{"id":384,"date":"2026-03-25T10:34:00","date_gmt":"2026-03-25T02:34:00","guid":{"rendered":"https:\/\/mitongxue.cn\/?p=384"},"modified":"2026-06-14T10:37:39","modified_gmt":"2026-06-14T02:37:39","slug":"transformer-%e8%a7%a3%e7%a0%81%e7%ad%96%e7%95%a5","status":"publish","type":"post","link":"https:\/\/mitongxue.cn\/index.php\/2026\/03\/25\/transformer-%e8%a7%a3%e7%a0%81%e7%ad%96%e7%95%a5\/","title":{"rendered":"Transformer \u89e3\u7801\u7b56\u7565"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u6839\u636e\u6982\u7387\u9009\u62e9\u8bcd\u5143\u7684\u65b9\u6cd5\u88ab\u79f0\u4e4b\u4e3a<strong>\u89e3\u7801\u7b56\u7565\uff08decoding strategy\uff09<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5e38\u89c1\u7684\u7b56\u7565\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8d2a\u5a6a\u7b56\u7565\uff08Greedy\uff09\uff1a\u9009\u6700\u5927\u503c<\/li>\n\n\n\n<li>\u91c7\u6837\u7b56\u7565\uff08Top-k, Top-p\uff09\uff1a\u5f15\u5165\u968f\u673a\u6027\uff0c\u589e\u52a0\u591a\u6837\u6027<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u8d2a\u5a6a\u7b56\u7565<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bcf\u4e00\u6b65\u90fd\u9009\u62e9\u5f53\u524d <strong>\u6982\u7387\u6700\u5927<\/strong> \u7684\u8bcd\u5143\u4f5c\u4e3a\u4e0b\u4e00\u4e2a\u8f93\u51fa\uff0c\u4e0d\u8003\u8651\u540e\u7eed\u6f5c\u5728\u53ef\u80fd\u6027\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\u5f53\u524d\u4e0a\u4e0b\u6587\u662f\uff1a\u201c\u6211\u4eca\u5929\u5f88\u201d\uff0c\u6a21\u578b\u8f93\u51fa\u7684 softmax \u6982\u7387\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{<br>  \u5f00\u5fc3: 0.61,<br>  \u7d2f: 0.12,<br>  \u5fd9: 0.08,<br>  \u7f8e\u4e3d: 0.04,<br>  ...\uff08\u5171 50000 \u4e2a\u8bcd\uff09<br>}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f7f\u7528\u8d2a\u5a6a\u7b56\u7565\u89e3\u7801\uff0c\u4e0b\u4e00\u8bcd = \u9009\u62e9\u6982\u7387\u6700\u5927\u7684\u8bcd = \u201c\u5f00\u5fc3\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4f18\u70b9\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7b80\u5355\u6613\u5b9e\u73b0<\/li>\n\n\n\n<li>\u901f\u5ea6\u5feb<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7f3a\u70b9\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7f3a\u4e4f\u591a\u6837\u6027\uff1a\u540c\u6837\u7684\u8f93\u5165\u6bcf\u6b21\u90fd\u4f1a\u5f97\u5230\u540c\u6837\u7684\u8f93\u51fa<\/li>\n\n\n\n<li>\u5bb9\u6613\u9677\u5165\u5c40\u90e8\u6700\u4f18<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u91c7\u6837\u7b56\u7565<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u91c7\u6837\u7b56\u7565\u662f\u5728\u6bcf\u4e00\u6b65\u751f\u6210\u65f6\uff0c<strong>\u4e0d\u603b\u662f\u9009\u6982\u7387\u6700\u5927\u7684\u8bcd<\/strong>\uff0c\u800c\u662f<strong>\u6839\u636e softmax \u6982\u7387\u5206\u5e03\u8fdb\u884c\u968f\u673a\u62bd\u6837<\/strong>\uff0c\u8fd9\u6837\u6bcf\u6b21\u751f\u6210\u53ef\u80fd\u90fd\u4e0d\u4e00\u6837\uff0c\u589e\u5f3a\u8bed\u8a00\u591a\u6837\u6027\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\u4e0a\u9762\u7684 softmax \u8f93\u51fa\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{<br>  \u5f00\u5fc3: 0.61,<br>  \u7d2f: 0.12,<br>  \u5fd9: 0.08,<br>  \u7f8e\u4e3d: 0.04,<br>  ...\uff08\u5171 50000 \u4e2a\u8bcd\uff09<br>}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u90a3\u4e48\u4f1a\u6839\u636e\u6982\u7387<strong>\u968f\u673a\u62bd\u4e00\u4e2a<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53ef\u80fd\u662f\u201c\u5f00\u5fc3\u201d\uff0861%\uff09<\/li>\n\n\n\n<li>\u4e5f\u53ef\u80fd\u662f\u201c\u7d2f\u201d\uff0812%\uff09<\/li>\n\n\n\n<li>\u6709\u5c0f\u6982\u7387\u662f\u201c\u7f8e\u4e3d\u201d\uff084%\uff09<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u91c7\u6837\u7b56\u7565\u7684\u6838\u5fc3\u601d\u60f3\u662f\uff1a\u4e0d\u662f\u603b\u9009\u6700\u6709\u53ef\u80fd\u7684\u90a3\u4e2a\u8bcd\uff0c\u800c\u662f\u8ba9 <strong>\u201c\u53ef\u80fd\u6027\u9ad8\u7684\u8bcd\u66f4\u6709\u53ef\u80fd\u88ab\u9009\u4e2d\u201d<\/strong>\uff0c\u4f46\u4e0d\u662f\u552f\u4e00\u7ed3\u679c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4f18\u70b9\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u591a\u6837\u6027\u9ad8\uff1a\u540c\u6837\u7684\u8f93\u5165\uff0c\u53ef\u4ee5\u751f\u6210\u591a\u79cd\u4e0d\u540c\u7684\u5408\u7406\u8f93\u51fa<\/li>\n\n\n\n<li>\u66f4\u81ea\u7136<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7f3a\u70b9\uff1a<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4e0d\u53ef\u63a7<\/li>\n\n\n\n<li>\u6709\u65f6\u4f1a\u80e1\u8bf4\u516b\u9053<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u6e29\u5ea6\u7cfb\u6570\uff08Temperature\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u91c7\u6837\u7b56\u7565\u4e2d\uff0c\u53ef\u4ee5\u5f15\u5165\u4e00\u4e2a<strong>\u6e29\u5ea6\u7cfb\u6570\uff08temperature\uff09<\/strong> \u6765\u63a7\u5236 softmax \u6982\u7387\u5206\u5e03\u7684\u201c\u9661\u5ced\u7a0b\u5ea6\u201d\uff0c\u5f71\u54cd\u6a21\u578b\u7684\u201c\u968f\u673a\u6027\u201d\u4e0e\u201c\u786e\u5b9a\u6027\u201d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u539f\u7406<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9ed8\u8ba4 softmax \u7684\u8ba1\u7b97\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>probs = softmax(logits) \/\/ \u5c06\u5206\u6570\u8f6c\u4e3a\u6982\u7387<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u52a0\u5165\u6e29\u5ea6 T \u540e\uff0c\u53d8\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>probs = softmax(logits \/ T)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T \u662f\u4e00\u4e2a\u6b63\u6570\uff08\u4e00\u822c\u53d6\u503c 0.5 ~ 2\uff09<\/li>\n\n\n\n<li>logits \u9664\u4ee5 T \u540e\uff0c\u6574\u4e2a\u5206\u5e03\u4f1a\u53d8\u5316<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6e29\u5ea6\u7684\u5f71\u54cd<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u6e29\u5ea6 T<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u5206\u5e03\u7279\u5f81<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u89e3\u7801\u8868\u73b0<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">T &lt; 1<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u66f4\u5c16\u9510<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u66f4\u504f\u5411\u9ad8\u6982\u7387\u8bcd<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">T = 1<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u539f\u59cb\u5206\u5e03<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u6807\u51c6\u91c7\u6837<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">T &gt; 1<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u66f4\u5e73\u5766<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u66f4\u503e\u5411\u968f\u673a\u3001\u591a\u6837\u5316<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u793a\u4f8b\u8bf4\u660e<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ecd\u4ee5\u4e0a\u9762\u7684 logits \u4e3a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{<br>  \u5f00\u5fc3: 4.2,<br>  \u7d2f: 2.7,<br>  \u5fd9: 1.5,<br>  \u6628\u5929: -1.2,<br>  \u5c0f\u72d7: -3.5<br>}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u540c\u6e29\u5ea6\u4e0b\u7684\u884c\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T = 1\uff1a\u5f00\u5fc3\uff0861%\uff09\u4ecd\u6700\u53ef\u80fd\uff0c\u4f46\u5176\u4ed6\u8bcd\u6709\u8f83\u4f4e\u6982\u7387<\/li>\n\n\n\n<li>T = 0.5\uff1a\u5f00\u5fc3\u66f4\u5177\u538b\u5012\u6027\u4f18\u52bf\uff08\u4f8b\u5982 >80%\uff09<\/li>\n\n\n\n<li>T = 2.0\uff1a\u5176\u4ed6\u8bcd\u6982\u7387\u663e\u8457\u63d0\u5347\uff0c\u5206\u5e03\u53d8\u201c\u5e73\u201d<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6e29\u5ea6\u8d8a\u4f4e\uff0c\u8d8a\u503e\u5411\u4e8e\u9009\u62e9\u9ad8\u6982\u7387\u7684\u8bcd\uff0c\u6e29\u5ea6\u8d8a\u9ad8\uff0c\u8d8a\u503e\u5411\u4e8e\u9009\u62e9\u5176\u4ed6\u8bcd<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6700\u4f73\u5b9e\u8df5<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u60f3\u751f\u6210\u201c\u7a33\u5b9a\u201d\u201c\u4e00\u81f4\u6027\u5f3a\u201d\u7684\u7ed3\u679c \u2192 \u4f7f\u7528\u4f4e\u6e29\u5ea6\uff08\u5982 T = 0.7\uff09<\/li>\n\n\n\n<li>\u60f3\u751f\u6210\u201c\u6709\u521b\u610f\u201d\u201c\u66f4\u591a\u6837\u201d\u7684\u7ed3\u679c \u2192 \u4f7f\u7528\u9ad8\u6e29\u5ea6\uff08\u5982 T = 1.5\uff09<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u603b\u7ed3\u4e00\u53e5\u8bdd\uff1a\u6e29\u5ea6\u7cfb\u6570\u662f\u63a7\u5236\u751f\u6210\u6587\u672c\u201c\u4fdd\u5b88\u201d\u8fd8\u662f\u201c\u653e\u98de\u201d\u7684\u65cb\u94ae\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u5176\u4ed6\u89e3\u7801\u7b56\u7565<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u9664\u4e86\u8d2a\u5a6a\u7b56\u7565\u548c\u91c7\u6837\u7b56\u7565\uff0c\u8fd8\u6709\u4e00\u4e9b\u5e38\u7528\u7684\u9ad8\u7ea7\u89e3\u7801\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u7b56\u7565<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u6bcf\u4e00\u6b65\u505a\u4ec0\u4e48<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u6548\u679c<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u8d2a\u5a6a\u89e3\u7801<\/strong><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u9009\u6982\u7387\u6700\u5927<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5355\u4e00\u3001\u91cd\u590d\u3001\u7a33\u5b9a<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u91c7\u6837\uff08\u968f\u673a\uff09<\/strong><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u6839\u636e\u6982\u7387\u968f\u673a\u9009\u4e00\u4e2a\u8bcd<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u591a\u6837\u3001\u6709\u8da3\u4f46\u4e0d\u7a33\u5b9a<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>Top-k<\/strong><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u53ea\u5728\u6982\u7387\u524d k \u540d\u4e2d\u968f\u673a\u9009<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u63a7\u5236\u968f\u673a\u6027 + \u4fdd\u7559\u5408\u7406\u9009\u9879<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>Top-p\uff08nucleus\uff09<\/strong><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5728\u7d2f\u8ba1\u6982\u7387 &gt; p \u7684\u8bcd\u4e2d\u968f\u673a\u9009<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u66f4\u667a\u80fd\u7684\u91c7\u6837\u7b56\u7565<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>Beam Search<\/strong><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u4fdd\u7559\u591a\u4e2a\u5019\u9009\u53e5\u5206\u652f\u5e76\u8bc4\u5206<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u66f4\u63a5\u8fd1\u5168\u5c40\u6700\u4f18\u4f46\u8ba1\u7b97\u66f4\u8d35<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6839\u636e\u6982\u7387\u9009\u62e9\u8bcd\u5143\u7684\u65b9\u6cd5\u88ab\u79f0\u4e4b\u4e3a\u89e3\u7801\u7b56\u7565\uff08decod..<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[32],"class_list":["post-384","post","type-post","status-publish","format-standard","hentry","category-ai","tag-transformer"],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":""},"author_info":{"info":["\u9648 \u67d0\u4eba"]},"category_info":"<a href=\"https:\/\/mitongxue.cn\/index.php\/category\/ai\/\" rel=\"category tag\">AI<\/a>","tag_info":"AI","comment_count":"0","_links":{"self":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/384","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/comments?post=384"}],"version-history":[{"count":2,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/384\/revisions"}],"predecessor-version":[{"id":386,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/384\/revisions\/386"}],"wp:attachment":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/media?parent=384"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/categories?post=384"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/tags?post=384"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}