雷达

We first denoise the SAR image by Lee filter.Next,the maximum likelihood classifier based on different distribution was used for SAR and SPOT images(Based on Wishart distribution and multivariate Gaussian distribution respectively),to extract the conditional probability of each pixel for each class.

首先使用李式滤波器滤除全偏极雷达数据噪声，接下来同样是使用采用最大似然法来分类融合影像，(不同的在于全偏极雷达影像使用Wishart几率分布，在光学影像采用multivariate Gaussian几率分布)将每个类别中每个像元属于某个类别的几率值计算出来，再利用Dempster-Shafer evidence theory来结合这些类别的机率值。

Doesn't be processed and direct is adopted analog-to-convert,the dyn amic range of analog-to-digital converterin data acquisition circuit can't match the need of GPR system and the problem will affect the exploration depth and resolution of GPR.

探地雷达回波信号具有动态范围大、频带宽等特点，如果不对回波信号进行处理直接进行A／D转换，则会出现动态范围不匹配的问题，严重影响雷达的探测深度和分辨率。

The fundamental principle of PML is briefly introduced. The main performance parameters of PML were determined, and the results were analyzed. The typical detected results of extinction characteristic of aerosols and the structure of cirri at Hefei(117.16°E, 31.90°N) are presented and discussed.

对偏振-米散射激光雷达的性能参数进行了测定，并对测定结果进行了分析与讨论，给出了偏振-米散射激光雷达对合肥市地区(117.16°E， 31.90°N)上空大气气溶胶的消光特性和卷云的结构、退偏振比垂直廓线以及光学厚度的典型探测结果，对这些结果进行了分析和讨论。

A domelike shell transparent to radio-frequency radiation, used to house a radar antenna.

雷达天线罩有顶构造，可以让无线电频率辐射穿过，用于隐蔽雷达天线

Because of the existence of natural detecting blind area o f general radar on detecting flying object flying in veryˉ low altitude, it is so essential to put forward a suspended bomb t heory which would make use of sound wave's characˉ teristic parameters as its wavelength and spectrum to get the obje ct's direction and position, and to discuss its orientaˉ tion method and embattle model.

由于现有的常规雷达探测超低空飞行的来袭兵器有其固有的盲区，作为雷达的必要补充，利用声音的大小、频谱等特征能够反映声源的方位等特征参数的特性，提出了一种被动声学探测悬浮弹理论，并对其定位算法和布阵模式进行探讨，目的是防御拦截低空超声速巡航导弹。

So, the study in this dissertation focuses on some key points in theuncertainty treatment of mobile robot localization as follows: Combined with the multiple proprioceptive and exteroceptive sensors ofmobile robot MORCS-1, aimed at the drift error of fiber optic gyro as theproprioceptive sensor, the neural network using genetic algorithm as optimaltool is proposed to accomplish the modeling and calibration for temperaturedrift of fiber optic gyro, which can reduce the drift error to the standard outputat constant temperature; and aimed at the noisy disturbance of ranging datafrom the exteroceptive sensor laser scanner, a dynamic adaptive filter isintroduced through the analysis of neighboring ranging data in time and spatialcorrelation to realize the real-time and dynamic filter, which can validly filter the noisy disturbance to meet the requirement of the accurately real-timeobstacle detection in mobile robot navigation.

总结全文，在移动机器人定位的不确定性处理研究中，提出了一些具有一定创新性的方法：结合自行研制的移动机器人MORCS-1系统的多种内外部定位传感器，针对内部本体感受传感器光纤陀螺仪的漂移误差，提出采用基于遗传算法优化的神经网络来对光纤陀螺仪的温漂建模及校准，能够将其温漂变化控制在恒温条件下标准测试输出附近；针对外部环境感知传感器激光雷达测距数据中包含的噪声干扰，考虑移动机器人导航中激光雷达测距数据的时空关联性，提出采用动态自适应滤波技术进行预处理，从而可以有效滤除噪声干扰满足导航中障碍实时精确检测的要求。

Multi radar signal and AIS data can be merging displayed and integrated display radar signal, video map, hydrographical meteorology data and database file of the ship.

可将多雷达信号、AIS数据进行融合显示，并综合显示雷达信号、视频地图、水文气象数据及船舶档案数据。

For verifying the design scheme of the refractive diffractive incorporate antenna system, an experiment antenna system is accomplished which is used to compare its performance with the Keplerian antenna which has being used in the CO 2 coherent laser system.

引 言随着相干激光雷达的广泛应用，对于其小型化的要求越来越突出，尤其是用于机载，弹载等携带用途的成像激光雷达要求它的系统具有小型，轻便等特点，而考虑远距离相干外差探测的特点时，则要求主振激光器具有高发射功率，光学系统具有高像质，高效率。

Netlike Radar System is the trend of radar development at present.

组网雷达是目前雷达发展的趋势。

Non-cooperative bistatic radar plays an important role in Netlike Radar System for its excellent performance.

非合作式双基雷达由于其优良的&四抗&特性，在组网雷达中占有重要地位。

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。