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一种改善微弱信号信噪比的小波变换消噪法
通过分析小波变换处理信号噪声的方法及其在微弱信号检测方面的不够完善之处,提出适合于极低信噪比条件下小波消噪法的信号检测原理和方法,即通过构造具有可调功能的阈值函数以及对小波分解系数处理方式的优化设计等方法,在强背景噪声中提取出微弱的信号特征信息,从而实现微弱信号的检测。最后通过Matlab仿真验证该方法的实验效果,理论和实验结果均表明此方法能较大幅度地改善信号比。这里阈值构造过程中充分考虑到了信噪比因素的影响,并对小波分解系数的处理也进行了合理优化,从而使得去噪效果有较大的改善。
- 2021-05-07下载
- 积分:1
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无人驾驶入门--Autoware使用手册
无人驾驶汽车系统入门 - Autoware_UsersManual_v1.1Autoware-用于城市自主驾驶的集成开源软件,支持以下功能:3D本地化3D映射路径规划路径跟随加速/制动/转向控制数据记录汽车/行人/物体检测交通信号检测交通灯识别车道检测对象跟踪传感器校准传感器融合面向云的地图连接自动化智能手机导航软件仿真虚拟现实Autoware受BSD许可证保护。请自行负责使用。为了安全使用,我们为不拥有真正自主车辆的人提供基于ROSBAG的仿真方法。如果您使用Autoware与真正的自主车辆,请在现场测试之前制定安全措施和风险评估。工尹-刁一定義亡机飞求世。Chapter1。 About This documentThis chapter describes the purpose of this document.Autoware Users ManualAutoware Developers manualChapter2。 RoS and AutowareBefore operating Autoware, RoS and Autoware are described in this chapter.Robot middleware- rosecently, the wide range potential of robotics has been focused by not only roboticsexperts but also non-robotics experts to join robot development It is believed thatthis trend leads robotics to advancement and developments to other domainsHowever, robot development is getting harder because the advancement and the complexityof robot functions have been increased Unlike Pcs and smartphones robotic developmenthas considered various hardware, OS, programming languages. Hence, the differences havemainly been obstructed for robotic developers as well as robotics experts to join robotdevelopmentTo solve the problem, the demand of making common platforms has been increased, andsome platforms have been published Within a common platform, developers can combinevarious software published by other developers, and speed up development by reusing themTherefore, it is expected that developers can more focus on fields of interestROS (Robot Operating System) is a framework for robotic software development. It wasdeveloped by Willow Garage in U.S. OSFR (Open Source Robotics Foundation) has currentlymaintained it. The open sourced ros has mainly been used by communities in U.S. andEurope as well as communities in JapanNote that ros has "os" in its name however, it is not "os" like Windows or linux. It is amiddleware that runs on uniX based OSROS FeaturesOriginal build system(Catkin)mage processing library(OpenCvv Data logging tool (ROSBAG)v Visualization tools for data and software state(rvizCoordinate transformation library (TFQt based gul development tool (RQTA""file is used to start multiple nodes atAutowareutoware is open source software based on ros. autoware is pushed on github forautonomous driving research and development. Most of autonomous drivingsystem consist of recognition, judgment, and operation. Autoware providesnecessary functions, such as 3-D map generation, localization, object recognition, andvehicle control, for autonomous drivingROS PCAutoware〔Ros)RecognitionJudgmentoperationObject DetectionLane KeepingAcceleratorLocalizationIntersectionBrakeSteeringAutowareRiderAutoware routePath PlanningVehicleVehicle control(CAN)CFigure 1 Autoware overviewwhile support systems such as driving assistance and safetydiagnosis support, use multi-core CPU3-D Map Generation and SharingLocalization(NDT: Normal Distributions Transform)object DetectionPath GenerationAutonomous Drivingtarget speed. In addition, the route includes landmarks, "way point, setintervals. The autonomous driving system operates path following by following the wayUser InterfaceA user interface called " Runtime Manager ofpath following. Furthermore, a tablet user interface, "Autoware Rider, of Autoware enablesROS PCAutoware(ROS)Runtime ManagerVIZAutoware ridertabletDisplay on vehicleOculusFigure 2 User interfacePlatform structure for autowareApplicationAutowareMiddlewareROSHost OsLinux( UbuntuCPUGPUCameraGNSSLIDARFigure 3 Platform structure for Autoware
- 2021-05-07下载
- 积分:1
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计算电磁场的矩量法部分程序的MATLAB实现
第一题:矩量法算例 1伽略金法 11. 思路 12. 结果 33. MATLAB代码 5点选配法 101. 思路 102. 结果 113. MATLAB代码 12分域基法 141. 思路 142. 结果 153. MATLAB代码 16第二题:带电导体板 20计算平板电容 201. 思路 212. 结果 223. MATLAB代码 24第三题:导电柱散射 27TM下导电柱散射 271. 思路 282. 结果 313. MATLAB代码 33第四题:线天线 38线天线的矩量法求解 381. 思路 382. 结果 423. Fortran代码
- 2020-12-05下载
- 积分:1
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三种esprit算法实现doa估计
三种esprit算法的doa估计matlab实现。参考张贤达《通信信号处理》的算法。包括两种普通esprit和TLS_esprit算法。经检查无误。
- 2020-07-04下载
- 积分:1
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LMD分解信号,提取样本熵的特征,完美运行,你指的拥有。
将实验的数据进行lmd分解,得到分解的pf分量通过求相关系数来说筛选分量,在求出分量的样本熵构造一个样本的样本熵的特征向量,你指的拥有,有帮助的话,希望你好评,谢谢,有问题加我主页qq。
- 2021-05-06下载
- 积分:1
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多种核函数的SVM分类器matlab程序
该代码包括了SVM的多核核函数的分类实现和可视化展示。
- 2020-11-28下载
- 积分:1
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结构仿真分析ansys应用
本书分为基础知识和实例分析两篇。基础知识篇介绍了仿真的基本概念、仿真技术的应用与发展方向以及结构仿真分析软件ANSYS 的基本功能, 结合实例对其基本操作方法进行了说明。实例分析篇中, 对如何应用ANSYS 仿真分析软件对结构力学性能进行仿真分析的过程和步骤进行了较为详尽的介绍, 包括线性静力分析、非线性分析、动力学分析、热力学分析中结构几何模型创建、有限元模型生成、材料属性的设置、载荷的施加方法和问题求解以及后处理检查分析结果等内容; 作为ANSYS 高级技术应用, 结合实例对ANSYS结构优化设计和可靠性分析过程进行了简要介绍。
- 2020-12-09下载
- 积分:1
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混沌系统的图像加密
提出了一种基于级联混沌系统的图像加密算法。实验结果表明,这种加密算法具有高度的安全性和有效性。关键词: 图像加密算法;混沌;级联混沌 目前混沌加密己成为密码学研究的热点之一,但已有的大部分混沌加密算法都是基于单个混沌系统的。事实表明,一些混沌映射可通过相空间重构的方法精确预测出来[1]。另外,由于计算机精度的限制,单混沌系统输出的时间序列并不能达到理论上的完全随机,而可通过多个混沌系统的级联使1382002GDCTK LP(M/K)(NIL). PS DCT(M/K)(N/L)],i=h,j=G[0,1GSm=88(k=1,2,,M/8Sign(nn)ⅠB.IBIlByDCT2,,M/K,j=1,2,,N/L),IB=j+(-1)(N[O,1,,31L). IPⅠP3.3K L)SteplIBi= pImmage3.2.3Outl mageInl mageStep2.(1k(k=1,Out/ mageyhSkm DCtep2.(1)rk yk(= 1,g km10.88 DCTJPE GPGDCTIPEJPEG3.2.43.3JPEGMPEG, JPEGx0=0.60773).2en aDCTx0=0.60773)Huffman[2,8]JPEG1d.2d0=0.60772SG3DCT3a,3b3 cJPEG90DCTDCTa Lena原图b加密图像c解密恢复的图像d密钥错误解密的图像1994-2012 China academic journ图Hlec图像筐國咖密解密铺果. All rights reserved.htt:ww. cnkinet139B enn原图b加密图像c解密恢复的图像d密钥错误解密的图像图2图像域加密与解密结果a随机噪声b均匀噪声C JPEG压缩图3加密图像的失真对解密图像的影响[4] C Shi, B Bhargava. Light -w eight M PEG video encr yption agorithm Al. In: Pr oc ee dings of the Int ernat ional ConferenceDelhi, India, 1998. 55 6[5 Josef Scharinger. Fast en cry pt ion of image dat a usin g ch aot iKolm og or ov flows[A]. In: Proceedings of E lectronicImaging 97, Security and Watermarking of Multimed ia Conten ts, S an Jos e,1997,3022:278289[6 Qi Don gxu, Zou Jiancheng. et al. New scramble tr ans form a-tion and applic at ion in inform at ion hiding[ J]. Ch inese Science(E),20,030(5):440447( in chinese)E),2000,30(5):440447)[1 Li Y uh uan. Comb inat orial Mathem at ics[ M I. Beijing: Beijing [7] Hui Xiang, et aL. D igital water ark ing sys tems w ith ch icNormal College press, 1998( in Chinese)sequences[ A]. In: Proceedings of Electronic Imaging99, Se-M,1998)cu rity and Waterm ark ing of Multimedia Contents, SPIE, San[2] Wu M insh eng, Wang Jiesheng. L iu Shen quan. Perm ut at ionJose,1999,3657:449457transformation of image[ J]. Chinese Journal of Computers, [8] Yi Kaixiang, Sun Xin, Shi jiaoy ing. Chaotic sequences bas ed1998,21(6):514519 in chines e)image encry pt ion alg or ith m[ J]. Journ al of Computer-A idedDes ign Com puler Graph ics, 2000, 12(9):672 676(in Chi-1998,21(6):514519leseWei, Qi Don gxu. Digit al image tran format ion and in-format ion hiding and dis guisin g techn ology[ J]. Chin ese Jour2000,12(9):672nal of Computers, 1998, 21(9):838 843( in Chinese676)1998,21(9):838843)o1994-2012ChinaAcademicJournalElectronicPublishingHouse.Allrightsreservedhttp://www.cnki.net
- 2020-12-09下载
- 积分:1
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EKF,UKF,PF2 三种滤波算法的比较
完整的EKF,UKF,PF三种滤波算法的比较,包括状态估计,误差比较,和置信区间。
- 2020-11-29下载
- 积分:1
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l1-ls 范数求解matlab程序包
最优化问题求解,l1-ls 范数求解matlab程序包。
- 2020-12-11下载
- 积分:1