As an improvement of the combinatorial realization of totally positive matrices via the essential positive weightings of certain planar network by S.Fomin and A.Zelevinsky[7],in this paper,we give a test method of pos...As an improvement of the combinatorial realization of totally positive matrices via the essential positive weightings of certain planar network by S.Fomin and A.Zelevinsky[7],in this paper,we give a test method of positive definite matrices via the planar networks and the so-called mixing-type sub-cluster algebras respectively,introduced here originally.This work firstly gives a combinatorial realization of all matrices through planar network,and then sets up a test method for positive definite matrices by LDU-decompositions and the horizontal weightings of all lines in their planar networks.On the other hand,mainly the relationship is built between positive definite matrices and mixing-type sub-cluster algebras.展开更多
在铁路线路工程平面控制网卫星定位测量中,需要将大量GNSS接收机原始观测数据转换为与接收机无关的RINEX格式文件,以天宝GNSS接收机观测数据为研究对象,采用C#语言对该公司提供的GNSS接收机原始观测数据解码程序Convert To RINEX进行二...在铁路线路工程平面控制网卫星定位测量中,需要将大量GNSS接收机原始观测数据转换为与接收机无关的RINEX格式文件,以天宝GNSS接收机观测数据为研究对象,采用C#语言对该公司提供的GNSS接收机原始观测数据解码程序Convert To RINEX进行二次开发,分析该程序的批处理文件语法规则,然后基于批处理文件调用Convert To RINEX程序的方式,编制天宝GNSS观测数据批处理程序。工程实践表明,该批处理器软件能够方便快捷地将海量原始数据批量转换为RINEX格式文件,极大地节约卫星定位测量数据处理工程中数据预处理所需时间,显著提高了生产效率。展开更多
基金Supported by the National Natural Science Foundation of China(11671350,11571173,11801043)Natural Science Foundation for Youths of Jiangsu Province(BK20181031).
文摘As an improvement of the combinatorial realization of totally positive matrices via the essential positive weightings of certain planar network by S.Fomin and A.Zelevinsky[7],in this paper,we give a test method of positive definite matrices via the planar networks and the so-called mixing-type sub-cluster algebras respectively,introduced here originally.This work firstly gives a combinatorial realization of all matrices through planar network,and then sets up a test method for positive definite matrices by LDU-decompositions and the horizontal weightings of all lines in their planar networks.On the other hand,mainly the relationship is built between positive definite matrices and mixing-type sub-cluster algebras.
文摘在铁路线路工程平面控制网卫星定位测量中,需要将大量GNSS接收机原始观测数据转换为与接收机无关的RINEX格式文件,以天宝GNSS接收机观测数据为研究对象,采用C#语言对该公司提供的GNSS接收机原始观测数据解码程序Convert To RINEX进行二次开发,分析该程序的批处理文件语法规则,然后基于批处理文件调用Convert To RINEX程序的方式,编制天宝GNSS观测数据批处理程序。工程实践表明,该批处理器软件能够方便快捷地将海量原始数据批量转换为RINEX格式文件,极大地节约卫星定位测量数据处理工程中数据预处理所需时间,显著提高了生产效率。
