{"id":44660,"date":"2023-12-11T15:03:32","date_gmt":"2023-12-11T07:03:32","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=44660"},"modified":"2023-12-11T15:03:32","modified_gmt":"2023-12-11T07:03:32","slug":"softmax%e5%85%ac%e5%bc%8f-2","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/softmax%e5%85%ac%e5%bc%8f-2\/","title":{"rendered":"softmax\u516c\u5f0f"},"content":{"rendered":"<p>&#8220;`&#8221;                    \u53c2\u8003\u56de\u7b54\uff1a<\/p>\n<p>\u8003\u8651\u4e00\u4e2a\u591a\u5206\u7c7b\u95ee\u9898\uff0c\u5373\u9884\u6d4b\u53d8\u91cfy\u53ef\u4ee5\u53d6k\u4e2a\u79bb\u6563\u503c\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a.\u6bd4\u5982\u4e00\u4e2a\u90ae\u4ef6\u5206\u7c7b\u7cfb\u7edf\u5c06\u90ae\u4ef6\u5206\u4e3a\u79c1\u4eba\u90ae\u4ef6\uff0c\u5de5\u4f5c\u90ae\u4ef6\u548c\u5783\u573e\u90ae\u4ef6\u3002\u7531\u4e8ey\u4ecd\u7136\u662f\u4e00\u4e2a\u79bb\u6563\u503c\uff0c\u53ea\u662f\u76f8\u5bf9\u4e8e\u4e8c\u5206\u7c7b\u7684\u903b\u8f91\u56de\u5f52\u591a\u4e86\u4e00\u4e9b\u7c7b\u522b\u3002\u4e0b\u9762\u5c06\u6839\u636e\u591a\u9879\u5f0f\u5206\u5e03\u5efa\u6a21\u3002<\/p>\n<p>\u8003\u8651\u5c06\u6837\u672c\u5171\u6709k\u7c7b\uff0c\u6bcf\u4e00\u7c7b\u7684\u6982\u7387\u5206\u522b\u4e3a&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780754032_55AD4EF88F7E3AD26F2CD92B856E3CE8&quot;&quot;&gt;,\u7531\u4e8e&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780734055_FECFD8E308BD37D59C0485500E9F903E&quot;&quot;&gt;\uff0c\u6240\u4ee5\u901a\u5e38\u6211\u4eec\u53ea\u9700\u8981k-1\u4e2a\u53c2\u6570&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780710620_E75398371BAA46411285BA02E9B31529&quot;&quot;&gt;\u5373\u53ef<\/p>\n<p>&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780686297_B9A323E4B63969BABB432C94241872AC&quot;&quot;&gt;\uff0c&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780670060_07223BB17E158C69D5CC16AB69EA1089&quot;&quot;&gt;<\/p>\n<p>\u4e3a\u4e86\u63a8\u5bfc\uff0c\u5f15\u5165\u8868\u8fbe\u5f0f\uff1a<\/p>\n<p>&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780653625_EF2B4EA5EADF1C9C886AD245EE3F3085&quot;&quot;&gt;<\/p>\n<p>\u4e0a\u9762T(y)\u662fk-1\u7ef4\u5217\u5411\u91cf,\u5176\u4e2dy = 1, 2, &#8230;k.<\/p>\n<p>T(y)i \u8868\u793a\u5411\u91cfT(y)\u7684\u7b2ci\u4e2a\u5143\u7d20\u3002<\/p>\n<p>\u8fd8\u8981\u5f15\u5165\u8868\u8fbe\u5f0f&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780638345_394803B5E9198D011F6406B3BE3E3951&quot;&quot;&gt;,\u5982\u679c\u5927\u62ec\u53f7\u91cc\u9762\u4e3a\u771f\uff0c\u5219\u771f\u4e2a\u8868\u8fbe\u5f0f\u5c31\u4e3a1\uff0c\u5426\u5219\u4e3a0.\u4f8b\u5982\uff1a1{2=3} = 0\u548c1{3=3} = 1.<\/p>\n<p>\u5219\u4e0a\u9762\u7684k\u4e2a\u5411\u91cf\u5c31\u53ef\u4ee5\u8868\u793a\u4e3a&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780618356_8A3CEDBA782BECC1F781F704839E1B1E&quot;&quot;&gt;<\/p>\n<p>\u4ee5\u4e3ay\u53ea\u80fd\u5c5e\u4e8e\u67d0\u4e00\u4e2a\u7c7b\u522b\uff0c\u4e8e\u662fT(y)\u4e2d\u53ea\u80fd\u6709\u4e00\u4e2a\u5143\u7d20\u4e3a1\u5176\u4ed6\u5143\u7d20\u90fd\u4e3a0\uff0c\u53ef\u4ee5\u6c42\u51fak-1\u4e2a\u5143\u7d20\u7684\u671f\u671b\uff1a&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780585157_9A2AFCAA427EE8D613BEAB8823AABE80&quot;&quot;&gt;<\/p>\n<p>\u5b9a\u4e49\uff1a&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780566695_6303D5194694BAB414C25ED0D950084A&quot;&quot;&gt;<\/p>\n<p>\u5176\u4e2di = 1,2,&#8230;k.\u5219\u6709\uff1a<\/p>\n<p>\u00a0<\/p>\n<p>\u4e5f&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780545108_75847EAFDFBEF2B1F7293B5EB9EA93F8&quot;&quot;&gt;<\/p>\n<p>\u5c31\u5bb9\u6613\u5f97\u51fa\uff1a&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780530817_BF7C4D4701A89F54B81141C7C39F59F7&quot;&quot;&gt;\uff0c\u7531\u8be5\u5f0f\u548c\u4e0a\u9762\u4f7f\u5f97\u7b49\u5f0f\uff1a&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780514381_9F97E100D5E05908A40E8643FA7028F2&quot;&quot;&gt;\u4e00\u8d77\u53ef\u4ee5\u5f97\u5230\uff1a&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780497399_E58AD253BCF4ED985E901176E56D8EB1&quot;&quot;&gt;\u8fd9\u4e2a\u51fd\u6570\u5c31\u662fsoftmax\u51fd\u6570\u3002<\/p>\n<p>\u7136\u540e\u5047\u8bbe&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780480942_A4C083330C29D979912BA2C60DF61410&quot;&quot;&gt;\u548c&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780459453_6BD4A2027B1D0DA5BFDBA09C07EDFB72&quot;&quot;&gt;\u5177\u6709\u7ebf\u6027\u5173\u7cfb\uff0c\u5373&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780442539_24D412E5E6994ECE25683D4A27FA9F64&quot;&quot;&gt;<\/p>\n<p>\u4e8e\u662f\u4ece\u6982\u7387\u7684\u89d2\u5ea6\u51fa\u53d1\uff1a<\/p>\n<p>&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780427162_84262429E420B08486929D2DA76549A0&quot;&quot;&gt;<\/p>\n<p>\u5176\u4e2d&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780407386_982395D6BA00A790D46FB3B006F9295C&quot;&quot;&gt;\u8fd9\u4e2a\u6a21\u578b\u5c31\u662fsoftmax\u56de\u5f52\uff08softmax regression\uff09, \u5b83\u662f\u903b\u8f91\u56de\u5f52\u7684\u6cdb\u5316\u3002<\/p>\n<p>\u8fd9\u6837\u6211\u4eec\u7684\u8f93\u51fa\uff1a<\/p>\n<p>&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780380844_93B3D62F538DCD81B879D415FF8AFB44&quot;&quot;&gt;<\/p>\n<p>\u5c31\u662f\u8f93\u51fa\u4e86x\u5c5e\u4e8e\uff081,2,&#8230;k-1\uff09\u4e2d\u6bcf\u4e00\u7c7b\u7684\u6982\u7387\uff0c\u5f53\u7136\u5c5e\u4e8e\u7b2ck\u7c7b\u7684\u6982\u7387\u5c31\u662f\uff1a&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780363300_31F8F724F33941669B4EDB4B912451FC&quot;&quot;&gt;<\/p>\n<p>\u4e0b\u9762\u5f00\u59cb\u62df\u5408\u53c2\u6570<\/p>\n<p>\u540c\u6837\u4f7f\u7528\u6700\u5927\u5316\u53c2\u6570\u03b8\u7684\u5bf9\u6570\u4f3c\u7136\u51fd\u6570\uff1a<\/p>\n<p>&lt;img alt=&quot;&quot;img&quot;&quot; referrerpolicy=&quot;&quot;no-referrer&quot;&quot; src=&quot;&quot;https:\/\/uploadfiles.nowcoder.com\/images\/20190317\/311436_1552780344713_55B9170B6E66F63328892E74B55F18CE&quot;&quot;&gt;<\/p>\n<p>\u8fd9\u91cc\u4f7f\u7528\u68af\u5ea6\u4e0b\u964d\u548c\u725b\u987f\u6cd5\u5747\u53ef\u3002<\/p>\n<p>\u00a0<\/p>\n<p>\u00a0<\/p>\n<p>&lt;pre&gt;&lt;code&gt;            &quot;&#8220;`<br \/>\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;`&#8221; \u53c2\u8003\u56de\u7b54\uff1a \u8003\u8651\u4e00\u4e2a\u591a\u5206\u7c7b\u95ee\u9898\uff0c\u5373\u9884\u6d4b\u53d8\u91cfy\u53ef\u4ee5\u53d6k\u4e2a\u79bb\u6563\u503c\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a.\u6bd4\u5982 [&hellip;]<\/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-44660","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44660","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=44660"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44660\/revisions"}],"predecessor-version":[{"id":44661,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/44660\/revisions\/44661"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=44660"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=44660"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=44660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}