A passive data source can be made to have an active interface by an agent that polls it periodically and actively sends information about changes in successive polls.
休眠的数据源也可以有个活跃的接口，方法是让代理定期轮询它，并在接下来的轮询中传输更改的信息。
Digital monitoring system has set aside alarm interface, it would be able to take the initiative to connect detector or passive emergency button, an increase of incidents of police video features.
数字监控系统预留有报警接口，将来可以连接主动探测器或被动式紧急按钮，增加对突发事件的报警录像功能。
The software part is consist of opening out PCI driver program, scheduling logic, the display interface of passive mode and the FM, CW, all-scene, fan-scene of active mode.
软件部分介绍了系统的PCI驱动程序开发方式，时序逻辑的实现，还有系统的被动显示界面、主动FM、CW、全景、扇面显示界面的设计。
The software part is consist of opening out PCI driver program, scheduling logic, the display interface of passive mode and the FM, CW, all-scene, fan-scene of active mode.
软件部分介绍了系统的PCI驱动程序开发方式，时序逻辑的实现，还有系统的被动显示界面、主动FM、CW、全景、扇面显示界面的设计。
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