Combining with the service interface module of the multiservice access system - frame relay and atm interconnect system , theory and implementation about atm and fr network interconnect and service intercommunication are researched 本文结合“多业务接入器”的一个业务接口模块? ?帧中继与atm互连系统，完成了atm与帧中继网络互连、业务互通方面的相关理论研究和具体实现工作。
Fieldbus builds up interconnections among field instruments and field control units by providing a wholly digital , bi - directional and multi - variant communication path , which has no i only greatly improved the reliability and ability of anti - disturbance , but also sharply reduces the costs of installation and routine maintenance . can ( controller area bus ) belongs to the asynchronous communication network 现场总线使得现场仪表之间、现场仪表与控制设备之间构成网络互连系统，实现全数字化、双向、多变量的数字通讯，这大大地提高了系统的可靠性和抗干扰能力，同时节省了整个系统的投资、安装及后期维护费用。
From the perspective of the hla standard , it only enables interoperability among federates in a single federation execution , achieving reusability at federate level and component level . for multi - federations systems , the standard does not illustrate how to deal with interoperability among different federations and reusability at federation level , which increases the difficulty for researching the interconnection technology of multi - federations 从hla规范来看，它仅支持在单一联邦执行中的多个成员之间的互操作，可以实现成员级和组件级的重用；对于多联邦互连系统中，如何支持不同联邦间的互操作以实现联邦级的重用并未涉及，这给研究多联邦互连技术带来了困难。
