嵌入式计算机的BIT设计与实现

依据嵌入式计算机组成特点,在可测试性设计中采用层次式测试硬件结构,通过分布式测试控制管理,实现从器件级、模块级到子系统级、系统级的逐级测试.在BIT测试中,以CPU测试为例解析了测试用例数据、用例过程、执行控制和判决的组织与实现. .     

Assisting designer using feature modeling for lifecycle

This paper presents a product dynamic model and design for X solution (DFX) developed in C++ with the OpenCASCADE geometric kernel, allowing the designer not only to get feedback on the viability of his design choices but also to collect data for process and task planning, maintenance and end-of-life strategy planning. The implemented method evaluates automatically both the efficiency factors and the incompatibilities between development characteristics in order to optimize the design of the product for multiple domains. The framework of this DFX solution, based on the product data structure, consists of imposing integration constraints concerning the development process during the entire design product process. In this paper, simple assemblies are used as brief examples to demonstrate the application of the proposed integrated design solution, its effectiveness to improve the design for X and collecting useful data for entire lifecycle duration. The method developed has been formalized with the NIAM model.     

基于GSM GPS短消息的车载移动终端的设计与实现

为了解决对城市车辆进行实时监督和统一管理的问题,基于GPS全球定位系统和GSM数字蜂窝网,以性价比较高的AVR微控制器开发设计了GPS车载移动终端设备.终端通过GPS获取当前位置和时间信息,并以短消息的形式通过GSM网络发往监控中心,在中心的电子地图上实时地显示出来.同时监控中心的控制指令,如跟踪监听,遥控设置等,通过GSM网络发往车辆上的终端设备,从而实现了系统的交互运作.终端功耗低,体积小,操作简单,便于在系统升级和维护.     

密封式铅酸蓄电池化成

作者介绍了密封式铅酸蓄电池极板的化成方法,并指出进行化成时应注意之要点。     

Institutional reform in British construction: partnering and private finance

The British construction industry is presently going through a period of rapid change. A combination of government-led reform initiatives, changes in government procurement strategies, and increasing exposure to international competition is focusing minds and shifting positions. This paper provides an analysis of the institutional aspects of these changes, identifying the root of the problems that the reforms are tackling, and indicating what the prospects of success might be. The paper starts with a historical overview of the evolution of what is here called the professional system, which has dominated the British industry for 150 years. This provides the context for the exploration of the two principal forces for change in the industry - the reform of contractual relations, especially the diffusion of partnering, and the shift of government procurement towards concession contracting in the shape of the Private Finance Initiative. In conclusion, the prospects for success are discussed, noting that the British construction industry is relatively successful in international markets, but that it shares many traditional problems of other sectors of British industry - the predominance of personal capitalism has meant a failure to develop organizational capabilities - the most notable symptom being the continuing reliance on self-organizing gangs of workers for actual production. Le secteur de la construction britannique traverse actuellement une periode de mutation rapide. Des initiatives de reforme lancees par le gouvernement, une evolution de la strategie des approvisionnements gouvernementaux et une plus grande sensibilite a la concurrence internationale occupent les esprits et font bouger les positions. La presente communication analyse les aspects institutionnels de ces changements, localise les racines des problemes auxquels s'attaquent les reformes et indique quelles sont les chances de reussite. Ce document commence par une revue historique de l'evolution de ce que l'on appelle au Royaume-Uni le 'systeme professionnel' qui domine l'industrie britannique depuis 150 ans. On dispose ainsi des elements qui permettent d'explorer les deaux principaux axes du changement qui agissent dans l'industrie britannique de la construction, a savoir la reforme des relations contractuelles (notamment la diffusion du partenariat) et le passage des approvisionnements gouvernementaux a des contrats de concession sous forme d'initiatives financieres privees. En conclusion, l'auteur examine les chance de reussite et note que l'industrie de la construction du Royaume-Uni obtient d'assez bons resultats sur les marches internationaux mais qu'elle partage bon nombre des problemes traditionnels d'autres secteurs industriels de ce pays. La predominance du capitalisme personnel a empeche le developpement des capacites d'organisation, le symptome le plus remarquable etant le fait que l'on continue a s'appuyer sur des groupes auto-organises de travailleurs pour la production proprement dite.     

浅谈光伏系统配套之光伏防雷汇流箱

湖南普天科比特电子科技有限公司(以下简称"科比特")多年来一直致力于防雷产品的研制、开发和生产。如今紧跟时代步伐,大举进军太阳能光伏防雷行业,研制并生产出具有多项专利技术的KBT-PVX系列光伏防雷汇流箱。本文对此汇流箱在实际应用中可以解决的问题及产品优势作了详细介绍。科比特将再接再厉、解决更多核心技术问题,为光伏防雷行业的可持续发展努力拼搏。     

基于Word的质量管理系统应用开发

详细介绍了基于word的质量管理系统的体系结构、功能设计和实现方法。基于Word的质量管理系统通过对Word进行二次开发，使企业在Word中既可以实现对大量非结构化数据和复杂报表的处理，又能够通过网络数据库实现质量信息的存储、共享、分析和再应用，可以推动企业质量管理信息化的发展。     

浅谈压滤机腐蚀问题的处理

本文阐述了贵溪冶炼厂硫酸车间废酸处理系统卧式和立式压滤机在生产使用过程中出现的腐蚀问题 ,并提出了改进方案 ,取得了良好的经济效益和社会效益     

A BIST-DFT technique for DC test of analog modules

Among test techniques for analog circuits, DC test is one of the simplest method for BIST application since easy to integrate test pattern generator and response analyzer are conceivable. Precisely, this paper presents such an investigation for a CMOS operational amplifier that is latter extended to active analog filters. Since the computation of fault coverage is still a controversy question for analog cells, we develop first an evaluation technique for optimizing the tolerance band of the measurements to test. Then, using some DFT solutions we derive single DC pattern and discuss the minimal number of points to test for the detection of defects. A response analyzer is integrated with a Built-in Voltage Sensor (BIVS) and provides directly a logic pass/fail test result. Finally, the extra circuitry introduced by this BIST technique for analog modules does not exceed 5% of the total silicon area of the circuit under test and detects most of the faults.