目的探讨时辰和天文潮汐对山东省日照地区脑出血患者发病的影响。方法采用回顾性调查的方法,收集2006年1月1日—2010年12月31日在......

Sun observations provide a robust way for determining the geodetic or true azimuth at a location. Azimuth is generally d......

Three new worldwide calendars are proposed and compared in this paper. None of them requires any departure from an exist......