Remote predicate call can be logically divided into three layers. From the lowest layer to the highest one are respectively network service, system service, and application.
远程谓词调用在逻辑上可分为三个层次，从低到高分别为网络服务层、系统服务层、应用层。
The three-layered architecture model partition the information system into the client present layer, application service layer and database layer.
该体系结构模型将系统划分为客户端表示层、应用服务层、数据层。
This paper first proposed the whole framework of the control system based on SOA, control system is divided into three layers, the service layer, the bus layer, application layer.
本文首先在基于SOA的架构提出整个控制系统的架构，控制系统分为三层结构，服务层、总线层、应用层。
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