To make full use of the WAMS/PMU in the security monitoring, protection and control of power system, PDSR in phase angle-voltage space was studied.

为充分发挥含PMU的广域量测系统（W AM S/PMU）在电力系统安全预警、保护与控制中的作用，研究了节点相角-电压空间上保证暂态稳定的动态安全域的边界性质。

youdao

Research methods: in combination with the monitoring theory and experience for security protection, a visual management platform is set up by taking computer as core and adopting the.

研究方法围绕数字监控技术，建设以计算机为核心，结合安防监控的理论和经验，运用最新数字视频技术、网络通信技术构建企业的可视化管理平台。

youdao

Those costs, according to Cohen, break down to half a million dollars just for residential protection and surveillance that would include 24-hour security monitoring with a constantly streaming network of cameras.

CNN: Celebs shell out big bucks for security

Comcast's XFINITY Home Security service provides intrusion and fire protection in addition to a host of interactive features including home monitoring, home management and energy management services, with the added benefits of web and mobile access.

ENGADGET: Xfinity Home Security makes home monitoring and management Comcastic (video)