研究生学位论文(含研究报告)撰写范例(英文)19700字 电 子 科 技 大 学UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA硕士学位论文MASTER THESIS(电子科技大学图标)论文题目学科专业学 号作者姓名指导教师分类号 密级UDC注1学 位 论 文(题名和副题名)(作者姓名)指导教师(姓名、职称、单位名称)申请学位级别 学科专业提交论文日期 论文答辩日期 年 月 日 学位授予单位和日期 电子科技大学答辩委员会主席评阅人注1:注明《国际十进分类法UDC》的类号CALDER?N TECHNIQUE BASED INTEGRAL EQUATION METHODS IN COMPUTATIONALELECTROMAGNETICSA Master Thesis Submitted toUniversity of Electronic Science and Technology of ChinaMajor: Author: Advisor: School :独创性声明本人声明所呈交的学位论文是本人在导师指导下进行的研究工作及取得的研究成果。
据我所知,除了文中特别加以标注和致谢的地方外,论文中不包含其他人已经发表或撰写过的研究成果,也不包含为获得电子科技大学或其它教育机构的学位或证书而使用过的材料与我一同工作的同志对本研究所做的任何贡献均已在论文中作了明确的说明并表示谢意作者签名: 日期: 年 月 日论文使用授权本学位论文作者完全了解电子科技大学有关保留、使用学位论文的规定,有权保留并向国家有关部门或机构送交论文的复印件和磁盘,允许论文被查阅和借阅本人授权电子科技大学可以将学位论文的全部或部分内容编入有关数据库进行检索,可以采用影印、缩印或扫描等复制手段保存、汇编学位论文保密的学位论文在解密后应遵守此规定)作者签名: 导师签名:日期: 年 月 日- 4 -摘要摘 要本文基于电磁理论中的Calder?n关系与Calder?n恒等式所揭示的不同积分算子之间的关系,系统地研究了Calder?n预条件技术及其在计算电磁学积分方程方法中的应用研究内容全面覆盖了求解理想导电体目标和均匀或分层均匀介质目标电磁散射与辐射问题的积分方程中的Calder?n预条件技术在导体积分方程方面,研究了电场积分方程在中频,低频,以及高频区的Calder?n预处理方法。
在介质积分方程方面,则研究了PMCHWT积分方程的Calder?n预处理方法,和N-Müller积分方程的Calder?n技术本文对金属问题中的第二类Fredholm积分方程和介质问题中的第二类Fredholm积分方的精度改善进行了深入详尽的研究……关键词:电磁散射,面积分方程方法,Calder?n预条件方法,数值计算精度,第二类Fredholm积分方程IAbstractABSTRACTRevealed by the Calder?n relation and the Calder?n identities in electromagnetic theory, the properties and relation of different integral operators in the computational electromagnetics (CEM) are utilized to construct the Calder?n preconditioning techniques, which are applied in the integral-equation-based methods in this thesis. A thorough and systematic research has been accomplished to cover the Calder?n preconditioning techniques for the perfect electric conductor (PEC) and the dielectric cases. For the PEC case, the Calder?n preconditioning for the electric-field integral equation (EFIE) at mid, low, and high frequencies are constructed and studied. For the dielectric cases, the Calder?n preconditioningintegral for equation the are Poggio-Miller-Chang-Harrington-Wu-Tsai (PMCHWT)investigated, and the Calder?n technique for the N-Müller integral equation is developed. Moreover, the accuracy improving technique for the second-kind Fredholm integral equation for both PEC and dielectric cases is also studied in this thesis.…Keywords: Electromagnetic scattering and radiation, surface-integral-equation-basedMethods, Calder?n preconditioning methods, numerical accuracy, Fred-holm integral equations of the second kindIIContentsContentsChapter 1 Introduction .................................................................................................. 11.1 Research Background and Significance .............................................................. 11.2 State of Arts ......................................................................................................... 11.3 Contents and Innovations of the Thesis ............................................................... 21.4 Outline of the Thesis ........................................................................................... 2Chapter 2 Theoretical Basics ......................................................................................... 32.1 Integral Equations in Electromagnetics ............................................................... 32.2 270 MHz Plan Wave Excitation .......................................................................... 32.3 The Solution of Integral Equations in Electromagnetics ..................................... 42.3.1 General Principle of the Method of Moments ............................................ 42.3.2 Geometrical Modeling and Discretization of Object .................................. 42.3.2.1 Planar Triangular Model .................................................................. 42.3.2.2 Curvilinear Triangular Model .......................................................... 42.3.3 The Choice of Basis Functions ............................................................................ 52.3.3.1 Planar RWG Basis Functions ................................................................... 52.3.3.2 Curvilinear RWG Basis Functions .......................................................... 62.3.4 The Solution of Matrix Equations ....................................................................... 62.3.4.1 Direct Algorithms ........................................................................................ 62.3.4.2 Iterative Algorithms .................................................................................... 62.4 Conclusion ........................................................................................................... 6Chapter 3 Calder?n Preconditioner at Mid Frequencies ............................................ 73.1 Introduction ....................................................。