Based on the Poisson bracket and the discriminant of integral of motion, we prove the problem that the moment of momentum is the integral of motion when the mass point is affected by central force.
运用泊松括号，依据运动积分判别式，证明了质点受有心力作用时，其动量矩是运动积分的问题。
The testing unit includes integral ball, power meter, energy meter, the bracket of Kr lamp and Xe lamp and cooling system.
积分球、功率计、能量计、氪灯和氙灯支架及冷却系统、氪灯和氙灯电源等五部分组成。
The testing unit includes integral ball, power meter, energy meter, the bracket of Kr lamp and Xe lamp and cooling system.
积分球、功率计、能量计、氪灯和氙灯支架及冷却系统、氪灯和氙灯电源等五部分组成。
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