查询词典 planetary motion

Methods: 12 fresh frozen shank-foot specimens from young adults were observed. The tibia was fixed rigidly. The talus and navicular were marked. We exerted different load on the forefoot for keeping it in different motion patterns and measured the three-dimensional coordinates of the marked points on these bones. The relative 3D motion range of the talonavicular joint was calculated. The characteristics of the talonavicular joint and the forefoot and their relationship were analyzed.

采用12例新鲜青壮年小腿足标本，牢固地固定胫骨，标记距骨和足舟骨，分别对足前部加载不同的负荷，使前足处于特定的不同运动状态，用三维数字化仪测量标记点的三维坐标值，计算距舟关节的相对三维运动值，分析距舟关节和前足的运动范围及两者间的关系。

Newton's first law of motion declares that a force is not needed to keep an object in motion.

伽利略提出一个运动的物体最终停下来是由于一种叫摩擦力的力的作用。

The gas flow is determined by local average Navier-Stokes equation, the motion of individual particle is obtained by solving Newton's second law of motion, particles collisions are taken into account.

气相流动通过求解局部平均Navier-Stokes方程获得，通过求解牛顿第二定律得到颗粒的运动，同时考虑颗粒之间的碰撞。

Based on the nonholonomic constraint arising from rolling contact and the discrete motion nature of stepper linear motors, the motion model of the robot is established.

结合实例进行了运动分析和轨迹规划仿真，表明这种运动分析模型是正确的，并且简化了球形机器人的驱动装置，降低了能耗。

Central-force Motion, Dynamics of a System of Particles, Dynamics of Rigid Body, Coupled Oscillations, Nonlinear Oscillations, Motion in a Noninertial Reference Frame, Continuous Systems.

力学 (0，3)/应用力学（0，3）中心力下的运动、多粒子系统动力学、刚体动力学、耦合振动、非线性振动、非惯性参考座标系中的运动、连续系统。

Matrices, Vector and Vector Calculus, Newtonian Mechanics-single Particle, Oscillations, Nonlinear Oscillations and Chaos, Gravitation, Some Methods in the Calculus of Variations, Hamilton's Principles Lagrangian and Hamiltonian Dynamics, Central-Force Motion, Dynamics of a System of Particles, Motion in a Noninertia Reference Frame, Dynamics of Rigid Body.

矩阵和向量的计算、单一质点的牛顿力学、线性与非线性的振动运动、重力、微积分上的变分法介绍、哈密顿原理、拉氏及哈氏力学、连心力下的运动、质点系的运动力学、在非惯性坐标中的运动、刚体的运动。

Planar motion also requires that axes of all prismatic pairs and all revolute axes be normal to the plane motion.

平面运动需要所有的棱形副的轴和转动副的轴都垂直于运动平面。

After introducing the basic knowledge of geometric algebra such as outer product,inner product and geometric product,this paper focused on the CGA description and computation with graphic reflection,rotation,translation,rigid body motion and screw motion,and gave the experimental demonstrations.

在简单介绍外积、内积和几何积等基本概念之后，重点论述了共形几何代数在图形反射、旋转、平移等变换和刚体运动、螺旋运动等方面的描述和计算方法，并给出了实验示例。

The straight line motion for the ant means the motion parallel to the invisible surface of the football.

直线运动的蚂蚁是指运动平行无形表面足球。

By using the basic method of virtual design and motion simulation of mechanical system based on Solid Works, virtual design of the robot of excavating tree stump was completed by synthetically using parametric and variable modeling technology and top-down design method. In case of the carrier was changed, the COSMOSMotion2006 was used to perform the motion simulation and optimized the parameter of the interface and the mechanical arm, by this way the useable of the new frameworks was confirmed, and in favor of reduce the exploiting cycle and exploiting cost.

通过使用SolidWorks软件的机械系统虚拟设计和运动仿真的基本方法，综合运用SolidWorks的参数化、变量化建模技术以及自上向下的设计思路，完成伐根清理机器人及其行走底盘的虚拟建模，并对由于行走底盘的改变而重新设计的接口和机械臂采用最新的COSMOSMotion2006软件进行了运动仿真和参数优化，以确定其机构可用性，有利于缩短产品的开发周期和减少开发费用。

Panorama Many people are dancing in a large sitting room.

在一个大客厅里，许多人在跳舞。

We fully understand how a microwave oven cooks food, it is first necessary to talk ...

我们充分理解一个微波炉煮的食物，这是首先要谈。。。