查询词典 flight

In this paper, the flow properties of helicopter landing and taking-off region and its influence on flight safety are introduced first, then the flow of flight deck is simulated using finite element method on the basis of Navier-Stokes equations, and the simulated results are compared with test results. The helicopter flight properties on flight deck is discussed, and it is point...

本文首先介绍了直升机舰载起降区域的气流流动特点及其对飞行的影响，然后以纳维—斯托克斯方程为基础，利用有限元法对甲板区域的气流流动进行了仿真计算，并将仿真结果与实验结果做了对比，分析了直升机在该甲板区域内的飞行特点，指出应重视流场对飞行安全的影响。

With these words he started to define the needs (= working conditions) for flat field thermal flight, slope flight and very fast slope flight and aerobatic flight.

他用这句话开始，以确定需要为单位场热飞行，坡度飞行，并很快边坡飞行和航空运动飞行。

The main function of the system is described, and data types of database and the operation modules of model-base are also discussed. The flight path marking model, protected-area auto-generating model, obstructer extracting model, obstructer threat evaluation model, flight conflict avoiding model and flight ordering model are used in flight procedure management. After sufficiently elucidating the system structure and function, the assistant decision-making process supported by the system for chief officers is analyzed finally.

首先描述了该系统的主要功能，讨论了系统数据库的数据类型和模型库的远行模块，指出通过航迹标称模型、保护区自动生成模型、障碍物提取模型、障碍物威胁程度评估模型、飞行冲突避让模型、飞机进场离场排序模型等对军机飞行程序进行合理管理，最后在对系统结构与功能充分阐释的基础上，分析了该系统为指挥员提供辅助决策的流程。

First, the angular velocity function and maneuver load for certain maneuver flight (including hover, dive-hike and these two combined) are set up. The simulation results of the vibration of double-disk rotor system with cantilever supported on rigid bearings show that rotor would be apparently deformed under maneuver load. Second, the performance of oil force of SFD in maneuver flight is analyzed. The results show that in maneuver flight, the SFD with centering spring will become eccentric and its oil force will be time-related and offset-related. Then, SFDs are introduced into typical Jeffcott rotor system. The whole system will be statically displaced in maneuver flight and the nonsynchronous components of oil force appear in the response of rotor system.

首先，建立了水平盘旋、俯冲拉起及盘旋+俯冲拉起复合机动三种机动飞行条件下的机动角速度函数，并确定了对应机动飞行条件下的机动附加载荷(附加离心力和附加陀螺力矩)，分析了带刚支的双盘悬臂转子系统在机动飞行条件下的振动特性，发现发动机转子在机动飞行时会发生明显变形；随后，分析了非定心挤压油膜阻尼器的油膜力特性，机动飞行时，油膜轴颈在机动附加载荷的作用下偏离外环中心，使得带定心弹支的挤压油膜阻尼器也变成了非定心挤压油膜阻尼器，其非定心挤压油膜力是瞬态时变的，并且与SFD油膜轴颈偏移量和进动形态有关；然后，在经典的Jeffcott转子系统中引入带定心弹支的挤压油膜阻尼器，分析了机动飞行时非线性转子系统的振动特性，发现挤压油膜阻尼器油膜力的非协调特性也反映到转子系统的振动响应中；之后，对机动飞行条件下带挤压油膜阻尼器的双盘悬臂转子系统的振动特性进行了分析，并重点分析、总结了俯冲拉起机动飞行时，系统结构参数和工作状态参数(转速比、机动飞行半径、机动角速度等)对该系统振动特性的影响。

Adaptive α-β filter algorithm was introduced, and then it was compared to ISR filter algorithm and Kalman filter algorithm, the mean square deviation of distance, position, speed and direction of these algorithms on the flight line was analyzed to discuss the specific use of the three filters in straight-line flight and about-ship straight-line flight.

介绍了一种改进的α-β滤波算法，然后将它和最小二乘滤波算法、卡尔曼滤波算法进行比较，对三种算法跟踪空中目标的直线飞行、改变航向的直线飞行两种情况的距离、方位、速度和航向等参数的均方差加以分析，证明了改进的。

Your flight is flight at 9:00 am, arrives at 3:00 pm You must arrive the airdrome at least half and a hour before the flight takes off.

您搭乘的飞机是早上9点起飞，下午三点抵达纽约，您必须在飞机起飞前至少一个半小时抵达机场。

The experimental results show that:(1) for ideal spheres, the attenuation coefficient of velocity is constant, the air drag coefficient is slightly affected by the initial velocity and is a linear function of initial velocity, and (2) for real fragments formed by a warhead, the flight performances are different from ideal spheres, the air drag coefficient is affected by the flight velocity and is a linear function of flight velocity.

实验结果表明：(1)对于理想球形钨合金破片，在同一初始速度条件下，衰减系数为常数，空气阻力系数与初始速度有关，两者成线性关系；(2)对于经历爆轰驱动的球形钨合金破片，由于有轻微的质量损失和变形，速度衰减规律与理想球形钨合金破片有明显的区别，空气阻力系数与飞行速度有关，两者成线性关系。

The entire flight process is the rocket's flight mechanics and celestial mechanics of the process, and sometimes is a typical rocket flight mechanics problems, and sometimes is a typical celestial mechanics problems.

整个飞行过程是火箭飞行力学与天体力学的过程，有时是典型的火箭飞行力学问题，有时是典型的天体力学问题。

30 After 15 minutes, Flight Management Office once again to fly to New Chitose Airport 515 flight crew confirmed the flight plan.

上午8点半后的15分钟内，运航管理室再次向飞往新千岁机场的515航班机组人员确认了飞行计划。

The book also includes interviews covering various aspects of space life sciences research, a chapter profiling NASA's relevant international and domestic collaborative efforts, and a chapter discussing the process of flight experiment implementation. Three appendices describe, respectively, the methods and results of over 200 flight experiments, resulting science publications, and associated flight hardware with illustrations.

它还涵盖空间生命科学研究的各个方面简介，一章包括NASA的相关国际和国内合作成果，一章讨论太空飞行试验实施的过程，三个附录分别描述200多次飞行试验的方法与结果，由此引发的科学出版物，以及相关飞行硬件，并附有插图。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。