{"id":253,"date":"2024-09-19T15:58:14","date_gmt":"2024-09-19T07:58:14","guid":{"rendered":"https:\/\/ai.oaido.com\/?p=253"},"modified":"2024-09-19T16:00:51","modified_gmt":"2024-09-19T08:00:51","slug":"attention-is-all-you-need-transformer-%e8%ae%ba%e6%96%87","status":"publish","type":"post","link":"https:\/\/ai.oaido.com\/index.php\/2024\/09\/19\/attention-is-all-you-need-transformer-%e8%ae%ba%e6%96%87\/","title":{"rendered":"Attention Is All You Need (Transformer) \u8bba\u6587"},"content":{"rendered":"\n<p><em>Attention Is All You Need<\/em>&nbsp;(Transformer) 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href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#%E6%91%98%E8%A6%81%E4%B8%8E%E5%BC%95%E8%A8%80\"><\/a>\u6458\u8981\u4e0e\u5f15\u8a00<\/h2>\n\n\n\n<p>\u8865\u5145\u5b8c\u4e86\u80cc\u666f\u77e5\u8bc6\uff0c\u6587\u7ae0\u5c31\u8bfb\u8d77\u6765\u6bd4\u8f83\u8f7b\u677e\u4e86\u3002<\/p>\n\n\n\n<p>\u6458\u8981\u4f20\u9012\u7684\u4fe1\u606f\u975e\u5e38\u7b80\u7ec3\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5f53\u524d\u6700\u597d\u7684\u67b6\u6784\u662f\u57fa\u4e8e\u6ce8\u610f\u529b\u7684\u201dencoder-decoder\u201d\u67b6\u6784\u3002\u8fd9\u4e9b\u67b6\u6784\u90fd\u4f7f\u7528\u4e86CNN\u6216RNN\u3002\u8fd9\u7bc7\u6587\u7ae0\u63d0\u51fa\u7684Transformer\u67b6\u6784\u4ec5\u4f7f\u7528\u4e86\u6ce8\u610f\u529b\u673a\u5236\uff0c\u800c\u65e0\u9700\u4f7f\u7528CNN\u548cRNN\u3002<\/li>\n\n\n\n<li>\u4e24\u9879\u673a\u5668\u7ffb\u8bd1\u7684\u5b9e\u9a8c\u8868\u660e\uff0c\u8fd9\u79cd\u67b6\u6784\u4e0d\u4ec5\u7cbe\u5ea6\u9ad8\uff0c\u800c\u4e14\u8bad\u7ec3\u65f6\u95f4\u5927\u5e45\u7f29\u77ed\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u6458\u8981\u5e76\u6ca1\u6709\u89e3\u91caTransformer\u7684\u8bbe\u8ba1\u52a8\u673a\u3002\u8ba9\u6211\u4eec\u5728\u5f15\u8a00\u4e2d\u4e00\u63a2\u7a76\u7adf\u3002<\/p>\n\n\n\n<p>\u5f15\u8a00\u7684\u7b2c\u4e00\u6bb5\u56de\u987e\u4e86RNN\u67b6\u6784\u3002\u4ee5LSTM\u548cGRU\u4e3a\u4ee3\u8868\u7684RNN\u5728\u591a\u9879\u5e8f\u5217\u4efb\u52a1\u4e2d\u53d6\u5f97\u9876\u5c16\u7684\u6210\u679c\u3002\u8bb8\u591a\u7814\u7a76\u4ecd\u5728\u62d3\u5bbd\u5faa\u73af\u8bed\u8a00\u6a21\u578b\u548c\u201dencoder-decoder\u201d\u67b6\u6784\u7684\u80fd\u529b\u8fb9\u754c\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\u6bb5\u5c31\u5f00\u59cb\u8bb2RNN\u7684\u4e0d\u8db3\u4e86\u3002RNN\u8981\u7ef4\u62a4\u4e00\u4e2a\u9690\u72b6\u6001\uff0c\u8be5\u9690\u72b6\u6001\u53d6\u51b3\u4e8e\u4e0a\u4e00\u65f6\u523b\u7684\u9690\u72b6\u6001\u3002\u8fd9\u79cd\u5185\u5728\u7684\u4e32\u884c\u8ba1\u7b97\u7279\u8d28\u963b\u788d\u4e86\u8bad\u7ec3\u65f6\u7684\u5e76\u884c\u8ba1\u7b97\uff08\u7279\u522b\u662f\u8bad\u7ec3\u5e8f\u5217\u8f83\u957f\u65f6\uff0c\u6bcf\u4e00\u4e2a\u53e5\u5b50\u5360\u7528\u7684\u5b58\u50a8\u66f4\u591a\uff0cbatch size\u53d8\u5c0f\uff0c\u5e76\u884c\u5ea6\u964d\u4f4e\uff09\u3002\u6709\u8bb8\u591a\u7814\u7a76\u90fd\u5728\u5c1d\u8bd5\u89e3\u51b3\u8fd9\u4e00\u95ee\u9898\uff0c\u4f46\u662f\uff0c\u4e32\u884c\u8ba1\u7b97\u7684\u672c\u8d28\u662f\u65e0\u6cd5\u6539\u53d8\u7684\u3002<\/p>\n\n\n\n<p>\u4e0a\u4e00\u6bb5\u6697\u793a\u4e86Transformer\u7684\u7b2c\u4e00\u4e2a\u8bbe\u8ba1\u52a8\u673a\uff1a\u63d0\u5347\u8bad\u7ec3\u7684\u5e76\u884c\u5ea6\u3002\u7b2c\u4e09\u6bb5\u8bb2\u4e86Transformer\u7684\u53e6\u4e00\u4e2a\u8bbe\u8ba1\u52a8\u673a\uff1a\u6ce8\u610f\u529b\u673a\u5236\u3002\u6ce8\u610f\u529b\u673a\u5236\u662f\u5f53\u65f6\u6700\u9876\u5c16\u7684\u6a21\u578b\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u7ec4\u4ef6\u3002\u8fd9\u4e00\u673a\u5236\u53ef\u4ee5\u8ba9\u6bcf\u5bf9\u8f93\u5165\u8f93\u51fa\u5173\u8054\u8d77\u6765\uff0c\u800c\u4e0d\u7528\u50cf\u65e9\u671f\u4f7f\u7528\u4e00\u4e2a\u9690\u72b6\u6001\u4f20\u9012\u4fe1\u606f\u7684\u201dencoder-decoder\u201d\u6a21\u578b\u4e00\u6837\uff0c\u53d7\u5230\u5e8f\u5217\u8ddd\u79bb\u7684\u9650\u5236\u3002\u7136\u800c\uff0c\u51e0\u4e4e\u6240\u6709\u7684\u6ce8\u610f\u529b\u673a\u5236\u90fd\u7528\u5728RNN\u4e0a\u7684\u3002<\/p>\n\n\n\n<p>\u65e2\u7136\u6ce8\u610f\u529b\u673a\u5236\u80fd\u591f\u65e0\u89c6\u5e8f\u5217\u7684\u5148\u540e\u987a\u5e8f\uff0c\u6355\u6349\u5e8f\u5217\u95f4\u7684\u5173\u7cfb\uff0c\u4e3a\u4ec0\u4e48\u4e0d\u53ea\u7528\u8fd9\u79cd\u673a\u5236\u6765\u6784\u9020\u4e00\u4e2a\u9002\u7528\u4e8e\u5e76\u884c\u8ba1\u7b97\u7684\u6a21\u578b\u5462\uff1f\u56e0\u6b64\uff0c\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u4f5c\u8005\u63d0\u51fa\u4e86Transformer\u67b6\u6784\u3002\u8fd9\u4e00\u67b6\u6784\u89c4\u907f\u4e86RNN\u7684\u4f7f\u7528\uff0c\u5b8c\u5168\u4f7f\u7528\u6ce8\u610f\u529b\u673a\u5236\u6765\u6355\u6349\u8f93\u5165\u8f93\u51fa\u5e8f\u5217\u4e4b\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb\u3002\u8fd9\u79cd\u67b6\u6784\u4e0d\u4ec5\u8bad\u7ec3\u5f97\u66f4\u5feb\u4e86\uff0c\u8868\u73b0\u8fd8\u66f4\u5f3a\u4e86\u3002<\/p>\n\n\n\n<p>\u901a\u8fc7\u9605\u8bfb\u6458\u8981\u548c\u5f15\u8a00\uff0c\u6211\u4eec\u57fa\u672c\u7406\u89e3\u4e86Transformer\u67b6\u6784\u7684\u8bbe\u8ba1\u52a8\u673a\u3002\u4f5c\u8005\u60f3\u514b\u670dRNN\u4e0d\u80fd\u5e76\u884c\u7684\u7f3a\u70b9\uff0c\u53c8\u60f3\u5145\u5206\u5229\u7528\u6ca1\u6709\u4e32\u884c\u9650\u5236\u7684\u6ce8\u610f\u529b\u673a\u5236\uff0c\u4e8e\u662f\u5c31\u63d0\u51fa\u4e86\u4e00\u4e2a\u53ea\u6709\u6ce8\u610f\u529b\u673a\u5236\u7684\u6a21\u578b\u3002\u6a21\u578b\u8bad\u7ec3\u51fa\u6765\u4e86\uff0c\u7ed3\u679c\u51fa\u4e4e\u9884\u6599\u5730\u597d\uff0c\u4e0d\u4ec5\u8bad\u7ec3\u901f\u5ea6\u5927\u5e45\u52a0\u5feb\uff0c\u6a21\u578b\u7684\u8868\u73b0\u4e5f\u8d85\u8fc7\u4e86\u5f53\u65f6\u6240\u6709\u5176\u4ed6\u6a21\u578b\u3002<\/p>\n\n\n\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u8df3\u5230\u7b2c\u4e09\u7ae0\u5b66\u4e60Tranformer\u7684\u7ed3\u6784\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u6ce8\u610f\u529b\u673a\u5236\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#%E6%B3%A8%E6%84%8F%E5%8A%9B%E6%9C%BA%E5%88%B6\"><\/a>\u6ce8\u610f\u529b\u673a\u5236<\/h2>\n\n\n\n<p>\u6587\u7ae0\u5728\u4ecb\u7ecdTransformer\u7684\u67b6\u6784\u65f6\uff0c\u662f\u81ea\u9876\u5411\u4e0b\u4ecb\u7ecd\u7684\u3002\u4f46\u662f\uff0c\u4e00\u5f00\u59cb\u6211\u4eec\u5e76\u4e0d\u4e86\u89e3Transformer\u7684\u5404\u4e2a\u6a21\u5757\uff0c\u7406\u89e3\u6574\u4f53\u6846\u67b6\u65f6\u4f1a\u6709\u4e0d\u5c11\u7684\u963b\u788d\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u81ea\u5e95\u5411\u4e0a\u5730\u6765\u5b66\u4e60Transformer\u67b6\u6784\u3002<\/p>\n\n\n\n<p>\u9996\u5148\uff0c\u8df3\u52303.2\u8282\uff0c\u8fd9\u4e00\u8282\u4ecb\u7ecd\u4e86Transformer\u91cc\u6700\u6838\u5fc3\u7684\u673a\u5236\u2014\u2014\u6ce8\u610f\u529b\u3002\u5728\u9605\u8bfb\u8fd9\u90e8\u5206\u7684\u6587\u5b57\u4e4b\u524d\uff0c\u6211\u4eec\u5148\u62bd\u8c61\u5730\u7406\u89e3\u4e00\u4e0b\u6ce8\u610f\u529b\u673a\u5236\u7a76\u7adf\u662f\u5728\u505a\u4ec0\u4e48\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u6ce8\u610f\u529b\u8ba1\u7b97\u7684\u4e00\u4e2a\u4f8b\u5b50\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#%E6%B3%A8%E6%84%8F%E5%8A%9B%E8%AE%A1%E7%AE%97%E7%9A%84%E4%B8%80%E4%B8%AA%E4%BE%8B%E5%AD%90\"><\/a>\u6ce8\u610f\u529b\u8ba1\u7b97\u7684\u4e00\u4e2a\u4f8b\u5b50<\/h3>\n\n\n\n<p>\u5176\u5b9e\uff0c\u201c\u6ce8\u610f\u529b\u201d\u8fd9\u4e2a\u540d\u5b57\u53d6\u5f97\u975e\u5e38\u4e0d\u6613\u4e8e\u7406\u89e3\u3002\u8fd9\u4e2a\u673a\u5236\u5e94\u8be5\u53eb\u505a\u201c\u5168\u5c40\u4fe1\u606f\u67e5\u8be2\u201d\u3002\u505a\u4e00\u6b21\u201c\u6ce8\u610f\u529b\u201d\u8ba1\u7b97\uff0c\u5176\u5b9e\u5c31\u8ddf\u53bb\u6570\u636e\u5e93\u4e86\u505a\u4e86\u4e00\u6b21\u67e5\u8be2\u4e00\u6837\u3002\u5047\u8bbe\uff0c\u6211\u4eec\u73b0\u5728\u6709\u8fd9\u6837\u4e00\u4e2a\u4ee5\u4eba\u540d\u4e3akey\uff08\u952e\uff09\uff0c\u4ee5\u5e74\u9f84\u4e3avalue\uff08\u503c\uff09\u7684\u6570\u636e\u5e93\uff1atext<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>1<br>2<br>3<br>4<br>5<br>6<\/td><td>{<br>\u5f20\u4e09: 18,<br>\u5f20\u4e09: 20,<br>\u674e\u56db: 22,<br>\u5f20\u4f1f: 19<br>}<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u73b0\u5728\uff0c\u6211\u4eec\u6709\u4e00\u4e2aquery\uff08\u67e5\u8be2\uff09\uff0c\u95ee\u6240\u6709\u53eb\u201c\u5f20\u4e09\u201d\u7684\u4eba\u7684\u5e74\u9f84\u5e73\u5747\u503c\u662f\u591a\u5c11\u3002\u8ba9\u6211\u4eec\u5199\u7a0b\u5e8f\u7684\u8bdd\uff0c\u6211\u4eec\u4f1a\u628a\u5b57\u7b26\u4e32\u201c\u5f20\u4e09\u201d\u548c\u6240\u6709key\u505a\u6bd4\u8f83\uff0c\u627e\u51fa\u6240\u6709\u201c\u5f20\u4e09\u201d\u7684value\uff0c\u628a\u8fd9\u4e9b\u5e74\u9f84\u503c\u76f8\u52a0\uff0c\u53d6\u4e00\u4e2a\u5e73\u5747\u6570\u3002\u8fd9\u4e2a\u5e73\u5747\u6570\u662f(18+20)\/2=19\u3002<\/p>\n\n\n\n<p>\u4f46\u662f\uff0c\u5f88\u591a\u65f6\u5019\uff0c\u6211\u4eec\u7684\u67e5\u8be2\u5e76\u4e0d\u662f\u90a3\u4e48\u660e\u786e\u3002\u6bd4\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u60f3\u67e5\u8be2\u4e00\u4e0b\u6240\u6709\u59d3\u5f20\u7684\u4eba\u7684\u5e74\u9f84\u5e73\u5747\u503c\u3002\u8fd9\u6b21\uff0c\u6211\u4eec\u4e0d\u662f\u53bb\u6bd4\u8f83<code>key == \u5f20\u4e09<\/code>,\u800c\u662f\u6bd4\u8f83<code>key[0] == \u5f20<\/code>\u3002\u8fd9\u4e2a\u5e73\u5747\u6570\u5e94\u8be5\u662f(18+20+19)\/3=19\u3002<\/p>\n\n\n\n<p>\u6216\u8bb8\uff0c\u6211\u4eec\u7684\u67e5\u8be2\u4f1a\u66f4\u6a21\u7cca\u4e00\u70b9\uff0c\u6a21\u7cca\u5230\u65e0\u6cd5\u7528\u7b80\u5355\u7684\u5224\u65ad\u8bed\u53e5\u6765\u5b8c\u6210\u3002\u56e0\u6b64\uff0c\u6700\u901a\u7528\u7684\u65b9\u6cd5\u662f\uff0c\u628aquery\u548ckey\u5404\u5efa\u6a21\u6210\u4e00\u4e2a\u5411\u91cf\u3002\u4e4b\u540e\uff0c\u5bf9query\u548ckey\u4e4b\u95f4\u7b97\u4e00\u4e2a\u76f8\u4f3c\u5ea6\uff08\u6bd4\u5982\u5411\u91cf\u5185\u79ef\uff09\uff0c\u4ee5\u8fd9\u4e2a\u76f8\u4f3c\u5ea6\u4e3a\u6743\u91cd\uff0c\u7b97value\u7684\u52a0\u6743\u548c\u3002\u8fd9\u6837\uff0c\u4e0d\u7ba1\u591a\u4e48\u62bd\u8c61\u7684\u67e5\u8be2\uff0c\u6211\u4eec\u90fd\u53ef\u4ee5\u628aquery, key\u5efa\u6a21\u6210\u5411\u91cf\uff0c\u7528\u5411\u91cf\u76f8\u4f3c\u5ea6\u4ee3\u66ff\u67e5\u8be2\u7684\u5224\u65ad\u8bed\u53e5\uff0c\u7528\u52a0\u6743\u548c\u4ee3\u66ff\u76f4\u63a5\u53d6\u503c\u518d\u6c42\u5e73\u5747\u503c\u3002\u201c\u6ce8\u610f\u529b\u201d\uff0c\u5176\u5b9e\u6307\u7684\u5c31\u662f\u8fd9\u91cc\u7684\u6743\u91cd\u3002<\/p>\n\n\n\n<p>\u628a\u8fd9\u79cd\u65b0\u65b9\u6cd5\u5957\u5165\u521a\u521a\u90a3\u4e2a\u4f8b\u5b50\u91cc\u3002\u6211\u4eec\u5148\u628a\u6240\u6709key\u5efa\u6a21\u6210\u5411\u91cf\uff0c\u53ef\u80fd\u53ef\u4ee5\u5f97\u5230\u8fd9\u6837\u7684\u4e00\u4e2a\u65b0\u6570\u636e\u5e93\uff1atext<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>1<br>2<br>3<br>4<br>5<br>6<\/td><td>{<br>[1, 2, 0]: 18, # \u5f20\u4e09<br>[1, 2, 0]: 20, # \u5f20\u4e09<br>[0, 0, 2]: 22, # \u674e\u56db<br>[1, 4, 0]: 19 # \u5f20\u4f1f<br>}<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u5047\u8bbe<code>key[0]==1<\/code>\u8868\u793a\u59d3\u5f20\u3002\u6211\u4eec\u7684\u67e5\u8be2\u201c\u6240\u6709\u59d3\u5f20\u7684\u4eba\u7684\u5e74\u9f84\u5e73\u5747\u503c\u201d\u5c31\u53ef\u4ee5\u8868\u793a\u6210\u5411\u91cf<code>[1, 0, 0]<\/code>\u3002\u7528\u8fd9\u4e2aquery\u548c\u6240\u6709key\u7b97\u51fa\u7684\u6743\u91cd\u662f\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>1<br>2<br>3<br>4<\/td><td>dot([1, 0, 0], [1, 2, 0]) = 1<br>dot([1, 0, 0], [1, 2, 0]) = 1<br>dot([1, 0, 0], [0, 0, 2]) = 0<br>dot([1, 0, 0], [1, 4, 0]) = 1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u4e4b\u540e\uff0c\u6211\u4eec\u8be5\u7528\u8fd9\u4e9b\u6743\u91cd\u7b97\u5e73\u5747\u503c\u4e86\u3002\u6ce8\u610f\uff0c\u7b97\u5e73\u5747\u503c\u65f6\uff0c\u6743\u91cd\u7684\u548c\u5e94\u8be5\u662f1\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u7528softmax\u628a\u8fd9\u4e9b\u6743\u91cd\u5f52\u4e00\u5316\u4e00\u4e0b\uff0c\u518d\u7b97value\u7684\u52a0\u6743\u548c\u3002text<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>1<br>2<\/td><td>softmax([1, 1, 0, 1]) = [1\/3, 1\/3, 0, 1\/3]<br>dot([1\/3, 1\/3, 0, 1\/3], [18, 20, 22, 19]) = 19<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u8fd9\u6837\uff0c\u6211\u4eec\u5c31\u7528\u5411\u91cf\u8fd0\u7b97\u4ee3\u66ff\u4e86\u5224\u65ad\u8bed\u53e5\uff0c\u5b8c\u6210\u4e86\u6570\u636e\u5e93\u7684\u5168\u5c40\u4fe1\u606f\u67e5\u8be2\u3002\u90a3\u4e09\u4e2a<code>1\/3<\/code>\uff0c\u5c31\u662fquery\u5bf9\u6bcf\u4e2akey\u7684\u6ce8\u610f\u529b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"Scaled-Dot-Product-Attention-\uff083-2-1\u8282\uff09\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#Scaled-Dot-Product-Attention-%EF%BC%883-2-1%E8%8A%82%EF%BC%89\"><\/a>Scaled Dot-Product Attention \uff083.2.1\u8282\uff09<\/h3>\n\n\n\n<p>\u6211\u4eec\u521a\u521a\u5b8c\u6210\u7684\u8ba1\u7b97\u5dee\u4e0d\u591a\u5c31\u662fTransformer\u91cc\u7684\u6ce8\u610f\u529b\uff0c\u8fd9\u79cd\u8ba1\u7b97\u5728\u8bba\u6587\u91cc\u53eb\u505a\u653e\u7f29\u70b9\u4e58\u6ce8\u610f\u529b\uff08Scaled Dot-Product Attention\uff09\u3002\u5b83\u7684\u516c\u5f0f\u662f\uff1aAttention(Q,K,V)=softmax(QKTdk)V<\/p>\n\n\n\n<p>\u6211\u4eec\u5148\u6765\u770b\u770bQ,K,V\u5728\u521a\u521a\u90a3\u4e2a\u4f8b\u5b50\u91cc\u7a76\u7adf\u662f\u4ec0\u4e48\u3002K\u6bd4\u8f83\u597d\u7406\u89e3\uff0cK\u5176\u5b9e\u5c31\u662fkey\u5411\u91cf\u7684\u6570\u7ec4\uff0c\u4e5f\u5c31\u662ftext<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>1<\/td><td>K = [[1, 2, 0], [1, 2, 0], [0, 0, 2], [1, 4, 0]]<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u540c\u6837\uff0cV\u5c31\u662fvalue\u5411\u91cf\u7684\u6570\u7ec4\u3002\u800c\u5728\u6211\u4eec\u521a\u521a\u90a3\u4e2a\u4f8b\u5b50\u91cc\uff0cvalue\u90fd\u662f\u5b9e\u6570\u3002\u5b9e\u6570\u5176\u5b9e\u4e5f\u5c31\u662f\u53ef\u4ee5\u770b\u6210\u957f\u5ea6\u4e3a1\u7684\u5411\u91cf\u3002\u56e0\u6b64\uff0c\u90a3\u4e2a\u4f8b\u5b50\u7684V\u5e94\u8be5\u662ftext<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>1<\/td><td>V = [[18], [20], [22], [19]]<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u5728\u521a\u521a\u90a3\u4e2a\u4f8b\u5b50\u91cc\uff0c\u6211\u4eec\u53ea\u505a\u4e86\u4e00\u6b21\u67e5\u8be2\u3002\u56e0\u6b64\uff0c\u51c6\u786e\u6765\u8bf4\uff0c\u6211\u4eec\u7684\u64cd\u4f5c\u5e94\u8be5\u5199\u6210\u3002MyAttention(q,K,V)=softmax(qKT)V<\/p>\n\n\n\n<p>\u5176\u4e2d\uff0cquery&nbsp;q\u5c31\u662f<code>[1, 0, 0]<\/code>\u4e86\u3002<\/p>\n\n\n\n<p>\u5b9e\u9645\u4e0a\uff0c\u6211\u4eec\u53ef\u4ee5\u4e00\u6b21\u505a\u591a\u7ec4query\u3002\u628a\u6240\u6709q\u6253\u5305\u6210\u77e9\u9635Q\uff0c\u5c31\u5f97\u5230\u4e86\u516c\u5f0fAttention(Q,K,V)=softmax(QKTdk)V<\/p>\n\n\n\n<p>\u7b49\u7b49\uff0c\u8fd9\u4e2adk\u662f\u4ec0\u4e48\u610f\u601d\uff1fdk\u5c31\u662fquery\u548ckey\u5411\u91cf\u7684\u957f\u5ea6\u3002\u7531\u4e8equery\u548ckey\u8981\u505a\u70b9\u4e58\uff0c\u8fd9\u4e24\u79cd\u5411\u91cf\u7684\u957f\u5ea6\u5fc5\u987b\u4e00\u81f4\u3002value\u5411\u91cf\u7684\u957f\u5ea6\u5012\u662f\u53ef\u4ee5\u4e0d\u4e00\u81f4\uff0c\u8bba\u6587\u91cc\u628avalue\u5411\u91cf\u7684\u957f\u5ea6\u53eb\u505adv\u3002\u5728\u6211\u4eec\u8fd9\u4e2a\u4f8b\u5b50\u91cc\uff0cdk=3,dv=1\u3002<\/p>\n\n\n\n<p>\u4e3a\u4ec0\u4e48\u8981\u7528\u4e00\u4e2a\u548cdk\u6210\u6bd4\u4f8b\u7684\u9879\u6765\u653e\u7f29QKT\u5462\uff1f\u8fd9\u662f\u56e0\u4e3a\uff0csoftmax\u5728\u7edd\u5bf9\u503c\u8f83\u5927\u7684\u533a\u57df\u68af\u5ea6\u8f83\u5c0f\uff0c\u68af\u5ea6\u4e0b\u964d\u7684\u901f\u5ea6\u6bd4\u8f83\u6162\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u8981\u8ba9\u88absoftmax\u7684\u70b9\u4e58\u6570\u503c\u5c3d\u53ef\u80fd\u5c0f\u3002\u800c\u4e00\u822c\u5728dk\u8f83\u5927\u65f6\uff0c\u4e5f\u5c31\u662f\u5411\u91cf\u8f83\u957f\u65f6\uff0c\u70b9\u4e58\u7684\u6570\u503c\u4f1a\u6bd4\u8f83\u5927\u3002\u9664\u4ee5\u4e00\u4e2a\u548cdk\u76f8\u5173\u7684\u91cf\u80fd\u591f\u9632\u6b62\u70b9\u4e58\u7684\u503c\u8fc7\u5927\u3002<\/p>\n\n\n\n<p>\u521a\u624d\u4e5f\u63d0\u5230\uff0cQKT\u5176\u5b9e\u662f\u5728\u7b97query\u548ckey\u7684\u76f8\u4f3c\u5ea6\u3002\u800c\u7b97\u76f8\u4f3c\u5ea6\u5e76\u4e0d\u53ea\u6709\u6c42\u70b9\u4e58\u8fd9\u4e00\u79cd\u65b9\u5f0f\u3002\u53e6\u4e00\u79cd\u5e38\u7528\u7684\u6ce8\u610f\u529b\u51fd\u6570\u53eb\u505a\u52a0\u6027\u6ce8\u610f\u529b\uff0c\u5b83\u7528\u4e00\u4e2a\u5355\u5c42\u795e\u7ecf\u7f51\u7edc\u6765\u8ba1\u7b97\u4e24\u4e2a\u5411\u91cf\u7684\u76f8\u4f3c\u5ea6\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u70b9\u4e58\u6ce8\u610f\u529b\u7b97\u8d77\u6765\u5feb\u4e00\u4e9b\u3002\u51fa\u4e8e\u6027\u80fd\u4e0a\u7684\u8003\u91cf\uff0c\u8bba\u6587\u4f7f\u7528\u4e86\u70b9\u4e58\u6ce8\u610f\u529b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u81ea\u6ce8\u610f\u529b\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#%E8%87%AA%E6%B3%A8%E6%84%8F%E5%8A%9B\"><\/a>\u81ea\u6ce8\u610f\u529b<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u81ea\u6ce8\u610f\u529b\u662f3.2.3\u8282\u91cc\u63d0\u53ca\u7684\u5185\u5bb9\u3002\u6211\u8ba4\u4e3a\uff0c\u5b66\u5b8c\u6ce8\u610f\u529b\u7684\u539f\u7406\u540e\uff0c\u7acb\u523b\u53bb\u5b66\u81ea\u6ce8\u610f\u529b\u80fd\u591f\u66f4\u5feb\u5730\u7406\u89e3\u6ce8\u610f\u529b\u673a\u5236\u3002\u5f53\u7136\uff0c\u8bba\u6587\u91cc\u5e76\u6ca1\u6709\u5bf9\u81ea\u6ce8\u610f\u529b\u8fdb\u884c\u8fc7\u591a\u7684\u5f15\u5165\uff0c\u521d\u5b66\u8005\u5b66\u8d77\u6765\u4f1a\u975e\u5e38\u56f0\u96be\u3002\u56e0\u6b64\uff0c\u8fd9\u91cc\u6211\u53c2\u8003\u300a\u6df1\u5ea6\u5b66\u4e60\u4e13\u9879\u300b\u91cc\u7684\u4ecb\u7ecd\u65b9\u5f0f\uff0c\u7528\u4e00\u4e2a\u66f4\u5177\u4f53\u7684\u4f8b\u5b50\u4ecb\u7ecd\u4e86\u81ea\u6ce8\u610f\u529b\u3002<\/p>\n<\/blockquote>\n\n\n\n<p>\u5927\u81f4\u660e\u767d\u4e86\u6ce8\u610f\u529b\u673a\u5236\u5176\u5b9e\u5c31\u662f\u201c\u5168\u5c40\u4fe1\u606f\u67e5\u8be2\u201d\uff0c\u5e76\u638c\u63e1\u4e86\u6ce8\u610f\u529b\u7684\u516c\u5f0f\u540e\uff0c\u6211\u4eec\u6765\u4ee5Transformer\u7684\u81ea\u6ce8\u610f\u529b\u4e3a\u4f8b\uff0c\u8fdb\u4e00\u6b65\u7406\u89e3\u6ce8\u610f\u529b\u7684\u610f\u4e49\u3002<\/p>\n\n\n\n<p>\u81ea\u6ce8\u610f\u529b\u6a21\u5757\u7684\u76ee\u7684\u662f\u4e3a\u6bcf\u4e00\u4e2a\u8f93\u5165token\u751f\u6210\u4e00\u4e2a\u5411\u91cf\u8868\u793a\uff0c\u8be5\u8868\u793a\u4e0d\u4ec5\u80fd\u53cd\u6620token\u672c\u8eab\u7684\u6027\u8d28\uff0c\u8fd8\u80fd\u53cd\u6620token\u5728\u53e5\u5b50\u91cc\u7279\u6709\u7684\u6027\u8d28\u3002\u6bd4\u5982\u7ffb\u8bd1\u201c\u7b80\u8bbf\u95ee\u975e\u6d32\u201d\u8fd9\u53e5\u8bdd\u65f6\uff0c\u7b2c\u4e09\u4e2a\u5b57\u201c\u95ee\u201d\u5728\u4e2d\u6587\u91cc\u6709\u5f88\u591a\u4e2a\u610f\u601d\uff0c\u6bd4\u5982\u8be2\u95ee\u3001\u6170\u95ee\u7b49\u3002\u6211\u4eec\u60f3\u4e3a\u5b83\u751f\u6210\u4e00\u4e2a\u8868\u793a\uff0c\u77e5\u9053\u5b83\u5728\u53e5\u5b50\u4e2d\u7684\u5177\u4f53\u610f\u601d\u3002\u800c\u5728\u4f8b\u53e5\u4e2d\uff0c\u201c\u95ee\u201d\u5b57\u7ec4\u8bcd\u7ec4\u6210\u4e86\u201c\u8bbf\u95ee\u201d\uff0c\u6240\u4ee5\u5b83\u5e94\u8be5\u53d6\u201c\u8be2\u95ee\u201d\u8fd9\u4e2a\u610f\u601d\uff0c\u800c\u4e0d\u662f\u201c\u6170\u95ee\u201d\u3002\u201c\u8be2\u95ee\u201d\u5c31\u662f\u201c\u95ee\u201d\u5b57\u5728\u8fd9\u53e5\u8bdd\u91cc\u7684\u8868\u793a\u3002<\/p>\n\n\n\n<p>\u8ba9\u6211\u4eec\u770b\u770b\u81ea\u6ce8\u610f\u529b\u6a21\u5757\u5177\u4f53\u662f\u600e\u4e48\u751f\u6210\u8fd9\u79cd\u8868\u793a\u7684\u3002\u81ea\u6ce8\u610f\u529b\u6a21\u5757\u7684\u8f93\u5165\u662f3\u4e2a\u77e9\u9635Q,K,V\u3002\u51c6\u786e\u6765\u8bf4\uff0c\u8fd9\u4e9b\u77e9\u9635\u662f\u5411\u91cf\u7684\u6570\u7ec4\uff0c\u4e5f\u5c31\u662f\u6bcf\u4e00\u4e2atoken\u7684query, key, value\u5411\u91cf\u6784\u6210\u7684\u6570\u7ec4\u3002\u81ea\u6ce8\u610f\u529b\u6a21\u5757\u4f1a\u4e3a\u6bcf\u4e00\u4e2atoken\u8f93\u51fa\u4e00\u4e2a\u5411\u91cf\u8868\u793aA\u3002A&lt;t&gt;\u662f\u7b2ct\u4e2atoken\u5728\u8fd9\u53e5\u8bdd\u91cc\u7684\u5411\u91cf\u8868\u793a\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u6211\u4eec\u5148\u522b\u7ba1token\u7684query, key, value\u7a76\u7adf\u662f\u4ec0\u4e48\u7b97\u51fa\u6765\u7684\uff0c\u540e\u6587\u4f1a\u5bf9\u6b64\u505a\u89e3\u91ca\u3002<\/p>\n<\/blockquote>\n\n\n\n<p>\u8ba9\u6211\u4eec\u8fd8\u662f\u4ee5\u521a\u521a\u90a3\u4e2a\u53e5\u5b50\u201c\u7b80\u8bbf\u95ee\u975e\u6d32\u201d\u4e3a\u4f8b\uff0c\u770b\u4e00\u4e0b\u81ea\u6ce8\u610f\u529b\u662f\u600e\u4e48\u8ba1\u7b97\u7684\u3002\u73b0\u5728\uff0c\u6211\u4eec\u60f3\u8ba1\u7b97A&lt;3&gt;\u3002A&lt;3&gt;\u8868\u793a\u7684\u662f\u201c\u95ee\u201d\u5b57\u5728\u53e5\u5b50\u91cc\u7684\u786e\u5207\u542b\u4e49\u3002\u4e3a\u4e86\u83b7\u53d6A&lt;3&gt;\uff0c\u6211\u4eec\u53ef\u4ee5\u95ee\u8fd9\u6837\u4e00\u4e2a\u53ef\u4ee5\u7528\u6570\u5b66\u8868\u8fbe\u7684\u95ee\u9898\uff1a\u201c\u548c\u2018\u95ee\u2019\u5b57\u7ec4\u8bcd\u7684\u5b57\u7684\u8bcd\u5d4c\u5165\u662f\u4ec0\u4e48\uff1f\u201d\u3002\u8fd9\u4e2a\u95ee\u9898\u5c31\u662f\u7b2c\u4e09\u4e2atoken\u7684query\u5411\u91cfq&lt;3&gt;\u3002<\/p>\n\n\n\n<p>\u548c\u201c\u95ee\u201d\u5b57\u7ec4\u8bcd\u7684\u5b57\uff0c\u5f88\u53ef\u80fd\u662f\u4e00\u4e2a\u52a8\u8bcd\u3002\u6070\u597d\uff0c\u6bcf\u4e00\u4e2atoken\u7684key&nbsp;k&lt;t&gt;\u5c31\u8868\u793a\u8fd9\u4e2atoken\u7684\u8bcd\u6027\uff1b\u6bcf\u4e00\u4e2atoken\u7684value&nbsp;v&lt;t&gt;\uff0c\u5c31\u662f\u8fd9\u4e2atoken\u7684\u5d4c\u5165\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"486\" src=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-6.jpeg\" alt=\"\" class=\"wp-image-261\" srcset=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-6.jpeg 880w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-6-300x166.jpeg 300w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-6-768x424.jpeg 768w\" sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/figure>\n\n\n\n<p>\u8fd9\u6837\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u6839\u636e\u6bcf\u4e2a\u5b57\u7684\u8bcd\u6027\uff08key\uff09\uff0c\u5c3d\u91cf\u53bb\u627e\u52a8\u8bcd\uff08\u548cquery\u6bd4\u8f83\u76f8\u4f3c\u7684key\uff09\uff0c\u6c42\u51fa\u6743\u91cd\uff08query\u548ckey\u505a\u70b9\u4e58\u518d\u505asoftmax\uff09\uff0c\u5bf9\u6240\u6709value\u6c42\u4e00\u4e2a\u52a0\u6743\u5e73\u5747\uff0c\u5c31\u5dee\u4e0d\u591a\u80fd\u56de\u7b54\u95ee\u9898q&lt;3&gt;\u4e86\u3002<\/p>\n\n\n\n<p>\u7ecf\u8ba1\u7b97\uff0cq&lt;3&gt;,k&lt;2&gt;\u53ef\u80fd\u4f1a\u6bd4\u8f83\u76f8\u5173\uff0c\u5373\u8fd9\u4e24\u4e2a\u5411\u91cf\u7684\u5185\u79ef\u6bd4\u8f83\u5927\u3002\u56e0\u6b64\uff0c\u6700\u7ec8\u7b97\u51fa\u6765\u7684A&lt;3&gt;\u5e94\u8be5\u7ea6\u7b49\u4e8ev&lt;2&gt;\uff0c\u5373\u95ee\u9898\u201c\u54ea\u4e2a\u5b57\u548c\u2018\u95ee\u2019\u5b57\u7ec4\u8bcd\u4e86\uff1f\u201d\u7684\u7b54\u6848\u662f\u7b2c\u4e8c\u4e2a\u5b57\u201c\u8bbf\u201d\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"853\" height=\"486\" src=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-7.jpeg\" alt=\"\" class=\"wp-image-262\" srcset=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-7.jpeg 853w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-7-300x171.jpeg 300w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-7-768x438.jpeg 768w\" sizes=\"auto, (max-width: 853px) 100vw, 853px\" \/><\/figure>\n\n\n\n<p>\u8fd9\u662fA&lt;3&gt;\u7684\u8ba1\u7b97\u8fc7\u7a0b\u3002\u51c6\u786e\u6765\u8bf4\uff0cA&lt;3&gt;=A(q&lt;3&gt;,K,V)\u3002\u7c7b\u4f3c\u5730\uff0c\u5230A&lt;1&gt;\u5230A&lt;5&gt;\u90fd\u662f\u7528\u8fd9\u4e2a\u516c\u5f0f\u6765\u8ba1\u7b97\u3002\u628a\u6240\u6709A\u7684\u8ba1\u7b97\u5408\u8d77\u6765\uff0c\u628aq\u5408\u8d77\u6765\uff0c\u5f97\u5230\u7684\u516c\u5f0f\u5c31\u662f\u6ce8\u610f\u529b\u7684\u516c\u5f0f\u3002Attention(Q,K,V)=softmax(QKTdk)V<\/p>\n\n\n\n<p>\u4ece\u4e0a\u4e00\u8282\u4e2d\uff0c\u6211\u4eec\u77e5\u9053\u4e86\u6ce8\u610f\u529b\u5176\u5b9e\u5c31\u662f\u5168\u5c40\u4fe1\u606f\u67e5\u8be2\u3002\u800c\u5728\u8fd9\u4e00\u8282\uff0c\u6211\u4eec\u77e5\u9053\u4e86\u6ce8\u610f\u529b\u7684\u4e00\u79cd\u5e94\u7528\uff1a\u901a\u8fc7\u8ba9\u4e00\u53e5\u8bdd\u4e2d\u7684\u6bcf\u4e2a\u5355\u8bcd\u53bb\u5411\u5176\u4ed6\u5355\u8bcd\u67e5\u8be2\u4fe1\u606f\uff0c\u6211\u4eec\u80fd\u4e3a\u6bcf\u4e00\u4e2a\u5355\u8bcd\u751f\u6210\u4e00\u4e2a\u66f4\u6709\u610f\u4e49\u7684\u5411\u91cf\u8868\u793a\u3002<\/p>\n\n\n\n<p>\u53ef\u662f\uff0c\u6211\u4eec\u8fd8\u7559\u4e86\u4e00\u4e2a\u95ee\u9898\u6ca1\u6709\u89e3\u51b3\uff1a\u6bcf\u4e2a\u5355\u8bcd\u7684query, key, value\u662f\u600e\u4e48\u5f97\u6765\u7684\uff1f\u8fd9\u5c31\u8981\u770bTransformer\u91cc\u7684\u53e6\u4e00\u79cd\u673a\u5236\u4e86\u2014\u2014\u591a\u5934\u6ce8\u610f\u529b\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u591a\u5934\u6ce8\u610f\u529b-\uff083-2-2\u8282\uff09\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#%E5%A4%9A%E5%A4%B4%E6%B3%A8%E6%84%8F%E5%8A%9B-%EF%BC%883-2-2%E8%8A%82%EF%BC%89\"><\/a>\u591a\u5934\u6ce8\u610f\u529b \uff083.2.2\u8282\uff09<\/h3>\n\n\n\n<p>\u5728\u81ea\u6ce8\u610f\u529b\u4e2d\uff0c\u6bcf\u4e00\u4e2a\u5355\u8bcd\u7684query, key, value\u5e94\u8be5\u53ea\u548c\u8be5\u5355\u8bcd\u672c\u8eab\u6709\u5173\u3002\u56e0\u6b64\uff0c\u8fd9\u4e09\u4e2a\u5411\u91cf\u90fd\u5e94\u8be5\u7531\u5355\u8bcd\u7684\u8bcd\u5d4c\u5165\u5f97\u5230\u3002\u53e6\u5916\uff0c\u6bcf\u4e2a\u5355\u8bcd\u7684query, key, value\u4e0d\u5e94\u8be5\u662f\u4eba\u5de5\u6307\u5b9a\u7684\uff0c\u800c\u5e94\u8be5\u662f\u53ef\u5b66\u4e60\u7684\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u53ef\u5b66\u4e60\u7684\u53c2\u6570\u6765\u63cf\u8ff0\u4ece\u8bcd\u5d4c\u5165\u5230query, key, value\u7684\u53d8\u6362\u8fc7\u7a0b\u3002\u7efc\u4e0a\uff0c\u81ea\u6ce8\u610f\u529b\u7684\u8f93\u5165Q,K,V\u5e94\u8be5\u7528\u4e0b\u9762\u8fd9\u4e2a\u516c\u5f0f\u8ba1\u7b97\uff1a{Q=EWQK=EWKV=EWV<\/p>\n\n\n\n<p>\u5176\u4e2d\uff0cE\u662f\u8bcd\u5d4c\u5165\u77e9\u9635\uff0c\u4e5f\u5c31\u662f\u6bcf\u4e2a\u5355\u8bcd\u7684\u8bcd\u5d4c\u5165\u7684\u6570\u7ec4\uff1bWQ,WK,WV\u662f\u53ef\u5b66\u4e60\u7684\u53c2\u6570\u77e9\u9635\u3002\u5728Transformer\u4e2d\uff0c\u5927\u90e8\u5206\u4e2d\u95f4\u5411\u91cf\u7684\u957f\u5ea6\u90fd\u7528dmodel\u8868\u793a\uff0c\u8bcd\u5d4c\u5165\u7684\u957f\u5ea6\u4e5f\u662fdmodel\u3002\u56e0\u6b64\uff0c\u8bbe\u8f93\u5165\u7684\u53e5\u5b50\u957f\u5ea6\u4e3an\uff0c\u5219E\u7684\u5f62\u72b6\u662fn\u00d7dmodel\uff0cWQ,WK\u7684\u5f62\u72b6\u662fdmodel\u00d7dk\uff0cWV\u7684\u5f62\u72b6\u662fdmodel\u00d7dv\u3002<\/p>\n\n\n\n<p>\u5c31\u50cf\u5377\u79ef\u5c42\u80fd\u591f\u7528\u591a\u4e2a\u5377\u79ef\u6838\u751f\u6210\u591a\u4e2a\u901a\u9053\u7684\u7279\u5f81\u4e00\u6837\uff0c\u6211\u4eec\u4e5f\u7528\u591a\u7ec4WQ,WK,WV\u751f\u6210\u591a\u7ec4\u81ea\u6ce8\u610f\u529b\u7ed3\u679c\u3002\u8fd9\u6837\uff0c\u6bcf\u4e2a\u5355\u8bcd\u7684\u81ea\u6ce8\u610f\u529b\u8868\u793a\u4f1a\u66f4\u4e30\u5bcc\u4e00\u70b9\u3002\u8fd9\u79cd\u673a\u5236\u5c31\u53eb\u505a\u591a\u5934\u6ce8\u610f\u529b\u3002\u628a\u591a\u5934\u6ce8\u610f\u529b\u7528\u5728\u81ea\u6ce8\u610f\u529b\u4e0a\u7684\u516c\u5f0f\u4e3a\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Transformer\u4f3c\u4e4e\u9ed8\u8ba4\u6240\u6709\u5411\u91cf\u90fd\u662f\u884c\u5411\u91cf\uff0c\u53c2\u6570\u77e9\u9635\u90fd\u5199\u6210\u4e86\u53f3\u4e58\u800c\u4e0d\u662f\u5e38\u89c1\u7684\u5de6\u4e58\u3002<\/p>\n<\/blockquote>\n\n\n\n<p>headi=Attention(EWiQ,EWiK,EWiV)MultiHeadSelfAttention(E)=Concat(head1,&#8230;headh)WO<\/p>\n\n\n\n<p>\u5176\u4e2d\uff0ch\u662f\u591a\u5934\u81ea\u6ce8\u610f\u529b\u7684\u201c\u5934\u201d\u6570\uff0cWO\u662f\u53e6\u4e00\u4e2a\u53c2\u6570\u77e9\u9635\u3002\u591a\u5934\u6ce8\u610f\u529b\u6a21\u5757\u7684\u8f93\u5165\u8f93\u51fa\u5411\u91cf\u7684\u957f\u5ea6\u90fd\u662fdmodel\u3002\u56e0\u6b64\uff0cWO\u7684\u5f62\u72b6\u662fhdv\u00d7dmodel\uff08\u81ea\u6ce8\u610f\u529b\u7684\u8f93\u51fa\u957f\u5ea6\u662fdv\uff0c\u6709h\u4e2a\u8f93\u51fa\uff09\u3002\u5728\u8bba\u6587\u4e2d\uff0cTransfomer\u7684\u9ed8\u8ba4\u53c2\u6570\u914d\u7f6e\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>dmodel=512<\/li>\n\n\n\n<li>h=8<\/li>\n\n\n\n<li>dk=dv=dmodel\/h=64<\/li>\n<\/ul>\n\n\n\n<p>\u5b9e\u9645\u4e0a\uff0c\u591a\u5934\u6ce8\u610f\u529b\u673a\u5236\u4e0d\u4ec5\u4ec5\u53ef\u4ee5\u7528\u5728\u8ba1\u7b97\u81ea\u6ce8\u610f\u529b\u4e0a\u3002\u63a8\u5e7f\u4e00\u4e0b\uff0c\u5982\u679c\u628a\u591a\u5934\u81ea\u6ce8\u610f\u529b\u7684\u8f93\u5165E\u62c6\u6210\u4e09\u4e2a\u77e9\u9635Q,K,V\uff0c\u5219\u591a\u5934\u6ce8\u610f\u529b\u7684\u516c\u5f0f\u4e3a\uff1aheadi=Attention(QWiQ,KWiK,VWiV)MultiHeadAttention(Q,K,V)=Concat(head1,&#8230;headh)WO<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"Transformer-\u6a21\u578b\u67b6\u6784\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#Transformer-%E6%A8%A1%E5%9E%8B%E6%9E%B6%E6%9E%84\"><\/a>Transformer \u6a21\u578b\u67b6\u6784<\/h2>\n\n\n\n<p>\u770b\u61c2\u4e86\u6ce8\u610f\u529b\u673a\u5236\uff0c\u53ef\u4ee5\u56de\u8fc7\u5934\u9605\u8bfb3.1\u8282\u5b66\u4e60Transformer\u7684\u6574\u4f53\u67b6\u6784\u4e86\u3002<\/p>\n\n\n\n<p>\u8bba\u6587\u91cc\u7684\u56fe1\u662fTransformer\u7684\u67b6\u6784\u56fe\u3002\u7136\u800c\uff0c\u7531\u4e8e\u6211\u4eec\u6ca1\u8bfb\u540e\u9762\u7684\u7ae0\u8282\uff0c\u6709\u4e00\u4e9b\u6a21\u5757\u8fd8\u6ca1\u6709\u89c1\u8fc7\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u8fd9\u8f6e\u9605\u8bfb\u7684\u65f6\u5019\u53ef\u4ee5\u53ea\u5173\u6ce8\u6a21\u578b\u4e3b\u5e72\uff0c\u641e\u61c2encoder\u548cdecoder\u4e4b\u95f4\u662f\u600e\u4e48\u7ec4\u7ec7\u8d77\u6765\u7684\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"606\" height=\"707\" src=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-3.jpeg\" alt=\"\" class=\"wp-image-258\" srcset=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-3.jpeg 606w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-3-257x300.jpeg 257w\" sizes=\"auto, (max-width: 606px) 100vw, 606px\" \/><\/figure>\n\n\n\n<p>\u6211\u4eec\u73b0\u5728\u4ec5\u77e5\u9053\u591a\u5934\u6ce8\u610f\u529b\u6a21\u5757\u7684\u539f\u7406\uff0c\u5bf9\u6a21\u578b\u4e3b\u5e72\u4e2d\u7684\u4e09\u4e2a\u6a21\u5757\u8fd8\u6709\u7591\u95ee\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Add &amp; Norm<\/li>\n\n\n\n<li>Feed Forward<\/li>\n\n\n\n<li>\u4e3a\u4ec0\u4e48\u4e00\u4e2a\u591a\u5934\u6ce8\u610f\u529b\u524d\u9762\u52a0\u4e86Masked<\/li>\n<\/ol>\n\n\n\n<p>\u6211\u4eec\u6765\u4f9d\u6b21\u770b\u61c2\u8fd9\u4e09\u4e2a\u6a21\u5757\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u6b8b\u5dee\u8fde\u63a5\uff083-1\u8282\uff09\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#%E6%AE%8B%E5%B7%AE%E8%BF%9E%E6%8E%A5%EF%BC%883-1%E8%8A%82%EF%BC%89\"><\/a>\u6b8b\u5dee\u8fde\u63a5\uff083.1\u8282\uff09<\/h3>\n\n\n\n<p>Transformer\u4f7f\u7528\u4e86\u548cResNet\u7c7b\u4f3c\u7684\u6b8b\u5dee\u8fde\u63a5\uff0c\u5373\u8bbe\u6a21\u5757\u672c\u8eab\u7684\u6620\u5c04\u4e3aF(x)\uff0c\u5219\u6a21\u5757\u8f93\u51fa\u4e3aNormalization(F(x)+x)\u3002\u548cResNet\u4e0d\u540c\uff0cTransformer\u4f7f\u7528\u7684\u5f52\u4e00\u5316\u65b9\u6cd5\u662fLayerNorm\u3002<\/p>\n\n\n\n<p>\u53e6\u5916\u8981\u6ce8\u610f\u7684\u662f\uff0c\u6b8b\u5dee\u8fde\u63a5\u6709\u4e00\u4e2a\u8981\u6c42\uff1a\u8f93\u5165x\u548c\u8f93\u51faF(x)+x\u7684\u7ef4\u5ea6\u5fc5\u987b\u7b49\u957f\u3002\u5728Transformer\u4e2d\uff0c\u5305\u62ec\u6240\u6709\u8bcd\u5d4c\u5165\u5728\u5185\u7684\u5411\u91cf\u957f\u5ea6\u90fd\u662fdmodel=512\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u524d\u9988\u7f51\u7edc\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#%E5%89%8D%E9%A6%88%E7%BD%91%E7%BB%9C\"><\/a>\u524d\u9988\u7f51\u7edc<\/h3>\n\n\n\n<p>\u67b6\u6784\u56fe\u4e2d\u7684\u524d\u9988\u7f51\u7edc\uff08Feed Forward\uff09\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u5168\u8fde\u63a5\u7f51\u7edc\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u8fd9\u4e2a\u5b50\u7f51\u7edc\u7531\u4e24\u4e2a\u7ebf\u6027\u5c42\u7ec4\u6210\uff0c\u4e2d\u95f4\u7528ReLU\u4f5c\u4e3a\u6fc0\u6d3b\u51fd\u6570\u3002FFN(x)=max(0,xW1+b1)W2+b2<\/p>\n\n\n\n<p>\u4e2d\u95f4\u7684\u9690\u85cf\u5c42\u7684\u7ef4\u5ea6\u6570\u8bb0\u4f5cdff\u3002\u9ed8\u8ba4dff=2048\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u6574\u4f53\u67b6\u6784\u4e0e\u63a9\u7801\u591a\u5934\u6ce8\u610f\u529b\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#%E6%95%B4%E4%BD%93%E6%9E%B6%E6%9E%84%E4%B8%8E%E6%8E%A9%E7%A0%81%E5%A4%9A%E5%A4%B4%E6%B3%A8%E6%84%8F%E5%8A%9B\"><\/a>\u6574\u4f53\u67b6\u6784\u4e0e\u63a9\u7801\u591a\u5934\u6ce8\u610f\u529b<\/h3>\n\n\n\n<p>\u73b0\u5728\uff0c\u6211\u4eec\u57fa\u672c\u80fd\u770b\u61c2\u6a21\u578b\u7684\u6574\u4f53\u67b6\u6784\u4e86\u3002\u53ea\u6709\u8bfb\u61c2\u4e86\u6574\u4e2a\u6a21\u578b\u7684\u8fd0\u884c\u539f\u7406\uff0c\u6211\u4eec\u624d\u80fd\u641e\u61c2\u591a\u5934\u6ce8\u610f\u529b\u524d\u9762\u7684masked\u662f\u54ea\u6765\u7684\u3002<\/p>\n\n\n\n<p>\u8bba\u6587\u7b2c3\u7ae0\u5f00\u5934\u4ecb\u7ecd\u4e86\u6a21\u578b\u7684\u8fd0\u884c\u539f\u7406\u3002\u548c\u591a\u6570\u5f3a\u529b\u7684\u5e8f\u5217\u8f6c\u6362\u6a21\u578b\u4e00\u6837\uff0cTransformer\u4f7f\u7528\u4e86encoder-decoder\u7684\u67b6\u6784\u3002\u65e9\u671f\u57fa\u4e8eRNN\u7684\u5e8f\u5217\u8f6c\u6362\u6a21\u578b\u5728\u751f\u6210\u5e8f\u5217\u65f6\u4e00\u822c\u4f1a\u8f93\u5165\u524di\u4e2a\u5355\u8bcd\uff0c\u8f93\u51fa\u7b2ci+1\u4e2a\u5355\u8bcd\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"826\" height=\"167\" src=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-2.jpeg\" alt=\"\" class=\"wp-image-257\" srcset=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-2.jpeg 826w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-2-300x61.jpeg 300w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-2-768x155.jpeg 768w\" sizes=\"auto, (max-width: 826px) 100vw, 826px\" \/><\/figure>\n\n\n\n<p>\u800cTransformer\u4e0d\u540c\u3002\u5bf9\u4e8e\u8f93\u5165\u5e8f\u5217(x1,\u2026,xs)\uff0c\u5b83\u4f1a\u88ab\u7f16\u7801\u5668\u7f16\u7801\u6210\u4e2d\u95f4\u8868\u793a&nbsp;z=(z1,\u2026,zs)\u3002\u7ed9\u5b9az\u7684\u524d\u63d0\u4e0b\uff0c\u89e3\u7801\u5668\u8f93\u5165(y1,\u2026,yt)\uff0c\u8f93\u51fa(y2,\u2026,yt+1)\u7684\u9884\u6d4b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1126\" height=\"692\" src=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-5.jpeg\" alt=\"\" class=\"wp-image-260\" srcset=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-5.jpeg 1126w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-5-300x184.jpeg 300w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-5-1024x629.jpeg 1024w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-5-768x472.jpeg 768w\" sizes=\"auto, (max-width: 1126px) 100vw, 1126px\" \/><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Transformer \u9ed8\u8ba4\u4f1a\u5e76\u884c\u5730\u8f93\u51fa\u7ed3\u679c\u3002\u800c\u5728\u63a8\u7406\u65f6\uff0c\u5e8f\u5217\u5fc5\u987b\u5f97\u4e32\u884c\u751f\u6210\u3002\u76f4\u63a5\u8c03\u7528Transformer\u7684\u5e76\u884c\u8f93\u51fa\u903b\u8f91\u4f1a\u4ea7\u751f\u975e\u5e38\u591a\u7684\u5197\u4f59\u8fd0\u7b97\u91cf\u3002\u63a8\u7406\u7684\u4ee3\u7801\u5b9e\u73b0\u53ef\u4ee5\u8fdb\u884c\u4f18\u5316\u3002<\/p>\n<\/blockquote>\n\n\n\n<p>\u5177\u4f53\u6765\u8bf4\uff0c\u8f93\u5165\u5e8f\u5217x\u4f1a\u7ecf\u8fc7N=6\u4e2a\u7ed3\u6784\u76f8\u540c\u7684\u5c42\u3002\u6bcf\u5c42\u7531\u591a\u4e2a\u5b50\u5c42\u7ec4\u6210\u3002\u7b2c\u4e00\u4e2a\u5b50\u5c42\u662f\u591a\u5934\u6ce8\u610f\u529b\u5c42\uff0c\u51c6\u786e\u6765\u8bf4\uff0c\u662f\u591a\u5934\u81ea\u6ce8\u610f\u529b\u3002\u8fd9\u4e00\u5c42\u53ef\u4ee5\u4e3a\u6bcf\u4e00\u4e2a\u8f93\u5165\u5355\u8bcd\u63d0\u53d6\u51fa\u66f4\u6709\u610f\u4e49\u7684\u8868\u793a\u3002\u4e4b\u540e\u6570\u636e\u4f1a\u7ecf\u8fc7\u524d\u9988\u7f51\u7edc\u5b50\u5c42\u3002\u6700\u7ec8\uff0c\u8f93\u51fa\u7f16\u7801\u7ed3\u679cz\u3002<\/p>\n\n\n\n<p>\u5f97\u5230\u4e86z\u540e\uff0c\u8981\u7528\u89e3\u7801\u5668\u8f93\u51fa\u7ed3\u679c\u4e86\u3002\u89e3\u7801\u5668\u7684\u8f93\u5165\u662f\u5f53\u524d\u5df2\u7ecf\u751f\u6210\u7684\u5e8f\u5217\uff0c\u8be5\u5e8f\u5217\u4f1a\u7ecf\u8fc7\u4e00\u4e2a\u63a9\u7801\uff08masked\uff09\u591a\u5934\u81ea\u6ce8\u610f\u529b\u5b50\u5c42\u3002\u6211\u4eec\u5148\u4e0d\u7ba1\u8fd9\u4e2a\u63a9\u7801\u662f\u4ec0\u4e48\u610f\u601d\uff0c\u6682\u4e14\u628a\u5b83\u5f53\u6210\u666e\u901a\u7684\u591a\u5934\u81ea\u6ce8\u610f\u529b\u5c42\u3002\u5b83\u7684\u4f5c\u7528\u548c\u7f16\u7801\u5668\u4e2d\u7684\u4e00\u6837\uff0c\u7528\u4e8e\u63d0\u53d6\u51fa\u66f4\u6709\u610f\u4e49\u7684\u8868\u793a\u3002<\/p>\n\n\n\n<p>\u63a5\u4e0b\u6765\uff0c\u6570\u636e\u8fd8\u4f1a\u7ecf\u8fc7\u4e00\u4e2a\u591a\u5934\u6ce8\u610f\u529b\u5c42\u3002\u8fd9\u4e2a\u5c42\u6bd4\u8f83\u7279\u522b\uff0c\u5b83\u7684K\uff0cV\u6765\u81eaz\uff0cQ\u6765\u81ea\u4e0a\u4e00\u5c42\u7684\u8f93\u51fa\u3002\u4e3a\u4ec0\u4e48\u4f1a\u6709\u8fd9\u6837\u7684\u8bbe\u8ba1\u5462\uff1f\u8fd9\u79cd\u8bbe\u8ba1\u6765\u81ea\u4e8e\u65e9\u671f\u7684\u6ce8\u610f\u529b\u6a21\u578b\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u5728\u65e9\u671f\u7684\u6ce8\u610f\u529b\u6a21\u578b\u4e2d\uff0c\u6bcf\u4e00\u4e2a\u8f93\u51fa\u5355\u8bcd\u90fd\u4f1a\u4e0e\u6bcf\u4e00\u4e2a\u8f93\u5165\u5355\u8bcd\u6c42\u4e00\u4e2a\u6ce8\u610f\u529b\uff0c\u4ee5\u627e\u5230\u6bcf\u4e00\u4e2a\u8f93\u51fa\u5355\u8bcd\u6700\u76f8\u5173\u7684\u67d0\u51e0\u4e2a\u8f93\u5165\u5355\u8bcd\u3002\u7528\u6ce8\u610f\u529b\u516c\u5f0f\u6765\u8868\u8fbe\u7684\u8bdd\uff0cQ\u5c31\u662f\u8f93\u51fa\u5355\u8bcd\uff0cK, V\u5c31\u662f\u8f93\u5165\u5355\u8bcd\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1023\" height=\"544\" src=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-12.jpeg\" alt=\"\" class=\"wp-image-268\" srcset=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-12.jpeg 1023w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-12-300x160.jpeg 300w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-12-768x408.jpeg 768w\" sizes=\"auto, (max-width: 1023px) 100vw, 1023px\" \/><\/figure>\n\n\n\n<p>\u7ecf\u8fc7\u7b2c\u4e8c\u4e2a\u591a\u5934\u6ce8\u610f\u529b\u5c42\u540e\uff0c\u548c\u7f16\u7801\u5668\u4e00\u6837\uff0c\u6570\u636e\u4f1a\u7ecf\u8fc7\u4e00\u4e2a\u524d\u9988\u7f51\u7edc\u3002\u6700\u7ec8\uff0c\u7f51\u7edc\u5e76\u884c\u8f93\u51fa\u5404\u4e2a\u65f6\u523b\u7684\u4e0b\u4e00\u4e2a\u5355\u8bcd\u3002<\/p>\n\n\n\n<p>\u8fd9\u79cd\u5e76\u884c\u8ba1\u7b97\u6709\u4e00\u4e2a\u8981\u6ce8\u610f\u7684\u5730\u65b9\u3002\u5728\u8f93\u51fa\u7b2ct+1\u4e2a\u5355\u8bcd\u65f6\uff0c\u6a21\u578b\u4e0d\u5e94\u8be5\u63d0\u524d\u77e5\u9053t+1\u65f6\u523b\u4e4b\u540e\u7684\u4fe1\u606f\u3002\u56e0\u6b64\uff0c\u5e94\u8be5\u53ea\u4fdd\u7559t\u65f6\u523b\u4e4b\u524d\u7684\u4fe1\u606f\uff0c\u906e\u4f4f\u540e\u9762\u7684\u8f93\u5165\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u63a9\u7801\u5b9e\u73b0\u3002\u6dfb\u52a0\u63a9\u7801\u7684\u4e00\u4e2a\u4e0d\u4e25\u8c28\u7684\u793a\u4f8b\u5982\u4e0b\u8868\u6240\u793a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u8f93\u5165<\/th><th>\u8f93\u51fa<\/th><\/tr><\/thead><tbody><tr><td>(y1,&nbsp;<del>y2, y3, y4<\/del>)<\/td><td>y2<\/td><\/tr><tr><td>(y1, y2,&nbsp;<del>y3, y4<\/del>)<\/td><td>y3<\/td><\/tr><tr><td>(y1, y2, y3,&nbsp;<del>y4<\/del>)<\/td><td>y4<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u89e3\u7801\u5668\u7684\u591a\u5934\u81ea\u6ce8\u610f\u529b\u5c42\u524d\u9762\u6709\u4e00\u4e2amasked\u3002\u5728\u8bba\u6587\u4e2d\uff0cmask\u662f\u901a\u8fc7\u4ee4\u6ce8\u610f\u529b\u516c\u5f0f\u7684softmax\u7684\u8f93\u5165\u4e3a\u2212\u221e\u6765\u5b9e\u73b0\u7684\uff08softmax\u7684\u8f93\u5165\u4e3a\u2212\u221e\uff0c\u6ce8\u610f\u529b\u6743\u91cd\u5c31\u51e0\u4e4e\u4e3a0\uff0c\u88ab\u906e\u4f4f\u7684\u8f93\u51fa\u4e5f\u51e0\u4e4e\u5168\u90e8\u4e3a0\uff09\u3002\u6bcf\u4e2amask\u90fd\u662f\u4e00\u4e2a\u4e0a\u4e09\u89d2\u77e9\u9635\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u5d4c\u5165\u5c42\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#%E5%B5%8C%E5%85%A5%E5%B1%82\"><\/a>\u5d4c\u5165\u5c42<\/h3>\n\n\n\n<p>\u770b\u5b8c\u4e86Transformer\u7684\u4e3b\u5e72\u7ed3\u6784\uff0c\u518d\u6765\u770b\u770b\u8f93\u5165\u8f93\u51fa\u505a\u4e86\u54ea\u4e9b\u524d\u540e\u5904\u7406\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"539\" height=\"736\" src=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-13.jpeg\" alt=\"\" class=\"wp-image-266\" srcset=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-13.jpeg 539w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-13-220x300.jpeg 220w\" sizes=\"auto, (max-width: 539px) 100vw, 539px\" \/><\/figure>\n\n\n\n<p>\u548c\u5176\u4ed6\u5927\u591a\u6570\u5e8f\u5217\u8f6c\u6362\u4efb\u52a1\u4e00\u6837\uff0cTransformer\u4e3b\u5e72\u7ed3\u6784\u7684\u8f93\u5165\u8f93\u51fa\u90fd\u662f\u8bcd\u5d4c\u5165\u5e8f\u5217\u3002\u8bcd\u5d4c\u5165\uff0c\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u628aone-hot\u5411\u91cf\u8f6c\u6362\u6210\u6709\u610f\u4e49\u7684\u5411\u91cf\u7684\u8f6c\u6362\u77e9\u9635\u3002\u5728Transformer\u4e2d\uff0c\u89e3\u7801\u5668\u7684\u5d4c\u5165\u5c42\u548c\u8f93\u51fa\u7ebf\u6027\u5c42\u662f\u5171\u4eab\u6743\u91cd\u7684\u2014\u2014\u8f93\u51fa\u7ebf\u6027\u5c42\u8868\u793a\u7684\u7ebf\u6027\u53d8\u6362\u662f\u5d4c\u5165\u5c42\u7684\u9006\u53d8\u6362\uff0c\u5176\u76ee\u7684\u662f\u628a\u7f51\u7edc\u8f93\u51fa\u7684\u5d4c\u5165\u518d\u8f6c\u6362\u56deone-hot\u5411\u91cf\u3002\u5982\u679c\u67d0\u4efb\u52a1\u7684\u8f93\u5165\u548c\u8f93\u51fa\u662f\u540c\u4e00\u79cd\u8bed\u8a00\uff0c\u90a3\u4e48\u7f16\u7801\u5668\u7684\u5d4c\u5165\u5c42\u548c\u89e3\u7801\u5668\u7684\u5d4c\u5165\u5c42\u4e5f\u53ef\u4ee5\u5171\u4eab\u6743\u91cd\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u8bba\u6587\u4e2d\u5199\u9053\uff1a\u201c\u8f93\u5165\u8f93\u51fa\u7684\u5d4c\u5165\u5c42\u548csoftmax\u524d\u7684\u7ebf\u6027\u5c42\u5171\u4eab\u6743\u91cd\u201d\u3002\u8fd9\u4e2a\u63cf\u8ff0\u4e0d\u591f\u6e05\u695a\u3002\u5982\u679c\u8f93\u5165\u548c\u8f93\u51fa\u7684\u4e0d\u662f\u540c\u4e00\u79cd\u8bed\u8a00\uff0c\u6bd4\u5982\u8f93\u5165\u4e2d\u6587\u8f93\u51fa\u82f1\u6587\uff0c\u90a3\u4e48\u5171\u4eab\u4e00\u4e2a\u8bcd\u5d4c\u5165\u662f\u6ca1\u6709\u610f\u4e49\u7684\u3002<\/p>\n<\/blockquote>\n\n\n\n<p>\u5d4c\u5165\u77e9\u9635\u7684\u6743\u91cd\u4e58\u4e86\u4e00\u4e2admodel\u3002<\/p>\n\n\n\n<p>\u7531\u4e8e\u6a21\u578b\u8981\u9884\u6d4b\u4e00\u4e2a\u5355\u8bcd\uff0c\u8f93\u51fa\u7684\u7ebf\u6027\u5c42\u540e\u9762\u8fd8\u6709\u4e00\u4e2a\u5e38\u89c4\u7684softmax\u64cd\u4f5c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u4f4d\u7f6e\u7f16\u7801\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#%E4%BD%8D%E7%BD%AE%E7%BC%96%E7%A0%81\"><\/a>\u4f4d\u7f6e\u7f16\u7801<\/h3>\n\n\n\n<p>\u73b0\u5728\uff0cTransformer\u7684\u7ed3\u6784\u56fe\u8fd8\u5269\u4e00\u4e2a\u6a21\u5757\u6ca1\u6709\u8bfb\u2014\u2014\u4f4d\u7f6e\u7f16\u7801\u3002\u65e0\u8bba\u662fRNN\u8fd8\u662fCNN\uff0c\u90fd\u80fd\u81ea\u7136\u5730\u5229\u7528\u5230\u5e8f\u5217\u7684\u5148\u540e\u987a\u5e8f\u8fd9\u4e00\u4fe1\u606f\u3002\u7136\u800c\uff0cTransformer\u7684\u4e3b\u5e72\u7f51\u7edc\u5e76\u4e0d\u80fd\u5229\u7528\u5230\u5e8f\u5217\u987a\u5e8f\u4fe1\u606f\u3002\u56e0\u6b64\uff0cTransformer\u4f7f\u7528\u4e86\u4e00\u79cd\u53eb\u505a\u201c\u4f4d\u7f6e\u7f16\u7801\u201d\u7684\u673a\u5236\uff0c\u5bf9\u7f16\u7801\u5668\u548c\u89e3\u7801\u5668\u7684\u5d4c\u5165\u8f93\u5165\u505a\u4e86\u4e00\u4e9b\u4fee\u6539\uff0c\u4ee5\u5411\u6a21\u578b\u63d0\u4f9b\u5e8f\u5217\u987a\u5e8f\u4fe1\u606f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"539\" height=\"736\" src=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-9.jpeg\" alt=\"\" class=\"wp-image-264\" srcset=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-9.jpeg 539w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-9-220x300.jpeg 220w\" sizes=\"auto, (max-width: 539px) 100vw, 539px\" \/><\/figure>\n\n\n\n<p>\u5d4c\u5165\u5c42\u7684\u8f93\u51fa\u662f\u4e00\u4e2a\u5411\u91cf\u6570\u7ec4\uff0c\u5373\u8bcd\u5d4c\u5165\u5411\u91cf\u7684\u5e8f\u5217\u3002\u8bbe\u6570\u7ec4\u7684\u4f4d\u7f6e\u53ebpos\uff0c\u5411\u91cf\u7684\u67d0\u4e00\u7ef4\u53ebi\u3002\u6211\u4eec\u4e3a\u6bcf\u4e00\u4e2a\u5411\u91cf\u91cc\u7684\u6bcf\u4e00\u4e2a\u6570\u6dfb\u52a0\u4e00\u4e2a\u5b9e\u6570\u7f16\u7801\uff0c\u8fd9\u79cd\u7f16\u7801\u65b9\u5f0f\u8981\u6ee1\u8db3\u4ee5\u4e0b\u6027\u8d28\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5bf9\u4e8e\u540c\u4e00\u4e2apos\u4e0d\u540c\u7684i\uff0c\u5373\u5bf9\u4e8e\u4e00\u4e2a\u8bcd\u5d4c\u5165\u5411\u91cf\u7684\u4e0d\u540c\u5143\u7d20\uff0c\u5b83\u4eec\u7684\u7f16\u7801\u8981\u5404\u4e0d\u76f8\u540c\u3002<\/li>\n\n\n\n<li>\u5bf9\u4e8e\u5411\u91cf\u7684\u540c\u4e00\u4e2a\u7ef4\u5ea6\u5904\uff0c\u4e0d\u540cpos\u7684\u7f16\u7801\u4e0d\u540c\u3002\u4e14pos\u95f4\u8981\u6ee1\u8db3\u76f8\u5bf9\u5173\u7cfb\uff0c\u5373f(pos+1)\u2212f(pos)=f(pos)\u2212f(pos\u22121)\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u8981\u6ee1\u8db3\u8fd9\u4e24\u79cd\u6027\u8d28\u7684\u8bdd\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u8bbe\u8ba1\u4e00\u79cd\u7f16\u7801\u51fd\u6570:Encoding(pos,i)=pos1000i<\/p>\n\n\n\n<p>\u5373\u5bf9\u4e8e\u6bcf\u4e00\u4e2a\u4f4d\u7f6ei\uff0c\u7528\u5c0f\u6570\u70b9\u540e\u76843\u4e2a\u5341\u8fdb\u5236\u6570\u4f4d\u6765\u8868\u793a\u4e0d\u540c\u7684pos\u3002pos\u4e4b\u95f4\u4e5f\u6ee1\u8db3\u76f8\u5bf9\u5173\u7cfb\u3002<\/p>\n\n\n\n<p>\u4f46\u662f\uff0c\u8fd9\u79cd\u7f16\u7801\u4e0d\u5229\u4e8e\u7f51\u7edc\u7684\u5b66\u4e60\u3002\u6211\u4eec\u66f4\u5e0c\u671b\u6240\u6709\u7f16\u7801\u90fd\u5dee\u4e0d\u591a\u5927\u5c0f\uff0c\u4e14\u90fd\u4f4d\u4e8e0~1\u4e4b\u95f4\u3002\u4e3a\u6b64\uff0cTransformer\u4f7f\u7528\u4e86\u4e09\u89d2\u51fd\u6570\u4f5c\u4e3a\u7f16\u7801\u51fd\u6570\u3002\u8fd9\u79cd\u4f4d\u7f6e\u7f16\u7801\uff08Positional Encoding, PE\uff09\u7684\u516c\u5f0f\u5982\u4e0b\u3002PE(pos,2i)=sin(pos\/100002i\/dmodel)PE(pos,2i+1)=cos(pos\/100002i\/dmodel)<\/p>\n\n\n\n<p>i\u4e0d\u540c\uff0c\u5219\u4e09\u89d2\u51fd\u6570\u7684\u5468\u671f\u4e0d\u540c\u3002\u540cpos\u4e0d\u540c\u5468\u671f\u7684\u4e09\u89d2\u51fd\u6570\u503c\u4e0d\u91cd\u590d\u3002\u8fd9\u6ee1\u8db3\u4e0a\u9762\u7684\u6027\u8d281\u3002\u53e6\u5916\uff0c\u6839\u636e\u4e09\u89d2\u51fd\u6570\u7684\u548c\u89d2\u516c\u5f0f\uff1asin(a+b)=sina\u22c5cosb+cosa\u22c5sinbcos(a+b)=cosa\u22c5cosb\u2212sina\u22c5sinb<\/p>\n\n\n\n<p>f(pos+k)&nbsp;\u662f&nbsp;f(pos)&nbsp;\u7684\u4e00\u4e2a\u7ebf\u6027\u51fd\u6570\uff0c\u5373\u4e0d\u540c\u7684pos\u4e4b\u95f4\u6709\u76f8\u5bf9\u5173\u7cfb\u3002\u8fd9\u6ee1\u8db3\u6027\u8d282\u3002<\/p>\n\n\n\n<p>\u672c\u6587\u4f5c\u8005\u4e5f\u5c1d\u8bd5\u4e86\u7528\u53ef\u5b66\u4e60\u7684\u51fd\u6570\u4f5c\u4e3a\u4f4d\u7f6e\u7f16\u7801\u51fd\u6570\u3002\u5b9e\u9a8c\u8868\u660e\uff0c\u4e8c\u8005\u7684\u8868\u73b0\u76f8\u5f53\u3002\u4f5c\u8005\u8fd8\u662f\u4f7f\u7528\u4e86\u4e09\u89d2\u51fd\u6570\u4f5c\u4e3a\u6700\u7ec8\u7684\u7f16\u7801\u51fd\u6570\uff0c\u8fd9\u662f\u56e0\u4e3a\u4e09\u89d2\u51fd\u6570\u80fd\u591f\u5916\u63a8\u5230\u4efb\u610f\u957f\u5ea6\u7684\u8f93\u5165\u5e8f\u5217\uff0c\u800c\u53ef\u5b66\u4e60\u7684\u4f4d\u7f6e\u7f16\u7801\u53ea\u80fd\u9002\u5e94\u8bad\u7ec3\u65f6\u7684\u5e8f\u5217\u957f\u5ea6\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"\u4e3a\u4ec0\u4e48\u7528\u81ea\u6ce8\u610f\u529b\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#%E4%B8%BA%E4%BB%80%E4%B9%88%E7%94%A8%E8%87%AA%E6%B3%A8%E6%84%8F%E5%8A%9B\"><\/a>\u4e3a\u4ec0\u4e48\u7528\u81ea\u6ce8\u610f\u529b<\/h2>\n\n\n\n<p>\u5728\u8bba\u6587\u7684\u7b2c\u56db\u7ae0\uff0c\u4f5c\u8005\u7528\u81ea\u6ce8\u610f\u529b\u5c42\u5bf9\u6bd4\u4e86\u5faa\u73af\u5c42\u548c\u5377\u79ef\u5c42\uff0c\u63a2\u8ba8\u4e86\u81ea\u6ce8\u610f\u529b\u7684\u4e00\u4e9b\u4f18\u70b9\u3002<\/p>\n\n\n\n<p>\u81ea\u6ce8\u610f\u529b\u5c42\u662f\u4e00\u79cd\u548c\u5faa\u73af\u5c42\u548c\u5377\u79ef\u5c42\u7b49\u6548\u7684\u8ba1\u7b97\u5355\u5143\u3002\u5b83\u4eec\u7684\u76ee\u7684\u90fd\u662f\u628a\u4e00\u4e2a\u5411\u91cf\u5e8f\u5217\u6620\u5c04\u6210\u53e6\u4e00\u4e2a\u5411\u91cf\u5e8f\u5217\uff0c\u6bd4\u5982\u8bf4\u7f16\u7801\u5668\u628ax\u6620\u5c04\u6210\u4e2d\u95f4\u8868\u793az\u3002\u8bba\u6587\u6bd4\u8f83\u4e86\u4e09\u4e2a\u6307\u6807\uff1a\u6bcf\u4e00\u5c42\u7684\u8ba1\u7b97\u590d\u6742\u5ea6\u3001\u4e32\u884c\u64cd\u4f5c\u7684\u590d\u6742\u5ea6\u3001\u6700\u5927\u8def\u5f84\u957f\u5ea6\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1059\" height=\"331\" src=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-11.jpeg\" alt=\"\" class=\"wp-image-267\" srcset=\"https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-11.jpeg 1059w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-11-300x94.jpeg 300w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-11-1024x320.jpeg 1024w, https:\/\/ai.oaido.com\/wp-content\/uploads\/2024\/09\/image-11-768x240.jpeg 768w\" sizes=\"auto, (max-width: 1059px) 100vw, 1059px\" 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class=\"wp-block-heading\" id=\"\u5b9e\u9a8c\u4e0e\u7ed3\u679c\"><a href=\"https:\/\/zhouyifan.net\/2022\/11\/12\/20220925-Transformer\/#%E5%AE%9E%E9%AA%8C%E4%B8%8E%E7%BB%93%E6%9E%9C\"><\/a>\u5b9e\u9a8c\u4e0e\u7ed3\u679c<\/h2>\n\n\n\n<p>\u672c\u5de5\u4f5c\u6d4b\u8bd5\u4e86\u201c\u82f1\u8bed-\u5fb7\u8bed\u201d\u548c\u201c\u82f1\u8bed-\u6cd5\u8bed\u201d\u4e24\u9879\u7ffb\u8bd1\u4efb\u52a1\u3002\u4f7f\u7528\u8bba\u6587\u7684\u9ed8\u8ba4\u6a21\u578b\u914d\u7f6e\uff0c\u57288\u5f20P100\u4e0a\u53ea\u970012\u5c0f\u65f6\u5c31\u80fd\u628a\u6a21\u578b\u8bad\u7ec3\u5b8c\u3002\u672c\u5de5\u4f5c\u4f7f\u7528\u4e86Adam\u4f18\u5316\u5668\uff0c\u5e76\u5bf9\u5b66\u4e60\u7387\u8c03\u5ea6\u6709\u4e00\u5b9a\u7684\u4f18\u5316\u3002\u6a21\u578b\u6709\u4e24\u79cd\u6b63\u5219\u5316\u65b9\u5f0f\uff1a1\uff09\u6bcf\u4e2a\u5b50\u5c42\u540e\u9762\u6709Dropout\uff0c\u4e22\u5f03\u6982\u73870.1\uff1b2\uff09\u6807\u7b7e\u5e73\u6ed1\uff08Label 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Al&#8230;<\/p>\n","protected":false},"author":1,"featured_media":254,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-253","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Attention Is All You Need (Transformer) \u8bba\u6587 - OAIDO AI<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ai.oaido.com\/index.php\/2024\/09\/19\/attention-is-all-you-need-transformer-\u8bba\u6587\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Attention Is All You Need (Transformer) \u8bba\u6587 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