Factors affecting constant pressure difference control method and advantages and disadvantages of the control plan are analyzed theoretically through pipe system head curve and pump performance curve.
根据管道水力特性曲线与水泵的性能曲线，运用理论分析的方法，对影响末端定压差控制方式的因素和该控制方案的利弊进行了分析。
It is reasonable to fit the relation curve between secant-modulus difference and pressure by using exponential form.
割线模量差与初始含水量的关系曲线按指数形式进行拟合比较合理。
The 2D curve and 3D surface modeling of iris′s deformation morphology were build at the different pressure difference with crystal non-rising and at the same pressure difference with crystal rising.
建立了不同压强差下无晶体抬升时虹膜膨隆形态二维曲线及三维曲面模型；以及相同压强差下晶体抬升高度不同时虹膜膨隆形态的二维曲线及三维曲面模型。
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