{"id":228432,"date":"2024-05-11T21:09:16","date_gmt":"2024-05-11T13:09:16","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/228432.html"},"modified":"2024-05-11T21:09:24","modified_gmt":"2024-05-11T13:09:24","slug":"word2vec%e8%af%8d%e5%90%91%e9%87%8f%e5%8a%a0%e6%9d%83%e7%9a%84%e6%96%b9%e6%b3%95%e6%9c%89%e5%93%aa%e4%ba%9b","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/228432.html","title":{"rendered":"word2vec\u8bcd\u5411\u91cf\u52a0\u6743\u7684\u65b9\u6cd5\u6709\u54ea\u4e9b"},"content":{"rendered":"

\"word2vec\u8bcd\u5411\u91cf\u52a0\u6743\u7684\u65b9\u6cd5\u6709\u54ea\u4e9b\"<\/p>\n

Word2Vec\u8bcd\u5411\u91cf\u52a0\u6743\u65b9\u6cd5<\/strong>\u4e3b\u8981\u5305\u62ecTF-IDF\u52a0\u6743\u3001\u57fa\u4e8eSIF\uff08Smooth Inverse Frequency\uff09\u7684\u52a0\u6743\u3001Word Embedding Attention\uff08\u6ce8\u610f\u529b\u673a\u5236\u52a0\u6743\uff09<\/strong>\uff0c\u4ee5\u53ca\u5229\u7528\u8bcd\u6027\u548c\u8bcd\u8bed\u5728\u53e5\u5b50\u4e2d\u7684\u4f4d\u7f6e\u4fe1\u606f\u8fdb\u884c\u52a0\u6743\u3002\u8fd9\u4e9b\u65b9\u6cd5\u662f\u4e3a\u4e86\u66f4\u597d\u5730\u5728\u8bed\u4e49\u7a7a\u95f4\u4e2d\u8868\u5f81\u6587\u672c\uff0c\u514b\u670d\u4f20\u7edfWord2Vec\u5728\u5904\u7406\u957f\u6587\u672c\u65f6\u7684\u7f3a\u9677\u3002<\/p>\n<\/p>\n

\u57fa\u4e8eSIF\u7684\u52a0\u6743\u662f\u4e00\u79cd\u6709\u6548\u7684\u8bcd\u5411\u91cf\u52a0\u6743\u65b9\u6cd5\u3002\u5b83\u7ed3\u5408\u4e86\u8bcd\u9891\u4fe1\u606f\u4e0e\u8bcd\u7684\u9006\u6587\u6863\u9891\u7387\uff0c\u901a\u8fc7\u8861\u91cf\u5355\u8bcd\u7684\u91cd\u8981\u6027\u6765\u8c03\u6574\u8be5\u8bcd\u7684\u5411\u91cf\u8868\u793a\u3002SIF\u65b9\u6cd5\u4f7f\u7528\u9884\u5148\u8ba1\u7b97\u7684\u5355\u8bcd\u9891\u7387\u4fe1\u606f\uff0c\u901a\u8fc7\u516c\u5f0f a \/ (a + p(w)) \u6765\u8ba1\u7b97\u6743\u91cd\uff0c\u5176\u4e2da\u662f\u5e73\u6ed1\u53c2\u6570\uff0cp(w)\u662f\u5355\u8bcdw\u7684\u9891\u7387\u3002\u8fd9\u79cd\u65b9\u6cd5\u8ba4\u4e3a\uff0c\u4e00\u4e2a\u5355\u8bcd\u7684\u6743\u91cd\u5e94\u8be5\u4e0e\u5b83\u5728\u8bed\u6599\u5e93\u4e2d\u7684\u9891\u7387\u6210\u53cd\u6bd4\uff0c\u8f83\u9891\u7e41\u7684\u8bcd\u5e94\u8be5\u6709\u8f83\u4f4e\u7684\u6743\u91cd\u3002<\/p>\n<\/p>\n

\n

\u4e00\u3001TF-IDF\u52a0\u6743<\/h3>\n<\/p>\n

TF-IDF (Term Frequency-Inverse Document Frequency)<\/strong> \u662f\u4e00\u79cd\u7edf\u8ba1\u65b9\u6cd5\uff0c\u7528\u4ee5\u8bc4\u4f30\u4e00\u4e2a\u8bcd\u8bed\u5bf9\u4e8e\u4e00\u4e2a\u8bed\u6599\u5e93\u4e2d\u7684\u6587\u6863\u96c6\u7684\u91cd\u8981\u6027\u3002\u8bcd\u8bed\u7684\u91cd\u8981\u6027\u4f1a\u968f\u7740\u5b83\u5728\u6587\u6863\u4e2d\u51fa\u73b0\u7684\u6b21\u6570\u589e\u52a0\u800c\u589e\u52a0\uff0c\u4f46\u540c\u65f6\u4f1a\u968f\u7740\u5b83\u5728\u8bed\u6599\u5e93\u4e2d\u7684\u6587\u6863\u9891\u7387\u7684\u589e\u52a0\u800c\u51cf\u5c11\u3002<\/p>\n<\/p>\n

    \n
  • TF (Term Frequency)\uff1a\u8bcd\u9891\uff0c\u5373\u67d0\u4e2a\u8bcd\u5728\u6587\u6863\u4e2d\u7684\u51fa\u73b0\u6b21\u6570\u3002\u8fd9\u53cd\u6620\u4e86\u8bcd\u5728\u6587\u6863\u4e2d\u7684\u91cd\u8981\u7a0b\u5ea6\uff0c\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u91cd\u8981\u7684\u8bcd\u4f1a\u5728\u6587\u6863\u4e2d\u591a\u6b21\u51fa\u73b0\u3002<\/li>\n
  • IDF (Inverse Document Frequency)\uff1a\u9006\u6587\u6863\u9891\u7387\uff0c\u8bc4\u4f30\u8bcd\u666e\u904d\u6027\u7684\u6307\u6807\u3002\u5982\u679c\u53ea\u6709\u5c11\u6570\u6587\u6863\u5305\u542b\u67d0\u4e2a\u8bcd\u8bed\uff0c\u90a3\u4e48\u5b83\u53ef\u80fd\u627f\u8f7d\u4e86\u66f4\u591a\u7684\u4fe1\u606f\uff0c\u53cd\u4e4b\u4ea6\u7136\u3002<\/li>\n<\/ul>\n

    \u5c06Word2Vec\u6a21\u578b\u6240\u5f97\u5230\u7684\u8bcd\u5411\u91cf\u4e0eTF-IDF\u6743\u91cd\u7ed3\u5408\uff0c\u53ef\u4ee5\u5f97\u5230\u66f4\u4e3a\u7cbe\u51c6\u7684\u6587\u672c\u8868\u5f81\u3002\u52a0\u6743\u8fc7\u7a0b\u4e2d\uff0c\u9996\u5148\u5bf9\u6bcf\u4e2a\u8bcd\u8ba1\u7b97\u5176TF-IDF\u503c\uff0c\u7136\u540e\u5c06Word2Vec\u751f\u6210\u7684\u8bcd\u5411\u91cf\u4e0e\u5bf9\u5e94\u7684TF-IDF\u503c\u76f8\u4e58\uff0c\u6700\u540e\u5c06\u6240\u6709\u8bcd\u7684\u52a0\u6743\u8bcd\u5411\u91cf\u6c42\u5e73\u5747\uff0c\u4f5c\u4e3a\u6574\u4e2a\u6587\u6863\u7684\u5411\u91cf\u8868\u793a\u3002<\/p>\n<\/p>\n

    \u4e8c\u3001SIF\u52a0\u6743<\/h3>\n<\/p>\n

    SIF (Smooth Inverse Frequency)<\/strong> \u65b9\u6cd5\u8003\u8651\u5230\u4e86\u8bcd\u9891\u7684\u5206\u5e03\u7279\u6027\uff0c\u901a\u8fc7\u8c03\u6574\u5355\u8bcd\u7684\u6743\u91cd\uff0c\u5e73\u8861\u4e86\u5e38\u7528\u8bcd\u548c\u7a00\u6709\u8bcd\u5728\u8868\u5f81\u6587\u672c\u65f6\u7684\u5f71\u54cd\u3002<\/p>\n<\/p>\n

    \u6b64\u65b9\u6cd5\u4e2d\uff0c\u8bcd\u7684\u6743\u91cd\u8ba1\u7b97\u516c\u5f0f\u4e3a a \/ (a + p(w))\uff0c\u5176\u4e2da\u662f\u4e00\u4e2a\u5e38\u6570\uff0c\u901a\u5e38\u53d6\u503c\u8303\u56f4\u57281e-3\u81f31e-4\uff0cp(w)\u4e3a\u5355\u8bcd\u5728\u8bed\u6599\u5e93\u4e2d\u7684\u8bcd\u9891\u3002SIF\u65b9\u6cd5\u63d0\u51fa\u4e86\u5bf9\u6bcf\u4e2a\u8bcd\u5411\u91cf\u8fdb\u884c\u52a0\u6743\u5e73\u5747\uff0c\u7136\u540e\u4ece\u8fd9\u4e2a\u5e73\u5747\u503c\u4e2d\u51cf\u53bb\u4ed6\u4eec\u7684\u7b2c\u4e00\u4e2a\u4e3b\u6210\u5206\uff08PCA\u7684\u4e00\u79cd\u5e94\u7528\uff09\uff0c\u8fd9\u6837\u901a\u5e38\u80fd\u53bb\u9664\u6389\u8bed\u6599\u5e93\u4e2d\u7684\u4e00\u4e9b\u5e38\u89c1\u6210\u5206\uff0c\u4f8b\u5982\u201c\u662f\u201d\u3001\u201c\u7684\u201d\u8fd9\u6837\u7684\u505c\u7528\u8bcd\uff0c\u4fdd\u7559\u4e0b\u6587\u6863\u7684\u8bed\u4e49\u4fe1\u606f\u3002<\/p>\n<\/p>\n

    \u4e09\u3001\u6ce8\u610f\u529b\u673a\u5236\u52a0\u6743<\/h3>\n<\/p>\n

    \u6ce8\u610f\u529b\u673a\u5236<\/strong>\u662f\u6df1\u5ea6\u5b66\u4e60\u4e2d\u7684\u4e00\u4e2a\u6982\u5ff5\uff0c\u5176\u601d\u60f3\u662f\u5728\u6a21\u578b\u4e2d\u52a0\u5165\u4e86\u4e00\u4e2a\u53ef\u4ee5\u5bf9\u4e0d\u540c\u90e8\u5206\u5206\u914d\u4e0d\u540c\u5173\u6ce8\u5ea6\u7684\u7ed3\u6784\u3002\u5728Word2Vec\u4e2d\u5e94\u7528\u6ce8\u610f\u529b\u673a\u5236\uff0c\u5c31\u662f\u5bf9\u6587\u672c\u4e2d\u4e0d\u540c\u8bcd\u8d4b\u4e88\u4e0d\u540c\u7684\u6743\u91cd\uff0c\u5e76\u975e\u7b80\u5355\u5730\u7ed9\u6240\u6709\u8bcd\u76f8\u540c\u7684\u91cd\u89c6\u7a0b\u5ea6\u3002<\/p>\n<\/p>\n

    \u8be5\u65b9\u6cd5\u901a\u5e38\u7ed3\u5408\u4e86\u795e\u7ecf\u7f51\u7edc\u6765\u5b66\u4e60\u6bcf\u4e2a\u8bcd\u7684\u6743\u91cd\u3002\u901a\u8fc7\u6a21\u578b\u8bad\u7ec3\uff0c\u53ef\u4ee5\u8ba9\u8f83\u91cd\u8981\u7684\u8bcd\u5177\u6709\u66f4\u9ad8\u7684\u6743\u91cd\uff0c\u800c\u4e0d\u91cd\u8981\u7684\u8bcd\u5219\u6743\u91cd\u8f83\u4f4e\u3002\u8fd9\u4e0d\u4ec5\u8003\u8651\u4e86\u8bcd\u9891\uff0c\u8fd8\u53ef\u80fd\u5305\u62ec\u4e86\u4e0a\u4e0b\u6587\u5173\u8054\u6027\u548c\u8bcd\u5e8f\u7b49\u56e0\u7d20\u7684\u5f71\u54cd\u3002\u56e0\u6b64\uff0c\u6ce8\u610f\u529b\u673a\u5236\u53ef\u4ee5\u6839\u636e\u53e5\u5b50\u4e2d\u8bcd\u7684\u91cd\u8981\u6027\u6765\u52a8\u6001\u8c03\u6574\u52a0\u6743\uff0c\u4f7f\u5f97\u5411\u91cf\u80fd\u591f\u66f4\u597d\u5730\u8868\u8fbe\u53e5\u5b50\u7684\u4e3b\u8981\u610f\u4e49\u3002<\/p>\n<\/p>\n

    \u56db\u3001\u57fa\u4e8e\u8bcd\u6027\u548c\u4f4d\u7f6e\u4fe1\u606f\u52a0\u6743<\/h3>\n<\/p>\n

    \u6587\u672c\u4e2d\u7684\u8bcd\u901a\u5e38\u5177\u6709\u5404\u79cd\u8bcd\u6027\uff0c\u5982\u540d\u8bcd\u3001\u52a8\u8bcd\u3001\u5f62\u5bb9\u8bcd\u7b49\uff0c\u4e0d\u540c\u8bcd\u6027\u7684\u8bcd\u5728\u8868\u5f81\u6587\u672c\u610f\u4e49\u65f6\u7684\u91cd\u8981\u6027\u4e5f\u4e0d\u5c3d\u76f8\u540c\u3002\u4f8b\u5982\uff0c\u540d\u8bcd\u548c\u52a8\u8bcd\u5f80\u5f80\u643a\u5e26\u66f4\u591a\u7684\u8bed\u4e49\u4fe1\u606f\uff0c\u800c\u52a9\u8bcd\u6216\u4ecb\u8bcd\u7b49\u901a\u5e38\u4fe1\u606f\u91cf\u8f83\u5c0f\u3002<\/p>\n<\/p>\n

    \u901a\u8fc7\u4f7f\u7528\u81ea\u7136\u8bed\u8a00\u5904\u7406\u5de5\u5177\u6765\u8bc6\u522b\u51fa\u8bcd\u7684\u8bcd\u6027\u540e\uff0c\u53ef\u4ee5\u57fa\u4e8e\u8bcd\u6027\u4fe1\u606f\u6765\u4e3a\u6bcf\u4e2a\u8bcd\u5206\u914d\u4e0d\u540c\u7684\u6743\u91cd\u3002\u540c\u6837\uff0c\u8bcd\u8bed\u5728\u53e5\u5b50\u4e2d\u7684\u4f4d\u7f6e\u4fe1\u606f\u4e5f\u4f1a\u5f71\u54cd\u5176\u8bed\u4e49\u91cd\u8981\u6027\u3002\u4f8b\u5982\uff0c\u4f4d\u4e8e\u53e5\u5b50\u5f00\u5934\u6216\u7ed3\u5c3e\u7684\u8bcd\uff0c\u53ef\u80fd\u6bd4\u53e5\u4e2d\u5176\u4ed6\u4f4d\u7f6e\u7684\u8bcd\u542b\u6709\u66f4\u591a\u7684\u4e3b\u9898\u4fe1\u606f\u3002\u56e0\u6b64\uff0c\u4e5f\u53ef\u4ee5\u8003\u8651\u8bcd\u8bed\u5728\u53e5\u5b50\u4e2d\u7684\u4f4d\u7f6e\uff0c\u4e3a\u4e0d\u540c\u4f4d\u7f6e\u7684\u8bcd\u8d4b\u4e88\u4e0d\u540c\u7684\u6743\u91cd\u3002<\/p>\n<\/p>\n

    \u7efc\u5408\u8fd9\u4e9b\u52a0\u6743\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5f97\u5230\u66f4\u4e3a\u4e30\u5bcc\u548c\u51c6\u786e\u7684\u6587\u672c\u5411\u91cf\u5316\u8868\u5f81\uff0c\u4ece\u800c\u5728\u8fdb\u884c\u6587\u672c\u5206\u7c7b\u3001\u60c5\u611f\u5206\u6790\u548c\u4fe1\u606f\u68c0\u7d22\u7b49\u4efb\u52a1\u65f6\u5c55\u73b0\u51fa\u66f4\u597d\u7684\u6027\u80fd\u3002\u8fd9\u4e9b\u52a0\u6743\u65b9\u6cd5\u4e5f\u4f53\u73b0\u4e86\u5728\u5411\u91cf\u5316\u8868\u793a\u6587\u672c\u65f6\uff0c\u91cd\u8981\u6027\u5206\u914d\u7684\u5fc5\u8981\u6027\u3002<\/p>\n<\/p>\n

    \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

    \u600e\u6837\u5bf9word2vec\u8bcd\u5411\u91cf\u8fdb\u884c\u52a0\u6743\uff1f<\/strong><\/p>\n

    \u5728word2vec\u8bcd\u5411\u91cf\u4e2d\uff0c\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5bf9\u8bcd\u5411\u91cf\u8fdb\u884c\u52a0\u6743\u3002<\/p>\n

    \u4e00\u79cd\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u4f7f\u7528TF-IDF\uff08\u8bcd\u9891-\u9006\u6587\u6863\u9891\u7387\uff09\u6765\u5bf9\u8bcd\u5411\u91cf\u8fdb\u884c\u52a0\u6743\u3002TF-IDF\u5c06\u8bcd\u8bed\u5728\u6587\u6863\u4e2d\u7684\u9891\u7387\u4e0e\u8be5\u8bcd\u8bed\u5728\u6574\u4e2a\u8bed\u6599\u5e93\u4e2d\u7684\u9891\u7387\u8fdb\u884c\u5bf9\u6bd4\uff0c\u65e8\u5728\u8861\u91cf\u4e00\u4e2a\u8bcd\u7684\u91cd\u8981\u6027\u3002\u53ef\u4ee5\u4f7f\u7528TF-IDF\u6765\u8ba1\u7b97\u6bcf\u4e2a\u8bcd\u7684\u6743\u91cd\uff0c\u5e76\u5c06\u6743\u91cd\u4e58\u4ee5\u5bf9\u5e94\u7684\u8bcd\u5411\u91cf\u3002<\/p>\n

    \u53e6\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528\u8bcd\u8bed\u7684\u60c5\u611f\u6781\u6027\u6765\u5bf9\u8bcd\u5411\u91cf\u8fdb\u884c\u52a0\u6743\u3002\u53ef\u4ee5\u4f7f\u7528\u60c5\u611f\u8bcd\u5178\u6216\u8005\u60c5\u611f\u5206\u7c7b\u5668\u6765\u5224\u65ad\u6bcf\u4e2a\u8bcd\u8bed\u7684\u60c5\u611f\u79ef\u6781\u6027\u6216\u6d88\u6781\u6027\uff0c\u5e76\u5c06\u60c5\u611f\u6781\u6027\u4f5c\u4e3a\u6743\u91cd\u4e0e\u8bcd\u5411\u91cf\u76f8\u4e58\u3002<\/p>\n

    \u8fd8\u6709\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528\u8bcd\u8bed\u7684\u8bcd\u6027\u6765\u5bf9\u8bcd\u5411\u91cf\u8fdb\u884c\u52a0\u6743\u3002\u53ef\u4ee5\u4f7f\u7528\u8bcd\u6027\u6807\u6ce8\u5de5\u5177\u6765\u6807\u6ce8\u6bcf\u4e2a\u8bcd\u8bed\u7684\u8bcd\u6027\uff0c\u5e76\u5c06\u4e0d\u540c\u8bcd\u6027\u7684\u6743\u91cd\u4e0e\u8bcd\u5411\u91cf\u76f8\u4e58\u3002<\/p>\n

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