{"id":1337,"date":"2022-07-04T15:09:30","date_gmt":"2022-07-04T07:09:30","guid":{"rendered":"http:\/\/www.7mgh.com\/?p=1337"},"modified":"2023-01-13T16:53:31","modified_gmt":"2023-01-13T08:53:31","slug":"%e7%94%b5%e9%98%bb%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/www.7mgh.com\/?p=1337","title":{"rendered":"\u7535\u963b\u95ee\u9898"},"content":{"rendered":"\n<p>\u6b63\u65b9\u5f62\u8584\u7247\u7535\u963b\u5982\u56fe\u6240\u793a\u63a5\u5728\u7535\u8def\u4e2d\uff0c\u7535\u8def\u4e2d\u7535\u6d41\u4e3aI\uff0c\u82e5\u5728\u8be5\u7535\u963b\u7247\u4e2d\u6316\u53bb\u4e00\u5c0f\u6b63\u65b9\u5f62\uff0c\u6316\u53bb\u7684\u6b63\u65b9\u5f62\u8fb9\u957f\u4e3a\u539f\u7535\u963b\u7247\u8fb9\u957f\u7684\u4e09\u5206\u4e4b\u4e00\uff0c\u7136\u540e\u5c06\u5e26\u6709\u6b63\u65b9\u5f62\u5c0f\u5b54\u7684\u7535\u963b\u7247\u63a5\u5728\u540c\u4e00\u7535\u6e90\u4e0a\uff0c\u4fdd\u6301\u7535\u963b\u7247\u4e24\u7aef\u7535\u538b\u4e0d\u53d8\uff0c\u7535\u8def\u4e2d\u7684\u7535\u6d41\u53d8\u4e3a\u591a\u5c11\uff1f<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681.png\" alt=\"\" class=\"wp-image-1338\" width=\"408\" height=\"179\" srcset=\"https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681.png 706w, https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-300x132.png 300w, https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-600x263.png 600w\" sizes=\"(max-width: 408px) 100vw, 408px\" \/><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code><strong>\u89e3\u6cd51\u3001<\/strong>\u505a\u7269\u7406\u5e38\u5e38\u9700\u8981\u6784\u578b\uff0c\u6211\u4eec\u53ea\u9700\u8981\u51e0\u4f55\u5f62\u72b6\u628a\u4ed6\u770b\u6210\u4e00\u4e2a\u4e2a\u76f8\u7b49\u7684\u7535\u963b\u62fc\u5408\u5373\u53ef\u3002<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-1.png\" alt=\"\" class=\"wp-image-1341\" width=\"417\" height=\"183\" srcset=\"https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-1.png 706w, https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-1-300x132.png 300w, https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-1-600x263.png 600w\" sizes=\"(max-width: 417px) 100vw, 417px\" \/><figcaption class=\"wp-element-caption\">\u8bbe\u6bcf\u5c0f\u5757\u7684\u7535\u963b\u4e3aR\uff0c\u5219\u8584\u7247\u603b\u7535\u963b\u662f3\u4e2a3R\u7535\u963b\u7684\u5e76\u8054\u503c\uff0c\u5176\u503cR<\/figcaption><\/figure>\n\n\n\n<p>$${1\\over R_1}={1 \\over 3R} +{1 \\over 3R}+{1 \\over 3R}= {1\\over R} $$<\/p>\n\n\n\n<p>$$R_1=R$$<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-2.png\" alt=\"\" class=\"wp-image-1342\" width=\"422\" height=\"185\" srcset=\"https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-2.png 706w, https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-2-300x132.png 300w, https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-2-600x263.png 600w\" sizes=\"(max-width: 422px) 100vw, 422px\" \/><\/figure>\n\n\n\n<p>\u6b64\u65f6\u8584\u7247\u76f8\u5f53\u4e8e\u4e09\u4e2aR\u7684\u7535\u963b\u5e76\u8054\u3001\u4e24\u4e2aR\u7535\u963b\u5e76\u8054\u540e\u518d\u4e32\u8054\uff0c\u4e09\u4e2aR\u7684\u7535\u963b\u5e76\u8054\u540e\u7684\u603b\u7535\u963b\u4e3aR\/3\u3001\u4e24\u4e2aR\u7535\u963b\u5e76\u8054\u540e\u603b\u7535\u963b\u4e3aR\/2\uff0c\u5219\u6b64\u65f6\u7684\u603b\u7535\u963b.<\/p>\n\n\n\n<p>$$ R_2 = {R \\over 3} + {R \\over 2} + {R \\over 3} = {7R \\over 6} $$<\/p>\n\n\n\n<p>\u56e0\u6b63\u65b9\u5f62\u8584\u7535\u963b\u7247\u63a5\u5728\u7535\u8def\u4e2d\uff0c\u7535\u8def\u4e2d\u7535\u6d41\u4e3aI\uff0c\u4fdd\u6301\u4e24\u7aef\u7535\u538b\u4e0d\u53d8\uff0cU=IR<\/p>\n\n\n\n<p>$$U = IR={I_2}{R_2}={I_2} {7R \\over 6}$$<\/p>\n\n\n\n<p>$$ I_2 = {6 \\over7} {I} $$<\/p>\n\n\n\n<p><strong>\u89e3\u6cd52<\/strong>\u3001\u5f53\u7136\u8fd9\u4e2a\u9898\u76ee\u8fd8\u6709\u4e00\u79cd\u63a5\u6cd5\uff0c\u5c31\u662f\u6309\u7167\u9ad8\u4e2d\u7684\u516c\u5f0f\uff0c\u7136\u540e\u62bd\u8c61\u753b\u56fe\u5f62\u5373\u53ef\u3002  $$ R= \\rho  \\frac {L}{S} $$<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88682.png\" alt=\"\" class=\"wp-image-1422\" width=\"242\" height=\"218\" srcset=\"https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88682.png 871w, https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88682-300x270.png 300w, https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88682-768x691.png 768w, https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88682-600x540.png 600w\" sizes=\"(max-width: 242px) 100vw, 242px\" \/><\/figure>\n\n\n\n<p>$$ R_1 =\\rho \\frac{3a}{9a^2}=\\rho \\frac{1}{3a} $$<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-3.png\" alt=\"\" class=\"wp-image-1425\" width=\"249\" height=\"224\" srcset=\"https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-3.png 871w, https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-3-300x270.png 300w, https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-3-768x691.png 768w, https:\/\/www.7mgh.com\/wp-content\/uploads\/2022\/07\/\u56fe\u88681-3-600x540.png 600w\" sizes=\"(max-width: 249px) 100vw, 249px\" \/><figcaption class=\"wp-element-caption\">\u53ef\u4ee5\u770b\u6210\u4e09\u4e2a\u957f\u5ea6\u4e3aa\u7684\u7535\u963b\u4e32\u8054<\/figcaption><\/figure>\n\n\n\n<p>$$ R_2 = \\rho \\frac {a}{9a^2} +\\frac {a}{6a^2} + \\frac {a}{9a^2} =\\rho \\frac {7}{18a} $$<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6b63\u65b9\u5f62\u8584\u7247\u7535\u963b\u5982\u56fe\u6240\u793a\u63a5\u5728\u7535\u8def\u4e2d\uff0c\u7535\u8def\u4e2d\u7535\u6d41\u4e3aI\uff0c\u82e5\u5728\u8be5\u7535\u963b\u7247\u4e2d\u6316\u53bb\u4e00\u5c0f\u6b63\u65b9\u5f62\uff0c\u6316\u53bb\u7684\u6b63\u65b9\u5f62\u8fb9\u957f\u4e3a\u539f\u7535\u963b\u7247\u8fb9\u957f\u7684\u4e09\u5206\u4e4b\u4e00\uff0c\u7136\u540e\u5c06\u5e26\u6709\u6b63\u65b9\u5f62\u5c0f\u5b54\u7684\u7535\u963b\u7247\u63a5\u5728\u540c\u4e00\u7535\u6e90\u4e0a\uff0c\u4fdd\u6301\u7535\u963b\u7247\u4e24\u7aef\u7535\u538b\u4e0d\u53d8\uff0c\u7535\u8def\u4e2d\u7684\u7535\u6d41\u53d8\u4e3a\u591a\u5c11\uff1f $${1\\over R_1}={1 \\over 3R} +{1 \\over 3R}+{1 \\over 3R}= {1\\over R} $$ $$R_1=R$$ \u6b64\u65f6\u8584\u7247\u76f8\u5f53\u4e8e\u4e09\u4e2aR\u7684\u7535\u963b\u5e76\u8054\u3001\u4e24\u4e2aR\u7535\u963b\u5e76\u8054\u540e\u518d\u4e32\u8054\uff0c\u4e09\u4e2aR\u7684\u7535\u963b\u5e76\u8054\u540e\u7684\u603b\u7535\u963b\u4e3aR\/3\u3001\u4e24\u4e2aR\u7535\u963b\u5e76\u8054\u540e\u603b\u7535\u963b\u4e3aR\/2\uff0c\u5219\u6b64\u65f6\u7684\u603b\u7535\u963b. $$ R_2 = {R \\over 3} [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1338,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","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":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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