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Applications Of The Conjugate Gradient Fft Method In Scattering And Radiation Including Simulations With Impedance Boundary Conditions
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723526992 Total Pages :292 pages Book Rating :4.5/5 (269 download)
Book Synopsis Applications of the Conjugate Gradient FFT Method in Scattering and Radiation Including Simulations with Impedance Boundary Conditions by : National Aeronautics and Space Administration (NASA)
Download or read book Applications of the Conjugate Gradient FFT Method in Scattering and Radiation Including Simulations with Impedance Boundary Conditions written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-23 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theoretical and computational aspects related to the application of the Conjugate Gradient FFT (CGFFT) method in computational electromagnetics are examined. The advantages of applying the CGFFT method to a class of large scale scattering and radiation problems are outlined. The main advantages of the method stem from its iterative nature which eliminates a need to form the system matrix (thus reducing the computer memory allocation requirements) and guarantees convergence to the true solution in a finite number of steps. Results are presented for various radiators and scatterers including thin cylindrical dipole antennas, thin conductive and resistive strips and plates, as well as dielectric cylinders. Solutions of integral equations derived on the basis of generalized impedance boundary conditions (GIBC) are also examined. The boundary conditions can be used to replace the profile of a material coating by an impedance sheet or insert, thus, eliminating the need to introduce unknown polarization currents within the volume of the layer. A general full wave analysis of 2-D and 3-D rectangular grooves and cavities is presented which will also serve as a reference for future work. Barkeshli, Kasra and Volakis, John L. Unspecified Center NASA-CR-188214, NAS 1.26:188214, UM-025921-21-T NAG2-541...
Book Synopsis APPLICATIONS OF THE CONJUGATE GRADIENT FFT METHOD IN SCATTERING AND RADIATION INCLUDING SIMULATIONS WITH IMPEDANCE BOUNDARY CONDITIONS. by : KASRA BARKESHLI
Download or read book APPLICATIONS OF THE CONJUGATE GRADIENT FFT METHOD IN SCATTERING AND RADIATION INCLUDING SIMULATIONS WITH IMPEDANCE BOUNDARY CONDITIONS. written by KASRA BARKESHLI and published by . This book was released on 1991 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: finite number of steps. Moreover, since the CGFFT algorithm is highly vectorizable, it can be efficiently implemented on supercomputers and multiprocessor machines.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis a finite element-boundary intefral method for electomagnetic scattering by : jeffery david collins
Download or read book a finite element-boundary intefral method for electomagnetic scattering written by jeffery david collins and published by . This book was released on 1992 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1994 with total page 1064 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applications of the Conjugate Gradient FFT Method to a Class of Large Radiating and Scattering Problems by : Kasra Barkeshli
Download or read book Applications of the Conjugate Gradient FFT Method to a Class of Large Radiating and Scattering Problems written by Kasra Barkeshli and published by . This book was released on 1988 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1991 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Finite Element Conjugate Gradient FFT Method for Scattering by : National Aeronautics and Space Adm Nasa
Download or read book A Finite Element Conjugate Gradient FFT Method for Scattering written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-10-22 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extension of a two dimensional formulation is presented for a three dimensional body of revolution. With the introduction of a Fourier expansion of the vector electric and magnetic fields, a coupled two dimensional system is generated and solved via the finite element method. An exact boundary condition is employed to terminate the mesh and the fast fourier transformation (FFT) is used to evaluate the boundary integrals for low O(n) memory demand when an iterative solution algorithm is used. By virtue of the finite element method, the algorithm is applicable to structures of arbitrary material composition. Several improvements to the two dimensional algorithm are also described. These include: (1) modifications for terminating the mesh at circular boundaries without distorting the convolutionality of the boundary integrals; (2) the development of nonproprietary mesh generation routines for two dimensional applications; (3) the development of preprocessors for interfacing SDRC IDEAS with the main algorithm; and (4) the development of post-processing algorithms based on the public domain package GRAFIC to generate two and three dimensional gray level and color field maps. Collins, Jeffery D. and Zapp, John and Hsa, Chang-Yu and Volakis, John L. Unspecified Center ...
Book Synopsis A Finite Element-- by : Jeffrey D. Collins
Download or read book A Finite Element-- written by Jeffrey D. Collins and published by . This book was released on 1992 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Journal of the Optical Society of America by :
Download or read book Journal of the Optical Society of America written by and published by . This book was released on 1994 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1991 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fast Memory-saving Hybrid Algorithms for Electromagnetic Scattering and Radiation by : Sunil Bindiganavale
Download or read book Fast Memory-saving Hybrid Algorithms for Electromagnetic Scattering and Radiation written by Sunil Bindiganavale and published by . This book was released on 1997 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Conjugate Gradient Method to Electromagnetics and Signal Analysis by : Tapan K. Sarkar
Download or read book Application of Conjugate Gradient Method to Electromagnetics and Signal Analysis written by Tapan K. Sarkar and published by Elsevier Science & Technology. This book was released on 1991 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal Dosimetry and Treatment Planning by : Michel Gautherie
Download or read book Thermal Dosimetry and Treatment Planning written by Michel Gautherie and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: When in the future improved and more flexible heating equipment becomes available, and when hyperthermia is applied more routinely, computerized simulations of treatments will become commonplace, as they are in radia tion therapy. For hyperthermia, however, such simulations will be used not only for the traditional role of planning patient treatment, but also for three other applications not needed in radiation therapy - the comparative evalu ation of equipment, feedback control during treatment, and the post-treat ment evaluation of therapy. The present simulations of hyperthermia are crude and simple when compared with what is required for these future ap plications, a fact which indicates the nedd for considerable research and de velopment in this area. Indeed, this research is proceeding rapidly within the hyperthermia community, whre three-dimensional power deposition and temperature calculations have just become available for realistic patief\t anatomies. Of equal significance are the even more rapid development in diagnostic imaging for the determination and display of patient anatomy and blood flow rates - information required for the planning of realistic hyperthermia treatment. These simulations will be very valuable tools which can be used to great ad vantage when combined with data obtained from treatments of patients.
Book Synopsis A Conjugate Gradient FFT Method for the Computation of the Scattering by Thin Planar Material Plates by :
Download or read book A Conjugate Gradient FFT Method for the Computation of the Scattering by Thin Planar Material Plates written by and published by . This book was released on 1988 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:
