{"id":2667,"date":"2022-07-15T01:56:28","date_gmt":"2022-07-14T17:56:28","guid":{"rendered":"https:\/\/www.csslayer.info\/wordpress\/?p=2667"},"modified":"2022-07-15T01:56:28","modified_gmt":"2022-07-14T17:56:28","slug":"libime-intro-2","status":"publish","type":"post","link":"https:\/\/www.csslayer.info\/wordpress\/fcitx-dev\/libime-intro-2\/","title":{"rendered":"libime \u539f\u7406\u4ecb\u7ecd\uff08\u4e8c\uff09"},"content":{"rendered":"\n

\u4e4b\u524d\u7b2c\u4e00\u7bc7<\/a>\u4e3b\u8981\u4ecb\u7ecd\u4e86\u5173\u4e8e beam search \u548c\u8f93\u5165\u5207\u5206\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u4ee5\u53ca\u63d0\u4f9b\u7684\u4e00\u4e9b\u57fa\u7840\u6570\u636e\u7ed3\u6784\u3002\u63a5\u4e0b\u6765\u4e3b\u8981\u7740\u91cd\u8865\u5168\u4ecb\u7ecd\u4e0a\u6b21\u6ca1\u6709\u63d0\u53ca\u7684 UserLanguageModel \u548c HistoryBigram \u7684\u5b9e\u73b0\u7ec6\u8282\u3002<\/p>\n\n\n\n

\u58f0\u660e\uff0c\u672c\u6587\u9700\u8981\u7684\u5f88\u591a\u524d\u7f6e\u77e5\u8bc6\u90fd\u53ef\u4ee5\u5728\u5927\u5b66\u672c\u79d1\u7684\u81ea\u7136\u8bed\u8a00\u5904\u7406\u7c7b\u8bfe\u7a0b\u627e\u5230\uff0c\u5173\u952e\u8bcd\u300c\u7edf\u8ba1\u8bed\u8a00\u6a21\u578b\u300d\uff0c\u300cN-gram\u300d\u3002\u6982\u62ec\u7684\u8bf4\uff0cN-gram\u6a21\u578b\u662f\u5bf9\u73b0\u5b9e\u8bed\u8a00\u7684\u4e0d\u7cbe\u786e\u6982\u62ec\uff0c\u5b83\u4e0d\u5173\u5fc3\u8bed\u6cd5\uff0c\u53ea\u5173\u5fc3\u8bcd\u4e0e\u8bcd\u4e4b\u95f4\u51fa\u73b0\u7684\u9891\u7387\uff0c\u5c3d\u7ba1\u4e0d\u7cbe\u786e\uff0c\u4f46\u5bf9\u4e8e\u8f93\u5165\u6cd5\uff0c\u673a\u5668\u7ffb\u8bd1\uff0c\u8bed\u97f3\u8bc6\u522b\u7b49\u7b49\u9886\u57df\u90fd\u6709\u4e0d\u9519\u7684\u6548\u679c\u3002<\/p>\n\n\n\n

\u9996\u5148\u4e0a\u4e00\u7bc7\u5f53\u4e2d\u63d0\u5230\u4e86\u6211\u4eec\u7684\u8f93\u5165\u6cd5\u7684\u7b97\u6cd5\u6838\u5fc3\u662f N-gram \u548c beam search\u3002\u4e00\u822c\u5bf9\u91c7\u7528\u8fd9\u79cd\u7b97\u6cd5\u7684\u8f93\u5165\u6cd5\u6765\u8bf4\uff0cN\u4f1a\u53d6 3 \u6216\u8005 2\u3002\u53ef\u4ee5\u53d6\u5f97\u6548\u679c\u548c\u5185\u5b58\u5360\u7528\u7684\u5e73\u8861\u3002\u8fd9\u91cc\u59d1\u4e14\u6765\u8bf4\u6211\u4eec\u4e5f\u7ee7\u627f\u4e86\u4e00\u90e8\u5206 Sunpinyin \u7684\u7cbe\u795e\uff0c\u56e0\u4e3a\u6700\u521d\u6700\u521d\u7684\u6570\u636e\u5c31\u662f\u91c7\u7528 Sunpinyin \u4f7f\u7528\u7684 Open-Gram\u3002\u5f53\u7136\u8fd9\u91cc\u987a\u4fbf\u4e00\u63d0\uff0c\u5728\u6700\u65b0\u7684\u7248\u672c\u6211\u4eec\u91cd\u65b0\u7528\u5168\u65b0\u7684\u6570\u636e\u8bad\u7ec3\u4e86\u8bed\u8a00\u6a21\u578b\u3002\u4f46\u4f9d\u7136\u91c7\u7528\u4e86\u548c Sunpinyin \u4e00\u6837\u7684 Trigram\u3002<\/p>\n\n\n\n

HistoryBigram\uff0c\u987e\u540d\u601d\u4e49\uff0c\u662f\u4e00\u4e2a\u5b58\u50a8\u7528\u6237\u8f93\u5165\u7684 Bigram\u3002\u5b83\u5e72\u7684\u4e8b\u60c5\u5176\u5b9e\u975e\u5e38\u4e4b\u7b80\u5355\uff0c\u5c31\u662f\u628a\u7528\u6237\u7684\u8f93\u5165\u7684\u53e5\u5b50\u6839\u636e\u8bcd\u4e00\u6761\u4e00\u6761\u7684\u50a8\u5b58\u8d77\u6765\u3002\u800c\u5728\u5185\u5b58\u4e2d\uff0c\u5b83\u88ab\u5b58\u50a8\u5728 DATrie \u4e2d\u3002\u4f60\u4e5f\u8bb8\u60f3\u95ee\u4e00\u4e2a\u95ee\u9898\uff0c\u5c31\u662f DATrie \u62bd\u8c61\u8d77\u6765\u770b\uff0c\u53ef\u4ee5\u88ab\u770b\u4f5c\u4e00\u4e2a\u5b57\u7b26\u4e32\u5230 4 byte \u6570\u636e\u7684\u6620\u5c04\uff0c\u90a3\u4e48\u5b83\u7a76\u7adf\u662f\u600e\u4e48\u5b58\u50a8 Bigarm \u8fd9\u6837\u6709\u4e24\u4e2a\u7ea7\u522b\u7684 Key \u7684\u6620\u5c04\u8868\u5462\uff1f<\/p>\n\n\n\n

\u7b54\u6848\u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u5c31\u662f\u4f60\u628a Key \u505a\u7279\u6b8a\u7684\u7f16\u7801\u8ba9\u5b83\u80fd\u591f\u627f\u8f7d\u66f4\u591a\u7684\u5185\u5bb9\u3002\u7b80\u5355\u7684\u628a\u4e24\u4e2a\u5b57\u7b26\u4e32\u52a0\u4e00\u4e2a\u5206\u5272\u7b26\u62fc\u6210\u4e00\u4e2a\u5c31\u53ef\u4ee5\u4e86\u3002Bi-gram \u548c Uni-gram \u8ba1\u7b97\u5f97\u5206\u7684\u516c\u5f0f\u4e5f\u662f\u6765\u81ea Sunpinyin \u3002\u6700\u76f4 \u7684\u6765\u8bf4\uff0cBigram \u7684\u6982\u7387\u5e94\u8be5\u662f P(B|A) = Freq(AB) \/ Freq(B) \u4e5f\u5373\u51fa\u73b0 AB \u7684\u6b21\u6570\u9664\u4ee5 A \u51fa\u73b0\u7684\u6b21\u6570\u3002\u5bf9\u4e8e\u6ca1\u6709 AB \u7684\u60c5\u51b5\u53ea\u4f1a\u5f97\u5230 0\u3002\u8fd9\u5bf9\u4e8e\u4e00\u4e2a\u6a21\u578b\u6765\u8bf4\u6548\u679c\u5e76\u4e0d\u597d\uff0c\u8bed\u8a00\u6a21\u578b\u4f1a\u91c7\u53d6\u5e73\u6ed1\uff08Smoothing\uff09\u6765\u4fdd\u8bc1\u5373\u4f7f\u6570\u636e\u5f88\u7a00\u758f\uff08\u7528\u6237\u8f93\u5165\u7684\u5386\u53f2\u662f\u5f88\u5c11\u7684\uff09\uff0c\u4e5f\u80fd\u5f97\u5230\u6709\u610f\u4e49\u7684\u7ed3\u679c\u3002\u8fd9\u91cc\u5c31\u662f\u628a B \u5355\u72ec\u51fa\u73b0\u7684\u6b21\u6570\u4e5f\u62ff\u6765\u505a\u4e00\u4e2a\u52a0\u6743\u5e73\u5747\u3002\u6765\u51cf\u5c11\u56e0\u4e3a\u91c7\u6837\u800c\u5bfc\u81f4\u7684\u6570\u636e\u7f3a\u5931\u3002<\/p>\n\n\n\n

\u800c\u8fd9\u8ddd\u79bb\u5b9e\u9645\u7684\u8f93\u5165\u6cd5\u7684\u60c5\u51b5\uff0c\u8fd8\u6709\u4e24\u4e2a\u95ee\u9898\u4e9f\u5f85\u89e3\u51b3\u30021\u3001\u5982\u4f55\u6df7\u5408\u7cfb\u7edf\u6a21\u578b\u548c\u7528\u6237\u6a21\u578b\uff0c2\u3001\u5982\u4f55\u4fdd\u8bc1\u7528\u6237\u7684\u8f93\u5165\u80fd\u591f\u5feb\u901f\u5728\u6392\u5e8f\u4e0a\u4f53\u73b0\u6548\u679c\u3002<\/p>\n\n\n\n

\u7b2c\u4e00\u4e2a\u95ee\u9898\uff0c\u5c3d\u7ba1\u4e0d\u7cbe\u786e\uff0c\u4f46\u662f\u6211\u4eec\u91c7\u7528\u7684\u65b9\u5f0f\u662f\u4e24\u4e2a\u6982\u7387\u503c\u52a0\u6743\u5e73\u5747\u3002\u5f53\u7136\u8fd9\u91cc\u4e5f\u5c0f\u63d0\u4e00\u4e0b sunpinyin \u7684\u5b9e\u73b0\u3002\u5728\u6700\u521d\u5b9e\u73b0 libime \u7684\u65f6\u5019\uff0c\u5f88\u591a\u5177\u4f53\u7684\u7ec6\u8282\u7684\u65b9\u6848\u90fd\u5c1d\u8bd5\u53c2\u8003\u4e86 sunpinyin \u7684\u505a\u6cd5\uff0c\u4f46\u4e5f\u53d1\u73b0\u4e86 sunpinyin \u5f88\u591a\u300c\u5947\u602a\u7684\u8bbe\u8ba1\u300d\u3002\u4f8b\u5982\u6982\u7387\u503c\u4e3a\u4e86\u51cf\u5c11\u6d6e\u70b9\u6570\u8fd0\u7b97\uff0c\u901a\u7528\u7684\u505a\u6cd5\u90fd\u662f\u91c7\u7528\u5bf9\u6570\u6982\u7387\uff0c\u8fd9\u6837\u6982\u7387\u7684\u4e58\u79ef\u5c31\u662f\u7b80\u5355\u7684\u6c42\u548c\u4e86\uff0c\u6548\u7387\u8981\u9ad8\u7684\u591a\u3002\u4f46 sunpinyin \u7684\u6982\u7387\u6743\u91cd\u5374\u662f\u7528\u5bf9\u5bf9\u6570\u6982\u7387\u8ba1\u7b97\u52a0\u6743\u7684\u7b97\u672f\u5e73\u5747\uff0c\u8fd9\u5c31\u975e\u5e38\u5947\u602a\u4e86\uff08\u5f88\u5947\u602a\u4e5f\u4e0d\u592a\u7b26\u5408\u6570\u5b66\uff09\u3002libime \u8fd9\u91cc\u5c31\u91c7\u7528\u4e86\u81f3\u5c11\u9053\u7406\u4e0a\u66f4\u8bf4\u5f97\u901a\u7684\u539f\u59cb\u6982\u7387\u8ba1\u7b97\u7b97\u672f\u5e73\u5747\u3002\u4e0d\u8fc7\u8fd9\u91cc\u6709\u4e00\u4e2a\u5c0f\u95ee\u9898\uff0c\u5047\u8bbe\u4f60\u6709\u4e86 log(P_sys) \u548c log(P_user) \u600e\u4e48\u8ba1\u7b97 log( w * P_sys + (1 – w) * P_user) \u7684\u95ee\u9898\u3002<\/p>\n\n\n\n

\u5982\u679c\u4f60\u76f4\u63a5\u8ba1\u7b97\u7684\u8bdd\uff0c\u6211\u4eec\u4ee3\u6362\u4e00\u4e0b\u6570\u5b57\u5c31\u53ef\u4ee5\u5f97\u5230 log(a * pow(10, log(P_sys)) + (1 – a) * pow(10, log(P_user)))\uff0c\u603b\u5171\u8c03\u7528\u4e86 3 \u6b21 math \u7684\u51fd\u6570\u3002\u80fd\u4e0d\u80fd\u51cf\u5c11\u4e00\u4e9b\u5462\uff1f\u5176\u5b9e\u662f\u53ef\u4ee5\u7684\u3002<\/p>\n\n\n\n

\u5047\u8bbe\u6211\u4eec\u9700\u8981\u8ba1\u7b97 log10(exp10(a) + exp10(b))\nlog10(exp10(a) + exp10(b))\n   = log10(exp10(b) * (1 + exp10(a - b)))\n   = b + log10(1 + exp10(a - b))\n   = b + log1p(exp10(a - b)) \/ log(10)\n<\/pre>\n\n\n\n
\u5f97\u5230\u4e0a\u9762\u7684\u516c\u5f0f\u4e4b\u540e\uff0c\u4e3a\u4ec0\u4e48\u7279\u610f\u5f04\u51fa log1p(exp10(a-b)) \u7684\u5f62\u5f0f\u5462\uff1f\u662f\u56e0\u4e3a\u6807\u51c6\u5e93\u4e2d\u63d0\u4f9b\u4e86\u8fd9\u6837\u4e00\u4e2a\u51fd\u6570 log1p10exp\uff0c\u53ef\u4ee5\u4e00\u6b65\u5230\u4f4d\u8ba1\u7b97\u8fd9\u4e2a\u6570\u503c\u3002\u4e3a\u4e86\u66f4\u52a0\u7cbe\u786e\uff0c\u53ef\u4ee5\u6839\u636e a b \u76f8\u5bf9\u5927\u5c0f\u6765\u9009\u62e9\u662f a – b \u8fd8\u662f b – a\u3002\u5176\u4e2d log(10) \uff08e\u4e3a\u5e95\uff09\u8fd9\u79cd\u5e38\u6570\u90fd\u53ef\u4ee5\u9884\u5148\u8ba1\u7b97\uff0c\u5c31\u5c06 math \u5e93\u51fd\u6570\u8c03\u7528\u7cbe\u7b80\u5230\u4e86 1 \u6b21\u3002<\/p>\n\n\n\n
\u53ef\u80fd\u4f60\u4f1a\u95ee\uff0c\u539f\u672c\u516c\u5f0f\u7684 w \u548c (1 – w) \u7684\u6743\u91cd\u53bb\u54ea\u4e86\u5462\uff1f\u8fd9\u4e2a\u95ee\u9898\u4e5f\u5f88\u7b80\u5355\uff0c\u4f60\u53ea\u9700\u8981\u628a\u4ed6\u4eec\u5148\u8f6c\u5316\u4e3a\u5bf9\u6570\u8ba1\u7b97\u5373\u53ef\u3002<\/p>\n\n\n\n
log10(w * exp10(log_sys) + \uff081-w) * exp10(log_user))\n   = log10(exp10(log10(w)) * exp10(log_sys) + exp10(log10(1-w)) * exp10(log_user))\n   = log10(exp10(log10(w) + log_sys) + exp10(log10(1-w) + log_user))<\/pre>\n\n\n\n
\u8fd9\u6837\u5c31\u53ef\u4ee5\u5b8c\u7f8e\u5e26\u5165\u5230\u4e4b\u524d\u7684\u516c\u5f0f\u5f53\u4e2d\u4e86\u3002log10(w) \u548c log10(1-w) \u5bf9\u8f93\u5165\u6cd5\u6765\u8bf4\u4e5f\u90fd\u662f\u5e38\u6570\uff0c\u53ef\u4ee5\u76f4\u63a5\u8ba1\u7b97\u3002<\/p>\n\n\n\n
\u53e6\u4e00\u4e2a\u95ee\u9898\u5c31\u662f\u5982\u4f55\u4fdd\u8bc1\u7528\u6237\u300c\u65b0\u300d\u8f93\u5165\u7684\u5185\u5bb9\u80fd\u591f\u5feb\u901f\u6392\u5e8f\u5230\u7ed3\u679c\u7684\u524d\u5217\u3002sunpinyin \u7684\u505a\u6cd5\u6211\u505a\u4e86\u4e00\u5b9a\u7684\u53c2\u8003\uff0c\u4f46\u662f\u7406\u6027\u4e0a\u89c9\u5f97\u4e0d\u592a\u5408\u7406\u6240\u4ee5\u6839\u636e\u60c5\u51b5\u4f18\u5316\u4e86\u4e00\u4e0b\u3002sunpinyin \u53ea\u8bb0\u5f55 1024 \u4e2a\u8bcd\u5728\u5386\u53f2\u5f53\u4e2d\uff0c\u5f53\u6709\u65b0\u7684\u8bcd\u8fdb\u5165\u5386\u53f2\u7684\u65f6\u5019\uff0c\u4f1a\u8e22\u51fa\u8001\u7684\u5386\u53f2\u3002\u8fd9\u4e2a\u8bbe\u8ba1\u8ba9\u7528\u6237\u8f93\u5165\u4e0d\u4f1a\u504f\u79bb\u7cfb\u7edf\u8f93\u5165\u592a\u8fdc\uff0c\u4f46\u4e5f\u4f1a\u76f8\u5bf9\u5f71\u54cd\u7528\u6237\u5386\u53f2\u7684\u8bb0\u5f55\u3002\u7136\u540e\u6700\u8fd1\u8f93\u5165\u7684\u4e00\u4e9b\u8bcd\u7684\u9891\u7387\u4f1a\u4e58\u4ee5\u4e00\u4e2a\u7cfb\u6570\uff0c\u6765\u53d8\u76f8\u589e\u52a0\u65b0\u8f93\u5165\u7684\u5185\u5bb9\u7684\u6743\u91cd\u3002\u4f46\u8fd9\u4e2a\u8303\u56f4\u7684\u6570\u5b57\u5176\u5b9e\u5f88\u5c0f\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8fd9\u90e8\u5206\u6539\u53d8\u7ed3\u679c\u987a\u5e8f\u7684\u884c\u4e3a\u5f88\u5feb\u88ab\u9057\u5fd8\u3002<\/p>\n\n\n\n
libime \u8fd9\u91cc\u91c7\u53d6\u4e86\u7c7b\u4f3c\u4f46\u505a\u4e86\u4e00\u4e9b\u81ea\u5df1\u7684\u6539\u8fdb\u3002\u7b2c\u4e00\uff0c\u5c06\u7528\u6237\u8f93\u5165\u7684\u8bcd\u6309\u53e5\u5b50\u8bb0\u5f55\uff0c\u7b2c\u4e8c\uff0c\u5c06\u7528\u6237\u8f93\u5165\u7684\u53e5\u5b50\u5206\u6210\u4e09\u4e2a\u4e0d\u540c\u5927\u5c0f\u7684 pool \uff08128\uff0c8192\uff0c65536\uff09\uff0c\u6bcf\u4e2a pool \u7ed9\u4e88\u4e0d\u540c\u7684\u6982\u7387\u6743\u91cd\u3002\uff08\u5177\u4f53\u7684\u6570\u5b57\u7684\u9009\u62e9\u7eaf\u7cb9\u5c31\u662f\u6240\u8c13\u7684 heuristic \u7684\u4e86\uff09\uff0c\u8fd9\u6837\u76f8\u5bf9\u4fdd\u8bc1\u8bb0\u4f4f\u7684\u5386\u53f2\u8f83\u591a\uff0865536\u4e2a\u53e5\u5b50 vs 1024 \u4e2a\u8bcd\uff09\uff0c\u540c\u65f6\u4e5f\u6709\u6839\u636e\u8f93\u5165\u65f6\u95f4\u6709\u8870\u51cf\u7684\u6548\u679c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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