The radial momentum-position uncertainty relation in equality form of hydrogen atom and hydrogen-like ion is deduced by using the operator theory.
用算符理论推出了氢原子和类氢离子的等式型径向动量-位置不确定关系。
The equations of axial momentum and radial momentum are made during the presented inflation of parachute, and the parachute opening load in low atmospheric density is studied on the basis of them.
文章根据建立的降落伞充气过程中轴向和径向动量方程，研究了低密度大气中降落伞的开伞动载。
The cooling effectiveness of cylindrical gas-film cooling holes was numerically investigated, which was determined at different radial angles, momentum ratio and turbulent intensity.
为了探讨在不同径向角下动量比和湍流度对圆柱形气膜孔流动和换热的影响规律，采用数值模拟方法，研究了涡轮叶片的冷却效率。
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