基于MATLAB的语音信号时域特征分析

介绍了一种新的非平稳信号分析方法———局部均值分解(Localmean decomposition,简称LMD) 。LMD方法可以自适应地将任何一个复杂信号分解为若干个具有一定物理意义的PF ( Product function)分量之和,其中每个PF分量为一个包络信号和一个纯调频信号的乘积,从而获得原始信号完整的时频分布。本文首先介绍了LMD方法,然后将LMD方法对仿真信号进行了分析,取得了满意的效果,最后将其和经验模式分解EMD ( Emp irical mode decomposition)方法进行了对比,结果表明在端点效应、迭代次数等方面LMD方法要优于EMD方法。

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

采用Gabor小波方法计算不同尺度和方向的能量信息,根据这些信息确定了显著峰集合。根据显著峰集合,确定了纹理特征向量,并且把显著性作为权重引入到相似性度量。72T0 XX XTo1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreservedhttp://www.cnki.neto1994-2010ChinaAcademicJournalElectronicPublishingHouseAllrightsreservedhttp://www.cnki.net113.845230.8113.844230.78230.76113.843230.74温113842113.84123068230.66113.8400.64230.62方向(p=4)10向(p=4)436.8436.64364436温435.84358435.6435.443524310152025方向(p=3)方向(P=3)698ALa方向(P2)方向(p=2方向(p1)方向(P=1)350300制250方向(P=0)方向p=0)图5一幅颈椎间盘图像,及其在5个尺度下能量信息直方图图6一幅腰椎间盘图像,及其在5个尺度下能量信息直方图Fig 5 Energy histogram of cervical disc image at five scalesFig 6 Energy histogram of lumbar intervertebral disc at five scaleso1994-2010ChinaAcademicJournalElectronicPublishingHouse.alLrightsreservedhttp:/www.cnki.net171816161221212322122522201994-2010ChinaacademicjournalelectronicPublishingHouseAllrightsreservedhttp:www.cnkinet0.9直接 Gabor小波变换方法0.8改进 Gabor小波变换方法0.60.50.40.30.245678图像0.09直接 Gabor小波变换方法改进 Gabor小波变换方法0.07瞬回0.050.040.0I123456789图像图9针对第1组测试集的检索精度和召回率曲线Fig 9 Retrieval precision and recall for first test set0.9直接 Gabor小波变换方法改进 Gabor.小波变换方法0.70.60.40.30.20.1123456789图像0.09[-+直按 Gabor小波变换方法0.08一改进 Gabor小波变换方法0.070.060.050.040.03图10第2组测试集合0.02Fig 10 Second group of test set0.0123456789201994-2010ChinaacademicjournalelectronicPublishingHouseAllrightsreservedhttp:www.cnkinet201994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreservedhttp://www.cnki.net

完整的热敏打印机控制项目：PCB,BOM,CODE...

自适应滤波器的权威Sayed的大作，用大量的实例诠释自适应滤波器的各种算法原理，是不可多得的好书。ADAPTIVE FILTERSADAPTIVE FILTERSALIH SAYEDUniversity of California at Los Angeles◆旧EEEIEEE PressWIlEYNTERSCIENCEA JOHN WILEY SONS, INC, PUBLICATIONCover design by Michael RutkowskiCopyright C 2008 by John Wiley Sons, Inc. All rights reservedPublished by John Wiley Sons, Inc, Hoboken, New JerseyPublished simultaneously in CanadaNo part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or bymeans, electronic, mechanical, photocopying, recording, scanning, or otherwise, except as permitted under anySection 107 or 108 of the 1976 United States Copyright Act, without either the prior written permission of thePublisher, or authorization through payment of the appropriate per-copy fee to the Copyright Clearance Center,Inc, 222 Rosewood Drive, Danvers, MA01923, (978)750-8400, fax(978)750-4470, or on the web atwww.copyright.comRequeststothePublisherforpermissionshouldbeaddressedtothePermissionsDepartment, John Wiley sons, Inc, 111 River Street, Hoboken, NJ,(201)748-6011, fax(201)748-6008,oronlineathttp:/www.wiley.com/go/permissionLimit of Liability/Disclaimer of Warranty: While the publisher and author have used their best efforts inpreparing this book, they make no representations or warranties with respect to the accuracy or completeness ofe contents of this book and specifically disclaim any implied warranties of merchantability or fitness for aarticular purpose. No warranty may be created or extended by sales representatives or written sales materialsThe advice and strategies contained herein may not be suitable for your situation. You should consult with aprofessional where appropriate. Neither the publisher nor author shall be liable for any loss of profit or anyother commercial damages, including but not limited to special, incidental, consequential, or other damagesFor general information on our other products and services or for technical support, please contact our CustomerCare Department within the United States at(800)762-2974, outside the United States at (317)572-3993 or fax(317)572-4002Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may not beavailable in electronic formats. For more information about wiley products, visit our web site atwww.wlley.conLibrary of Congress Cataloging-in-Publication Data:Sayed, Ali hAdaptive filters/Ali H. Sayedp cmIncludes bibliographical references and indexISBN9780470-25388-5( cloth)Adaptive filters. I. TitleTK7872F5s285200862138l5324dc222008003731Printed in the united states of america10987654321To my parentsContentsPrefacexviiNotationXXVAcknowledgmentsXXXBACKGROUND MATERIALA Random variablesA 1 Variance of a random variableA2 Dependent random VariablesA3 Complex-Valued Random VariablesA 4 Vector -Valued Random variables3467A.5 Gaussian Random VectorsB Linear Algebra12B. Hermitian and Positive- Definite matricesB 2 Range spaces and nullspace of matrices14B3 Schur Complements16B 4 Cholesky factorizationB 5 QR DecompositionB6 Singular Value Decomposition20B 7 Kronecker productsC Complex Gradients25C 1 Cauchy-Riemann Conditions5C2 Scalar arguments26C3 Vector arguments26PART:。 PTIMAL ESTIMATIONScalar- Valued Data291. 1 Estimation Without observations1.2 Estimation Given Dependent observations1.3 Orthogonality Principl36CONTENTS1,4 Gaussian random variables382 Vector- Valued Data422. 1 Optimal Estimator in the vector Case422.2 Spherically Invariant Gaussian Variables462. 3 Equivalent Optimization Criterion49Summary and Notes51Problems and Computer Projects54PART I: LINEAR ESTIMATION3 Normal Equatlons603. 1 Mean-Square Error Criterion613.2 Minimization by Differentiation3.3 Minimization by Completion-of-Squares633.4 Minimization of the error Covariance matrix653.5 Optimal Linear estimator4 Orthogonality princlple4. 1 Design Examples4.2 Orthogonality Condition4.3 Existence of solutions744, 4 Nonzero-Mean variables5 Linear Models5.1 Estimation using Linear Relations5.2 Application: Channel Estimation5Application: Block Data Estimation815. 4 Application: Linear Channel equalization825.5 Application: Multiple-Antenna Receivers85Constralned estimation876.1 Minimum-Variance Unbiased estimation6.2 Example: Mean Estimation6.3 Application: Channel and Noise Estimation916.4 Application: Decision Feedback Equalization6.5 Application: Antenna Beamforming1017 Kalman Filter1047.1 Innovations process7.2 State-Space Model106

1、资料包含二阶环路设计简要说明，Matlab程序，Matlab程序模拟FPGA工作方式，对各变量进行了量化处理2、资料包含使用Vivado2015.4.2版本的工程文件，可直接运行查看仿真结果3、参考资料为杜勇老师的《锁相环技术原理及其FPGA实现》

基于pwm开关稳压电源设计，pdf格式，模拟仿真，原理电路

小波变换的3个MATLAB算法实现，另附有卡尔曼的MATLAB代码

ghost远控源码，VC6直接编译即可用！

好与不好，各位自己把握，内容是变频恒压供水系统，基于PLC的，希望能帮到大家，共同学习，共同进步！