Wyniki wyszukiwania dla: j-matrix method

• Application of the J-matrix method to multichannel scattering

  Publikacja

  • P. Syty
  • Ł. Redynk
  • J. E. Sienkiewicz

  - The European Physical Journal-Special Topics - Rok 2013

  In this contribution we describe the multichannel extension to the nonrelativistic J-matrix method, and present differential cross sections for scattering of slow electrons from Argon atoms. Nonrelativistic phase shifts, then the S-matrix and the cross sections have been calculated using newly developed Fortran code, JMATRIX-MULTI.We applied the model Hartree-Fock potential as the scattering potential, which was truncated in the...

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• JMATRIX - a package for relativistic J-matrix calculations in elastic scattering of electrons from model potentials

  Publikacja

  • P. Syty
  • J. E. Sienkiewicz

  - TASK Quarterly - Rok 2017

  We present a software package JMATRIX, consisting of two computer codes written in FORTRAN 95 and parallelized with OpenMP, implementing the so-called J-matrix method, applied to elastic scattering of electrons on the radial potential, vanishing faster than Coulomb one. In the J-matrix method, physical scattering problem is replaced by using well-defined model, which is solved analytically. Presented software implements both non-relativistic...

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• OpenGL accelerated method of the material matrix generation for FDTD simulations

  Publikacja

  • S. Orłowski
  • T. Stefański

  - Rok 2014

  This paper presents the accelerated technique of the material matrix generation from CAD models utilized by the finite-difference time-domain (FDTD) simulators. To achieve high performance of these computations, the parallel-processing power of a graphics processing unit was employed with the use of the OpenGL library. The method was integrated with the developed FDTD solver, providing approximately five-fold speedup of the material...

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• General quasilinearization method for systems of differential equations with a singular matrix

  Publikacja

  • T. Jankowski

  - MATHEMATICAL NOTES - Rok 2006

  Stosując metodę kwazilinearyzacji badano problem rozwiązań przybliżonych dla układów równań różniczkowych z macierzą osobliwą. Pokazano zbieżność kwadratową odpowiednich ciągów monotonicznych.

• Efficient Fabry-Perot Open Resonator Analysis by the use of a Scattering Matrix Method

  Publikacja

  • M. Warecka
  • S. Dziedziewicz
  • P. Kowalczyk
  • R. Lech
  • P. Czekala
  • B. Salski
  • P. Kopyt

  - Rok 2022

  In this paper a comparative study of the computational efficiency of two modeling methods applied to the analysis of the plano- and double-concave Fabry-Perot open resonators is presented. In both numerical approaches, a scattering matrix method was applied, which allows splitting the analysis of the resonator into several sections, including the one with a spherical mirror, which requires the largest computing resources. Two modeling...

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• Matrix-based robust joint fingerprinting and decryption method for multicast distribution of multimedia

  Publikacja

  • B. Czaplewski
  • R. Rykaczewski

  - SIGNAL PROCESSING - Rok 2015

  This paper addresses the problem of unauthorized redistribution of multimedia content by malicious users (pirates). The solution proposed here is a new joint fingerprinting and decryption method which meets the requirements for both imperceptibility and robustness of fingerprints and scalability in terms of design and distribution of fingerprinted multimedia content. The proposed method uses a simple block cipher based on matrix...

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• Paraffin-Embedded Tissue as a Novel Matrix in Metabolomics Study: Optimization of Metabolite Extraction Method

  Publikacja

  • M. Buszewska-Forajta
  • M. Patejko
  • S. Macioszek
  • D. Sigorski
  • E. Iżycka-Świeszewska
  • M. Markuszewski

  - CHROMATOGRAPHIA - Rok 2019

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• Accelerated Monte Carlo method for computation of photon migration by matrix description of photon direction

  Publikacja

  • J. Pluciński

  - OPTICA APPLICATA - Rok 2005

  Przedstawiono metodę obliczeń dyfuzji fotonów w materiałach silnie rozpraszających, będącą modyfikacją metody Monte Carlo. Modyfikacja ta polega na zastąpieniu wektorowego opisu kierunku propagacji fotonów poprzez opis macierzowy, co pozwala na około 5% redukcję czasu obliczeń na komputerach z jednopotokowym przetwarzaniem zmiennopozycyjnym lub większą w wypadku wielopotokowego przetwarzania.

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• Non-Linear Analysis of Structures Utilizing Load-Discretization of Stiffness Matrix Method with Coordinate Update

  Publikacja

  • N. Saeed
  • A. Manguri
  • M. Szczepański
  • R. Jankowski

  - Applied Sciences-Basel - Rok 2022

  This paper proposes a stiffness method based structural analysis algorithm for geometrically non-linear structures. In this study, the applied load on the joints has been discretized to a sequence of a few loadings applied. Each loading step produces incremental external nodal displacements, which are added to the corresponding coordinates to get a new geometrical shape of the structure. This process is iteratively repeated until...

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• Silica-Polyethylene Glycol Matrix Synthesis by Sol-Gel Method and Evaluation for Diclofenac Diethyloammonium Release

  Publikacja

  • M. Prokopowicz

  - DRUG DELIVERY - Rok 2007

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