配电线路微机保护软件系统设计     

魏臻珠  蒋建东 《中国科技信息》2006,(21):152-153,160

文中介绍了配电线路微机保护装置软件系统的总体结构及各功能模块的算法流程图。该系统能够完成线路的单相接地短路保护以及相间短路的电流速断保护和反时限过电流保护；并能够实现单相接地时线路故障点和故障类型的自动判断，便于线路的检修维护。该系统的应用将会大大提高广大城乡电网和工业企业配电网的保护水平．  相似文献   

一种可并行逆向工程处理的设计模式     

刘建宾  柯亨进  王凤琴 《科技广场》2007,7(1):18-19

建立一种可并行逆向工程处理的抽象机设计模式,并通过测试说明使用该模式可以减少处理时间。  相似文献   

基于VRML和Java的交互式虚拟产品设计     

翁蓉  廖小平 《中国科技信息》2007,(24):129-130

基于虚拟现实建模语言VRML和Java编程技术，将两者结合运用构建一个应用于数字科技馆中的交互式虚拟产品设计系统，使青少年可以通过互联网协同多人进行产品设计。  相似文献   

敦煌北朝龛楣图案演变及其装饰特征     

李敏 《家教指南》2011,(3):51-55,128,129

龛楣图案作为敦煌装饰图案的一个种类,虽然主要存在于北朝和隋代,但它作为一种特定的适合图案其纹样造型的组合非常巧妙和谐,具有极强的艺术性。其纹样内容、图案构成形式和装饰色彩与佛龛的形制、结构乃至洞窟形制的历史演变有着密切的关系,在不同时期呈现出特定的历史时代风貌。通过对敦煌龛楣图案发生、发展的过程进行分析研究,可以认识到龛楣装饰图案的宗教性、建筑性、装饰性以及民族性特征,是宗教性、功能性和艺术性的统一。  相似文献   

任务驱动式电子商务教学模拟系统的设计   总被引：1，自引：0，他引：1  

李刚 《安徽科技学院学报》2011,25(4):53-56

"任务驱动"教学法强调学生在真实场景中的任务驱动下,在探究完成任务或解决问题的过程中,在自主和协作的环境中,在讨论和会话的氛围中进行学习活动,最终达到使学生有效地实现对当前所学知识的意义建构的目的;电子商务教学模拟系统正是基于这一思想的探索与尝试,建立电子商务的网上学习、交流、测试的环境,学生通过具体操作来理解、掌握商务实践的方法、手段、技术要点,熟悉电子商务的运作流程;同时通过在线交流、自测、考试等形式检验学生对知识的掌握情况,力求使学生最终掌握这门新兴学科,能够运用所学的理论和方法构建一个符合需求的电子商务系统。  相似文献   

输油管的优化布置模型   总被引：1，自引：0，他引：1  

杨鹏  李盛东  孔梦秋 《毕节学院学报》2011,29(8):79-85

通过对输油管的布置进行深入研究,根据两炼油厂到铁路线距离和两炼油厂间距离的各种不同情形,考虑共用管线费和非共用管线费相同(或不同),以及A、B两炼油厂的生产能力不相同时,选用相适合的油管,利用几何知识和函数极值解的知识,建立以总铺设费用为目标函数的优化模型。  相似文献   

Customer acceptance of IPTV service quality   总被引：1，自引：0，他引：1  

Hyeong Yu Jang  Mi Jin NohAuthor vitae 《International Journal of Information Management》2011,31(6):582-592

The purpose of this article is to provide insights into the effects of Internet Protocol Television (IPTV) service quality and reveal mediation effects in the process of forming the repurchase intention. This study incorporates additional theoretical construct, perceived enjoyment, to reflect IPTV characteristics using extended technology acceptance model (TAM). This study empirically investigated a research model and conducted a survey of IPTV service users. The results of this study are as follows. First, IPTV service quality is summarized as design, security, and customer service, which is supported by second-order factor analysis. Service quality had an influence on perceived usefulness, perceived ease of use, and perceived enjoyment. Second, perceived ease of use had a significant effect on perceived enjoyment, and perceived usefulness also had an effect on repurchase intention. Third, attitude, trust, and satisfaction had a positive effect on repurchase intention. To reveal the impact on repurchase intention of the IPTV service quality, this study proposes customer acceptance on IPTV service based on a modified TAM.  相似文献   

Collaborative management of business metadata     

Kai M. Hüner^{Author Vitae}  Boris Otto Author VitaeHubert Österle Author Vitae 《International Journal of Information Management》2011,31(4):366-373

Legal provisions, cross-company data exchange and intra-company reporting or planning procedures require comprehensively, timely, unambiguously and understandably specified business objects (e.g. materials, customers, and suppliers). On the one hand, this business metadata has to cover miscellaneous regional peculiarities in order to enable business activities anywhere in the world. On the other hand, data structures need to be standardized throughout the entire company in order to be able to perform global spend analysis, for example. In addition, business objects should adapt to new market conditions or regulatory requirements as quickly and consistently as possible. Centrally organized corporate metadata managers (e.g. within a central IT department) are hardly able to meet all these demands. They should be supported by key users from several business divisions and regions, who contribute expert knowledge. However, despite the advantages regarding high metadata quality on a corporate level, a collaborative metadata management approach of this kind has to ensure low effort for knowledge contributors as in most cases these regional or divisional experts do not benefit from metadata quality themselves. Therefore, the paper at hand identifies requirements to be met by a business metadata repository, which is a tool that can effectively support collaborative management of business metadata. In addition, the paper presents the results of an evaluation of these requirements with business experts from various companies and of scenario tests with a wiki-based prototype at the company Bayer CropScience AG. The evaluation shows two things: First, collaboration is a success factor when it comes to establishing effective business metadata management and integrating metadata with enterprise systems, and second, semantic wikis are well suited to realizing business metadata repositories.  相似文献   

浅谈颠覆性技术     

蒋子规 《中国科技信息》2011,(23):47+54-47,54

主导性设计和颠覆性技术是技术、产品和服务业务的两种商业模式。本文主要通过颠覆性技术与维持性技术之间的比较介绍了什么是颠覆性技术,并讨论了在辨别颠覆性技术时可能遇到的问题。  相似文献   

基于顾客满意度的改进设计决策模型     

刘琳 《科技广场》2011,(3)

由于科学技术发展越来越快,产品生命周期缩短,生产成本降低空间缩小,技术创新空间降低,各企业对顾客满意度的关注度越来越高,但是随着产品生命周期的缩短,产品更新换代速度的加快,企业对于产品改计的切入点寻找难度增加,改进成本也随之提高,本文从顾客满意度的角度,对卡诺(Kano)模型进行改进,引入优先指数,将待改进指标进行排序,使企业的改进方向更为明确,为改进决策起导向作用。  相似文献