e0a\u5224\u65b7\u662f\u5426\u5305\u542b\u505c\u7528\u5b57\u7684\u7d50\u679c\u3002\u4fee\u6b63\u5f8c\u7684\u516c\u5f0f\uff0c\u52a0\u4e0a\u505c\u7528\u5b57\u7684\u5224\u65b7\uff0c\u6709\u52a9\u65bc\u63d0\u5347\u6307\u5b9a\u5be6 \u9ad4\u7684\u8fa8\u8b58\uff0c\u6240\u4ee5\u4e4b\u5f8c\u7684\u5be6\u9a57\u4ee5 altavista_3 \u548c google_3 \u70ba\u57fa\u790e\u3002\u672c\u65b9\u6cd5\u53ef\u4ee5\u627e\u51fa\uff0c\u5982\u300c\u674e\u5875\u98a8\u300d \u3001 \u300c\u897f\u660c\u885b\u661f\u767c\u5c04\u4e2d\u5fc3\u300d \u3001\u548c\u300c\u570b\u969b\u885b\u661f\u901a\u4fe1\u7d44\u7e54\u300d\u7b49\u6307\u5b9a\u5be6\u9ad4\u3002 \u8868 3. \u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u5be6\u9a57\u4e00\u4e4b\u7d50\u679c PER LOC ORG Total altavista_1 34.60% 12.98% 51.41% 32.12% altavista_2 34.60% 12.54% 52.81% 32.50% altavista_3 43.80% 16.95% 62.58% 39.44% google_1 47.03% 10.22% 21.37% 22.06% google_2 48.70% 10.02% 40.42% 29.18% google_3 55.84% 16.72% 54.65% 37.84% 3.3.2. \u5be6\u9a57\u4e8c \u5be6\u9a57\u4e8c \u5be6\u9a57\u4e8c \u5be6\u9a57\u4e8c\uff1a \uff1a \uff1a \uff1a\u8fad\u5178\u5167\u589e\u52a0\u6536\u9304\u570b\u540d\u548c\u7701\u540d \u8fad\u5178\u5167\u589e\u52a0\u6536\u9304\u570b\u540d\u548c\u7701\u540d \u8fad\u5178\u5167\u589e\u52a0\u6536\u9304\u570b\u540d\u548c\u7701\u540d \u8fad\u5178\u5167\u589e\u52a0\u6536\u9304\u570b\u540d\u548c\u7701\u540d \u5be6\u9a57\u4e00\u5730\u540d\u8fa8\u8b58\u4e0d\u597d\u7684\u4e3b\u8981\u539f\u56e0\u4e4b\u4e00\uff0c\u662f\u8a31\u591a\u5730\u540d\u4e26\u6c92\u6709\u5305\u542b\u5e38\u898b\u7684\u95dc\u9375\u5b57\uff0c\u4f8b\u5982\u570b\u540d\uff1a\u5370 \u5ea6\u3001\u5df4\u897f\u7b49\u7b49\uff0c\u6240\u4ee5\u6c92\u8fa6\u6cd5\u6839\u64da\u95dc\u9375\u5b57\u4f86\u9a45\u52d5\u9019\u4e9b\u5730\u540d\u7684\u8fa8\u8b58\u3002\u4fee\u6539\u7684\u65b9\u5f0f\u662f\uff1a\u5728\u8fad\u5178\u5167\u589e\u52a0\u6536 \u9304\u4e16\u754c\u5404\u570b\u7684\u570b\u540d\uff0c\u4ee5\u53ca\u5927\u9678\u5404\u7701\u7684\u7701\u540d\uff0c\u9019\u90e8\u5206\u5728\u5730\u540d\u4f86\u8aaa\u662f\u6bd4\u8f03\u5c6c\u65bc closed set\u3002\u6709\u4e86\u9019\u65b9 \u9762\u7684\u8cc7\u8a0a\u4e4b\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u5c0d\u6587\u4ef6\u4e2d\u7684\u570b\u540d\u8207\u7701\u540d\u4f5c\u6a19\u8a18\uff0c\u4ee5\u589e\u52a0\u5730\u540d\u7684\u8fa8\u8b58\u6548\u80fd\u3002\u6587\u4ef6\u4e2d\u4e5f\u5e38\u5e38 \u51fa\u73fe\u5730\u540d\u7e2e\u5beb\uff0c\u4f8b\u5982\uff1a\u82f1\u3001\u6cd5\u3001\u5fb7\u7b49\u7b49\uff0c\u6211\u5011\u5728\u8fad\u5178\u5167\u589e\u52a0\u6536\u9304\u4e00\u4e9b\u570b\u540d\u7e2e\u5beb\uff0c\u56e0\u6b64\u90e8\u5206\u570b\u540d\u7e2e \u5beb\u53ef\u4ee5\u88ab\u8fa8\u8b58\u51fa\u4f86\uff0c\u4f46\u50cf\u662f\u300c\u4e2d\u300d\u6216\u300c\u4ee5\u300d\u9019\u985e\u570b\u540d\u7e2e\u5beb\uff0c\u672c\u8eab\u5c6c\u65bc\u5e38\u5e38\u51fa\u73fe\u7684\u505c\u7528\u5b57\uff0c\u5247\u6c92\u88ab \u6536\u9304\u5728\u8fad\u5178\u5167\u3002 \u8868 4 \u4e2d\u7684 altavista_4 \u548c google_4 \u8868\u793a\u4ee5\u4fee\u6539\u5f8c\u7684\u516c\u5f0f\uff0c\u548c\u589e\u52a0\u6536\u9304\u5730\u540d\u7684\u8fad\u5178\u6240\u5be6\u9a57\u7684\u7d50 \u679c\uff0caltavista_5 \u548c google_5 \u8868\u793a\u589e\u52a0\u570b\u540d\u7e2e\u5beb\u7684\u6a19\u8a18\uff0caltavista_5_n \u548c google_5_n \u8868\u793a\uff1a\u6211\u5011\u6aa2 \u67e5\u9023\u7e8c\u51fa\u73fe n \u500b\u4ee5\u4e0a\u7684\u55ae\u5b57\u8a5e\u662f\u5426\u901a\u904e\u6aa2\u9a57\uff0c\u901a\u904e\u8996\u4e4b\u70ba\u5916\u570b\u4eba\u540d\uff0c\u85c9\u6b64\u89c0\u5bdf\u5c0d\u4eba\u540d\u8fa8\u8b58\u7684\u5f71 \u97ff\u3002\u8868 4 \u986f\u793a\u589e\u52a0\u6536\u9304\u570b\u540d\u548c\u7701\u540d\uff0c\u4ee5\u53ca\u6a19\u8a18\u90e8\u5206\u570b\u540d\u7e2e\u5beb\u5f8c\uff0c\u80fd\u63d0\u9ad8\u8fa8\u8b58\u6548\u80fd\u3002\u589e\u52a0\u5916\u570b\u4eba\u540d \u7684\u5224\u65b7\uff0c\u5728\u9023\u7e8c 5 \u500b\u55ae\u5b57\u8a5e\u5224\u65b7\u6642\u5206\u6578\u70ba\u6700\u9ad8\u3002AltaVista \u5728\u7d44\u7e54\u540d\u8fa8\u8b58\u6548\u80fd\u8f03 Google \u4f73\uff0c\u800c Google \u8fa8\u8b58\u4eba\u540d\u548c\u5730\u540d\u7684\u6548\u80fd\u5247\u8f03 AltaVista \u4f73\u3002 \u8868 4. \u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u5be6\u9a57\u4e8c\u7d50\u679c PER LOC ORG Total altavista_4 48.30% 74.29% 62.71% 67.45% altavista_5 48.30% 77.45% 62.71% 69.54% altavista_5_2 23.16% 76.40% 62.71% 59.39% altavista_5_3 40.27% 77.48% 62.71% 67.34% altavista_5_4 47.93% 77.65% 62.71% 69.28% altavista_5_5 50.91% 77.45% 62.71% 69.81% altavista_5_6 48.45% 77.45% 62.71% 69.57% google_4 61.40% 75.61% 55.15% 67.77% google_5 61.40% 78.94% 55.15% 70.02% google_5_2 30.07% 77.95% 55.15% 60.12% google_5_3 51.25% 78.91% 55.15% 67.92% google_5_4 58.12% 78.99% 55.15% 69.38% google_5_5 63.91% 78.94% 55.15% 70.32% google_5_6 61.21% 78.94% 55.15% 70.00% 3.3.3. \u5be6\u9a57\u4e09 \u5be6\u9a57\u4e09 \u5be6\u9a57\u4e09 \u5be6\u9a57\u4e09\uff1a \uff1a \uff1a \uff1a\u6df7\u5408\u4f7f\u7528 \u6df7\u5408\u4f7f\u7528 \u6df7\u5408\u4f7f\u7528 \u6df7\u5408\u4f7f\u7528 Google \u548c \u548c \u548c \u548c AltaVista \u7684 \u7684 \u7684 \u7684\u7d71\u8a08\u503c \u7d71\u8a08\u503c \u7d71\u8a08\u503c \u7d71\u8a08\u503c \u672c\u5be6\u9a57\u7d50\u5408\u6b64\u5169\u641c\u5c0b\u5f15\u64ce\u7684\u512a\u9ede\uff1a\u7576\u6211\u5011\u8981\u8fa8\u8b58\u4e00\u8a5e\u4e32\u662f\u5426\u70ba\u4eba\u540d\u3001\u6216\u5730\u540d\u6642\uff0c\u63a1\u7528 Google \u641c\u5c0b\u56de\u4f86\u7684\u7db2\u9801\u6578\u4ee3\u5165\u516c\u5f0f\u6aa2\u9a57\u3002\u5982\u679c\u8981\u8fa8\u8b58\u662f\u5426\u70ba\u7d44\u7e54\u540d\uff0c\u6240\u5957\u5165\u516c\u5f0f\u7684\u53c3\u6578\u503c\uff0c\u5247\u662f\u63a1\u7528 AltaVista \u6240\u50b3\u56de\u7684\u7db2\u9801\u6578\u3002\u8868 5 \u4e2d\u7684 mix_1 \u8868\u793a\u4ee5\u4fee\u6539\u5f8c\u7684\u516c\u5f0f\uff0c\u4ee5\u53ca\u6df7\u5408\u4f7f\u7528 Google \u548c AltaVista \u7684\u7d71\u8a08\u503c\u5f8c\u7684\u5be6\u9a57\u7d50\u679c\uff0cmix_2 \u8868\u793a\u589e\u52a0\u570b\u540d\u7e2e\u5beb\u7684\u6a19\u8a18\u5f8c\u7684\u5be6\u9a57\u7d50\u679c\u3002mix_2_n \u8868\u793a \u6211\u5011\u6aa2\u67e5\u9023\u7e8c\u51fa\u73fe n \u500b\u4ee5\u4e0a\u7684\u55ae\u5b57\u8a5e\u662f\u5426\u901a\u904e\u6aa2\u9a57\u3002 \u8868 5. \u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u5be6\u9a57\u4e09\u7d50\u679c PER LOC ORG Total mix_1 60.30% 75.47% 62.69% 69.56% mix_2 60.30% 78.80% 62.69% 71.69% mix_2_3 50.00% 78.76% 62.69% 69.47% mix_2_4 56.49% 78.85% 62.69% 70.90% mix_2_5 62.43% 78.80% 62.69% 71.92% 3.3.4. \u5be6\u9a57\u56db \u5be6\u9a57\u56db \u5be6\u9a57\u56db \u5be6\u9a57\u56db\uff1a \uff1a \uff1a \uff1a\u522a\u9664\u6e2c\u8a66\u8cc7 \u522a\u9664\u6e2c\u8a66\u8cc7 \u522a\u9664\u6e2c\u8a66\u8cc7 \u522a\u9664\u6e2c\u8a66\u8cc7\u6599\u5167\u7db2\u9801\u6578\u7b49\u65bc \u6599\u5167\u7db2\u9801\u6578\u7b49\u65bc \u6599\u5167\u7db2\u9801\u6578\u7b49\u65bc \u6599\u5167\u7db2\u9801\u6578\u7b49\u65bc 0 \u7684\u7b54\u6848 \u7684\u7b54\u6848 \u7684\u7b54\u6848 \u7684\u7b54\u6848 \u4ee5\u5168\u7403\u8cc7\u8a0a\u7db2\u70ba\u57fa\u790e\u7684\u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\uff0c\u6548\u80fd\u7684\u597d\u58de\u53d6\u6c7a\u65bc\u7db2\u8def\u4e0a\u662f\u5426\u6709\u6536\u9304\u6b64\u8a5e\u5f59\u7684\u8cc7\u8a0a\u3002 \u5982\u679c\u6c92\u6709\uff0c\u641c\u5c0b\u7d50\u679c\u7684\u7db2\u9801\u6578\u5c31\u6703\u662f\u96f6\uff0c\u4e0d\u80fd\u901a\u904e\u6aa2\u9a57\uff0c\u56e0\u6b64\u907a\u6f0f\u6b64\u7b54\u6848\u3002\u6211\u5011\u60f3\u77e5\u9053\u5728\u6700\u4f73\u60c5 \u6cc1\u4e0b\uff0c\u6b64\u6f14\u7b97\u6cd5\u7684\u6548\u80fd\uff0c\u5373\u6bcf\u500b\u6e2c\u8a66\u6587\u4ef6\u4e2d\u7684\u6307\u5b9a\u5be6\u9ad4\u90fd\u53ef\u4ee5\u627e\u5230\u5c0d\u61c9\u7684\u7d71\u8a08\u503c\uff0c\u6240\u4ee5\u5c07\u539f\u4f86\u6e2c \u8a66\u6587\u4ef6\u6839\u64da Google \u548c AltaVista \u505a\u4e86\u5169\u4efd\u4e0d\u540c\u7684\u4fee\u6539\uff0c\u628a\u7db2\u9801\u6578\u7b49\u65bc 0 \u7684\u6307\u5b9a\u5be6\u9ad4\u5f9e\u539f\u59cb\u6587\u4ef6\u4e2d \u522a\u9664\uff0c\u4ee5\u6b64\u4fee\u6539\u5f8c\u7684\u6587\u4ef6\u7576\u505a\u7cfb\u7d71\u7684\u8f38\u5165\u8cc7\u6599\u3002\u8868 6 \u4e2d\u7684 altavista_6 \u548c google_6 \u662f\u4ee5\u4fee\u6539\u5f8c\u7684 \u6f14\u7b97\u6cd5\uff0c\u914d\u5408\u589e\u52a0\u6536\u9304\u5730\u540d\u7684\u8fad\u5178\u6240\u5f97\u5230\u7684\u7d50\u679c\uff0caltavista_7 \u548c google_7 \u8868\u793a\u589e\u52a0\u570b\u540d\u7e2e\u5beb\u7684\u6a19 \u8a18\uff0caltavista_7_n \u548c google_7_n \u8868\u793a\u6211\u5011\u6aa2\u67e5\u9023\u7e8c\u51fa\u73fe n \u500b\u4ee5\u4e0a\u7684\u55ae\u5b57\u8a5e\u662f\u5426\u901a\u904e\u6aa2\u9a57\u3002 \u8868 6. \u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u5be6\u9a57\u5be6\u9a57\u56db\u7d50\u679c PER LOC ORG Total altavista_6 67.53% 80.96% 78.16% 78.74% altavista_7 67.53% 84.75% 78.16% 81.18% altavista_7_4 66.67% 84.81% 78.16% 80.94% altavista_7_5 70.29% 84.75% 78.16% 81.42% google_6 64.74% 77.55% 58.93% 70.58% google_7 64.74% 81.06% 58.93% 72.93% google_7_4 61.16% 81.12% 58.93% 72.26% google_7_5 67.50% 81.06% 58.93% 73.27% \u8868 6 \u986f\u793a AltaVista \u7684\u5be6\u9a57\u7d50\u679c\u6bd4 Google \u597d\uff0c\u539f\u56e0\u4e4b\u4e00\u662f\u5728 AltaVista \u7684\u5be6\u9a57\uff0c\u6211\u5011\u5f9e\u6e2c\u8a66 \u6587\u4ef6\u522a\u9664\u8f03\u591a\u7684\u6307\u5b9a\u5be6\u9ad4\uff0c\u6240\u4ee5\u8981\u8fa8\u8b58\u7684\u6307\u5b9a\u5be6\u9ad4\u500b\u6578 AltaVista \u5be6\u9a57\u6bd4 Google \u5be6\u9a57\u5c11\u3002\u53e6\u5916\uff0c \u67d0\u4e9b\u8a5e\u5f59\u5728 Google \u7684\u4e09\u500b\u7d71\u8a08\u503c( ) (w pc , ) ( left w pc , ) ( right w pc )\uff0c\u96d6\u7136\u90fd\u4e0d\u7b49\u65bc\u96f6\uff0c\u4f46\u5957\u9032\u516c \u5f0f\u8a08\u7b97\u4e4b\u5f8c\u7684\u7d50\u679c\uff0c\u537b\u4e0d\u80fd\u901a\u904e\u6aa2\u9a57\u3002\u4f8b\u5982\u300c\u65b0\u83ef\u793e\u300d\u7b49\u8a5e\u5f59\uff0c\u56e0\u800c\u9020\u6210 Google \u7121\u6cd5\u8fa8\u8b58\u51fa\u9019 \u4e9b\u6307\u5b9a\u5be6\u9ad4\u3002\u5c0d\u61c9\u4e4b\u4e0b\uff0cAltaVista \u4e2d\u5e7e\u4e4e\u4e0d\u767c\u751f\u9019\u7a2e\u60c5\u5f62\uff0c\u552f\u4e00\u4f8b\u5916\u7684\u4f8b\u5b50\u662f\u300c\u7f85\u4fcf\u300d\u9019\u500b\u8a5e\u3002 3.4. \u5206\u6790\u8207\u8a0e\u8ad6 \u5206\u6790\u8207\u8a0e\u8ad6 \u5206\u6790\u8207\u8a0e\u8ad6 \u5206\u6790\u8207\u8a0e\u8ad6 3.4.1. \u6e2c\u8a66\u8cc7\u6599\u4e4b\u5206\u6790 \u6e2c\u8a66\u8cc7\u6599\u4e4b\u5206\u6790 \u6e2c\u8a66\u8cc7\u6599\u4e4b\u5206\u6790 \u6e2c\u8a66\u8cc7\u6599\u4e4b\u5206\u6790 \u5728 MET-2 \u6e2c\u8a66\u8a9e\u6599\u4e2d\uff0c\u5168\u90e8\u5171\u6709 1,301 \u500b\u6307\u5b9a\u5be6\u9ad4\uff0c\u55ae\u5b57\u8a5e\u56e0\u70ba\u53ea\u5305\u542b\u4e00\u500b\u5b57\u5143\uff0c\u6240\u4ee5\u7121 \u6cd5\u5957\u7528\u516c\u5f0f\u3002\u4e0d\u5305\u542b\u91cd\u8907\uff0c\u4e14\u53ef\u4f9b\u6aa2\u6e2c\u7684\u6307\u5b9a\u5be6\u9ad4\u5171\u6709 384 \u500b\uff0c\u6211\u5011\u5206\u6790\u9019 384 \u500b\u6307\u5b9a\u5be6\u9ad4\uff0c\u7d50 \u679c\u5982\u8868 7 \u6240\u793a\u3002 \u8868 7. \u6e2c\u8a66\u8cc7\u6599\u5206\u6790 \u901a\u904e\u6aa2\u6e2c \u672a\u901a\u904e\u6aa2\u6e2c \u7db2\u9801\u6578\u7b49\u65bc 0 substring page count \u8f03 superstring \u5c11 AltaVista Google AltaVista Google AltaVista Google AltaVista Google PER 70 97 36 9 35 9 1 27 LOC 108 112 16 12 16 6 3 84 ORG 92 122 62 32 62 22 9 121 Total 270 331 114 53 113 37 13 236 \u5c31 AltaVista \u800c\u8a00\uff0c\u672a\u901a\u904e\u7684\u6307\u5b9a\u5be6\u9ad4\u7e3d\u5171\u6709 114 \u500b\uff0c\u800c\u7db2\u9801\u6578\u7b49\u65bc\u96f6\u7684\u6709 113 \u500b\uff0c\u731c\u6e2c\u6aa2 \u9a57\u4e0d\u901a\u904e\u7684\u539f\u56e0\uff0c\u53ef\u80fd\u662f\u4f86\u81ea\u65bc\u641c\u5c0b\u5f15\u64ce\u6240\u6536\u9304\u7684\u7db2\u9801\u4e2d\u6c92\u6709\u5305\u542b\u6b64\u8a5e\u5f59\u7684\u8cc7\u8a0a\u3002\u5982\u679c\u641c\u5c0b\u7d50\u679c \u7684\u7db2\u9801\u6578\u5927\u65bc\u96f6\uff0c\u5e7e\u4e4e\u5927\u90e8\u5206\u90fd\u901a\u904e\u6aa2\u9a57\u3002\u552f\u4e00\u7684\u4f8b\u5916\u5c31\u662f\u300c\u7f85\u4fcf\u300d\u9019\u500b\u4eba\u540d\uff0c\u96d6\u7136 AltaVista \u53ef\u4ee5\u641c\u5c0b\u5230\u6709\u95dc\u9019\u500b\u8a5e\u7684\u7db2\u9801\uff0c\u53ef\u662f\u9019\u4e9b\u6578\u503c\u4ee3\u5165\u516c\u5f0f\u5f8c\uff0c\u4e26\u4e0d\u901a\u904e\u6aa2\u9a57\u3002\u5c31 Google \u800c\u8a00\uff0c\u672a \u901a\u904e\u7684\u6307\u5b9a\u5be6\u9ad4\u7e3d\u5171\u6709 53 \u500b\uff0c\u800c\u7db2\u9801\u6578\u7b49\u65bc\u96f6\u7684\u53ea\u6709 37 \u500b\uff0c\u9019\u8868\u793a\u6709 16 \u500b\u6307\u5b9a\u5be6\u9ad4\u96d6\u7136\u5728 Google \u4e0a\u53ef\u4ee5\u641c\u5c0b\u5230\u76f8\u95dc\u7db2\u9801\uff0c\u53ef\u662f\u9019\u4e9b\u6578\u503c\u4ee3\u5165\u516c\u5f0f\uff0c\u4e26\u4e0d\u6703\u901a\u904e\u901a\u904e\u6aa2\u9a57\uff0c\u4f8b\u5982\u300c\u65b0\u83ef\u793e\u300d \u3002 \u9032\u4e00\u6b65\u5206\u6790\u7db2\u9801\u6578\u7b49\u65bc\u96f6\uff0c\u4ee5\u53ca\u901a\u4e0d\u901a\u904e\u6aa2\u5b9a\uff0c\u548c\u641c\u5c0b\u5f15\u64ce\u5167\u90e8\u7684\u8a2d\u8a08\u9593\u7684\u95dc\u4fc2\u3002\u8003\u616e\u539f\u59cb \u6aa2\u9a57\u7684\u4e09\u500b\u91cd\u8981\u53c3\u6578\uff1a k c c c w ... 2 1 = \u3001 1 2 1 ... \u2212 = k left c c c w \u3001\u53ca k right c c c w ... 3 2 = \uff0c\u6211\u5011\u6545\u610f\u5c07 \u7d44\u5408\u6210\u6307\u5b9a\u5be6\u9ad4\u7684\u8fad\u5f59\u982d\u5c3e\u5404\u53bb\u9664\u4e00\u500b\u5b57\u5143\uff0c\u4f8b\u5982\u300c\u827e\u7279\u7d0d\u4fdd\u96aa\u516c\u53f8\u300d \uff0c\u5247 left w \u70ba\u300c\u827e\u7279\u7d0d\u4fdd\u96aa \u516c\u300d \uff0c right w \u70ba\u300c\u7279\u7d0d\u4fdd\u96aa\u516c\u53f8\u300d \u3002\u5728 substring \u7684\u7d50\u5408\u6027\u6bd4 superstring \u5f31\u7684\u5047\u8a2d\u4e0b\uff0c left w \u548c right w \u7684 \u7db2\u9801\u6578\u61c9\u8a72\u5927\u65bc w \u7684\u7db2\u9801\u6578\uff0c\u53ef\u80fd\u6bd4\u4f8b\u6e2c\u8a66\u5c31\u5efa\u7acb\u5728\u9019\u500b\u5047\u8a2d\u4e4b\u4e0b\u3002AltaVista \u5b8c\u5168\u7528\u5b57\u4e32\u6bd4\u5c0d\uff0c \u4e0a\u8ff0\u5047\u8a2d\u662f\u6210\u7acb\u7684\uff0c\u5176\u4e3b\u8981\u7684\u554f\u984c\u662f\u7db2\u9801\u6578\u7b49\u65bc\u96f6\u7684\u60c5\u6cc1\u592a\u591a\u3002\u731c\u6e2c\u7684\u539f\u56e0\u662f\uff0c\u5730\u540d\u548c\u7d44\u7e54\u540d\u90fd \u6bd4\u8f03\u9577\u3002\u76f8\u5c0d\u7684\uff0cGoogle \u7d93\u67e5\u8a5e\u8655\u7406\uff0c\u524d\u8ff0\u7684\u5047\u8a2d\u53ef\u80fd\u5c31\u4e0d\u6210\u7acb\uff0c\u9020\u6210\u6bd4\u4f8b\u6e2c\u8a66\u4e0d\u901a\u904e\uff0c\u4f46\u5176 \u7db2\u9801\u6578\u7b49\u65bc\u96f6\u7684\u60c5\u6cc1\u8f03\u5c11\u3002 3.4.2. \u932f\u8aa4\u5206\u6790 \u932f\u8aa4\u5206\u6790 \u932f\u8aa4\u5206\u6790 \u932f\u8aa4\u5206\u6790 \u56e0\u70ba\u67d0\u4e9b\u6307\u5b9a\u5be6\u9ad4\u672c\u8eab\u5305\u542b\u505c\u7528\u5b57\uff0c\u4f8b\u5982\u300c\u7f8e\u570b\u822a\u7a7a\u822a\u5929\u5c40\u300d\u548c\u300c\u694a\u5929\u300d\u4e2d\u7684\u300c\u5929\u300d\u662f\u505c\u7528 \u5b57\uff0c\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\u7cfb\u7d71\u5c31\u7121\u6cd5\u6b63\u78ba\u5730\u8fa8\u8b58\u51fa\u3002\u67d0\u4e9b\u5916\u570b\u4eba\u540d\u7684\u932f\u8aa4\uff1a \u300c\u585e\u842c\u63d0\u65af\u300d\u6703\u8b8a\u8fa8\u8b58\u6210\u300c\u842c \u63d0\u65af\u300d \uff0c\u56e0\u70ba\u300c\u842c\u300d\u662f\u4e2d\u6587\u4eba\u540d\u59d3\u6c0f\u3002\u90e8\u5206\u932f\u8aa4\u662f\u56e0\u70ba\u6307\u5b9a\u5be6\u9ad4\u592a\u9577\uff0c\u5982\u300c\u4e2d\u570b\u885b\u661f\u767c\u5c04\u6e2c\u63a7\u7cfb \u7d71\u90e8\u300d\u6703\u88ab\u65b7\u8a5e\u6210\u300c\u4e2d\u570b \u885b\u661f \u767c\u5c04 \u6e2c \u63a7 \u7cfb\u7d71 \u90e8\u300d \uff0c \u300c\u90e8\u300d\u662f\u7d44\u7e54\u540d\u7684\u95dc\u9375\u5b57\uff0c\u6211\u5011\u6700\u591a\u53ea\u5f80 \u524d\u627e\u4e94\u500b\u8a5e\uff0c\u56e0\u6b64\u300c\u885b\u661f\u767c\u5c04\u6e2c\u63a7\u7cfb\u7d71\u90e8\u300d \uff0c\u5c31\u6703\u88ab\u8fa8\u8b58\u70ba\u7d44\u7e54\u540d\uff0c\u5c6c\u65bc\u5de6\u908a\u754c\u932f\u8aa4\u3002 \u6709\u4e9b\u932f\u8aa4\u662f\u56e0\u70ba\u7db2\u9801\u6578\u7b49\u65bc\u96f6\u6240\u5f15\u8d77\u7684\uff0c\u6240\u4ee5\u6703\u9020\u6210 MIS \u6216 INC \u7684\u932f\u8aa4\u3002\u50cf\u662f\u628a\u300c\u7f8e\u570b\u827e \u79d1\u65af\u9054\u885b\u661f\u516c\u53f8\u300d \uff0c\u8fa8\u8b58\u70ba\u300c\u65af\u9054\u885b\u661f\u516c\u53f8\u300d \u3002\u6709\u6642\u5019\u7db2\u9801\u6578\u7b49\u65bc\u96f6\u4e0d\u53ea\u6703\u9020\u6210 INC \u932f\u8aa4\uff0c\u540c\u6642 \u4e5f\u6703\u589e\u52a0 SPU \u932f\u8aa4\uff0c\u4f8b\u5982\u300c\u9999\u6e2f\u4e9e\u592a\u901a\u4fe1\u885b\u661f\u516c\u53f8\u300d \uff0c\u6703\u88ab\u8fa8\u8b58\u70ba\u300c\u9999\u6e2f(LOC) \u4e9e\u592a\u901a\u4fe1\u885b\u661f\u516c \u53f8(ORG)\u300d \uff1b \u300c\u4e2d\u570b\u7a7a\u9593\u6280\u8853\u7814\u7a76\u6240\u300d \uff0c\u6703\u88ab\u8fa8\u8b58\u70ba\u300c\u4e2d\u570b(LOC) \u7a7a\u9593\u6280\u8853\u7814\u7a76\u6240(ORG)\u300d \u3002\u6709\u4e9b\u6307 \u5b9a\u5be6\u9ad4\u7684\u7db2\u9801\u6578\u96d6\u7136\u5927\u65bc\u96f6\uff0c\u53ef\u662f\u537b\u4e0d\u6703\u901a\u904e\u516c\u5f0f\u6aa2\u9a57\uff0c\u6703\u9020\u6210 MIS \u932f\u8aa4\uff0c\u5982\u300c\u65b0\u83ef\u793e\u300d\u548c\u300c\u6b50 \u7e3d\u7d50\uff0c\u9020\u6210\u907a\u6f0f\u932f\u8aa4\u7684\u539f\u56e0\u6709\uff1a 1. \u6307\u5b9a\u5be6\u9ad4\u672c\u8eab\u5305\u542b\u505c\u7528\u5b57\u3002 2. \u7db2\u9801\u6578\u7b49\u65bc 0\u3002 3. \u6307\u5b9a\u5be6\u9ad4\u672c\u8eab\u6c92\u6709\u95dc\u9375\u5b57\uff0c\u50cf\u662f\u300e\u6cd5\u5854\u8d6b\u300f\u6b66\u88dd\u3001\u4e94\u89d2\u5927\u6a13\u7b49\uff0c\u9019\u985e\u578b\u7684\u6307\u5b9a \u5be6\u9ad4\u56e0\u70ba\u7f3a\u4e4f\u95dc\u9375\u5b57\uff0c\u6240\u4ee5\u7121\u6cd5\u9a45\u52d5\u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u3002 4. \u6709\u4e9b\u570b\u540d\u7684\u7e2e\u5beb\u6c92\u8fa6\u6cd5\u8fa8\u8b58\u51fa\uff0c\u4f8b\u5982\u300c\u4e2d\u300d \u3001 \u300c\u4ee5\u300d \u3001 \u300c\u65e5\u300d\u7b49\u3002 5. \u6709\u4e9b\u6307\u5b9a\u5be6\u9ad4\u7684\u95dc\u9375\u5b57\uff0c\u4e26\u6c92\u6709\u6536\u9304\u5728\u95dc\u9375\u5b57\u96c6\u4e2d\uff0c\u56e0\u6b64\u4e0d\u6703\u9a45\u52d5\u6307\u5b9a\u5be6\u9ad4\u7684 \u8fa8\u8b58\u5de5\u4f5c\uff0c\u4f8b\u5982\u300c\u65e5\u672c\u79d1\u6280\u5ef3\u300d\u4e2d\u7684\u300c\u5ef3\u300d \u3002 6. \u5916\u570b\u4eba\u540d\u4e0d\u4e00\u5b9a\u6703\u88ab\u65b7\u8a5e\u70ba\u9023\u7e8c\u7684\u55ae\u5b57\u8a5e\uff0c\u56e0\u6b64\u7121\u6cd5\u85c9\u7531\u9023\u7e8c\u55ae\u5b57\u8a5e\u7684\u7b56\u7565\u4f86 \u8fa8\u8b58\u3002 \u591a\u9918\u932f\u8aa4\u767c\u751f\u7684\u539f\u56e0\u6709\uff1a 1. \u7db2\u9801\u6578\u7b49\u65bc\u96f6\u3002 2. \u901a\u904e\u516c\u5f0f\u6aa2\u9a57\uff0c\u4f46\u5be6\u969b\u4e0a\u4e26\u4e0d\u662f\u5c08\u6709\u540d\u8a5e\uff0c\u4f8b\u5982\u300c\u79c1\u4eba\u516c\u53f8\u300d \u3002 3. \u4eba\u9020\u885b\u661f\u7684\u540d\u7a31\u300c\u4e9e\u6d32\u4e8c\u865f\u300d \uff0c\u7cfb\u7d71\u5c07\u300c\u4e9e\u6d32\u300d\u6a19\u8a18\u70ba\u5730\u540d\u3002 4. \u9023\u7e8c\u55ae\u5b57\u8a5e\u7684\u6a19\u8a18\uff0c\u5e38\u5e38\u6703\u6a19\u8a18\u932f\u8aa4\u70ba\u4eba\u540d\u3002 \u7531\u672c\u5be6\u9a57\u53ef\u4ee5\u8aaa\u660e\uff1a\u5168\u7403\u8cc7\u8a0a\u7db2\u7684\u67e5\u8a62\u7d50\u679c\uff0c\u548c\u641c\u5c0b\u5f15\u64ce\u7684\u5167\u90e8\u8a2d\u8a08\u6709\u95dc\u3002\u85c9\u7531\u95dc\u9375\u5b57\u9a45\u52d5 \u8fa8\u8b58\u5de5\u4f5c\uff0c\u900f\u904e\u641c\u5c0b\u5f15\u64ce\u5f97\u5230\u7db2\u9801\u6578\uff0c\u5957\u5165\u53ef\u80fd\u6bd4\u4f8b\u6e2c\u8a66\u4e2d\uff0c\u53ef\u4ee5\u5224\u65b7\u4e00\u500b\u5b57\u4e32\u662f\u5426\u70ba\u6307\u5b9a\u5be6\u9ad4\u3002 4. \u65b7\u8a5e\u8207\u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u7684\u6574\u5408 \u65b7\u8a5e\u8207\u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u7684\u6574\u5408 \u65b7\u8a5e\u8207\u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u7684\u6574\u5408 \u65b7\u8a5e\u8207\u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u7684\u6574\u5408 4.1. \u5be6\u9a57\u8cc7\u6e90 \u5be6\u9a57\u8cc7\u6e90 \u5be6\u9a57\u8cc7\u6e90 \u5be6\u9a57\u8cc7\u6e90 CTS \u8a9e\u6599\u662f\u7531\u83ef\u8996\u65b0\u805e\u5167\u5bb9\u6240\u6536\u96c6\u800c\u6210\uff0c\u6587\u672c\u8207\u4e2d\u7814\u9662\u5e73\u8861\u8a9e\u6599\u5eab\u63a1\u7528\u76f8\u540c\u7684\u65b7\u8a5e\u6a19\u6e96\u8207 \u8a5e\u6027\u6a19\u8a18\u3002\u6307\u5b9a\u5be6\u9ad4\uff0c\u6703\u88ab\u6a19\u8a18\u70ba\u9023\u7e8c\u8a5e\u5f59\uff0c\u4f8b\u5982\u300c\u7f8e\u5546\u5947\u7570\u516c\u53f8\u300d \uff0c\u88ab\u65b7\u70ba\u300c\u7f8e\u5546/\u5947\u7570/\u516c\u53f8\u300d \uff0c \u4f46\u662f\u5728\u81ea\u7136\u8a9e\u8a00\u8655\u7406\u61c9\u7528\uff0c\u6211\u5011\u5e0c\u671b\u65b7\u8a5e\u7684\u7d50\u679c\u662f\u5c07\u6240\u6709\u5177\u6709\u300c\u5b8c\u6574\u8a9e\u610f\u300d\u7684\u8a5e\u5f59\u5207\u5206\u51fa\u908a\u754c\uff0c \u5373\u6211\u5011\u5e0c\u671b\u5f97\u5230\u7684\u662f\u300c\u7f8e\u5546\u5947\u7570\u516c\u53f8\u300d \uff0c\u56e0\u6b64\u6211\u5011\u5c0d\u65bc\u4eba\u540d\u3001\u5730\u540d\u3001\u548c\u7d44\u7e54\u540d\u9019\u4e09\u7a2e\u578b\u614b\u7684\u6307\u5b9a \u5be6\u9ad4\uff0c\u4ee5\u4eba\u5de5\u6a19\u8a18\u7684\u65b9\u5f0f\uff0c\u5c07\u9019\u4e9b\u88ab\u62c6\u958b\u7684\u5c08\u6709\u540d\u8a5e\uff0c\u7d44\u5408\u8d77\u4f86\u6210\u70ba\u55ae\u4e00\u7684\u8a5e\u5f59\u3002\u7528\u6b64\u4fee\u6539\u904e\u7684 \u8a9e\u6599\u4f5c\u70ba\u6e2c\u8a66\u8a9e\u6599\uff0c\u89c0\u5bdf\u589e\u52a0\u672a\u77e5\u8a5e\u5075\u6e2c\uff0c\u5c0d\u65b7\u8a5e\u7d50\u679c\u6240\u5e36\u4f86\u7684\u5f71\u97ff\u3002 4.2. \u5be6\u9a57\u6b65\u9a5f \u5be6\u9a57\u6b65\u9a5f \u5be6\u9a57\u6b65\u9a5f \u5be6\u9a57\u6b65\u9a5f \u9996\u5148\u7d93\u904e\u67e5\u5b57\u5178\u7684\u6b65\u9a5f\uff0c\u627e\u51fa\u5404\u7a2e\u5019\u9078\u8a5e\u5f59\uff0c\u7136\u5f8c\u6383\u63cf\u8a5e\u4e32\uff0c\u9032\u884c\u6307\u5b9a\u5be6\u9ad4\u8fa8\u8b58\u3002\u5982\u679c\u67d0\u4e9b \u76f8\u9130\u7684\u8a5e\u4e32\u7d93\u8fa8\u8b58\u51fa\u70ba\u5c6c\u65bc\u4eba\u540d\u3001\u5730\u540d\u3001\u6216\u662f\u7d44\u7e54\u540d\uff0c\u8868\u793a\u6211\u5011\u5075\u6e2c\u5230\u672a\u77e5\u8a5e\uff0c\u5247\u5c07\u9019\u4e9b\u8a5e\u5f59\u7d44 \u5408\u8d77\u4f86\u6210\u70ba\u55ae\u4e00\u8a5e\u3002\u6700\u5f8c\u9032\u884c\u89e3\u6b67\u7fa9\u6027\u6b65\u9a5f\uff0c\u627e\u51fa\u6b64\u53e5\u5b50\u7684\u6700\u4f73\u65b7\u8a5e\u7d44\u5408\u3002 4.3. \u7d50\u679c\u8207\u8a0e\u8ad6 \u7d50\u679c\u8207\u8a0e\u8ad6 \u7d50\u679c\u8207\u8a0e\u8ad6 \u7d50\u679c\u8207\u8a0e\u8ad6 \u8868 8 \u70ba\u5be6\u9a57\u7d50\u679c\uff0c1_corpus\u30011_google\u30011_altavista \u8868\u793a\u50c5\u4ee5\u8fad\u5178\u65b7\u8a5e\uff0c\u672a\u52a0\u4e0a\u6307\u5b9a\u5be6\u9ad4\u8fa8 \u8b58\u6a21\u7d44\u7684\u5be6\u9a57\u30022_google_uw\u30012_altavista_uw\uff0c\u5247\u662f\u8fa8\u8b58\u51fa\u672a\u77e5\u8a5e\u4e4b\u5f8c\uff0c\u624d\u9032\u884c\u89e3\u6b67\u7fa9\u7684\u5be6\u9a57\u3002 2_google_corpus_uw \u5247\u662f\u4ee5 Google \u7d71\u8a08\u503c\u8fa8\u8b58\u51fa\u672a\u77e5\u8a5e\uff0c\u9019\u4e9b\u8fa8\u8b58\u51fa\u4f86\u7684\u6307\u5b9a\u5be6\u9ad4\uff0c\u5c07\u8f38\u5165\u53e5 \u5b50\u5207\u5206\u6210\u5e7e\u500b\u5c0f\u53e5\u5b50\uff0c\u5373\u300cS1 UW1 S2 UW 2 S3 \u2026\u300d \uff0c\u6211\u5011\u518d\u5206\u5225\u4ee5\u8a9e\u6599\u5eab\u7d71\u8a08\u503c\uff0c\u5c0d \u9019\u4e9b\u5c0f\u53e5\u5b50 S1\u3001S2 \u7b49\u9032\u884c\u6b67\u7fa9\u6027\u5206\u6790\u3002 Precision F-Measure 1_corpus 94.03% 90.79% 92.38% 1_google 93.07% 89.43% 91.21% 1_altavista 92.45% 88.27% 90.31% 2_google_uw 94.11% 93.02% 93.57% 2_altavista_uw 93.42% 91.45% 92.42% 3_google_corpus_uw 95.02% 94.31% 94.66% \u6e2c\u8a66\u6587\u4ef6\u5171\u5305\u542b 7,169 \u500b\u8a5e\uff0c\u5176\u4e2d\u6709 224 \u500b\u672a\u6536\u9304\u5728\u7cfb\u7d71\u8fad\u5178\u5167\u7684\u8a5e\u5f59\u3002\u9019\u4e9b\u672a\u77e5\u8a5e\uff0c\u5305\u542b \u666e\u901a\u540d\u8a5e\u300c\u7b49\u58d3\u7dda\u300d \u3001 \u300c\u570b\u969b\u7d04\u300d \uff0c\u6216\u662f\u52d5\u8a5e\u300c\u62d8\u63d0\u300d \u3001 \u300c\u6536\u8cc4\u300d \uff0c\u4ee5\u53ca\u5c08\u6709\u540d\u8a5e\u300c\u83ef\u8996\u665a\u9593\u65b0\u805e\u300d \u3001 \u300c\u9b4f \u653f\u8ce2\u300d\u7b49\u3002\u6211\u5011\u5229\u7528 web \u8cc7\u8a0a\uff0c\u53ef\u4ee5\u8fa8\u8b58\u51fa\u672a\u77e5\u8a5e\uff0c\u4f8b\u5982\u300c\u9b4f\u653f\u8ce2\u300d \u3001 \u300c\u5927\u5091\u65c5\u884c\u793e\u300d \u3001 \u300c\u4e2d\u5c71\u8db3 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\u53c3\u8003\u6587\u737b \u53c3\u8003\u6587\u737b \u53c3\u8003\u6587\u737b \u53c3\u8003\u6587\u737b \u6d32\u5b87\u822a\u5c40\u300d\u7b49\u3002 \u56e0\uff0c\u5305\u62ec\u6307\u5b9a\u5be6\u9ad4\u672c\u8eab\u5305\u542b\u505c\u7528\u5b57\u3001\u7db2\u9801\u6578\u7b49\u65bc\u96f6\u3001\u6307\u5b9a\u5be6\u9ad4\u9577\u5ea6\u592a\u9577\u7b49\u56e0\u7d20\u3002 \u9ad4\u908a\u754c\u932f\u8aa4\uff0c\u4f8b\u5982\u300c\u897f\u660c\u885b\u661f\u767c\u5c04\u4e2d\u5fc3\u300d \uff0c\u8fa8\u8b58\u70ba\u300c\u62b5\u904b\u897f\u660c\u885b\u661f\u767c\u5c04\u4e2d\u5fc3\u300d \u3002\u9020\u6210\u9019\u7a2e\u932f\u8aa4\u7684\u539f \u6211\u5011\u9032\u4e00\u6b65\u5206\u6790\u5404\u7a2e\u932f\u8aa4\u60c5\u5f62\u3002\u9996\u5148\u662f INC \u932f\u8aa4\uff0c\u9019\u985e\u578b\u932f\u8aa4\u5c31\u662f\u6307\u7cfb\u7d71\u8fa8\u8b58\u51fa\u7684\u6307\u5b9a\u5be6 [1]</td></tr></table>", | |
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| "type_str": "table", | |
| "num": null | |
| } | |
| } | |
| } | |
| } |