The capability maturity model and CASE

Abstract. Many software organizations face serious problems in their attempts to make expectations and realities meet in introducing CASE technology. One promising approach to understanding CASE introduction better and to managing it more effectively has been developed by relating CASE introduction to the Capability Maturity Model (CMM). This paper reviews software process maturity as a framework for CASE introduction. The relevance of the framework is discussed and three critical questions are explored: 1) What is the role of organizational experiments in CASE introduction? 2) How do the functional characteristics of CASE technology influence CASE introduction? and 3) How does the organizational context influence CASE introduction? The aim of the paper, by way of this discussion, is to explicate the strengths and limits of software process maturity as a framework for CASE introduction, and to identify the most important supplementary issues     

C程序设计课堂导入环节分析与设计

课堂导入环节是调动学生听课积极性和学习主动性的关键环节。文章通过对课堂导入环节的作用及相关教学实例的分析,总结出课堂导入环节的三条设计原则。     

几何参数对螺栓连接载荷导入系数的影响研究

载荷导入系数与被连接件的几何尺寸和外载荷有关,当被连接件结合面上有效夹紧接触区域的接触状态不随外载荷的变化而变化时,系数仅与几何尺寸有关。为了研究螺栓连接的几何参数对载荷导入系数的影响,以四个无量纲化几何参数为研究对象,采用控制变量法进行仿真分析。研究结果表明,被连接件宽高比与外载荷作用相对高度对载荷导入系数有影响,不同几何尺寸的螺栓连接结构,可以由拟合公式或拟合曲线计算对应的载荷导入系数,为实际工程运用提供了一定的借鉴意义。     

The List Introduction Strategy for the Derivation of Logic Programs

We present a new program transformation strategy based on the introduction of lists. This strategy is an extension of the tupling strategy which is based on the introduction of tuples of fixed length. The list introduction strategy overcomes some of the limitations of the tupling strategy and, in particular, it makes it possible to transform general recursive programs into linear recursive ones also in cases when this transformation cannot be performed by the tupling strategy. The linear recursive programs we derive by applying the list introduction strategy have in most cases very good time and space performance because they avoid repeated evaluations of goals and unnecessary constructions of data structures. Received December 2000 / Accepted in revised form January 2002     

Delphi连接数据库的两种数据引擎——BDE和ADO

BDE和ADO是Delphi应用程序连接数据库的两种数据引擎,这里详细介绍了用BDE和ADO连接数据库的原理和方法。     

应用层组播的研究与算法实现

引入了组播的概念,并对传统的口组播作了一个简要的概述及总结归纳.然后引入应用层组播的概念,并对应用层组播的研究现状和主要的研究方法进行了详细的介绍和评述.特别是对应用层组播中所使用的几个关键技术和在该领域中所经常采用的一些算法,进行了深入的探讨和细致的总结.同时也介绍了目前在应用层组播研究领域中所遇到的几个主要问题,比如流量控制和拥塞控制,并提出了相应的解决方案.在介绍应用层组播的同时,与传统的IP层组播进行了比较,给出了两者之间存在的差别.最后,提出了一套对应用层组播算法进行评价的评估体系.     

浅谈BIOS与CMOS的区别和联系

本文主要介绍BIOS和CMOS两个概念的基本内容,并详细介绍BIOS的四大功能模块,避免混淆两个重要计算机术语.     

浅谈BIOS与CMOS的区别和联系

本文主要介绍BIOS和CMOS两个概念的基本内容,并详细介绍BIOS的四大功能模块,避免混淆两个重要计算机术语。     

Software Evolution and the Code Fault Introduction Process

In any manufacturing environment, the fault introduction rate might be considered one of the most meaningful criterion to evaluate the goodness of the development process. In many investigations, the estimates of such a rate are often oversimplified or misunderstood generating unrealistic expectations on the prediction power of regression models with a fault criterion. The computation of fault introduction rates in software development requires accurate and consistent measurement, which translates into demanding parallel efforts for the development organization. This paper presents the techniques and mechanisms that can be implemented in a software development organization to provide a consistent method of anticipating fault content and structural evolution across multiple projects over time. The initial estimates of fault introduction rates can serve as a baseline against which future projects can be compared to determine whether progress is being made in reducing the fault introduction rate, and to identify those development techniques that seem to provide the greatest reduction.     

用PB实现服装工艺辅助设计

介绍服装工艺设计的现状及PowerBuilder。介绍用PB 数据库实现工艺辅助设计的原理和应用。     

台湾土壤概要和土壤学研究特点

通过对台湾地区的访问和学术交流 ,作者概述了台湾土壤 ,介绍了台湾土壤研究的特点 ,并作了两岸土壤学术语的参比     

用PB实现服装工艺辅助设计

介绍服装工艺设计的现状及PowerBuilder。介绍用PB＋数据库实现工艺辅助设计的原理和应用。     

一个基于JIDM规范的CORBA/SNMP网关设计与实现

简介了ＪＩＤＭ规范，详细讨论了ＣＯＲＢＡ／ＳＭＰ网关的设计和实现，并展望了进一步的研究方向。     

士官院校《军队信息安全保密概论》课程教学研究

《军队信息安全保密概论》课程在士官教育中开展,旨在提高军队士官学员的保密意识,为了有效提高在校士官学员的安全保密素质,作者在该课程的讲授中引入案例式教学方法。从案例内容介绍,到泄密原因分析与归纳,最后总结案例要点,使学员参与到其中,实践表明,该方法有效提高了在校士官学员的保密安全保密素质,达到了预期教学目的。     

基于网页监控与保护的安全数据库系统

从SQL Server 2000内置的安全机制着手,在简单介绍了网页监控和保护系统基本组成的基础上,重点介绍了能够对动态网页数据库进行监控和保护的安全数据库系统。     

Transdimensional approximate Bayesian computation for inference on invasive species models with latent variables of unknown dimension

Accurate information on patterns of introduction and spread of non-native species is essential for making predictions and management decisions. In many cases, estimating unknown rates of introduction and spread from observed data requires evaluating intractable variable-dimensional integrals. In general, inference on the large class of models containing latent variables of large or variable dimension precludes the use of exact sampling techniques. Approximate Bayesian computation (ABC) methods provide an alternative to exact sampling but rely on inefficient conditional simulation of the latent variables. To accomplish this task efficiently, a new transdimensional Monte Carlo sampler is developed for approximate Bayesian model inference and used to estimate rates of introduction and spread for the non-native earthworm species Dendrobaena octaedra (Savigny) along roads in the boreal forest of northern Alberta. Using low and high estimates of introduction and spread rates, the extent of earthworm invasions in northeastern Alberta is simulated to project the proportion of suitable habitat invaded in the year following data collection.     

移动IPv6的安全性研究

移动IPv6由于其移动性的特点而引入了一系列的安全问题。本文首先对移动IPv6做了简单介绍,然后研究了移动IPv6的安全机制,最后分析了移动IPv6面临的各种安全问题并提出了相应的对策。     

A three-year longitudinal assessment of changes in office activities following the introduction of microcomputers into a multinational bank

A longitudinal assessment of the introduction of new office technologies into a multinational bank was conducted using both task diaries and semi-structured interviews. Task diaries were administered prior to the introduction of microcomputers, several months after the introduction and several years later. Semi-structured interviews were completed after the second task diary. The assessment provides evidence of how offices adapt to changing electronic tookits. The asssessment provides ergonomists with a usable list of taks activities and the effects on task variability of the adoption of microcomputers into the work routine. It shows that when support staff are asked to use a new computer they must choose what other tasks to cut back on, which has consequences for the overall work process. Overtime increased 170% after the introduction of the computer. In a culture where professional staff have high expectations of support staff this has consequences for working relationships in terms of perceptions of the computer's utility. Support staff and professional staff differ in perceptions of control, time-saving and ability to make corrections. The assessment demonstrates the importance of multiple measurement instruments in tracking the effects of technological change on the work process. In conclusion, it is noted that the introduction of new technologies into the office must be considered in the broader office context to avoid the unintended consequences often reported in other case studies.     

用Struts框架建立Java Web应用程序

简要介绍MVC设计模式和Struts工作原理,并结合实例讲述运用Struts框架进行Web应用程序开发的方法和过程,最后说明运用Struts框架进行开发可以提高开发效率和软件的质量。     

多元数据携带工具RDF的探讨

元数据的使用对网络信息约组织、挖掘、检索和利用十分有益,RDF的引入使得多种元数据共荣共存.本文通过介绍元数据、RDF的一些基本概念与RDF数据模型,描述了RDF应用的广阔前景.