基于GIS产品的软件测试方法研究     

He Yuanyuan 《石家庄铁路工程职业技术学院学报》2006,(4)

随着信息技术的飞速发展,GIS软件产品已广泛应用于与地理坐标相关的几乎所有领域,软件的规模和复杂度都有很大的提高。因此,提高软件质量及可靠性已成为当前软件工程领域的重要任务。软件测试是保障软件质量的有效手段,面向对象软件测试是面向对象软件开发的不可缺少的一环。笔者从面向对象程序的特点出发,描述如何对GIS软件的分析和设计模型进行测试,强调将软件测试思想融合到软件开发的各个阶段。  相似文献   

The virtual anatomy laboratory: usability testing to improve an online learning resource for anatomy education     

Doubleday EG  O'Loughlin VD  Doubleday AF 《Anatomical sciences education》2011,4(6):318-326

An increasing number of instructors are seeking to provide students with online anatomy resources. Many researchers have attempted to identify associations between resource use and student learning but few studies discuss the importance of usability testing in resource design and modification. Usability testing provides information about ease of use and resource flexibility and indicates navigational issues that contribute to extraneous cognitive load for the user. An example of usability testing for modification of an online anatomy resource called the "Virtual Lab" is presented. Usability testing was used to determine whether increased content would impair navigation through the interface. Subjects with varying levels of experience with anatomy content were recruited to assess efficiency and effectiveness (defined by usability standards) of the original resource and of the redesigned resource. Comparisons between usability evaluation of the original "Virtual Lab" (OVL) and of the redesigned "Virtual Lab" (RVL) revealed that subjects were better able to successfully complete tasks using the RVL than they were with the OVL. Results also demonstrated that subjects did not take significantly more time to successfully complete tasks with the RVL. Additionally, usability testing revealed that subjects were able to successfully complete tasks using the RVL regardless of whether they possessed prior experience with anatomy content or not. Results of this study suggest that the modified resource is more effective for users. The example presented here underscores the need for usability testing prior to resource implementation and whenever significant changes are made to a resource interface.  相似文献   

“Students Get What Flows Downward”: District Leaders’ Rationalizations of the Standardized Testing of Children     

Charles Munter  Cara Haines 《The Educational forum》2019,83(2):160-180

What do students stand to gain from high-stakes, standardized testing? We consider answers to this question from the perspective of urban district leaders tasked with designing and overseeing the implementation of standardized testing policies. Results revealed variation in leaders’ framing of and rationale for standardized testing with respect to benefits for students and whether/why students should strive for high test scores. Implications for both approaches to standardized testing and broader improvement initiatives are discussed.  相似文献   

Time-Indexed Effect Size for Educational Research and Evaluation: Reinterpreting Program Effects and Achievement Gaps in K–12 Reading and Math     

Jaekyung Lee  Jeremy Finn  Xiaoyan Liu 《Journal of Experimental Education》2019,87(2):193-213

Through a synthesis of test publisher norms and national longitudinal data sets, this study provides new national norms of academic growth in K–12 reading and math to help reinterpret conventional effect sizes in time units. We propose d?, a time-indexed–effect-size metric to estimate how long it would take for an “untreated” control group to reach the treatment group outcome in terms familiar to educators—years/months of schooling. It serves as a supplement to conventional effect-size metrics, such as Cohen's d, by taking into account different amounts of time needed for learning at different ages or grade levels. Through applications to Project STAR small class effects and NAEP racial achievement gaps, we demonstrate how to interpret and use d?. It is expected to provide a more developmentally appropriate context for interpreting the size of an effect, a step toward bridging the gap between educational research and practice.  相似文献   

偏心螺旋传动试验台的研制及应用     

程时甘  黄劲枝 《顺德职业技术学院学报》2004,2(1):34-36

偏心螺旋传动试验台是一种新型的螺旋传动试验台,有其独特的传动原理、结构、试验方法及其应用。  相似文献   

软件配置测试的测试数据生成     

聂长海  徐宝文 《东南大学学报》2004,20(1):26-30

本文提出利用多次单因素试验、正交实验设计和均匀设计等常用方法为软件的配置测试产生测试数据, 以确保待测软件可以在不同的配置上正确运行, 并分析比较了这些方法的优缺点. 在此基础上提出使用两两组合覆盖方法来改善正交试验设计方法的不足、使用多因素组合覆盖方法来降低因不完全测试而带来的风险, 并提出一种单因素覆盖方法, 该方法可以产生最少的测试数据, 在覆盖各个系统因素的同时, 尽可能多地覆盖各个因素间的两两组合. 最后, 对这些测试数据生成方法从测试数据集的规模、组合覆盖率、可用性等方面进行了比较.  相似文献   

微信红包随机金额生成算法模拟及应用     

张志雄  张静之  赵春锋 《教育教学论坛》2019,(10):51-53

构造了微信红包随机金额的模拟算法,并验证了模拟算法的有效性。通过模拟算法,产生了大量微信红包随机金额数据,分析这些数据表明:(1)微信红包随机金额呈正态分布,是在红包份数较少的情况下,表现出的一种巧合,在红包份数较多的情况下,随机金额并不符合正态分布;(2)对一个微信随机红包,概率上,每个人抢到的红包金额是相等的,即抢红包的先后次序对抢到金额的多寡没有影响;(3)对一个微信随机红包,越晚产生的随机金额,其波动范围越大,即先抢红包的人,抢到平均金额的可能性比较高,后抢的人,要么抢到较小的金额,要么抢到较大的金额。  相似文献   

ITS-1三分量地震仪及在煤体动态力学参数测试上的应用     

朱国维  王怀秀  吴文金 《北京工业职业技术学院学报》2003,(3)

ITS - 1三分量地震仪是专门为恶劣环境下工程勘探而设计的 ,具有本安防爆、低功耗、高采样率和高精度等特点 ,仪器集三分量检波器于一体 ,采集数据原位数字化且原位存储 ,抗干扰能力强。文中介绍了使用该仪器配合特制震源在煤体上进行原位测试 ,利用测得的纵波、横波进行联合解析 ,求得煤体的多种动态力学参数 ,为煤炭高产高效开采提供了可靠的保障  相似文献   

从CLT与GTM的对比研究看教学法的应用趋势     

邵荣 《太原大学学报》2007,8(3):105-107

经研究分析发现,交际教学法虽然可以有效地提高学生的交际能力,语法翻译法却在提高学生的语言知识方面占有优势。可见,两者具有互补性。为了提高学生的综合语言能力,我们应该将二者有效地结合起来,并根据诸如教材类型及复杂程度等因素灵活地采用不同的方法组织教学。  相似文献   

Modeling Partial Knowledge on Multiple‐Choice Items Using Elimination Testing     

Qian Wu  Tinne De Laet  Rianne Janssen 《Journal of Educational Measurement》2019,56(2):391-414

Single‐best answers to multiple‐choice items are commonly dichotomized into correct and incorrect responses, and modeled using either a dichotomous item response theory (IRT) model or a polytomous one if differences among all response options are to be retained. The current study presents an alternative IRT‐based modeling approach to multiple‐choice items administered with the procedure of elimination testing, which asks test‐takers to eliminate all the response options they consider to be incorrect. The partial credit model is derived for the obtained responses. By extracting more information pertaining to test‐takers’ partial knowledge on the items, the proposed approach has the advantage of providing more accurate estimation of the latent ability. In addition, it may shed some light on the possible answering processes of test‐takers on the items. As an illustration, the proposed approach is applied to a classroom examination of an undergraduate course in engineering science.  相似文献