VB程序设计考核自动评阅系统中若干问题的研究

在大规模的计算机应用能力考核中,必须要实现自动阅卷,对于Visual Basic基础程序设计考核,提出了一种自动评阅的方法,详细描述了该软件的设计思想、设计目的,并对阅卷过程中影响系统健壮性的因素作了深入分析。     

硅压力传感器的可靠性试验方法及失效分析

通过对一种特定结构的硅压力传感器进行动态综合应力寿命试验 ,探讨了硅压力传感器的可靠性实验方法 ;并对失效样品进行了解剖分析 ,研究了它在温度、电压和压力共同作用下的失效机理 ,分析了产品设计、工艺与可靠性的关系 ,提出了相应的改进措施。     

Time of flight mass spectrometry applied to the liquid chromatographic analysis of pesticides in water and food

Liquid chromatography coupled to mass spectrometry (LC-MS) is an excellent technique to determine trace levels of polar and thermolabile pesticides and their degradation products in complex matrices. LC-MS can be equipped with several mass analyzers, each of which provides unique features capable to identify, quantify, and resolve ambiguities by selecting appropriate ionization and acquisition parameters. We discuss in this review the use of LC coupled to (quadrupole) time-of-flight mass spectrometry (LC-(Q)ToF-MS) to determine the presence of target and non-target pesticides in water and food. This technique is characterized by operating at a resolving power of 10,000 or more. Therefore, it gives accurate masses for both parent and fragment ions and enables the measurement of the elemental formula of a compound achieving compound identification. In addition, the combination of quadrupole-ToF permits tandem mass spectrometry, provides more structural information, and enhances selectivity. The purpose of this article is to provide an overview on the state of art and applicability of liquid chromatography time-of-flight mass spectrometry (LC-ToF-MS), and liquid chromatography quadrupole time-of-flight mass spectrometry (LC-QToF-MS) for the analysis of pesticides in environmental matrices and food. The performance of such techniques is depicted in terms of accurate mass measurement, fragmentation, and selectivity. The final section is devoted to describing the applicability of LC-(Q)ToF-MS to routine analysis of pesticides in food matrices, indicating those operational conditions and criteria used to screen, quantify, and identify target and "suspected" pesticides and their degradation products in water, fruits, and vegetables. The potential and future trends as well as limitations of LC-(Q)ToF-MS for pesticide monitoring are highlighted.     

WIN9X环境下驱动程序的实现

本简述了DLL（动态链接库）和VXD（虚拟设备驱动程序）的区别,通过实例,介绍了这两种方法在同一控制系统中的实现。     

面向对象程序设计技术的实现方法

对面向对象的软件设计技术的特点进行了分析,以网上ＣＥＴ考试为例,叙述了用对象技术的思想对问题进行分析、建模的方法,具体分析了网上ＣＥＴ考试系统中对象的提取原则、对象之间的关系和相互作用。设计实现了一个全自动 ＣＥＴ网上考试软件,并给出了关键部分的代码。     

On the generation of test patterns for multiple faults

This article presents a new method to generate test patterns for multiple stuck-at faults in combinational circuits. We assume the presence of all multiple faults of all multiplicities and we do not resort to their explicit enumeration: the target fault is a single component of possibly several multiple faults. New line and gate models are introduced to handle multiple fault effect propagation through the circuits. The method tries to generate test conditions that propagate the effect of the target fault to primary outputs. When these conditions are fulfilled, the input vector is a test for the target fault and it is guaranteed that all multiple faults of all multiplicities containing the target fault as component are also detected. The method uses similar techniques to those in FAN and SOCRATES algorithms to guide the search part of the algorithm, and includes several new heuristics to enhance the performance and fault detection capability. Experiments performed on the ISCAS'85 benchmark circuits show that test sets for multiple faults can be generated with high fault coverage and a reasonable increase in cost over test generation for single stuck-at faults.     

一种新型冲击高压数字化测量系统

较详细地介绍了西安高压电器研究所最近研制的冲击高压数字化测量系统(IHMS)的组成、性能技术指标、软件功能等。全套系统具有强的抗干扰性能、方便的操作环境,其自动化程度高,能满足IEC1083—1“高压冲击试验用数字记录仪第一部分:对数字记录仪的要求”标准和相关的最新国家标准的要求,且性能价格比高,是一种可广泛推广的高新技术产品。     

战术导弹飞行数据采集存储系统

介绍了某型战术导弹飞行数据采集存储系统的研制概况 ,重点介绍了采集存储系统的工作原理 ,软、硬件应用设计构想 ,存储器保护措施和存储数据的还原办法。     

逻辑分析仪在图形显示系统测试中的应用

根据图形显示系统的工作原理 ,提出了一种以RGB三基色为测试信号源的逻辑测试方案 ,并用逻辑分析仪对某一图形显示系统进行实例测试和分析 ,为图形显示系统的测试提供了一种简便实用的方法。     

VXI测试总线系统的电磁兼容分析

介绍了电磁兼容的基本理论和研究目的 ,阐述了其在电子系统中的重要作用。结合当今流行的VXI测试总线 ,运用电磁兼容理论和技术 ,分析了构建VXI测试系统过程中在电磁兼容方面应注意的一些问题及解决方法 ,对充分发挥VXI总线测试系统的性能、降低电磁干扰、实现电磁兼容有一定的工程应用价值。