Selecting significant effects in factorial designs: Lenth's method versus using negligible interactions

Among the many analytical techniques that have been published to analyze the significance of the effects in the absence of replications, two have emerged as the most widely used in text books as well as statistical software packages: The Lenth's method and the estimation of the variance of the effects from the values of those considered negligible. This article shows that neither is better than the other in all cases, and by analyzing the results obtained in a wide variety of situations it provides guidelines on when it is preferable to use one or the other technique.     

A Knowledge Based System for Assisting in Differential Diagnosis of Chemically Dependent/Mentally Ill Patients

Summary

This paper discusses the use of Knowledge Base 2.1, a computer program that administers a response dependent, structured interview to evaluate the presence of psychiatric disorders within the chemical dependency treatment setting. The writer reviews the problems commonly encountered when conducting clinical interviews, psychometric examinations and differentially diagnosing psychiatric disorders within this special population. Knowledge Base 2.1 utilizes combined computer techniques of rule driven logic, pattern matching, and an original algorithm that accomplishes a “real time retandardization” of the complete database. With each administration, standardization is implemented in an effort to adequately consider the effects of chemical dependency on psychological test performance and normative information regarding symptoms. Knowledge Base 2.1 also functions as a research tool inasmuch as all patient responses to this structured interview are permanently stored in computer files for ongoing analysis.     

Using QSR‐NVivo to facilitate the development of a grounded theory project: an account of a worked example

This paper demonstrates how the software package QSR‐NVivo can be used to faciitate a grounded theory approach. Recent research evidence has questioned the methodological quality of many studies that claim to utilise grounded theory. This paper argues that qualitative data analysis software can be used to encourage good quality grounded theory research by facilitating many of the key processes and characteristics associated with this approach. To achieve this, the paper identifies a number of grounded theory characteristics, common to all revisions of the methodology. It then describes the development of a recent study, which examined how people successfully maintain long‐term physical activity behaviour change. The purpose of this is to demonstrate how different functions of QSR‐NVivo may be used in conjunction with the key grounded theory characteristics. In summary, QSR‐NVivo is a powerful tool that, if used appropriately, can facilitate many aspects of the grounded theory process from the design and early sampling procedures, through to the analysis of data, theoretical development and presentation of findings.     

基于网络的“链”式教学模式探索与实践

针对软件平台类课程的特点,阐述了实施＂链＂式教学模式的目标及改革的必要性,给出了该模式的组成要素及具体的实施方案。并以J2EE平台等三门同类课程为试点,采取＂即讲即练＂的教学方法,提高了学生的软件工程能力和实践动手能力,是一种以工程能力为核心的教学理念。     

中国软件企业过程改进的“制度化”:以东软集团实施CMMI为例

通过对东软集团股份有限公司实施CMMI的实地调查和案例研究,探讨该公司实施CMMI提高软件过程能力的背景和绩效,揭示中国软件企业过程改进的"制度化"体系。研究结果表明,该公司引进CMMI模式改进软件过程,使软件生产已经成为"制度化的过程"以及一个习惯性遵循和使用规则的过程。CMMI为中国软件企业走向规范化、规模化、成熟化起到了重大的促进和导向作用。     

可拆装式湿法剪切粉碎设备结构设计与转子系统动态分析

为解决工业化生产中大量韧性湿物料粉碎难度大、粉碎部件磨损严重的难题,对大功率湿法剪切粉碎设备的关键部件进行结构设计与优化,将定转子优化为可装拆式结构。通过工程软件ANSYS对转子进行变形分析与模态分析,分析其高速转子系统的振动特征,为关键部件的结构设计与优化提供理论依据,为整机的动态稳定性分析奠定基础。     

基于UG的通用凸轮曲线二次开发技术

凸轮曲线是凸轮驱动从动件的运动曲线,它影响到凸轮机构的效率、精度以及寿命,故在凸轮设计中十分重要。为快速有效地进行凸轮机构设计,[HTH]总结推导了通用凸轮曲线公式,综合应用Visual C++6.0、UG/OPEN MenuScript、UG/OPEN UIStyler和UG/OPEN API等开发工具,开发了基于UG软件的通用凸轮设计模块,提高了凸轮机构设计效率。     

模具虚拟实验室的研究与开发

针对传统模具培训资源存在的问题,提出了模具虚拟实验室的构想。主体功能包括模具结构认知、拆装实训和运动仿真3大模块,其中的特色功能有：模具知识立体词典、查看标准部件、自主拆装、实训考核等。基于在模具设计和分析方面广泛应用的UG软件,开发了模具教学虚拟实验室,实现了交互式的实训和知识关联,可广泛应用于模具人才培训,以及模具企业知识管理。     

不对称信息下信息技术服务外包合同设计

本文针对客户企业向IT供应商外包信息技术服务这一背景,考虑IT供应商不仅具有开发信息系统能力的私有信息,且其开发过程中的努力行为对于客户企业不可见的情况,研究了客户企业信息技术服务外包合同设计问题。研究发现,不对称信息下,客户企业可以通过设计最优合同菜单来甄别不同能力的IT供应商,但是此时客户企业需要向高能力IT供应商支付信息租金。同时,客户企业可以通过设计最优合同有效规制高能力IT供应商系统开发过程中的努力行为,但是相比于信息对称的情况,不对称信息下低能力IT供应商会存在努力不足的现象。低能力IT供应商努力不足的现象会降低社会福利和客户企业的期望利润;客户企业向高能力IT供应商支付信息租金的行为也会减少客户企业的期望利润。增加系统调试阶段的调试时间或者选择信息系统故障检出率高的IT供应商,可以降低高能力IT供应商的信息租金,并缓解低能力IT供应商努力不足的现象,进而减少信息不对称给客户企业带来的利润损失。     

我国管理型会计软件功能设计研究

核算型会计软件存在保存数据不全 ,重核算轻分析和核算与业务分离以及不易审计的局限性。急需研究开发管理型会计软件 ,管理型会计软件应实现核算、分析、控制一体化和会计核算与业务管理的协调 ,并尽量满足审计的要求 ,使我国会计软件上一个新台阶。