{"id":266,"date":"2020-11-20T16:23:38","date_gmt":"2020-11-20T08:23:38","guid":{"rendered":"https:\/\/blog.simbot.net\/?p=266"},"modified":"2022-03-02T09:03:31","modified_gmt":"2022-03-02T01:03:31","slug":"n-dim-angle","status":"publish","type":"post","link":"https:\/\/blog.simbot.net\/2020\/11\/20\/n-dim-angle\/","title":{"rendered":"\u591a\u7ef4\u7a7a\u95f4\u5750\u6807\u7cfb\u4e2d\u7684\u5e73\u5206\u7ebf\u5939\u89d2"},"content":{"rendered":"\n<p>\u4f5c\u8005\uff1ahws000\uff08hws.000#163.com\uff09<br \/>\u58f0\u660e\uff1a\u7248\u6743\u6240\u6709\uff0c\u8f6c\u8f7d\u8bf7\u8054\u7cfb\u4f5c\u8005\u3002<br \/>\u51fa\u5904\uff1a<a href=\"https:\/\/blog.simbot.net\/index.php\/2020\/11\/20\/n-dim-angle\/\">https:\/\/blog.simbot.net\/index.php\/2020\/11\/20\/n-dim-angle\/<\/a><\/p>\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u4e8c\u7ef4\u76f4\u89d2\u5750\u6807\u7cfb\u4e2d\uff0c\u89d2\u5e73\u5206\u7ebf\u4e0ex\u8f74\u3001y\u8f74\u7684\u5939\u89d2\u4e3a45\u00b0\u3002\u73b0\u6709\u539f\u70b9o\uff0c\u5e73\u5206\u7ebf\u4e0a\u7684\u70b9r\uff081\uff0c1\uff09\uff0cx\u8f74\u4e0a\u7684\u70b9a\uff081\uff0c0\uff09\uff0c\u2220roa\u7528\u03b8\u8868\u793a\uff0c\u2220rao\u662f90\u00b0\u3002\u6839\u636e\u4f59\u5f26\u7684\u5b9a\u4e49\uff0ccos\u03b8=\u90bb\u8fb9\/\u659c\u8fb9\uff0c\u90bb\u8fb9\u957f\u5ea6\u662f1\uff0c\u659c\u8fb9\u662f\u221a2\uff0c\u56e0\u6b64cos\u03b8\u7b49\u4e8e0.7071\uff0c\u03b8\u7b49\u4e8e45\u00b0\u3002\u5728n\u7ef4\u7a7a\u95f4\u4e2d\uff0cr\u5750\u6807\u4e3a\uff081\uff0c&#8230;\uff0c1\uff09\uff0c\u659c\u8fb9\u957f\u5ea6\u221an\uff0c\u4efb\u610f\u5750\u6807\u8f74\u4e0a\u7684\u70b9a\uff080\uff0c&#8230;\uff0c1\uff0c&#8230;\uff0c0\uff09\uff0c\u90bb\u8fb9\u957f\u4e3a1\uff0ccos\u03b8\u7b49\u4e8e1\/\u221an\u3002\u5f53n\u7b49\u4e8e3\u30014\u30018&#8230;\u65f6\uff0c\u03b8\u7684\u503c\u5982\u4e0b\uff0cn\u8d8a\u5927\uff0c\u03b8\u8d8a\u63a5\u8fd190\u00b0\uff1a<\/p>\n<table style=\"border-collapse: collapse; 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width: 10%;\">3<\/td>\n<td style=\"height: 23px; width: 10%;\">4<\/td>\n<td style=\"height: 23px; width: 10%;\">8<\/td>\n<td style=\"height: 23px; width: 10%;\">16<\/td>\n<td style=\"height: 23px; width: 10%;\">32<\/td>\n<td style=\"height: 23px; width: 10%;\">64<\/td>\n<td style=\"height: 23px; width: 10%;\">128<\/td>\n<td style=\"height: 23px; width: 10%;\">256<\/td>\n<td style=\"height: 23px; width: 10%;\">512<\/td>\n<\/tr>\n<tr style=\"height: 25px;\">\n<td style=\"height: 25px; width: 10%;\">\u03b8<sub>1<\/sub><\/td>\n<td style=\"height: 25px; width: 10%;\">70.5<\/td>\n<td style=\"height: 25px; width: 10%;\">60<\/td>\n<td style=\"height: 25px; width: 10%;\">41.4<\/td>\n<td style=\"height: 25px; width: 10%;\">29<\/td>\n<td style=\"height: 25px; width: 10%;\">20.4<\/td>\n<td style=\"height: 25px; width: 10%;\">14.4<\/td>\n<td style=\"height: 25px; width: 10%;\">10.1<\/td>\n<td style=\"height: 25px; width: 10%;\">7.2<\/td>\n<td style=\"height: 25px; width: 10%;\">5.1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u00a0 \u00a0 \u00a0 \u5f53r<sub>k<\/sub> \u843d\u5728k\u4e2a\u5750\u6807\u8f74\u7684\u503c\u5747\u4e3a-1\u65f6\uff0crr<sub>k<\/sub> \u957f\u5ea6\u4e3a2\u221ak\uff0ccos\u03b8<sub>k<\/sub> =\uff08n-2k\uff09\/n\u3002\u9009\u53d6n\u7684\u5178\u578b\u503c\u4e3a128\uff0c\u03b8<sub>k<\/sub> \u7684\u503c\u5982\u4e0b\uff1a<\/p>\n<table style=\"border-collapse: collapse; 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