共查询到19条相似文献,搜索用时 78 毫秒
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计算机自适应考试的若干研究 总被引:2,自引:0,他引:2
本文主要介绍了什么是计算机自适应考试并简单比较了传统计算机考试和计算机自适应考试的区别,然后叙述了计算机自适应考试的考试成绩是如何获取的,最后得出结论,之所以现在世界上越来越多的考试采用计算机自适应考试是因为他有很多的优点。 相似文献
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本文针对《大学计算机基础》课程的电子考试,采用项目反应理论构建自适应考试模型,运用Browser/Server三层体系结构设计网络考试系统。以理论、技术与方法并重,详细论述了基于Web的自适应考试系统实现方法。 相似文献
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本文介绍了自适应考试的基本理论和过程,给出基于.NET框架的自适应考试系统.使用优化技术提高系统响应时间,确保系统高效性和可靠性。 相似文献
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基于项目反应理论的计算机自适应考试系统 总被引:3,自引:0,他引:3
计算机自适应考试是基于现代测验理论——项目反应理论——的一种考试方式,它具有科学化、“因材施教”等优点,本文介绍了计算机自适应考试系统的工作原理和实现方法。 相似文献
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韩琰 《电脑编程技巧与维护》2012,(12):148-150
计算机自适应考试的测试结果能更真实地反映出学生能力与水平,是今后考试系统的开发方向。主要对计算机基础课程自适应考试系统中的一些关键问题进行研究。 相似文献
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基于项目反应理论的Web考试系统的研究 总被引:3,自引:1,他引:3
详细介绍了项目反应理论,分析了项目反应理论在计算机自适应考试系统中的应用。介绍了自适应考试系统中知识库的结构和系统整体架构设计思路,重点讨论了题库设计的原理和试题选取的方法。 相似文献
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本试验对柞蚕(Antheraea pernyi)血液过氧化氢酶(Catalase,CAT)的活性进行了研究。在幼虫期,CAT活性随龄递减。同一龄期内,CAT活性在龄初时较低,然后迅速上升,在盛食期前后保持较高水平,将眠时迅速降至该龄最低点,就眠后又上升。化蛹后,CAT活性迅速升高,至蛹中期达峰值,随后下降直至羽化。不同性别间CAT活性雄性高于雌性。不同品种间CAT活性存在较大差异,抗病2号高于青6号,显著高于三里丝。接种柞蚕核型多角体病毒(Antheraea pernyi Nuclear Polyhedrosis Virus,ApNPV)后,血液CAT活性先下降,然后迅速上升,3个品种均出现两个活性峰,抗病2号的两个活性峰分别出现在接种后第3天和第6天,青6号则出现在第4天和第6天,而三里丝出现在第5天和第7天,且抗病2号的活性峰高于青6号,显著高于三里丝。研究认为,柞蚕血液CAT活性与蚕的生长发育、体内代谢、抗病性密切相关,其活性大小可作为衡量品种抗病性强弱的一个生理指标。 相似文献
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计算机辅助测试技术及其应用 总被引:1,自引:1,他引:0
计算机辅助测试 (CAT )技术是测量领域的前沿技术。文章阐述了CAT技术的发展对机械参数在线测量的影响。并运用德国的专用测量软件 ,用CAT技术对机械参数进行在线测量的例子 ,介绍了CAT技术的基本原理及其应用 相似文献
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The Callsign Acquisition Test (CAT) is a speech intelligibility test developed by the US Army Research Laboratory. The test has been used to evaluate speech transmission through various communication systems but has not been yet sufficiently standardised and validated. The aim of this study was to compare CAT and Modified Rhyme Test (MRT) performance in the presence of white noise across a range of signal-to-noise ratios (SNRs). A group of 16 normal-hearing listeners participated in the study. The speech items were presented at 65 dB(A) in the background of white noise at SNRs of -18, -15, -12, -9 and -6 dB. The results showed a strong positive association (75.14%) between the two tests, but significant differences between the CAT and MRT absolute scores in the range of investigated SNRs. Based on the data, a function to predict CAT scores based on existing MRT scores and vice versa was formulated. STATEMENT OF RELEVANCE: This work compares performance data of a common speech intelligibility test (MRT) with a new test (CAT) in the presence of white noise. The results here can be used as a part of the standardisation procedures and provide insights to the predictive capabilities of the CAT to quantify speech intelligibility communication in high-noise military environments. 相似文献
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为了提高ARM处理器对异常的管理效率和异常的响应速度,在ARM中断向量表基础上,通过集成异常仲裁电路和可控制异常处理分支,提出了高效的可控ARM异常表及其实现方法。引入三级树状结构来表示可控ARM异常表和各类异常处理路径,通过改变异常处理分支实现异常表的可控制性。详细介绍了可控ARM异常表的实体定义、接口描述和实现算法。利用FPGA开发板对可控异ARM异常表进行功能仿真调试,验证了可控ARM异常表的正确性、可靠性和可控制性。 相似文献
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The Callsign Acquisition Test (CAT) is a new speech intelligibility test developed by the Human Research and Engineering Directorate of the U.S. Army Research Laboratory (ARL-HRED). CAT uses the phonetic alphabet and digit stimuli combined together to form 126 test items.
Objective
The purpose of this study was to assess the reliability of data collected with shorter versions of CAT.Design
A total of 5 shorter versions of the original list (CAT-120, CAT-60, CAT-40, CAT-30, and CAT-24) were formed and evaluated using 19 participants. Each of the subsets of CAT was presented in pink noise at signal-to-noise ratios (SNRs) of −6 dB and −9 dB.Results
Results showed that shortened CAT lists have the capability of providing the same predictive power as the full CAT with good test-retest reliability.Conclusions
Under the experimental conditions of this study, any of the shorter versions of the CAT can be utilized in place of the full version to reduce testing times with no effect on predictive power. 相似文献17.
C.L. Alston K.L. Mengersen J.M. Thompson D. Perry 《Computational statistics & data analysis》2007,51(9):4282-4296
CAT scanning is used in longitudinal animal science experiments to assess possible changes to carcase composition induced by treatment over given time periods. A hierarchical Bayesian mixture model can be used to analyse the CAT scan data in terms of the proportion of each tissue type present in a scan. In this paper we present an extension to the hierarchical Bayesian mixture model in which estimated parameters from neighbouring CAT scans can be incorporated into the current model. These models are demonstrated using two examples. 相似文献
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XU Deng-feng 《数字社区&智能家居》2008,(33)
介绍一种基于CAT技术的视唱练耳训练系统的构思,提出一种新的视唱练耳训练方法的思路,对该CAT系统及其具体的操作思路做了阐述。 相似文献