“`” RNNs\u7684\u76ee\u7684\u4f7f\u7528\u6765\u5904\u7406\u5e8f\u5217\u6570\u636e\u3002\u5728\u4f20\u7edf\u7684\u795e\u7ecf\u7f51\u7edc\u6a21\u578b\u4e2d\uff0c\u662f\u4ece\u8f93\u5165\u5c42\u5230\u9690\u542b\u5c42\u518d\u5230\u8f93\u51fa\u5c42\uff0c\u5c42\u4e0e\u5c42\u4e4b\u95f4\u662f\u5168\u8fde\u63a5\u7684\uff0c\u6bcf\u5c42\u4e4b\u95f4\u7684\u8282\u70b9\u662f\u65e0\u8fde\u63a5\u7684\u3002\u4f46\u662f\u8fd9\u79cd\u666e\u901a\u7684\u795e\u7ecf\u7f51\u7edc\u5bf9\u4e8e\u5f88\u591a\u95ee\u9898\u5374\u65e0\u80fd\u65e0\u529b\u3002\u4f8b\u5982\uff0c\u4f60\u8981\u9884\u6d4b\u53e5\u5b50\u7684\u4e0b\u4e00\u4e2a\u5355\u8bcd\u662f\u4ec0\u4e48\uff0c\u4e00\u822c\u9700\u8981\u7528\u5230\u524d\u9762\u7684\u5355\u8bcd\uff0c\u56e0\u4e3a\u4e00\u4e2a\u53e5\u5b50\u4e2d\u524d\u540e\u5355\u8bcd\u5e76\u4e0d\u662f\u72ec\u7acb\u7684\u3002 RNNs\u4e4b\u6240\u4ee5\u79f0\u4e3a\u5faa\u73af\u795e\u7ecf\u7f51\u8def\uff0c\u5373\u4e00\u4e2a\u5e8f\u5217\u5f53\u524d\u7684\u8f93\u51fa\u4e0e\u524d\u9762\u7684\u8f93\u51fa\u4e5f\u6709\u5173\u3002\u5177\u4f53\u7684\u8868\u73b0\u5f62\u5f0f\u4e3a\u7f51\u7edc\u4f1a\u5bf9\u524d\u9762\u7684\u4fe1\u606f\u8fdb\u884c\u8bb0\u5fc6\u5e76\u5e94\u7528\u4e8e\u5f53\u524d\u8f93\u51fa\u7684\u8ba1\u7b97\u4e2d\uff0c\u5373\u9690\u85cf\u5c42\u4e4b\u95f4\u7684\u8282\u70b9\u4e0d\u518d\u65e0\u8fde\u63a5\u800c\u662f\u6709\u8fde\u63a5\u7684\uff0c\u5e76\u4e14\u9690\u85cf\u5c42\u7684\u8f93\u5165\u4e0d\u4ec5\u5305\u62ec\u8f93\u5165\u5c42\u7684\u8f93\u51fa\u8fd8\u5305\u62ec\u4e0a\u4e00\u65f6\u523b\u9690\u85cf\u5c42\u7684\u8f93\u51fa\u3002 \u7406\u8bba\u4e0a\uff0cRNNs\u80fd\u591f\u5bf9\u4efb\u4f55\u957f\u5ea6\u7684\u5e8f\u5217\u6570\u636e\u8fdb\u884c\u5904\u7406\u3002\u4f46\u662f\u5728\u5b9e\u8df5\u4e2d\uff0c\u4e3a\u4e86\u964d\u4f4e\u590d\u6742\u6027\u5f80\u5f80\u5047\u8bbe\u5f53\u524d\u7684\u72b6\u6001\u53ea\u4e0e\u524d\u9762\u7684\u51e0\u4e2a\u72b6\u6001\u76f8\u5173\uff0c\u4e0b\u56fe\u4fbf\u662f\u4e00\u4e2a\u5178\u578b\u7684RNNs\uff1a<\/p>\n
<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/julyedu-img-public.oss-cn-beijing.aliyuncs.com\/Public\/Image\/Question\/1515688523_186.jpg""><\/p>\n
RNNs\u5305\u542b\u8f93\u5165\u5355\u5143(Input units)\uff0c\u8f93\u5165\u96c6\u6807\u8bb0\u4e3a{x0,x1,…,xt,xt+1,…}\uff0c\u800c\u8f93\u51fa\u5355\u5143(Output units)\u7684\u8f93\u51fa\u96c6\u5219\u88ab\u6807\u8bb0\u4e3a{y0,y1,…,yt,yt+1.,..}\u3002RNNs\u8fd8\u5305\u542b\u9690\u85cf\u5355\u5143(Hidden units)\uff0c\u6211\u4eec\u5c06\u5176\u8f93\u51fa\u96c6\u6807\u8bb0\u4e3a{s0,s1,…,st,st+1,…}\uff0c\u8fd9\u4e9b\u9690\u85cf\u5355\u5143\u5b8c\u6210\u4e86\u6700\u4e3a\u4e3b\u8981\u7684\u5de5\u4f5c\u3002\u4f60\u4f1a\u53d1\u73b0\uff0c\u5728\u56fe\u4e2d\uff1a\u6709\u4e00\u6761\u5355\u5411\u6d41\u52a8\u7684\u4fe1\u606f\u6d41\u662f\u4ece\u8f93\u5165\u5355\u5143\u5230\u8fbe\u9690\u85cf\u5355\u5143\u7684\uff0c\u4e0e\u6b64\u540c\u65f6\u53e6\u4e00\u6761\u5355\u5411\u6d41\u52a8\u7684\u4fe1\u606f\u6d41\u4ece\u9690\u85cf\u5355\u5143\u5230\u8fbe\u8f93\u51fa\u5355\u5143\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0cRNNs\u4f1a\u6253\u7834\u540e\u8005\u7684\u9650\u5236\uff0c\u5f15\u5bfc\u4fe1\u606f\u4ece\u8f93\u51fa\u5355\u5143\u8fd4\u56de\u9690\u85cf\u5355\u5143\uff0c\u8fd9\u4e9b\u88ab\u79f0\u4e3a\u201cBack Projections\u201d\uff0c\u5e76\u4e14\u9690\u85cf\u5c42\u7684\u8f93\u5165\u8fd8\u5305\u62ec\u4e0a\u4e00\u9690\u85cf\u5c42\u7684\u72b6\u6001\uff0c\u5373\u9690\u85cf\u5c42\u5185\u7684\u8282\u70b9\u53ef\u4ee5\u81ea\u8fde\u4e5f\u53ef\u4ee5\u4e92\u8fde\u3002<\/p>\n
<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/julyedu-img-public.oss-cn-beijing.aliyuncs.com\/Public\/Image\/Question\/1515688554_151.png""><\/p>\n
\u4e0a\u56fe\u5c06\u5faa\u73af\u795e\u7ecf\u7f51\u7edc\u8fdb\u884c\u5c55\u5f00\u6210\u4e00\u4e2a\u5168\u795e\u7ecf\u7f51\u7edc\u3002\u4f8b\u5982\uff0c\u5bf9\u4e00\u4e2a\u5305\u542b5\u4e2a\u5355\u8bcd\u7684\u8bed\u53e5\uff0c\u90a3\u4e48\u5c55\u5f00\u7684\u7f51\u7edc\u4fbf\u662f\u4e00\u4e2a\u4e94\u5c42\u7684\u795e\u7ecf\u7f51\u7edc\uff0c\u6bcf\u4e00\u5c42\u4ee3\u8868\u4e00\u4e2a\u5355\u8bcd\u3002\u5bf9\u4e8e\u8be5\u7f51\u7edc\u7684\u8ba1\u7b97\u8fc7\u7a0b\u5982\u4e0b\uff1a 1. xt\u8868\u793a\u7b2ct,t=1,2,3…\u6b65(step)\u7684\u8f93\u5165\u3002\u6bd4\u5982\uff0cx1\u4e3a\u7b2c\u4e8c\u4e2a\u8bcd\u7684one-hot\u5411\u91cf(\u6839\u636e\u4e0a\u56fe\uff0cx0\u4e3a\u7b2c\u4e00\u4e2a\u8bcd)\uff1b 2. st\u4e3a\u9690\u85cf\u5c42\u7684\u7b2ct\u6b65\u7684\u72b6\u6001\uff0c\u5b83\u662f\u7f51\u7edc\u7684\u8bb0\u5fc6\u5355\u5143\u3002 st\u6839\u636e\u5f53\u524d\u8f93\u5165\u5c42\u7684\u8f93\u51fa\u4e0e\u4e0a\u4e00\u6b65\u9690\u85cf\u5c42\u7684\u72b6\u6001\u8fdb\u884c\u8ba1\u7b97\u3002st=f(Uxt+Wst\u22121)\uff0c\u5176\u4e2df\u4e00\u822c\u662f\u975e\u7ebf\u6027\u7684\u6fc0\u6d3b\u51fd\u6570\uff0c\u5982tanh\u6216ReLU\uff0c\u5728\u8ba1\u7b97s0\u65f6\uff0c\u5373\u7b2c\u4e00\u4e2a\u5355\u8bcd\u7684\u9690\u85cf\u5c42\u72b6\u6001\uff0c\u9700\u8981\u7528\u5230s\u22121\uff0c\u4f46\u662f\u5176\u5e76\u4e0d\u5b58\u5728\uff0c\u5728\u5b9e\u73b0\u4e2d\u4e00\u822c\u7f6e\u4e3a0\u5411\u91cf\uff1b 3. ot\u662f\u7b2ct\u6b65\u7684\u8f93\u51fa\uff0c\u5982\u4e0b\u4e2a\u5355\u8bcd\u7684\u5411\u91cf\u8868\u793a\uff0cot=softmax(Vst).<\/p>\n
<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
“`” RNNs\u7684\u76ee\u7684\u4f7f\u7528\u6765\u5904\u7406\u5e8f\u5217\u6570\u636e\u3002\u5728\u4f20\u7edf\u7684\u795e\u7ecf\u7f51\u7edc\u6a21\u578b\u4e2d\uff0c\u662f\u4ece\u8f93\u5165\u5c42\u5230\u9690\u542b\u5c42\u518d […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-44067","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44067","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=44067"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44067\/revisions"}],"predecessor-version":[{"id":44068,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44067\/revisions\/44068"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=44067"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=44067"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=44067"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}