{"id":15684,"date":"2023-10-02T06:17:03","date_gmt":"2023-10-01T22:17:03","guid":{"rendered":"\/\/www.viralrail.com\/?p=15684"},"modified":"2023-10-02T06:17:03","modified_gmt":"2023-10-01T22:17:03","slug":"txzydhdtmdqbssm","status":"publish","type":"post","link":"\/\/www.viralrail.com\/blog\/15684.html","title":{"rendered":"\u5929\u7ebf\u589e\u76cadb\u548cdbi\uff1a\u5b83\u4eec\u7684\u533a\u522b\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"

  \u5929\u7ebf\u589e\u76ca\u662f\u6307\u5929\u7ebf\u4f20\u8f93\u4fe1\u53f7\u7684\u80fd\u529b\uff0c\u5b83\u662f\u4e00\u79cd\u8861\u91cf\u5929\u7ebf\u7684\u6307\u6807\u3002db\u548cdbi\u662f\u4e24\u79cd\u5e38\u89c1\u7684\u8861\u91cf\u5929\u7ebf\u589e\u76ca\u7684\u65b9\u6cd5\uff0c\u5b83\u4eec\u4e4b\u95f4\u6709\u7740\u660e\u663e\u7684\u533a\u522b\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5b83\u4eec\u4e4b\u95f4\u7684\u5dee\u5f02\uff0c\u4ee5\u53ca\u5b83\u4eec\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n

db\uff1a\u4ec0\u4e48\u662f\u5b83\uff1f<\/h2>\n

  db\uff08\u5373dB\uff09\u662f\u6307\u201c\u5206\u8d1d\u201d\uff0c\u5b83\u662f\u4e00\u79cd\u8861\u91cf\u5929\u7ebf\u589e\u76ca\u7684\u6807\u51c6\u3002\u5b83\u662f\u7531\u5355\u4f4d\u201c\u5206\u8d1d\u201d\uff08dB\uff09\u6765\u8861\u91cf\uff0c\u5b83\u662f\u4e00\u4e2a\u6bd4\u503c\uff0c\u8861\u91cf\u7684\u662f\u4e24\u4e2a\u4fe1\u53f7\u4e4b\u95f4\u7684\u5927\u5c0f\u3002\u5177\u4f53\u6765\u8bf4\uff0cdb\u662f\u6307\u4e00\u4e2a\u4fe1\u53f7\u589e\u76ca\u7684\u5927\u5c0f\uff0c\u5b83\u662f\u6307\u4e00\u4e2a\u4fe1\u53f7\u5f3a\u5ea6\u7684\u589e\u76ca\uff0c\u8868\u793a\u4e3a\u6bd4\u503c\uff0c\u800c\u4e0d\u662f\u7edd\u5bf9\u503c\u3002<\/p>\n

  db\u7684\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1a
db = 10log10<\/sub>(P2<\/sub>\/P1<\/sub>) <\/p>\n

  \u5176\u4e2d\uff0cP1<\/sub>\u548cP2<\/sub>\u5206\u522b\u8868\u793a\u4fe1\u53f7\u5f3a\u5ea6\u7684\u8f93\u5165\u548c\u8f93\u51fa\u3002<\/p>\n

dbi\uff1a\u4ec0\u4e48\u662f\u5b83\uff1f<\/h2>\n

  dbi\u662f\u6307\u201c\u5206\u8d1d\u589e\u76ca\u201d\uff0c\u5b83\u662f\u4e00\u79cd\u8861\u91cf\u5929\u7ebf\u589e\u76ca\u7684\u6807\u51c6\u3002\u5b83\u662f\u7531\u5355\u4f4d\u201c\u5206\u8d1d\u201d\uff08dB\uff09\u8861\u91cf\uff0c\u5b83\u662f\u4e00\u4e2a\u6bd4\u503c\uff0c\u8861\u91cf\u7684\u662f\u4e00\u4e2a\u5929\u7ebf\u4f20\u8f93\u4fe1\u53f7\u7684\u80fd\u529b\u3002\u5177\u4f53\u6765\u8bf4\uff0cdbi\u662f\u6307\u4e00\u4e2a\u5929\u7ebf\u4f20\u8f93\u4fe1\u53f7\u7684\u80fd\u529b\uff0c\u5b83\u662f\u6307\u4e00\u4e2a\u5929\u7ebf\u80fd\u591f\u4f20\u8f93\u4fe1\u53f7\u7684\u589e\u76ca\uff0c\u8868\u793a\u4e3a\u6bd4\u503c\uff0c\u800c\u4e0d\u662f\u7edd\u5bf9\u503c\u3002<\/p>\n

  dbi\u7684\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1a
dbi = 10log10<\/sub>(G2<\/sub>\/G1<\/sub>) <\/p>\n

  \u5176\u4e2d\uff0cG1<\/sub>\u548cG2<\/sub>\u5206\u522b\u8868\u793a\u5929\u7ebf\u589e\u76ca\u7684\u8f93\u5165\u548c\u8f93\u51fa\u3002<\/p>\n

db\u548cdbi\u7684\u533a\u522b\uff1a<\/h2>\n

1. \u8ba1\u7b97\u516c\u5f0f\u4e0d\u540c<\/h3>\n

  db\u548cdbi\u7684\u8ba1\u7b97\u516c\u5f0f\u4e0d\u540c\uff0cdb\u662f\u6307\u4fe1\u53f7\u5f3a\u5ea6\u7684\u589e\u76ca\uff0c\u800cdbi\u662f\u6307\u5929\u7ebf\u4f20\u8f93\u4fe1\u53f7\u7684\u80fd\u529b\u3002<\/p>\n

2. \u5e94\u7528\u573a\u666f\u4e0d\u540c<\/h3>\n

  db\u548cdbi\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u6709\u7740\u660e\u663e\u7684\u533a\u522b\uff0cdb\u901a\u5e38\u7528\u4e8e\u8861\u91cf\u4fe1\u53f7\u5f3a\u5ea6\u7684\u589e\u76ca\uff0c\u800cdbi\u5219\u7528\u4e8e\u8861\u91cf\u5929\u7ebf\u4f20\u8f93\u4fe1\u53f7\u7684\u80fd\u529b\u3002<\/p>\n

3. \u8861\u91cf\u6307\u6807\u4e0d\u540c<\/h3>\n

  db\u548cdbi\u5728\u8861\u91cf\u6307\u6807\u4e0a\u4e5f\u6709\u7740\u660e\u663e\u7684\u533a\u522b\uff0cdb\u662f\u6307\u4fe1\u53f7\u5f3a\u5ea6\u7684\u589e\u76ca\uff0c\u800cdbi\u662f\u6307\u5929\u7ebf\u4f20\u8f93\u4fe1\u53f7\u7684\u80fd\u529b\u3002<\/p>\n

\u7ed3\u8bba<\/h2>\n

  \u4ece\u4e0a\u8ff0\u4ecb\u7ecd\u53ef\u4ee5\u770b\u51fa\uff0cdb\u548cdbi\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u6709\u7740\u660e\u663e\u7684\u533a\u522b\uff0c\u5b83\u4eec\u4e4b\u95f4\u7684\u5dee\u5f02\u5728\u4e8e\u8ba1\u7b97\u516c\u5f0f\u3001\u5e94\u7528\u573a\u666f\u548c\u8861\u91cf\u6307\u6807\u3002<\/strong>\u5b83\u4eec\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u90fd\u662f\u975e\u5e38\u91cd\u8981\u7684\u6307\u6807\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u51c6\u786e\u8861\u91cf\u5929\u7ebf\u4f20\u8f93\u4fe1\u53f7\u7684\u80fd\u529b\uff0c\u4ece\u800c\u66f4\u597d\u5730\u6ee1\u8db3\u6211\u4eec\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5929\u7ebf\u589e\u76ca\u662f\u6307\u5929\u7ebf\u4f20\u8f93\u4fe1\u53f7\u7684\u80fd\u529b\uff0c\u5b83\u662f\u4e00\u79cd\u8861\u91cf\u5929\u7ebf\u7684\u6307\u6807\u3002db\u548cdbi\u662f\u4e24\u79cd\u5e38\u89c1\u7684\u8861\u91cf\u5929\u7ebf\u589e\u76ca\u7684\u65b9\u6cd5\uff0c\u5b83\u4eec\u4e4b\u95f4\u6709\u7740\u660e\u663e\u7684\u533a\u522b\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5b83\u4eec\u4e4b\u95f4\u7684\u5dee\u5f02\uff0c\u4ee5\u53ca\u5b83\u4eec\u5728\u5b9e\u9645\u5e94<\/p>\n","protected":false},"author":1,"featured_media":3671,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[36],"tags":[223],"class_list":["post-15684","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-txzy"],"_links":{"self":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/posts\/15684"}],"collection":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/comments?post=15684"}],"version-history":[{"count":0,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/posts\/15684\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/media\/3671"}],"wp:attachment":[{"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/media?parent=15684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/categories?post=15684"},{"taxonomy":"post_tag","embeddable":true,"href":"\/\/www.viralrail.com\/wp-json\/wp\/v2\/tags?post=15684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}