李兴华2016年java课堂笔记

国外一大学多人合作，有200多个子程序，是MATLAB和C++混合编程。整个物理层的仿真程序。非常强大。

很经典的教材雷达原理的ppt，第四版，非常棒

基于有限元分析软件ABAQUS的Johnson-Cook材料模型以及断裂准则模拟高速切削淬硬钢锯齿状切屑形态,并讨论刀具前角和锯齿状切屑形态对切削力的影响。研究表明仿真结果和试验结果是一致的,文中介绍的有限元模拟方法可以准确地模拟并预测高速切削淬硬钢时的切屑形成过程。刀4有限元模拟及试验结果将有限元模拟仿真预测的切屑形态与试验结果进行比较,如图2、图3、图4所示。预测的切屑形态结果以积分点处等效塑性应变( equivalent plastic strain,PEEQ)的形式显示。由图中可以看出,有限元预测的切屑形态与试验结果非常接近。图中PEEQ的最大值随刀具前角从-10°改变到10而逐渐减小,说明主剪切(a)锯齿状切屑显微照片(b)锯齿状切屑形态有限元模拟结果区内的切屑变形也随刀具前角的增大而减小。刀具前(a) A micrograph of(b) fe simulation result of serrated角对切屑形态有重要影响,当使用负前角时容易形成serrated chipchip morphology锯齿状切屑。图4锯齿状切屑形态有限元模拟仿真与试验结果的对比(Fig 4 Comparison between experimentally and numerically obtained80.70.6hI号0.5H总0.4(a)锯齿状切屑显微照片(b)锯齿状切屑形态有限元模拟结果(a)a micrograph of(b)fe simulation result of serrated肥0.2●试验结果 Experimental resulserrated chipch0:→摸拟结果 Simulation result图2锯齿状切屑形态有限元模拟仿真与试验结果的对比(yo=-10)1010Fig 2 Comparison between experimentally and numerically obtained刀具前角 Tool rake angle(°)chip morphology (Yo =-10)图5不同刀具前角条件下的锯齿化程度Fig 5 Sawtooth degree under different tool rake angles4000003600320.l6000012000(a)锯齿状切屑显微照片(b)锯齿状切屑形态有限元模拟结果4000(a)A microgram(b)FE simulation result of serrated0.000.050.100.150.20serrated chchip morphology时间Time×103/s图3锯齿状切屑形态有限元模拟仿真与图6锯齿状切屑形成时的切削力波动(y6=-10)试验结果的对比(y0=0)Fig 6 Efect of tool angle on the cutting force(%o =-10Fig 3 Comparison between experimentally and numerically obtained加而逐渐降低。刀具前角对切削力也有很大影响,如图6、图7和图8所示,平均切削力F的值随着刀具刀前通常使用锯齿化程度C9表示锯齿状切屑变形和角的增加而逐渐降低。切屑形态。Gs的定义如下Gs =(H-h,)/h(4)5结论Gs的测量方法如图2所示,Gs与刀具前角之间的关系本文的目的在于预测高速切削过程中的切屑形如图5图5说明模拟结果与试验结果符合很好,当切态。使用适合高速变形条件的 Johnson-Cook材料模削速度和进给量一定时,锯齿化程度随刀具前角的增型、断裂准则和 ABAQUS有限元软件,模拟并测量高速0.80LIU Zhan Qiang, WAN Yi, AI Xing. Cutting forces in High Speed Milling[J]. China Mechanical Engineering, 2003, 14(9): 734-737( In Chix0.60[2]Kishawy H A. An experimental evaluation of cutting temperature duringhigh speed machining of hardened D2 tool steel[ J]. Machining Science0.40and Technology, 2002, 6(1): 67-79[3]刘战强,艾兴.高速切削刀具磨损表面形态研究[门摩擦学学〓0.20报,2002,22(6):468-471RLIU Zhan Qiang, Al Xing. Wear characteristics of cutting tools in high尽0speed machining[J]. Tribology, 2002, 22(6): 468-471( In Chinese)0.000.050.100.150.20[4]赵文祥,龙震海,王西彬,等.高速切削超高强度钢时次表面层时间 Time x103/s的组织特性研究[J.航空材料学报,200,25(4):2025图7锯齿状切屑形成时的切削力波动(y0=0)ZHAO Wen Xiang, LONG ZhenHai, WANG XiBin, et al. Study on theFig7 Effect of tool angle on the cutting force(yo =00)metallurgical structure characters of sub-surface layer of ultra-high strength0.80alloy steel in high speed milling condition[J]. Joumal of Aeronautical MEterials, 2005, 25(4): 20-25( In Chinese)[5] Sung H R, Soo-Ik 0. Prediction of serrated chip formation in metal cutting0.60process with new flow stress model for AISI 1045 steellJ]. Joumal of Ma-terials Processing Technology, 2006,171: 417-4220.40[6】赵军,孟辉,王素玉,等.高速切削锯齿状切屑的有限元模拟[.工具技术,2005,39(1):29-310.20ZHAO Jun, MENG Hui, WANG SuYu, et al. Finite element simulatinganalysis of serrated chip formation in high speed cutting[J]. Tool Engi-0ing,2005,39(1):29-31( In Chinese)早0.000050.100.150.20时间 Time x103/s[7]Christian H, Svendsen B. Simmlation of chip formation during high-speed图8锯齿状切屑形成时的切削力波动(=10)cutting[ J]. Joumal of Materials Processing Technology, 2007, 186: 66Fig8 Effect of tool angle on the cutting force(%o = 100)[8] Klocke F, Raedt H W, Hoppe S. 2D-deform simulation of the orthogonal切削AISI4340钢过程中不同刀具前角条件下的切屑high speed cutting process[]. Machining Science and Technology, 2001形态和切削力,讨论刀具前角和切屑形态对切削力的5(3):323-340.影响。研究结果表明,模拟结果与试验结果能很好地9)]shkH,AbeE, Sahm a. Material aspects of chip formation in HSC相符。因此,本文使用的有限元模拟方法可以准确预machining[ J]. Amals of the CIRP- Manufacturing Technology, 2001, 50(1)测高速切削淬硬钢时切屑形成过程。参考文献( References)[1]刘战强,万熠,艾兴.高速铣削中切削力的研究[J.中国机械工程,2003,14(9):734-737.

【实例简介】采用STC单片机STC12C5A60S2为控制芯片，ATT7022B为采样计量芯片，进行设计的多功能电表，压缩包里包含了全部单片机源程序C51代码

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

有注释，有助于初学者理解。注意，64位的可执行文件在32位机上执行不了

这是一个利用matlab产生正弦条纹的代码程序

ode45 matlab使用方法ode45 matlab

【实例简介】搞wifi开发的人都知道，不多说了哈。

代码中描述了用星座图扩展法（Active Constellation Extension，ACE）降低OFDM时域信号的PAPR，ACE的具体算法是凸集映射（Projection Onto Convex Sets，POCS）.编程语言:MATLAB