Five-hundred-meter Aperture Spherical Radio Telescope(FAST)is a Chinese mega-science project to build the largest and most sensitive single dish radio telescope in the world.
Fast response and low orbit satellites have advantages just like wide coverage,all-weather work,low cost of system construction,and so on,very suit-able for positioning service as navigation sources f
Since the distribution of sate variables of satellite orbit estimation is non-Gaussian,the particle filtering algorithm is put forward.Through the presen-tation of the particle filtering algorithm and
With the continuous development of science and technology,the attitude precise determination of the carriers is of important practical value as to whether in the military,civilian or commercial aspect
One of the main purposes of UNOOSA establishing the International Committee on Global Navigation Satellite System(ICG)is to promote compatibility and interoperability between Global Navigation Satelli
The receiver integrity monitoring technology is one of the important technologies to reflect the GNSS integrity.It can be divided into receiver autonomous integrity monitoring(RAIM)and auxiliary auton
介绍了美诺福公司的宝钢湛江铁钢分析中心项目,介绍了项目概况、设计理念、实验室布局、装备说明、系统功能、自动化实现、数据通讯及管理.
Space mini passive hydrogen maser is one of the key technologies for satellite navigation system.Engineering model of 15kg space mini passive hydrogen maser has been developed in Shanghai Astronomical
采用激光诱导击穿光谱原位统计分布分析技术(LIBS-OPA)和扫描电镜能谱(SEM/EDS)分析冷轧热镀锌板表面的条形缺陷的元素分布和形成原因.使用激光光谱进行面扫描,扫描范围跨过镀锌板表面的条形缺陷,并作出元素强度二维分布图,得到样品表面的元素的富集和缺失情况.
采用激光诱导击穿光谱法对不同工艺下的焊接接头根部中心区域进行了Cu的深度分布分析,探讨了不同材料的LIBS激发脉冲数目与其剥蚀深度的相关性,并由此计算了焊接接头根部中心部位渗铜区域的深度,同时绘制了匹配的中低合金钢的定量分析校准曲线,对不同渗铜区深度方向的铜含量进行了分布分析,发现不同工艺下的焊接接头的渗铜程度有较大差别,其中带铜垫脉冲控制工艺焊接的接头在某些区域出现了较为严重的渗铜现象,而无铜垫