桥梁工程设计数据库管理系统的研究

基于关系数据库理论的观点，结合工程的实际需要，研究开发了“桥梁工程设计数据库管理系统”。本文讨论了系统分析、数据模型选择、系统的总体设计、一般应用模块。

中小型企业选择云计算ERP信息系统的优势分析

随着中国的经济转型升级,市场上出现了一大批优秀的科技型中小企业,这些企业有很多共性,比如,人员不多,基本不会配备专业的IT人员,员工平均学历较高,对系统的使用体验要求比较高,但此类企业的现金流大都不是很充足,而发展潜力较大,等等。由于这些因素的存在,对ERP的选择相对要求更高些。我们总结了一些中小型公司ERP选择的案例,并对应用效果进行了分析,期望能给其他类似企业ERP的选择提供参考。

Electrodynamic Tethered Deorbit System Dynamics and Performance Analysis

Electrodynamic tethered deorbit technology is a novel way to remove abandoned spacecrafts like upper stages or unusable satellites. This paper investigates and analyses the deorbit performance and mission applicability of the electrodynamic tethered system. To do so, the electrodynamic tethered deorbit dynamics with multi-perturbation is firstly formulated, where the Earth magnetic field, the atmospheric drag, and the Earth oblateness effect are considered. Then, the key system parameters, including payload mass, tether length and tether type, are analyzed by numerical simulations to investigate their influences on the deorbit performance and to give the setting principles for choosing system parameters. Based on this and given an appropriate group of system parameters, numerical simulations are undertaken to study the impact of the mission parameters, including orbit height and orbit inclination, and thus to investigate the mission applicability of the electrodynamic tethered deorbit technology.

Methods for Industrial Measurement and Basic Principles of Their Choices

In this paper,a variety of industrial objects are systematically analyzed.Ten methods for industrial measurement are summarized.For each method,its nature,advantages,disadvantages and adaptability are briefly given.The basic principles to choose the right industrial method are indicated.

台商大厦给排水设计

本文简要介绍台商大厦（原：东莞台商会馆大楼）给排水施工图设计阶段的主要内容，通过总结消防系统特点，为类似项目的设计提供参考。