输油管的优化布置模型

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。     

Customer acceptance of IPTV service quality

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.     

Collaborative management of business metadata

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.     

浅谈颠覆性技术

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。     

基于顾客满意度的改进设计决策模型

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。     

中药智能配药控制系统的硬件设计

为攻克现有配药控制系统的硬件设计的不足,设计了对应的取药机构、定位机构、机械机构、电机控制系统,实现了PLC对取药行走装置较高效、智能的控制。     

基于VERICUT的数控车床宏程序仿真应用

本文提出的数控车削加工教学实验仿真,对数控加工仿真的若干关键技术进行了研究,以此为基础建立了数控加工仿真系统并应用到教学中。学生利用此系统可以在计算机上模拟加工环境和在VERI-CUT平台上实现数控车削模拟仿真加工的过程,校验整个机床加工过程和加工程序的准确性,来帮助学生清除编程错误和优化切削参数,从而提高加工效率。     

农村电子商务环境下物流管理系统的设计与分析

本文介绍了在农村电子商务环境下物流管理系统的设计与分析,对功能模块和业务流程进行了分析与设计,并提出了利用Oracle 10i技术和EA server组件服务器的三层结构。     

基于OPNET的校园网络组建分析

校园网的建设是每个学校的重要组成部分,对于校园网来说,就是确定连接节点的个数,运用设备使分布在不同位置的信息节点连接到一个统一的网络中,使整个校园网中的信息节点相互联通。本文找出影响校园网性能的主要因素和网络"瓶颈",利用仿真软件OPNET搭建实验平台对改进的方案进行了仿真,并分析了实验结果。     

高职C语言程序设计实训探讨

高职教育定位于培养实用型、技能型的高级专门人才,对初次学习C语言程序设计的高职计算机专业学生进行实训是非常必要的。对C语言程序设计实训的目的与预期目标、实训内容、实训要求以及实训的考核方式等内容进行了探讨。