This system has high economy because of using itinerant monitor to analogy signals that made by PLC modules, using LED display and scan keyboard as press buttons that made by PLC dynamic I/O modules.

用PLC模块构成多路模拟量巡检，用动态I/O模块实现LED显示及扫描键盘按钮，使系统具有较高的经济性。

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High voltage silicon pile is the key component of the output circuits of color TV and color monitor, whose switch frequency is the direct restrictive factor of line scan.

高压硅堆是彩电和彩色显示器行输出电路中的关键器件，其开关速度的快慢直接限制了行扫描频率的高低。

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For most types of monitors, there are many differences between the input video format and the format which the monitor devices demand, which include scan rate, scan standard, resolution, etc.

对大多数显示设备来讲，视频信号的输入格式与显示设备所要求的格式在图像刷新速率、扫描方式、屏幕分辨率等方面都有很大差异。

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The father of three admits it was "scary" to read a pamphlet telling him the radiation exposure from each scan, but he was comfortable with the idea that the scans were necessary to monitor cysts associated with his pancreatitis.

WSJ: New Tracking of a Patient's Radiation Exposure