Web应用测试模型研究

本文基于模型驱动测试的思想，提出一种Web应用测试模型WANM（Web Application Navigation Model），用于支持测试用例的设计与自动执行．基于WANM设计的测试用例的描述参照U2TP（UML2．0 Testing Profile）标准，使得测试建模、测试用例生成以及测试执行既紧密联系又相互独立，有助于提高测试的充分性与效室．     

案例教学法在电机与拖动教学中的应用研究

针对自动化专业电机与拖动专业课课堂教学中的常规教学法,提出了"案例式"教学法。相对于常规教学法中学生被动地接受教师传授的知识的缺点,"案例式"教学法能让学生主动接受教师所传授的知识,激发学生学习的积极性,同时能提高学生课堂听课效率。     

雷达软件测试用例复用技术研究

为了提高测试用例继承中缺陷发现效率,提出了一种有效的雷达软件测试用例复用模型,并将其应用到雷达软件测试用例优化设计中.根据工程实际情况,在公共测试用例库的基础上,以提高测试效率、降低测试成本为目标函数,采用蚁群算法进行用例集的寻优,给出复用用例的筛选、简化、抽象和适应性修改方法;以复用用例测试执行结果作为评估依据,持续改进和更新复用用例数据库,实现高执行率和成功率的测试用例复用.     

高中化学项目教学案例——探寻柠檬水中的维生素C

选取"维生素C"这一生活中常见的还原性物质,面向已经学习"氧化还原反应"基础知识的高一年级学生开展项目教学活动。通过提出项目问题、师生共同拆解项目问题设计研究方案和子任务、学生实施子任务研究等项目教学环节,在形成相应子任务成果的同时,进一步帮助学生巩固从氧化性和还原性视角认识化学物质性质的认识角度,建立基于物质性质定量分析目标物质含量的实验思路和思维框架,提升学生对于氧化还原反应功能和价值的认识。     

Simultaneous screening and determination eight phthalates in plastic products for food use by sonication-assisted extraction/GC-MS methods

Studies on determination of eight kinds of phthalates, e.g. di-ethyl phthalate (DEP), di-propyl phthalate (DPP), di-isobutyl phthalate (DIBP), di-butyl phthalate (DBP), benzyl butyl phthalate (BBP), di-cyclohexyl phthalate (DCHP), di-(2-ethylhexyl) phthalate (DEHP), di-octyl phthalate (DOP), in 25 kinds of plastic products for food use, including packaging bags, packaging film, containers, boxes for microwave oven use, sucking tubes, spoons, cups, plates, etc. by gas chromatography in combination with mass spectrometry detector (GC-MS) in electronic ionisation mode (EI) with selected-ion monitoring (SIM) acquisition method (GC-MS (EI-SIM)) have been carried out. Methods have been developed for both qualitative and quantitative analysis of phthalates. Extraction, clean-up and analysis procedure have been optimized. Determination of samples were performed after frozen in liquid nitrogen and sonication-assisted extraction with hexane, clean-up with LC-C18 SPE and analyzed by GC-MS methods. The base peak (m/z = 149) of all the phthalates was selected for the screening studies. The characteristic ions, 121, 177, 222 for DEP; 191, 209 for DPP; 57, 223 for DIBP; 104 for DBP; 91, 132, 206 for BBP; 55, 167 for DCHP; 113, 167, 279 for DEHP; 279 for DOP were chosen for quantitative studies. These techniques are possible to detect phthalates at the level of 10.0 μg/kg. Overall recoveries were 82-106% with R.S.D. values at 3.8-10.2%. Only one of the 25 examined samples was free from phthalates. The rest 24 samples were found to contain at least three or more of these phthalates. The predominant phthalate detected in the studied samples was DEHP.     

Cauchy problems for linear thermoelastic systems of type III in one space variable

The goal of the paper is to analyse properties of solutions for linear thermoelastic systems of type III in one space variable. Our approach does not use energy methods, it bases on a special diagonalization procedure which is different in different parts of the phase space. This procedure allows to derive explicit representations of solutions. These representations help to prove results for well‐posedness of the Cauchy problem, L^P–L^q decay estimates on the conjugate line and results for propagation of singularities. Copyright © 2005 John Wiley & Sons, Ltd.     

基于组合混沌遗传算法的最小测试用例集生成

最小测试用例集生成是软件测试的重要研究领域之一.将具有均匀分布特性的Chebyshev和Logistic混沌映射相结合的混沌序列引入遗传算法的选择、交叉和变异操作,并在遗传测试用例选择方法中添加混沌扰动,实现全局最优,以解决遗传算法用于测试用例集约简时局部搜索能力弱、易早熟收敛等问题.在随机生成的测试用例需求对应关系及Siemens测试套件等实例上进行了实验研究,并与现有的经典方法在测试用例集生成规模和算法执行时间上进行了比较,实验结果表明,在保持算法执行时间的基础上,在遗传测试用例方法中引入混沌映射有助于生成规模更小的测试用例集.     

Should I scan my face? The influence of perceived value and trust on Chinese users’ intention to use facial recognition payment

While China has seen the widespread adoption of facial recognition payment, concerns over the potential risks impede the further growth of user acceptance. Drawing on the perspectives of perceived value and trust, we developed a research model to explore how the Chinese users’ trade-off between perceived benefits (perceived convenience and perceived novelty) and perceived risks (perceived privacy risk and perceived financial risk) influences their usage intention. Based on survey data from 1,200 Chinese mobile payment users, this study uses structural equation modeling to examine the hypotheses. Our results show that perceived convenience positively influences perceived value, while privacy risk and financial risk negatively influence perceived value and trust. Although perceived novelty has no significant effect on perceived value and trust, perceived value positively influences trust, and both of them have a positive effect on the intention to use. Furthermore, our moderation analysis indicates that the influence of perceived value on the intention to use is stronger among users who consider facial information to be more sensitive. The theoretical implications for research as well as the practical implications for practitioners are also discussed.     

Web网站功能及性能测试探析

目前,测试应用正处在新的发展时期,众多软件企业已开始重视测试这个环节。现分析Web网站测试要点,着重介绍了如何设计黑盒测试用例用于网站功能测试,并提出了网站性能测试方案。结果表明,测试方案符合网站实际测试要求。