In this paper , i introduce the concept , language , and general model about active database . in basis of understanding the design idea of adbms , i also describle the procedure of developing the jing cai project of si chuan province . and take the management system of budget target for granted , i provide a detailed description of developing the system providing active prediction ability with active database technology 本文介绍了主动数据库的概念、语言、一般模型等相关技术，并在深刻理解主动数据库管理系统设计思想的基础上，结合作者在实际工作中的成果，阐述了四川省金财工程的研发概况，着重以其中的预算指标管理系统的开发为例，对该系统中应用主动数据库技术实现“超预算分配”的主动预警功能作了详细的分析研究。
At the beginning of the paper , we introduce research background , development and current situation of active database , and active function subsystem and active database structure . on the base of the previous main memory dbms , the rule subsystem , which is used to implement the dbms ’ s active function , has been introduced 在原有的nhdb ~ *规则子系统的基础上,通过对nhdb ~ *规则子系统的改进,增加了执行模块和事务处理模块,利用规则机制来增强数据库的主动行为。本文研究了主动数据库的规则子系统。
The salary intelligent decision support system ( sidss ) is developed under our cooperation with personnel department of guangdong province . because data and knowledge in the system is time - varying , three technologies will take in our system . that ' s temporal database , intelligent decision support , active database 我们和广东省人事厅合作开发的工资智能决策支持系统( sidss ) ，由于存在着大量的随时间变化的数据和知识，所以我们将其作为研究时态数据库和时态知识推理的一个应用系统，这个系统是一个将决策支持技术、主动数据库技术以及时态数据管理三种技术融合一体的系统，即是一个具有主动性的时态工资管理决策支持系统。
Based on the techniques of main memory database , we have designed and realized the rule subsystem , the rule expression , rule memory structure , rule trigger mechanism , rule execution mechanism , events detection mechanism , transaction analyzing and conversion mechanism from the rule to statement so as to implement the active function of the system . we also discuss cascade trigger , rule termination of the active rule set 在改进的nhdb ~ *规则子系统中,实现了nhdb ~ *规则的形式化定义、设计了规则的存贮结构,研究了nhdb ~ *规则触发机制、事件检测机制、规则的执行机制、事务处理机制等,从而使得nhdb ~ *系统具有相应的主动功能,实现nhdb ~ *主动数据库的主动行为。
Active database can response for the changing of state in or out of system without the control of customer . so we expand it to help manage our system . we design the event , action and rule according to the demand of data receiving system , then use two level of priority to handle the rule conflicting . we improve the flexibility of our system through encapsulating event detector into dll 主动数据库能够自动对内部的或外部的状态变化进行反应,而无需用户干预,本文扩充了主动机制并把它用于广播数据接收系统的管理,设计了接收系统特有的一些事件、动作和规则,同时采用定义2层优先级的方法来处理规则的冲突。
The active database can satisfy the people " s requirements of these active services . active database is the integration of database and artificial intelligence technology , and it is a developing field in modern database technology . the active database management system ( adbms ) can automatically react to events 主动数据库( activedatabase )就能较好地满足这种主动服务的应用需求，它是现代数据库技术与人工智能技术相结合的产物，是目前数据库技术中一个正在发展的活跃领域。
