According to the flux, water level, temperature, etc, PLC sends out command to start or stop pumps, and keeps the system in normal operation condition.
PLC根据所采集的流量、水位、温度等条件自动控制开、停泵的台数，以确保清水供水系统的正常运行。
It includes the chemical thermodynamic balance system of REEs, soil water physical characters and REEs flux in soil profile.
模型包括土壤中稀土化学热力学平衡体系、土壤水分物理形状和土壤剖面的稀土通量。
It dissertates the principle of water flux transfer system based on GPRS, and expatiates the design method of water flux gather terminal, GPRS data transfer terminal, data center and system software.
开发了一种基于GPRS技术的水量远传系统，阐述了系统的构成原理，详细论述了水量采集终端、GPRS数传终端等系统硬件的设计方法，及数据中心系统软件的设计流程。
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