雷达

Aimed at the optical radar system that commonly used by shooting range,based to the light-wave radial′s operation trajectory in atmosphere,and using the method of successive approximation,we obtained an applied atmospheric refraction error correction method of optical radar.

针对靶场常用的光学雷达系统，根据光波射线在大气中的运行轨迹，利用逐次逼近法得到了实用的光学雷达大气折射误差修正方法。

In this paper,the formula of ranging MSE root of multiple frequency CW radar is concluded when the quantification noise is considered.

对基于FFT数字比相技术的多频连续波雷达，量化噪声必然对雷达的测距精度具有一定的影响。

Then based on the results, the characteristics of radar stealth of a naval vessel were analyzed.

建立以某舰船为参照的艏向与正横向的近似二维模型，基于二维时域有限差分法计算舰船的艏向与正横向在不同频率入射波情况下的雷达散射截面，并根据计算结果对某舰船的雷达隐身特性进行分析。

Then, BAE Systems in funding from the Department of Defense launched the "European Nighthawk"Ⅰ/Ⅱ(Nightjar Ⅰ/Ⅱ) research project, located in the Wharton's radar cross-sectional area test test UCAV design a variety of radar scattering.

随后，BAE系统公司在国防部的资助下开展了"欧夜鹰"Ⅰ/Ⅱ（Nightjar Ⅰ/Ⅱ）研究项目，在其位于沃顿的雷达截面积试验场测试了多种UCAV外形设计的雷达散射特性。

Secondly two different clutter suppression methods are proposed according to the clutter characteristic of airborne radar with cylindrical array antennas, which can resolve the problem of clutter spectrum's nonhomogeneity at range.

然后根据圆柱型阵机载雷达杂波分布特点提出了两种不同的杂波抑制方法，它们能够很好地解决圆柱型阵机载雷达杂波距离向分布非均匀的问题。

In directional radar the directional characteristic is affected by nonideal sum and difference performance caused by small mismatch of microwave bridge port.

在定向雷达中，微波和差器的不理想性，对单脉冲雷达定向特性构成了一定的影响，这种不理想性主要由组成和差器的微波桥各端口的小失配形成。

Combined with the basic principle and method of the radar multitarget resolving ,the application of time frequency analysis is discussed for nonrigid multitarget resolving.

从雷达多目标分辨的基本原理和方法出发，探讨了时频分析在雷达非刚性多目标分辨中的应用问题。

And the tidal ellipse rotating zero line of the M_2 constitunent is located near to the Futou bay,which is much norther than that reported in previous result.

就海流观测，OSMAR2003地波雷达的观测能力达到了国外同类产品的水平，且雷达在运行期间的测度稳定。

As one part of the project, the dissertation is developed with thelocalization problem in mobile robot navigation. Combined with "MobileRobot 1 of Central South university (MORCS-1)", a mobile robot designed byus that equipped with a 2D laser measurement system to sense the environmentand the proprioceptive sensors such as the odometry, gyroscope to calculate itsdead reckoning, the approach about the four kind uncertainty factors of mobilerobot localization is studied. These researches include that the error analysisand calibration of position sensors is implemented to reduce the measurementnoise, the 3D kinematic model of mobile robot is built to gain the accuratepose in complex terrain, some work on the automatic detection of static ordynamic obstacles based on laser scanner is investigated to eliminate thedynamic influence of the environment and to realize the reliably absoluteposition, and lastly a robust algorithm is presented to involve the incrementalenvironment mapping and self-localization of mobile robot with unknown dataassociation and to improve the self-localization performance of mobile robotunder unknown environment.

作为该项目研究的一部分，本论文以移动机器人导航中的定位问题为研究内容，利用自行研制的装配有二维激光雷达环境感知系统，并通过里程计、陀螺仪等内部传感器来实现航迹推测的移动机器人"中南移动1号MORCS-1"，重点围绕影响移动机器人系统定位的四类不确定性处理展开研究：通过移动机器人定位传感器的误差分析及校准，旨在消除传感器噪声所带来的测量误差；通过建立移动机器人的三维运动学模型进行航迹推测，以期实现复杂地形下精确的移动机器人本体姿态感受；通过基于激光雷达的动静态障碍的自主检测等相关研究，尽量消除环境的不确定因素影响进而实现可靠的移动机器人绝对定位；通过以上研究，针对未知数据关联下移动机器人增量式环境建图与自定位的研究提出一种鲁棒的滤波算法，改善未知环境中移动机器人自定位的性能。

Aim at this problem,this article constructs the model about radar jamming resource distribution of warship,which established with the theory of multi-objective fuzzy optimum dynamic programming.

在现代海战中，需干扰的敌目标雷达多而我方雷达干扰资源有限是电子战军官面临的一个棘手问题。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。