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| "text": "\u548c k-NN \u65b9\u6cd5 [Aas, 1999] ", |
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| "text": "jchiang@mail.ncku.edu.tw", |
| "content": "<table><tr><td>\u5f88 \u591a \u5728 \u505a \u6587 \u4ef6 \u5206 \u985e \u7684 \u65b9 \u6cd5 \u4e2d \uff0c \u4f8b \u5982 \u4f7f \u7528 \u898f \u5247 \u5eab (rule-based) \u3001 \u77e5 \u8b58 \u5eab \u5716\u4e00\u4e2d\u7684\u865b\u7dda\u7bad\u982d\u90e8\u4efd\u5247\u662f\u6574\u500b\u6e2c\u8a66\u6d41\u7a0b\uff0c\u8d77\u521d\u4e5f\u662f\u5c07\u4e00\u65b0\u6587\u4ef6\u7d93\u904e\u4e00\u9023\u4e32 (tree structure)\uff0c\u5176\u5167\u90e8\u7bc0\u9ede\u662f\u9598\u9580\u3001\u6a39\u8449\u7bc0\u9ede\u662f\u5c08\u5bb6\u3002\u5716\u4e8c\u5c31\u662f\u6211\u5011\u63d0\u51fa\u7684\u4e00\u500b \u795e\u7d93\u5143\u9593\u7684\u6b0a\u91cd\uff0c\u6b64\u51fd\u6578\u7576\u81ea\u8b8a\u6578\u8da8\u5411\u6b63\u8ca0\u7121\u9650\u5927\u6642\uff0c\u51fd\u6578\u503c\u8da8\u8fd1\u65bc\u5e38\u6578\uff0c\u5176\u51fd 4. \u5be6\u9a57\u7d50\u679c\u8207\u5206\u6790 \u5be6\u9a57\u7d50\u679c\u8207\u5206\u6790 \u5be6\u9a57\u7d50\u679c\u8207\u5206\u6790 \u5be6\u9a57\u7d50\u679c\u8207\u5206\u6790 4.2 \u7d50\u679c</td></tr><tr><td>(knowledge-based)\u3001\u6216\u6a23\u672c\u5eab(instance-based)\uff0e\uff0e\uff0e\u7b49\uff0c\u90fd\u662f\u4f9d\u8cf4\u5927\u91cf\u7684\u6a23\u672c\u4f86 \u7684\u524d\u5e8f\u8655\u7406\u5f8c\uff0c\u518d\u4f9d\u7279\u5fb5\u96c6\u8f49\u63db\u6210\u5411\u91cf\u5f62\u5f0f\uff0c\u6700\u5f8c\u900f\u904e\u968e\u5c64\u5f0f\u985e\u795e\u7d93\u7db2\u8def\u6a21\u7d44\uff0c \u4e94\u5c64\u7684\u968e\u5c64\u5f0f\u6a21\u7d44\u67b6\u69cb\u5716\u3002 \u6578\u503c\u57df\u5728[0,1]\u4e4b\u9593\u3002 4.1 \u8cc7\u6599\u96c6 \u5728\u8a55\u4f30\u6211\u5011\u7684\u6a21\u7d44\u6548\u80fd\u4e4b\u524d\uff0c\u6211\u5011\u8981\u5148\u91dd\u5c0d\u6211\u5011\u7684\u6a21\u7d44\u63d0\u51fa\u5169\u500b\u554f\u984c\uff1a1)</td></tr><tr><td>\u6c7a\u5b9a\u548c\u6587\u4ef6\u6709\u95dc\u7684\u898f\u5247\u6216\u77e5\u8b58\u3002\u4e00\u822c\u800c\u8a00\uff0c\u9019\u4e9b\u6a23\u672c\u96c6\u5408\u5fc5\u9808\u7531\u90a3\u4e9b\u5c0d\u61c9\u7528\u9818\u57df \u4ee5\u6c7a\u5b9a\u65b0\u6587\u4ef6\u6240\u5c6c\u7684\u985e\u5225\u3002 \u672c\u5be6\u9a57\u6240\u4f7f\u7528\u7684\u6e2c\u8a66\u8cc7\u6599\u96c6\uff0c\u662f\u7531 David D. Lewis [1996]\u548c\u8def\u900f\u793e\u4eba\u54e1\u6240\u5171 \u5728\u540c\u6a23\u4f7f\u7528\u985e\u795e\u7d93\u7db2\u8def\u65b9\u6cd5\u7684\u60c5\u6cc1\u4e0b\uff0c\u6709\u4f7f\u7528\u968e\u5c64\u5f0f\u67b6\u69cb\u548c\u6c92\u6709\u4f7f\u7528\u968e\u5c64\u5f0f\u67b6\u69cb</td></tr><tr><td>\u6709\u6df1\u5165\u8a8d\u8b58\u7684\u5c08\u5bb6\u4f86\u8a02\u5b9a\u8207\u5efa\u7acb\uff0c\u4e5f\u56e0\u6b64\uff0c\u9019\u4e9b\u65b9\u6cd5\u5e38\u5e38\u56e0\u70ba\u76f8\u95dc\u6a23\u672c\u5efa\u7acb\u5f97\u4e0d 3. \u7279\u5fb5\u9078\u53d6\u548c\u8a13\u7df4\u8cc7\u6599\u96c6\u9078\u53d6 \u7279\u5fb5\u9078\u53d6\u548c\u8a13\u7df4\u8cc7\u6599\u96c6\u9078\u53d6 \u7279\u5fb5\u9078\u53d6\u548c\u8a13\u7df4\u8cc7\u6599\u96c6\u9078\u53d6 \u7279\u5fb5\u9078\u53d6\u548c\u8a13\u7df4\u8cc7\u6599\u96c6\u9078\u53d6 \u540c\u6574\u7406\u800c\u6210\u7684\u8def\u900f\u793e\u65b0\u805e\u6027\u6587\u4ef6-Reuters-21578\u3002\u5728\u9019\u500b\u8cc7\u6599\u96c6\u4e2d\uff0c\u7e3d\u5171\u5305\u542b\u4e86 \u7684\u6548\u80fd\u5dee\u7570\u30022)\u6211\u5011\u6240\u63d0\u51fa\u7684\u968e\u5c64\u5f0f\u67b6\u69cb\u548c\u76ee\u524d\u5e7e\u500b\u6709\u540d\u7684\u5206\u985e\u65b9\u6cd5\u6bd4\u8f03\uff0c\u5176\u512a</td></tr><tr><td>\u8db3\u6216\u4e0d\u5b8c\u5168\uff0c\u4f7f\u5f97\u898f\u5247\u6216\u77e5\u8b58\u4e5f\u5c31\u76f8\u5c0d\u5730\u4e0d\u9f4a\u5168\uff0c\u56e0\u6b64\uff0c\u5c31\u7121\u6cd5\u5c0d\u6587\u4ef6\u505a\u5168\u76e4\u6027 \u4e00\u822c\u800c\u8a00\uff0c\u6587\u4ef6\u5927\u90e8\u4efd\u90fd\u662f\u4eba\u5011\u4ee5\u81ea\u7136\u8a9e\u8a00\u6240\u66f8\u5beb\u800c\u6210\u7684\uff0c\u9019\u4e9b\u6587\u4ef6\u4e2d\u7684\u6587 21578 \u7bc7 \u6587 \u4ef6 \uff0c \u5206 \u70ba \u4e94 \u5927 \u985e \u5225 (EXCHANGES, ORGS, PEOPLE, PLACES, \u52a3\u70ba\u4f55\uff1f</td></tr><tr><td>\u7684\u6a23\u672c\u6bd4\u5c0d\uff0c\u4ee5\u81f4\u65bc\u9020\u6210\u4e86\u5206\u985e\u4e0a\u7684\u56f0\u96e3\u3002 \u5b57\u6240\u8981\u8868\u9039\u7684\uff0c\u5247\u662f\u4eba\u5011\u7684\u60f3\u6cd5\u8207\u610f\u898b\u3002\u6211\u5011\u76f8\u4fe1\u5728\u9019\u4e9b\u60f3\u6cd5\u8207\u610f\u898b\u4e2d\uff0c\u4e3b\u8981\u662f TOPICS)\uff0c\u6211\u5011\u53ea\u62ff\u4e94\u5927\u985e\u5225\u4e2d\u7684 TOPICS \u985e\u5225\u505a\u70ba\u5be6\u9a57\u4e4b\u7528\u3002\u5728\u9019\u500b\u985e\u5225\u4e2d\uff0c \u5728\u672c\u5be6\u9a57\u4e2d\u6240\u4f7f\u7528\u7684\u8a55\u4f30\u65b9\u6cd5\uff0c\u70ba\u5728\u8cc7\u8a0a\u64f7\u53d6\u4e2d\u6700\u5e38\u88ab\u5927\u5bb6\u4f7f\u7528\u7684\u6b63\u78ba\u7387</td></tr><tr><td>\u6458\u8981 \u6458\u8981 \u6458\u8981 \u6458\u8981 \u5728\u672c\u7bc7\u8ad6\u6587\u4e2d\uff0c\u4e3b\u8981\u7684\u52d5\u6a5f\u5728\u65bc\u6539\u5584\u76ee\u524d\u6587\u4ef6\u5206\u985e\u7684\u65b9\u6cd5\uff0c\u6211\u5011\u4e0d\u4ee5\u95dc\u9375\u5b57 \u7531\u4e00\u4e9b\u91cd\u8981\u7684\u89c0\u5ff5\u6240\u7d44\u6210\u7684\uff0c\u800c\u6211\u5011\u8a8d\u70ba\u6587\u5b57\u4e2d\u7684\u540d\u8a5e\u5b57\u8a5e\u6700\u80fd\u8868\u9039\u4e00\u500b\u89c0\u5ff5\u7684 \u5305\u542b\u4e86 135 \u500b\u5b50\u985e\u5225\uff0c\u70ba\u4e86\u968e\u5c64\u5f0f\u6a21\u7d44\u7684\u8a13\u7df4\u53ca\u6e2c\u8a66\u7684\u9700\u8981\uff0c\u6211\u5011\u53ea\u9078\u64c7\u5305\u542b\u4e09 (precision)\u3001\u53ec\u56de\u7387(recall)\u548c F1 \u8a55\u4f30\u65b9\u6cd5\u3002</td></tr><tr><td>\u6587\u4ef6\u5206\u985e\u662f\u4e00\u9805\u6c7a\u5b9a\u4e00\u7bc7\u6587\u4ef6\u662f\u5426\u5c6c\u65bc\u4e00\u500b\u6216\u591a\u500b\u5df2\u4e8b\u5148\u5b9a\u7fa9\u597d\u7684\u985e\u5225\u4e4b \u7684\u5b58\u5728\u5426\u4f86\u6c7a\u5b9a\u4e00\u7bc7\u6587\u4ef6\u61c9\u5c6c\u65bc\u90a3\u4e00\u500b\u6216\u591a\u500b\u985e\u5225\u3002\u9032\u4e00\u6b65\u7684\uff0c\u6211\u5011\u63a1\u7528\u4ee5\u985e\u795e \u5f62\u6210\u3002\u56e0\u6b64\uff0c\u5728\u7279\u5fb5\u9078\u53d6\u904e\u7a0b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u4f7f\u7528\u4e86\u7531 Eric Brill [1993]\u6240\u63d0\u51fa\u7684\u8a5e \u7bc7\u6587\u4ef6\u4ee5\u4e0a\u7684\u5b50\u985e\u5225\u505a\u70ba\u6e2c\u8a66\u985e\u5225\u3002\u6700\u5f8c\uff0c\u6211\u5011\u4f7f\u7528\u4e86 96 \u500b\u5b50\u985e\u5225\u300110555 \u7bc7 \u8868\u683c\u4e00\u6240\u793a\uff0c\u662f\u6211\u5011\u6240\u63d0\u51fa\u7684\u968e\u5c64\u5f0f\u65b9\u6cd5\u548c\u6c92\u6709\u4f7f\u7528\u968e\u5c64\u67b6\u69cb\u7684\u65b9\u6cd5\u7684\u6bd4\u8f03</td></tr><tr><td>\u5de5\u4f5c\uff0c\u800c\u81ea\u52d5\u5316\u5206\u985e\u5247\u53ef\u4ee5\u6709\u6548\u5730\u5e6b\u52a9\u5206\u985e\u7684\u8655\u7406\u3002\u5728\u672c\u7bc7\u8ad6\u6587\u4e2d\uff0c\u6211\u5011\u63d0\u51fa\u4e86 \u7d93\u7db2\u8def\u70ba\u57fa\u790e\u7684\u968e\u5c64\u5f0f\u67b6\u69cb\u7684\u6a5f\u5668\u5b78\u7fd2\u7684\u65b9\u6cd5\u4f86\u6c7a\u5b9a\u6587\u4ef6\u7684\u6b78\u5c6c\u3002\u800c\u4e14\uff0c\u7d93\u7531\u9019 \u6027\u5206\u6790\u5668(part-of-speech tagger)\u70ba\u6bcf\u500b\u82f1\u6587\u5b57\u6a19\u793a\u5176\u8a5e\u6027\u8cc7\u8a0a\uff0c\u7136\u5f8c\u9078\u64c7\u540d\u8a5e\u96c6 \u6587\u4ef6\u4f5c\u70ba\u5be6\u9a57\u7528\u7684\u8cc7\u6599\u96c6\u3002 [Manevitz, 2000]\uff0c\u7531\u8868\u683c\u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u5f88\u6e05\u695a\u5730\u770b\u51fa\u4f86\uff0c\u6211\u5011\u6240\u63d0\u51fa\u7684\u968e\u5c64\u5f0f\u65b9</td></tr><tr><td>\u4e00\u500b\u4ee5\u968e\u5c64\u6df7\u5408\u5f0f\u7684\u5c08\u5bb6\u6a21\u7d44(hierarchical mixture of experts model)\u70ba\u57fa\u790e\u7684\u6587 \u6a23\u5b78\u7fd2\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u4f7f\u6587\u4ef6\u5206\u985e\u7cfb\u7d71\u66f4\u5bb9\u6613\u5730\u61c9\u7528\u5230\u5176\u4ed6\u7684\u9818\u57df\u3002 \u5408\u7684\u95dc\u9375\u5b57\u8a5e\u3002\u63a5\u4e0b\u4f86\u5247\u5fc5\u9808\u4f7f\u7528 stop word \u904e\u6ffe\u5668\u6a21\u7d44\uff0c\u5c07\u4e0a\u8ff0\u6240\u9078\u53d6\u6a19\u793a\u540d \u5c0d\u65bc 96 \u500b\u5b50\u985e\u5225\u7684\u968e\u5c64\u67b6\u69cb\uff0c\u6211\u5011\u4f7f\u7528\u4e86 [\u9673\u5f65\u5448, 2000] \u6240\u63d0\u51fa\u7684\u67b6\u69cb \u6cd5\uff0c\u5927\u5927\u5730\u63d0\u6607\u4e86\u5206\u985e\u7684\u6b63\u78ba\u6027\u3002</td></tr><tr><td>\u4ef6\u5206\u985e\u65b9\u6cd5\u3002\u9019\u500b\u6a21\u7d44\u4f7f\u7528\u4e86\u5206\u5272-\u514b\u670d\u539f\u7406(divide-and-conquer principle)\uff0c\u5728 \u672c\u7bc7\u8ad6\u6587\u9664\u4e86\u7dd2\u8ad6\u5916\uff0c\u7b2c\u4e8c\u7bc0\u5c07\u4ecb\u7d39\u6211\u5011\u6240\u63d0\u7684\u968e\u5c64\u5f0f\u6a21\u7d44\uff0c\u7b2c\u4e09\u7bc0\u5c07\u4ecb\u7d39 \u8a5e\u7684\u95dc\u5efa\u5b57\u8a5e\u4e2d\uff0c\u904e\u6ffe\u4e00\u4e9b\u4e0d\u8db3\u4ee5\u4ee3\u8868\u6587\u4ef6\u672c\u8eab\u7279\u6027\u5b57\u8a5e\uff0c\u4ee5\u907f\u514d\u5728\u63a5\u4e0b\u4f86\u7684\u8655 \u5716\uff0c\u5176\u67b6\u69cb\u5982\u5716\u4e09\u3002\u5b83\u57fa\u672c\u7684\u5efa\u69cb\u6982\u5ff5\u662f\u4f9d\u64da\u6587\u4ef6\u5728\u5404\u985e\u5225\u4e4b\u9593\u7684\u5206\u4f48\u4f86\u5206\u6790\u985e</td></tr><tr><td>\u4e00\u500b\u4e8b\u5148\u5b9a\u7fa9\u597d\u7684\u968e\u5c64\u67b6\u69cb\u4e0b\u5b9a\u7fa9\u8f03\u5c0f\u7684\u5206\u985e\u554f\u984c\uff0c\u800c\u6700\u5f8c\u7684\u5206\u985e\u5668\u5247\u662f\u4f7f\u7528\u985e \u7279\u5fb5\u53ca\u8a13\u7df4\u6a23\u672c\u96c6\u7684\u9078\u53d6\uff0c\u7b2c\u56db\u7bc0\u5247\u91dd\u5c0d\u6211\u5011\u6240\u4f7f\u7528\u7684\u8def\u900f\u793e\u65b0\u805e\u6027\u8cc7\u6599\u96c6\u6240\u505a \u7406\u904e\u7a0b\u4e2d\uff0c\u5f15\u5165\u592a\u591a\u4e0d\u5fc5\u8981\u7684\u96dc\u8a0a(noise)\u3002\u5728\u505a\u5b8c stop word \u7684\u8655\u7406\u5f8c\uff0c\u5176\u4ed6\u5269 \u5225\u9593\u7684\u95dc\u9023\u6027\u6240\u5efa\u7acb\u8d77\u4f86\u7684\u3002 \u8868\u683c\u4e00 \u4f7f\u7528\u968e\u5c64\u5f0f\u67b6\u69cb V.S. \u6c92\u6709\u4f7f\u7528\u968e\u5c64\u5f0f\u67b6\u69cb\u7684\u5e73\u5747\u6548\u80fd\u6bd4\u8f03</td></tr><tr><td>\u795e\u7d93\u7db2\u8def\u4e2d\u7684\u5012\u50b3\u905e\u7db2\u8def\u4f86\u5b8c\u6210\u5206\u985e\u6a5f\u5236\u3002\u53e6\u5916\uff0c\u5728\u7279\u5fb5\u9078\u53d6(feature selection) \u7684\u4e00\u4e9b\u81ea\u52d5\u5316\u6587\u4ef6\u5206\u985e\u5be6\u9a57\u7684\u7d50\u679c\u8207\u5206\u6790\u3002\u6700\u5f8c\uff0c\u6211\u5011\u70ba\u672c\u7bc7\u8ad6\u6587\u63d0\u51fa\u7e3d\u7d50\u3002 \u4e0b\u7684\u540d\u8a5e\u5b57\u96c6\u9084\u4e0d\u80fd\u7b97\u662f\u6700\u5f8c\u60f3\u8981\u7684\u7279\u5fb5\u96c6\u3002\u56e0\u70ba\u6839\u64da\u4eba\u5011\u7684\u5beb\u4f5c\u7fd2\u6163\uff0c\u5c0d\u65bc\u90a3</td></tr><tr><td>\u4e0a \uff0c \u6211 \u5011 \u4e5f \u505a \u4e86 \u4e00 \u4e9b \u6709 \u5225 \u65bc \u50b3 \u7d71 \u65b9 \u6cd5 \u7684 \u6539 \u8b8a \u3002 \u6700 \u5f8c \uff0c \u6211 \u5011 \u4ee5 \u90e8 \u4efd \u8def \u900f \u793e \u4e9b\u51fa\u73fe\u983b\u7387\u592a\u904e\u65bc\u983b\u7e41\u6216\u904e\u65bc\u8ca7\u4e4f\u7684\u5b57\uff0c\u901a\u5e38\u90fd\u6c92\u6709\u592a\u5927\u7684\u7fa9\u610f\u53ca\u91cd\u8981\u6027\uff0c\u5c0d\u65bc</td></tr><tr><td>(Reuters-21578)\u7684\u65b0\u805e\u6027\u6587\u4ef6\u505a\u70ba\u6e2c\u8a66\u8cc7\u6599\uff0c\u5be6\u9a57\u7d50\u679c\u986f\u793a\u6211\u5011\u6240\u63d0\u51fa\u7684\u65b9\u6cd5\u80fd 2. \u968e\u5c64\u5f0f\u6a21\u7d44 \u968e\u5c64\u5f0f\u6a21\u7d44 \u968e\u5c64\u5f0f\u6a21\u7d44 \u968e\u5c64\u5f0f\u6a21\u7d44 \u5716\u4e8c \u672c\u8ad6\u6587\u6240\u63d0\u51fa\u4e4b\u968e\u5c64\u67b6\u69cb\u5716 \u7b26\u5408\u9019\u5169\u7a2e\u60c5\u5f62\u7684\u5b57\u96c6\uff0c\u6211\u5011\u53ef\u4ee5\u7d93\u7531\u5b57\u8a5e\u983b\u7387-\u53cd\u6587\u4ef6\u983b\u7387(term frequency and</td></tr><tr><td>\u6709\u6548\u5730\u6539\u5584\u6587\u4ef6\u5206\u985e\u7684\u6b63\u78ba\u7387\u3002 \u5716\u4e00\u6240\u793a\uff0c\u662f\u6211\u5011\u6240\u63d0\u51fa\u7684\u81ea\u52d5\u5316\u6587\u4ef6\u5206\u985e\u7684\u5b8c\u6574\u6a21\u7d44\u3002\u4e00\u500b\u6587\u4ef6\u5206\u985e\u7cfb\u7d71 \u5716\u4e00 \u672c\u8ad6\u6587\u6240\u63d0\u51fa\u4e4b\u81ea\u52d5\u5316\u6587\u4ef6\u5206\u985e\u6a21\u7d44 inverse document frequency , TFIDF)\u7684\u5206\u6790\u800c\u5c07\u5176\u904e\u6ffe\u6389\uff0c\u5982\u6b64\u8655\u7406\u5f8c\u6240\u5269\u4e0b\u7684</td></tr><tr><td>(text categorization system)\u7684\u4e3b\u8981\u5de5\u4f5c\u6d41\u7a0b\uff0c\u662f\u5148\u7528\u4e00\u7d44\u8a13\u7df4\u6a23\u672c\u96c6\u4f86\u8a13\u7df4\u7cfb\u7d71 \u5728\u6211\u5011\u7684\u6a21\u578b\u4e2d\uff0c\u6bcf\u500b\u9598\u9580\u6240\u8868\u793a\u7684\u662f\u4e00\u4efd\u6587\u4ef6\u7684\u4e00\u822c\u6982\u5ff5\uff0c\u5047\u5982\u6587\u4ef6\u4e2d\u5305 \u90e8\u4efd\uff0c\u6211\u5011\u7a31\u4e4b\u70ba\u7279\u5fb5\u5b57\u8a5e(feature words)\uff0c\u9019\u4e9b\u5b57\u8a5e\u624d\u662f\u6700\u91cd\u8981\u7684\u7cbe\u83ef\u3002</td></tr><tr><td>1. \u7dd2\u8ad6 \u7dd2\u8ad6 \u7dd2\u8ad6 \u7dd2\u8ad6 \u4e2d\u7684\u6587\u4ef6\u5206\u985e\u5668\uff1b\u7136\u5f8c\u518d\u85c9\u7531\u5df2\u8a13\u7df4\u597d\u7684\u5206\u985e\u5668\u5c0d\u6e2c\u8a66\u6a23\u672c\u4e2d\u7684\u65b0\u6587\u4ef6\u505a\u81ea\u52d5\u5316 \u5728\u5716\u4e00\u7528\u865b\u7dda\u65b9\u584a\u6240\u570d\u6210\u7684\uff0c\u5c31\u662f\u6211\u5011\u6240\u63d0\u51fa\u7684\u968e\u5c64\u5f0f\u985e\u795e\u7d93\u7db2\u8def\u6a21\u7d44\uff0c\u5176 \u542b\u8457\u6240\u8868\u793a\u7684\u6982\u5ff5\uff0c\u5247\u7db2\u8def\u7684\u8f38\u51fa\u662f 1\uff0c\u5426\u5247\u70ba 0\u3002\u800c\u5c08\u5bb6\u6240\u8868\u793a\u7684\u662f\u7279\u5b9a\u7684\u985e \u6b64\u5916\uff0c\u5728\u8a13\u7df4\u5206\u985e\u5668\u65b9\u9762\uff0c\u5c0d\u65bc\u540c\u4e00\u985e\u5225\u7684\u6b63\u8ca0\u8a13\u7df4\u6a23\u672c\u9078\u53d6\u4e0a\uff0c\u82e5\u5169\u8005\u7684</td></tr><tr><td>\u8fd1\u5e7e\u5e74\u4f86\uff0c\u96a8\u8457\u7db2\u8def\u6280\u8853\u4e0d\u65b7\u5730\u9032\u6b65\uff0c\u6709\u7528\u7684\u8cc7\u8a0a\u4e5f\u76f8\u5c0d\u5730\u5927\u91cf\u6210\u9577\u4e2d\u3002\u96d6 \u5206\u985e\u7684\u52d5\u4f5c\u3002\u5728\u5716\u4e00\u7684\u5be6\u7dda\u7bad\u982d\u90e8\u4efd\u662f\u6574\u500b\u6587\u4ef6\u5206\u985e\u7684\u8a73\u7d30\u8a13\u7df4\u904e\u7a0b\uff0c\u9996\u5148\u6c7a\u5b9a \u8a73\u7d30\u7684\u67b6\u69cb\u5982\u5716\u4e8c\uff0c\u6b64\u6a21\u7d44\u7684\u4e3b\u8981\u7684\u9748\u611f\u662f\u4f86\u81ea\u65bc Jordan \u548c Jacobs[1993]\u6240\u63d0\u51fa \u5225[Ruiz, 1999]\u3002\u6240\u6709\u7684\u6587\u4ef6\u90fd\u4ee5\u5411\u91cf\u8868\u793a\u4e4b\u3002\u6574\u500b\u5206\u985e\u5de5\u4f5c\u662f\u7531\u6839\u7bc0\u9ede(root node) \u9078\u53d6\u5dee\u8ddd\u904e\u5927\uff0c\u9020\u6210\u904e\u5ea6\u5730\u4e0d\u5e73\u5747\uff0c\u5f88\u6709\u53ef\u80fd\u6703\u9020\u6210\u5206\u985e\u5668\u5728\u5b78\u7fd2\u4e0a\u7684\u8aa4\u5dee\uff0c\u4ee5</td></tr><tr><td>\u7136\u7db2\u8def\u4e0a\u8209\u624b\u53ef\u5f97\u7684\u8cc7\u8a0a\u65b9\u4fbf\u4eba\u5011\u5c0d\u8cc7\u8a0a\u7684\u53d6\u5f97\u8207\u50b3\u905e\uff0c\u4f46\u662f\u7576\u7db2\u8def\u8cc7\u8a0a\u91cf\u6108\u4f86 \u4e00\u7d44\u5df2\u7531\u5c08\u5bb6\u5206\u985e\u597d\u7684\u6a23\u672c\u96c6\uff0c\u5f9e\u6b64\u6a23\u672c\u96c6\u4e2d\uff0c\u7d93\u904e\u4e00\u9023\u4e32\u7684\u524d\u8655\u7406\u7a0b\u5e8f\u5f8c\uff0c\u9078 \u958b\u59cb\uff0c\u5047\u5982\u9598\u9580\u7684\u8f38\u51fa\u503c\u70ba\u771f\uff0c\u5247\u7b2c\u4e8c\u5c64\u7684\u7bc0\u9ede\u90fd\u6703\u88ab\u555f\u52d5\uff0c\u5982\u6b64\u7684\u7a0b\u5e8f\u6301\u7e8c\u81f3 \u7684\u968e\u5c64\u5f0f\u6df7\u5408\u7684\u5c08\u5bb6\u6a21\u578b(hierarchical mixture of experts , HME model)\u3002HME \u6a21 \u81f4\u65bc\u9020\u6210\u6700\u5f8c\u5206\u985e\u4e0a\u7684\u932f\u8aa4\u3002\u56e0\u6b64\uff0c\u5c0d\u65bc\u8a13\u7df4\u6a23\u672c\u7684\u9078\u53d6\u4e5f\u662f\u4e0d\u53ef\u5ffd\u8996\u7684\u5de5\u4f5c\u4e4b</td></tr><tr><td>\u6108\u5927\u6642\uff0c\u5982\u4f55\u6709\u6548\u3001\u4e14\u5feb\u901f\u5730\u53d6\u5f97\u6709\u7528\u7684\u8cc7\u8a0a\uff0c\u4fbf\u6210\u70ba\u975e\u5e38\u91cd\u8981\u7684\u4e8b\u60c5\u3002\u6b64\u6642\uff0c \u64c7\u4e00\u7d44\u6700\u80fd\u4ee3\u8868\u53ca\u8b58\u5225(identification)\u6b64\u985e\u5225\u7684\u7279\u5fb5\u96c6(feature set)\u3002\u4e26\u4ee5\u5411\u91cf\u65b9\u5f0f \u5f0f\u662f\u4ee5\u5206\u5272-\u514b\u670d\u539f\u7406(divide-and-conquer principle)\u70ba\u57fa\u790e\uff0c\u5176\u4e3b\u8981\u7684\u60f3\u6cd5\u662f\u5c07\u4e00 \u5b83\u5230\u9054\u4e00\u500b\u6a39\u8449\u7bc0\u9ede\u3002 \u4e00\u3002\u5728\u9019\u4e00\u65b9\u9762\uff0c\u6211\u5011\u63a1\u7528\u4e86\u7531 Ruiz [1999]\u6240\u63d0\u51fa\u7684\u2033\u985e\u5225\u5340(category zone)\u2033\u7684</td></tr><tr><td>\u6587\u4ef6\u5206\u985e(text categorization)\u6280\u8853\uff0c\u5373\u900f\u904e\u6f14\u7b97\u6cd5\u5206\u6790\u4e00\u96fb\u5b50\u6587\u4ef6\u5f8c\uff0c\u5c07\u5176\u5206\u914d \u8868\u793a\u4e4b\uff0c\u5982\u6b64\u5c31\u53ef\u5f97\u5230\u4e00\u500b\u4ee5\u7279\u5fb5\u5411\u91cf\u8868\u793a\u7684\u6a23\u672c\u7d44\uff0c\u800c\u5728\u968e\u5c64\u5f0f\u985e\u795e\u7d93\u7db2\u8def\u6a21 \u500b\u5927\u554f\u984c\u5206\u5272\u6210\u82e5\u5e72\u500b\u5bb9\u6613\u89e3\u6c7a\u7684\u5c0f\u554f\u984c\uff0c\u7136\u5f8c\u518d\u7d50\u5408\u9019\u4e9b\u5c0f\u554f\u984c\u7684\u89e3\u7b54\uff0c\u4ee5\u5f97 \u5c0d\u65bc\u9598\u9580\u548c\u5c08\u5bb6\u7db2\u8def\uff0c\u7531\u65bc\u985e\u795e\u7d93\u7db2\u8def\u4e2d\u7684\u5012\u50b3\u905e\u7db2\u8def(back-propagation , \u6982\u5ff5\u4f86\u9078\u53d6\u8a13\u7df4\u6a23\u672c\u96c6\uff0c\u5176\u57fa\u672c\u505a\u6cd5\u70ba\u9078\u53d6\u5c6c\u65bc\u6b64\u985e\u5225\u7684\u6587\u4ef6\u70ba\u6b63\u6a23\u672c\uff0c\u800c\u9078\u53d6 \u8868\u683c\u4e8c\u6240\u793a\uff0c\u5247\u662f\u6211\u5011\u6240\u63d0\u51fa\u7684\u65b9\u6cd5\u548c\u5169\u500b\u8457\u540d\u7684\u5206\u985e\u65b9\u6cd5\u7684\u6bd4\u8f03-\u6c7a\u7b56\u6a39</td></tr><tr><td>(assign)\u7d66\u4e00\u6216\u591a\u500b\u985e\u5225(categories)\uff0c\u4fbf\u626e\u6f14\u8457\u5176\u4e2d\u91cd\u8981\u7684\u89d2\u8272\u3002 \u7d44\u4e2d\uff0c\u4e3b\u8981\u662f\u5e0c\u671b\u80fd\u900f\u904e\u6bcf\u4e00\u500b\u6a23\u672c\u7d44\u4f86\u8a13\u7df4\u5176\u6240\u5c6c\u7684\u5206\u985e\u5668\uff0c\u4f7f\u5176\u80fd\u5f88\u6b63\u78ba\u5730 \u5230\u4e00\u822c\u5316\u7684\u89e3\u7b54\u3002\u800c\u5728\u5206\u985e\u4e00\u500b\u6e1b\u5c11\u7bc4\u570d\u4e0a(reduced domain)\uff0cHME \u6a21\u578b\u662f\u7d93\u7531 BP Network)\u5177\u6709\u5b78\u7fd2\u6b63\u78ba\u7387\u9ad8\u3001\u7406\u8ad6\u7c21\u660e[Zurada, 1992]\u3002\u56e0\u6b64\uff0c\u6211\u5011\u6c7a\u5b9a\u4f7f\u7528 \u6700\u9760\u8fd1\u6b64\u985e\u5225\u3001\u537b\u4e0d\u5c6c\u65bc\u6b64\u985e\u5225\u7684\u6587\u4ef6\u505a\u70ba\u8ca0\u6a23\u672c\u3002\u9019\u6a23\u7684\u6982\u5ff5\uff0c\u6700\u65e9\u662f\u4f86\u81ea\u65bc (decision tree)</td></tr><tr><td>\u50b3\u7d71\u7684\u6587\u4ef6\u5206\u985e\u5de5\u4f5c\u90fd\u662f\u7531\u67d0\u500b\u9818\u57df\u7684\u4eba\u985e\u5c08\u5bb6(human experts in domain) \u5c07\u6bcf\u4e00\u500b\u6a23\u672c\u5206\u5230\u6b63\u78ba\u7684\u985e\u5225\u53bb\u3002\u7d93\u904e\u4e00\u9023\u4e32\u7684\u53cd\u8986\u5b78\u7fd2\u5f8c\uff0c\u6211\u5011\u5f97\u5230\u4e00\u7d44\u5df2\u8a13 \u5c07\u8f38\u5165\u7a7a\u9593(input space)\u5283\u5206\u6210\u4e00\u5de2\u72c0\u3001\u9806\u5e8f\u7684\u5340\u57df\uff0c\u7136\u5f8c\u8a13\u7df4\u7279\u5b9a\u7684\u8f03\u5c0f\u5206\u985e \u4e09\u5c64\u7684\u5012\u50b3\u905e\u985e\u795e\u7d93\u7db2\u8def\uff0c\u5176\u8f38\u5165\u5c64\u5305\u542b\u4e86 N \u500b\u7279\u5fb5\uff0c\u96b1\u85cf\u5c64\u5305\u542b\u4e86(2N/3)\u500b\u7bc0 Singhal \u7b49\u4eba[1997]\u70ba\u6587\u4ef6\u7e5e\u9001(text routing)\u6240\u63d0\u51fa\u4f86\u7684\u60f3\u6cd5\u3002</td></tr><tr><td>\u6240\u5b8c\u6210\u3002\u4f46\u662f\uff0c\u96a8\u8457\u6587\u4ef6\u6578\u91cf\u5feb\u901f\u5730\u6210\u9577\uff0c\u5c0d\u65bc\u5c08\u5bb6\u800c\u8a00\uff0c\u9019\u6a23\u7684\u5de5\u4f5c\u5c31\u8b8a\u5f97\u66f4 \u56f0\u96e3\u4e86\u3002\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u6587\u4ef6\u7684\u81ea\u52d5\u5206\u985e\u5c31\u986f\u5f97\u66f4\u52a0\u91cd\u8981\u4e86\u3002 \u5668\uff0c\u4ee5\u6b64\u6c42\u5f97\u4e00\u500b\u5206\u985e\u554f\u984c\u7684\u7b54\u6848\u3002HME \u6a21\u578b\u5305\u542b\u5169\u500b\u57fa\u672c\u7684\u5143\u4ef6\uff1a\u9598\u9580\u7db2\u8def \u9ede\uff0c\u800c\u8f38\u51fa\u5c64\u70ba\u55ae\u4e00\u500b\u7bc0\u9ede\u3002\u800c\u5728\u795e\u7d93\u5143\u7684\u67b6\u69cb\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 S \u5f62\u51fd\u6578(sigmoid \u7df4\u597d\u3001\u5177\u6709\u76f8\u7576\u8fa8\u8b58\u7a0b\u5ea6\u7684\u5206\u985e\u5668\uff0c\u4ee5\u4f9b\u6e2c\u8a66\u968e\u6bb5\u6642\u4f7f\u7528\u3002 (gating networks)\u548c\u5c08\u5bb6\u7db2\u8def(expert networks)\u3002\u9019\u4e9b\u5143\u4ef6\u7684\u7d50\u69cb\u985e\u4f3c\u65bc\u6a39\u72c0\u7d50\u69cb function)\u4f5c\u70ba\u8f49\u63db\u51fd\u6578\u3002\u6b64\u51fd\u6578\u5177\u6709\u5fae\u5206\u5bb9\u6613\u7684\u512a\u9ede\uff0c\u53ef\u914d\u5408\u964d\u68af\u5ea6\u6cd5\u5247\u4f86\u8abf\u6574 \u5716\u4e09 \u5728 TOPICS \u4e2d\uff0c96 \u500b\u5b50\u985e\u5225\u7684\u968e\u5c64\u5f0f\u67b6\u69cb\u5716</td></tr></table>", |
| "html": null, |
| "type_str": "table", |
| "num": null |
| } |
| } |
| } |
| } |
