重力场中的大地奇异性问题

研究了大地奇异性对大地测量的影响及重力场在大地奇点附近的结构,揭示了奇异性的本质。     

三层BP网隐层节点数确定方法的研究

对确定三层BP网络隐层节点数的理论依据和现有做法进行了研究,提出了一种三层BP网络隐层节点数的双向确定法     

道路交通事故现场快速测绘系统

介绍道路交通事故现场快速测绘系统的设计原理、系统构成、系统功能和主要技术。     

顶面倾斜电视塔架柱基础的放样、检测及成果统计分析

本文结合具体工程,叙述了用精密水准控制顶面倾科的巨型电视塔架柱基础顶面,以及用高精度控制点控制塔架柱基础顶面中心位置的测设方案,进行了检测成果的统计分析,从而保证了测设精度的成功作法。     

深基静载试验与沉降观测

用深基静载试验成果,确定地基土承载力标准值并估算高层建筑的沉降量。通过建筑物沉降观测,对试验成果进行分析和评价,认为用此种方法确定地基承载力标准值,可直接用于工程设计。     

Precise orbit and baseline determination for maneuvering low earth orbiters

GPS Solutions - Orbital maneuvers are usually performed as needed for low earth orbiters to maintain a predefined trajectory or formation-flying configuration. To avoid unexpected discontinuities...     

An examination of the Galileo NeQuick model: comparison with GPS and JASON TEC

GPS Solutions - We evaluate the performance of Galileo broadcast NeQuick model by comparing it with GPS broadcast Klobuchar and the original NeQuick2 models. The broadcast coefficients of Galileo...     

Design of an adaptive GPS vector tracking loop with the detection and isolation of contaminated channels

GPS Solutions - In vector tracking loop (VTL), the relativity among received signals is exploited to deeply integrate the entire information within signal processing channels. However, the tracking...     

Enhanced orbit determination for BeiDou satellites with FengYun-3C onboard GNSS data

GPS Solutions - A key limitation for precise orbit determination of BeiDou satellites, particularly for satellites in geostationary orbit (GEO), is the relative weak geometry of ground stations....