飞行器

No clickety-click of little spyders.

窗外没飞行器没有蜘蛛的沙沙声

Ships also could install this type of laser for close-in defense, and ultimately the system might be placed on aircraft.

舰艇也可能为近程防御系统安装这种类型的激光系统，最后，这个系统可能被安装在飞行器上。

The study of flames spreading over solid combustibles in microgravity is essential for improvement of fire safety in spacecraft and space stations.

微重力条件下可燃物表面的火焰传播过程对于航天飞行器和空间站的火灾安全具有重要意义。

Microstrip patch antenna has been wildly used because of its own advantages, such as: low profile, light weight, easy fabrication, conformability to mounting hosts.

由于微带贴片天线特有的优点(剖面低、重量轻、易制作和容易做到与飞行器共形等)，在实际当中得到了广泛的应用。

As the development of technology , the use of conformal micropstrip antenna in plane and aviation aerocraft becoming more and more abroad.

随着科学技术的进一步发展，共形微带天线在导弹、飞机、航空航天飞行器上的应用十分广泛。

According to the flight feature of high-speed unmanned aerial vehicle, a kind of federated Kalman filtering based on constant acceleration moving is presented.

针对高速无人飞行器运动的特点，设计了一种基于匀加速直线运动的联邦卡尔曼滤波器。

In order to attain more precise result, the effect of contact surface must be considered.

进行飞行器结构分析时，为了得到更为精确的分析结果，必须考虑连接面接触的影响。

As a result, it shows thatthe static or dynamic subsystem optimum alone is not equal to the system optimum. Three initial value problems met in the optimal design of flying vehicle are studied andconclusions are derived that: orthogonal test method can be adopted to decide the initial valueof static optimization problem, some mathematical techniques can be used to deal with thecostate variables of Maximum Principle and decide the initial value of the costate variable,the indirect method can be used to get the analytical solution under ideal case to guide thechoice of the initial control curve in the direct method. With some numerical examples oftrajectory optimization, it shows that all these methods are useful not only in accelerating theconvergence but also in converging to the global optimum.

针对飞行器优化设计中的三种初始值问题进行了研究，以远程弹道导弹弹道的工程优化为例说明，对于静态优化问题，采用正交试验法选取初始值，不仅可以大大加快收敛的速度，而且更有可能收敛到全局最优解；以气动力辅助变轨问题为例说明，用共态变量的一阶泰勒级数展开可以解决极大值原理中共态变量初值难于确定的问题；以二级弹道导弹的主动段弹道优化为例说明，利用间接法在理想情况下得到的解析解来指导直接法初始控制曲线的选择，将大大有利于提高直接法的收敛速度。

Jet counterflow is usually used for the motion state control of aerospacecraft such as a missile, a shuttle, a satellite, and a spaceship, etc.

超声速射流逆流通常用于导弹、航天飞机、卫星和飞船等飞行器运动状态的控制。

ABSTRACT Laser propulsion, which works on the counterforce generated during the interaction between high-power laser and propellant, is a n...

激光推进是利用高能激光与工质相互作用产生的反作用力推动飞行器前进的新概念推进技术。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。