井下高压电网智能化综合保护系统的研究

在分析电网漏电故障规律的基础上,设计了一种适于不同中性点接地方式的电网的新型智能化综合保护系统。本文重点分析保护系统的原理,并介绍了硬件结构和软件框图。该保护系统经试验运行性能稳定,运行可靠,具有推广价值。     

基于P89LPC932A1容栅传感器智能接口的设计

在精密检测和高精度生产过程中,基于容栅式传感器的测量器具得到广泛运用,但一般为单机工作,不便于联机处理。研制了以P89LPC932A1单片机为核心的智能接口,并采用可视化编程工具C++Builder实现其与PC机的接口控制和数据处理功能,基于此接口实现了容栅传感器在生产过程中的检测与控制。     

六盘山盆地海参1井层序地层学分析

从海参1井钻井剖面出发,建立六盘山盆地中新生代层序地层格架。在海参1井钻井剖面上识别出二级层序界面1个:SB1Ⅱ(下第三系寺口子组底面);三级层序界面3个:SB1Ⅲ1(下白垩统底面),SB1Ⅲ2(马东山组底面)和SB1Ⅲ3(上第三系甘肃群底面);划分出2个超层序、5个Ⅲ级层序。     

基于MATLAB的图形用户界面(GUI)设计

MATLAB6.x的GUIDE是专门用于图形用户界面 (GUI)程序设计的快速开发环境。从介绍GUIDE入手 ,结合具体的软件图形界面实例 ,给出了利用GUIDE制作图形用户界面的基本方法。在该例子中 ,利用GUIDE设计的界面不仅可以对输入的数据进行曲线拟合 ,建立数学模型 ,而且还可以通过此模型作进一步的预测和分析 ,界面友好 ,具有开放性 ,方便用户不断地完善和扩充其功能。     

无人机地面测控软件

为满足对无人机飞行的实时监控以及后期数据处理分析的需要,并能给予地面测控人员更真实的飞行控制直观感受,开发一种基于中央操纵杆的无人机地面测控软件。基于VC++,结合实际物理设备,分析该软件的总体结构设计,介绍地面测控软件的人机界面,给出地面测控软件的遥控遥测模块功能的设计与实现,并进行无人机地面仿真试验。仿真试验结果表明:该软件正确合理,满足设计要求,已用于实际无人机飞行项目中。     

液晶投影电视中视频信号与显示模件接口电路的设计与研究

本文介绍了液晶投影电视的基本原理和光学系统,根据液晶显示模件的接口参数,设计了液晶投影电视的接口电路,对该电路的工作原理进行了分析和讨论。同时,对行同步相位调整电路进行了详细的电路设计和研究。     

中国大陆科学钻探钻探子工程钻进实时记录网页的开发

以中国大陆科学钻探实时记录网页的开发为例,介绍了在开发网络数据库时,利用Excel组件作输入界面,实现查询界面上表格的表头和表尾不动、而中间行可以滚动,实现回次滚动查询和界面实时刷新.     

数控程序的便携式传送

数控程序的便携式传送装置,通过USB接口将数控程序按约定格式转存到便携式传送装置U盘中,再携带U盘到指定数控机床,通过RS232接口以既定通信协议将数控程序传送到数控机床中.     

Scale Tests of Smoke Filling in Large Atria

The large Atriums of airports and railway stations facilitate the access to transport vehicles including shopping malls, cultural spaces, etc. For this reason, they are used by an elevated number of passengers and visitors. Numerous malls contain a large atrium too, as a principal access or as a food court, and they usually have high occupant loads. In case of fire, the smoke can affect human health seriously, and people may be unable to reach a safe place before being overcome by the conditions created by the fire. The traditional approach to fire protection by compartmentation is not applicable to these large volume spaces and the ability of sprinklers to suppress fire in spaces with high ceilings is limited. This work evaluated—using scale tests, fire computer modeling and analytical methods—a comparative analysis of the different results obtained for the smoke control in large atria when the smoke filling approach is applied. Smoke layer and plume temperatures have been registered during the scale test—based on the Froude Modeling—and they have been compared opposite to the FDS scale simulation and the FDS large scale simulation. Smoke layer descend has been studied and compared for the scale test, the computer simulations developed and the empirical equations used. The results demonstrated that the evacuation time calculation is conservative when the zone computer model CFAST, the field computer model FDS or the empirical equations are used, although it turns out to be difficult to define the interface height based on the temperatures registered during the scale tests. The zone computer models generate results faster than field computer models or smoke tests, so it would be necessary to develop better calculation algorithms to define the smoke layer interface.

砾石垫层-混凝土接触面力学特性单剪试验研究

混凝土面板坝的安全与面板的受力状态密切相关。混凝土面板与砾石垫层料的特性有较大差异,两者之间接触面的力学特性,对于面板的应力与变形具有重要影响。结合国内在建的水布垭高面板堆石坝的设计科研需要,研制了一大型叠环式单剪仪,对面板与砾石垫层间接触面的力学特性进行了试验研究。为了对接触面的不同处理方式的效果进行对比,为设计方案的选择提供依据,分别进行了混凝土面无保护、砂浆保护和乳化沥青保护三种接触面的剪切试验。