Making reuse pay: the SIDPERS-3 RAPID Center

The US Army Information Systems Engineering Command (ISEC), which develops and maintains Standard Army Multicommand Information Systems (STAMIS), asked the author's company to examine the feasibility of the RAPID software library concept, to assess the potential for software reuse in traditional MIS applications. (RAPID is an acronym for Reusable Ada Packages for Information system Development.) The author summarizes the findings of this work, and discusses the RAPID Center, which is currently being developed to support ISEC's software reuse program and to apply the results from the RAPID investigation. The SIDPERS-3, the third and latest version of the US Army's Standard Installation/Division Personnel System, serves as a testbed for the RAPID Center and related issues of software reusability     

基于同态的软件重用技术度量

针对现有重用技术不便于解决的重用问题，采用基于同态的重用技术，研究了问题表示的同态重用。在此基础上提出一种同态重用度的概念，通过计算同态重用度的方法，人们可以在编写程序前就对已有程序的重用程度给出评价，从而有目的有选择地进行软件重用，这样就能比较系统、广泛地在软件开发中应用重用技术。     

C＋＋语言的软件复用机制

软件复用是程序开发过程中最重要的技术之一,通过软件复用可以达到事半功倍的效果。以面向对象语言C＋＋为例,针对C＋＋语言的继承和多态的特性,分别介绍了基于类库的软件复用、基于继承的软件复用、基于多态的软件复用和基于模版的软件复用四种软件复用机制。从不同的角度用图和程序两种方法说明了每种复用机制的适用情况,结合教学实践,并用实例加以验证。     

C＋＋语言的软件复用机制

软件复用是程序开发过程中最重要的技术之一,通过软件复用可以达到事半功倍的效果。在此以面向对象语言C＋＋为例,针对C＋＋语言的继承和多态的特性,分别介绍了基于类库的软件复用、基于继承的软件复用、基于多态的软件复用和基于模版的软件复用4种软件复用机制。从不同的角度用图和程序2种方法说明了每种复用机制的适用情况,结合教学实践,并用实例加以验证。     

软件重用技术在C++中的实现

主要介绍了软件重用技术,结合教学实践,讨论了在C 语言中实现基于程序的软件重用和基于类的软件重用的途径.对于软件开发和课程整合具有一定的实践意义.     

基于Struts框架的业务逻辑复用的研究与应用

Struts是基于MVC模式的一种成熟的Web开发框架,它合理地将表示逻辑、业务逻辑和控制逻辑分离,使得开发过程变得简洁清晰。但是程序员运用Struts开发程序时,对于某一个具体领域业务逻辑代码每次都要从头编写,特别是功能相同、结构独立的模块得不到很好的复用。本文通过分析Struts的处理流程并运用软件复用技术提出了特定领域的业务模块与Struts框架的集成方案,实现Struts框架在架构和业务的双重复用。     

Model-Year Architectures for Rapid Prototyping

The Rapid Prototyping of Application-Specific Signal Processors (RASSP) program is changing the way engineers design embedded signal processors by providing a process that will reduce by at least a factor of four both the time-to-market and cost, and improve design quality. To achieve these improvements, Lockheed Martin's Advanced Technology Laboratories (ATL) is using a methodology that stresses hardware and software reuse, and model-year architectures that enable interoperability and upgrades through open interface standards. This paper describes ATL's model-year architecture, which defines a framework for reuse to enable low-cost technology upgrades for embedded processors. This approach can be applied to a wide range of military and commercial applications.     

农村广播电视台如何架构媒体资产管理网络

为了使城乡统筹发展数字广播电视,必须架构适应农村广播电视台需求的媒体资产管理网络系统,以实现数字节目的制作、存储、资源管理与播出一体化,采用消息＋WebService实现综合信息管理系统,进行无缝连接,可充分利用媒体资产,使节目的生产与资源再利用的效益达到最大化。     

CTUNING： A REUSE DISTANCE BASED CACHE PERFORMANCE TUNING TOOL

Cache performance tuning tools are conducive to develop program with good locality and fully use cache to decrease the influence caused by speed gap between processor and memory. This paper introduces the design and implementation of a cache performance tuning tool named CTuning, which employs a source level instrumentation method to gather program data access information, and uses a limited reuse distance model to analyze cache behavior. Experiments on 183.equake improve average performance more than 6% an...     

基于模型-视图-控制器的Web应用程序框架设计

根据模型-视图-控制器（MVC）设计模式，提出一个web应用程序开发框架，该框架可简化web应用程序的开发，便于web页面和业务逻辑的修改和复用，增加应用程序的灵活性和可扩展性。最后以一个汽车4S店配件采购订单模块为例，验证了这种开发框架的作用。     

企业MIS的集成和统一用户接口的实现

提供了实现企业MIS集成和统一用户接口所需的主要技术：包括适应动态权限调整的菜单授权和身份切换技术、简捷方便的授权接口设计，以及提高工程进度、程序质量、软件重用性和统一用户接口界面的窗口菜单继承机制。     

基于FPGA的SPI Flash控制器的设计与实现

传统的Flash读写是通过CPU软件编程实现,其读写速度较慢,且占用CPU资源,另外由于Flash芯片本身功能指令较多,使得对芯片进行直接操作变得非常困难。本文提出一个基于FPGA的SPI Flash读写硬件实现方案,该方案利用硬件对SPI Flash进行控制,能够非常方便地完成Flash的读写、擦除、刷新及预充电等操作,同时编写的SPI Flash控制器IP核能够进行移植和复用,作为SOC芯片的功能模块。SPI Flash控制器采用VHDL语言进行编写,在Modelsim 6.5g上通过功能仿真,并且在XUPV5-LX110T FPGA开发板上通过硬件测试,实现结果表明方案的可行性。     

基于代理的程序挖掘系统的设计与实现

随着Internet和软件复用技术的发展,用户根据自己的计算需求,从网上构件库中搜索构件,并由构件动态生成程序成为可能.针对这种按需计算的需求,本文提出一种在网络环境下进行程序挖掘的方法:采用智能代理分析理解用户的计算需求,从网上构件库中识别、搜索可用构件,并组装链接,形成满足用户要求的可执行程序.文中论述了程序挖掘的基本概念、基于代理的程序挖掘原型系统,并讨论了进一步的研究方向.     

Integrated Procedure Automating Test Chip Layout, Place and Route, and Test Plan Development for Efficient Parametric Device and Process Design

This work describes a novel system for device development that automates and fully integrates the workflow from test chip construction, from placement and routing to electrical test program generation. In addition to accelerating test chip and test program development, this system facilitates parameterized data analysis, thereby providing a framework that finally allows the user to realize the full benefits of complex and elegant experimental device designs. By utilizing a centralized database and eliminating parameter re-entry, the automation provided by this integrated approach eliminates many of the sources for human error while maximizing reuse between technologies.      

一种红外数字场景生成技术

在基于数字微镜器件(Digital Micromirror Device, DMD)的红外景象仿真系统中,需要 提供红外场景数字信号作为用于调制和控制DMD的输入源。为满足此项需求,提出了 一种通用的红外数字场景生成方法。首先介绍了利用计算机生成基于Vega的红外 模拟场景的流程,然后详细论述了开发红外场景驱动控制程序与格式转换程序的 设计过程。该方法不仅可以将Vega红外场景转换为静态BMP格式图像和动态AVI格式视频等 数字信号,而且还可以提高红外仿真场景应用的重用性和可移植 性,因此具有很大的工程实用价值。     

Propagation experiments at 11/14 GHz as part of the European communications satellite program

A Comprehensive program of propagation measurements is being carried out in Europe in connection with the planning of a regional satellite communication system for operation at 11/14 GHz. Statistics of atmospheric attenuation are collected by means of static radiometers and the feasibiity of frequency reuse techniques by polarization discrimination is investigated on several point-to-point links using both linear and circular polarizations. The results obtained so far are outlined and the use that is made of them in designing satellite systems is discussed.     

时间同步协议在远程视频监控系统中的实现

为了使远程视频监控系统能够同步到一个标准时间上,采用了NTP网络对时协议,NTP协议以UTC时间作为时间源,进行层层对准,其毫秒级精度足以满足视频监控系统的需求。作者针对导航台站远程视频监控系统,设计了本文的时间同步方案,该方案利用现有网络资源,最大程度减少了成本的投入,最后作者进行了实验测试,证明了该方案的可行性,在实际使用中,该方案可以有效的满足导航设备的远程视频监控系统对于时间同步的需求。     

广播发射台站远程监控系统设计(二)——串口复用器设计

设计了一种基于STC12C5608单片机和VK3234芯片的异步串口扩展系统.对主串口进行串口扩展,扩出4个子串口,实现多路串口数据的复用数据传输,解决串口不足的问题.单片机程序采用Keil C51编写,修改移植极其方便.在实际应用中,该串口扩展系统性能稳定可靠,满足需求.由于采用了SPI接口方式的串口扩展技术,因此根...     

Incorporating component reuse, remanufacture, and recycle into product portfolio design

Product take-back laws have been enacted in the Netherlands, and the European Commission is expected to follow suit. The legislation mandates that manufacturers bear the economic burden of collection and disposal of products at the end of their useful lives. Reuse or remanufacturing of some components might be more cost-effective than disposal and provide an opportunity for recovery of their economic value. However, manufacturers have not traditionally engaged in the long-range planning over several product lifecycles that cost-effective reuse or remanufacturing requires. This paper develops a model for incorporating long-range planning for component reuse in product design. The model employs a product portfolio approach based on market segmentation, rather than a single product. The model is embedded in a decision tool that aids in determining when a product should be taken back, and which components should be reused, recycled, or disposed. A case study of a line of personal computers (PCs) demonstrates an implementation of the model. It also shows that if product take-back is mandated, it is in the PC manufacturer's best interest to shift from selling a product to essentially selling a service by controlling when the product is taken back and, thus, effectively creating a leasing program. The portfolio approach creates opportunities for the design engineer to distribute the cost, reliability, and environmental impacts of component reuse, remanufacture, and recycling in such a way that the end result is higher customer satisfaction than designing one product for all customer groups.     

ETA-Electronic Teaching Assistant

The author discusses a computer program called ETA-Electronic Teaching Assistant. The aim of the program is to provide a collection of teaching aids for learning about basic circuits and electronics