oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 86 )

2018 ( 1581 )

2017 ( 1578 )

2016 ( 1731 )

Custom range...

Search Results: 1 - 10 of 72121 matches for " 寇光杰 "
All listed articles are free for downloading (OA Articles)
Page 1 /72121
Display every page Item
方位多波束星载sar原始数据仿真

遥感技术与研究 , 2012,
Abstract: 方位多波束(mab)技术可以有效解决方位向分辨率和距离向测绘带宽的矛盾,但目前仍没有以提高方位向分辨率为目的的mabsar投入运行,因此对该模式的研究只能通过仿真进行。目前公开发表的文献在模拟mab模式时均附加了过多限制条件,使得仿真结果与实际情况有较大差异。首先介绍了mab工作原理和回波模型,然后给出了在考虑地球自转及偏航控制等与实际情况更加吻合的条件下,mab系统中原始数据的模拟方法,并提出了mab系统中方位向相位误差仿真的方法。所给出的仿真方法及结论对于进一步进行mab技术的研究有重要的参考价值。
时间序列中的协变量调整非参数回归模型
马云艳,
应用概率统计 , 2015,
Abstract: 在某些场合,回归模型中的预测变量与响应变量不能被直接观测,而是受到某个可观测变量的影响,在这种情况下人们提出了协变量调整模型.本文在时间序列场合下讨论协变量调整非参数回归模型(CANR),提出了回归函数的两步估计法,在-混合条件下讨论了估计的大样本性质,最后研究了模型在模拟和实际金融数据中的应用.
融合SRADPRO和SCM模型的SAR图像分割
,马云艳,岳峻
- , 2016, DOI: 10.13190/j.jbupt.2016.01.023
Abstract: 摘要 将改进后各向异性扩散相干斑抑制算法(SRADPRO)用于合成孔径雷达(SAR)图像相干斑抑制,并和脉冲发放皮层模型(SCM)结合,提出一种自适应SAR图像分割算法.该算法首先计算SAR图像均匀采样区的标准差,并以此评价SAR图像中相干斑的影响程度,进而自适应地决定是否采用SRADPRO进行降斑处理,然后再利用SCM进行图像分割.由于SCM的自动波扩散机理,使得该算法在获得分割后的SAR目标的同时,也得到了目标边缘检测结果.与多种常规算法的比较结果证明了SAR图像分割算法的有效性.
An improved speckle reducing anisotropic diffusion (SRADPRO) algorithm was adopted to reduce the speckle in synthetic aperture radar (SAR) image. An adaptive SAR image segmentation algorithm speckle reducing spiking cortical model (SRSCM) was proposed when SRADPRO and spiking cortical model (SCM) was combined. In SRSCM, the standard deviation was calculated through a uniform sample region in the SAR image, and then the effect degree of speckle can be estimated as a result whether to employ the operator of SRADPRO was determined. At the second stage, the SCM operator was executed. Because of the auto wave characteristic of SCM, the segmented image and edge detection result can be obtained together. The effectiveness of SRSCM was proved by the comparisons with several traditional algorithms.
Filtering methods for different characteristic stripe noise in SAR image
SAR 图像中不同特性条纹噪声的滤除

KOU Guangjie,WANG Zhensong,YAO Ping,
,王贞松,姚萍

遥感学报 , 2011,
Abstract: We analize the reason of periodic bright and shadow stripe noise generated in burst mode SAR, when the full aperture imaging algorithm is used. A simple but efficient one-dimensional frequency domain filtering method is proposed along with the flow chart of improved Range Doppler imaging algorithm including this operation. We discuss the nonperiodic abnormal stripe noise due to the spaceborne SAR system itself, and present an area filtering method in two-dimensional frequency domain. The validities of the algorithms in the paper are proved by processing actual spaceborne SAR data.
Imaging of spaceborne ScanSAR with multiple azimuth beams
星载方位多波束ScanSAR 成像

KOU Guangjie,WANG Zhensong,YAO Ping,
,王贞松,姚萍

遥感学报 , 2010,
Abstract: This paper proposes a novel work mode of spaceborne ScanSAR with multiple azimuth beams, where the range swath coverage can be greatly extended while the azimuth high resolution remains unchanged. Based on the analysis of the characteristics and main phase errors of this mode, the compensating methods for these errors are given. Then the echo data simulating methods for this mode are introduced and the corresponding imaging algorithms are discussed as well. Thus the feasibility of this mode and the validity of the compensating methods are proved by simulation.
基于采样数据的时延多智能体系统的动态路径跟踪
杨洪勇,张玉玲,,丁宏
电子学报 , 2013, DOI: 10.3969/j.issn.0372-2112.2013.09.014
Abstract: 研究了具有动态Leader的时延多智能体系统的路径跟踪样本控制.假设由n个智能体个体和一个Leader组成的多智能体系统是一个有向加权网络,其中Leader作为有向网络的全局可达节点.本文应用Hermit-Biehler定理研究了具有动态Leader的时延多智能体系统的样本控制,通过对时滞闭环系统分析得到了基于采样数据的时延多智能体系统的路径跟踪的充要条件.最后仿真验证了结论的有效性.
仿生自然计算研究综述
,马云艳?,岳峻?,邹海林?
计算机科学 , 2014,
Abstract: 介绍了仿生自然计算这一新兴交叉学科的含义及研究范围,讨论了仿生计算与其它自然计算分枝的关系。将几种常见种仿生自然计算模型,按照人类社会、生物群体、个体、组织器官、细胞、分子等不同的层次进行了分类综述,并介绍了各种算法的最新研究进展。
一种基于视皮层神经元模型的彩色图像签名算法
,马云艳?,岳峻?,邹海林?
计算机科学 , 2015,
Abstract: 针对彩色图像签名问题进行了研究,基于哺乳动物视皮层神经元工作原理,提出了一种三通道脉冲发放皮层模型tscm(triple-channelspikingcorticalmodel),实现了对彩色图像不变性特征的有效提取。tscm模型不但具有常规脉冲耦合神经网络签名算法的平移、旋转、缩放不变性,而且算法更加简洁高效,对于噪声影响具有更强的鲁棒性。实验仿真结果验证了该算法的有效性。
膜计算在图像处理中应用的研究进展及展望
,马云艳?,岳峻?,邹海林?
计算机科学 , 2014,
Abstract: 膜计算是仿生自然计算中新兴的一个极具潜力的学科分支。首先介绍了膜计算的概念、分类和定义;然后从图像分割、增强、细化等几个不同的应用层面对膜计算系统在图像处理领域的应用情况进行了分类综述,并分析讨论了有关膜计算实现方法的最新进展;最后对膜计算系统在图像处理领域的应用研究进行了总结展望。
我国农产品产销对接的创新路径与机制研究


- , 2016,
Abstract:
Page 1 /72121
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.