基于关键字的自动化软件测试框架设计

软件测试过程是很有可能实现自动化的过程,而实现测试的自动化无论对提高软件的质量还是减少开发成本都有现实意义。文章介绍了基于关键字的自动化测试,以曾所做过的关键字驱动的自动化框架设计为例进行讲解,并介绍了其他常见的自动化测试框架以及两个在自动化测试中常用的工具。     

测试驱动开发技术在航天领域的应用实践

文章介绍了测试驱动开发技术的概念及其在软件开发过程中所起到的设计、文档、测试与基础设施的作用,重点介绍了测试驱动开发技术应用于传统航天工程领域的软件开发实践的方法、步骤,提出了分阶段的训练方法,并对测试驱动开发的效率问题进行了分析。     

一种快速连接机构的研究与设计

本文介绍一种用于变速器下线测试的快速连接机构,在弹簧力的作用下,驱动电机通过该机构可与变速器柔性连接,同步转动。该机构具有结构轻巧、结构简单、工作性能稳定的优点,可缩短测试时间,减少劳动强度,延长试验台寿命,具有很好的实用价值。     

飞控计算机测试设备的设计与实现

为了对飞控计算机进行全面准确测试,本文提出了一种飞控计算机测试设备的软硬件设计方案。硬件部分主要是设计工控机中的两块板卡,产生测试系统需要的信号。软件部分以Windows XP为开发平台,标准C++为开发语言,最终能够合理调度硬件完成测试任务。经实际应用表明,该测试设备性能稳定,操作简单,结果准确,具有一定的实用性和推广价值。     

煤炭卸车系统中定位车提高牵引能力的测试

通过定位车牵引2万吨重车,并在不同工况下进行应力测试和电流测试,得到定位车在不同工况下的测试结果。通过测试结果可以用来考核定位车关键部位的结构强度、牵引力、驱动系统的机械电气性能是否满足连续作业需要,为定位车提高生产能力提供依据,并为日常设备检修提供指导。     

企业质量管理信息系统的研究与实现

论文介绍建立质量信息管理系统的基本原则和质量管理信息系统开发的关键技术,分析质量管理信息系统常见开发方法的特点,并对系统实施与测试进行探讨。     

基于打印机黑盒测试技术研究

黑盒测试是软件测试的一种重要的方法,尽管黑盒测试已经被业内人员所熟知,但是不同的公司对黑盒测试的运用方法已经理解都不尽相同。本文介绍了打印机测试的一点理解与应用。本文首先介绍了黑盒测试的方法,接着分为copy,print,scan,Memory card等模块,分别举例说明了黑盒测试在打印机测试中的运用并且给出一些典型的测试用例,以及介绍对于bug的处理方法。     

试油测试新技术及发展趋势

经济时代发展速度不断提高,油气资源的开发程度也在增长。试油测试技术是石油勘探开发的主要技术支持手段,也是新时代重要的资源开发技术,作为不可再生资源,油气资源环境随着开发与使用逐渐复杂,这也为石油资源开发提出了新的要求。文章根据试油测试新技术的应用情况进行分析,并且对未来试油测试的发展提出方向。     

AP1000核电站多样化驱动系统工厂通道测试浅析

首次应用在核电领域的DAS（多样化驱动系统），为电厂保护系统提供多样化驱动备用，使得电厂安全性进一步提高。文章根据三门核电站DAS工厂通道测试，结合所得数据，对工厂通道测试的过程与注意事项进行阐述，从而为DAS系统的大修以及后续机组的测试提供参考。     

应用度量式测试提高软件测试效率

文章介绍了软件测试领域的发展现状,并将度量式测试应用在实际的医疗曝光系统中,验证了度量式测试对于发现系统隐患、提供系统可靠性及稳定性等的重要作用,并强调了在系统测试过程中需将检查式测试和度量式测试合理结合,提高系统测试效率。     

Distributional and Inferential Properties of the Estimated Precision Cp Based on Multiple Samples

Process precision index C_p has been widely used in the manufacturing industry to provide numerical measures on process potential. Pearn et al. (1998) considered an unbiased estimator of C_p for one single sample. They showed that the unbiased estimator is the UMVUE. They also proposed an efficient test for C_p based on one single sample, and showed that the test is the UMP test. In this paper, we consider an unbiased estimator of C_p for multiple samples. We show that the unbiased estimator is the UMVUE of C_p, which is asymptotically efficient. We also consider an efficient test for C_p, and show that the test is the UMPtest for multiple samples. The practitioners can use the proposed test on theirin-plant applications to obtain reliable decisions.     

论临床检验集中化管理中的数字化建设

检验数据是区域卫生信息数据和居民健康档案的重要组成部分。临床检验集中化管理作为一种医疗资源整合的试点,通过引入先进的数字化管理区域服务平台,能够真正实现区域检验工作流程的全自动化,能够为临床诊疗提供更加准确、及时的检测报告,能够充分发挥区域内检验设备、人才、技术优势,提高检测效率,减少患者的重复检验费用,最终实现了检验报告同城互认。     

On a test of homogeneity for samples from a negative binomial distribution

Summary An exact test is proposed for the equality of probabilities of an event in a series of independent trials, each drawn from a negative binomial distribution with a specified number of successes. The power function of this conditional test is also derived, as well as an approximate test for homogeneity.     

On the performance of tests by Wu and by Hausman for detecting the ordinary least squares bias problem

We first consider the performance of the Wu (1973) - Hausman (1978) (W-H) specification error test as a test for the existence of ordinary least squares (OLS) bias. We discuss power properties of the test under alternative null hypotheses, one of which has not previously been considered. We next consider how the W-H test performs as an indicator of the extent (rather than the existence) of an OLS bias problem, since this usage of the test seems common in applied studies. Finally Monte Carlo methods are used to evaluate Wu's two-step estimation procedure involving the W-H test as a pretest.     

An exact test for a column of the covariance matrix based on a single observation

In this paper, we derive an exact test for a column of the covariance matrix. The test statistic is calculated by using a single observation. The exact distributions of the test statistic are derived under both the null and alternative hypotheses. We also obtain an analytical expression of the power function of the test for the equality of a column of the covariance matrix to a given vector. It is shown that the information contained in a single vector is large enough to ensure a good performance of the test. Moreover, the suggested test can be applied for time-dependent multivariate Gaussian processes.     

节省半导体测试时间成本的新方法——并发测试

半导体测试时间直接影响到整个半导体测试的成本,文章提出了一种缩短半导体测试时间的新方法——并发测试。并发测试技术可以在保证测试覆盖率的前提下显著地缩减测试时间,提高半导体测试设备硬件资源的利用率。文章分析了实现并发测试需要的先决条件,阐述了应用并发测试方法的实现流程,并给出了应用并发测试方法节省测试时间的实例。     

电玩具低功率点测试装置研究

低功率点测试是含电子电路的电玩具必须进行的安全检测项目。本文对电玩具的安全测试要求进行了简述,并对含电子电路的电玩具低功率点测试要求进行分析,对传统测试装置和现有改进测试装置比较分析与研究,得出现有改进测试装置应用前景。     

对试卷质量的常规统计分析

目前对于教学质量进行的评估,主要采取的手段是考试。而试卷的命题是否合理,则是能否真实检验学生成绩的一个重要指标,本文通过对试卷的常规指标阐述来阐明各个指标的应用方法。     

Optimal comparison of misspecified moment restriction models under a chosen measure of fit

Suppose that the econometrician is interested in comparing two misspecified moment restriction models, where the comparison is performed in terms of some chosen measure of fit. This paper is concerned with describing an optimal test of the Vuong (1989) and Rivers and Vuong (2002) type null hypothesis that the two models are equivalent under the given measure of fit (the ranking may vary for different measures). We adopt the generalized Neyman–Pearson optimality criterion, which focuses on the decay rates of the type I and II error probabilities under fixed non-local alternatives, and derive an optimal but practically infeasible test. Then, as an illustration, by considering the model comparison hypothesis defined by the weighted Euclidean norm of moment restrictions, we propose a feasible approximate test statistic to the optimal one and study its asymptotic properties. Local power properties, one-sided test, and comparison under the generalized empirical likelihood-based measure of fit are also investigated. A simulation study illustrates that our approximate test is more powerful than the Rivers–Vuong test.     

A simple test for regression specification with non-nested alternatives

In this paper, I introduce a simple test for the presence of the data-generating process among several non-nested alternatives. The test is an extension of the classical J test for non-nested regression models. I also provide a bootstrap version of the test that avoids possible size distortions inherited from the J test.