{"id":584,"date":"2006-08-30T05:00:00","date_gmt":"2006-08-29T21:00:00","guid":{"rendered":"http:\/\/www.weather.org.hk\/blog\/?p=584"},"modified":"2010-11-11T18:24:37","modified_gmt":"2010-11-11T10:24:37","slug":"%e9%99%a3%e9%a2%a8%e8%88%87%e5%b9%b3%e5%9d%87%e9%a2%a8%e9%80%9f%e7%9a%84%e9%97%9c%e4%bf%82","status":"publish","type":"post","link":"https:\/\/www.weather.org.hk\/news\/%e9%99%a3%e9%a2%a8%e8%88%87%e5%b9%b3%e5%9d%87%e9%a2%a8%e9%80%9f%e7%9a%84%e9%97%9c%e4%bf%82\/","title":{"rendered":"\u9663\u98a8\u8207\u5e73\u5747\u98a8\u901f\u7684\u95dc\u4fc2"},"content":{"rendered":"

\t\t\t\t\t\t\t\t\t<\/p>\n

\u71b1\u5e36\u6c23\u65cb\u3001\u96f7\u66b4\u6216\u5b63\u5019\u98a8\u5f71\u97ff\u9999\u6e2f\u6642\uff0c\u9999\u6e2f\u5e38\u51fa\u73fe\u9663\u98a8\uff0c\u5439\u7ffb\u8ca8\u6ac3\u3001\u5439\u584c\u5927\u6a39\u3001\u5439\u5012\u9014\u4eba\u3002\u9663\u98a8\u8207\u5e73\u5747\u98a8\u901f\u6709\u95dc\u4fc2\u55ce\uff1f\u9663\u98a8\u7684\u98a8\u529b\u53ef\u4ee5\u9810\u6e2c\u55ce\uff1f<\/p>\n

\u9663\u98a8\u8207\u5e73\u5747\u98a8\u901f\u6c92\u6709\u7c21\u55ae\u7684\u95dc\u4fc2\uff0c\u4f46\u4e26\u975e\u5b8c\u5168\u7121\u95dc\u3002\u6211\u5011\u628a\u9663\u98a8\u8207\u5e73\u5747\u98a8\u901f\u7684\u6bd4\u754c\u5b9a\u70ba\u9663\u98a8\u7cfb\u6578\uff08gust factor\uff09\uff1a<\/p>\n

GF = G \/ U.................(1)<\/p>\n

\u5176\u4e2d G \u70ba\u9663\u98a8\uff0cU\u70ba\u5e73\u5747\u98a8\u901f\uff0cGF\u70ba\u9663\u98a8\u7cfb\u6578\u3002<\/p>\n

\u9663\u98a8\u7cfb\u6578\u53d7\u5730\u5f62\u5f71\u97ff\u3002\u7a7a\u66e0\u5730\u65b9\u78e8\u64e6\u529b\u8f03\u5c0f\uff0c\u9663\u98a8\u7cfb\u6578\u8f03\u5c0f\u3002\u6d77\u6d0b\u7684\u9663\u98a8\u7cfb\u6578\u7d04\u70ba 1.3\uff0c\u5927\u57ce\u5e02\u53ef\u9054 2.3\u3002<\/p>\n

\u6211\u5011\u9032\u4e00\u6b65\u5047\u8a2d\u9663\u98a8\u8207\u5e73\u5747\u98a8\u529b\u5448\u7dda\u6027\u95dc\u4fc2\uff1a<\/p>\n

G = a U + b.................(2)<\/p>\n

\u5176\u4e2d G\u00a0\u70ba\u9663\u98a8\uff0cU\u00a0\u70ba\u5e73\u5747\u98a8\u901f\uff0ca \u53ca b \u70ba\u5e38\u6578\u3002<\/p>\n

\u5229\u7528(2)\uff0c(1)\u53ef\u6539\u5beb\u70ba GF = a + b \/ U<\/p>\n

\u5929\u6587\u53f0\u7814\u7a76 [1] \u986f\u793a\uff0c\u5728\u71b1\u5e36\u6c23\u65cb\u3001\u5b63\u5019\u98a8\u53ca\u96f7\u66b4\u5f71\u97ff\u9999\u6e2f\u6642\uff0c\u9663\u98a8\u8207\u5e73\u5747\u98a8\u901f\u5448\u9817\u5f37\u7684\u7dda\u6027\u95dc\u4fc2\u3002\u4ee5\u76f8\u95dc\u7cfb\u6578\uff08correlation coefficient\uff0c-1<=r<=1\uff09\u8868\u793a\u7dda\u6027\u95dc\u4fc2\u7684\u5f37\u5f31\u6642\uff0c\u71b1\u5e36\u6c23\u65cb\u3001\u5b63\u5019\u98a8\u53ca\u96f7\u66b4\u5f71\u97ff\u4e0b\u9663\u98a8\u8207\u5e73\u5747\u98a8\u529b\u7684\u76f8\u95dc\u7cfb\u6578\u5206\u5225\u70ba 0.93\u30010.88\u53ca0.85\u3002<\/p>\n

\u4ee5\u500b\u5225\u5730\u5340\u70ba\u4f8b\uff0c\u6a6b\u703e\u5cf6\u3001\u9577\u6d32\u3001\u8d64\u9c72\u89d2\u5728\u71b1\u5e36\u6c23\u65cb\u5f71\u97ff\u4e0b\u7684\u516c\u5f0f\u70ba\uff1a<\/p>\n

G = 1.25 U + 0.07\uff0cr =\u00a00.98
G = 1.35 U + 0.96\uff0cr =\u00a00.96
G = 1.45 U - 0.69\uff0cr =\u00a00.97<\/p>\n

\u4ee5\u4e0a\u516c\u5f0f\u7684\u55ae\u4f4d\u70ba\u7c73\/\u79d2\uff0c1\u7c73\/\u79d2=3.6\u516c\u91cc\/\u5c0f\u6642\u3002\u00a0\u63db\u53e5\u8a71\u8aaa\uff0c\u6211\u5011\u53ef\u4ee5\u5229\u7528\u5e73\u5747\u98a8\u901f\u9810\u6e2c\u53ef\u80fd\u51fa\u73fe\u7684\u6700\u5927\u9663\u98a8\u3002<\/p>\n

\u9663\u98a8\u96d6\u7136\u77ed\u66ab\uff0c\u4f46\u7531\u65bc\u6bd4\u5e73\u5747\u98a8\u901f\u9ad8\u51fa30-100%\u4ee5\u4e0a\u800c\u4e14\u9632\u4e0d\u52dd\u9632\uff0c\u56e0\u6b64\u5bb9\u6613\u9020\u6210\u610f\u5916\u3002\u6642\u901f 70 \u516c\u91cc\u7684\u9663\u98a8\u5df2\u80fd\u628a\u4eba\u5439\u5012\u3002\u56e0\u6b64\u4e86\u89e3\u9663\u98a8\u8207\u5e73\u5747\u98a8\u901f\u7684\u95dc\u4fc2\uff0c\u5c0d\u63a1\u53d6\u9810\u9632\u63aa\u65bd\u4ea6\u6709\u5e6b\u52a9\u3002<\/p>\n

\u53c3\u8003\u8cc7\u6599\uff1a
[1] \u6797\u975c\u829d\u3001\u6797\u913a\u6cd7\u84ee\uff0c2006\uff1a\u8207\u96f7\u66b4\u3001\u71b1\u5e36\u6c23\u65cb\u53ca\u5b63\u5019\u98a8\u76f8\u95dc\u7684\u5f37\u9663\u98a8\u5206\u6790<\/a>\uff0c\u7b2c\u4e8c\u5341\u5c46\u7cb5\u6e2f\u6fb3\u6c23\u8c61\u79d1\u6280\u7814\u8a0e\u6703\uff0c\u4e2d\u570b\uff0c\u6fb3\u9580\uff0c2006 \u5e74 1 \u670818-20 \u65e5\u3002<\/p>\n

<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"

熱帶氣旋、雷暴或季候風影響香港時，香港常出現陣風，吹翻貨櫃、吹塌大樹、吹倒途人。陣風與平均風速有關係嗎？陣風的風力可以預測嗎？ 陣風與平均風速沒有簡單的關係，但並非完全無關。我們把陣風與平均風速的比界定為陣風系數（gust factor）： GF = G \/ U……………..(1) 其中 G 為陣風，U為平均風速，GF為陣風系數。 陣風系數受地形影響。空曠地方磨擦力較小，陣風系數較小。海洋的陣風系數約為 1.3，大城市可達 2.3。 我們進一步假設陣風與平均風力呈線性關係： G = a U + b……………..(2) 其中 G 為陣風，U 為平均風速，a 及 b 為常數。 利用(2)，(1)可改寫為 GF = a…<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[4],"tags":[],"class_list":["post-584","post","type-post","status-publish","format-standard","hentry","category-4"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/posts\/584","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/comments?post=584"}],"version-history":[{"count":1,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/posts\/584\/revisions"}],"predecessor-version":[{"id":735,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/posts\/584\/revisions\/735"}],"wp:attachment":[{"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/media?parent=584"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/categories?post=584"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.weather.org.hk\/news\/wp-json\/wp\/v2\/tags?post=584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}