查询词典 trajectory

For the plane wave of laser without pulse shape, we derive the express of electron trajectory by the relative Lorentz and energy equations. Note that the orbit of electron becomes a "fat-8" in the average rest frame. For the plane wave of Gaussian laser, we may know that, through relative Hamilton-Jacobi equation, electrons are accelerated in the front of pulse and decelerated backward. Whereas for the non-plane wave of Gaussian laser, we solve the Lorentz and energy equations by fourth order Runge-Kutta method.

对于无脉冲形状的激光平面波是从考虑了相对论效应的Lorentz方程和能量方程出发，得到了电子的运动轨迹方程表达式，在纵向平均速度参照系下该电子的轨迹呈现"8"字形；对于高斯型单色激光平面波是从相对论Hamilton-Jacobi方程出发，得到激光平面波在脉冲前沿加速电子而脉冲后沿减速电子，电子能量增益为零；而对于高斯型单色激光非平面波是从拉格朗日运动方程和能量方程出发，通过四阶Runge-Kutta法数值求解，得到电子在纵向有质动力、横向电场作用下加速电子，最后在强大的横向有质动力作用下从脉冲侧面散射出去，可以获得很大能量增益本文得到了相应的电子瞬时动量解析表达式。

Prior to the giant planet killer asteroid, several hundred smaller ones travelling on the exact same trajectory always precede it, giving us ample warning by striking the Earth 3 weeks ahead of time even though we're in a totally different position in our orbit.

在这巨大的杀手级小行星前，数百颗同样轨道的小碎片总是领先它，在三个星期前给予人类充份的预警时间，尽管地球还在撞击轨道前的位置上。

Simulation and experimental results validate high trajectory tracking performance and global property.

仿真和实验结果表明系统在该控制律作用下具有良好的轨迹跟踪性能和全局特性。

In introducing open NC system software, the article, by using a C ++ Builder programming language to open examples of numerical control system based on the GT400-SV motion controller of Googol Technology, expounded the interface on the planning, interface design process and The real-time display methods of coordinate trajectory, and focused on the main functions of the module method.

文章在介绍开放式数控系统软件方面，以一个采用C++ Builder编程语言构建了基于固高GT400 SV 运动控制器的开放式数控系统的实例，论述了界面规划、界面设计过程及坐标运动轨迹的实时显示方法等，着重讨论了主要功能模块的实现方法。

This behavior is simple and efficient, but may destory the solving trajectory. In order to improve the performance of the system, we introduce the notion of agent compromise in distributed graph coloring problem solving with ERA.

为提高系统的求解性能，我们在求解分布式着色问题时，引入了agent妥协，通过妥协agent的行为，给难以确定赋值的主要变量赋值，从而实现求解性能的提高。

The interceptors at Fort Greely and Vandenberg are intended to shoot down intercontinental ballistic missiles in the middle of their trajectory, outside the Earth's atmosphere.

但GBI地下储存发射与洲际弹道导弹相比呢也没有多大区别，空军在这方面的技术经验均要比陆军丰富，再加上范登堡已经有了航天发射场，不需要投入更多资金建设，所以选择它作为GBI第二个基地，也是有道理的。

The optimization result shows that the maximal attack area is an ellipse of 17 km half long axis and 10 km half short axis, and it is better than the conclusion of a lot of simulation researches aiming at this warhead, and it can offer reference for further design of reentry trajectory.

优化结果表明，最大可攻击区范围是一个长半轴为17 km，短半轴为10 km的椭圆区域，此结果优于针对该弹头进行的大量弹道仿真所得的结论，可为进一步弹道设计提供参考依据。

Foreign experts, using the color swatch, 555 on evaluation Lab color space of the results of the rink and Don E and relate to each other and found that the CIE Lab system to 0.72 is evaluated in all color space and Visual feeling seeastigmatism hithermost, and racerunners in the Munsell Color hue trajectory and constant color degree path in a and b revealment improvement is also very close.

国际大师搁置555差色样，评价Lab色不时间的△E与纲测甘休的彼此干系，发掘CIE Lab编制为0.72，是长远所有颜色不时间洋筹算色差和触觉感触最挨近的，与孟塞尔色卡洋恒定色相轨迹和恒定彩量轨迹在a和b二维坐标系的恶化程度也很挨近。

Ben Hogan once said that controlling his ball flight trajectory was one of his big keys to playing great golf.

奔过冷曾说他控制球的飞行轨迹是他的一个伟大的大钥匙玩高尔夫球。

Neither all of the hullabaloo surrounding the Olympics nor the Sichuan earthquake response significantly alters China's developmental trajectory.

不管是围绕奥运会的喧嚣，还是对四川地震的反应，都不能真正改变中国的发展路径。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。