By means of the equation and scheme of molecular reorientation, the pulsation feature of the diffraction beam was illustrated qualitatively.

给出了液晶分子取向力矩平衡方程从理论上解释了这种现象。

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Based on the equation of action line for cycloidal pump, a geometrical mathematical model is built to solve instantaneous flow, displacement, average flow and the pulsation of the pump.

根据摆线泵的啮合线方程，建立了用几何法求解摆线泵的瞬时流量、排量、流量脉动率的数学模型。

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Through the analysis of gas pulsation characteristics in reciprocating compressor and deviation in set pressure, the equation is given for determining the minimum set pressure of safety relief valve.

分析了往复式压缩机气流脉动的特点，结合安全阀的整定压力偏差，给出了确定最小安全阀整定压力的公式。

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