空域

The main responsibility of Airspace Evaluation is to access and evaluate the airspace of a country.

空域评估主要是对一个国家的空域进行评价和估计。

This paper has compared distribution of residual stress on the surface between circular and rectangular cold drawn section steel, and how to relieve the residual stress by means of high temperature heattreatment.

文中论述了该系统中的盲棋子空域的划分，通过对几种可选方案：矩形、正六边形、圆形的分析和比较，得出了在无线电盲棋导航系统中以正方形作为子空域最优。

The airspace reform is an importance that controls the system reform to constitute the part, the target of the airspace reform: One is to adjust the airspace structure, reasonable programming airspace, make use of the resources well; Two is a reason agreeable the soldier sail to empty conductor relation, reduce coordination link, raise flight efficiency, guarantee flight safety.

空域改革是管制体制改革的重要组成部分，空域改革的目标：一是调整空域结构，合理规划空域，充分利用资源；二是理顺军航对空指挥关系，减少协调环节，提高飞行效率，保证飞行安全。

After the mathematic model of spatial spectrum analysis was introduced, interharmonic signals can be transformed to spatial signals received by linear sensor array through Euler\'s formula or Hilbert transform. The number of sinusoidal components of the interharmonic parametric model was corresponding to the source number of transformed spatial signals, and the frequencies of sinusoidal components were corresponding to that of transformed spatial signals.

3介绍了空间谱分析的数学模型，证明了间谐波信号经欧拉公式或希尔伯特变换后可以转变为空间线性阵列接收的空域信号，正弦成分数对应空域信号源数，正弦成分频率对应空域信号频率。

The method transfers the observed data from space domain to 2-D space-time domain by exploiting the cross-correlation of the array outputs,and a large amount of virtual elements are generated through space-time processing.Therefore the constraint over the array configuration and the element identity can be significantly weakened,which means the matching subarray is no longer needed and the advantage of the traditional DOA matrix method,such as automatical parameter alignment and no need of 2-D search,is still available.

该方法在保持原DOA矩阵方法无需二维谱峰搜索和参数配对等优点的基础上，利用阵元输出之间的互相关关系将空域的阵列观测数据变换到时空域，通过空时二维处理在时空域中衍生出大量虚拟阵元，从而大大减弱了传统方法中对阵列结构、排布方式和阵元一致性的约束，不需要匹配子阵，无冗余阵元与孔径损失，并适用于阵元排列不规则的阵列。

In this algorithm, multiple lag parameters and the spectrum correlation property are used to exploit the cyclic statistical information and time domain characteristics of signals sufficiently and ef-fectively. Moreover, this method remedies the lack of space domain information, and it is an extension from space domain to space-time domain. Therefore the ability to select the desired signals and supress the noise and interfering signals is improved.

该算法在利用信号的谱相关特性的同时使用了多个时延，将波束形成技术从空域扩展到了时空域，弥补了空域信息的不足，充分利用了信号的循环统计信息和信号的时域特征，提高了信号的选择能力和对干扰、噪声的抑制能力。

In the introductory part of this paper, brief history and fundamentals of Air Traffic Flow Management and Airspace Capacity Estimation are introduced, which is followed by the recapitulation of the essential features of airspace and the classification of the commonly-used airspace capacity models.

论文首先介绍了空中流量管理、空域容量评估的研究概况和基本概念，总结了空域的基本属性和常用空域容量模型的分类，并对空域容量的两种基本概念进行了定义和分析。

CONTROLLED AIRSPACE, An airspace of defined dimensions within which air traffic control service is provided to IFR flights and to VFR flights in accordance with the airspace classification.

受管制空域，一个范围明确的空域。在该空域内，仪表飞行规则飞行和目视飞行规则飞行有空中交通管制服务。

Normally aerodrome flight airspace includes such flight airspace as flying techniques (aerobatic, formation, instrument) flight airspace, scientific research test flight airspace, firing flight airspace, low-level flight airspace, super-low-level flight airspace, aeromarine flight airspace, nighttime flight airspace and holding airspace.

机场飞行空域通常包括驾驶术飞行空域、科研试飞飞行空域、射击飞行空域、低空飞行空域、超低空飞行空域、海上飞行空域、夜间飞行空域和等待空域等。

The FAA uses a variety of systems to manage SUAs and Air Traffic Control Assigned Airspaces, airspaces set aside for military and other types of training exercises.

FAA使用多种系统来管理SUA和航管指定空域以及军用空域和其他训练演习所用空域之外的空域。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。