空中探测

For the modern system of antiaircraft artillery, the diagrammatize positive arithmetic cannot effectively bring forth its campaign efficiency and power.

为了对付种类繁多、性能提高的空中威胁，现代高炮武器系统的构成越来越复杂，功能越来越齐全，已发展为集目标探测、信息处理、火力控制、运行和防护系统于一体的高集成化武器装备。

By establishing a model based on the law of infrared radiation transmission in atmosphere and the characteristics of infrared imaging system for the apparent contrast between the target and the background, and analyzing the model over two wavebands to formulate the distance measuring formula and the distance resolving power formula, a passive distance measurement method is proposed for aerial point target distance measurement.

提出了对空中点目标进行被动测距的方法。基于红外辐射在大气中的传输规律和红外成像系统的特性，建立了目标和背景的表观对比度模型。通过对两个波段上对比度模型的分析，推导出了测距公式和距离分辨率公式。理论分析表明，只要得到大气在两个波段上的消光系数，通过测量目标在两个波段、两个时刻上的目标表观对比度，即可计算得到目标距离和目标径向速度，而距离分辨率则取决于系统的对比度探测能力及相关参数。

N5A airplane has the layout of single engine, single pilot, low wing and fixed tricycle landing gears, and it is powered by an American Lycoming I0-720-D1B type 400HP piston engine and an American Hartzell constant three-blade metal propeller.

其中N5A型飞机采取单发动机、单驾驶、下单翼、固定式前三点起落架布局，可进行播种、施肥、除草、森林防火以及农林业病虫防治，经过简单改装后还可进行地质探测、空运、空中摄影、航空体育训练和航空旅游等作业，具有使用成本低、适用范围广、作业能力强、操作性好、安全性高的特点。

The novel locating system aiming at the noncooperation source will take the advantage of future war . By analyzing the energy of reflected signal of television and radio it can realize the location estimate in space .

而针对非合作辐射源的新型无源探测系统将取得未来战争优势，通过分析被目标反射的广播电视信号的能量，实现对空中目标的定位。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。