HART protocol which is the transitional protocol of field-bus allows transferring both digital signal and analog signal simultaneously in order to actualize bidirectional communication.

HART协议是现场总线的一种过渡性协议，可使数字与模拟信号同时传送且互不干扰，实现双向通讯。

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It is proved that this system automatically steers the direction of a receiver antenna and locks a synchronous satellite in order to acquire best communication signal.

经实践验证，该系统实现了自动控制接收天线转向并锁定某一个同步通信卫星，以获得最佳的通信信号。

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The local controller sends steering order to field signal-acquisition equipments and receives test data from RS485 bus, thereby communication control of RS485 bus was realized.

本地主控机通过RS485总线向现场信号采集设备发送控制指令并接收采集的测试数据，从而实现对rs485总线通信的控制。

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The long term objective of this project is to develop and apply innovative information and communication technologies for image and signal processing in order to better safeguard, diffuse and promote oral and intangible forms of cultural expressions proclaimed by UNESCO as masterpieces of the heritage of humanity.

UNESCO: Outline of Digital Archiving Project