| { | |
| "paper_id": "O04-1022", | |
| "header": { | |
| "generated_with": "S2ORC 1.0.0", | |
| "date_generated": "2023-01-19T08:00:52.959187Z" | |
| }, | |
| "title": "Using Relevance Feedback in Bayesian Probabilistic Mixture Retrieval Model", | |
| "authors": [ | |
| { | |
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| { | |
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| "identifiers": {}, | |
| "abstract": "", | |
| "pdf_parse": { | |
| "paper_id": "O04-1022", | |
| "_pdf_hash": "", | |
| "abstract": [], | |
| "body_text": [ | |
| { | |
| "text": "\u4f9b \u5c11 \u4e00 \u9ede \u7684 \u8cc7 \u8a0a \uff0c \u90a3 \u9ebc \u5728 \u4e0b \u4e00 \u6b21 \u905e \u8ff4 \u7684 \u6aa2 \u7d22 \u4e2d \uff0c \u4fbf \u80fd \u6e1b \u5c11 \u4e00 \u4e9b \u6587 \u4ef6 \u8207 \u6587 \u4ef6 \u4e4b \u9593 \u6df7 \u6dc6 \u7684 \u7a0b \u5ea6 \uff0c \u800c \u9054 \u6210 \u6709 \u6548 \u7684 \u81ea \u52d5 \u6aa2 \u7d22 \u904e \u7a0b \uff1b \u6b64 \u5916 \u5728 \u4e00 \u4e9b \u6aa2 \u7d22 \u7cfb \u7d71 \u4e0a \u6703 \u7528 \u5230 \u7684 \u67e5 \u8a62 \u8a5e \u6b0a \u91cd \u7684 \u89c0 \u5ff5 \u82e5 \u80fd \u5f15 \u9032 \u4f86 \uff0c \u5c07 \u9019 \u4e9b \u53c3 \u6578 \u984d \u5916 \u5730 \u52a0 \u5230 \u6df7 \u5408 \u5f0f n-gram \u6aa2 \u7d22 \u67b6 \u69cb \u4e2d \u8f14 \u52a9 \u539f \u672c \u7684 \u8a9e \u8a00 \u6a21 \u578b \u8a08 \u7b97 \u5206 \u6578 \uff0c \u4e26 \u5229 \u7528 \u56de \u994b \u7684 \u8cc7 \u8a0a \u53bb \u91cd \u8abf \u6574 \u6b0a \u91cd \uff0c \u5982 \u6b64 \u61c9 \u53ef \u52a0 \u5f37 \u4e00 \u4e9b \u91cd \u8981 \u5b57 \u7684 \u5206 \u6578 \u4ee5 \u63d0 \u6607 \u6aa2 \u7d22 \u6548 \u80fd \u3002 \u6240 \u4ee5 \u6211 \u5011 \u4ee5 \u6df7 \u5408 \u5f0f \u6a5f \u7387 \u6aa2 \u7d22 \u67b6 \u69cb \u70ba \u4e3b \uff0c \u65bc \u6b64 \u67b6 \u69cb \u4e0a \u4f7f \u7528 \u76f8 \u95dc \u8cc7 \u8a0a \u56de \u994b \u3002 \u9664 \u4e86 \u6cbf \u7528 \u5148 \u524d \u7684 \u67e5 \u8a62 \u53e5 \u64f4 \u5145 \u65b9 \u5f0f \u5916 \uff0c \u6211 \u5011 \u5617 \u8a66 \u5728 \u6aa2 \u7d22 \u5f0f \u4e2d \u91dd \u5c0d \u6bcf \u500b \u67e5 \u8a62 \u8a5e \u52a0 \u5165 \u6b0a \u91cd \u7684 \u53c3 \u6578 \uff0c \u5c07 \u524d \u4e00 \u6b21 \u905e \u8ff4 \u6aa2 \u7d22 \u5206 \u6578 \u6700 \u9ad8 \u7684 N \u7bc7 \u6587 \u4ef6 \u53bb \u505a \u67e5 \u8a62 \u8a5e \u7684 \u6b0a \u91cd \u91cd \u8abf \u6574 \uff0c \u671f \u671b \u4ee5 \u9019 N \u7bc7 \u6587 \u4ef6 \u5167 \u7684 \u5206 \u5e03 \u60c5 \u5f62 \uff0c \u53bb \u8abf \u6574 \u51fa \u6bcf \u500b \u67e5 \u8a62 \u8a5e \u7684 \u91cd \u8981 \u7a0b \u5ea6 \uff0c \u6b64 \u5916 \uff0c \u91dd \u5c0d \u6587 \u4ef6 \u5167 \u63d0 \u4f9b \u8cc7 \u8a0a \u904e \u5c11 \u7684 \u554f \u984c \uff0c \u6211 \u5011 \u4f7f \u7528 \u6700 \u4f73 \u4e8b \u5f8c \u6a5f \u7387 ( Maximum a Posteriori)\u6cd5\u5247\u5c07\u9019 N \u7bc7 \u6587 \u4ef6 \u548c \u8cc7 \u6599 \u5eab \u88e1 \u7684 \u6bcf \u4e00 \u4efd \u6587 \u4ef6 \u8abf \u6210 \u65b0 \u7684 \u6587 \u4ef6 \u6df7 \u5408 \u8a9e \u8a00 \u6a21 \u578b \uff0c \u5229 \u7528 \u9019 N \u7bc7 \u6587 \u4ef6 \u6a21 \u578b \u9069 \u7576 \u7684 \u88dc \u5145 \u8cc7 \u8a0a \u4e88 \u8cc7 \u6599 \u5eab \u5167 \u7684 \u6587 \u4ef6 \u3002 2. \u76f8\u95dc\u7814\u7a76 2.1 \u76f8 \u95dc \u8cc7 \u8a0a \u56de \u994b \u4f7f \u7528 \u8005 \u63d0 \u4f9b \u7d66 \u6aa2 \u7d22 \u7cfb \u7d71 \u7684 \u67e5 \u8a62 \u53e5 \u4e2d \uff0c \u901a \u5e38 \u53e5 \u5b50 \u7684 \u9577 \u5ea6 \u90fd \u504f \u77ed \uff0c \u5982 \u6b64 \u80fd \u63d0 \u4f9b \u4e4b \u8cc7 \u8a0a \u4fbf \u76f8 \u5c0d \u7684 \u6e1b \u5c11 \uff0c \u5bb9 \u6613 \u9020 \u6210 \u6aa2 \u7d22 \u6642 \u7522 \u751f \u6df7 \u6dc6 \u7684 \u60c5 \u6cc1 [3]\u3002\u70ba\u4e86\u6b64\u985e\u554f\u984c\u7684\u89e3\u6c7a\uff0c\u6709\u5f88\u591a\u7814\u7a76\u671d\u8457\u4e0a\u4e0b\u6587\u5206\u6790\uff0c\u8a9e\u610f\u5206\u6790\u7b49\u81ea\u7136\u8a9e\u8a00\u8655\u7406\u4ee5\u53ca \u6587 \u4ef6 \u5167 \u5bb9 \u6a19 \u8a18 \u7684 \u5b9a \u7fa9 \uff0c \u5982 XML \u4e0a \u4f86 \u767c \u5c55 \u3002 \u800c \u5229 \u7528 \u524d \u4e00 \u6b21 \u6aa2 \u7d22 \u6240 \u7372 \u5f97 \u4e4b \u76f8 \u95dc \u6587 \u4ef6 \u4f86 \u8abf \u6574 \u67e5 \u8a62 \u53e5 \uff0c \u5c0d \u65bc \u6aa2 \u7d22 \u6548 \u679c \u4e5f \u6709 \u76f8 \u7576 \u7a0b \u5ea6 \u4e4b \u6539 \u5584", | |
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| "section": "", | |
| "sec_num": null | |
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| { | |
| "text": "\u6240 \u793a \uff1a \u5716 \u4e00 \u3001 \u67e5 \u8a62 \u53e5 \u64f4 \u5145 \u67b6 \u69cb \u5716 \u67e5 \u8a62 \u8a5e \u7684 \u6b0a \u91cd \u8abf \u6574 \u4ee5 \u524d \u4e00 \u56de \u6aa2 \u7d22 \u6392 \u540d \u8f03 \u9ad8 \u4e4b \u6578 \u7bc7 \u6587 \u4ef6 \u88e1 \u9762 \u7684 \u8a5e \u5206 \u5e03 \u60c5 \u5f62 \u70ba \u4f9d \u64da \uff0c \u70ba \u4e86 \u5f37 \u8abf \u67d0 \u4e9b \u5e38 \u51fa \u73fe \u7684 \u8a5e \u800c \u8a2d \u8a08 \u7684 \u8a08 \u7b97 \u5f0f \uff0c \u4ee5 \u4fbf \u5728 \u5411 \u91cf \u7b49 \u6aa2 \u7d22 \u6a21 \u578b \u7684 \u8868 \u73fe \u4e2d \u6703 \u66f4 \u8da8 \u8fd1 \u540c \u4e3b \u984c \u6587 \u4ef6 \u3002 \u67b6 \u69cb \u5982 \u4e0b \u5716 \u6240 \u793a \uff1a \u5716 \u4e8c \u3001 \u67e5 \u8a62 \u8a5e \u6b0a \u91cd \u91cd \u8abf \u6574 \u67b6 \u69cb \u5716 \u76f8 \u5c0d \u65bc \u67e5 \u8a62 \u8a5e q \u6709 \u4e00 \u500b \u5c0d \u61c9 \u7684 \u6b0a \u91cd w\uff0c\u7d93\u904e\u67e5\u8a62\u53e5\u64f4\u5145\u53ca\u6b0a\u91cd\u4e4b\u8abf\u6574\u5f8c\uff0c\u9664\u4e86\u65b0\u589e\u8a5e\u65bc\u67e5\u8a62\u53e5\u4e4b\u5916\uff0c\u539f\u672c\u7684\u6b0a \u91cd \u4e5f \u88ab \u66f4 \u65b0 \u904e \u4e86 \u3002 2.2 \u5411 \u91cf \u6aa2 \u7d22 \u6a21 \u578b \u4e4b \u8cc7 \u8a0a \u56de \u994b \u4ee5 \u5411 \u91cf \u6aa2 \u7d22 \u6a21 \u578b \u800c \u8a00 \uff0c \u91dd \u5c0d \u67e5 \u8a62 \u53e5 Q \u548c \u6587 \u4ef6 d\uff0c\u5229\u7528\u6bcf\u500b\u5b57\u7684\u51fa\u73fe\u6b21\u6578\u4ee5\u53ca\u5728\u6587\u4ef6\u9593\u5206\u5e03\u7684\u60c5\u5f62\u53bb\u7b97\u51fa\u7279 \u5fb5 \u5411 \u91cf q \u548c d\uff0c\u8a08\u7b97\u67e5\u8a62\u53e5\u548c\u6587\u4ef6\u7684\u76f8\u4f3c\u5ea6\u4ee5\u5167\u7a4d(Inner Product)\u904b\u7b97\u70ba\u4e3b\uff0c\u5728\u6b64\u60c5\u5f62\u4e0b\uff0c\u56de\u994b\u8cc7\u8a0a\u5fc5\u7136\u4ee5\u5411 \u91cf \u7684 \u578b \u614b \u53bb \u8abf \u6574 \u67e5 \u8a62 \u53e5 \u7684 \u5411 \u91cf \u5f9e q \u5230 q \uff0c \u76ee \u524d \u5e38 \u898b \u4e4b \u5411 \u91cf \u578b \u614b \u7684 \u8cc7 \u8a0a \u56de \u994b \u7565 \u8209 \u5169 \u4f8b [8]\uff1a Rocchio\uff1a \u2211 \u2211 \u2208 \u2208 \u2212 + = U j V i j i U V d d d d q q \u03b3 \u03b2 (1) Ide dec-hi\uff1a j U V i i i d d q q d d \u2208 \u2208 \u2212 + = \u2211 max (2) \u03b2 \u548c \u03b3 \u662f \u7d93 \u5be6 \u9a57 \u6240 \u627e \u51fa \u7684 \u7d93 \u9a57 \u503c \uff0c V \u662f \u6307 \u548c \u67e5 \u8a62 \u53e5 Q \u76f8 \u95dc \u7684 \u6587 \u4ef6 \u7fa4 \uff0c U \u662f \u6307 \u548c \u67e5 \u8a62 \u53e5 Q \u4e0d \u76f8 \u95dc \u7684 \u6587 \u4ef6 \u7fa4 \uff0c \u5176 \u65b9 \u6cd5 \u662f \u5229 \u7528 \u627e \u51fa \u76f8 \u95dc \u8207 \u4e0d \u76f8 \u95dc \u7684 \u6587 \u4ef6 \u7fa4 \u4f86 \u6539 \u5584 \u67e5 \u8a62 \u53e5 \u5411 \u91cf q\uff0c\u4ee5\u63d0\u6607\u4e0b\u4e00\u6b21\u905e\u8ff4\u7684\u6aa2\u7d22\u6548\u80fd\u3002 3. \u4f7f\u7528\u76f8\u95dc\u8cc7\u8a0a\u56de\u994b\u65bc\u8c9d\u6c0f\u6df7\u5408\u5f0f\u6a5f\u7387\u6aa2\u7d22 3.1 N-gram \u6a21 \u578b \u7684 \u5efa \u7acb N-gram[6]\u6a21\u578b\u5728\u81ea\u7136\u8a9e\u8a00\u8655\u7406\u4e2d\u662f\u5e38\u898b\u7684\u6280\u8853\uff0c\u61c9\u7528\u7684\u7bc4\u570d\u5f88\u5ee3\uff0c\u6709\u8cc7\u8a0a\u6aa2\u7d22\u3001\u8a9e\u97f3\u8fa8\u8b58\u3001\u5149\u5b78\u6587\u5b57\u8fa8\u8b58 \u548c \u6587 \u4ef6 \u5206 \u985e \u7b49 \u65b9 \u5411 \u3002 \u672c \u8ad6 \u6587 \u7684 \u4e3b \u67b6 \u69cb \u6df7 \u5408 \u5f0f \u6a5f \u7387 \u6aa2 \u7d22 \u5373 \u662f n-gram \u6a21 \u578b \u65bc \u8cc7 \u8a0a \u6aa2 \u7d22 \u4e0a \u7684 \u61c9 \u7528 \uff0c \u6211 \u5011 \u9996 \u5148 \u91dd \u5c0d n-gram \u7684 \u5efa \u7acb \u65b9 \u6cd5 \u8207 \u8a55 \u4f30 \u4f5c \u6982 \u7565 \u7684 \u4ecb \u7d39 \u3002 \u8a9e \u8a00 \u6a21 \u578b \u4e3b \u8981 \u7684 \u529f \u80fd \u662f \u5728 \u8a55 \u4f30 \u4e00 \u6bb5 \u6587 \u53e5 \u51fa \u73fe \u7684 \u6a5f \u7387 \uff0c \u5047 \u8a2d \u6709 \u4e00 \u67e5 \u8a62 \u53e5 Q \u5176 \u9577 \u5ea6 \u70ba T \u4e26 \u4e14 \u662f \u7531 \u4e00 \u6bb5 \u8a5e \u5e8f \u5217 T q q q , , , 2 1 K \u6240 \u7d44 \u6210 \uff0c \u5247 Q \u51fa \u73fe \u7684 \u6a5f \u7387 \u53ef \u4ee5 \u5beb \u6210 \uff1a \u220f = \u2212 \u2212 = = = T t t t T T T q q q q P q q q q P q q P q P q q q P Q P 1 1 2 1 1 2 1 1 2 1 2 1 ) , , , | ( ) , , , | ( ) | ( ) ( ) , , , ( ) ( K K L K (3) \u4f46 \u662f \u6b64 \u7a2e \u65b9 \u6cd5 \u7684 \u8a08 \u7b97 \u91cf \u8207 \u7a7a \u9593 \u4f7f \u7528 \u91cf \u592a \u5927 \u800c \u7121 \u6cd5 \u5be6 \u73fe \uff0c \u70ba \u89e3 \u6c7a \u9019 \u500b \u554f \u984c \u6240 \u4ee5 \u6709 n-gram \u6a21 \u578b \u7684 \u7522 \u751f \uff0c \u5728 n-gram \u6a21 \u578b \u4e2d \uff0c \u5b83 \u662f \u5047 \u8a2d \u4e00 \u500b \u8a5e \u51fa \u73fe \u7684 \u6a5f \u7387 \u53ea \u8ddf \u524d \u9762 n-1 \u500b \u8a5e \u6709 \u95dc \uff0c \u56e0 \u6b64 ( 3)\u5f0f\u53ef\u4ee5\u8fd1\u4f3c\u70ba \u220f = \u2212 + \u2212 \u2245 = T t t n t t T q q P q q q P Q P 1 1 1 2 1 ) | ( ) , , , ( ) ( K (4) \u5176 \u4e2d 1 1 \u2212 + \u2212 t n t q \u4ee3 \u8868 1 2 1 , , , \u2212 + \u2212 + \u2212 t n t n t q q q L \u8a5e \u5e8f \u5217 \u5982 \u6b64 \u4e00 \u4f86 \u4f7f \u7528 n-gram \u53ef \u4ee5 \u5927 \u91cf \u7bc0 \u7701 \u8a08 \u7b97 \u6642 \u9593 \u8207 \u8a18 \u61b6 \u9ad4 \uff0c \u8b93 \u5be6 \u7528 \u6027 \u5927 \u70ba \u63d0 \u9ad8 \u3002 \u800c \u5efa \u7acb n-gram \u6a5f \u7387 \u6a21 \u578b ) | ( 1 1 \u2212 + \u2212 t n t t q q P \u7684 \u57fa \u672c \u5f0f \u5982 \u4e0b \uff1a \u2211 + \u2212 + \u2212 \u2212 + \u2212 + \u2212 \u2212 + \u2212 = = j q j n j t n t t n t t n t t n t t q c q c q c q c q q P ) ( ) ( ) ( ) ( ) | ( 1 1 1 1 1 1 1 (5) \u5176 \u4e2d ) ( 1 t n t q c + \u2212 \u4ee3 \u8868 t n t q 1 + \u2212 \u5728 \u8a13 \u7df4 \u6587 \u96c6 \u4e2d \u51fa \u73fe \u7684 \u6b21 \u6578 3.2 \u6df7 \u5408 \u5f0f \u6a5f \u7387 \u6aa2 \u7d22 \u6a21 \u578b \u6df7 \u5408 \u5f0f \u6a5f \u7387 \u6aa2 \u7d22 \u662f \u4ee5 n-gram \u6a21 \u578b \u70ba \u4e3b \u7684 \u8cc7 \u8a0a \u6aa2 \u7d22 \u6280 \u8853 \u3002 \u6b64 \u67b6 \u69cb \u539f \u51fa \u65bc [11]\uff0c\u88ab\u7a31\u70ba\u96b1\u85cf\u5f0f\u99ac\u53ef\u592b\u6a21\u578b ( Hidden Markov Model)[13]\uff0c\u53ef\u662f\u56e0\u70ba\u6b64\u67b6\u69cb\u53ea\u6709\u55ae\u4e00\u72c0\u614b\uff0c\u6545\u7a31\u70ba\"\u6df7\u5408\u5f0f\u6a5f\u7387\u6a21\u578b\"\u8f03\u70ba\u9069\u7576\u3002\u88e1\u9762\u5305\u542b \u4e86 P(q i | d j )\u548c P(q i | q i-1 , d j )\u9019\u7a2e\u76f8\u5c0d\u65bc\u6587\u4ef6 d j \u7684 Uni-gram \u548c Bi-gram\uff0c\u4e26\u4e14\u70ba\u4e86\u8868\u793a\u51fa\u67e5\u8a62\u53e5 Uni-gram \u548c Bi-gram \u4e00 \u822c \u5206 \u5e03 \u7684 \u60c5 \u5f62 \u800c \u5f15 \u5165 \u4e86 \u4e00 \u500b \u80cc \u666f \u8a9e \u6599 (Corpus)\uff0c\u9019\u500b\u80cc\u666f\u8a9e\u6599\u7684\u8a9e\u8a00\u6a21\u578b P(q i |Corpus) \u548c P(q i | q i-1 ,Corpus) \u662f \u7531 \u5927 \u6279 \u7684 \u6587 \u4ef6 \u96c6 \u5408 \u4f9d \u7167 ( 5)\u6240\u7b97\u51fa\u4f86\u7684\u3002\u800c\u76f8\u4f3c\u5ea6\u7684\u91cf\u6e2c P(Q |d j )\uff0c\u5373\u662f\u7531\u67e5\u8a62\u53e5 Q \u4e2d \u6bcf \u500b \u8a5e \uff0c \u5faa \u5e8f \u8a08 \u7b97 \u7684 \u6a5f \u7387 \u503c \uff0c \u7d2f \u8a08 \u7684 \u7d50 \u679c \u5373 \u53ef \u8996 \u70ba \u5176 \u76f8 \u95dc \u7a0b \u5ea6 \uff0c \u5247 \u67e5 \u8a62 \u53e5 Q \u76f8 \u95dc \u65bc \u6587 \u4ef6 i d \u7684 \u6a5f \u7387 \u8868 \u793a \u5982 \u4e0b \uff1a [ ] \u23a5 \u23a5 \u23a6 \u23a4 \u23a2 \u23a2 \u23a3 \u23a1 + + + \u00d7 + = \u2212 \u2212 = \u03a0 ) , | ( ) , | ( ) | ( ) | ( ) | ( ) | ( ) | ( 1 4 1 3 2 1 | | 2 1 2 1 1 j t t j t t t j t Q t j j d q q P d q q P Corpus q P d q P Corpus q P d q P d Q P \u03bb \u03bb \u03bb \u03bb \u03bb \u03bb (6) \u95dc \u65bc \u6df7 \u5408 \u5f0f n-gram \u6aa2 \u7d22 \u6a21 \u578b \u4e4b \u63a8 \u5c0e \u8207 \u8a73 \u7d30 \u5167 \u5bb9 \u53ef \u53c3 \u8003 [17]\u3002 \u672c \u8ad6 \u6587 \u7684 \u91cd \u9ede \u4fbf \u662f \u5728 \u6df7 \u5408 \u5f0f \u6a5f \u7387 \u6aa2 \u7d22 \u6a21 \u578b \u5167 \u52a0 \u5165 \u56de \u994b \u7684 \u6a5f \u5236 \uff0c \u4e0b \u65b9 \u5716 \u4e09 \u70ba \u672c \u8ad6 \u6587 \u6aa2 \u7d22 \u6a21 \u578b \u4e4b \u65b0 \u7a4e \u56de \u994b \u6d41 \u7a0b \u67b6 \u69cb \uff0c \u800c \u5176 \u4e2d \u7684 \u7814 \u7a76 \uff0c \u4e3b \u8981 \u5728 \u76f8 \u95dc \u8cc7 \u8a0a \u56de \u994b \u65b9 \u5f0f \u6709 \u4e09 \u500b \u6539 \u9032 \u65b9 \u5411 \uff1a \u67e5 \u8a62 \u53e5 \u64f4 \u5145 \u3001 \u67e5 \u8a62 \u8a5e \u6b0a \u91cd \u91cd \u8abf \u6574 \u548c \u6587 \u4ef6 \u6a21 \u578b \u8abf \u6574 ( Document Model Adaptation) \uff1b \u65bc \u524d \u4e00 \u56de \u7684 \u6aa2 \u7d22 \u53ca \u6587 \u4ef6 \u6392 \u5e8f \u5b8c \u6210 \u5f8c \uff0c \u5148 \u4f7f \u7528 Top N \u7684 \u6587 \u4ef6 \u505a \u67e5 \u8a62 \u53e5 \u64f4 \u5145 \u3001 \u67e5 \u8a62 \u8a5e \u6b0a \u91cd \u91cd \u8abf \u6574 \u4e4b \u5f8c \u66f4 \u65b0 Query \u5f8c ,\u65bc\u6aa2\u7d22\u958b\u59cb\u6642\u8abf\u6574\u6587\u4ef6\u6a21\u578b\u3002\u800c\u6bcf\u4e00\u7a0b\u5e8f\u4e4b\u8655\u7406\u904e\u7a0b\uff0c\u5c07\u65bc\u63a5\u4e0b\u4f86\u4e4b\u5404\u7bc0 \u505a \u8a73 \u7d30 \u7684 \u63cf \u8ff0 \u3002 \u5716 \u4e09 \u3001 \u52a0 \u5165 \u76f8 \u95dc \u8cc7 \u8a0a \u56de \u994b \u6a5f \u5236 \u7684 \u6aa2 \u7d22 \u6d41 \u7a0b 3.3 \u67e5 \u8a62 \u53e5 \u64f4 \u5145 \u904e \u53bb \u7684 \u7814 \u7a76 \u4e2d \uff0c \u90fd \u986f \u793a \u51fa \u4e86 \u67e5 \u8a62 \u53e5 \u64f4 \u5145 \u7684 \u6548 \u679c \uff0c \u4e26 \u767c \u73fe \u67e5 \u8a62 \u8a5e \u7684 \u6311 \u9078 \uff0c \u61c9 \u8a72 \u4ee5 \u63a5 \u8fd1 \u6aa2 \u7d22 \u6642 \u7684 \u8a08 \u7b97 \u5f0f \u70ba \u4e3b \uff0c \u5982 \u6b64 \u8f03 \u6709 \u6a5f \u6703 \u88dc \u5145 \u9069 \u5408 \u6b64 \u6aa2 \u7d22 \u7cfb \u7d71 \u7684 \u67e5 \u8a62 \u8a5e \uff1b \u5728 \u672c \u8ad6 \u6587 \u88e1 \uff0c \u56e0 \u70ba \u63a1 \u7528 \u8a9e \u8a00 \u6a21 \u578b \u7684 \u65b9 \u5f0f \u6aa2 \u7d22 \uff0c \u6240 \u4ee5 \u64f4 \u5145 \u8a5e \u6311 \u9078 \u7684 \u65b9 \u5f0f \u4fbf \u7c21 \u55ae \u5730 \u5229 \u7528 \u5b57 \u8a5e \u76f8 \u5c0d \u65bc \u6587 \u4ef6 \u7684 \u6a5f \u7387 \uff0c \u56e0 \u6b64 \u6211 \u5011 \u6839 \u64da \u4e0b \u5f0f \u70ba \u9078 \u64c7 \u5224 \u65b7 \u5f0f \uff0c \u5c0d \u6bcf \u500b \u51fa \u73fe \u65bc \u6392 \u540d \u524d N \u540d \u6587 \u4ef6 } , , { 1 N d d L \u5167 \u7684 \u8a5e \u505a \u6392 \u540d \uff0c \u4e26 \u627e \u51fa \u540d \u6b21 \u6700 \u9ad8 \u7684 \u524d \u5e7e \u500b \u8a5e \u52a0 \u5165 \u67e5 \u8a62 \u53e5 \u4e2d \uff1a ) | ( ) ( ) | ( 1 j N j j j t d Q P d P d q P \u2211 = (7) \u5176 \u4e2d t q \u662f \u51fa \u73fe \u5728 \u524d N \u540d \u6587 \u4ef6 \u5167 \u7684 \u8a5e \uff0c ) | ( j t d q P \u70ba \u5728 \u6587 \u4ef6 j d\u02c6\u7684 Uni-gram \u7684 \u6a5f \u7387 \uff1b ) ( j d P \u70ba \u4e8b \u524d ( Prior)\u6a5f\u7387\uff0c\u662f\u6587 \u4ef6 j d\u02c6\u9577 \u5ea6 ( \u8a5e \u6578 ) \u65bc N \u7bc7 \u6587 \u4ef6 \u9577 \u5ea6 \u7e3d \u548c \u7684 \u6bd4 \u4f8b \uff1b ) | ( j d Q P \u5c31 \u662f \u524d \u4e00 \u6b21 \u905e \u8ff4 \u7684 \u6aa2 \u7d22 \u4e2d \uff0c \u67e5 \u8a62 \u53e5 Q \u548c \u6587 \u4ef6 j d \u6bd4 \u5c0d \u7684 \u5206 \u6578 \u3002 3.4 \u67e5 \u8a62 \u8a5e \u6b0a \u91cd \u91cd \u65b0 \u8abf \u6574 \u5728 \u5411 \u91cf \u6aa2 \u7d22 \u7684 \u76f8 \u95dc \u8cc7 \u8a0a \u56de \u994b \u4e2d \u6709 \u4e00 \u7a2e \u5e38 \u88ab \u61c9 \u7528 \u4e14 \u8b8a \u5316 \u7684 Rocchio \u516c \u5f0f \uff0c \u5176 \u7126 \u9ede \u653e \u5728 \u6b63 \u9762 \u7684 \u4f8b \u5b50 ( \u76f8 \u95dc \u6587 \u4ef6 ) \uff0c \u800c \u5ffd \u7565 \u4e86 \u8ca0 \u9762 \u4f8b \u5b50 \u7684 \u52a0 \u5165 ( \u4e0d \u76f8 \u95dc \u6587 \u4ef6 ) \u3002 \u5f9e \u9019 \u88e1 \uff0c \u6211 \u5011 \u53ef \u4ee5 \u5f97 \u5230 \u4e00 \u500b \u60f3 \u6cd5 \uff0c \u6709 \u4e9b \u67e5 \u8a62 \u8a5e \u56e0 \u70ba \u6709 \u5176 \u91cd \u8981 \u7684 \u4ee3 \u8868 \u6027 \uff0c \u6240 \u4ee5 \u5728 \u67d0 \u4e9b \u76f8 \u95dc \u6587 \u4ef6 \u4e2d \u51fa \u73fe \u7684 \u6b21 \u6578 \u6bd4 \u8f03 \u591a \uff0c \u4f7f \u5f97 \u9019 \u4e9b \u76f8 \u95dc \u6587 \u4ef6 \u7684 \u6392 \u540d \u6703 \u6bd4 \u8f03 \u524d \u9762 \uff0c \u4f46 \u662f \u9019 \u4e9b \u67e5 \u8a62 \u8a5e \u5728 \u5176 \u4ed6 \u7684 \u76f8 \u95dc \u6587 \u4ef6 \u51fa \u73fe \u6b21 \u6578 \u6bd4 \u8f03 \u5c11 \uff0c \u65bc \u662f \u4f7f \u5f97 \u9019 \u4e9b \u6587 \u4ef6 \u5c31 \u6703 \u88ab \u6392 \u540d \u6bd4 \u8f03 \u5f8c \u9762 \uff1b \u5047 \u8a2d \u6211 \u5011 \u80fd \u5920 \u5c0d \u9019 \u4e9b \u67e5 \u8a62 \u8a5e \u9069 \u7576 \u5730 \u5206 \u914d \u4e00 \u6b0a \u91cd \uff0c \u65bc \u5f0f \u5b50 \u4e2d \u53ef \u6539 \u8b8a \u6bcf \u500b \u67e5 \u8a62 \u8a5e \u6240 \u63d0 \u4f9b \u4e4b \u8cc7 \u8a0a \uff0c \u6bd4 \u8f03 \u91cd \u8981 \u7684 \u8a5e \u7d66 \u4e88 \u8f03 \u9ad8 \u7684 \u6b0a \u91cd \uff0c \u76f8 \u53cd \u5730 \uff0c \u5c0d \u65bc \u4e0d \u91cd \u8981 \u7684 \u8a5e \u7d66 \u4e88 \u8f03 \u4f4e \u7684 \u6b0a \u91cd \uff0c \u5982 \u6b64 \uff0c \u671f \u671b \u5c0d \u65bc \u9019 \u4e9b \u542b \u6709 \u5177 \u4ee3 \u8868 \u6027 \u67e5 \u8a62 \u8a5e \u6bd4 \u8f03 \u5c11 \u7684 \u76f8 \u95dc \u6587 \u4ef6 \u5728 \u8a08 \u7b97 \u5c0d \u67e5 \u8a62 \u53e5 \u4e4b \u76f8 \u4f3c \u5206 \u6578 \u6642 \u80fd \u5920 \u6709 \u6240 \u63d0 \u6607 \u3002 \u6211 \u5011 \u628a \u7c21 \u5316 \u8a9e \u8a00 \u6a21 \u578b \u7684 \u6a5f \u7387 \u6aa2 \u7d22 \u5f0f \u4f86 \u770b \uff1a ) | ( ) | ( | | 1 j t Q t j d q P d Q P \u03a0 = = (8) \u82e5 \u53ef \u4ee5 \u5f9e \u5f0f \u5b50 \u4e2d \u62bd \u53d6 \u51fa \u4e00 \u500b \u56e0 \u5b50 t \u03ba \u4ee3 \u8868 \u67e5 \u8a62 \u8a5e q t \u7684 \u6b0a \u91cd \uff0c \u5728 \u7b2c \u4e00 \u8f2a \u7684 \u6700 \u521d \u6aa2 \u7d22 \u904e \u7a0b \u4e2d \uff0c \u521d \u59cb \u7684 \u67e5 \u8a62 \u53e5 \u56e0 \u70ba \u6c92 \u6709 \u5176 \u4ed6 \u8cc7 \u8a0a \u4ecb \u5165 \uff0c \u6240 \u4ee5 \u6bcf \u500b t \u03ba \u53ef \u8996 \u505a 1\uff0c\u5c0d\u539f\u7d50\u679c\u4e0d\u53d7\u4efb\u4f55\u5f71\u97ff\uff0c\u5373\uff1a ) | ( ) | ( | | 1 j t t Q t j d q P d Q P \u03ba \u03a0 = = (9) \u81f3 \u65bc \u4e0b \u4e00 \u8f2a \u7684 \u66f4 \u65b0 \u82e5 \u4ee5 t t \u03ba \u03ba \u2206 + \u8868 \u793a \uff0c \u56e0 \u70ba \u5728 \u4f7f \u7528 \u8005 \u6240 \u4e0b \u7684 \u67e5 \u8a62 \u53e5 \u4e2d \uff0c \u7d93 \u904e \u8abf \u6574 \u51fa \u4f86 \u7684 \u6b0a \u91cd \u5fc5 \u6709 \u4e00 \u5b9a \u7684 \u4ee3 \u8868 \u6027 \uff0c \u7576 \u6b0a \u91cd \u503c \u9ad8 \u6642 \uff0c \u5247 \u6b64 \u67e5 \u8a62 \u8a5e \u53ef \u770b \u505a \u6aa2 \u7d22 \u4e4b \u95dc \u9375 \uff0c \u5728 \u6b64 \u60c5 \u5f62 \u4e0b \uff0c \u820a \u7684 \u67e5 \u8a62 \u8a5e \u6b0a \u91cd \u4e5f \u61c9 \u8a72 \u5728 \u4e0b \u4e00 \u56de \u7684 \u56de \u994b \u7a0b \u5e8f \u4e2d \u4fdd \u7559 \uff0c \u4e26 \u52a0 \u4e0a \u4e00 \u66f4 \u65b0 \u6b0a \u91cd \u503c t \u03ba \u2206 \u4ee5 \u505a \u8abf \u6574 \uff0c \u6bcf \u4e00 \u500b \u67e5 \u8a62 \u8a5e \u7684 \u6b0a \u91cd \u66f4 \u65b0 \u503c \u4f9d \u64da \u6b64 \u5206 \u914d \u7684 \u91cf \u505a \u6b63 \u898f \u5316 \uff0c \u5f97 \u5230 \u4ee5 \u4e0b \u66f4 \u65b0 \u5f8c \u7684 \u6a5f \u7387 \u503c \uff1a \u2211 = \u2206 + \u2206 + = |Q| k k k t t t 1 ) ( \u03ba \u03ba \u03ba \u03ba \u03ba (10) \u5176 \u4e2d 1 | | = \u2211 Q t t \u03ba \uff0c \u800c |Q|\u610f\u6307\u67e5\u8a62\u53e5\u7684\u9577\u5ea6\u3002\u4ee4 D \u662f \u4e00 \u500b \u96c6 \u5408 \uff0c \u88e1 \u9762 \u662f \u6aa2 \u7d22 \u5206 \u6578 \u4e2d \u6392 \u540d \u524d N \u540d \u7684 \u6587 \u4ef6 \uff0c } , , , { 2 1 N d d d D L = \uff0c K \u4e5f \u662f \u4e00 \u500b \u96c6 \u5408 \uff0c \u88e1 \u9762 \u662f \u6bcf \u500b \u67e5 \u8a62 \u8a5e \u76f8 \u5c0d \u61c9 \u7684 \u6b0a \u91cd \uff0c } , , , { 2 1 Q K \u03ba \u03ba \u03ba L = \u3002 \u56e0 \u70ba \u6aa2 \u7d22 \u5f0f \u4e4b \u76ee \u7684 \u662f \u70ba \u4e86 \u63d0 \u6607 \u8207 \u67e5 \u8a62 \u53e5 \u76f8 \u95dc \u6587 \u4ef6 \u7684 \u5206 \u6578 \uff0c \u4ee5 \u4fbf \u589e \u52a0 \u76f8 \u95dc \u6587 \u4ef6 \u8207 \u975e \u76f8 \u95dc \u6587 \u4ef6 \u4e4b \u5dee \u5225 \uff0c \u6211 \u5011 \u70ba \u6bcf \u500b \u67e5 \u8a62 \u8a5e \u52a0 \u5165 \u76f8 \u5c0d \u61c9 \u7684 \u6b0a \u91cd \u4e5f \u662f \u70ba \u4e86 \u9019 \u500b \u539f \u56e0 \uff0c \u6240 \u4ee5 \u6211 \u5011 \u5fc5 \u9808 \u627e \u51fa \u4e00 \u7d44 \u9069 \u7576 \u7684 \u6b0a \u91cd \uff0c \u800c \u9019 \u7d44 \u6b0a \u91cd \u662f \u78ba \u5b9a \u53ef \u4ee5 \u63d0 \u6607 \u8207 \u76f8 \u95dc \u6587 \u4ef6 \u4e4b \u76f8 \u4f3c \u5ea6 \uff1a ) , | ( max ar\u011d K D Q P K K = (11) \u5176 \u4e2d \u80fd \u89c0 \u5bdf \u5230 \u7684 \u8cc7 \u6599 \u662f \u6211 \u5011 \u6240 \u4f7f \u7528 \u7684 \u8a9e \u8a00 \u6a21 \u578b \u8207 \u67e5 \u8a62 \u53e5 Q\uff0c\u9019\u662f\u4e0d\u5b8c\u6574\u7684\u8cc7\u6599\u96c6(Incomplete Data) \uff0c \u4f46 \u662f \u6b0a \u91cd \u70ba \u672a \u77e5 \u7684 \u53c3 \u6578 \uff0c \u5982 \u6b64 \u53ea \u80fd \u60f3 \u8fa6 \u6cd5 \u53bb \u8fd1 \u4f3c \u51fa \u9069 \u7576 \u7684 \u6b0a \u91cd \uff0c \u6240 \u4ee5 \u6211 \u5011 \u4ee5 \u6700 \u4f73 \u76f8 \u4f3c \u5ea6 \u4f30 \u6e2c ( Maximum Likelihood Estimation\uff0cMLE)\u70ba\u6a19\u6e96(Criterion) \uff0c \u4f7f \u7528 EM \u6f14 \u7b97 \u6cd5 [5]\u7684\u6b65\u9a5f\u53bb\u63a8\u4f30\u51fa\u65b0\u7684\u4f30\u6e2c\u503c t \u03ba\u02c6\u7684 \u516c \u5f0f \u5982 \u4e0b \uff1a N d q P d q P d q P d q P d q P d q P N j Q k j k k j t t Q l N j Q k j k k j l l", | |
| "cite_spans": [], | |
| "ref_spans": [], | |
| "eq_spans": [], | |
| "section": "", | |
| "sec_num": null | |
| }, | |
| { | |
| "text": "= = 1 | | 1 | | 1 1 | | 1 1 | | 1 ) | ( ) | ( ) | ( ) | ( ) | ( ) | ( \u02c6\u03ba \u03ba \u03ba \u03ba \u03ba \u03ba \u03ba (12) t \u03ba\u02c6\u503c \u5c07 \u6703 \u4f9d \u7167 ( 12)\u905e\u8ff4\u5730\u88ab\u8a13\u7df4\u51fa\u4f86\u3002 3.5 \u8c9d \u6c0f \u6df7 \u5408 \u5f0f \u6a5f \u7387 \u6a21 \u578b \u8abf \u6574 \u5c0d \u65bc \u6587 \u4ef6 \u6a21 \u578b \uff0c \u6211 \u5011 \u5617 \u8a66 \u5229 \u7528 \u524d \u4e00 \u56de \u6aa2 \u7d22 \u6240 \u5f97 \u5230 \u6392 \u540d \u524d N \u540d \u6587 \u4ef6 \u7684 \u6587 \u4ef6 \u8a9e \u8a00 \u6a21 \u578b \u4f86 \u88dc \u5145 \u76ee \u524d \u67e5 \u8a62 \u53e5 \u6b63 \u8981 \u6bd4 \u5c0d \u7684 \u6587 \u4ef6 d j \u5176 \u6587 \u4ef6 \u6a21 \u578b \u7684 \u8cc7 \u8a0a \uff0c \u4f7f \u5f97 \u6587 \u4ef6 d j \u7684 \u8a9e \u8a00 \u6a21 \u578b \u80fd \u9069 \u7528 \u65bc \u76ee \u524d \u67e5 \u8a62 \u53e5 \u7684 \u6aa2 \u7d22 \u3002 \u800c \u8abf \u6574 \u6587 \u4ef6 \u8a9e \u8a00 \u6a21 \u578b \u4e4b \u76ee \u7684 \u4ee5 \u4e0b \u5716 \u4f86 \u8aaa \u660e \uff1a ( \u6c34 \u5e73 \u8ef8 \uff1a \u8a5e \u5f59 t\uff1b\u5782\u76f4\u8ef8\uff1a\u5728\u6587\u4ef6 d \u5167 \u7684 \u8a5e \u5f59 t \u6a5f \u7387 P(t | d j )\u3002) P ( t | d j ) t t A .", | |
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| { | |
| "text": "B . ", | |
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| "text": "P ( t | d j ) \u5716 \u56db \u3001 \u8207 \u67e5 \u8a62 \u53e5 \u76f8 \u95dc \u6587 \u4ef6 \u7684 \u8a9e \u8a00 \u6a21 \u578b \u5047 \u60f3 \u5716 \uff0c (A)\u672a\u7d93\u904e\u76f8\u95dc\u8cc7\u8a0a\u56de\u994b\u7684\u8abf\u6574\u548c(B)\u7d93\u904e\u76f8\u95dc\u8cc7\u8a0a\u56de\u994b\u7684\u8abf\u6574 A . B . P ( t | d j ) t P ( t | d j ) t \u5716 \u4e94 \u3001 \u8207 \u67e5 \u8a62 \u53e5 \u4e0d \u76f8 \u95dc \u6587 \u4ef6 \u7684 \u8a9e \u8a00 \u6a21 \u578b \u5047 \u60f3 \u5716 \uff0c (A)\u672a\u7d93\u904e\u76f8\u95dc\u8cc7\u8a0a\u56de\u994b\u7684\u8abf\u6574\u548c(B)\u7d93\u904e\u76f8\u95dc\u8cc7\u8a0a\u56de\u994b\u7684\u8abf\u6574 A . B . P ( t | d j ) P ( t | d j ) t t \u5716 \u516d \u3001 \u76f8 \u95dc \u8207 \u4e0d \u76f8 \u95dc \u6587 \u4ef6 \u7684 \u6a21 \u578b \u91cd \u758a \u5047 \u60f3 \u5716 \uff0c (A)\u672a\u7d93\u904e\u76f8\u95dc\u8cc7\u8a0a\u56de\u994b\u7684\u8abf\u6574\u548c(B)\u7d93\u904e\u76f8\u95dc\u8cc7\u8a0a\u56de\u994b\u7684\u8abf\u6574 \u5728 \u9019 \u4e9b \u8a9e \u8a00 \u6a21 \u578b \u7684 \u6a5f \u7387 \u5206 \u5e03 \u88e1 \uff0c \u6c34 \u5e73 \u8ef8 \u4e0a \u51fa \u73fe \u6846 \u7dda \u7684 \u9593 \u9694 \uff0c \u5373 \u4ee3 \u8868 \u67e5 \u8a62 \u8a5e \u51fa \u73fe \u7684 \u7bc4 \u570d \uff0c \u6240 \u4ee5 \u6b64 \u9593 \u9694 \u8207 \u66f2 \u7dda \u570d \u8d77 \u4f86 \u4e4b \u5340 \u57df \u53ef \u4ee5 \u8aaa \u662f \u67e5 \u8a62 \u53e5 \u65bc \u6587 \u4ef6 \u6a21 \u578b \u5167 \u53ef \u80fd \u6703 \u7528 \u5230 \u7684 \u6a5f \u7387 \u503c \uff0c \u5716 \u4e94 \u662f \u6587 \u4ef6 \u548c \u67e5 \u8a62 \u53e5 \u76f8 \u95dc \u7684 \u60c5 \u5f62 \uff0c \u5716 \u516d \u662f \u548c \u67e5 \u8a62 \u53e5 \u4e0d \u76f8 \u95dc \u7684 \u6587 \u4ef6 \u6a5f \u7387 \u5206 \u5e03 \u60c5 \u5f62 \uff0c \u5716 \u4e03 \u70ba \u5169 \u7a2e \u6587 \u4ef6 \u6a21 \u578b \u5c0d \u65bc \u67e5 \u8a62 \u53e5 \u7684 \u6a5f \u7387 \u5206 \u5e03 \u91cd \u758a \u7684 \u6bd4 \u8f03 \u3002 \u7576 \u539f \u59cb \u7684 \u5169 \u7bc7 \u6587 \u4ef6 \u5176 \u5206 \u5e03 \u60c5 \u5f62 \u70ba \u5716 \u4e94 -(A)\u548c\u5716\u516d-(A)\uff0c\u91cd\u758a\u4e4b\u5f8c\u5f97\u5230\u5716\u4e03-(A)\uff0c\u4e26\u7531\u5716\u4e03-(A)\u53ef\u5f97\u77e5\uff0c\u5c0d\u65bc\u76ee\u524d\u7684\u67e5\u8a62\u53e5\u7d93\u904e\u6bd4\u5c0d\u8a08 \u7b97 \u5f97 \u5230 \u7684 \u5206 \u6578 \u5dee \u8ddd \u6bd4 \u8f03 \u5c0f \uff0c \u9019 \u6709 \u53ef \u80fd \u6703 \u9020 \u6210 \u6aa2 \u7d22 \u6392 \u540d \u51fa \u73fe \u554f \u984c \u3002 \u82e5 \u662f \u5728 \u524d \u4e00 \u56de \u6aa2 \u7d22 \u51fa \u4f86 \u7684 \u7d50 \u679c \uff0c \u524d N \u540d \u7684 \u6587 \u4ef6 \u5176 \u8cc7 \u8a0a \u662f \u53ef \u4ee5 \u5229 \u7528 \u7684 \uff0c \u610f \u5373 \u53ef \u7528 \u4f86 \u8abf \u6574 \u6bcf \u4efd \u6587 \u4ef6 \u7684 \u6a21 \u578b \uff0c \u7d93 \u904e \u8abf \u6574 \u5f8c \u5f97 \u5230 \u5716 \u4e94 -(B)\uff0c\u5716\u516d-(B)\u4ee5\u53ca\u5c07\u9019\u5169\u7a2e\u8abf\u6574 \u904e \u7684 \u6587 \u4ef6 \u6a21 \u578b \u5206 \u5e03 \u91cd \u758a \u5f8c \u5f97 \u5230 \u5716 \u4e03 -(B)\u7684\u60c5\u5f62\uff0c\u7d50\u679c\u662f\u76f8\u95dc\u8207\u4e0d\u76f8\u95dc\u4e4b\u8a9e\u8a00\u6a21\u578b\u5dee\u7570\u5ea6\u8b8a\u5927\u4e86\uff0c\u5982\u6b64\u4e00\u4f86\u5c31\u53ef\u4ee5 \u6e1b \u5c11 \u8a9e \u8a00 \u6a21 \u578b \u7684 \u6a21 \u7cca \u60c5 \u5f62 \uff0c \u4e26 \u4e14 \u6709 \u5229 \u65bc \u76f8 \u95dc \u6587 \u4ef6 \u6aa2 \u7d22 \u5206 \u6578 \u7684 \u63d0 \u6607 \u3002 \u5047 \u8a2d \u8cc7 \u6599 \u5eab \u88e1 \u7684 \u6587 \u4ef6 d j \u548c \u76f8 \u5c0d \u61c9 \u7684 \u6587 \u4ef6 \u8a9e \u8a00 \u6a21 \u578b \uff0c \u53ef \u4ee5 \u548c \u6392 \u5e8f \u5217 \u8868 ( Ranked List)\u5167\u6392\u540d\u524d N \u540d \u7684 \u6587 \u4ef6 \u4e00 \u8d77 \u4f5c \u7528 \uff0c \u4f86 \u7522 \u751f \u51fa \u65b0 \u7684 \u6587 \u4ef6 \u8a9e \u8a00 \u6a21 \u578b \uff0c \u6b64 \u6642 \u5373 \u662f \u628a \u6392 \u540d \u524d N \u540d \u7684 \u6587 \u4ef6 \u8a9e \u8a00 \u6a21 \u578b \u548c \u6587 \u4ef6 d j \u7684 \u6587 \u4ef6 \u8a9e \u8a00 \u6a21 \u578b \u6df7 \u5408 \u6210 \u4e00 \u500b \u65b0 \u7684 \u6587 \u4ef6 \u8a9e \u8a00 \u6a21 \u578b \uff0c \u6211 \u5011 \u5c07 \u5c0e \u5165 \u6b0a \u91cd \u53c3 \u6578 \u4f5c \u8a9e \u8a00 \u6a21 \u578b \u7684 \u5408 \u4f75 \uff0c \u539f ( 8)\u5728\u52a0\u5165\u4e86\u76f8\u95dc\u8cc7\u8a0a\u56de\u994b\u7684\u6a5f\u5236\uff0c\u65bc\u7b2c \u4e8c \u6b21 \u4ee5 \u53ca \u4e4b \u5f8c \u7684 \u905e \u8ff4 \u6aa2 \u7d22 \u904e \u7a0b \uff0c \u5c07 \u6703 \u8b8a \u6210 \u220f = = | | 1 ) | ( ) | ( Q t j t j d q P d Q P (13) ( 13)\u4e4b\u8b8a\u63db\u904e\u7a0b\u63cf\u8ff0\u65bc\u4e0b\uff1a 1.\u4ee4 M j \u70ba \u4e00 \u500b \u76f8 \u5c0d \u61c9 \u65bc } , , , { 1 N j j d d d D L = \u4e4b \u6b0a \u91cd \u53c3 \u6578 ( Mixture Weight)\u96c6\u5408,\u88e1\u9762\u653e\u7f6e\u76f8\u5c0d\u61c9\u7684\u5408\u4f75\u6b0a\u91cd\u53c3\u6578\uff0c } , , , { , 1 , 0 , N j j j j m m m M L = \uff0c 1 1 , 0 , = + \u2211 = N k k j j m m \uff0c j D \u548c M j \u7686 \u662f \u91dd \u5c0d \u6587 \u4ef6 d j \u7528 \u5230 \u7684 \u8cc7 \u8a0a \u3002 \u800c m j,k \u610f \u6307 \u6df7 \u5408 \u6578 k \u4e4b \u662f \u8a9e \u8a00 \u6a21 \u578b \u6b0a \u91cd \uff0c \u6703 \u96a8 \u8457 \u6587 \u4ef6 d j \u6709 \u6240 \u4e0d \u540c \u3002 2.\u56e0\u70ba\u67e5\u8a62\u8a5e\u662f\u548c\u6587\u4ef6\u5167\u5bb9\u76f8\u95dc\uff0c\u800c\u6587\u4ef6\u5167\u5bb9\u548c\u6587\u4ef6\u6a21\u578b\u76f8\u95dc\uff0c\u82e5\u662f\u6587\u4ef6\u6a21\u578b\u7522\u751f\u6587\u4ef6\u5167\u5bb9\u4e4b\u6a5f\u7387\u80fd\u66f4\u9069\u7576\uff0c \u5247 \u4e00 \u500b \u548c \u6b64 \u6587 \u4ef6 \u76f8 \u95dc \u4e4b \u67e5 \u8a62 \u53e5 Q\uff0c\u4f7f\u7528\u6b64\u6587\u4ef6\u6a21\u578b\u7522\u751f\u51fa\u4f86\u7684\u6a5f\u7387\u4e5f\u6703\u66f4\u9069\u7576\uff1b\u6240\u4ee5\u6587\u4ef6\u8a9e\u8a00\u6a21\u578b\u6b0a\u91cd\u7684\u8a13 \u7df4 \u904e \u7a0b \u5373 \u662f \u4ee5 \u6587 \u4ef6 \u5167 \u5bb9 \u70ba \u4f30 \u6e2c \u4e4b \u4e3b \u8981 \u5167 \u5bb9 \uff0c \u76ee \u7684 \u662f \u8981 \u91dd \u5c0d \u6587 \u4ef6 \u5167 \u5bb9 d j \uff0c \u5229 \u7528 \u56de \u994b \u7684 \u8cc7 \u8a0a \u53bb \u8abf \u51fa \u6700 \u9069 \u7576 \u7684 \u6587 \u4ef6 \u8a9e \u8a00 \u6a21 \u578b \uff0c \u56e0 \u6b64 \u6700 \u5f8c \u4f9d \u7167 \u6211 \u5011 \u6240 \u9078 \u64c7 \u4e4b \u6a19 \u6e96 \u53bb \u627e \u51fa \u9069 \u7576 \u7684 \u5408 \u4f75 \u53c3 \u6578 \u3002 \u7d9c \u5408 \u4e0a \u8ff0 \u4e09 \u9ede \u53ca \u539f \u672c \u7684 \u60f3 \u6cd5 \uff0c \u6211 \u5011 \u5f97 \u5230 \u4ee5 \u4e0b \u7684 \u5f0f \u5b50 \uff1a ) | ( ... ) | ( ) | ( ) | ( ) | ( , 2 2 , 1 1 , 0 , N t N", | |
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| { | |
| "text": "EQUATION", | |
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| "text": "EQUATION", | |
| "ref_id": "EQREF", | |
| "raw_str": "\u6b64 \u5f0f \u5c0d \u539f \u6aa2 \u7d22 \u6a21 \u578b \u4e4b \u5f71 \u97ff \u5982 \u5716 \u516b \uff0c \u5716 \u4e2d } , , { 4 1 \u03bb \u03bb K \u662f \u6df7 \u5408 \u5f0f \u6aa2 \u7d22 \u6a21 \u578b \u7684 \u53c3 \u6578 \uff0c \u662f \u5728 \u5efa \u7acb \u6df7 \u5408 \u5f0f \u6a5f \u7387 \u6a21 \u578b \u6642 \u5c31 \u5df2 \u7d93 \u8a08 \u7b97 \u597d \u4e86 \uff0c \u9019 \u88e1 \u662f \u5f37 \u8abf \u5728 \u505a \u6a21 \u578b \u53c3 \u6578 ) | ( j t d q P \u4e4b \u8abf \u6574 \u3002 \u82e5 \u5c07 d j \u7576 \u6210 0 d ,\u7d50\u5408\u524d N \u540d \u6587 \u4ef6 N d d d, ,", | |
| "eq_num": ", 2 1 L" | |
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| "text": "\uff0c \u65bc \u662f \u6b64 \u5f0f \u53ef \u8f49 \u63db \u70ba \u2211 = = N k k t k j j t d q P m d q P 0 , ) | ( ) | ( (15) \u5716 \u4e03 \u3001 \u6df7 \u5408 \u5f0f \u6a5f \u7387 \u6a21 \u578b \u4e4b \u8abf \u6574 A.\u6700\u4f73\u76f8\u4f3c\u5ea6\u4f30\u6e2c \u82e5 \u4f7f \u7528 \u6700 \u4f73 \u76f8 \u4f3c \u5ea6 ( Maximum Likelihood\uff0cML)\u4f30\u6e2c\u6cd5\u5247\uff0c\u5176\u6700\u4f73\u53c3\u6578 ML j M \u8a08 \u7b97 \u5982 \u4e0b [17] ) , | ( max arg j j M ML j M D Q P M j = (16) \u5728 \u6b64 1 0 , = \u2211 = N k k j m \u70ba \u4e00 \u9650 \u5236 ( Constraint) \u3002 \u6211 \u5011 \u5fc5 \u9808 \u57f7 \u884c \u6709 \u9650 \u5236 \u7684 \u6700 \u4f73 \u5316 ( Constraint Optimization) \uff0c \u5229 \u7528 \u6587 \u4ef6 \u672c \u8eab \u8207 \u56de \u994b \u4e4b \u6587 \u4ef6 \u8abf \u6574 \u51fa \u4e00 \u500b \u66f4 \u7b26 \u5408 \u8a72 \u6587 \u4ef6 \u4e4b \u6a21 \u578b \u51fa \u4f86 \uff0c \u56e0 \u70ba \u53c3 \u6578 M j \u672a \u77e5 \uff0c \u5df2 \u77e5 \u7684 \u89c0 \u5bdf \u8cc7 \u6599 \u70ba \u6587 \u4ef6 \u96c6 \u5408 \u8207 \u8a9e \u8a00 \u6a21 \u578b \u96c6 \u5408 \uff0c \u8cc7 \u6599 \u4e26 \u4e0d \u5b8c \u5168 \uff0c \u6240 \u4ee5 \u4f9d \u7167 EM \u6f14 \u7b97 \u6cd5 \u53bb \u63a8 \u51fa \u5408 \u4f75 \u53c3 \u6578 \u7684 \u5f0f \u5b50 \uff0c \u5176 \u7d50 \u679c \u5982 \u4e0b", | |
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| "text": "\u96d6 \u7136 \u4f7f \u7528 \u6700 \u4f73 \u76f8 \u4f3c \u5ea6 \u70ba \u6a19 \u6e96 \u53ef \u4f30 \u51fa \u4e00 \u7d44 \u53c3 \u6578 \u53bb \u8abf \u6574 \u6587 \u4ef6 \u7684 \u8a9e \u8a00 \u6a21 \u578b \uff0c \u4e0d \u904e \u4ee5 \u6700 \u4f73 \u4e8b \u5f8c \u6a5f \u7387 ( Maximum a Posteriori\uff0cMAP)\u70ba\u6a19\u6e96\uff0c\u548c ML \u6bd4 \u8d77 \u4f86 \uff0c \u5728 \u4f30 \u6e2c \u904e \u7a0b \u4e2d \u591a \u52a0 \u5165 \u4e86 \u4e8b \u524d \u6a5f \u7387 \u901a \u5e38 \u662f \u6709 \u52a9 \u65bc \u5728 \u7a00 \u758f ( Sparse)\u8cc7 \u6599 \u689d \u4ef6 \u4e0b \u7684 \u4f30 \u6e2c [7] \u3002 \u5728 \u9032 \u884c MAP \u7684 \u63a8 \u5c0e \u4e4b \u524d \uff0c \u6211 \u5011 \u5b9a \u7fa9 \u6240 \u9700 \u7684 \u53c3 \u6578 \u2126 j \u5982 \u4e0b \uff0c } 1 , 0 ), | ( , { , Q t N k d q P m k t k j j \u2264 \u2264 \u2264 \u2264 = \u2126 ) ( ) , | ( max arg ) , | ( max arg j j j j j MAP j g D Q P D Q g j j \u2126 \u2126 = \u2126 = \u2126 \u2126 \u2126 (18) \u5176 \u4e2d ) ( j g \u2126 \u662f \u53c3 \u6578 \u2126 j \u7684 \u4e8b \u524d \u6a5f \u7387 \uff0c \u6211 \u5011 \u5047 \u8a2d \u70ba Dirichlet \u6a5f \u7387 \u5206 \u4f48 \uff0c \u800c j \u662f \u6307 \u76ee \u524d \u67e5 \u8a62 \u5230 \u7b2c j \u7bc7 \u6587 \u4ef6 d j \u3002 \u4e8b \u524d \u6a5f \u7387 ) ( j g \u2126 \u5982 \u4e0b \u6240 \u793a \u220f \u220f = = \u2212 \u2212 \u221d \u2126 N k Q t l k t v k j j t k j k j d q P m g 0 | | 1 1 1 , , , , ) | ( ) ( (19) k j v , \u548c t k j l , , \u662f Dirichlet \u6a5f \u7387 \u5206 \u4f48 \u7684 Hyperparameter\u3002k \u4ee3 \u8868 \u56de \u994b \u6587 \u4ef6 \u7684 \u7de8 \u865f \uff0c k=0 \u6642 \uff0c \u4ee3 \u8868 \u8cc7 \u6599 \u5eab \u88e1 \u6b63 \u88ab \u67e5 \u8a62 \u5230 \u7684 \u6587 \u4ef6 \uff0c N k , , 1 L = \u70ba \u524d \u4e00 \u56de \u627e \u51fa \u6392 \u540d \u524d N \u7684 \u6587 \u4ef6 \u3002 \u91dd \u5c0d \u6df7 \u5408 \u53c3 \u6578 k j m , \u63a8 \u5c0e \u51fa \u4f86 \u7684 \u7d50 \u679c \u70ba \u2211", | |
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| "text": "EQUATION", | |
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| "start": 0, | |
| "end": 8, | |
| "text": "EQUATION", | |
| "ref_id": "EQREF", | |
| "raw_str": ") | ( ) | ( ) 1 ( ) | ( ) | ( ) | ( Q v v k j N l l v l j k v k j k v t k j N l l t l j k t k j k t k t MAP l d q P m d q P m n l d q P m d q P m n d q P (21) \u5176 \u4e2d k t n , \u70ba \u8a5e \u7d44 t q \u5728 \u7b2c k \u500b \u6df7 \u5408 \u6578 \u51fa \u73fe \u7684 \u6b21 \u6578 \u3002 C. Hyperparameter \u7684 \u521d \u59cb \u5316 \u8207 \u66f4 \u65b0 \u65b9 \u5f0f \u5728 Hyperparameter \u7684 \u521d \u59cb \u5316 \u7684 \u90e8 \u5206 \uff0c \u6211 \u5011 \u53c3 \u8003 [10]\u4e26\u63a1\u7528\u4ee5\u4e0b\u7684\u516c\u5f0f\u505a\u521d\u59cb\u5316 k j k j m v , ) 0 ( , 1 \u22c5 + = \u03b5 (22) ) | ( 1 ) 0 ( , , k t t k j d q P l \u22c5 + = \u03b5 (23) \u5176 \u4e2d k j m , \u53ca ) | ( k t d q P \u7684 \u8a08 \u7b97 \u65b9 \u5f0f \u662f \u5c07 \u8a13 \u7df4 \u8cc7 \u6599 \u4f30 \u6e2c \u51fa \u4f86 \u7684 \u6700 \u4f73 \u76f8 \u4f3c \u5ea6 \u503c ML k j m , \u53ca ) | ( k t ML d q P \uff0c \u9032 \u884c \u53d6 \u5e73 \u5747 \u503c \u7684 \u904b \u7b97 \u800c \u5f97 \u5230 \u7684 \u3002 1 0 < < \u03b5 \u662f \u4e00 \u500b \u52a0 \u6b0a \u7684 \u4fc2 \u6578 \uff0c \u76ee \u7684 \u662f \u53bb \u8abf \u6574 \u4e8b \u524d \u8cc7 \u6599 \u7684 \u6b0a \u91cd \u3002 \u800c Hyperparameter \u7684 \u66f4 \u65b0 \u516c \u5f0f \u662f \u6839 \u64da Dirichlet \u4e8b \u524d \u6a5f \u7387 \u5206 \u5e03 \u662f \u5c6c \u65bc Conjugate Prior \u7684 \u7279 \u6027 \u63a8 \u5c0e \u51fa \u5982 \u4e0b \u7684 \u7d50 \u679c [10] \u2211 \u2211 = = + = | | 1 0 , , , , ) | ( ) | ( Q t N l l t l j j t k j old k j new k j d q P m d q P m v v", | |
| "eq_num": "(24)" | |
| } | |
| ], | |
| "section": "", | |
| "sec_num": null | |
| }, | |
| { | |
| "text": "\u2211 = + = N l l t l j j t k j old t k j new t k j d q P m d q P m l l 0 , , , , , , ) | ( ) | ( (25) \u628a \u524d \u4e00 \u6b21 \u905e \u8ff4 \u7b97 \u51fa Hyperparameter \u7684 old k j v , \u53ca old t k j l , , \uff0c \u7528 \u6b64 \u516c \u5f0f \u66f4 \u65b0 \u5230 new k j v , \u53ca new t k j l , , \u3002 4. \u5be6\u9a57 4.1 \u5be6 \u9a57 \u74b0 \u5883 -\u65b7\u8a5e\u5de5\u5177\u8207\u5be6\u9a57\u6587\u96c6\u8aaa\u660e \u70ba \u4e86 \u5c07 \u672c \u8ad6 \u6587 \u65b9 \u6cd5 \u5be6 \u73fe \u5728 \u4e2d \u6587 \u65b0 \u805e \u8cc7 \u8a0a \u6aa2 \u7d22 \u7cfb \u7d71 \u4e2d \uff0c \u9996 \u5148 \u5fc5 \u9808 \u88fd \u4f5c \u4e86 \u4e00 \u5957 \u8a5e \u5178 \uff0c \u9019 \u500b \u8a5e \u5178 \u4e4b \u529f \u7528 \u662f \u70ba \u4e86 \u80fd \u5c07 \u6587 \u4ef6 \u88e1 \u5f97 \u53e5 \u5b50 \u65b7 \u6210 \u66f4 \u5c0f \u7684 \u8a5e \u55ae \u4f4d \uff0c \u540c \u6642 \u5c07 \u6bcf \u4e00 \u500b \u65b7 \u51fa \u4f86 \u7684 \u8a5e \u8f49 \u6210 \u8a5e \u5178 \u4e2d \u5c0d \u61c9 \u7684 \u7de8 \u865f \uff0c \u8a5e \u5178 \u4e2d \u4e3b \u8981 \u90e8 \u5206 \u662f \u4f86 \u81ea CKIP (Chinese Knowledge Information Processing)\u4e2d\u6587\u8a5e\u5eab[18]\uff0c\u4e3b\u8981\u662f\u5229\u7528\u570b\u8a9e\u65e5\u5831\u8fad\u5178\u4e2d\u7d04\u56db\u842c\u76ee\u8a5e\u7684\u539f\u59cb\u8cc7 \u6599 \u52a0 \u4ee5 \u5206 \u985e \uff0c \u4e26 \u4e14 \u9644 \u52a0 \u90e8 \u5206 \u7684 \u8a9e \u6cd5 \u53ca \u8a9e \u610f \u8a0a \u606f \u5728 \u5176 \u4e2d \uff0c \u4f46 \u5728 \u672c \u8ad6 \u6587 \uff0c \u53ea \u4f7f \u7528 \u5230 \u8a5e \u51fa \u73fe \u7684 \u983b \u7387 \uff0c \u4e26 \u7121 \u4f7f \u7528 \u5230 \u8a9e \u6cd5 \u8207 \u8a9e \u610f \u8cc7 \u8a0a \uff0c \u6211 \u5011 \u53ea \u6709 \u53d6 \u51fa \u5176 \u4e2d \u4e00 \u3001 \u4e8c \u3001 \u4e09 \u3001 \u56db \u8a5e \u7684 \u90e8 \u5206 \u4f5c \u70ba \u57fa \u672c \u8fad \u5178 \u3002 \u5be6 \u9a57 \u904e \u7a0b \u6240 \u4f7f \u7528 \u7684 \u6587 \u96c6 \u70ba", | |
| "cite_spans": [], | |
| "ref_spans": [], | |
| "eq_spans": [], | |
| "section": "", | |
| "sec_num": null | |
| }, | |
| { | |
| "text": "\u7bc7 \u897f \u5143 1998 \u5e74 1 \u6708 1 \u65e5 \u5230 6 \u6708 30 \u65e5 \u7684 \u65b0 \u805e \uff0c \u7e3d \u5171 \u6709 20 \u500b \u4e3b \u984c \uff0c 1,183 \u7bc7 \u65b0 \u805e \u6587 \u4ef6 \uff0c \u5269 \u4e0b 9,978 \u7bc7 \u7121 \u6a19 \u51fa \u4e3b \u984c \u6587 \u4ef6 \uff0c \u5f9e \u5176 \u4e2d \u53d6 \u51fa 4,815 \u7bc7 \u4f86 \u7b97 \u51fa \u6aa2 \u7d22 \u6a21 \u578b \u4e2d \u6240 \u9700 \u8981 \u7684 \u80cc \u666f \u8a9e \u8a00 \u6a21 \u578b \uff0c \u7531 \u65bc \u6211 \u5011 \u6240 \u4f7f \u7528 \u4e4b \u65b0 \u83ef \u793e \u65b0 \u805e \u4e26 \u7121 \u7d93 \u904e \u5206 \u985e ( \u570b \u969b \u3001 \u653f \u6cbb \u3001 \u8ca1 \u7d93 \u53ca \u9ad4 \u80b2 \u2026\u7b49\u985e\u5225) \uff0c \u70ba \u4e86 \u4fdd \u6301 \u80cc \u666f \u8a9e \u8a00 \u6a21 \u578b \u4e4b \u5e73 \u8861 \u6027 \uff0c \u91dd \u5c0d \u6bcf \u6708 \u6bcf \u65e5 \u4e4b \u65b0 \u805e \u4ee5 \u96a8 \u6a5f \u65b9 \u5f0f \u62bd \u51fa \uff0c \u5e73 \u5747 \u6bcf \u6708 \u53d6 \u516b \u767e \u7bc7 \u6587 \u4ef6 \u3002 \u6a19 \u660e \u4e3b \u984c \u4e4b 1,183 \u7bc7 \u6587 \u4ef6 \u8207 \u5c1a \u672a \u4f7f \u7528 \u7121 \u6a19 \u4e3b \u984c \u7684", | |
| "cite_spans": [], | |
| "ref_spans": [], | |
| "eq_spans": [], | |
| "section": "", | |
| "sec_num": null | |
| }, | |
| { | |
| "text": "\u672c \u5be6 \u9a57 \u6bd4 \u8f03 \u5404 \u8cc7 \u8a0a \u56de \u994b \u6f14 \u7b97 \u6cd5 \u4e4b \u6548 \u679c \uff0c \u5f9e \u5716 \u8868 \u4e2d \u53ef \u4ee5 \u770b \u51fa \u5404 \u65b9 \u6cd5 \u5c0d \u65bc \u6aa2 \u7d22 \u4e4b \u6e96 \u78ba \u5ea6 \u7686 \u6709 \u63d0 \u6607 \u3002 \u5728 \u67e5 \u8a62 \u8a5e \u6b0a \u91cd \u91cd \u8abf \u6574 \u65b9 \u9762 \uff0c \u6bd4 \u8f03 QTR\u3001QTR+QE \u8207 QTR+MA \u9019 \u4e09 \u7d44 \u5be6 \u9a57 \u767c \u73fe \uff0c \u8a5e \u6b0a \u91cd \u4e4b \u8abf \u6574 \u96d6 \u7136 \u55ae \u7368 \u4f7f \u7528 \u4e4b \u6539 \u5584 \u4e0d \u751a \u660e \u986f \uff0c \u4f46 \u662f \u82e5 \u6709 \u8f03 \u597d \u7684 \u8a9e \u8a00 \u6a21 \u578b \u8abf \u6574 \uff0c \u5247 \u6aa2 \u7d22 \u6548 \u679c \u7684 \u63d0 \u6607 \u6703 \u66f4 \u986f \u8457 \u3002 \u6b64 \u5916 \uff0c \u6211 \u5011 \u5c0d \u5404 QTR\u3001QE \u8207 MA \u9019 \u4e09 \u7a2e \u65b9 \u5f0f \u505a \u4e0d \u540c \u7684 \u5408 \u4f75 \uff0c \u4ea6 \u6709 \u4e0d \u540c \u4e4b \u63d0 \u6607 \u6548 \u679c \u986f \u73fe \u51fa \u4f86 \uff0c \u800c \u5168 \u90e8 \u5408 \u4f75 \u6642 \uff0c \u6aa2 \u7d22 \u4e4b \u6e96 \u78ba \u5ea6 \u63d0 \u6607 \u6700 \u591a \u3002 \u63a5 \u4e0b \u4f86 \uff0c \u6bd4 \u8f03 \u6587 \u4ef6 \u6a21 \u578b \u8abf \u6574 \u6642 \u4f7f \u7528 ML \u8207 MAP \u4e4b \u6548 \u679c \uff0c \u6211 \u5011 \u4ee5 QTR\u3001QE \u8207 MA \u4e09 \u8005 \u5408 \u4f75 \u4e4b \u5be6 \u9a57 \u4f86 \u6bd4 \u8f03 \u3002 \u8868 \u4e8c \u3001 \u6df7 \u5408 \u5f0f \u6a5f \u7387 \u6aa2 \u7d22 \u6a21 \u578b \u8abf \u6574 \u4f7f \u7528 ML \u53ca MAP \u4e4b \u5be6 \u9a57 \u7d50 \u679c \u6bd4 \u8f03 \u56de \u994b \u65b9 \u5f0f ALL (ML) ALL (MAP) NAP (%) 81.1 82.4 \u5f9e \u4e0a \u8868 \u4e2d \u53ef \u4ee5 \u770b \u51fa \u5728 \u6539 \u7528 MAP \u53bb \u8abf \u6574 \u6587 \u4ef6 \u6a21 \u578b \u5f8c \uff0c \u5176 \u6aa2 \u7d22 \u6548 \u679c \u7684 \u78ba \u6709 \u6539 \u9032 \u3002 B.\u4e0d\u540c\u8cc7\u8a0a\u56de\u994b\u91cf\u4e4b\u5f71\u97ff \u672c \u90e8 \u5206 \u5be6 \u9a57 \u5c07 \u8a2d \u5b9a \u4e0d \u540c \u4e4b \u67e5 \u8a62 \u8a5e \u589e \u52a0 \u6578 \u8207 \u56de \u994b \u6642 \u7684 \u6587 \u4ef6 \u6578 \uff0c \u4e26 \u4e14 \u91dd \u5c0d \u6587 \u4ef6 \u6a21 \u578b \u8abf \u6574 \u7684 ML \u8207 MAP \u505a \u6bd4 \u8f03 \uff0c \u540c \u6a23 \u5730 \uff0c \u5be6 \u9a57 \u662f \u4ee5 \u4e09 \u8005 \u5408 \u4f75 (ALL)\u7684\u6548\u679c\u4f86\u89c0\u5bdf\u3002 \u8868 \u4e09 \u3001 \u4e0d \u540c \u8cc7 \u8a0a \u56de \u994b \u91cf \u4e4b \u5be6 \u9a57 \u7d50 \u679c \u6bd4 \u8f03 \u56de \u994b \u65b9 \u5f0f ML(K=10, N=6) ML(K=10, N=10) ML(K=6, N=10) MAP(K=6, N=10) NAP (%) 80.7 81.3 82 83.5 \u8868 \u4e2d K \u662f \u6307 \u67e5 \u8a62 \u53e5 \u64f4 \u5145 \u88e1 \uff0c \u7b97 \u5b8c \u8a5e \u5206 \u6578 \u5f8c \u6240 \u6311 \u9078 \u7684 \u8a5e \u6578 \u91cf \uff1b N \u662f \u6307 \u4f7f \u7528 \u65bc \u56de \u994b \u7a0b \u5e8f \u4e2d \u7684 \u6587 \u4ef6 \u6578 \u3002 \u6211 \u5011 \u5f88 \u660e \u986f \u7684 \u770b \u51fa \uff0c \u589e \u52a0 \u8a5e \u7684 \u500b \u6578 \uff0c \u9020 \u6210 \u4e0d \u9069 \u7576 \u7684 \u8a5e \u52a0 \u9032 \u67e5 \u8a62 \u53e5 \u7684 \u6a5f \u6703 \u63d0 \u6607 \uff0c \u5982 \u6b64 \u6703 \u9020 \u6210 \u6aa2 \u7d22 \u6548 \u679c \u7684 \u964d \u4f4e \uff1b \u800c \u63d0 \u6607 \u56de \u994b \u4e4b \u6587 \u4ef6 \u6578 \uff0c \u53ef \u4ee5 \u88dc \u5145 \u66f4 \u591a \u7684 \u8cc7 \u8a0a \u65bc \u7cfb \u7d71 \u5167 \uff0c \u4e26 \u9032 \u4e00 \u6b65 \u5730 \u63d0 \u9ad8 \u6aa2 \u7d22 \u6548 \u80fd \u3002 C. MAP \u8abf \u6574 \u4e4b \u4e0d \u540c \u53c3 \u6578 \u521d \u59cb \u6bd4 \u8f03 \u5728 \u8c9d \u6c0f \u7684 \u6587 \u4ef6 \u6a21 \u578b \u8abf \u6574 \u4e2d \uff0c \u5c0d \u65bc Hyper parameter \u7684 \u521d \u59cb \uff0c \u9700 \u4f7f \u7528 \u4e00 \u4fc2 \u6578 \u03b5 \u505a \u8abf \u6574 \uff0c \u5176 \u7bc4 \u570d 1 0 < < \u03b5 \uff0c \u6211 \u5011 \u91dd \u5c0d \u4e0d \u540c \u7684 \u03b5 \uff0c \u4ee5 \u5408 \u4f75 QTR\u3001QE \u8207 MA \u7684 \u5be6 \u9a57 \u7d50 \u679c \u627e \u51fa \u53ef \u80fd \u6700 \u4f73 \u503c \u3002 \u8868 \u56db \u3001 \u4e0d \u540c \u03b5 \u503c \u4e4b \u5be6 \u9a57 \u7d50 \u679c \u6bd4 \u8f03 \u03b5 0.2 0", | |
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| "eq_spans": [], | |
| "section": "", | |
| "sec_num": null | |
| }, | |
| { | |
| "text": "\u7531 \u8868 \u4e2d \u7684 \u7d50 \u679c \u53ef \u770b \u51fa \uff0c \u4e0d \u540c \u7684 \u4fc2 \u6578 \u96d6 \u7136 \u7d50 \u679c \u4e0d \u540c \uff0c \u4f46 \u76f8 \u5dee \u91cf \u662f \u5f88 \u5c11 \u7684 \uff0c \u4e0d \u904e \u5728 \u5176 \u4ed6 \u7684 \u5be6 \u9a57 \u6bd4 \u8f03 \u4e2d \uff0c \u4ecd \u4ee5 \u03b5 = 0 . 2 \u70ba \u4e3b \u3002 D.\u8f03\u77ed\u67e5\u8a62\u53e5\u8207\u8f03\u9577\u67e5\u8a62\u53e5\u4e4b\u6bd4\u8f03 \u5728 \u9019 \u4e00 \u5c0f \u7bc0 \u88e1 \uff0c \u6211 \u5011 \u5c07 \u5be6 \u9a57 \u6a23 \u672c \u7684 \u9577 \u5ea6 \u5206 \u6210 \u5169 \u7fa4 \uff0c \u6bcf \u4e00 \u6a23 \u672c \u5927 \u65bc 15 \u500b \u4e2d \u6587 \u5b57 \u7684 \u5206 \u6210 \u4e00 \u7fa4 \uff0c \u5c0f \u65bc \u6216 \u7b49 \u65bc \u5341 \u4e94 \u500b \u5b57 \u7684 \u5206 \u6210 \u53e6 \u4e00 \u7fa4 \uff0c \u4ee5 \u89c0 \u5bdf \u4e0d \u540c \u9577 \u5ea6 \u5c0d \u5be6 \u9a57 \u7d50 \u679c \u4e4b \u5f71 \u97ff \uff0c \u540c \u6a23 \u4ee5 QTR\u3001QE \u8207 MA \u5408 \u4f75 \u7684 \u5be6 \u9a57 \u89c0 \u5bdf \u3002 \u8868 \u4e94 \u3001 \u9577 \u53e5 \u8207 \u77ed \u53e5 \u4e4b \u5be6 \u9a57 \u7d50 \u679c ( NAP(%) ) \u6bd4 \u8f03 \u5e73 \u5747 \u9577 \u5ea6 (\u5b57) \u57fa \u672c \u7cfb \u7d71 \u672c \u8ad6 \u6587 \u65b9 \u6cd5", | |
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| "section": "", | |
| "sec_num": null | |
| }, | |
| { | |
| "text": "\u5f9e \u8868 \u4e2d \u770b \u51fa \uff0c \u8f03 \u9577 \u67e5 \u8a62 \u53e5 \u53ef \u7528 \u7684 \u8cc7 \u8a0a \u91cf \u5305 \u542b \u8f03 \u591a \uff0c \u6240 \u4ee5 \u5728 \u57fa \u672c \u7cfb \u7d71 \u53ef \u8868 \u73fe \u8f03 \u597d \uff0c \u4f46 \u662f \u540c \u6642 \u53c3 \u96dc \u4e86 \u4e00 \u4e9b \u591a \u9918 \u5b57 \u51fa \u73fe \uff0c \u6240 \u4ee5 \u5728 \u56de \u994b \u4e4b \u5f8c \u7684 \u6548 \u679c \u5bb9 \u6613 \u4f4e \u65bc \u8f03 \u77ed \u7684 \u67e5 \u8a62 \u53e5 \uff0c \u4e0d \u904e \uff0c \u5728 \u9019 \u4e9b \u5be6 \u9a57 \u4e2d \u767c \u73fe \u5230 \uff0c \u6aa2 \u7d22 \u6700 \u5f8c \u6548 \u679c \u7684 \u597d \u58de \u4e0d \u5728 \u65bc \u67e5 \u8a0a \u53e5 \u7684 \u77ed \u6216 \u9577 \uff0c \u4f7f \u7528 \u8005 \u6240 \u4e0b \u7684 \u67e5 \u8a62 \u53e5 \uff0c \u5176 \u610f \u601d \u7684 \u8868 \u9054 \u662f \u5426 \u660e \u78ba \uff0c \u624d \u662f \u6aa2 \u7d22 \u6548 \u679c \u7684 \u95dc \u9375 \u3002 E.\u81fa\u7063\u96fb\u5b50\u5831\u4e4b\u5be6\u9a57\u7d50\u679c \u672c \u5c0f \u7bc0 \u5be6 \u9a57 \u76ee \u7684 \u5728 \u505a \u4e00 \u7d44 \u5c0d \u7167 \u7684 \u7d50 \u679c \uff0c \u5176 \u8cc7 \u6599 \u4f86 \u6e90 \u70ba YAHOO \u5947 \u6469 \u7db2 \u7ad9 \u4e0a \u641c \u5f97 \u4e4b \u96fb \u5b50 \u5831 \uff0c \u4f5c \u70ba \u88ab \u67e5 \u8a62 \u7684 \u65b0 \u805e \u6587 \u4ef6 \u5176 \u7bc4 \u570d \u5f9e \u897f \u5143 2002 \u5e74 1 \u6708 25 \u65e5 \u81f3 5 \u6708 21 \u65e5 \u8207 \u897f \u5143 2002 \u5e74 11 \u6708 12 \u65e5 \u81f3 \u897f \u5143 2003 \u5e74 1 \u6708 11 \u65e5 \u7e3d \u5171 \u6709 7,800 \u7bc7 \uff0c \u4e26 \u53d6 \u51fa 110 \u65b0 \u805e \u6587 \u4ef6 \u4e4b \u6a19 \u984c \u4f5c \u70ba \u67e5 \u8a62 \u53e5 \u4e4b \u6a23 \u672c \uff0c \u80cc \u666f \u8a9e \u8a00 \u6a21 \u578b \u70ba CKIP \u5e73 \u8861 \u8a9e \u6599 \u5eab \u3002 \u8868 \u516d \u3001 \u81fa \u7063 \u96fb \u5b50 \u5831 \u5be6 \u9a57 \u7d50 \u679c \u56de \u994b \u65b9 \u5f0f \u57fa \u672c \u7cfb", | |
| "cite_spans": [], | |
| "ref_spans": [], | |
| "eq_spans": [], | |
| "section": "", | |
| "sec_num": null | |
| } | |
| ], | |
| "back_matter": [], | |
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| "TABREF6": { | |
| "type_str": "table", | |
| "content": "<table><tr><td/><td colspan=\"4\">NAP (%) 85.3</td><td>\u7d71</td><td colspan=\"16\">QTR MA QE QTR+QE QTR+MA QE+MA ALL 84.0 89.5 91.1 90.4 91.6 92.8 93.7</td><td/><td colspan=\"4\">ALL (MAP) 93.8</td><td/><td/><td/></tr><tr><td>\u5f9e \u7a2e \u662f</td><td>\u5be6 \u6587 \u5dee \u4e0d \u9a57 \u96c6 \u591a \u7d50 \u679c \u4e4b \u66f8 \u7684 \u3002 \u53ef \u5beb</td><td>\u4ee5 \u770b \u8868 \u9054</td><td>\u51fa \u65b9</td><td>\u5169 \u7a2e \u5f0f \u6709</td><td>\u5be6 \u9a57 \u5f88 \u591a</td><td>\u6587 \u5dee</td><td>\u96c6 \u7570</td><td>\u7684 \u5dee \u7684 \u5b58</td><td>\u7570 \u5728</td><td>\uff0c \u9019 \uff0c \u4ea4</td><td>\u662f \u4e92</td><td>\u56e0 \u70ba \u5f71 \u97ff</td><td>\u5be6 \u9a57 \u6240 \u9020</td><td>\u8cc7 \u6210</td><td>\u6599 \u7684</td><td>\u53ea \u5229 \u7d50 \u679c</td><td>\u7528 \u3002</td><td>\u8a5e \u5178 \u96d6 \u7136</td><td>\u53bb \u5982</td><td>\u65b7 \u8a5e \u6b64 \uff0c</td><td>\uff0c \u4e26 \u4f46 \u672c</td><td>\u7121 \u65b9</td><td>\u505a \u6cd5</td><td>\u5176 \u4ed6 \u4e4b \u6548</td><td>\u7684 \u679c</td><td>\u8655 \u7406 \u5927 \u81f4</td><td>\uff0c \u4e0a</td><td>\u4e26 \u4e14 \u7684 \u8868</td><td>\u5169 \u73fe</td></tr><tr><td colspan=\"30\">5. \u7d50\u8ad6\u8207\u672a\u4f86\u7814\u7a76\u65b9\u5411 \u672c \u8ad6 \u6587 \u65bc \u6df7 \u5408 \u5f0f \u6aa2 \u7d22 \u7684 \u67b6 \u591a \uff1b \u6b64 \u5916 \uff0c \u5728 \u5be6 \u9a57 \u4e2d \u767c \u73fe \u5230 \uff0c \u6aa2 \u69cb \u7d22 \u4e0a \u7cfb \u7814 \u7d71 \u7a76 \u7684 \u76f8 \u95dc \u95dc \u9375 \u8cc7 \u6709 \u8a0a \u4e8c \u56de \uff1a \u994b \u6587 \u7684 \u4ef6 \u6548 \u6a21 \u679c \u578b \uff0c \u7684 \u4e26 \u597d \u8b49 \u58de \u660e \u8207 \u6211 \u76f8 \u5011 \u95dc \u7684 \u6587 \u65b9 \u4ef6 \u6cd5 \u7684 \u53ef \u56de \u4f7f \u994b \u6aa2 \u6578 \u7d22 \uff1b \u4e4b \u7576 \u6700 \u6211 \u5f8c \u5011 \u6548 \u8abf \u80fd \u51fa \u63d0 \u8f03 \u597d \u6607 \u6587 \u4ef6 \u6a21 \u578b \u6642 \uff0c \u5c0d \u65bc \u67e5 \u8a62 \u8a5e \u6b0a \u91cd \u3001 \u67e5 \u8a62 \u53e5 \u64f4 \u5145 \u6216 \u8005 \u662f \u5408 \u4f75 \u4f86 \u6aa2 \u7d22 \uff0c \u7d50 \u679c \u90fd \u6703 \u66f4 \u52a0 \u512a \u79c0 \uff1b \u76f8 \u95dc \u6587 \u4ef6 \u7684 \u56de \u994b \u6578 \u91cf \u589e \u6642 \uff0c \u80fd \u5920 \u88dc \u5145 \u7684 \u8cc7 \u8a0a \u4e5f \u6703 \u76f8 \u5c0d \u7684 \u589e \u52a0 \uff0c \u9019 \u6709 \u52a9 \u65bc \u6aa2 \u7d22 \u6548 \u679c \u7684 \u63d0 \u6607 \u3002 \u6587 \u4ef6 \u6a21 \u578b \u7684 \u8abf \u6574 \u65b9 \u9762 \uff0c \u6211 \u5011 \u5f9e \u5be6 \u9a57 \u4e2d \u767c \u73fe MAP \u9019 \u7a2e \u52a0 \u5165 \u4e8b \u524d \u8cc7 \u8a0a \u7684 \u6e96 \u5247 \u6bd4 \u4f7f \u7528 ML \u7684 \u6e96 \u78ba \u5ea6 \u591a \u67e5 \u8a62 \u53e5 \u64f4 \u5145 \u65b9 \u9762 \uff0c \u6211 \u5011 \u5f9e \u5be6 \u9a57 \u767c \u73fe \u5230 \"\u56de\u994b\u6709\u5982\u5169\u9762\u5203\" \u9019 \u500b \u4e8b \u5be6 \uff0c \u7576 \u52a0 \u5165 \u67e5 \u8a62 \u53e5 \u7684 \u8a5e \u7121 \u6cd5 \u63a7 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\u7684 \u8e10 \u51fa \u51fa 1.33%\u5de6\u53f3\uff0c\u662f\u53ef\u4ee5\u9032\u4e00\u6b65\u5730\u8abf\u51fa\u66f4\u597d\u7684\u6587\u4ef6\u6a21\u578b\u3002\u5728 \u4e86 \u52a0 \u7684 \u78a9 \u58eb \u8ad6 \u6587 , \u6210 \u529f \u5927 \u5b78 \u8cc7 \u8a0a \u5de5 \u7a0b \u5b78 , 2002. \u7cfb [18] \u4e2d \u592e \u7a76 \u9662 \u8cc7 \u8a0a \u79d1 \u5b78 \u7814 \u7a76 \u6240 \u8a5e \u5eab \u5c0f \u7d44 \u3002 [19] Google \u641c \u5c0b \u8aaa \u660e</td></tr></table>", | |
| "num": null, | |
| "text": "CKIP, http://godel.iis.sinica.edu.tw,", | |
| "html": null | |
| } | |
| } | |
| } | |
| } |