雪崩光电二极管高精度三维微调架结构设计与分析

通过利用计算机软件实体建模及有限元分析和测试实验的方法,为某卫星激光测距系统的雪崩光电二极管接收器设计了新型结构的高精度三维微调架.首先,使用UG软件进行三维实体建模;然后,利用有限元分析软件MSC.Patran对微调架模型进行静力分析和模态分析;最后,对微调架实物进行振动和精度测试实验.实验结果和有限元分析结果较为吻合,验证了有限元分析的可靠性.软件设计及分析和测试实验的结果表明微调架的设计满足预期的设计要求,能够实现对雪崩二极管的精密调整,使其正常工作.     

马尔科夫链模型在软件可靠性测试中的应用研究

现行的软件可靠性分析方法禁锢了人们从更简单层次对软件系统的可靠性进行研究.基于上述认识,为了缩短软件测试周期,文中提出了一种新的软件可靠性测试分析方法.该方法把马尔科夫链模型运用于软件可靠性测试中,在测试过程中使用了新的评判准则分析测试结果,通过实例证明了该评判准则的实用性和有效性,从而为更快速地评估软件的可靠性提供了可能.     

安全软件测试的一种技术实现

本文分析了铁路信号安全软件测试评估平台的结构，测试案例的生成，运行集的生成以及回归测试。运用测试平台能实现对微机联锁软件的功能测试和安全性测试，提高联锁软件的可靠性安全性。     

惯性器件自动测试平台设计

结合惯性器件测试平台的发展现状,指出了设计惯性器件自动测试平台的必要性,给出了测试平台的总体设计思想以及硬件和软件的设计.该测试平台具有良好实时性、稳定性、可靠性和通用性,同时提供了友好的人机交互界面,使整个测试过程操作方便,减少了人为的测试误差,实现了测试自动化.     

机载火控陀螺组件综合自动测试系统的设计

介绍了机载火控陀螺组件自动测试系统的硬件和软件的结构。可对不同类型的机载火控陀螺组件进行总体性能测试。还可对陀螺组件内部的板间信号和输出信号进行测试，系统的可靠性和测试精度达到了设计要求。具有较好的通用性。     

雷达FPGA软件测试技术研究与实现

在软件测试技术的基础上针对FPGA特点进行了改进,归纳出雷达FPGA软件的测试过程,重点阐述了雷达FPGA软件测试设计与实现的过程.研究并制定了符合雷达FPGA软件的编码规范、测试规范,同时在实际项目中试点验证,实现持续改进,及早及时地发现和关闭FPGA设计开发过程中存在的缺陷,提高了FPGA软件的编写质量和系统的可靠性.     

马尔可夫链模型在软件可靠性测试中的应用

现行的软件可靠性分析方法禁锢了人们从更简单层次对软件系统的可靠性进行研究。基于上述认识,为了缩短软件测试周期,文中提出了一种新的软件可靠性测试分析方法。该方法把马尔可夫链模型运用于软件可靠性测试中,在测试过程中使用了新的评判准则分析测试结果,通过实例证明了该评判准则的实用性和有效性。从而为更快速地评估软件的可靠性提供了可能。     

基于PC104总线的多路温度测试系统设计

本文描述了测温电桥作为温度传感器的工作原理,并讨论基于PC104总线的多路温度测试系统设计,在此基础之上给出了系统的硬件组成原理框图和软件流程图.实验结果表明,该测试仪具有测试速度快、可靠性强、自动化水平高等特点.     

航天遥感相机TDI CCD成像系统逻辑软件测试平台的设计

为提高航天任务中航天遥感相机软件系统工作的可靠性和稳定性,需要设计专门的逻辑软件测试平台,对软件配置项进行独立、全面的测试。提出航天遥感相机TDI CCD成像系统逻辑软件测试平台的设计方案。详细的介绍测试平台的主要组成部分和电路设计,并在实际检测中完成对TDI CCD成像系统的主控逻辑FPGA和数据处理逻辑FPGA的配置项测试,为软件配置项的改进和完善提供条件。     

某型飞机发射装置虚拟测试仪的设计与实现

为了克服现有检测设备使用复杂、接口不一、检测时间长且不能脱机使用等缺陷,提高飞机发射装置测试设备的测试性能,设计了某型飞机发射装置虚拟测试仪.该仪器的硬件部分以IPC-610型工业控制计算机为核心,采用可编程接口电路、转换电路、强电信号隔离电路等电路,实现了发射装置快速准确的自检、通路测试及电阻测试等功能;软件部分采用虚拟仪器技术并用Visual C 编程,使仪器具有操作简单和可靠性高等优点.试用结果表明,该仪器测试精度高、通用性强、可靠性强,保障能力强、具有很好的推广应用前景.     

关于软件可靠性测试的若干问题

软件可靠性测试是软件测试的一种形式,它强调软件测试与软件可靠性之间的定量关系,旨在定量改进和评估软件可靠性。从数学角度严格量化软件测试与软件可靠性之间的关系是一件困难的事情。本文举例说明软件可靠性测试中的几个问题,包括软件缺陷的估计、软件测试过程的数学建模、以及软件可靠度的最优估计等。由此可知,软件可靠性测试涉及到不同领域的知识和多种数学工具。     

基于TestQuest的嵌入式软件可靠性测试环境框架研究

嵌入式软件是软件中最难测试的一种软件,该文提出了一种嵌入式软件可靠性测试环境框架,分析了嵌入式软件测试与普通软件测试的异同。针对嵌入式软件难于测试的问题,运用仿真测试和自动化测试方法,并利用TestQuest工具辅助构建环境,重点介绍了框架中各个模块的功能、实时控制器的分层结构实现、上位机与实时控制器的通信协议编写方法,最后通过实例验证该平台有良好的适应性和易操作性。     

Change-points-based software scheduling

Software reliability literature consists of various change-point-based software reliability growth models and related release time problems. The primary assumption of the existing models is the existence of change-point before software release time only. This does not look practical as the testing team becomes more proficient in detecting the faults due to their continuous involvement in software development by the software release time. Hence the fault detection rate in the pre- and postrelease phase is not the same. To capture this change in fault detection rate in the pre- and postrelease testing phase, we propose a new software reliability modeling framework by considering two change-points during the software lifecycle; that is, there exists a change-point before release time and release time as a change-point. Further, in the last one-decade software firms have changed their strategy of stop testing the software after release and continue to test even after release to remove the number of faults to provide better user experiences. This phenomenon attracted academicians to develop theoretical as well empirical study on postrelease testing and formulation of related release time problem. In this paper, we propose a software cost model to determine optimal release and testing stop time considering under the assumption of two change-points as mentioned above. The proposed model is validated on real-life data set.     

电能表嵌入式软件半仿真测试系统设计

电子式电能表嵌入式软件测试依赖目标机和外部交互设备,运行环境与测试环境相适应问题是嵌入式软件仿真测试的技术难题.在研究了嵌入式软件仿真技术的基础上,提出了一种电子式电能表嵌入式软件半仿真测试的方法,构建了仿真测试环境,以实现对被测系统中嵌入式软件的动态测试.同时,还对其中的计算机仿真系统模拟外部交互设备、仿真测试环境工作模型进行了分析说明,通过对电子式电能表测试,验证该方法能较好地满足电子式电能表嵌入式软件测试.     

Designing a software reliability programme

Designing reliable software is becoming an ever increasing problem because the high cost of software is largely due to reliability problems. The costs of finding and fixing the errors, better known as maintenance and testing costs, account for as much as 80 per cent of the total cost of the final software product. Software developers now have an even greater interest in preventing errors from making their way into the software and finding the errors that are present in the early stages of development. Precise software design, coding and testing play an important role. This paper presents a management plan for implementing a software reliability programme at a small software industry where no reliability programme yet exists and no reliability programme is yet established.     

面向对象的软件测试

面向对象软件测试是提高面向对象软件质量和可靠性的关键,然而,面向对象软件的理论研究和工程实践在我国还几乎是一个空白。面向对象所具有的类,封装,继承,动态连接等特性。使得面向对象测试步骤的划分以及测试策略的选择有别于传统的测试思想,也增加了测试用例的设计难度。     

基于LabVIEW的车体振动加速度信号处理

车体耦合振动影响行车安全,因而研究车体振动加速度信号可以有效地测试火车的安全运行情况,为进一步改进车体结构,保障行车安全,采用加速度传感器对车体振动进行了在线检测。利用LabVIEW软件开发平台,采用滤波方法进行粗略地提取,实现车体振动加速度信号的显示和处理。实际表明,该系统结构简单,运行速度快,抗干扰性强,具有较高的可靠度。     

Generalized multi‐release modelling of software reliability growth models from the perspective of two types of imperfect debugging and change point

Owing to release of software in multiple releases, code changes take place in software. Because of this added complexity in software, the testing team may be unable to correct the fault upon detection, leaving the actual fault to reside in the software, termed as imperfect debugging or there may be replacement of original fault by other fault, leading to error generation. Many other factors exist that affect the testing phase of software like strategies of testing, test cases, skill, efficiency, and learning of testing team. All these factors cannot be kept stable during the whole process of testing. They may change at any time moment causing the background processes to experience change, which is known as change‐point. Keeping all these critical testing environment factors under consideration, a new software reliability growth model has been proposed, which is derived from an non homogenous Poisson process (NHPP)based unified scheme for multi‐release two‐stage fault detection/observation and correction/removal software reliability models. The developed model is numerically illustrated on tandem data set for four releases.     

Two Case Studies in Applying Statistical Models in Software Development

We present two case studies in software testing to illustrate two different goals of software reliability analyses. The first case study is about administrative software of an insurance company, while the second one is on an issue of national interest in the Netherlands: safety of software control of a closable dam as part of a sea flood protection system. We pay attention to practical and methodological aspects that often are ignored or not correctly treated in software reliability analyses. In particular, we provide pointers to recent statistics literature that are relevant for software reliability.