研究相对论性变质量系统的守恒律。
The conservation laws of relativistic variable mass systems were studied.
从变质量物体的动力学方程出发，推导出变质量系统的动能定理。
The kinetic energy theorem of mass variable system is derived from the kinetic equation of mass variable body.
基于变质量系统力学理论，将这一类爬壁机器人系统看作变质量物体。
Based on variable mass system mechanics theory, the robotic system is regarded as a variable mass object.
运用变质量系统的基本原理，建立轴流脱粒空间内谷物运动的非线性力学模型。
Based on the principle of the varied mass system, the no-linear mathematical model of the crop mechanics in the axial threshing space has been set up.
运用变质量系统的基本原理，建立轴流脱粒过程中谷物运动的非线性动力学模型。
Based on the principle of a varied mass system, the non linear mathematical model of the crop mechanics for an axial threshing process was set up.
进一步针对轮式爬壁机器人，建立了非完整约束条件下的变质量系统分析动力学模型。
Then, the variable mass system dynamic model with nonholonomic constraints are developed for wheeled WCRs.
从变质量物体的动力学方程出发，推导出变质量系统的动能定理。指明其实用价值，并举例加以说明。
The kinetic energy theorem of mass variable system is derived from the kinetic equation of mass variable body. The practical value of it is pointed out using an example.
讨论了变质量系统的多方过程、绝热过程及等温过程的能量关系，并与常质量系统的多方过程、绝热过程及等温过程的性质进行了比较。
In this paper, the internal energy and heat of the polytropic process, the adiabatic process and the isothermal processes of the varying mass system are discussed.
讨论了变质量系统的多方过程、绝热过程及等温过程的能量关系，并与常质量系统的多方过程、绝热过程及等温过程的性质进行了比较。
In this paper, the internal energy and heat of the polytropic process, the adiabatic process and the isothermal processes of the varying mass system are discussed.
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