通过实行资源接纳控制，资源接纳控制子系统（RACS）向上向业务层屏蔽传送网络的具体细节，支持业务控制与传送功能相分离；
The Resource and Admission Control Subsystem (RACS) through enforcing admission control decisions hides details of the transport layer from the service layer.
介绍了广州地铁屏蔽门系统的构成、各子系统的功能、系统故障应急措施和系统安全使用管理措施。
This paper describes the structure, function of each subsystem, emergency measure in case of malfunction and management for safe operation of the screen door in Guangzhou Metro.
屏蔽效应的研究对于防御电磁干扰，保证电子系统的正常工作是非常重要的。
It is important to study the shielding effectiveness to reduce the electromagnetic interference and to protect electronic components.
采用一定组分的材料对X射线进行辐射屏蔽，可以吸收大部分的低能光子，减少X射线对电子系统的辐射损伤。
Shield material with some certain composition can absorb a large part of low energy photon of X-ray and reduce the radiation effect on electronic component.
采用一定组分的材料对X射线进行辐射屏蔽，可以吸收大部分的低能光子，减少X射线对电子系统的辐射损伤。
Shield material with some certain composition can absorb a large part of low energy photon of X-ray and reduce the radiation effect on electronic component.
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