浅谈SQA在GJB5000A二级实施过程中的作用

随着软件占据军工产品位置的越来越重,对软件质量和可靠性的要求也越来越高。该文通过介绍GJB5000A二级过程与产品质量保证(PPQA)过程域在项目实施中的重要作用,说明了充分发挥SQA的作用,能切实提高研制软件的质量。     

最新高端函数／任意波形发生器集成丰富功能

普源精电(RIGOL)目前推出一款高端信号源产品--DG5000系列函数/任意波形发生器.DG5000系列函数/任意波形发生器集成了矢量信号调制、跳频信号输出等丰富功能,是一款多功能的高端信号源.     

Compatibilized poly(ether imide)/LCP blends: drawing ability and mechanical properties of the ribbons

The effects of the addition of polyarylate (PAr) on the drawing ability of poly(ether imide) (PEI)/Rodrun liquid‐crystalline 5000 (Ro LC5000) (Ro) blends and on the mechanical properties of their ribbons were studied. The compatibilizing effect of the PAr led to an increase in the drawing ability of the blends, as seen by the fact that the maximum Ro content compatible with the drawing process increased from 15 to 30%. This may lead to new applications in the field of gas barrier materials. The presence of PAr also led to an increase in the adhesion between the two phases of the blends and consequent improved ductility. However, the very high modulus of elasticity and tensile strength in the direction of orientation (up to three‐fold those of the matrix) due to the less developed fibrillation were smaller than the corresponding values before compatibilization. These very large modulus of elasticity and tensile strength values and those perpendicular to the direction of orientation, which were similar to those of the matrix, led to a high anisotropy in the extruded ribbons that increased with the draw ratio (DR) and the Ro contents. The high mechanical properties of the ribbons may be used and the anisotropy diminished by layering the ribbons in, and perpendicular to, the direction of orientation, according to the expected external load. Copyright © 2002 John Wiley & Sons, Ltd.     

华为UA5500设备VoIP语音故障的处理思路及方法

详细归纳和说明了处理UA5000备承载VoIP语音业务故障的注意事项及流程,介绍了对于常见故障,如话机无馈电、话音质量低、摘机无音或忙音、通话不正常、主叫号码无法显示、MG接口故障等的处理思路和方法.     

GJB5000A软件质量的具现化——测量与分析

文章基于GJB5000A二级推广,阐述了工程实施过程中测量与分析过程的目的、内容、标准要求、管理流程以及实施要点,为软件开发人员提供借鉴和指导。     

Natural examples of Valdivia compact spaces

We collect examples of Valdivia compact spaces, their continuous images and associated classes of Banach spaces which appear naturally in various branches of mathematics. We focus on topological constructions generating Valdivia compact spaces, linearly ordered compact spaces, compact groups, L¹ spaces, Banach lattices and noncommutative L¹ spaces.     

基于RX5000/TX5000的无线收发电路

RX5000和TX5000分别是RFMicro Devices公司专为小范围单向无线通信设计生产的接收器和发射器芯片。它们体积小，功耗低，价格便宜，而且性能稳定，使用方便。文中介绍了RX5000、TX5000的特点与功能，给出了以这两种器件为核心设计的无线收发电路，并对其在足球机器人无线通信系统中的应用进行了说明。     

IFIX通过KEPWARE与AB PLC直接通讯配置

IFIX组态软件采用相应的驱动程序可以与多种PLC设备进行通讯,而且对于同一种PLC也会有多种通讯方法。本文通过实际现场项目实例,来详细介绍IFIX4.0与logix5000系列AB PLC通过KEPWARE直接进行通讯。     

系统集成控制技术在空压机上的应用

基于我厂动力能源管理与信息监控系统的实施，我们对原有空压站控制系统进行改造，可以达到设备的自动运行、节约了大量电能的目的。     

衡钢高炉基础自动化控制系统介绍与运用

主要介绍衡钢高炉基础自动化系统Ethernet、ControlNet、DeviceNet三级网络结构,各系统PLC冗余配置情况及控制功能,各系统监控画面HMI操作站配置情况及与PLC通信连接方式。