飞行器

At a press conference Tuesday at the American Geophysical Union fallconference, scientists from NASA's Lunar Reconnaissance Orbiter alsohinted at possible organics locked away in the lunar regolith .

在新闻发布会上周二举行的美国地球物理联合会秋季会议上，来自美国宇航局的科学家对月球勘测轨道飞行器也暗示可能有机物锁在月球的风化。

Based on the matrix analysis, the error sources of the measurement accuracy are analyzed, and the maximum relative error of this mathematical model is estimated.

实验数据表明，该方法将飞行器的姿态变化进行了有效放大，在一定转动范围内，对于姿态参数的测量误差不超过3′。

The dynamic performance and relative stability were analyzed, and the simulation results was compared with least square method.

研究结果不仅验证了仿真控制函数的可用性，而且论证了极大似然法在飞行器参数辨识中的优势。

The higher technical requirements of the FMS are proposed with the raise of the performance of flight vehicles. It is the main aspects of developing of FMS to raise the frequency respondency, accuracy, robustness, and reliability, from the view of the development tendency for the flight control system simulation in the world.

随着飞行器的性能的提高，对飞行转台系统也提出了许多更高的技术要求，从国内外发展趋势来看，"高频响、高精度、高鲁棒性、高可靠性"是伺服转台系统主要性能指标和发展方向。

Using the 294cc rotary engine, it can influence the maximum rpm and power of the engine output under the terms of using all kinds of length intake. Then it can find out the best length of intake of the rotary engine. In addition, under the terms of space limit of intake, it can influence the maximum rpm and power of the engine output when the intake is forced to limit on a certain length. To install a resonance in the intake system, according to the equation of Helmholtz, it can design the all kinds of size of the resonance. Using to change the volume and geometirc form of the resonance, it can find out the maximum rpm and horsepower of engine output in order to reduce the influence of the variation of engine intake length. Under the verification of the experimental result, this simple device can increase the rpm and horsepower of the rotary engine obviously to achieve the output performance that the engine requires to supply. Such the revisal of intake need the lower cost but it can obtain very obvious efficiency. It is a very feasible way.

藉由一具294cc的飞行器引擎，在使用各种不同长度进气道的条件下，对引擎所能输出的最大转速及马力有一定的影响，藉此找出该具引擎的最佳进气道长度；此外，在进气道因空间限制的前提下，进气道被迫只能局限某个长度以下时，在这种条件下，引擎所能输出的最大转速与马力等相关性能会随之受到影响，在进气系统加装一个共振腔，配合Helmholtz的方程式，设计出各种共振腔各部位的尺寸，利用改变共振腔的体积与几何形状，可以寻求增加引擎转速与输出马力的最大值，藉此降低进气长度变化所带来的影响，在实验结果的验证下，此一简单的装置可以明显的增加引擎转速与马力，以达到对引擎所需的输出性能要求，这样的进气系统修改所需的费用极低，但却可获得很明显的功效，是十分可行的方式。

The accurate prediction of drag is key to the design of the low Reynold′s number flight vehicle,and the accurate prediction of friction drag which is induced by separation and transition of the boundary layer is key to the accurate prediction of drag.

而与附面层分离和转捩相关的摩擦阻力的精确计算则是此类飞行器阻力精确计算的关键。

One of the most serious bottlenecks is low Reynolds number aerodynamics, which is also one of the most attractive research fields.

其中微型飞行器低雷诺数空气动力学是其最为根本的技术瓶颈之一，也是当前受到广泛关注的热点之一。

The shape of the staff's section affect the RCS strongly. As a basic research work for electromagnetic scattering of 2D complex target, this disseration provides the powerful way in rigorous modeling and effective solution. The informations given in the disseration can help the stealth technology of aircraft.

本文研究作为二维混合散射目标电磁散射的基础研究为该类问题的精确建模和高效分析提供强有力的理论分析工具，对翼面RCS减缩及其散射机理的讨论可为飞行器翼面的目标隐身提供有效的理论指导。

Used of an aircraft, a rocket, or a space vehicle.

用于飞机、火箭或空间飞行器

Propulsion system ; liquid rocket engine ; near space vehicle ; bipropellant

推进系统；液体火箭发动机；近空间飞行器；双组元推进剂

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。