下飞机

To study the taxiing-induced dynamic response of the aircraft with multiple wheels and multiple landing gears due to runway unevenness, base on several reasonable and necessary assumptions, the mathematical model of aircraft in taxiing is established using the d'alembert's principle. It can simulate taxiing inpact properties accurately, it considers in detail the vertical and horizontal motion and pitching about its center of gravity and the significant symmetric elastic modes.

在一些必要合理的假设下，利用达朗贝尔原理，建立了多轮多支柱式及小车式起落架飞机地面滑跑动态响应分析的全机模型，考虑全机沉浮、机体弹性和定常气动力的影响，起落架支柱的弹性变形，小车式起落架的车架的俯仰运动以及弹性变形，对等速滑跑飞机建立了全机运动的微分方程，并以旧金山28-R跑道为地面输入，利用时域积分的方法得到飞机滑跑的各种响应。

ARJ21 is under designing and manufacturing in our country, and we will continue the research of big airplane for civil and military use, in order to pass the strict navigability validations. Anti-bird impact analysis can reduce the cost of experiments and improve the design efficiency.

我国正在开展民用支线飞机ARJ21的设计制造工作，未来也将开展大型军民用飞机的研发工作，为了通过严格的抗鸟撞设计适航性验证试验，预先进行飞机结构的抗鸟撞设计分析显得尤为必要，论文正是在这种基础下开展了飞机结构的抗鸟撞仿真设计研究工作。

The stealth warplane for the microwave radar usually have complicated structures with the coating of wave absorption. On the base of calculation and modeling of the geometrical structure of the warplane in real size, the HF RCS of the air crafts under two different polarizations in different direction have been calculated with the FDTD. The result shows that the above mentioned stealth warplane have the obvious characterstics of frequency resonance, polarization and the relatively large RCS in HF Band 10-30dBm2, which can be used as the theoretical reference for selection of working frequency for sky wave OTH Radar and it also means that the sky wave OTH radar has good capability of anti-stealth targets quantitatively.

对微波雷达具有隐身作用的飞机，其形体较为复杂且表面涂敷有强吸波材料在对一种具有隐身几何外形结构实际尺寸飞机进行计算建模的基础上，文中采用FDTD技术得到了两种极化状态下该飞机无涂敷时不同方向上的短波雷达截面RCS值其结果显示了这种隐身几何外形飞机在短波波段有明显的频率谐振特性、极化特性和较大的RCS10-30dBm2，可为天波超视距雷达在选择工作频率时提供理论参考，并定量地说明天波超视距雷达具有较优的反隐身目标能力

The results show tha,t at a subsonic speed, airplane turbulence increaseswith an increase in flying speed, and that a smaller airplane is affected more fiercely than a bigger one under the same air turbulence and weather condition.

研究表明，在亚音速下，飞机飞行速度增大，飞机颠簸增强；在同样的气象条件和大气湍流强度下，小型飞机的颠簸比大型机剧烈。

The research shows that if the protected zone of aircraftAiis intercrossed with the shadow of aircraftAjon a horizontal surface and there is a vertical conflic,t a flight conflictbetween aircraftAiandAjwill occur. Under this condition, it is advisable to adjust the aircraftheading and speed or alter the flightaltitude to avoid the flightconflictwith the help of a surveillance radar.

研究表明：在水平投影面上，如果飞机Ai的保护区与飞机Aj的阴影交叉，将发生水平冲突；如果同时发生垂直冲突，那么飞机Ai和Aj 将发生飞行冲突，需要在雷达监控下，通过改变航向、速度和飞行高度以避免飞行冲突。

In order to enhance their corrosion-proof capability and improve maintainability and service life, the author makes a suggestion of reasonable selection of the coating thickness and thread fit clearance while ensuring the thread attachment strength, based on the re.

为提高飞机螺纹连接件的抗腐蚀能力，改善飞机的维修性能和提高飞机的使用寿命，本文根据镀层厚度与螺纹配合间隙的关系，结合国内外相应标准的规定，在保证螺纹连接强度的情况下，对如何合理选择镀层厚度和螺纹配合间隙来提高抗腐蚀能力的问题做了论

With about 200 aircraft a day taking off and landing on two runways and using gates at three concourses, the company wanted to make sure that each plane got in and out as quickly as possible, even if it arrived early or late.

这个机场每天都有大约二百驾飞机在两条跑道起飞与降落，并使用三个中央大厅的登机口，西南航班因此想要保证每辆飞机都能尽可能快地降落并起飞，甚至是在飞机早到或晚点地情况下。

The minute I got off the plane in Yemen last year, I could see how everything I thought I knew about that country was wrong and how far most of its people lived emotionally from, say, the October 2000 bombing of the U.S.S. Cole in Southern Yemen.

去年夏天，我一走下飞机踏上也门国土，就马上意识到我原来对那个国家的认识都是错误的，而大多数也门人在感情上也并不认同像 2000 年 10 月发生在南也门的炸毁克尔号驱逐舰那种做法。

The minute I got off the plane in Yemen last summer, I could see how everything I thought I knew about that country was wrong and how far most of its people lived emotionally from, say, the October 2000 bombing of the U.S.S. Cole in Southern Yemen.

去年夏天，我一走下飞机踏上也门国土，就马上意识到我原来对那个国家的认识都是错误的，而大多数也门人在感情上也并不认同像 2000 年 10 月发生在南也门的炸毁克尔号驱逐舰那种做法。

When I was "bumped" the gate agent switched me to a later flight that flew directly to La Guardia, landing me in Manhattan half an hour sooner than originally scheduled.

代理人把我安排到一个较晚的航班，直达拉瓜迪亚，结果我在曼哈顿就下飞机了，比原计划提前了半个小时。

He and Nina moved to California and lived at 2005 Ivar Street, Apt.

他和Nina搬到加州，并在2005年伊瓦尔街，公寓生活。

Droperidol （ potently inhibits transfected HERGchannels and this is the probable mechanism for QT prolongation.

氟哌利多有效地抑制了转染的 HERG 钾通道，可能是 QT 间期延长的机制。