查询词典 SAR

In this paper, an SAR simulation system was designed based on HLA, the framework and each federate member of the SAR system were designed using object-oriented modeling method, and a data transfer standard in the simulation system was proposed.

本文基于HLA的分布式仿真结构，以面向对象的建模方法为指导，设计了SAR仿真系统的框架和各个联邦成员的仿真模型，提出了成员之间的数据传递标准。

This paper presents the speckle suppression technology which includes the soft threshold, the hard threshold and the Garrote function threshold method. It gives the contrast result of the three method. Analyzed the embedded zero-trees wavelet coding method, it presents a SAR image coding technology with the speckle suppression. Finally, it presents a compressed SAR image with the speckle suppression.

摘要该文讨论了相干斑抑制技术中软阈值、硬阈值和Garrote函数去噪的方法，并对这些方法进行了比较；文中在讨论了嵌入式零树编码技术的基础上，提出了采用基于相干斑抑制技术的图像编码方法，利用该方法实现了对SAR图像数据的编码处理，给出了相应的处理结果。

Modeling experiments on real SAR images demonstrate that the heavy-tailed distributions based on the generalized central limit theorem can accurately describe the sharp-peaked and heavy-tailed statistics of high-resolution SAR images.

真实SAR图像的建模实例表明，基于广义中心极限定理的拖尾分布可以精确描述高分辨率SAR图像的尖峰和厚尾的统计特征。

Satellite SAR has aptotic earth-circling period, and can cover wide ground area. And with its development, satellite SAR images are widely used in cartography, land use, damage assessment, geognosy, hydrology, ocean, glacier, etc.

星载SAR具有固定的运行周期、地面覆盖范围广，随着它的不断发展，星载SAR图像也已经广泛应用于制图、土地监测、灾害监测、地质、水文、海洋、冰川等许多方面。

Because SAR has been developing at full speed in recent years, the amount of the SAR data is increasing in the way of geometric progression,and the existing data transmission system can not fully fit it anymore.

随着SAR 技术的飞速发展，高分辨率星载SAR输出数据速率大幅度增加，现有的数传系统数据率较低无法满足实时下传的需求。

The new method was demonstrated by spaceborne SAR image. It is a good way for speckle reduction for SAR images.

用实际数据进行检验，并和常规方法得到的结果比较，验证了本算法的有效性。

By TM images the linear structures, water system, the outer edge of Tianchi Volcano trachite are extracted. By the sensitivity of SAR images to geomorphology, the distribution of parasitical volcano cone and lava fornix around Tianchi volcano are interpreted. With the aerial photos the parasitical lava of Qixiangzhan, Baiyun and Bingchang stage are filtered. At the same time by orthogonal cross-course wavelet transform, texture analysis is carried on to ERS-2 SAR images, and the texture characters are filtered. On the basis of the spectrum character of multi-band of TM images, multi-band algebraic grouping is made, and the factor of texture character factor and band grouping of TM images are input to BP neural network classification model. The good classified results are received.

利用TM图像对线性构造、水系、天池火山粗面岩锥体外边缘的提取；利用SAR图像对地形敏感特性，提取了天池火山周围寄生火山锥体及熔岩穹丘的分布；利用航片对天池火山口周围的气象站期、白云期、冰场期等寄生喷发物进行了提取：同时利用正交小波变换对ERS-2 SAR图像进行了纹理分析，提取了纹理特征：根据TM图像不同波段的光谱特征，进行了波段代数组合，并把纹理特征参数与TM图像的波段组合及DEM一起输入BP神经元网络分类器，取得了较好的分类效果。

This paper focuses on the job of building a practical program of map geocoding based on analysis of satellite SAR image. Map geocoding is one of procedures in post-processing of satellite SAR image.

为了使地理编码的过程成为一个流程，一个可以产生数据产品的处理过程，本文在分析和研究星载SAR图象地理编码的基础上，把重点放在建立一个实用的地理编码程序的工作上。

Firstly, Dempster-Shafer is developed by not only considering the certainty of the evidence, but also considering the average support of the evidence to different subsets in the assignment framework so that it can give more reliable combination result. Secondly, amplitude ratio feature and Euclid distance of the probability density distribution function in Pearson graph from different temporal SAR images are extracted to present change feathers in different scales. Finally, the improved Dempster-Shafer algorithm is applied to fuse the two different features to detect change information of SAR images.

首先通过综合考虑证据本身的确信度和证据对辨别框架中子集的平均支持度进行证据间的加权合成，改进证据理论对证据的合成，提高其可靠性；然后提取不同时相图像间的散射幅度的对比度和概率密度分布函数在皮尔逊图中的欧式距离，两种特征参数代表了像元级和区域级不同空间尺度下微波遥感图像中关于地表变化的信息；最后将改进的证据理论用于两特征之间的融合处理，得到地表的变化信息。

As a kind of imaging radars, synthetic aperture radar improves its resolution by means of moving and emitting pulse repetitiously. The issues about target detection of SAR are often a 憄ost-process?of the SAR imaging.

合成孔径雷达(synthetic aperture radar，简称SAR)通过对地面目标的多次照射来提高方位向上的目标分辨能力，由此使现有的SAR目标检测算法通常是一个基于SAR图像的"后处理"过程。

But GST= 0.156, Nm=1. 588. As a result, the foundation of Youyongchi Avicennia marina population was the result of the migration of hypocotyles and human factors.

这项工作可以为海岸防护林中新引进种类的判定以及为研究种群建立者效应方法的确定提供科学依据。

The two-dimensional CDRC-ADI-FDTD update equations for collision unmagnetized plasma are induced. The unconditional stability of the CDRC-ADI-FDTD formulation for collision unmagnetized plasma is obtained by the examples.

推导了碰撞非磁化等离子体中的二维CDRC-ADI-FDTD迭代公式，并用算例验证了碰撞非磁化等离子体CDRC-ADI-FDTD算法也是无条件稳定的。