turning points in analytic mechanics 分析力学的转折点
The research of modern analytic mechanics mainly includes two aspects: First, the research of higher-order differential equations of motion; Second, the research of symmetry and conservation quantity of mechanical system.
现代分析力学的研究主要包括两个方面:一、高阶运动微分方程的研究;二、力学系统的对称性与守恒量的研究。
参考来源 - 力学系统中的高阶运动微分方程与对称性和守恒量·2,447,543篇论文数据，部分数据来源于NoteExpress
Virtual work principle is an important principle in analytic mechanics.
虚功原理是分析力学中一个重要的原理。
In a recent admired work on Analytic Mechanics it is stated that we understand precisely the effect of force, but what force itself is we do not understand!
在最近一部值得称道的有关分析力学的著作中，有这样的说法：对力的效果，我们一清二楚，但对力本身我们则一无所知！
An analytic representation for the third-harmonic generation along the well is derived by the density matrix operator theory of the quantum mechanics.
利用量子力学中的密度矩阵算符理论导出了该系统中三次谐波产生的解析表达式。
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