{"id":16271,"date":"2026-03-09T10:54:49","date_gmt":"2026-03-09T02:54:49","guid":{"rendered":"http:\/\/xinyiworld.top\/wordpress_it\/?p=16271"},"modified":"2026-03-09T11:01:43","modified_gmt":"2026-03-09T03:01:43","slug":"%e4%bd%8e%e9%80%9a%e6%bb%a4%e6%b3%a2-low-pass","status":"publish","type":"post","link":"http:\/\/xinyiworld.top\/wordpress_it\/?p=16271","title":{"rendered":"\u4f4e\u901a\u6ee4\u6ce2 (Low-pass)"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_16 counter-hierarchy counter-decimal ez-toc-grey\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<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=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=16271\/#%E4%BD%8E%E9%80%9A%E6%BB%A4%E6%B3%A2%E7%AE%97%E6%B3%95%E9%80%9A%E4%BF%97%E8%A7%A3%E9%87%8A\" title=\"\u4f4e\u901a\u6ee4\u6ce2\u7b97\u6cd5\u901a\u4fd7\u89e3\u91ca\">\u4f4e\u901a\u6ee4\u6ce2\u7b97\u6cd5\u901a\u4fd7\u89e3\u91ca<\/a><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=16271\/#1_%E6%9C%80%E7%9B%B4%E8%A7%82%E7%9A%84%E7%90%86%E8%A7%A3%EF%BC%9A%E7%AD%9B%E5%AD%90\" title=\"1. \u6700\u76f4\u89c2\u7684\u7406\u89e3\uff1a\u7b5b\u5b50\">1. \u6700\u76f4\u89c2\u7684\u7406\u89e3\uff1a\u7b5b\u5b50<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=16271\/#2_%E7%94%9F%E6%B4%BB%E4%B8%AD%E7%9A%84%E7%B1%BB%E6%AF%94\" title=\"2. \u751f\u6d3b\u4e2d\u7684\u7c7b\u6bd4\">2. \u751f\u6d3b\u4e2d\u7684\u7c7b\u6bd4<\/a><ul class=\"ez-toc-list-level-4\"><li class=\"ez-toc-heading-level-4\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=16271\/#%E7%B1%BB%E6%AF%941%EF%BC%9A%E6%B1%BD%E8%BD%A6%E5%87%8F%E9%9C%87%E5%99%A8\" title=\"\u7c7b\u6bd41\uff1a\u6c7d\u8f66\u51cf\u9707\u5668\">\u7c7b\u6bd41\uff1a\u6c7d\u8f66\u51cf\u9707\u5668<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=16271\/#3_%E6%95%B0%E5%AD%A6%E5%8E%9F%E7%90%86\" title=\"3. \u6570\u5b66\u539f\u7406\">3. \u6570\u5b66\u539f\u7406<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=16271\/#4_%CE%B1_%E5%80%BC%E7%9A%84%E5%BD%B1%E5%93%8D\" title=\"4. \u03b1 \u503c\u7684\u5f71\u54cd\">4. \u03b1 \u503c\u7684\u5f71\u54cd<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-7\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=16271\/#5_%E5%9C%A8%E9%9F%B3%E9%A2%91%E5%A4%84%E7%90%86%E4%B8%AD%E7%9A%84%E5%BA%94%E7%94%A8\" title=\"5. \u5728\u97f3\u9891\u5904\u7406\u4e2d\u7684\u5e94\u7528\">5. \u5728\u97f3\u9891\u5904\u7406\u4e2d\u7684\u5e94\u7528<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-8\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=16271\/#6_%E4%B8%80%E5%8F%A5%E8%AF%9D%E6%80%BB%E7%BB%93\" title=\"6. \u4e00\u53e5\u8bdd\u603b\u7ed3\">6. \u4e00\u53e5\u8bdd\u603b\u7ed3<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%E4%BD%8E%E9%80%9A%E6%BB%A4%E6%B3%A2%E7%AE%97%E6%B3%95%E9%80%9A%E4%BF%97%E8%A7%A3%E9%87%8A\"><\/span>\u4f4e\u901a\u6ee4\u6ce2\u7b97\u6cd5\u901a\u4fd7\u89e3\u91ca<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_%E6%9C%80%E7%9B%B4%E8%A7%82%E7%9A%84%E7%90%86%E8%A7%A3%EF%BC%9A%E7%AD%9B%E5%AD%90\"><\/span>1. <strong>\u6700\u76f4\u89c2\u7684\u7406\u89e3\uff1a\u7b5b\u5b50<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u60f3\u8c61\u4e00\u4e2a\u7b5b\u5b50\uff1a<\/p>\n<ul>\n<li><strong>\u9ad8\u901a<\/strong>\uff1a\u8ba9\u5927\u9897\u7c92\u901a\u8fc7\uff0c\u7b5b\u6389\u5c0f\u9897\u7c92<\/li>\n<li><strong>\u4f4e\u901a<\/strong>\uff1a\u8ba9\u5c0f\u9897\u7c92\u901a\u8fc7\uff0c\u7b5b\u6389\u5927\u9897\u7c92<\/li>\n<\/ul>\n<p>\u5728\u4fe1\u53f7\u5904\u7406\u4e2d\uff1a<\/p>\n<ul>\n<li><strong>\u9ad8\u9891<\/strong> = \u5feb\u901f\u53d8\u5316\uff08\u6296\u52a8\u3001\u566a\u58f0\uff09<\/li>\n<li><strong>\u4f4e\u9891<\/strong> = \u7f13\u6162\u53d8\u5316\uff08\u8d8b\u52bf\u3001\u4e3b\u4f53\uff09<\/li>\n<\/ul>\n<p><strong>\u4f4e\u901a\u6ee4\u6ce2<\/strong>\u5c31\u662f\uff1a<strong>\u5141\u8bb8\u7f13\u6162\u53d8\u5316\u901a\u8fc7\uff0c\u8fc7\u6ee4\u6389\u5feb\u901f\u6296\u52a8<\/strong><\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_%E7%94%9F%E6%B4%BB%E4%B8%AD%E7%9A%84%E7%B1%BB%E6%AF%94\"><\/span>2. <strong>\u751f\u6d3b\u4e2d\u7684\u7c7b\u6bd4<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"%E7%B1%BB%E6%AF%941%EF%BC%9A%E6%B1%BD%E8%BD%A6%E5%87%8F%E9%9C%87%E5%99%A8\"><\/span>\u7c7b\u6bd41\uff1a\u6c7d\u8f66\u51cf\u9707\u5668<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>text<\/p>\n<pre><code>\u8def\u9762\u51f9\u51f8\uff08\u9ad8\u9891\u9707\u52a8\uff09 \u2192 \u51cf\u9707\u5668\uff08\u4f4e\u901a\u6ee4\u6ce2\uff09 \u2192 \u8f66\u8eab\u5e73\u7a33\uff08\u4f4e\u9891\uff09\n      \u2191                        \u2191                      \u2191\n   \u5feb\u901f\u6296\u52a8                 \u8fc7\u6ee4\u6296\u52a8               \u5e73\u6ed1\u884c\u9a76<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"3_%E6%95%B0%E5%AD%A6%E5%8E%9F%E7%90%86\"><\/span>3. <strong>\u6570\u5b66\u539f\u7406<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4f4e\u901a\u6ee4\u6ce2\u5668\u7684\u6838\u5fc3\u662f<strong>\u52a0\u6743\u5e73\u5747<\/strong>\uff1a<\/p>\n<ul>\n<li>\u7ed9\u5f53\u524d\u503c\u4e00\u4e2a\u6743\u91cd\uff08\u5982 0.7\uff09<\/li>\n<li>\u7ed9\u5386\u53f2\u503c\u4e00\u4e2a\u6743\u91cd\uff08\u5982 0.3\uff09<\/li>\n<li>\u6743\u91cd\u4e4b\u548c\u4e3a 1<\/li>\n<\/ul>\n<p>kotlin<\/p>\n<pre><code>\/\/ \u901a\u7528\u516c\u5f0f\ny[n] = \u03b1 \u00d7 x[n] + (1-\u03b1) \u00d7 y[n-1]\n\n\u5176\u4e2d\uff1a\ny[n] = \u5f53\u524d\u8f93\u51fa\nx[n] = \u5f53\u524d\u8f93\u5165\ny[n-1] = \u4e0a\u4e00\u6b21\u8f93\u51fa\n\u03b1 = \u6ee4\u6ce2\u7cfb\u6570\uff080-1\u4e4b\u95f4\uff09<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"4_%CE%B1_%E5%80%BC%E7%9A%84%E5%BD%B1%E5%93%8D\"><\/span>4. <strong>\u03b1 \u503c\u7684\u5f71\u54cd<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">\u03b1<\/th>\n<th style=\"text-align: left;\">\u7279\u6027<\/th>\n<th style=\"text-align: left;\">\u6bd4\u55bb<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\">0.1<\/td>\n<td style=\"text-align: left;\">\u975e\u5e38\u5e73\u6ed1\uff0c\u54cd\u5e94\u6162<\/td>\n<td style=\"text-align: left;\">\u50cf\u5728\u7cd6\u6d46\u91cc\u79fb\u52a8<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">0.3<\/td>\n<td style=\"text-align: left;\">\u5e73\u8861\uff08\u60a8\u7684\u503c\uff09<\/td>\n<td style=\"text-align: left;\">\u50cf\u5728\u6c34\u4e2d\u79fb\u52a8<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">0.5<\/td>\n<td style=\"text-align: left;\">\u4e2d\u7b49\u5e73\u6ed1<\/td>\n<td style=\"text-align: left;\">\u50cf\u5728\u7a7a\u6c14\u4e2d\u79fb\u52a8<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">0.7<\/td>\n<td style=\"text-align: left;\">\u6296\u52a8\u5927\uff0c\u54cd\u5e94\u5feb<\/td>\n<td style=\"text-align: left;\">\u51e0\u4e4e\u6ca1\u6709\u6ee4\u6ce2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"5_%E5%9C%A8%E9%9F%B3%E9%A2%91%E5%A4%84%E7%90%86%E4%B8%AD%E7%9A%84%E5%BA%94%E7%94%A8\"><\/span>5. <strong>\u5728\u97f3\u9891\u5904\u7406\u4e2d\u7684\u5e94\u7528<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">\u573a\u666f<\/th>\n<th style=\"text-align: left;\">\u4f4e\u901a\u6ee4\u6ce2\u7684\u4f5c\u7528<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\">\u60a8\u7684\u706f\u5149<\/td>\n<td style=\"text-align: left;\">\u8ba9\u4eae\u5ea6\u53d8\u5316\u5e73\u6ed1\uff0c\u4e0d\u523a\u773c\u95ea\u70c1<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">\u97f3\u9891\u964d\u566a<\/td>\n<td style=\"text-align: left;\">\u8fc7\u6ee4\u9ea6\u514b\u98ce\u7684\u73af\u5883\u566a\u97f3<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">\u5e73\u6ed1\u97f3\u91cf<\/td>\n<td style=\"text-align: left;\">\u907f\u514d\u97f3\u91cf\u7a81\u7136\u66b4\u589e<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\">\u89e6\u6478\u54cd\u5e94<\/td>\n<td style=\"text-align: left;\">\u8ba9\u6ed1\u52a8\u66f4\u987a\u6ed1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"6_%E4%B8%80%E5%8F%A5%E8%AF%9D%E6%80%BB%E7%BB%93\"><\/span>6. <strong>\u4e00\u53e5\u8bdd\u603b\u7ed3<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>\u4f4e\u901a\u6ee4\u6ce2 = \u7ed9\u4fe1\u53f7\u52a0\u4e0a\u201c\u60ef\u6027\u201d\uff0c\u8ba9\u5b83\u4e0d\u80fd\u5267\u70c8\u8df3\u52a8\uff0c\u53ea\u80fd\u5e73\u7f13\u53d8\u5316\u3002<\/strong><\/p>\n<p>\u5c31\u50cf\u5f00\u8f66\uff1a<\/p>\n<ul>\n<li>\u9ad8\u9891 = \u6025\u5239\u8f66\u3001\u6025\u52a0\u901f\uff08\u4e0d\u8212\u670d\uff09<\/li>\n<li>\u4f4e\u901a\u6ee4\u6ce2 = \u5e73\u7a33\u52a0\u901f\u3001\u51cf\u901f\uff08\u8212\u9002\uff09<\/li>\n<\/ul>\n<p>\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u52a0\u4e86\u5e73\u6ed1\u540e\uff0c\u60a8\u7684\u706f\u5149\u770b\u8d77\u6765\u81ea\u7136\u8212\u670d\uff0c\u4e0d\u4f1a\u50cf\u8fea\u65af\u79d1\u706f\u90a3\u6837\u523a\u773c\uff01<\/p>\n<button class=\"simplefavorite-button\" data-postid=\"16271\" data-siteid=\"1\" data-groupid=\"1\" data-favoritecount=\"0\" style=\"\">\u6536\u85cf <i class=\"sf-icon-star-empty\"><\/i><\/button>","protected":false},"excerpt":{"rendered":"<p>\u76ee\u5f55 \u4f4e\u901a\u6ee4\u6ce2\u7b97\u6cd5\u901a\u4fd7\u89e3\u91ca1. \u6700\u76f4\u89c2\u7684\u7406\u89e3\uff1a\u7b5b\u5b502. \u751f\u6d3b\u4e2d\u7684\u7c7b\u6bd4\u7c7b\u6bd41\uff1a\u6c7d\u8f66\u51cf\u9707\u56683. \u6570\u5b66\u539f\u7406 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1256],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/16271"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=16271"}],"version-history":[{"count":2,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/16271\/revisions"}],"predecessor-version":[{"id":16273,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/16271\/revisions\/16273"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16271"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}