Inverse Electromagnetic Scattering by a Dielectric Sphere Partially Buried in a Ground Plane Using Neural Networks PDF Download

Author: Chye Hwa Loo
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 288

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Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 324

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"Education, arts and social sciences, natural and technical sciences in the United States and Canada".

Author: Henry Shing-Horng Chang
Publisher:
ISBN:
Category :
Languages : en
Pages : 266

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Author: David Allen Hill
Publisher:
ISBN:
Category : Remote sensing
Languages : en
Pages : 150

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Problems related to the detection of targets in the presence of clutter and ground are investigated. The two basic problems are the change in the target response due to the presence of the ground and the recognition of the target response when contaminated with clutter return. The transient fields of short dipoles in the presence of a dielectric half-space are examined and exact closed-form solutions are obtained for some particular source and observation points. The solution for the case of the source and observation points coincident is used to determine the interaction between a dipole source and the interface and the resultant dipole impedance change. The same solutions are used to compute the change in the dipole modes of scatterers due to the presence of a half-space, particularly the shift in the s-plane poles of the target. Results are presented for both dielectric and perfectly conducting half-spaces. (Author).

Author: K. K. Mei
Publisher:
ISBN:
Category :
Languages : en
Pages : 20

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The objective of this research is to study the feasibility of computing electromagnetic wave scattering by objects which are buried or partially buried in a lossy ground. The datas obtained through computer solutions of the related Maxwell's Equations can be applied to detection of plastic land mines, tunnels and natural resources. The method used in this investigation is based on the Unimoment method, a unique hybrid of analytical and numerical methods. The extension of the method to include lossy ground half-space was made possible by the development of special eigenfunctions which include the continuity of the air-ground interface. Results were obtained for scattering by buried body of revolution, buried body of revolution with arbitrary orientation and two-body scattering.

Author: Mohammad Ali Kolbehdari
Publisher:
ISBN:
Category :
Languages : en
Pages : 128

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Author: Terry Michael Kvam
Publisher:
ISBN:
Category :
Languages : en
Pages : 400

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Author: Lahma Bliss Flack
Publisher:
ISBN:
Category :
Languages : en
Pages : 128

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Author: Soon K. Cho
Publisher: Springer Science & Business Media
ISBN: 1461390648
Category : Technology & Engineering
Languages : en
Pages : 405

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0.1 Introduction The present volume is about the physics of electromagnetic scattering, not mathematics, and is intended as a reference book for engineering and physics students as well as researchers in electromagnetic scattering. Although the subject is on electromagnetic scattering, acoustic or scalar scattering will be discussed occasionally when it is deemed helpful and advantageous. In the current decade we are witnessing an emergence of inverse scattering theory. Before we embark on this exciting journey, perhaps this is an appropriate time to summarize and assess in one volume some of the important re sults of electromagnetic scattering which have been found in recent decades. Since the end of WW II two significant physical phenomena in electromag netic scattering, optimal polarization and exterior resonant frequencies, have been discovered and a powerful mathematical technique, called the integral equation method, has been incorporated. These physical quantities, which characterize the scattered field for a given scatterer, are not directly observ able but can only be extracted by mathematical means from the measured scattering data. They are given special attention.

Author: Claude Bourrely
Publisher: World Scientific
ISBN: 981461887X
Category :
Languages : en
Pages : 374

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Contents:Light Scattering Problems in Astrophysics (J M Perrin)Surface Integral Operators and their Use in Acoustics and Electromagnetics (A Berthon)Acoustic Diffraction by Slender Bodies of Arbitrary Shape (M Tran-Van-Nhieu)High and Low Energy Approximations for the Electromagnetic Scattering by Irregular Objects (B Torresani)Electromagnetic Scattering and Mutual Interactions Between Closely Spaced Spheroids (J Dalmas & R Deleuil)Acoustical Imaging of 2D Fluid Targets Buried in a Half Space: A Diffraction Tomography Approach Using Line-Sources Insonification (B Duchene et al)Contribution of Radar Polarimetry in Radar Target Discrimination. The “Poincaré Planisphere”: a New Representation Method (E Pottier)Electromagnetic and Acoustic Waves in Random Media: from Propagation to Anderson Localization (B Souillard)Weak Disorder: Homogeneisation Method and Propagation (C Bardos)Coherent Propagation of Surface Acoustic Waves in Quasi-Periodic and Random Arrays of Grooves (D Sornette et al)On Asymptotic Behaviour of Waves States in Random Media (F Bentosela & R Rodriguez)A Study of Acoustic Transmission of Transient Signal in a Inhomogeneous Medium with the Help of a Wavelet Transform. Application to an Air-Water Plane Interface (G Saracco & Ph Tchamitchian)Three-Dimensional Impedance Scattering Theory (P Sabatier)Survey of Optimization Algorithms Applied to Inverse Problems (A Roger)A Linearized Inverse Problem: Acoustic Impedance Tomography of Biological Media (J P Lefebvre)and others Readership: Electrical engineers and mathematicians.