查询词典 point at

When a proton moves to a new point, a unit charge has been increased at the new point.

当一个质子从上一点移动到下一点时，下一空间点上就增加了一个单位电荷，根据现有的电动力学理论判断，会发生势的推迟。

The curve begins at the point where the ellipse intersects the first radial and extends counterclockwise to the point where the ellipse intersects the second radial. A radial is a line segment drawn from the center of the ellipse to a specified endpoint on the ellipse.

曲线由椭圆与第一个径向线相交的点开始逆时针延伸到椭圆与第二个径向线相交的点（径向线是指从椭圆的中心向椭圆上给定的终点之间的一段连线）。

The two one-way coupled map lattice system point by point feedback synchronization method to effectively realize the two systems take the same parameters, different initial conditions at the time of synchronization.

详细说明：对两个单向耦合映象格子系统提出逐点反馈的同步方法，有效地实现了两个系统取相同参数，不同初始条件时的同步。

Starting from loading conditions of lifting steel wire ropes, this paper makes more detailed analysis on the static stresses of the steel wire ropes, pointing out that the maximum loading point is at the point of tangency of steel wire rope's pendulous section and the hoisting sheave.

从提升钢丝绳的受力情况入手，对钢丝绳静应力做了较详细的分析，指出钢丝绳在悬垂段与天轮切点处为最大受力

It is a machine to transmit the charge from a point to a moving line, then get the charge at another point on a sphere conduct.

范得克拉夫起电机（ Van de graff generator：将电荷从一点转移到一条移动的带上，接着被另一点收集附着在一个球型导体上的机器。

Like a vertex of a polyline, it expresses a point on the object, but it also expresses the shape of the curve at the point .

和折线上的定点类似，它也表示对象上的点，不过这里表示的曲线上的点。

Based on Pontryagin maximum principle, the lunar soft landing problem is transformed into a two-point boundary value problem in mathematics. In consideration of the bound condition and transversality condition, the resulted two-point boundary value problem is converted into a parameter optimization problem aiming at the initial values of conjugate variables and the terminal time, then it is solved by the nonlinear programming.

首先，从庞德里亚金极大值原理出发，将有限推力作用下月球软着陆问题转化为数学上的两点边值问题；在考虑边界条件及横截条件的前提下，将该两点边值问题转化为针对共轭变量初值和末时刻的优化问题；然后应用非线性规划方法求解所形成的参数优化问题。

If a is any positive real number ,the point on the number line at a distance a unite to the right of the origin shall be taken as the point which corresponds to the number a.

如果a是任何正面实数，在编号行的点在远处在起源右边的一团结将被采取作为对应于数字a。

An instantaneous optimal semi-active control method is put forward. Combined sliding mode control with lyapunov's stability theory, the control weights matrix, which can minimize structural instantaneous energy, is designed. Simulation and shaking table test is conducted to validated the method's effectiveness. To solve combination explosion of controlled structural state encountered in high-rise building control, the semi-active control strategy, which can drive structural state point to reach the sliding mode switching band, is designed by using sliding mode control theory, and genetic algorithm is used to find the optimal semi-active switching to drive the structural state point to sliding mode switching band at prestissimo speed.

提出了一种瞬时最优半主动结构控制方法，利用滑模变结构控制理论和Lyapunov稳定性理论设计使结构瞬时能量最小的半主动控制权矩阵，仿真实例和振动台试验验证了本文所提方法的有效性和实用性；为解决在高层建筑半主动控制中半主动控制器状态组合爆炸的问题，利用滑模变结构控制理论设计在Lapunov稳定意义下使结构在运动状态空间中任一相点于以最快速率到达滑模切换带的半主动控制策略，并用遗传算法找出了最快到达滑模切换带的半主动控制切换组合。

An elementary solution is obtained, which represents the influence caused by a point dislocation placed at a point t on the real axis.

引言功能梯度材料functi(nally graded materials，FGMs在工业中，如航空结构和反应堆中，得到了广泛应用。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。