Wyniki wyszukiwania dla: RIEMANN SOLVER

• Towards an efficient multi-stage Riemann solver for nuclear physics simulations

  Publikacja

  • S. Cygert
  • J. Porter-Sobieraj
  • D. Kikoła
  • J. Sikorski
  • M. Słodkowski

  - Rok 2013

  Relativistic numerical hydrodynamics is an important tool in high energy nuclear science. However, such simulations are extremely demanding in terms of computing power. This paper focuses on improving the speed of solving the Riemann problem with the MUSTA-FORCE algorithm by employing the CUDA parallel programming model. We also propose a new approach to 3D finite difference algorithms, which employ a GPU that uses surface memory....

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• Formulation of Time-Fractional Electrodynamics Based on Riemann-Silberstein Vector

  Publikacja

  • T. Stefański
  • J. Gulgowski

  - ENTROPY - Rok 2021

  In this paper, the formulation of time-fractional (TF) electrodynamics is derived based on the Riemann-Silberstein (RS) vector. With the use of this vector and fractional-order derivatives, one can write TF Maxwell’s equations in a compact form, which allows for modelling of energy dissipation and dynamics of electromagnetic systems with memory. Therefore, we formulate TF Maxwell’s equations using the RS vector and analyse their...

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• Fractional equations of Volterra type involving a Riemann Liouville derivative

  Publikacja

  • T. Jankowski

  - APPLIED MATHEMATICS LETTERS - Rok 2013

  In this paper, we discuss the existence of solutions of fractional equations of Volterra type with the Riemann Liouville derivative. Existence results are obtained by using a Banach fixed point theorem with weighted norms and by a monotone iterative method too. An example illustrates the results.

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• Fractional Problems with Right-Handed Riemann-Liouville Fractional Derivatives

  Publikacja

  • T. Jankowski

  - TASK Quarterly - Rok 2016

  In this paper, we investigate the existence of solutions for advanced fractional differential equations containing the right-handed Riemann-Liouville fractional derivative both with nonlinear boundary conditions and also with initial conditions given at the end point T of interval [0,T ]. We use both the method of successive approximations, the Banach fixed point theorem and the monotone iterative technique, as well. Linear problems...

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• Initial value problems for neutral fractional differential equations involving a Riemann-Liouville derivative

  Publikacja

  • T. Jankowski

  - APPLIED MATHEMATICS AND COMPUTATION - Rok 2013

  Badano równania neutralne typu ułamkowego z odchylonym argumentem. Podano warunki dostateczne na istnienie jednego rozwiązania.

• Comments on various extensions of the Riemann–Liouville fractional derivatives : About the Leibniz and chain rule properties

  Publikacja

  • A. Szafrańska
  • J. Cresson

  - Communications in Nonlinear Science and Numerical Simulation - Rok 2020

  Starting from the Riemann–Liouville derivative, many authors have built their own notion of fractional derivative in order to avoid some classical difficulties like a non zero derivative for a constant function or a rather complicated analogue of the Leibniz relation. Discussing in full generality the existence of such operator over continuous functions, we derive some obstruction Lemma which can be used to prove the triviality...

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• Automatic Detection of Cloud Cover over the Baltic Sea

  Publikacja

  • A. Krężel
  • M. Paszkuta

  - JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY - Rok 2011

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• Deep eutectic solvent (DES) with silver nanoparticles (Ag-NPs) based assay for analysis of lead (II) in edible oils

  Publikacja

  • H. Haq
  • R. Bibi
  • M. Balal
  • F. Safi
  • S. Ullah
  • R. Castro-Muñoz
  • G. Boczkaj

  - FOOD CHEMISTRY - Rok 2022

  This paper presents an application of silver nanoparticles impregnated by Deep Eutectic Solvents (DES) as ultrasonication aided microextraction system for lead (II) determination in edible oils. The paper presents a systematic optimization of method parameters and examples of its application for analysis of real samples. Maximum recovery for lead (II) extraction was obtained for choline chloride and phenol with a 1:2 molar ratio....

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• Application of 3D flow solver in education of students

  Publikacja

  • K. Kosowski

  - TASK Quarterly - Rok 2002

  Przedstawiono zastosowanie metod numerycznej mechaniki płynów w kształceniu studentów uczelni technicznej. Omówiono zastosowanie metod CFD jako narzędzia pomocnego w zrozumieniu zagadnień termodynamiczno-przepływowych stopni turbinowych, jak i w rozwiązywaniu zadań projektowych.

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• SOLAR ENERGY MATERIALS AND SOLAR CELLS

  Czasopisma

  ISSN: 0927-0248 , eISSN: 1879-3398