查询词典 radars

The technology of digital signal processing has been used in many new radars so that it can improve their performance and make them adapt to the environment.

许多新一代雷达都采用了数字信号处理技术，使雷达的潜在性能得到了进一步的发挥，适应环境的能力进一步加强。

America already has the world's most developed space monitoring system with a network of radars and telescopes.

美国一直都拥有全球最发达的由雷达和望远镜网络组成的太空监测系统，但其侦察零散不全。

The proposed approach can also be applied to the upgrade of conventional non-coherent radars.

该方法也适用于常规非相干雷达的升级。

One major opportunity was to build missiles to home in on enemy radars, destroying them.

还有一个重要的手段是制。造导弹将敌军的雷达瞄准并摧毁。

Some of the key techniques are outlined on the basis of several typical laser radars.

以几种典型激光雷达为例，概括了激光雷达研究中需要解决的部分关键技术。

According to the function of distributed emulator, optical information processing and image multi-object tracking system, the following three aspects were emphasized in this dissertation. Firstly, a vast virtual terrain, ground radar models and canyons were created for the distributed emulator with modeling software Creator. The radars were driven to scan during emulating and the real time terrain code was sent to Radar module. Secondly, an optics channel simulating the optics camera of a virtual aircraft was implemented with simulating software Vega. The 2-D information got from the channel was translated and sent to multi-sensor information fusion system as an optics information source. Thirdly, the dissertation studied some motion estimation methods and analyzed the factors which influence the speed and the precision of the block matching algorithms. Then an improved block matching method was proposed for image multi-object tracking system and applied in the system combined with frame difference method.

论文根据多传感信息融合实验系统中的分布式飞行仿真系统、光学信号处理器和图像多目标跟踪系统三个子系统的功能要求，具体完成了以下三方面的工作：首先利用建模软件Creator创建分布式飞行仿真系统中的大面积地形、场景中的地面雷达模型和峡谷地形，并在仿真过程中实时驱动雷达模型的扫描，同时为后续雷达仿真模块提供实时地形编码；其次利用仿真软件Vega，在分布式仿真系统中为光学信号处理器设计实现了光学通道，模拟飞行器的光学摄像机的功能，并且对由此通道获得的目标二维光学信息进行转化处理，作为光学信息源发送给后续的多传感信息融合器；最后针对图像多目标跟踪系统，在研究图像分割运动估计算法的基础上，通过分析影响块匹配算法速度和精度的因素，改进了块匹配运动估计算法，结合差分法可应用到目标跟踪系统中。

Because the THz is between the millimeter wave and the infrared, it is difficult to produce the THz radiation resonance. But the application such as the radars and far distance detecting need great power THz resource. The gyrotron is the only device who can produce great power THz wave.

由于THz波段处于毫米波与红外线之间，THz辐射的产生困难很大，目前THz源的输出功率大多在毫瓦数量级，对于雷达、远距离探测等重要应用，需要瓦级以上的大功率THz辐射源，回旋管是目前唯一可在THz波段实现大功率输出的器件，其输出功率可达千瓦量级。

When the radars make their decisions asynchronously, a preliminary discussed method is presented, and the results are simulated.

针对雷达判决异步的情形，进行了较为深入的分析，并利用仿真试验验证了算法的性能。

Today it is one of the most heavily militarised places on Earth,a land teeming with tanks,infantry,mobile radars and surface-to-air missiles.

今天，这里是地球上最高度军事化的地区之一，随处可见坦克、步兵、移动雷达和地对空导弹。

Army development of surface-to-air radars was intensive, both in early-warning and in gun control.

无论用于早期预警还是火力控制，陆军对地对空雷达的研制都非常坚决。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。