查询词典 angular acceleration

In the teaching of central field, we should pay attention to turning the relative motion of two - body into one dimentuonal radial motion by introducing two physical concepts of reduced mass and effective potential energy, and we should also pay attention that the area law is the geometrical description of the conservation of angular momentum in the central field.

在有心力场教学中，应着重强调指出：通过引入折合质量和有效势能这两个物理量，把二体相对运动问题转化为单体沿径向的一维运动问题；以及面积定律是质心在有心力场中角动量守恒的几何描述。

However, the Big Bang does not explain many things, including the uneven distribution of matter that results in "voids" and "clumps," or the retrograde motion that must violate the Law of Conservation of Angular Momentum.

然而，大爆炸并不能解释许多事实，包括物质分配不均，结果造成一些"虚空"和"实体"；而且"逆行运动"必然违反角动量守恒定律。

The bland sameness of space is at the root of both momentum conservation and angular-momentum conservation.

平淡无奇的空间一致性，既是动量守恒的根本，又是角动量守恒的根本。

You are at a distance R from the center of rotation, the carousel rotates at constant angular velocity ω, and the raindrops fall straight down with speed v.

你离旋转的中心还有一段很长的距离，那个传送带保持着有着尖角的速率旋转，还有那个雨滴垂直用一个v的滴下来，那里没有风。

The other important observation we need to make about spiral galaxies is that galaxies do not rotate rigidly (with a constant angular velocity), but to a good approximation each region rotates with the same tangential velocity.

另一个重要的观察，我们需要作出关于螺旋星系是宇宙不旋转严格，但有一个良好的逼近各地区轮流担任相同的切向速度。

The medium is water and the inner flow field of vortex pump is rotating flow with constant angular velocity, three dimensional, and incompressible turbulent flow.

数值模拟计算选取工作介质为清水，并认为是牛顿流体且局部各向同性；认为旋流泵的内部流场是以定常角速度绕固定轴的旋转流场，属于复杂的三维不可压湍流流动。

The first process is to optimize the geometric parameters of the press, on the assumption that the servomotor rotates at a constant angular velocity equal to that of the constant velocity motor. The second process is to optimize the displacement trajectory of the servomotor based on the results of the first process while keeping the geometric parameter unchangeable.

然后，建立了混合驱动压力机的优化设计模型，并将优化分为两步：第一步，假定伺服电机角速度与常规电机相同的条件下，优化设计出压力机的尺寸参数；第二步，在第一步优化结果的基础上，使机构的尺寸参数不变，优化设计伺服输入运动规律。

Two kinds of thermal boundary conditions were considered in this study. One was the isothermal rotating object and the other was the adiabatic rotating object. The motionless object was set in rotation at time t=0 with a constant angular velocity. The effect of natural convection was neglected.

本文假设容器内流体的普朗特常数等於5，并假设流体流动属於层流状态，模拟过程中考虑两种不同的边界条件，一为等温旋转体，另一为绝热旋转体；在不同的边界条件下，物体於时间t = 0时开始旋转同时固定角速度，并忽略自然对流。

Constant Angular Velocity mode and Constant Linear Velocity mode are integrated to build a single spindle motor control module to incorporate with long-seek servo. CAV mode and CLV mode are performed to show its feasibility. The experiment results showed that the pick-up-head can perform arbitrarily track-jump command, quite well.

此外，在主轴马达伺服部分，提出以跨轨旗标讯号来决定使用『碰-碰』控制法则让主轴马达转速变化的执行时间，也将主轴马达伺服中的等角速度控制模组与等线速度控制模组整合成功，形成单一的主轴马达控制模组，使与长寻轨伺服结合而更易於操作，让不论内、外寻轨的任意跨轨命令皆可以达成定线速度或是等角速度的控制目标。

215Zoned constant angular velocity?

分区恒角速度。。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。