Attenuates slower than the c . e . , when the wing fly high enough , the c . e . is the main effect to the aerodynamic characteristics . 3 . the larger the chord , the stronger the c . e . and w . e 飞行高度较低时，波动效应和曲壁面效应对机翼的气动力都会产生很大的影响，两者之间存在较强的藕合效果;但是飞行高度较高时，综合的结果主要体现了波动效应的特征。
But the gps receivers on the air china 757 fix the position of the aircraft to within a few metres as it begins its descent through a long valley , around an awkward ridge and down onto the new runway at linzhi 但是当中国国际航空公司的波音757客机降低飞行高度通过一条危险山脊附近的长长山谷的时候，机上的gps接收器以米的精度锁定飞机的航向，安全降落在林芝机场的新建跑道上。
A loa between two air traffic control units specifies the coordination procedures between them . these include handover position ( s ) , cruising levels available , separation between aircraft , communication equipment and coordination requirements , etc 两个航管单位之间的协议书说明双方的航管协调程序，包括交接点位置、可供使用的飞行高度、飞机飞行间隔、通讯仪器和航管协调需要等。
However , in severe turbulence , abrupt changes in the altitude and attitude of an aircraft may occur and the pilot may momentarily lose control of the aircraft . for reporting and alerting purposes , moderate or severe turbulence is considered significant 强烈湍流则有可能令飞机的飞行高度及姿态出现突然转变，飞机可能会短暂失控。在发出预警或飞机报告方面，中度或强烈湍流均属于显著的湍流。
A civil aircraft , in violation of the provisions of article 75 of this law , fails to follow the air route and to fly at the altitude specified by the air traffic unit , or in violation of the provisions of article 79 of this law , flies across the airspace over a city （二）民用航空器违反本法第七十五条的规定，未按照空中交通管制单位指定的航路和飞行高度飞行，或者违反本法第七十九条的规定飞越城市上空的。
K . w . s . pilots learn to fly at extreme altitudes , （ 19 ） backwards , sideways and upside down as well as perform loops （ 20 ） and spins in an effort to build their confidence and give them courage to survive high - risk situations 所有肯亚野生动物服务协会受训的飞行员，不仅要学会在极端的飞行高度飞行?举凡向后飞、斜一边飞、倒着飞都要会，必要时还要来上翻?斗和空中旋转，如此才能建立这些飞行员的自信、应付未来更加危险的工作情境。
All take - offs in the northeasterly direction have to adopt the noise abatement departure procedures prescribed by the international civil aviation organization to reach a higher altitude within a shorter distance in order to minimise aircraft noise impact on areas near the airport ; and 所有向东北方向起飞的航机须采用国际民航组织所订定的消减噪音离场程序，在较短距离内爬升至较高的飞行高度，以减低飞机噪音对机场附近地区的影响；及
Flying time hit maxmum 5 hours , natural falling speed is about 0 . 5 mts second , max . anti - wind at 5 grade , flying speed at 20 - 80 kms hour , height at 15 - 200 meters , effective controllabe radius 1 . 5 kms . the operators are nationally trained personals who drive the no - person - driven aircrafts professionally 飞行时最长达5小时，自然下降高度为每秒0 . 5米左右，最大抗风5级，飞行速度为20 - 80千米小时，飞行高度为15 - 200米，有效控制半径1 . 5公里。
Because the well reservation of the advantages of traditional large sacle advertising airboat , thoughtful design and argumentation on every level has been made , the dimension of the airboat reduced to 9 - 16 meters , adaptable area remarkably increased , flying agility obviously improved , a place as large as a playground is enough for it s taking off or landing , a space as size as a bus warehouse is sufficient to store the airboat , the advertising area of the airboat on it s two sides become less to 9 - 12 square meters , the altitude where such airboat can fly is much lower than that that drives person , presenting a little difference in views of the people on the ground , so capable to take the place of human - driving airboat , on the other hand when the size reduced , the operation , use , freight and maintenance become very easy , easy operation become it s first advantage : remote controllable , no professional driver needed , common personal can operate it after a short trainning , trainning time ranges from 3 - 5 days single , 15 - 30 days for people 是因为它完美的保留和发展了大型载人广告飞艇的优势，为此我们进行了方方面面且深入细致的设计和论证，首先缩小了飞艇的尺寸， 9至16米长，大大的增加了飞艇的适用范围，使飞行的灵活性得到了改善，学校操场大小的地方就可从容的起飞降落，大客车或大货车的车库便能存放，广告面积虽然也小了，每单侧9至12平米，可遥控飞艇的飞行高度也比载人艇的飞行高度低很多，以地面的视觉效果来看效果相差非常小，足以代替载人艇，其次是飞艇缩小后，整艇的操作使用运输维护也都大大的简化了，操作简便是它的第一大优点：由于是遥控飞艇，就不需要专业的驾驶员来操作，普通人经过短期的技术培训就可胜任，培训期每单人为三至五天，多人视人数十五至三十天。
To solve the problems caused by the varieties of the missile dynamics with the difference of flight height , velocity and attitude angle in modeling the missile , in this thesis , the theory of variable structure model reference adaptive control is used to design a pitch channel autopilot based on a longitudinal missile model , the status equation using the measurable parameters of load and angular rate is established , and the methodology to choosing the reference model is discussed also , and the performance of the controller is analyzed by means of simulation 为了解决拦截弹气动参数随飞行高度、速度、姿态的不同，变化范围大，控制系统难以准确建模的困难，基于纵向平面拦截弹模型，采用模型参考变结构控制理论设计了俯仰通道姿控复合控制系统，以可测量变量过载和角速度作为状态量建立了系统的状态方程，讨论了参考模型的选择方法，并对系统的性能作了仿真分析。
