{"id":3379,"date":"2022-02-27T15:32:54","date_gmt":"2022-02-27T07:32:54","guid":{"rendered":"https:\/\/egonlin.com\/?p=3379"},"modified":"2022-02-27T15:32:54","modified_gmt":"2022-02-27T07:32:54","slug":"%e7%ac%ac%e4%b8%83%e7%af%87%ef%bc%9a%e5%be%ae%e7%a7%af%e5%88%86-sigmoid%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/egonlin.com\/?p=3379","title":{"rendered":"\u7b2c\u4e03\u7bc7\uff1a\u5fae\u79ef\u5206-Sigmoid\u51fd\u6570"},"content":{"rendered":"<h1>Sigmoid\u51fd\u6570<\/h1>\n<h1>Sigmoid\u51fd\u6570\u8be6\u89e3<\/h1>\n<pre><code class=\"language-python\"># Sigmoid\u51fd\u6570\u8be6\u89e3\u56fe\u4f8b\nimport numpy as np\nimport matplotlib.pyplot as plt\n\nax = plt.subplot(111)\n\nax.spines[&#039;right&#039;].set_color(&#039;none&#039;)\nax.spines[&#039;top&#039;].set_color(&#039;none&#039;)\nax.xaxis.set_ticks_position(&#039;bottom&#039;)\nax.spines[&#039;bottom&#039;].set_position((&#039;data&#039;, 0))\nax.yaxis.set_ticks_position(&#039;left&#039;)\nax.spines[&#039;left&#039;].set_position((&#039;data&#039;, 0))\n\nx = np.linspace(-10, 10, 256)\ny = 1 \/ (1 + np.exp(-x))\nplt.plot(x, y, c=&#039;r&#039;, label=&#039;Sigmoid&#039;)\n\n# \u63cf\u7ed8y=0.5\u548cy=1.0\u4e24\u6761\u76f4\u7ebf\nplt.yticks([0.0,0.5,1.0])\nax = plt.gca()\nax.yaxis.grid(True)\n\nplt.xlabel(&#039;z&#039;)\nplt.ylabel(&#039;g(z)&#039;)\nplt.legend()\nplt.show()<\/code><\/pre>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/egonlin.com\/wp-content\/uploads\/2022\/02\/\u5fae\u79ef\u5206-Sigmoid\u51fd\u6570_2_0.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  data-original=\"https:\/\/egonlin.com\/wp-content\/uploads\/2022\/02\/\u5fae\u79ef\u5206-Sigmoid\u51fd\u6570_2_0.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" \/><\/div><\/p>\n<p>&emsp;&emsp;\u4e0a\u56fe\u4e3aSigmoid\u51fd\u6570\u56fe\u50cf\uff0c\u53ef\u4ee5\u770b\u51fa\u5f53$z$\u8d8b\u4e8e\u6b63\u65e0\u7a77\u65f6\uff0c$g(z)$\u8d8b\u4e8e1\uff1b\u5f53$z$\u8d8b\u4e8e\u8d1f\u65e0\u7a77\u65f6\uff0c$g(z)$\u8d8b\u4e8e0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sigmoid\u51fd\u6570 Sigmoid\u51fd\u6570\u8be6\u89e3 # Sigmoid\u51fd\u6570\u8be6\u89e3\u56fe\u4f8b import numpy as n [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":3360,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[276,303,305],"tags":[],"_links":{"self":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/3379"}],"collection":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3379"}],"version-history":[{"count":0,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/3379\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/media\/3360"}],"wp:attachment":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3379"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3379"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}