查询词典 acceleration time

Secondly, the simulative software has been made using MATLAB to simulate the suspensory point load、 velocity、 acceleration and pure toque of speed reducer shaft of pumping unit on any place and the displacement、 velocity、 acceleration of main component of pumping unit and the forces of linked point of two components, so the changes of the motion and the force of pumping unit and the geometry parameters' influence on the main performances of pumping unit have been dynamic analyzed.

其次，利用MATLAB，编制了仿真软什，对抽油机在任意位置时的悬点载荷、速度、加速度和减速器输出轴抓矩以及抽油机主要构件的位移、速度、加速度利各构件连接点的受力等进行了仿真，从而动态地分析了抽油机的运动利受力变化及几何参数对抽油机主要性能的影响情况。

One component has the direction tangent to the path of this point, pointed in the same sense of angular acceleration of this body, and is called the tangential acceleration.

一个分量方向与该点的轨迹相切，指向与该物体的角加速度的方向相同，叫做切向加速度。

The brake of non-throwing arm is helpful to obtain the tangential acceleration in the right shoulder and normal acceleration, afterwards the right shoulder in surmounted hip vertical plane after the braking maneuver, can throw the angular momentum effectively to the arm.

①非投掷臂的制动，有助于右肩获得切向加速度，法向加速度，而后右肩在超越髋部垂直后的制动动作，能将角动量有效的传递到投掷臂。

The modified acceleration deceleration control algorithm of trigonometric function is proposed on the basis of studying the acceleration deceleration control algorithm of trigonometric function.

在对三角函数加减速控制算法研究的基础上，提出改进的三角函数加减速控制算法。

The nature of the acceleration unit-impulse response function of unbounded medium tending to vary linearly is proved by means of asymptotic analysis. Thus, the acceleration unit-impulse response function can be regarded as the summation of a linear function and a residual part which converges to zero. Based on this decomposition, two FE-SBFE coupling procedures are presented based on system realization and truncation integral technique respectively.

本文系统研究了相互作用力-运动关系的位移表达、速度表达和加速度表达，通过比较位移、速度和加速度单位脉冲响应函数的SBFE求解过程，确定采用相互作用力的加速度表达；通过渐近分析证明了无限地基加速度单位脉冲响应函数具有随时间延长而趋于线性变化的性质；利用这一性质将加速度单位脉冲响应函数分解为一个线性函数和一个衰减到零的残余函数的和，以此为起点发展出两种FE-SBFE时域耦合方法：基于系统实现的FE-SBFE时域耦合方法和基于截断卷积的FE-SBFE时域耦合方法。

The aircraft acceleration affects the response significantly, especially the vertical component of aircraft acceleration.

过大的垂直加速度分量或过小的水平加速度分量都可能使原稳定的系统变得不稳定。

A motion parameter estimation method by fitting the phase history of the moving target is proposed for airborne dualchannel SAR systems. The crosstrack velocity, alongtrack velocity, crosstrack acceleration and alongtrack acceleration can be estimated, respectively.

针对机载双通道合成孔径雷达(synthetic aperture radar， SAR)系统中运动目标参数估计，提出了一种利用目标相位历程拟合目标运动参数的方法，包括距离向速度、方位向速度、距离向加速度和方位向加速度估计。

In the acceleration, the ions energization is mainly in the middle of the period of the magnetic dipolarization and in the perpendicular direction; in the same condition, the acceleration for light ions is more quickly than that for heavy ions.

3在加速中，离子获得能量主要是在磁场偶极化过程的中期，且离子以垂直加能为主；在相同条件下，轻离子较重离子加能要快些。

The results show that,(1) the ion acceleration and energization mainly occur in the middle of dipolarization at distance of -12 RE to -8 RE,(2) the ion acceleration and energization along the direction perpendicular to magnetic field are faster than along parallel directi on,(3) variations of speed and energy for lighter ion are faster than that o f heavier ion,(4) the higher the initial energyis,the faster the ion accelerati on is, and the more energy is obtained by the ions.

主要结果为：(1)离子的加速及能量变化主要发生在磁场偶极化过程的中期，对应的地心距离位于-12RE到-8RE之间；(2)垂直于磁场方向上离子加速及能量变化较快，平行方向上较慢；(3)轻离子较重离子加速及能量变化快，磁场偶极化终结，3种离子的能量均可增加200倍左右；(4)初始能量较高时，离子加速及能量变化较快，离子最终获得的能量较大。

Based on the dynamic equation, the transport and acceleration of out-flowing ionospheric ions in the magnetosphere are studied by means of finding the ion distribution function. They include two parts: the study of static ion distribution with analysis and numerical compute; the study of ion acceleration by induced electric feild in the period of dipolarization of taillike geomagnetic lines in the substorm expansion phase with the numerical simulation of the ion distribution function.

本文在磁层中上行离子的加速与传输理论研究领域中，采用动力论方程，用求解离子分布函数的方法来研究问题：(1)用解析求解和数值计算的方法，对上行离子在不同Kp指数条件下磁场位形中的定态分布进行了研究；(2)用数值模拟计算分布函数的方法，对上行离子在亚暴膨胀相磁场向偶极形驰豫过程中受磁尾的感应电场加速进行了研究。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。