We can think of mces as an upgraded edition of normative corba event service , it not only has the intrinsic function of event service , but also has the new function that corba event service does not have 可以把mces看作为标准的corba事件服务的一个升级版，它不仅具有事件服务原有的功能，而且具有corba事件服务及通知服务所不具有的新功能。
This aim can be reached through using distributed event service . the distributed real - time event service ( dres ) provides a flexible mechanism for real - time , asynchronous and group communication between event suppliers and consumers 分布式实时事件服务是指：在分布式环境下，事件的提供者和处理者之间实现灵活的、实时的异步或群组通信的机制。
According to the model , researches the implementation of the two services . this two services is the key services of network - manufacture . based on the researches , this paper gives an example of 在这些研究的基础上，本论文给出一个基于corba的网络化制造系统实例，采用命名服务和事件服务，以数控系统和伺服系统设备为模型，在机电学院的内部局域网内的实现。
For this reason , we modify the normative corba event service to a certain degree , add the function of filtering the event , and add the function of supporting event query and answering the query that have practicable value 为此，我们对标准的corba事件服务进行了一定的修改，加入事件过滤的功能，此外，还加入了具有实用价值的支持事件查询和回答查询的功能。
First of all , this paper discussed how to design an efficient distributed event service system . in what follows , a flexible workflow model was introduced . then , a fine - grain workflow transaction model was surveyed 论文在讨论如何设计一个高效的分布式事件服务系统后，介绍一个灵活的工作流模型，研究我们讨论细粒度的工作流事务模型及工作流系统异常处理技术。
Dres discussed in the paper is studied and developed based on omg ' s cosevent . ders is then extended to meet real - time performance requirements and the functions of event filtering , scheduling , dispatching and combining are implemented 本文讨论的实时事件服务是在omg事件服务的基础上研究、开发的，扩展了该服务的实时特性，同时增添了事件过滤、事件调度、派发和组合的功能。
Deficiency of specification is analyzed in this paper based on introduction of corba , real - time corba and event service . concept and framework of distributed event service is put forward and then dres is implemented 本文在介绍corba及实时corba规范和事件服务规范的基础上，分析了规范中存在的不足，提出了分布式实时事件服务的概念和总体框架，并具体实现了该分布式实时事件服务。
In the third part , through the analysis to classic stream media file structure , join with the characteristic of structure event , we introduce corba notification based stream events service in broadcenter . finally we analysis the application ' s characteristic 第三部分通过对典型流媒体文件格式的分析，结合结构化事件的特点在broadcenter中引入基于通知服务的流事件服务，对其应用特点进行了分析。
Its design and implementation are particular discussed . third , the implemented real - time data service is tested to find if the performance is acceptable . also , the experiment indicates which is most efficient among the four modes of data transfer in the event service of corba 对测试数据进行的分析表明：事件服务的数据传输效率基本上能满足实时数据数据服务的实时性需要；在事件服务的四种数据传输方式种，经典的推模式的性能要更优秀。
The first is exhibited by the real - time characteristic of event itself and each event is arranged strictly according to its priority when it is transferred . distributed performance is exhibited by the fact that event service can be deployed on different computer network nodes , by which resources for network transmitting are reduced , so the performance of distributed event service is improved in some fields 实时性体现在事件本身具有实时特征，并且在其传递过程中各个事件严格按照事件优先级的高低排序；分布性体现在网络应用场合下，可以将事件服务分布到不同的计算机节点上，使用分布式事件服务本身减少了普通事件服务所产生的网络传输开销，因此提高了分布式实时事件服务在某些应用场合的性能。
