《大学生主观幸福感问卷》的编制     

姜永杰  杨治良 《湖南师范大学教育科学学报》2008,7(6)

过去国内对主观幸福感(包括大学生)的研究更多是直接引用或修订国外编制的问卷或量表.所以引用过程中民族个性差异,人口统计量的差异,文化差异以及翻译等额外变量使得研究结论的准确性受到质疑,所以编制适用于中国大学生特点的问卷对主观幸福感的本土化研究有着重要意义.  相似文献   

机械零部件的可靠性设计分析     

张小勤  莫才颂 《茂名学院学报》2008,18(1):28-31

可靠性设计已广泛应用于机械零件设计.分析了机械零部件传统设计方法与可靠性设计方法在设计思想、设计原理上的区别,介绍了机械零件强度设计的应力-强度干涉理论,讨论了机械零件强度可靠度计算的一般表达式,并给出了机械零件可靠度设计的工程实例分析.通过实例设计结果的分析比较,说明可靠性设计的可行性与实用性.  相似文献   

测试员评分对普通话水平测试信度和效度的影响     

周秋莲  邓华 《黄石理工学院学报(人文社科版)》2008,25(3)

能否保证普通话水平测试的信度和效度,直接关系到测试工作的成败。文章就测试员评分对普通话水平测试信度和效度的影响进行了探讨,并提出了保证普通话水平测试信度和效度的具体措施。  相似文献   

Hewitt多维完美主义量表在1959名大学生中的试用与修订     

周奇志  宋广文  李建伟 《黑龙江教育学院学报》2008,27(2):75-77

为测试Hewitt多维完美主义量表在中国大学生中的信度和效度,并对其进行修订,对1959名大学生进行测试,采用探索性和验证性因素分析对问卷的因素进行检验,计算量表的内部一致性信度、重测信度等。结果发现量表最后保留15个项目,可解释总方差的49．55％,各维度的项目载荷在0．49～0．77之间。验证性因素分析指标x2、RMSEA、NFI、CFI、CFI分别为796．925、0．075、0．802、0．820、0．835。总量表与分量表的a系数和重测信度都在O．65以上,因此,修订后的HMPS具有较理想的信效度,较适合中国大学生使用。  相似文献   

Reliability-based research for failure risks of ship hull girder     

Liao Guohong  Zeng Guangwu Yang Kailun 《东南大学学报》2008,(Z1)

In order to find a simple and programmed method to analyze the reliability of hull beams when fatigue and corrosion act on ships, the stress of ships is to be calculated in compliance with the longitudinal bending and cross-section modulus of ship beams. The calculation value of stress is to be compared with the allowable stress in order to gain the actual ship load and margin of safety, and then assess the reliability and failure probability of ship beams. The longitudinal bending moment is a random variable; the fatigue and cauterization are also random variables; and as the ship is influenced by cumulative damage of fatigue and cauterization, the cross-section modulus is a time-varying random variable. The reliability and failure probabilities can be actually reflected through the reliability analysis method. The analysis results indicate that in the service time of ships, as the age of ship increases and the fatigue and corrosion effects accumulate, the reliability of ship beams decreases and the failure probability increases, especially after 15 to 20 years.  相似文献   

Peer assessment in thesis oral presentation     

Jong-Leng Liow 《European Journal of Engineering Education》2008,33(5-6):525-537

Peer assessment has been studied in various situations and actively pursued as a means by which students are given more control over their learning and assessment achievement. This study investigated the reliability of staff and student assessments in two oral presentations with limited feedback for a school-based thesis course in engineering where the different disciplines ran their own assessment. Staff scores were generally found to be more reliable than student scores, but it was not consistent. The engineering disciplines displayed widely varying differences between the staff and student scores. A large variation in reliability was found for the different disciplines making it difficult to reconcile to a standard school-based overall grading scheme for the course when the reliability of marking was low. The results also showed that the average scores for oral presentations are generally much higher than for written examinations, based on the grade point average. Future research will need to investigate how best to develop a consistent assessment framework for oral presentations and moderation of scores for consistency, particularly for large classes where assessment are done by different groups of staff and students and collated into a single set of marks for the class.  相似文献   

Web应用服务器的技术探讨   总被引：4，自引：0，他引：4  

魏文国 《广东技术师范学院学报》2003,(4):4-8

本文简述了Web应用服务器的发展历史及两大主要的Web应用开发平台：J2EE和．NET．分析并比较三种主流的Web应用服务器：WebSphere，WebLogic和Oracle9iAS．阐述Web应用服务器存在的主要问题以及对Web应用服务器可靠性的要求．  相似文献   

罪刑法定的明确性与口袋条款的合宪性审查     

张遂  雷建国 《哈尔滨学院学报》2008,29(8):28-31

刑法是直接以限制或者剥夺公民个人的自由与权利的法律,因此刑法的行使必须遵循罪刑法定原则。罪刑法定原则一经提出,就被上升为宪法的高度,在大多数国家的宪法原则中予以确认。罪刑法定原则要求刑法规范必须明确,“不明确即无效”。按照罪刑法定原则的要求,刑法中的口袋条款没有明确性,违背人权保障的宪政精义。  相似文献   

一个基于基因表达式编程的软件可靠性评测系统     

朱盈贤 《重庆第二师范学院学报》2008,21(6):70-73

本文利用数据挖掘领域的基因表达式编程算法,对软件失效数据进行数据挖掘,得出失效表达式,从而对软件的可靠性程度进行评价或预测。实验证明：该软件评测系统具有较高的预测精度。  相似文献   

A Simple Model to Determine the Efficient Duration of Exams     

Jules L. Ellis 《Educational and psychological measurement》2021,81(3):549

This study develops a theoretical model for the costs of an exam as a function of its duration. Two kind of costs are distinguished: (1) the costs of measurement errors and (2) the costs of the measurement. Both costs are expressed in time of the student. Based on a classical test theory model, enriched with assumptions on the context, the costs of the exam can be expressed as a function of various parameters, including the duration of the exam. It is shown that these costs can be minimized in time. Applied in a real example with reliability .80, the outcome is that the optimal exam time would be much shorter and would have reliability .675. The consequences of the model are investigated and discussed. One of the consequences is that optimal exam duration depends on the study load of the course, all other things being equal. It is argued that it is worthwhile to investigate empirically how much time students spend on preparing for resits. Six variants of the model are distinguished, which differ in their weights of the errors and in the way grades affect how much time students study for the resit.  相似文献