Mathematical model is a base of solving quantitatively environmental pollution control.
数学模型是定量解决环境污染控制问题的基础。
A mathematical model of liquid nitrogen system of a space environmental simulator is introduced and a quasi-stationary control method is developed in this paper.
大型空间环境模拟器的液氮系统庞大复杂，为满足确定控制方案、建立故障诊断模型、技术改造等的需要，建立液氮系统的数学模型是十分必要的。
A mathematical model of optimum impounded level considering environmental risk is established based on it.
在此基础上，建立了水利工程考虑环境风险的蓄水位优选模型。
Basing on this foundation, a mathematical model for exploitation scale decision of optimization which consider Environmental Risk is established.
在此基础上，建立了水利水电工程考虑环境风险的开发规模优选模型。
Basing on this foundation, a mathematical model for exploitation scale decision of optimization which consider Environmental Risk is established.
在此基础上，建立了水利水电工程考虑环境风险的开发规模优选模型。
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