2PLM下CAT选题策略比较

本文在两参数逻辑斯蒂克模型（2PLM）下,提出一种新的选题策略——平均测验难度匹配法（Avt—b）,并对四种选题策略下EAP能力估计趋势进行比较研究。通过模拟研究显示,Avt—b方法在CAT前期能够较快地锁定能力范围,较准确地作出能力估计。本文对CAT测试阶段的能力误差范围进行确定,对于多级评分模型的CAT选题策略开发具有一定的借鉴意义。     

面向模具产品开发的PLM系统的应用

在面向模具产品开发中,全生命周期管理系统可以分为发生在企业内和企业外两部分,对于发生在企业内的数据一般可以通过对企业内部的管理共享,对于发生在企业外的数据,需要通过一定的方法获得(如调查)。通过对全生命周期在我国模具行业发展的现状、可行性的分析,给出了全生命周期管理系统实施的可行的方法途径和框架途径,为全生命周期管理系统应用于企业的可视化模型研究打下了基础。     

Information Functions of Rank-2PL Models for Forced-Choice Questionnaires

This paper presents the item and test information functions of the Rank two-parameter logistic models (Rank-2PLM) for items with two (pair) and three (triplet) statements in forced-choice questionnaires. The Rank-2PLM model for pairs is the MUPP-2PLM (Multi-Unidimensional Pairwise Preference) and, for triplets, is the Triplet-2PLM. Fisher's information and directional information are described, and the test information for Maximum Likelihood (ML), Maximum A Posterior (MAP), and Expected A Posterior (EAP) trait score estimates is distinguished. Expected item/test information indexes at various levels are proposed and plotted to provide diagnostic information on items and tests. The expected test information indexes for EAP scores may be difficult to compute due to a typical test's vast number of item response patterns. The relationships of item/test information with discrimination parameters of statements, standard error, and reliability estimates of trait score estimates are discussed and demonstrated using real data. Practical suggestions for checking the various expected item/test information indexes and plots are provided.     

基于2PLM项目参数估计的病态矩阵控制

病态矩阵是IRT理论中项目参数估计必然面对的问题．本文以2PLM参数估计为例．推导出参数估计迭代公式，系统阐述了三种病态控制方法的原理及在编程中数据处理的技巧。     

基于CAXA PLM的数字化教学平台建设与实践教学应用

介绍了以我国自主研发的CAXA PLM为基础建立数字化协同设计制造教学平台的建设模式,以及借助该教学平台实施基于工作过程的模拟真实企业岗位角色的实践训练模式.     

Technological self-efficacy among school leaders in Oman: A preliminary study

There is more need today for school leaders to be up-to-date with technology and its various uses in education. Enhancing self-efficacy in the use of technologyis an expected role of educational leadership preparation programmes. This study investigated technological self-efficacy of a group of educators in leadership positions while participating in a leadership preparation programme at Sultan Qaboos University in Oman. The findings show that these educators had high technological self-efficacy. There were also significant, positive relationships between technological self-efficacy variables, academic achievement and age. Age was negatively correlated with general learning self-efficacy and also with one indicator of academic achievement. In the qualitative analysis, the study used the framework of the Theory of Margin (TM) to identify the factors affecting technology self-efficacy. Results indicate that, while participants with a high power-load margin (PLM) reported a higher number of internal and external powers, those with a lower PLM reported a higher number of internal and external loads.     

Logistic模型中参数估计及其模拟研究

本文在文献[1]提出Logistic模型参数近似估计的基础上,根据被试能力参数的不同情况得到两参数和三参数模型的参数估计新方法,新方法的特点是计算简单而不失精度,蒙特卡洛模拟表明新方法是一种快速而有效的算法。     

产品生命周期管理的数字化工厂实验系统建设探索

作为一门应用型学科,IE专业必须重视面向PLM的DF实验系统的建设,以强化学生的系统实践和综合应用能力,培养适应数字化制造需求的专业工程人才.基于DF的实践应用需求,提出了面向PLM的DF实验系统的建设目标;基于此目标,结合温州区域产业集群发展要求,提出了温州大学DF实验系统的建设方案,并讨论了相关的实践教学开发与设计,为培养适应性IE人才提供一些参考.     

DS1302在单片机系统中的应用

讨论了实时时钟／日历芯片DS1302在单片机系统中的应用．以英特尔80C196单片机为例，给出了硬件接口电路和PLM语言编写的读写驱动程序．这些程序已通过验证并应用到电力系统监控终端中．该方法占用CPU硬件资源少，软件设计简单。     

基于PLM系列软件的机械类课程教学改革与实践

针对近年来高校毕业生的就业困难问题,在充分了解相关行业用人需求以及现阶段学生的学习状况、能力水平和求职预期的基础上,以市场为导向,以提高学生的竞争能力和就业水平为目的,立足于自身办学条件,摸索出一套适合我校机械类专业的教学方法。强调学以致用,紧紧围绕学生兴趣、教师教学积极性和职业规划等,展开教学活动,课堂教学中及早注入“职业规划”的理念。以PLM类系列软件的教学和训练为主要手段,以近期的典型工程案例为教学内容,引导学生进行初步的工程设计进而完成实物的制作,借以培养学生兴趣并强化其“职业意识”,帮助学生逐步确立职业目标并最终实现其职业理想,在一定程度上缓解了学校的就业压力,实现了教学目标。