{"id":21114,"date":"2015-04-21T00:38:11","date_gmt":"2015-04-20T16:38:11","guid":{"rendered":"https:\/\/case.ntu.edu.tw\/blog\/?p=21114"},"modified":"2018-08-01T15:36:28","modified_gmt":"2018-08-01T07:36:28","slug":"%e3%80%90%e7%a7%91%e6%8a%80%e6%87%89%e7%94%a8%e3%80%91%e7%94%a8gps%e4%be%86%e6%89%be%e9%bb%91%e6%9a%97%e7%89%a9%e8%b3%aa","status":"publish","type":"post","link":"https:\/\/case.ntu.edu.tw\/blog\/?p=21114","title":{"rendered":"\u3010\u79d1\u6280\u61c9\u7528\u3011\u7528GPS\u4f86\u627e\u6697\u7269\u8cea"},"content":{"rendered":"<p><span style=\"color: #333399;\"><strong>\u25a0\u5168\u7403\u5b9a\u4f4d\u7cfb\u7d71(GPS)\u4e0d\u53ea\u53ef\u4ee5\u7528\u4f86\u5e6b\u6211\u5011\u627e\u8def\uff0c\u544a\u8a34\u6211\u5011\u76ee\u524d\u7684\u4f4d\u7f6e\uff0c\u751a\u81f3\u6709\u53ef\u80fd\u4f86\u5e6b\u52a9\u6211\u5011\u5c0b\u627e\u6697\u7269\u8cea(dark matter)\u3002<\/strong><\/span><\/p>\n<figure id=\"attachment_21115\" aria-describedby=\"caption-attachment-21115\" style=\"width: 400px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/case.ntu.edu.tw\/blog\/wp-content\/uploads\/2015\/03\/1-hidinginplai.jpg\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-21115\" src=\"http:\/\/case.ntu.edu.tw\/blog\/wp-content\/uploads\/2015\/03\/1-hidinginplai.jpg\" alt=\"This two-clocks-illustration shows the pattern of how two atomic clocks would desynchronize and then resynchronize due to a lump of dark matter sweeping through a Global Positioning System or other atomic clock based network. Credit: Andrei Derevianko, University of Nevada, Reno. Read more at: http:\/\/phys.org\/news\/2014-11-elusive-dark-gps-satellites.html#jCp\" width=\"400\" height=\"291\" srcset=\"https:\/\/case.ntu.edu.tw\/blog\/wp-content\/uploads\/2015\/03\/1-hidinginplai.jpg 500w, https:\/\/case.ntu.edu.tw\/blog\/wp-content\/uploads\/2015\/03\/1-hidinginplai-300x218.jpg 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><figcaption id=\"caption-attachment-21115\" class=\"wp-caption-text\">Credit: Andrei Derevianko, University of Nevada, Reno.<\/figcaption><\/figure>\n<p><strong>\u64b0\u6587\uff5c<\/strong>\u9673\u52c1\u8c6a<\/p>\n<p>\u6839\u64da\u5929\u6587\u5b78\u5bb6\u7684\u4f30\u8a08\uff0c\u5982\u679c\u628a\u5168\u5b87\u5b99\u7684\u8cea\u91cf\u8ddf\u80fd\u91cf\u5408\u8a08\uff0c\u6211\u5011\u7528\u671b\u9060\u93e1\u89c0\u5bdf\u5230\u7684\u6240\u6709\u7269\u8cea\u5927\u7d04\u5360\u5168\u90e8\u76844.9%\uff0c\u800c\u6697\u7269\u8cea\u5927\u7d04\u536026.8%\uff0c\u53e6\u591668.3%\u5247\u662f\u5c6c\u65bc\u6697\u80fd\u91cf(dark energy)\u3002<\/p>\n<p>\u4e8b\u5be6\u4e0a\uff0c\u6697\u7269\u8cea\u662f\u7a2e\u5047\u60f3\u7684\u7269\u8cea\u578b\u614b\uff0c\u56e0\u70ba\u6839\u64da\u76ee\u524d\u7684\u7406\u8ad6\uff0c\u6211\u5011\u6839\u672c\u4e0d\u77e5\u9053\u6697\u7269\u8cea\u662f\u4ec0\u9ebc\u3002\u5118\u7ba1\u5982\u6b64\uff0c\u81f3\u5c11\u79d1\u5b78\u5bb6\u53ef\u4ee5\u544a\u8a34\u6211\u5011\uff0c\u6697\u7269\u8cea\u6709\u4e9b\u4ec0\u9ebc\u7279\u6027\u3002\u9996\u5148\uff0c\u9019\u4e9b\u6697\u7269\u8cea\u56e0\u70ba\u4e0d\u8207\u96fb\u78c1\u529b\u4f5c\u7528\uff0c\u6240\u4ee5\u4e0d\u6703\u53cd\u5c04\u4efb\u4f55\u5149\u7dda\uff0c\u56e0\u6b64\u6c92\u6709\u8fa6\u6cd5\u88ab\u671b\u9060\u93e1\u76f4\u63a5\u89c0\u5bdf\u5230\u3002\u67d0\u7a2e\u7a0b\u5ea6\u800c\u8a00\uff0c\u9019\u4e5f\u662f\u5b83\u4e4b\u6240\u4ee5\u88ab\u7a31\u70ba\u6697\u7269\u8cea\u7684\u539f\u56e0\u3002\u7b2c\u4e8c\uff0c\u9019\u4e9b\u6697\u7269\u8cea\u4e5f\u4e0d\u6703\u662f\u4e00\u4e9b\u6211\u5011\u7528\u671b\u9060\u93e1\u770b\u4e0d\u5230\u7684\u661f\u969b\u5875\u57c3\u3002\u7684\u78ba\uff0c\u661f\u969b\u5875\u57c3\u4e5f\u662f\u4e0d\u6703\u767c\u5149\uff0c\u4f46\u662f\u6211\u5011\u53ef\u4ee5\u900f\u904e\u5206\u6790\u9019\u4e9b\u661f\u969b\u5875\u57c3\u7684\u5438\u6536\u5149\u8b5c\u4f86\u767c\u73fe\u4ed6\u5011\u7684\u5b58\u5728\u3002\u7b2c\u4e09\uff0c\u9019\u4e9b\u6697\u7269\u8cea\u4e5f\u4e0d\u6703\u662f\u4e00\u822c\u7684\u53cd\u7269\u8cea\u3002\u56e0\u70ba\u5982\u679c\u9019\u4e9b\u6697\u7269\u8cea\u7684\u78ba\u662f\u7531\u53cd\u7269\u8cea\u6240\u69cb\u6210\u7684\u8a71\uff0c\u90a3\u9ebc\u6211\u5011\u61c9\u8a72\u6703\u770b\u5230\u5f88\u591a\u56e0\u70ba\u6b63\u53cd\u7269\u8cea\u76f8\u4e92\u6e6e\u6ec5\u6240\u7522\u751f\u7684\u5927\u91cfX\u5149\u3002<!--more--><\/p>\n<p>\u7531\u65bc\u6c92\u6709\u8fa6\u6cd5\u63a8\u4f30\u6697\u7269\u8cea\u7684\u5f62\u5f0f\u53ca\u8cea\u91cf\uff0c\u7269\u7406\u5b78\u5bb6\u904b\u7528\u5404\u7a2e\u65b9\u6cd5\u9032\u884c\u5be6\u9a57\uff0c\u5e0c\u671b\u80fd\u5920\u767c\u73fe\u6697\u7269\u8cea\u7684\u8e64\u8de1\u3002\u5176\u4e2d\u4e00\u7a2e\u65b9\u6cd5\u662f\u5229\u7528\u7c92\u5b50\u5c0d\u649e\u6a5f\uff0c\u4f8b\u5982\u4f4d\u65bc\u745e\u58eb\u7684\u5927\u5f37\u5b50\u5c0d\u649e\u6a5f\uff0c\u5e0c\u671b\u5728\u9ad8\u80fd\u91cf\u7684\u8cea\u5b50\u5c0d\u649e\u4e2d\u80fd\u5920\u767c\u73fe\u6697\u7269\u8cea\u3002\u53e6\u5916\u4e00\u7a2e\u65b9\u6cd5\u662f\u5728\u5730\u5e95\u9032\u884c\u5be6\u9a57\uff0c\u5e0c\u671b\u80fd\u5920\u770b\u5230\u6697\u7269\u8cea\u8ddf\u539f\u5b50\u6838\u78b0\u649e\u7684\u8b49\u64da\u3002\u5929\u6587\u5b78\u5bb6\u5247\u662f\u5c0b\u627e\u5b87\u5b99\u4e2d\u662f\u5426\u6709\u5f37\u70c8X\u5149\u7684\u6e90\u982d\uff0c\u56e0\u70ba\u9019\u4e5f\u53ef\u80fd\u662f\u6697\u7269\u8cea\u5b58\u5728\u7684\u8de1\u8c61\u3002<\/p>\n<p>\u7f8e\u570b\u5167\u83ef\u9054\u5927\u5b78\u7684Andrei Derevianko\u53ca\u52a0\u62ff\u5927\u7dad\u591a\u5229\u4e9e\u5927\u5b78\u8ddfPerimeter Institute for Theoretical Physics\u7684 Maxim Pospelov\u63d0\u51fa\u4e86\u4e00\u500b\u65b0\u7684\u65b9\u6cd5\uff1a\u5229\u7528GPS\u4f86\u5c0b\u627e\u6697\u7269\u8cea\u3002<\/p>\n<p>\u5c0d\u6211\u5011\u7684\u65e5\u5e38\u751f\u6d3b\u800c\u8a00\uff0cGPS\u662f\u7576\u6211\u5011\u958b\u8eca\u5728\u5916\u6642\u5e6b\u6211\u5011\u78ba\u8a8d\u4f4d\u7f6e\uff0c\u751a\u81f3\u627e\u8def\u7684\u597d\u5e6b\u624b\u3002GPS\u4e3b\u8981\u7684\u4f5c\u7528\u539f\u7406\u662f\u6839\u64daGPS\u885b\u661f\u4e0a\u7684\u539f\u5b50\u9418\u7cbe\u78ba\u5b9a\u6642\u7684\u80fd\u529b\uff0c\u5229\u7528\u4e0d\u540c\u885b\u661f\u6240\u767c\u51fa\u7684\u8a0a\u865f\u5230\u89c0\u6e2c\u8005\u4e4b\u9593\u7684\u6642\u9593\u5dee\u4f86\u9032\u884c\u5b9a\u4f4d\u3002<\/p>\n<p>\u90a3\u9019\u5169\u4f4d\u7269\u7406\u5b78\u5bb6\u4e8b\u6253\u7b97\u5982\u4f55\u7528GPS\u4f86\u5c0b\u627e\u6697\u7269\u8cea\u5462\uff1f\u4ed6\u5011\u8a8d\u70ba\u53ef\u80fd\u662f\u5b87\u5b99\u6642\u7a7a\u7d50\u69cb\u4e2d\u7684\u4e00\u4e9b\u7570\u5e38\u72c0\u614b\uff0c\u4e5f\u6709\u53ef\u80fd\u50cf\u662f\u4e00\u5718\u770b\u4e0d\u898b\u7684\u96f2\u9727\u4e00\u6a23\u3002\u7576GPS\u885b\u661f\u7cfb\u7d71\u96a8\u8457\u5730\u7403\u79fb\u52d5\u7684\u6642\u5019\uff0c\u6709\u53ef\u80fd\u6703\u78b0\u5de7\u6383\u904e\u9019\u4e9b\u6642\u7a7a\u7d50\u69cb\u7684\u7570\u5e38\u72c0\u614b\uff0c\u6216\u662f\u78b0\u5230\u9019\u4e9b\u96f2\u9727\u822c\u7684\u6697\u7269\u8cea\u3002\u9019\u6642GPS\u885b\u661f\u4e2d\u7684\u539f\u5b50\u9418\u4fbf\u6709\u53ef\u80fd\u56e0\u6b64\u53d7\u5230\u64fe\u52d5\u3002\u63db\u53e5\u8a71\u8aaa\uff0c\u900f\u904eGPS\u539f\u5b50\u4e2d\u7684\u4e9b\u8a31\u64fe\u52d5\uff0c\u4ed6\u5011\u53ef\u4ee5\u628a\u6574\u5957GPS\u885b\u661f\u7cfb\u7d71\u8b8a\u6210\u6700\u9748\u654f\u7684\u6697\u7269\u8cea\u5075\u6e2c\u5668\u3002<\/p>\n<p>Derevianko\u5229\u7528\u4f4d\u65bcNevada Geodetic Laboratory\u7684GPS\u8cc7\u6599\u4f86\u9a57\u8b49\u4ed6\u5011\u7684\u60f3\u6cd5\u3002\u9019\u500b\u5be6\u9a57\u5ba4\u64c1\u6709\u5168\u4e16\u754c\u6700\u5927\u91cf\u7684GPS\u6578\u64da\uff0c\u5168\u5e74\u7121\u4f11\u7684\u6536\u96c6\u4f86\u81ea\u5168\u4e16\u754c12000\u500b\u8cc7\u6599\u7ad9\u7684\u6578\u64da\u3002\u5982\u679c\u4ed6\u5011\u53ef\u4ee5\u770b\u5230\u539f\u672c\u61c9\u8a72\u662f\u540c\u6b65\u7684\u885b\u661f\u51fa\u73fe\u5fae\u5c0f\u7684\u7570\u5e38\uff0c\u4f8b\u5982\u5341\u5104\u5206\u4e4b\u4e00\u79d2\u7684\u8aa4\u5dee\uff0c\u90a3\u9ebc\u4ed6\u5011\u53ef\u80fd\u5c31\u53ef\u4ee5\u770b\u5230\u9019\u4e9b\u6697\u7269\u8cea\u3002<\/p>\n<p>\u9019\u500b\u65b9\u6cd5\u6703\u4e0d\u6703\u6210\u529f\u5462\uff1f\u5927\u5bb6\u90fd\u5728\u62ed\u76ee\u4ee5\u5f85\u3002<\/p>\n<p><strong>\u539f\u59cb\u8ad6\u6587<\/strong><br \/>\nHunting for topological dark matter with atomic clocks<br \/>\nA. Derevianko &amp; M. Pospelov<br \/>\nNature Physics 10, 933\u2013936 (2014)<br \/>\ndoi:10.1038\/nphys3137<\/p>\n<p><strong>\u76f8\u95dc\u5831\u5c0e\uff1a<\/strong><br \/>\nPhys.org 2014\/11\/17: <a href=\"http:\/\/phys.org\/news\/2014-11-elusive-dark-gps-satellites.html\" target=\"_blank\" rel=\"noopener noreferrer\">Elusive dark matter may be detected with GPS satellites<\/a><\/p>\n<p><span style=\"color: #333399;\"><strong>--<\/strong><\/span><br style=\"color: #000000;\" \/><span style=\"color: #333399;\"><strong>\u4f5c\u8005\uff1a\u9673\u52c1\u8c6a\u3000\u79d1\u6559\u4e2d\u5fc3\u7279\u7d04\u5beb\u624b\uff0c\u5f9e\u4e8b\u79d1\u666e\u6587\u7ae0\u5beb\u4f5c\u30022011\u5e74\u65bc\u7f8e\u570b\u7d10\u7d04\u5dde\u7acb\u77f3\u6eaa\u5927\u5b78(SUNY at Stony Brook)\u53d6\u5f97\u535a\u58eb\u5b78\u4f4d\uff0c\u7814\u7a76\u4e3b\u984c\u70ba\u76f8\u5c0d\u8ad6\u6027\u91cd\u96e2\u5b50\u78b0\u649e(Relativistic Heavy Ion Collision)\u3002\u9577\u671f\u64d4\u4efb\u4e2d\u6587\u79d1\u5b78\u65b0\u805e\u7db2\u7ad9\u300c\u79d1\u666f\u300d\uff08Sciscape.org\uff09\u7e3d\u7de8\u8f2f\u3002<\/strong><\/span><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/line.me\/R\/ti\/p\/%40fcx6182w\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" class=\"alignnone\" src=\"https:\/\/scdn.line-apps.com\/n\/line_add_friends\/btn\/zh-Hant.png\" alt=\"\u52a0\u5165\u597d\u53cb\" width=\"212\" height=\"36\" border=\"0\"><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u25a0\u5168\u7403\u5b9a\u4f4d\u7cfb\u7d71(GPS)\u4e0d\u53ea\u53ef\u4ee5\u7528\u4f86\u5e6b\u6211<\/p>\n","protected":false},"author":20,"featured_media":21115,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1022,1023,3293,39],"tags":[1055,1759,1761,1535,1760],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/case.ntu.edu.tw\/blog\/wp-content\/uploads\/2015\/03\/1-hidinginplai.jpg","_links":{"self":[{"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/posts\/21114"}],"collection":[{"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=21114"}],"version-history":[{"count":10,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/posts\/21114\/revisions"}],"predecessor-version":[{"id":32205,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/posts\/21114\/revisions\/32205"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=\/wp\/v2\/media\/21115"}],"wp:attachment":[{"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21114"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21114"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/case.ntu.edu.tw\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}