以客户为中心的CRM体系结构

客户关系管理系统（CRM）是提高企业核心竞争力的有力保障。但现有CRM产品存在某些缺陷,如不以客户为核心进行客户服务、客户服务过程自动化缺乏柔性,以及系统各功能模块协同能力较差等。针对上述问题,提高了以业务过程分类为基础的,基于事件驱动、工作流技术和ECA规则实现CRM系统体系结构的方法。该体系结构能够有效地解决目前CRM产品中的上述问题,为改善现有CRM产品的性能和开发性能更优的产品提供了一种新的手段。     

基于ECA规则的工作流过程建模

本文介绍了以树型结构定义工作流过程模型的方法和步骤,并根据节点之间事件、状态的依赖关系导出相应的ECA规则,阐述了如何得到和实现以ECA规则表示的工作流过程模型建立一个基于事件触发规则的工作流执行过程.     

主动数据库技术在即时消息传递中的应用模型

为了提高即时消息传递(InstantMessaging-IM)系统的实时性和可靠性,引入主动数据库技术(aDBS)。简单介绍了aDBS的基本概念和功能结构,引入该技术对传统IM系统的模型进行改进,提出了一个新的IM体系结构;分析列举了新模型中数据库应该具有的主动功能,最后就一些具体实现问题进行了分析。IM系统的部分功能由逻辑控制层面转移到经过优化的数据库层面,对于提高系统的实时处理效率和保障数据一致性,具有有效的作用。     

Distribution and synchronisation of engineering information using active database technology

Today, work collaboration is normal practice in developing modern products. Engineering collaborative work involves a number of team members that need to share and exchange design ideas while working with engineering analysis tools such as mechanical computer aided engineering systems. This work presents the M-Sync prototype system that uses an active database approach to enable exchange of engineering information among distributed team members in a timely manner. The distributed data is fully accessible by the local member and is automatically synchronised between different places using a database management system that support event-condition-action (ECA) database rules. Only updates introduced at one location are distributed to other locations, thereby minimizing information transfer and enhancing performance. Members working at different locations can therefore work in a peer-to-peer (P2P) manner and interactively manipulate the same set of information at the same time.     

2DCMA: An Effective Maintenance Algorithm of Materialized Views in Peer Data Management Systems

Update management is very important for data integration systems. So update management in peer data management systems （PDMSs） is a hot research area. This paper researches on view maintenance in PDMSs. First, the definition of view is extended and the peer view, local view and global view are proposed according to the requirements of applications. There are two main factors to influence materialized views in PDMSs. One is that schema mappings between peers are changed, and the other is that peers update their data. Based on the requirements, this paper proposes an algorithm called 2DCMA, which includes two sub-algorithms： data and definition consistency maintenance algorithm% to effectively maintain views. For data consistency maintenance, Mork＇s rules are extended for governing the use of updategrams and boosters. The new rule system can be used to optimize the execution plan. And are extended for the data consistency maintenance algorithm is based on the new rule system. Furthermore, an ECA rule is adopted for definition consistency maintenance. Finally, extensive simulation experiments are conducted in SPDMS. The simulation results show that the 2DCMA algorithm has better performance than that of Mork＇s when maintaining data consistency. And the 2DCMA algorithm has better performance than that of centralized view maintenance algorithm when maintaining definition consistency.     

含环触发图对应的主动规则集可终止性分析

主动规则集的可终止性是主动数据库规则集的三大重要特征之一.主动规则集可否保证终止将直接影响到系统的应用.由于主动规则间存在依赖关系,通过对依赖关系的分析,给出了规则的触发传递闭包、依赖传递闭包等概念.以此为基础,提出了用规则触发－依赖图(T-DG)方法来分析主动规则集的终止性.特别讨论了判定含环的触发图(TG)对应的主动规则集是否保证终止的方法,给出了相应的判定算法、算法证明及分析.     

主动规则的并发控制与死锁处理

在基于规则的主动数据库系统中 ,被触发规则通常以事务模式运行 ,这些并行事务由规则耦合方式确定其开始处理时刻和可串行化提交次序 .本文根据并行事务对于共享数据对象的锁继承和锁剥夺关系 ,提出了一个并发控制算法 ,并基于事务树 (森林 )给出一个有效的死锁检测算法和具有最小代价的死锁恢复算法 .     

级联触发器终止性的实现

通过给出触发器的形式描述,对级联触发器的终止性进行详细探讨,并分析了大型商用数据库系统终止级联触发器的方法,提出了一种避免级联触发器无限循环的方法,即采用限制触发器循环执行次数,并结合级联触发器上限参数,可以允许某些循环级联触发器的正常执行,同时又能有效地保证级联触发器的终止性。这种方法已在GKD国产数据库系统中得到应用和实现．     

基于参数比Petri网的主动数据库的行为研究

1 引言在主动数据库系统(Active Database System:简称ADS)中当特定的事件或某些条件成立时,ECA(Event-Condition-Action)便触发一些动作。形式上,一个ECA规则是由事件E、条件C和动作A组成的,事件可以是单个或组合的,条件可以是布尔表达式或产生True/False的数据库查询,动作可以是数据库操作的执行或应用程序的执行。尽管主动数据库     

基于主动数据库的工作流管理系统

高端工作流管理系统在应用中与数据库的频繁连接和数据交换成为其性能的瓶颈。该文提出一种新的基于主动数据库技术和ECA规则理论实现工作流管理系统的方法,探讨了基于主动数据库实现工作流管理系统的参考模型,与传统工作流参考模型的比较证明了该参考模型的合理性与可行性。