Forming the optimal union of multiple databases

Many organizations, best illustrated by libraries, have access to hundreds of databases possessing varying degrees of complimentary and overlapping records. While users may receive positive marginal benefits from data duplications, all databases and their services cannot be supported because of resource limitations. This paper attempts to conceptualize the problem of database collection in an environment of multiple databases, with differential content and performance characteristics, diverse users, and limited resources. It defines the database collection problem as a constrained zero-one integer programming problem and solves for the optimal combination or union of databases. Several extensions are shown, where special conditions are imposed on the relationships between databases and/or their availability.     

上海中产家庭食空间·新产品战略·角色原型开发

为了寻找上海中产阶级家庭的厨房和餐厅空间的新产品市场,本课题应用人种志的方法收集用户的真实数据,而后以角色法呈现这个用户群体中5种不同类型的典型原型用户,并对其一做了详细的介绍,从而指导未来的新产品市场战略。     

Behavioral Analysis of E-commerce Acceptance in Micro-enterprises简

E-commerce present opportunities and challenges for businesses, especially for micro-enterprises. This paper proposed a theoretical framework that in line with the unique characteristics of E-commerce acceptance in micro-enterprises in Chengdu, which is based on the unified theory of acceptance and use of technology （UTAUT） model. The extending UTAUT model includes key constructs of performance expectation, perceived behavioral control and the characteristics of owner-managers.     

精细化工生产中活性炭的使用技术和经验

详实阐述了在精细化工生产中活性炭的选择原则、使用技术、有效经验和综合效果等；     

PowerBuilder中的用户事件及其应用

PowerBuilder为窗口、用户对象等提供了大量的预定义系统事件，但应用程序有时为了某种特殊要求需要使用用户自定义的用户事件。就此介绍了PowerBuilder中用户事件的定义、触发及其应用实例。     

节能型乡村住宅建造技术尝试及经验教训

通过一个实际案例,在低技术生态手段运用、传统建造方式的改良等方面进行了尝试,并对一些经验和教训进行了讨论。     

企业门户单点登录技术的研究

通过对系统的设计方式、数据结构及安全机制分析,设计和研究统一的系统管理平台,实现单点登录技术的跨层级应用。针对频繁、多种形式进行身份验证的系统安全问题,以数据应用集成管理的理论方法,在概念、理论、方法、设计思路及安全管理等方面进行综合研究,把多个相似环境中共同存在的多个子系统以虚链路方式集成为一个系统,以实现跨系统数据查询、分析和统计。基于系统管理平台,实现多系统业务应用及安全机制的联合与管理。