{"id":11274,"date":"2020-11-08T12:24:44","date_gmt":"2020-11-08T12:24:44","guid":{"rendered":"https:\/\/club.informatix.co.jp\/?p=11274"},"modified":"2024-04-30T09:33:59","modified_gmt":"2024-04-30T09:33:59","slug":"%e3%83%8b%e3%83%a5%e3%83%bc%e3%83%a9%e3%83%ab%e3%83%8d%e3%83%83%e3%83%88%e3%83%af%e3%83%bc%e3%82%af%e3%81%ae%e3%83%91%e3%83%a9%e3%83%a1%e3%83%bc%e3%82%bf%e5%88%9d%e6%9c%9f%e5%8c%96%e3%82%92%e7%b4%b9","status":"publish","type":"post","link":"https:\/\/club.informatix.co.jp\/?p=11274","title":{"rendered":"\u30cb\u30e5\u30fc\u30e9\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u521d\u671f\u5316\u624b\u6cd5\u3092\u7d39\u4ecb"},"content":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001<a href=\"https:\/\/www.informatix.co.jp\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u30a4\u30f3\u30d5\u30a9\u30de\u30c6\u30a3\u30af\u30b9<\/a>\u3067\u6a5f\u68b0\u5b66\u7fd2\u696d\u52d9\u3092\u62c5\u5f53\u3057\u3066\u3044\u308b\u5927\u6a4b\u3067\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f\u521d\u5fc3\u306b\u8fd4\u3063\u3066\u3001\u6df1\u5c64\u5b66\u7fd2\u3067\u7528\u3044\u3089\u308c\u308b\u6d3b\u6027\u5316\u95a2\u6570\u306e\u6027\u8cea\u3084\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u521d\u671f\u5316\u3092\u30c6\u30fc\u30de\u306b\u53d6\u308a\u4e0a\u3052\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69e89e6fdb0de\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69e89e6fdb0de\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/club.informatix.co.jp\/?p=11274\/#%E3%81%AF%E3%81%98%E3%82%81%E3%81%AB\" >\u306f\u3058\u3081\u306b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/club.informatix.co.jp\/?p=11274\/#Xavier%E3%81%AE%E5%88%9D%E6%9C%9F%E5%8C%96\" >Xavier\u306e\u521d\u671f\u5316<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/club.informatix.co.jp\/?p=11274\/#%E6%B4%BB%E6%80%A7%E5%8C%96%E9%96%A2%E6%95%B0%E3%81%AE%E9%81%95%E3%81%84\" >\u6d3b\u6027\u5316\u95a2\u6570\u306e\u9055\u3044<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/club.informatix.co.jp\/?p=11274\/#%E5%88%9D%E6%9C%9F%E5%8C%96%E3%81%AE%E6%94%B9%E5%96%84\" >\u521d\u671f\u5316\u306e\u6539\u5584<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/club.informatix.co.jp\/?p=11274\/#%E5%88%9D%E6%9C%9F%E5%8C%96%E3%81%AE%E9%81%95%E3%81%84%E3%81%AB%E3%82%88%E3%82%8B%E7%B2%BE%E5%BA%A6%E3%81%AE%E6%94%B9%E5%96%84\" >\u521d\u671f\u5316\u306e\u9055\u3044\u306b\u3088\u308b\u7cbe\u5ea6\u306e\u6539\u5584<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/club.informatix.co.jp\/?p=11274\/#He%E3%81%AE%E5%88%9D%E6%9C%9F%E5%8C%96\" >He\u306e\u521d\u671f\u5316<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/club.informatix.co.jp\/?p=11274\/#%E5%88%9D%E6%9C%9F%E5%8C%96%E3%81%AE%E6%8B%A1%E5%BC%B5\" >\u521d\u671f\u5316\u306e\u62e1\u5f35<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/club.informatix.co.jp\/?p=11274\/#%E5%88%9D%E6%9C%9F%E5%8C%96%E3%81%AE%E9%81%95%E3%81%84%E3%81%AB%E3%82%88%E3%82%8B%E7%B2%BE%E5%BA%A6%E5%B7%AE\" >\u521d\u671f\u5316\u306e\u9055\u3044\u306b\u3088\u308b\u7cbe\u5ea6\u5dee<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/club.informatix.co.jp\/?p=11274\/#%E3%81%BE%E3%81%A8%E3%82%81\" >\u307e\u3068\u3081<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/club.informatix.co.jp\/?p=11274\/#%E5%8F%82%E8%80%83%E6%96%87%E7%8C%AE\" >\u53c2\u8003\u6587\u732e<\/a><\/li><\/ul><\/nav><\/div>\n\n<h2><span class=\"ez-toc-section\" id=\"%E3%81%AF%E3%81%98%E3%82%81%E3%81%AB\"><\/span>\u306f\u3058\u3081\u306b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u6d3b\u6027\u5316\u95a2\u6570\u3084\u521d\u671f\u5024\u304c\u60aa\u3044\u3068\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u5c40\u6240\u89e3\u306b\u306f\u307e\u308a\u3084\u3059\u304f\u306a\u308a\u5b66\u7fd2\u306e\u53ce\u675f\u306e\u60aa\u3055\u3084\u4e88\u6e2c\u7cbe\u5ea6\u306e\u4f4e\u4e0b\u3092\u62db\u304d\u307e\u3059\u3002<\/p>\n<p>\u672c\u8a18\u4e8b\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30c0\u30a4\u30ca\u30df\u30af\u30b9\u3092\u89e3\u6790\u3057\u305d\u308c\u3089\u306e\u5f31\u70b9\u306e\u6539\u5584\u624b\u6cd5\u3092\u63d0\u6848\u3057\u305f\u8ad6\u6587 [1][2]\u306b\u3064\u3044\u3066\u306e\u89e3\u8aac\u3067\u3059\u3002<\/p>\n<p>\u73fe\u5728\u3067\u306f\u3001Xavier\u306e\u521d\u671f\u5316\u3001He\u306e\u521d\u671f\u5316\u3068\u3057\u3066\u77e5\u3089\u308c\u3066\u3044\u308b\u3082\u306e\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u6d3b\u6027\u5316\u95a2\u6570\u306b\u95a2\u3057\u3066\u306f\u73fe\u5728\u306f\u3042\u307e\u308a\u7528\u3044\u3089\u308c\u306a\u304f\u306a\u3063\u305f\u3082\u306e\u3082\u542b\u307e\u308c\u307e\u3059\u304c\u3001\u306a\u305c\u7528\u3044\u3089\u308c\u306a\u304f\u306a\u3063\u305f\u306e\u304b\u3092\u77e5\u3063\u3066\u304a\u304f\u306e\u3082\u6709\u76ca\u3060\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Xavier%E3%81%AE%E5%88%9D%E6%9C%9F%E5%8C%96\"><\/span>Xavier\u306e\u521d\u671f\u5316<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>[1]\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8ad6\u6587\u306f2010\u5e74\u5f53\u6642\u3001\u5c64\u3092\u6df1\u304f\u3059\u308b\u3068\u521d\u671f\u5316\u65b9\u6cd5\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u69cb\u9020\u306b\u3088\u3063\u3066\u5b66\u7fd2\u304c\u5931\u6557\u3057\u3066\u3044\u305f\u306e\u3092\u53d7\u3051\u3066\u3001\u305d\u306e\u539f\u56e0\u3092\u8a73\u7d30\u306b\u8abf\u3079\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u5bfe\u8c61\u306b\u3057\u305f\u30bf\u30b9\u30af\u306fMNIST, CIFAR-10, ImageNet\u7b49\u306e\u30c7\u30fc\u30bf\u3092\u7528\u3044\u305f\u753b\u50cf\u8b58\u5225\u3067\u3059\u3002<\/p>\n<p>\u89e3\u6790\u306b\u7528\u3044\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306f\u7dda\u5f62\u5909\u63db+\u6d3b\u6027\u5316\u95a2\u6570\u306e\u5c64\u3092\u7a4d\u307f\u91cd\u306d\u305f\u51fa\u529b\u5c64\u304cSoftmax\u306e\u7c21\u5358\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u307f\u3092\u8003\u3048\u307e\u3059\u3002<\/p>\n<p>\u3064\u307e\u308a\u3001\\(i\\)\u5c64\u3067\u306e\u5165\u529b\u3092\\(z^{(i)}_{k}\\)\u3001\u7dda\u5f62\u5909\u63db\u306e\u884c\u5217\u3068\u30d0\u30a4\u30a2\u30b9\u3092\u305d\u308c\u305e\u308c\\(\uff57^{(i)}_{kl}, b^{(i)}_{k}\\)\u3001\u6d3b\u6027\u5316\u95a2\u6570\u3092\\(f\\)\u3068\u3057\u305f\u3068\u304d\u306b\u4ee5\u4e0b\u306e\u5909\u63db\u3092\u884c\u3046\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u3059\u3002<\/p>\n<p>\u51fa\u529b\u5c64\u306e\u307f\\(f\\)\u306fSoftmax\u95a2\u6570\u3067\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\(s^{(i)}_{k}=\\sum_{l}w^{(i)}_{kl}z^{(i)}_{l}+b^{(i)}_{k}\\)<\/p>\n<p style=\"text-align: center;\">\\(z^{(i+1)}_{k}=\\left[ f(s^{(i)})\\right]_{k}\\)<\/p>\n<p>\u3053\u306e\u3088\u3046\u306a\u7c21\u5358\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u3082\u3001\u521d\u671f\u5316\u65b9\u6cd5\u3084\u6d3b\u6027\u5316\u95a2\u6570\u306e\u9078\u629e\u3092\u9593\u9055\u3048\u308b\u3068\u5b66\u7fd2\u304c\u3046\u307e\u304f\u3044\u304b\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u5b9f\u9a13\u3067\u306f4\u5c64\u306a\u3044\u3057\u306f5\u5c64\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u73fe\u5728\u304b\u3089\u8003\u3048\u308b\u3068\u975e\u5e38\u306b\u6d45\u3044\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u3059\u3002\u7d0410\u5e74\u524d\u3067\u3059\u304c\u6642\u4ee3\u3092\u611f\u3058\u307e\u3059\u3002<\/p>\n<p>[1]\u3067\u306f\u6d3b\u6027\u5316\u95a2\u6570\u306e\u5f71\u97ff\u3082\u8003\u5bdf\u3057\u3066\u3044\u307e\u3059\u3002\u4e3b\u984c\u304b\u3089\u5916\u308c\u308b\u306e\u3067\u8208\u5473\u306e\u3042\u308b\u65b9\u306e\u307f\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E6%B4%BB%E6%80%A7%E5%8C%96%E9%96%A2%E6%95%B0%E3%81%AE%E9%81%95%E3%81%84\"><\/span>\u6d3b\u6027\u5316\u95a2\u6570\u306e\u9055\u3044<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5148\u305a\u6d3b\u6027\u5316\u95a2\u6570\u306e\u9055\u3044\u306b\u3088\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30c0\u30a4\u30ca\u30df\u30af\u30b9\u306e\u9055\u3044\u3092\u898b\u3066\u307f\u307e\u3059\u3002\u6d3b\u6027\u5316\u95a2\u6570\u3068\u3057\u3066Sigmoid\u3001Hyperbolic Tangent\u3001Softsign\u306e3\u3064\u3092\u8003\u3048\u307e\u3059\u3002<\/p>\n<p>\u3069\u308c\u3082ReLU\u306e\u767b\u5834\u306b\u3088\u3063\u3066\u6700\u8fd1\u3067\u306f\u983b\u7e41\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u5370\u8c61\u306f\u53d7\u3051\u307e\u305b\u3093\u306d\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u7d39\u4ecb\u3059\u308b\u521d\u671f\u5316\u65b9\u6cd5\u3068\u6bd4\u8f03\u7528\u306b\u3001&#8221;\u901a\u5e38\u306e&#8221;\u521d\u671f\u5316\u65b9\u6cd5\u3068\u3057\u3066\\(b^{(i)}\\)\u3092\u30bc\u30ed\u3068\u3057\u3001\\(w^{(i)}\\)\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u4e00\u69d8\u5206\u5e03\u3067\u30e9\u30f3\u30c0\u30e0\u306b\u8a2d\u5b9a\u3059\u308b\u3082\u306e\u3092\u63a1\u7528\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\\(n\\)\u306f\u524d\u5c64\u306e\u30b5\u30a4\u30ba\u3067\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\(w^{(i)} \\sim U\\left[ -\\frac{1}{\\sqrt{n}},\\frac{1}{\\sqrt{n}}\\right]\\)<\/p>\n<p>\u624b\u59cb\u3081\u306b<strong>&#8220;\u901a\u5e38\u306e&#8221;\u521d\u671f\u5316\u65b9\u6cd5\u30fb\u6d3b\u6027\u5316\u95a2\u6570\u304cSigmoid<\/strong>\u306e\u5834\u5408\u306e\u5b66\u7fd2\u904e\u7a0b\u3092\u898b\u3066\u307f\u307e\u3059\u3002<\/p>\n<p>\u5b66\u7fd2\u306e\u904e\u7a0b\u3067\u5404\u30a8\u30dd\u30c3\u30af\u3054\u3068\u306e\u5404\u5c64\u306e\u51fa\u529b\u306e\u5e73\u5747\u3068\u5206\u6563\u3092\u53d6\u3063\u305f\u3082\u306e\u304c\u4ee5\u4e0b\u306e\u56f31\u3067\u3059\u3002\u7e26\u7dda\u304c\u5206\u6563\u306e\u5e45\u3092\u8868\u3057\u307e\u3059\u3002\u5b66\u7fd2\u306f4\u5c64\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u884c\u308f\u308c\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2149 aligncenter\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2020-p\/10\/glorot1.png\" alt=\"\" width=\"707\" height=\"248\" \/><\/p>\n<p style=\"text-align: center;\">\u56f31\uff1a\u53c2\u8003\u6587\u732e[1]\u3088\u308a\u629c\u7c8b<\/p>\n<p>\u6700\u7d42\u96a0\u308c\u5c64\u306e\u51fa\u529b\u304c\u3001\u5b66\u7fd2\u521d\u671f\u6bb5\u968e\u3067\u6025\u6fc0\u306b0\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u5165\u529b\u306b\u8fd1\u3044\u5074\u306e\u5c64\u306f\u521d\u671f100\u30a8\u30dd\u30c3\u30af\u304f\u3089\u3044\u307e\u3067\u306f\u307b\u3068\u3093\u3069\u5909\u5316\u304c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3064\u307e\u308a\u3001\u8aa4\u5dee\u306e\u9006\u4f1d\u64ad\u306b\u3088\u308b\u52fe\u914d\u306e\u60c5\u5831\u304c\u3046\u307e\u304f\u4f1d\u308f\u3063\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002100\u30a8\u30dd\u30c3\u30af\u3092\u904e\u304e\u305f\u8fba\u308a\u304b\u3089\u3001\u3053\u306e\u81a0\u7740\u72b6\u614b\u304b\u3089\u629c\u3051\u51fa\u3057\u3066\u5b66\u7fd2\u304c\u9032\u307f\u59cb\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u73fe\u8c61\u304c\u8d77\u304d\u308b\u539f\u56e0\u3068\u3057\u3066[1]\u3067\u306f\u3001\u300c\u521d\u671f\u5316\u306e\u65b9\u6cd5\u304c\u60aa\u3044\u3068\u5165\u529b\u5c64\u306b\u8fd1\u3044\u5074\u3067\u53d6\u308a\u51fa\u3055\u308c\u308b\u60c5\u5831\u306b\u610f\u5473\u304c\u306a\u304f\u3001\u3053\u308c\u3089\u306e\u60c5\u5831\u3088\u308a\u3082\u30d1\u30e9\u30e1\u30fc\u30bf\u6570\u3082\u5c11\u306a\u304f\u8abf\u6574\u3057\u3084\u3059\u3044\u51fa\u529b\u5c64\u306e\u30d0\u30a4\u30a2\u30b9\u9805\u3092\u6700\u9069\u5316\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u7cbe\u5ea6\u3092\u51fa\u305d\u3046\u3068\u3059\u308b\u304b\u3089\u300d\u3068\u63a8\u6e2c\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3064\u307e\u308a\u3001\u5b66\u7fd2\u306e\u521d\u671f\u306f\u5404\u5c64\u306e\u51fa\u529b\u306b\u610f\u5473\u304c\u306a\u304f\u51fa\u529b\u5c64\u306e\u51fa\u529b\\(Softmax(wz+b)\\)\u306b\u304a\u3044\u3066\\(wz\\)\u306e\u4f9d\u5b58\u5ea6\u3092\u4e0b\u3052\u3001b\u306e\u307f\u306b\u3088\u308b\u6700\u9069\u5316\u3092\u3057\u3088\u3046\u3068\u3059\u308b\u63a8\u6e2c\u3067\u3059\u3002\u305d\u306e\u7d50\u679c\u3068\u3057\u3066\u3001\u6700\u7d42\u96a0\u308c\u5c64\u306e\u51fa\u529b\\(z\\)\u30920\u306b\u8fd1\u3065\u3051\u3088\u3046\u3068\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306a\u6319\u52d5\u306fSigmoid\u306b\u9650\u3089\u306a\u3044\u73fe\u8c61\u3067\u3059\u304c\u3001Sigmoid\u306e\u51fa\u529b\u30920\u306b\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u5165\u529b\u3092\\(-\\infty\\)\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u4e00\u5ea6\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u305d\u306e\u72b6\u614b\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3068\u629c\u3051\u51fa\u3059\u306e\u306b\u6642\u9593\u304c\u304b\u304b\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u305d\u306e\u3088\u3046\u9818\u57df\u3067\u306f\u8aa4\u5dee\u9006\u4f1d\u64ad\u306e\u52fe\u914d\u306e\u5024\u30820\u306b\u8fd1\u3065\u3044\u3066\u3044\u304d\u30011\u30b9\u30c6\u30c3\u30d7\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u66f4\u65b0\u91cf\u304c\u5c0f\u3055\u304f\u306a\u308b\u305f\u3081\u3001\u307e\u3059\u307e\u3059\u629c\u3051\u51fa\u3057\u306b\u304f\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u304c\u9577\u3044\u81a0\u7740\u72b6\u614b\u306e\u539f\u56e0\u3068\u63a8\u6e2c\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Softsign\u3084Hyperbolic Tangent\u306f\u51fa\u529b\u304c0\u306e\u9818\u57df\u306f\u5165\u529b\u304c0\u3067\u3001\u305d\u306e\u9818\u57df\u306f\u8fd1\u4f3c\u7684\u7dda\u5f62\u95a2\u6570\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u52fe\u914d\u30820\u306b\u306a\u3089\u306a\u3044\u305f\u3081\u3001\u81a0\u7740\u72b6\u614b\u304c\u9577\u5f15\u304f\u3088\u3046\u306a\u3053\u3068\u306f\u8d77\u304d\u306a\u3044\u3068\u63a8\u6e2c\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><strong>&#8220;\u901a\u5e38\u306e&#8221;\u521d\u671f\u5316\u65b9\u6cd5\u30fb\u6d3b\u6027\u5316\u95a2\u6570\u304cHyperbolic Tangent<\/strong>\u3067\u540c\u69d8\u306e\u89e3\u6790\u3092\u884c\u3063\u305f\u7d50\u679c\u304c\u56f32\u4e0a\u6bb5\u3067\u3059\u3002\u5b66\u7fd2\u306f5\u5c64\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u884c\u308f\u308c\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>Softmax\u306e\u6642\u306e\u3088\u3046\u306a\u6700\u7d42\u96a0\u308c\u5c64\u306e\u51fa\u529b\u304c\u98fd\u548c\u3059\u308b\u3053\u3068\u306f\u306a\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u5b66\u7fd2\u304c\u9032\u3080\u306b\u3057\u305f\u304c\u3063\u3066\u5165\u529b\u5c64\u5074\u304b\u3089\u51fa\u529b\u5c64\u5074\u306b\u5411\u3051\u3066\u9806\u3005\u306b\u98fd\u548c\u3059\u308b\u73fe\u8c61\u304c\u898b\u3089\u308c\u307e\u3059\u3002[1]\u3067\u306f\u3053\u308c\u306e\u539f\u56e0\u306e\u8003\u5bdf\u306f\u4fdd\u7559\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><strong>&#8220;\u901a\u5e38\u306e&#8221;\u521d\u671f\u5316\u65b9\u6cd5\u30fb\u6d3b\u6027\u5316\u95a2\u6570\u304cSoftsign<\/strong>\u306e\u89e3\u6790\u306f\u56f32\u4e0b\u6bb5\u3067\u3059\u3002\u5b66\u7fd2\u306f5\u5c64\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u884c\u308f\u308c\u305f\u3082\u306e\u3067\u3059\u3002\u3053\u3061\u3089\u306f\u3001\u51fa\u529b\u5c64\u30fb\u4e2d\u9593\u5c64\u304c\u98fd\u548c\u3059\u308b\u3053\u3068\u3082\u306a\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2168 aligncenter\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2020-p\/10\/glorot2.png\" alt=\"\" width=\"711\" height=\"531\" \/><\/p>\n<p style=\"text-align: center;\">\u56f32\uff1a\u53c2\u8003\u6587\u732e[1]\u3088\u308a\u629c\u7c8b<\/p>\n<p>\u3055\u3089\u306b\u5b66\u7fd2\u7d42\u4e86\u6642\u306e\u5404\u5c64\u306e\u51fa\u529b\u306e\u30d2\u30b9\u30c8\u30b0\u30e9\u30e0\u3092\u898b\u3066\u308b\u3068\uff08\u4ee5\u4e0b\u56f33\uff09\u3001Hyperbolic Tangent\u306e\u5834\u5408\uff08\u56f33\u4e0a\u6bb5\uff09\u306f\\(\\pm 1, 0\\)\u8fd1\u8fba\u306b\u5024\u304c\u96c6\u4e2d\u3057\u3066\u304a\u308a\u98fd\u548c\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e00\u65b9Softsign\u306e\u5834\u5408\uff08\u56f33\u4e0b\u6bb5\uff09\u306f\u305d\u306e\u3088\u3046\u306a\u73fe\u8c61\u304c\u898b\u53d7\u3051\u3089\u308c\u305a\u3001\u975e\u7dda\u5f62\u9818\u57df\\((-0.8,-0.6)\\)\u3001\\((0.6,0.8)\\)\u306b\u591a\u304f\u5024\u3092\u6301\u3061\u5b66\u7fd2\u304c\u826f\u597d\u306b\u9032\u3093\u3060\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2169 aligncenter\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2020-p\/10\/glorot3.png\" alt=\"\" width=\"693\" height=\"524\" \/><\/p>\n<p style=\"text-align: center;\">\u56f33\uff1a\u53c2\u8003\u6587\u732e[1]\u3088\u308a\u629c\u7c8b<\/p>\n<p>\u4ee5\u4e0a\u306e\u89e3\u6790\u304b\u3089\u3001\u5b66\u7fd2\u306e\u901f\u5ea6\u3084\u6d3b\u6027\u5316\u95a2\u6570\u306e\u72b6\u6cc1\u3092\u898b\u3066Softsign \\( &gt; \\) Hyperbolic Tangent \\( &gt; \\) Sigmoid\u304c\u6210\u308a\u7acb\u3061\u305d\u3046\u3067\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%88%9D%E6%9C%9F%E5%8C%96%E3%81%AE%E6%94%B9%E5%96%84\"><\/span>\u521d\u671f\u5316\u306e\u6539\u5584<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6d3b\u6027\u5316\u95a2\u6570\u306e\u89e3\u6790\u3067\u5206\u308b\u306e\u306f\u3001\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u3042\u308b\u5c64\u306e\u51fa\u529b\u304c\\(\\pm 1,0\\)\u7b49\u306b\u504f\u3063\u3066\u3057\u307e\u3063\u305f\u308a\u8aa4\u5dee\u9006\u4f1d\u64ad\u306b\u3088\u308b\u52fe\u914d\u306e\u60c5\u5831\u304c\u3046\u307e\u304f\u4f1d\u308f\u3089\u306a\u3044\u3053\u3068\u304c\u5b66\u7fd2\u306e\u9032\u884c\u3092\u9045\u304f\u3057\u305f\u308a\u7cbe\u5ea6\u3092\u4f4e\u4e0b\u3055\u305b\u308b\u539f\u56e0\u3068\u306a\u3063\u3066\u3044\u305d\u3046\u3060\u300d\u3068\u3044\u3046\u3053\u3068\u3067\u3057\u305f\u3002<\/p>\n<p>\u5c64\u3092\u6df1\u304f\u3057\u305f\u3068\u304d\u306b\u52fe\u914d\u306e\u5024\u304c0\uff08\\(\\pm \\infty \\)\uff09\u306b\u96c6\u4e2d\u3057\u3066\u3057\u307e\u3046\u73fe\u8c61\u306f\u52fe\u914d\u6d88\u5931\uff08\u7206\u767a\uff09\u3068\u8a00\u308f\u308c\u3066\u3044\u308b\u73fe\u8c61\u3067\u3059\u3002\u5c11\u306a\u304f\u3068\u3082\u521d\u671f\u5316\u306e\u6bb5\u968e\u3067\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u3053\u3068\u304c\u8d77\u3053\u3089\u306a\u3044\u3088\u3046\u306b\u3059\u308c\u3070\u3001\u5b66\u7fd2\u304c\u3042\u308b\u7a0b\u5ea6\u6539\u5584\u3057\u305d\u3046\u3067\u3059\u3002<\/p>\n<p>\u305d\u308c\u3092\u5b9f\u73fe\u3057\u305f\u306e\u304cXavier\u306e\u521d\u671f\u5316\u3067\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u521d\u671f\u5316\u306e\u6bb5\u968e\u3067\u5404\u5c64\u306e\u51fa\u529b\u3068\u3001\u8aa4\u5dee\u9006\u4f1d\u64ad\u306b\u3088\u308b\u52fe\u914d\u306e\u5206\u6563\u304c\u5c0f\u3055\u304f\u306a\u3089\u306a\u3044\u3088\u3046\u306b\uff08\uff1d\u5404\u5c64\u3067\u540c\u4e00\u306b\u306a\u308b\u3088\u3046\u306b\uff09\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u3067\u5177\u4f53\u7684\u306b\u5c0e\u51fa\u3057\u307e\u3059\u3002<\/p>\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u640d\u5931\u95a2\u6570\u3092\\(E\\)\u3068\u3059\u308b\u3068\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\\(s^{(i)}_{k}, w^{(i)}_{lk}\\)\u306e\u5fae\u5206\u306f\u4ee5\u4e0b\u3067\u66f8\u3051\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\(\\frac{\\partial E}{\\partial s^{(i)}_{k}}=\\left[ f^{\\prime}(s^{(i)})\\right]_{k}\\sum_{l}w^{(i+1)}_{lk}\\frac{\\partial E}{\\partial s^{(i+1)}_{l}}\\)<\/p>\n<p style=\"text-align: center;\">\\(\\frac{\\partial E}{\\partial w^{(i)}_{lk}}=z^{(i)}_{l}\\frac{\\partial E}{\\partial s^{(i)}_{k}}\\)<\/p>\n<p>\u5404\u5c64\u3067\u306e\u6d3b\u6027\u5316\u95a2\u6570\u306e\u51fa\u529b\u306e\u5206\u6563\\(Var\\left[z^{(i)}\\right]\\)\u3092\u540c\u4e00\u306b\u3001\u307e\u305f\u5404\u5c64\u3067\u306e\u8aa4\u5dee\u9006\u4f1d\u64ad\u306e\u52fe\u914d\u306e\u5206\u6563\\(Var\\left[\\frac{\\partial E}{\\partial s^{(i)}}\\right]\\)\u3092\u540c\u4e00\u306b\u3059\u308b\u3053\u3068\u3092\u8003\u3048\u307e\u3059\u3002<\/p>\n<p>\u6d3b\u6027\u5316\u95a2\u6570\u3092\u4e00\u822c\u306e\u307e\u307e\u306b\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u89e3\u6790\u304c\u8907\u96d1\u306b\u306a\u308b\u305f\u3081[1]\u3067\u306f\u300c<strong>\u6d3b\u6027\u5316\u95a2\u6570\u306f\u7dda\u5f62\u95a2\u6570\u300d<\/strong>\u3092\u4eee\u5b9a\u3057\u3066\u8b70\u8ad6\u3057\u3066\u3044\u307e\u3059<strong>\u3002<\/strong><\/p>\n<p>\u3064\u307e\u308a\u3001\\(f^{\\prime}(x)=1\\)\u3092\u4eee\u5b9a\u3057\u307e\u3059\u3002Softsign\u95a2\u6570\u3082Hyperbolic Tangent\u3082\u539f\u70b9\u4ed8\u8fd1\u3067\u306f\u8fd1\u4f3c\u7684\u306b\u3053\u306e\u6761\u4ef6\u304c\u6210\u308a\u7acb\u3063\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u300c<strong>\u521d\u671f\u5316\u306b\u95a2\u3057\u3066\u5e73\u57470\u306e\u5206\u5e03\u3092\u7528\u3044\u308b\u300d<\/strong>\u3053\u3068\u3082\u4eee\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4e00\u822c\u306b2\u3064\u306e\u72ec\u7acb\u306a\u78ba\u7387\u5909\u6570\u306e\\(X,Y\\)\u306e\u5e73\u5747\\(E\\left[ X\\right],E\\left[ Y\\right]\\)\u3001\u5206\u6563\\(Var\\left[ X\\right],Var\\left[ Y\\right]\\)\u3068\u305d\u306e\u548c\u3068\u7a4d\u306e\u5206\u6563\\(Var\\left[ X+Y\\right],Var\\left[ XY\\right]\\)\u306e\u95a2\u4fc2\u306f\u4ee5\u4e0b\u3067\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\( Var\\left[X+Y\\right]=Var\\left[X\\right]+Var\\left[Y\\right]\\)<\/p>\n<p style=\"text-align: center;\">\\( Var\\left[XY\\right]=Var\\left[X\\right]Var\\left[Y\\right]+Var\\left[X\\right]E\\left[Y\\right]^2+Var\\left[Y\\right]E\\left[X\\right]^2\\)<\/p>\n<p>\u3053\u3053\u3067\\(X,Y\\)\u306e\u5e73\u5747\u304c\\(0\\)\u3067\u3042\u308b\u3068\u4eee\u5b9a\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7a4d\u306e\u5206\u6563\u306f\u5206\u306e\u7a4d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\( Var\\left[XY\\right]=Var\\left[X\\right]Var\\left[Y\\right]\\)<\/p>\n<p>\u3053\u308c\u3089\u306e\u95a2\u4fc2\u3092\u7528\u3044\u308b\u3068\u3001\\(z^{(i)}\\)\u3068\\(\\frac{\\partial E}{\\partial s^{(i)}}\\)\u306e\u5206\u6563\\(Var\\left[z^{(i)}\\right]\\)\u3068\\( Var\\left[ \\frac{\\partial E}{\\partial s^{(i)}}\\right]\\)\u306f\u305d\u308c\u305e\u308c\u4ee5\u4e0b\u306e\u69d8\u306b\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\( Var\\left[z^{(i)}\\right]=Var\\left[x\\right]\\prod^{i-1}_{i^{\\prime}=0}n_{i^{\\prime}}Var\\left[w^{(i^{\\prime})}\\right]\\)<\/p>\n<p style=\"text-align: center;\">\\( Var\\left[ \\frac{\\partial E}{\\partial s^{(i)}}\\right]=Var\\left[ \\frac{\\partial E}{\\partial s^{d}}\\right]\\prod^{d-1}_{i^{\\prime}=i}n_{i^{\\prime}+1}Var\\left[w^{(i^{\\prime})}\\right]\\)<\/p>\n<p>\u5404\u5c64\u3067\u306e\u5206\u6563\u304c\u4e00\u5b9a\u3067\u3042\u308b\u305f\u3081\u306b\u306f\u3001\u5168\u3066\u306e\\(i,i^{\\prime}\\)\u3067\u4ee5\u4e0b\u304c\u6210\u308a\u7acb\u3064\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\( \\cases{ Var\\left[z^{(i)}\\right]=Var\\left[z^{(i^{\\prime})}\\right] \\\\ Var\\left[ \\frac{\\partial E}{\\partial s^{(i)}}\\right] =Var\\left[ \\frac{\\partial E}{\\partial s^{(i^{\\prime})}}\\right]}\\)<\/p>\n<p>\u3064\u307e\u308a\u3001\u4efb\u610f\u306e\\(i\\)\u306b\u5bfe\u3057\u3066\u4ee5\u4e0b\u304c\u6210\u308a\u7acb\u3066\u3070\u3088\u3044\u3067\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\( \\cases{ n_{i}Var\\left[w^{(i)}\\right]=1 \\\\ n_{i+1}Var\\left[w^{(i)}\\right]=1}\\)<\/p>\n<p>\u3053\u306e\u95a2\u4fc2\u306f\u3001\u4efb\u610f\u306e\\(i\\)\u306b\u5bfe\u3057\u3066\\(n_{i}=n_{i+1}\\)\u304c\u6210\u308a\u7acb\u3063\u3066\u3044\u306a\u3044\u9650\u308a\u89e3\u3092\u3082\u3061\u307e\u305b\u3093\u3002\u305d\u3053\u3067\u3053\u308c\u3089\u306e\u6761\u4ef6\u3092\u51fa\u6765\u308b\u9650\u308a\u6210\u308a\u7acb\u3064\u3088\u3046\u306b\u3001\u4ee5\u4e0b\u304c\u6210\u308a\u7acb\u3064\u3088\u3046\u8981\u8acb\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\(Var\\left[w^{(i)}\\right]=\\frac{2}{n_{i}+n_{i+1}}\\)<\/p>\n<p>\u3053\u306e\u3088\u3046\u306a\u8981\u8acb\u3092\u6e80\u305f\u3059\u521d\u671f\u5316\u304c[1]\u3067\u63d0\u6848\u3055\u308c\u3066\u3044\u308b\u521d\u671f\u5316\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n<p>\u3053\u308c\u304c\u6210\u308a\u7acb\u3064\u3088\u3046\u306b\u306f\u3069\u306e\u3088\u3046\u306a\u5206\u5e03\u3067\\(w\\)\u3092\u521d\u671f\u5316\u3057\u305f\u3089\u826f\u3044\u3067\u3057\u3087\u3046\u304b\u3002\u5e73\u5747\u304c0\u3067\u3042\u308c\u3070\u3069\u306e\u3088\u3046\u306a\u5206\u5e03\u3067\u3082\u826f\u3044\u306e\u3067\u3059\u304c\u3001\u53c2\u8003\u6587\u732e[1]\u3067\u306f\u4e00\u69d8\u5206\u5e03\u3092\u7528\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\\(w\\)\u3092\u4e00\u69d8\u5206\u5e03\\( U\\left[ -a,a\\right]\\)\u3067\u521d\u671f\u5316\u3057\u305f\u6642\u305d\u306e\u5206\u6563\u306f\\(\\frac{a^2}{3}\\)\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u5206\u6563\u304c\u5148\u306e\\(\\frac{2}{n_{i}+n_{i+1}}\\)\u3068\u4e00\u81f4\u3059\u308c\u3070\u3088\u3044\u305f\u3081\u4ee5\u4e0b\u306e\u5206\u5e03\u3067\u521d\u671f\u5316\u3059\u308c\u3070\u3088\u3044\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u3053\u308c\u304cXavier\u306e\u521d\u671f\u5316\u3067\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\( w^{(i)}\\sim U\\left[ -\\sqrt{\\frac{6}{n_{i}+n_{i+1}}},\\sqrt{\\frac{6}{n_{i}+n_{i+1}}}\\right]\\)<\/p>\n<p>\u5e73\u5747\u304c0\u3067\u5206\u6563\u304c\\(\\frac{2}{n_{i}+n_{i+1}}\\)\u3067\u3042\u308c\u3070\u3088\u3044\u306e\u3067\u3001\u4e00\u69d8\u5206\u5e03\u306b\u9650\u3089\u305a\u69d8\u3005\u306a\u5206\u5e03\u3067\u5b9f\u73fe\u53ef\u80fd\u3067\u3059\u3002\u4f8b\u3048\u3070\u5e73\u5747\\(\\mu\\)\u3001\u5206\u6563\\(\\sigma\\)\u306e\u6b63\u898f\u5206\u5e03\\(\\mathcal{N}(\\mu ,\\sigma )\\)\u306e\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u521d\u671f\u5316\u3059\u308c\u3070\u5148\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3057\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\( w^{(i)}\\sim \\mathcal{N}\\left(0,\\sqrt{\\frac{2}{n_{i}+n_{i+1}}}\\right)\\)<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%88%9D%E6%9C%9F%E5%8C%96%E3%81%AE%E9%81%95%E3%81%84%E3%81%AB%E3%82%88%E3%82%8B%E7%B2%BE%E5%BA%A6%E3%81%AE%E6%94%B9%E5%96%84\"><\/span>\u521d\u671f\u5316\u306e\u9055\u3044\u306b\u3088\u308b\u7cbe\u5ea6\u306e\u6539\u5584<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>[1]\u3067\u63d0\u6848\u3055\u308c\u305f\u521d\u671f\u5316\u3092\u7528\u3044\u308b\u3068\u3001\u5b66\u7fd2\u306e\u30c0\u30a4\u30ca\u30df\u30af\u30b9\u3084\u7cbe\u5ea6\u304c\u3069\u306e\u3088\u3046\u306b\u5909\u308f\u308b\u304b\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u521d\u671f\u5316\u76f4\u5f8c\u306e\u6d3b\u6027\u5316\u95a2\u6570\u306e\u30d2\u30b9\u30c8\u30b0\u30e9\u30e0\u3092\u898b\u3066\u307f\u308b\u3068\u56f34\u306b\u306a\u308a\u307e\u3059\u3002\u56f34\u4e0a\u6bb5\u304c&#8221;\u901a\u5e38\u306e&#8221;\u521d\u671f\u5316\u3067\u3001\u56f34\u4e0b\u6bb5\u304c\u4eca\u56de\u63d0\u6848\u3055\u308c\u305f\u521d\u671f\u5316\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2203 aligncenter\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2020-p\/10\/glorot4.png\" alt=\"\" width=\"565\" height=\"440\" \/><\/p>\n<p style=\"text-align: center;\">\u56f34\uff1a\u53c2\u8003\u6587\u732e[1]\u3088\u308a\u629c\u7c8b<\/p>\n<p>\u901a\u5e38\u306e\u521d\u671f\u5316\u306e\u5834\u5408\u306f\u51fa\u529b\u5c64\u306b\u8fd1\u3065\u304f\u306b\u3057\u305f\u304c\u3063\u3066\u5206\u6563\u304c\u5c0f\u3055\u304f\u306a\u308a0\u306b\u96c6\u4e2d\u3057\u3066\u3044\u308b\u306e\u306b\u5bfe\u3057\u3001\u63d0\u6848\u624b\u6cd5\u3067\u306f\u5404\u5c64\u540c\u3058\u3088\u3046\u306a\u5206\u5e03\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u540c\u69d8\u306b\u3001\u8aa4\u5dee\u9006\u4f1d\u64ad\u306e\u52fe\u914d\u306e\u30d2\u30b9\u30c8\u30b0\u30e9\u30e0\u3092\u8868\u3057\u305f\u306e\u304c\u4ee5\u4e0b\u306e\u56f35\u3067\u3059\u3002\u56f35\u4e0a\u6bb5\u304c&#8221;\u901a\u5e38\u306e&#8221;\u521d\u671f\u5316\u3067\u3001\u56f35\u4e0b\u6bb5\u304c\u4eca\u56de\u63d0\u6848\u3055\u308c\u305f\u521d\u671f\u5316\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2204 aligncenter\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2020-p\/10\/glorot5.png\" alt=\"\" width=\"570\" height=\"437\" \/><\/p>\n<p style=\"text-align: center;\">\u56f35\uff1a\u53c2\u8003\u6587\u732e[1]\u3088\u308a\u629c\u7c8b<\/p>\n<p>&#8220;\u901a\u5e38\u306e&#8221;\u521d\u671f\u5316\u65b9\u6cd5\u3067\u306f\u5165\u529b\u5c64\u306b\u8fd1\u3065\u304f\u306b\u3057\u305f\u304c\u3063\u3066\u52fe\u914d\u304c0\u306b\u96c6\u4e2d\u3057\u3066\u3044\u307e\u3059\u3002\u4e00\u65b9\u63d0\u6848\u3055\u308c\u305f\u624b\u6cd5\u3067\u306f\u5404\u5c64\u540c\u3058\u3088\u3046\u306a\u5206\u5e03\u3092\u6301\u3063\u3066\u304a\u308a\u3001\u5c11\u306a\u304f\u3068\u3082\u5b66\u7fd2\u521d\u671f\u3067\u306f\u52fe\u914d\u6d88\u5931\u304c\u8d77\u304d\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u3055\u3089\u306b\u521d\u671f\u5316\u306e\u9055\u3044\u306b\u3088\u308b\u30e2\u30c7\u30eb\u306e\u7cbe\u5ea6\u306e\u9055\u3044\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u30fb\u6d3b\u6027\u5316\u95a2\u6570\u30fb\u521d\u671f\u5316\u65b9\u6cd5\u306e\u9055\u3044\u306b\u3088\u308b\u7cbe\u5ea6\uff08\u30a8\u30e9\u30fc\u7387\uff09\u3092\u307e\u3068\u3081\u305f\u3082\u306e\u304c\u88681\u3067\u3059\u3002<\/p>\n<p>\u6d3b\u6027\u5316\u95a2\u6570\u540d\u306e\u5f8c\u306bN\u3068\u8868\u8a18\u3055\u308c\u3066\u3044\u308b\u3082\u306e\u304c\u63d0\u6848\u3055\u308c\u305f\u521d\u671f\u5316\u65b9\u6cd5\u306b\u3088\u308b\u3082\u306e\u3067\u3001\u7121\u5370\u306e\u3082\u306e\u304c&#8221;\u901a\u5e38\u306e&#8221;\u521d\u671f\u5316\u306b\u3088\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2205 aligncenter\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2020-p\/10\/glorot6.png\" alt=\"\" width=\"556\" height=\"194\" \/><\/p>\n<p style=\"text-align: center;\">\u88681\uff1a\u53c2\u8003\u6587\u732e[1]\u3088\u308a\u629c\u7c8b<\/p>\n<p>\u63d0\u6848\u3055\u308c\u305f\u521d\u671f\u5316\u624b\u6cd5\u3092\u7528\u3044\u305f\u65b9\u304c\u6982\u306d&#8221;\u901a\u5e38\u306e&#8221;\u521d\u671f\u5316\u65b9\u6cd5\u306b\u6bd4\u3079\u7cbe\u5ea6\u304c\u9ad8\u304f\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u521d\u671f\u5316\u306e\u65b9\u6cd5\u304c\u30c0\u30a4\u30ca\u30df\u30af\u30b9\u3060\u3051\u3067\u306f\u306a\u304f\u6700\u7d42\u7684\u306a\u7d50\u679c\u306b\u307e\u3067\u5f71\u97ff\u3092\u4e0e\u3048\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u6700\u5f8c\u306b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30c0\u30a4\u30ca\u30df\u30af\u30b9\u3092\u307e\u3068\u3081\u305f\u3082\u306e\u304c\u4ee5\u4e0b\u306e\u56f36\u3067\u3059\u3002\u8a73\u7d30\u306f\u8ad6\u6587\u306b\u3042\u305f\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u304c\u3001\u521d\u671f\u5316\u306e\u9055\u3044\u306b\u3088\u308a\u521d\u671f\u3067\u306e\u5b66\u7fd2\u306e\u9032\u307f\u65b9\u306b\u5dee\u7570\u304c\u751f\u3058\u3066\u3044\u308b\u3053\u3068\u304c\u898b\u3066\u53d6\u308c\u307e\u3059\u3002<\/p>\n<p>\u307e\u305fSigmoid\u95a2\u6570\u306e\u5834\u5408\u30014\u5c64\u306e\u5834\u5408\u81a0\u7740\u72b6\u614b\u306e\u8131\u51fa\u306b\u304b\u306a\u308a\u306e\u6642\u9593\u3092\u8981\u3057\u3066\u304a\u308a\u7279\u306b5\u5c64\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u5834\u5408\u3067\u306f\u8131\u51fa\u3067\u304d\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2206 aligncenter\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2020-p\/10\/glorot7.png\" alt=\"\" width=\"617\" height=\"446\" \/><\/p>\n<p style=\"text-align: center;\">\u56f36\uff1a\u53c2\u8003\u6587\u732e[1]\u3088\u308a\u629c\u7c8b<\/p>\n<h2><span class=\"ez-toc-section\" id=\"He%E3%81%AE%E5%88%9D%E6%9C%9F%E5%8C%96\"><\/span>He\u306e\u521d\u671f\u5316<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u3053\u3053\u3067\u306fHe\u306e\u521d\u671f\u5316[2]\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002Xavier\u306e\u521d\u671f\u5316\u3067\u306f\u6d3b\u6027\u5316\u95a2\u6570\u304c\u7dda\u5f62\u3067\u3042\u308b\u3053\u3068\u3092\u4eee\u5b9a\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u308c\u3092\u975e\u7dda\u5f62\u7cfb\u95a2\u6570\u306b\u62e1\u5f35\u3057\u305f\u306e\u304c\u6b21\u306b\u7d39\u4ecb\u3059\u308b\u53c2\u8003\u6587\u732e[2]\u306e\u5185\u5bb9\u3067\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%88%9D%E6%9C%9F%E5%8C%96%E3%81%AE%E6%8B%A1%E5%BC%B5\"><\/span>\u521d\u671f\u5316\u306e\u62e1\u5f35<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u3053\u3053\u3067\u8003\u3048\u308b\u975e\u7dda\u5f62\u95a2\u6570\u306fReLU\u82e5\u3057\u304f\u306fPReLU\u3067\u3059\u3002PReLU\u3068\u306f\\(a\\)\u3092\u5b9f\u6570\u3068\u3057\u305f\u3068\u304d(\u901a\u5e38\u306f\\(0\\leq a&lt;1\\))\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u95a2\u6570\u3067\u3059\u3002\\(a=0\\)\u306e\u5834\u5408\u306f\u7279\u5225\u306bReLU\u3068\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\(f(x)=\\cases{x \\mbox{ for } x &gt; 0\\\\ax \\mbox{ for } x\\leq 0}\\)<\/p>\n<p>[1]\u306e\u521d\u671f\u5316\u306e\u5c0e\u51fa\u3067\u306f\u3001\u7dda\u5f62\u306a\u95a2\u6570(\\(a=1\\))\u3092\u4eee\u5b9a\u3057\u3066\u3057\u3066\u3044\u305f\u305f\u3081\u6d3b\u6027\u5316\u95a2\u6570\u306e\u51fa\u529b\u306e\u5e73\u5747\u306f0\u3068\u3057\u3066\u826f\u304b\u3063\u305f\u3067\u3059\u304c\u3001ReLU\u3084PReLU\u306e\u5834\u5408\u306f\u975e\u5bfe\u79f0\u3067\u3042\u308b\u305f\u3081\u3001\u305d\u3046\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u5e73\u5747\u304c\u30bc\u30ed\u3067\u306a\u3044\u305f\u3081Xavier\u306e\u521d\u671f\u5316\u306e\u7ae0\u3067\u89e3\u8aac\u3057\u305f\u3088\u3046\u306b\u3001\u78ba\u7387\u5909\u6570\u306e\u7a4d\u306e\u5206\u6563\u306f\u5206\u6563\u306e\u7a4d\u306b\u306a\u308a\u307e\u305b\u3093(\\(Var\\left[ XY \\right] \\neq Var\\left[ X \\right] Var\\left[ Y \\right]\\))\u3002\u3053\u306e\u70b9\u3092\u4fee\u6b63\u3057\u305f\u3082\u306e\u304cHe\u306e\u521d\u671f\u5316\u3067\u3059\u3002<\/p>\n<p>\u5177\u4f53\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5909\u66f4\u3055\u308c\u307e\u3059\u3002\\(w\\)\u81ea\u4f53\u306f\u5e73\u57470\u306e\u5bfe\u79f0\u306a\u5206\u5e03\u3067\u521d\u671f\u5316\u3055\u308c\u308b\u305f\u3081\u5909\u66f4\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u6d3b\u6027\u5316\u95a2\u6570\u3092\u901a\u3057\u305f\u5f8c\u306e\\(z\\)\u306b\u95a2\u3057\u3066\u306f\u5e73\u5747\u306f0\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3064\u307e\u308a\u3001\u9806\u4f1d\u64ad\u306e\u5206\u6563\u306fXavier\u306e\u521d\u671f\u5316\u306e\u7ae0\u3067\u306e\u8a08\u7b97\u304b\u3089\u4ee5\u4e0b\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\( \\begin{eqnarray}Var\\left[ s^{(i)}\\right] &amp;=&amp; n_{i}Var\\left[ w^{(i)}z^{(i)}\\right] \\\\ &amp;=&amp; n_{i}Var\\left[ w^{(i)}\\right] E\\left[z^{(i)}{}^2\\right] \\\\ &amp;=&amp; \\frac{1}{2}(1+a^2)n_{i}Var\\left[ w^{(i)}\\right] Var\\left[s^{(i-1)}\\right] \\end{eqnarray}\\)<\/p>\n<p>2\u6bb5\u76ee\u306e\u7b49\u5f0f\u304c\u5909\u66f4\u70b9\u3067\u3059\u30023\u6bb5\u76ee\u306e\u7b49\u5f0f\u3067PReLU\u306e\u95a2\u6570\u5f62\u306e\u60c5\u5831\u3092\u7528\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u9006\u4f1d\u64ad\u306e\u52fe\u914d\u306e\u5206\u6563\u3082\u540c\u69d8\u306b\u4ee5\u4e0b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\( \\begin{eqnarray}Var\\left[ \\frac{\\partial E}{\\partial z^{(i)}}\\right] &amp;=&amp; n_{i+1}Var\\left[ w^{(i)} \\frac{\\partial E}{\\partial s^{(i)}}\\right] \\\\ &amp;=&amp; n_{i+1}Var\\left[ w^{(i)} \\right] Var\\left[ \\frac{\\partial E}{\\partial s^{(i)}}\\right] \\\\ &amp;=&amp; \\frac{1}{2}(1+a^2)n_{i+1}Var\\left[ w^{(i)} \\right] Var\\left[ \\frac{\\partial E}{\\partial z^{(i+1)}}\\right] \\end{eqnarray}\\)<\/p>\n<p>2\u6bb5\u76ee\u306e\u7b49\u5f0f\u3067\\(w^{(i)}\\)\u3068\\( \\frac{\\partial E}{\\partial s^{(i)}} \\)\u304c\u72ec\u7acb\u3068\u3044\u3046\u4eee\u5b9a\u3092\u7528\u3044\u3066\u3044\u307e\u3059\u30023\u6bb5\u76ee\u306e\u7b49\u5f0f\u3067PReLU\u306e\u95a2\u6570\u5f62\u306e\u60c5\u5831\u3092\u7528\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0a\u304b\u3089\u4efb\u610f\u306e\\(i\\)\u3067\u4ee5\u4e0b\u304c\u6210\u308a\u7acb\u3061\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\( Var\\left[s^{(i)}\\right]=Var\\left[x\\right]\\prod^{i-1}_{i^{\\prime}=0}\\frac{1}{2}(1+a^2)n_{i^{\\prime}}Var\\left[w^{(i^{\\prime})}\\right]\\)<\/p>\n<p style=\"text-align: center;\">\\( Var\\left[ \\frac{\\partial E}{\\partial z^{(i)}}\\right]=Var\\left[ \\frac{\\partial E}{\\partial s^{d}}\\right]\\prod^{d-1}_{i^{\\prime}=i}\\frac{1}{2}(1+a^2)n_{i^{\\prime}+1}Var\\left[w^{(i^{\\prime})}\\right]\\)<\/p>\n<p>Xavier\u306e\u521d\u671f\u5316\u306e\u6642\u3068\u540c\u69d8\u306b\u3001\u5206\u6563\u304c\u4e00\u5b9a\u3067\u3042\u308b\u305f\u3081\u306b\u306f\u4ee5\u4e0b\u304c\u6210\u308a\u7acb\u3066\u3070\u3088\u3044\u3067\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\(\\cases{ \\frac{1}{2}(1+a^2)n_{i}Var\\left[w^{(i)}\\right]=1 \\\\ \\frac{1}{2}(1+a^2)n_{i+1}Var\\left[w^{(i)}\\right]=1}\\)<\/p>\n<p>\u3053\u306e\u95a2\u4fc2\u306f\u4efb\u610f\u306e\\(i\\)\u306b\u5bfe\u3057\u3066\\(n_{i}=n_{i+1}\\)\u304c\u6210\u308a\u7acb\u3063\u3066\u3044\u306a\u3044\u9650\u308a\u89e3\u3092\u3082\u3061\u307e\u305b\u3093\u3002<\/p>\n<p>Xavier\u306e\u521d\u671f\u5316\u306e\u5834\u5408\u306f\u3001\u305d\u3053\u3067\u3053\u308c\u3089\u306e\u6761\u4ef6\u3092\u51fa\u6765\u308b\u9650\u308a\u6210\u308a\u7acb\u3064\u3088\u3046\u306b\u4ee5\u4e0b\u304c\u6210\u308a\u7acb\u3064\u3088\u3046\u306b\u3057\u307e\u3057\u305f\u304c\u3001[1]\u3067\u306f\u3069\u3061\u3089\u304b\u4e00\u65b9\u304c\u6210\u308a\u7acb\u3064\u3088\u3046\u306b\u8981\u8acb\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u4ee5\u4e0b\u306e\u3069\u3061\u3089\u304b\u3092\u6e80\u305f\u3059\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\(\\cases{ Var\\left[w^{(i)}\\right]=\\frac{2}{(1+a^2)n_{i}} \\mbox{ for all } i \\\\ Var\\left[w^{(i)}\\right]=\\frac{2}{(1+a^2)n_{i+1}} \\mbox{ for all } i }\\)<\/p>\n<p>\u3053\u306e\u3088\u3046\u306a\u8981\u8acb\u3092\u6e80\u305f\u3059\u521d\u671f\u5316\u304c[2]\u3067\u63d0\u6848\u3055\u308c\u3066\u3044\u308bHe\u306e\u521d\u671f\u5316\u3067\u3059\u3002<\/p>\n<p>\u4e00\u69d8\u5206\u5e03\u306e\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u306e\u3069\u3061\u3089\u304b\u3092\u6e80\u305f\u3059\u3088\u3046\u306b\u3059\u308c\u3070\u826f\u3044\u3067\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\( \\cases{ w^{(i)}\\sim U\\left[ -\\sqrt{\\frac{6}{(1+a^2)n_{i}}},\\sqrt{\\frac{6}{(1+a^2)n_{i}}}\\right] \\mbox{ for all } i \\\\ w^{(i)}\\sim U\\left[ -\\sqrt{\\frac{6}{(1+a^2)n_{i+1}}},\\sqrt{\\frac{6}{(1+a^2)n_{i+1}}}\\right] \\mbox{ for all } i }\\)<\/p>\n<p>\u307e\u305f\u6b63\u898f\u5206\u5e03\u306e\u5834\u5408\u3001\u4efb\u610f\u306e\\(i\\)\u306b\u5bfe\u3057\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u521d\u671f\u5316\u3059\u308c\u3070\u5148\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3057\u307e\u3059\u3002<\/p>\n<p style=\"text-align: center;\">\\(\\cases{w^{(i)}\\sim \\mathcal{N}\\left(0,\\sqrt{\\frac{2}{(1+a^2)n_{i}}}\\right) \\\\ w^{(i)}\\sim \\mathcal{N}\\left(0,\\sqrt{\\frac{2}{(1+a^2)n_{i+1}}}\\right)}\\)<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%88%9D%E6%9C%9F%E5%8C%96%E3%81%AE%E9%81%95%E3%81%84%E3%81%AB%E3%82%88%E3%82%8B%E7%B2%BE%E5%BA%A6%E5%B7%AE\"><\/span>\u521d\u671f\u5316\u306e\u9055\u3044\u306b\u3088\u308b\u7cbe\u5ea6\u5dee<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>[2]\u3067\u306fImagenet\u306e\u753b\u50cf\u8b58\u5225\u30bf\u30b9\u30af\u3092\u5b66\u7fd2\u3055\u305b\u3066\u7cbe\u5ea6\u306e\u6bd4\u8f03\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306fVGG\u3092\u57fa\u672c\u3068\u3057\u305f\u3082\u306e\u3092\u63a1\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u8a73\u7d30\u306f[2]\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u6d3b\u6027\u5316\u95a2\u6570\u306bReLU\u3092\u7528\u3044\u305f\u5834\u5408\u306b\u3001\u5148\u306eXavier\u306e\u65b9\u6cd5\u3067\u521d\u671f\u5316\u3057\u305f\u5834\u5408\u3068[2]\u306e\u65b9\u6cd5\u3067\u521d\u671f\u5316\u3057\u305f\u5834\u5408\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u5b66\u7fd2\u904e\u7a0b\u3092\u793a\u3057\u305f\u3082\u306e\u304c\u56f37\u3068\u56f38\u3067\u3059\u3002<\/p>\n<p>\u56f37\u306f22\u5c64\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u5b66\u7fd2\u3055\u305b\u305f\u3082\u306e\u3067\u3001\u56f38\u306f30\u5c64\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u5b66\u7fd2\u3055\u305b\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2263 aligncenter\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2020-p\/10\/glorot8.png\" alt=\"\" width=\"437\" height=\"253\" \/><\/p>\n<p style=\"text-align: center;\">\u56f37\uff1a\u53c2\u8003\u6587\u732e[2]\u3088\u308a\u629c\u7c8b<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-2264 aligncenter\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2020-p\/10\/glorot9.png\" alt=\"\" width=\"441\" height=\"245\" \/><\/p>\n<p style=\"text-align: center;\">\u56f38\uff1a\u53c2\u8003\u6587\u732e[2]\u3088\u308a\u629c\u7c8b<\/p>\n<p>\u6d3b\u6027\u5316\u95a2\u6570\u306bReLU\u3092\u7528\u3044\u3066\u304a\u308a[1]\u306e\u65b9\u6cd5\u3067\u60f3\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u72b6\u6cc1\u306a\u306e\u3067\u3001\u30d5\u30a7\u30a2\u306a\u6bd4\u8f03\u3067\u306f\u306a\u3044\u3067\u3059\u304c\u300122\u5c64\u306e\u5834\u5408\u306f[2]\u306e\u65b9\u6cd5\u304c\u5b66\u7fd2\u304c\u901f\u304f\u9032\u3093\u3067\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u5c64\u6570\u309230\u307e\u3067\u591a\u304f\u3057\u3066\u307f\u308b\u3068\u3001[1]\u306e\u65b9\u6cd5\u3067\u306f\u307e\u3063\u305f\u304f\u5b66\u7fd2\u304c\u9032\u307e\u306a\u304f\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u6d3b\u6027\u5316\u95a2\u6570\u306b\u3088\u3063\u3066\u521d\u671f\u5316\u306e\u65b9\u6cd5\u3092\u5909\u3048\u308b\u5fc5\u8981\u6027\u304c\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u3092\u793a\u5506\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u305d\u306e\u521d\u671f\u5316\u306e\u5f71\u97ff\u306f\u5c64\u3092\u6df1\u304f\u3059\u308b\u3068\u3088\u308a\u9855\u8457\u306b\u8868\u308c\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E3%81%BE%E3%81%A8%E3%82%81\"><\/span>\u307e\u3068\u3081<span 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Connection\u306f\u5f37\u529b\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u69cb\u9020\u3067\u3042\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u7701\u7565\u3057\u305f\u90e8\u5206\u3082\u3042\u308b\u306e\u3067\u3001\u8a73\u7d30\u304c\u6c17\u306b\u306a\u308b\u65b9\u306f\u5143\u8ad6\u6587[1][2]\u306b\u3042\u305f\u3089\u308c\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<div class=\"st-header-flexwrap\" style=\"height: auto; width: 100%; box-sizing: border-box; background-color: #efefef; border-radius: 5px; border: solid #ccc 1px; padding: 20px; margin-bottom: 0px;\">\n<div class=\"st-header-flexbox\">\n<p class=\"st-header-flextitle\" style=\"font-size: 110%; color: #000;\">\u7269\u4f53\u691c\u51fa\u306a\u3069AI\u6a5f\u68b0\u5b66\u7fd2\u3092\u6d3b\u7528\u3057\u305f\u30b7\u30b9\u30c6\u30e0\u306e\u69cb\u7bc9\u306b\u95a2\u3059\u308b\u3054\u76f8\u8ac7\uff08\u7121\u6599\uff09\u3092\u627f\u3063\u3066\u3044\u307e\u3059<\/p>\n<p><span class=\"st-mybtn st-mybtn-mini\"><a style=\"background: #01579b; border-radius: 5px; font-weight: normal; color: #fff; box-shadow: 0 3px 0 #01579b;\" href=\"https:\/\/www.informatix.co.jp\/contact-us\/\" target=\"_blank\" rel=\"noopener\">\u304a\u6c17\u8efd\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u304f\u3060\u3055\u3044<i class=\"fa fa-after fa-angle-right st-css-no\" aria-hidden=\"true\"><\/i><\/a><\/span><\/p>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%8F%82%E8%80%83%E6%96%87%E7%8C%AE\"><\/span>\u53c2\u8003\u6587\u732e<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>[1]Glorot, X. &amp; Bengio, Y.. (2010). Understanding the difficulty of training deep feedforward neural networks.\u00a0<i>Proceedings of the Thirteenth International Conference on Artificial Intelligence and Statistics, in PMLR<\/i>\u00a09:249-256<\/p>\n<p>[2]He, Kaiming &amp; Zhang, Xiangyu &amp; Ren, Shaoqing &amp; Sun, Jian. (2015). Delving Deep into Rectifiers: Surpassing Human-Level Performance on ImageNet Classification. IEEE International Conference on Computer Vision (ICCV 2015). 1502. 10.1109\/ICCV.2015.123.<br \/>\n<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001\u30a4\u30f3\u30d5\u30a9\u30de\u30c6\u30a3\u30af\u30b9\u3067\u6a5f\u68b0\u5b66\u7fd2\u696d\u52d9\u3092\u62c5\u5f53\u3057\u3066\u3044\u308b\u5927\u6a4b\u3067\u3059\u3002 \u4eca\u56de\u306f\u521d\u5fc3\u306b\u8fd4\u3063\u3066\u3001\u6df1\u5c64\u5b66\u7fd2\u3067\u7528\u3044\u3089\u308c\u308b\u6d3b\u6027\u5316\u95a2\u6570\u306e\u6027\u8cea\u3084\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u521d\u671f\u5316\u3092\u30c6\u30fc\u30de\u306b\u53d6\u308a\u4e0a\u3052\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002 \u306f\u3058\u3081\u306b \u6d3b\u6027\u5316\u95a2 &#8230; <\/p>\n","protected":false},"author":11,"featured_media":11277,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[589,4],"tags":[716],"class_list":["post-11274","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ai","category-4","tag-716"],"jetpack_featured_media_url":"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2020\/11\/glorot1.png","_links":{"self":[{"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/11274","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11274"}],"version-history":[{"count":25,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/11274\/revisions"}],"predecessor-version":[{"id":19966,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/11274\/revisions\/19966"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/media\/11277"}],"wp:attachment":[{"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11274"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11274"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}