Wyniki wyszukiwania dla: NONLINEAR ADVECTION EQUATIONS

• Identification of nonlinear viscoelastic properties of the ''Panama'' fabric

  Publikacja

  • W. Komar
  • P. Kłosowski
  • K. Woźnica

  - MACHINE DYNAMICS PROBLEMS - Rok 2006

  Tkanina techniczna Panama wytwarzana przez firmę Sattler (Niemcy)wykazuje cechy nieliniowe w tym właściwości lepkosprężyste w czasie testów długoterminowych. Na podstawie jednoosiowych testów płynięcia i regeneracji przeprowadzonych dla pięciu poziomów obciążenia przeprowadzono identyfikacje nieliniowych lepkosprężystych właściwości tkaniny. Do opisu zależności konstytutywnych użyto całkowego modelu Schapery'ego. Zastosowano funkcję...

• Linear and nonlinear Stark effect in a triangular molecule

  Publikacja

  • B. Bułka
  • T. Kostyrko
  • J. Łuczak

  - PHYSICAL REVIEW B - Rok 2011

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• <title>Measurements of nonlinear optical fibers</title>

  Publikacja

  • R. Romaniuk
  • R. S. Romaniuk

  - Rok 2003

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• A nonlinear approach to modelling gas bubble deformation.

  Publikacja

  • J. Cieśliński
  • R. Mosdorf

  - Rok 2005

  Przedstawiono model wyjaśniający wpływ deformacji pęcherzyka na występowanie zjawiska chaosu podczas generowania pęcherzyków gazowych z pojedynczej dyszy zanurzonej w cieczy.

• Linear and nonlinear impedance in iron oxide glasses containing alkaline ions and alkali free

  Publikacja

  • N. A. Wójcik

  - Rok 2012

  The linear and nonlinear impedance spectra of oxide glasses were measured in the frequency range of 1 mHz to 1 MHz and in the temperature range of 153K to 483K. Two groups of iron oxide glass samples were prepared, the first one containing alkaline ions and the second one without alkali. In the first group, compositions of glasses were as follows: (in %mol) 50% SiO2 , 25% PbO, 15% Fe2O3 and 15% one of alkaline oxides: Na2O, K2O,...

• Inverse Nonlinear Eigenvalue Problem Framework for the Synthesis of Coupled-Resonator Filters With Nonresonant Nodes and Arbitrary Frequency-Variant Reactive Couplings

  Publikacja

  • M. Mul
  • A. Lamęcki
  • R. Gómez-García
  • M. Mrozowski

  - IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES - Rok 2021

  A novel, general circuit-level description of coupledresonator microwave filters is introduced in this article. Unlike well-established coupling-matrix models based on frequency-invariant couplings or linear frequency-variant couplings (LFVCs), a model with arbitrary reactive frequencyvariant coupling (AFVC) networks is proposed. The engineered formulation is more general than prior-art ones—with the only restriction that the coupling...

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• Nonlinear FEM 2D failure onset prediction of composite shells based on 6-parameter shell theory

  Publikacja

  • J. Chróścielewski
  • A. Sabik
  • B. Sobczyk
  • W. Witkowski

  - THIN-WALLED STRUCTURES - Rok 2016

  Within the framework of the nonlinear 6-parameter shell theory with the drilling rotation and asymmetric stress measures, the modifications of Tsai-Wu and Hashin laminate failure initiation criteria are proposed. These improvements enable to perform first ply failure estimations taking into account the non-symmetric stress measures. In order to check the validity of the proposed criteria, finite element analyses are performed with...

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• Monotone iterative method to second order differential equations with deviating arguments involving Stieltjes integral boundary conditions

  Publikacja

  • T. Jankowski
  • R. Jankowski

  - DYNAMIC SYSTEMS AND APPLICATIONS - Rok 2012

  We use a monotone iterative method for second order differential equations with deviating arguments and boundary conditions involving Stieltjes integrals. We establish sufficient conditions which guarantee that such problems have extremal solutions in the corresponding region bounded by lower and upper solutions. We also discuss the situation when problems have coupled quasi-solutions. We illustrate our results by three examples.

• Preconditioners with Low Memory Requirements for Higher-Order Finite-Element Method Applied to Solving Maxwell’s Equations on Multicore CPUs and GPUs

  Publikacja

  • A. Dziekoński
  • G. Fotyga
  • M. Mrozowski

  - IEEE Access - Rok 2018

  This paper discusses two fast implementations of the conjugate gradient iterative method using a hierarchical multilevel preconditioner to solve the complex-valued, sparse systems obtained using the higher order finite-element method applied to the solution of the time-harmonic Maxwell equations. In the first implementation, denoted PCG-V, a classical V-cycle is applied and the system of equations on the lowest level is solved...

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• Complex Variables and Elliptic Equations

  Czasopisma

  ISSN: 1747-6933 , eISSN: 1747-6941

• COMMUNICATIONS IN PARTIAL DIFFERENTIAL EQUATIONS

  Czasopisma

  ISSN: 0360-5302 , eISSN: 1532-4133

• Journal of Integral Equations and Applications

  Czasopisma

  ISSN: 0897-3962 , eISSN: 1938-2626

• Computational Methods for Differential Equations

  Czasopisma

  ISSN: 2345-3982 , eISSN: 2383-2533

• Journal of Partial Differential Equations

  Czasopisma

  ISSN: 2079-732X , eISSN: 1000-940X

• International Journal of Differential Equations

  Czasopisma

  ISSN: 1687-9643 , eISSN: 1687-9651

• Evolution Equations and Control Theory

  Czasopisma

  ISSN: 2163-2480

• Differential Equations and Dynamical Systems

  Czasopisma

  ISSN: 0971-3514 , eISSN: 0974-6870

• Journal of Elliptic and Parabolic Equations

  Czasopisma

  ISSN: 2296-9020 , eISSN: 2296-9039

• Dynamics of Partial Differential Equations

  Czasopisma

  ISSN: 1548-159X

• INTEGRAL EQUATIONS AND OPERATOR THEORY

  Czasopisma

  ISSN: 0378-620X , eISSN: 1420-8989

• Random Operators and Stochastic Equations

  Czasopisma

  ISSN: 0926-6364 , eISSN: 1569-397X

• JOURNAL OF DIFFERENCE EQUATIONS AND APPLICATIONS

  Czasopisma

  ISSN: 1023-6198 , eISSN: 1563-5120

• Partial Differential Equations and Applications

  Czasopisma

  ISSN: 2662-2963 , eISSN: 2662-2971

• Journal of Hyperbolic Differential Equations

  Czasopisma

  ISSN: 0219-8916 , eISSN: 1793-6993

• Positive solutions to second-order differential equations with dependence on the first-order derivative and nonlocal boundary conditions

  Publikacja

  • T. Jankowski

  - Boundary Value Problems - Rok 2013

  In this paper, we consider the existence of positive solutions for second-order differential equations with deviating arguments and nonlocal boundary conditions. By the fixed point theorem due to Avery and Peterson, we provide sufficient conditions under which such boundary value problems have at least three positive solutions. We discuss our problem both for delayed and advanced arguments α and also in the case when α(t)=t, t∈[0,1]....

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• Nonlinear impedance of vanadate glass-ceramics containing BaTiO3

  Dane Badawcze

  open access

  • N. Wójcik
  • R. Barczyński
  • J. Ryl

  The nonlinear impedance of vanadate glasses doped with BaTiO3 was measured. Samples of the composition of x[BaO,TiO2]–(80 − x)V2O5–20Bi2O3 where x = 5, 10 and 15 in mol% were prepared by a conventional melt quenching technique. The melting was performed in alumina crucibles at the temperature of 1273 K–1373 K. The melts were poured on a preheated (573...

• Nonlocal Vibration of Carbon/Boron-Nitride Nano-hetero-structure in Thermal and Magnetic Fields by means of Nonlinear Finite Element Method

  Publikacja

  • H. M. Sedighi
  • M. Malikan
  • A. Valipour
  • K. Kamil Żur

  - Journal of Machinery Manufacture and Reliability - Rok 2020

  Hybrid nanotubes composed of carbon and boron-nitride nanotubes have manifested as innovative building blocks to exploit the exceptional features of both structures simultaneously. On the other hand, by mixing with other types of materials, the fabrication of relatively large nanotubes would be feasible in the case of macroscale applications. In the current article, a nonlinear finite element formulation is employed to deal with...

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• A Model of Thermal Energy Storage According to the Convention of Bond Graphs (BG) and State Equations (SE)

  Publikacja

  • M. Cichy
  • J. Kropiwnicki
  • Z. Kneba

  - Polish Maritime Research - Rok 2015

  The main advantage of the use of the Bond Graphs method and State Equations for modeling energy systems with a complex structure (marine power plants, hybrid vehicles, etc.) is the ability to model the system components of different physical nature using identical theoretical basis. The paper presents a method of modeling thermal energy storage, which is in line with basic BG theory. Critical comments have been put forward concerning...

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• Effective Equations for the Optimum Seismic Gap Preventing Earthquake-Induced Pounding between Adjacent Buildings Founded on Different Soil Types

  Publikacja

  • M. Miari
  • R. Jankowski

  - Applied Sciences-Basel - Rok 2023

  The best approach to avoid collisions between adjacent structures during earthquakes is to provide sufficient spacing between them. However, the existing formulas for calculating the optimum seismic gap preventing pounding were found to provide inaccurate results upon the consideration of different soil types. The aim of this paper is to propose new equations for the evaluation of the sufficient in-between separation gap for buildings...

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• Probabilistic assessment of SMRFs with infill masonry walls incorporating nonlinear soil-structure interaction

  Publikacja

  • F. Kazemi
  • N. Asgarkhani
  • R. Jankowski

  - Bulletin of Earthquake Engineering - Rok 2023

  Infill Masonry Walls (IMWs) are used in the perimeter of a building to separate the inner and outer space. IMWs may affect the lateral behavior of buildings, while they are different from those partition walls that separate two inner spaces. This study focused on the seismic vulnerability assessment of Steel Moment-Resisting Frames (SMRFs) assuming different placement of IMWs incorporating nonlinear Soil-Structure Interaction (SSI)....

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• Application of discrete wavelet transform in seismic nonlinear analysis of soil–structure interaction problems

  Publikacja

  • R. Kamgar
  • R. Tavakoli
  • P. Rahgozar
  • R. Jankowski

  - EARTHQUAKE SPECTRA - Rok 2021

  Simulation of soil-structure interaction (SSI) effects is a time-consuming and costly process. However, ignoring the influence of SSI on structural response may lead to inaccurate results, especially in the case of seismic nonlinear analysis. In this paper, wavelet transform methodology has been utilized for investigation of the seismic response of soil-structure systems. For this purpose, different storey outrigger braced buildings...

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• An objective isogeometric mixed finite element formulation for nonlinear elastodynamic beams with incompatible warping strains

  Publikacja

  • M. Choi
  • S. Klinkel
  • S. Klarmann
  • R. Sauer

  - MULTIBODY SYSTEM DYNAMICS - Rok 2024

  We present a stable mixed isogeometric finite element formulation for geometrically and materially nonlinear beams in transient elastodynamics, where a Cosserat beam formulation with extensible directors is used. The extensible directors yield a linear configuration space incorporating constant in-plane cross-sectional strains. Higher-order (incompatible) strains are introduced to correct stiffness, whose additional degrees of...

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• Journal of Nonlinear Functional Analysis

  Czasopisma

  ISSN: 2052-532X

• Journal of Nonlinear Sciences and Applications

  Czasopisma

  ISSN: 2008-1898

• Nonlinear Analysis-Hybrid Systems

  Czasopisma

  ISSN: 1751-570X , eISSN: 1878-7460

• Advances in Nonlinear Variational Inequalities

  Czasopisma

  ISSN: 1092-910X

• Nonlinear Functional Analysis and Applications

  Czasopisma

  ISSN: 1229-1595

• Journal of Applied Nonlinear Dynamics

  Czasopisma

  ISSN: 2164-6457

• Communications on Applied Nonlinear Analysis

  Czasopisma

  ISSN: 1074-133X

• Nonlinear Dynamics and Systems Theory

  Czasopisma

  ISSN: 1562-8353

• Nonlinear Phenomena in Complex Systems

  Czasopisma

  ISSN: 1561-4085 , eISSN: 1817-2458

• Journal of Computational and Nonlinear Dynamics

  Czasopisma

  ISSN: 1555-1423 , eISSN: 1555-1415

• Nonlinear Analysis-Modelling and Control

  Czasopisma

  ISSN: 1392-5113

• Russian Journal of Nonlinear Dynamics

  Czasopisma

  ISSN: 2658-5324 , eISSN: 2658-5316

• Journal of Nonlinear Modeling and Analysis

  Czasopisma

  ISSN: 2562-2854 , eISSN: 2562-2862

• JOURNAL OF NONLINEAR MATHEMATICAL PHYSICS

  Czasopisma

  ISSN: 1402-9251 , eISSN: 1776-0852

• Applied Mathematics and Nonlinear Sciences

  Czasopisma

  eISSN: 2444-8656

• Journal of Nonlinear and Convex Analysis

  Czasopisma

  ISSN: 1345-4773 , eISSN: 1880-5221

• Journal of Nonlinear and Variational Analysis

  Czasopisma

  ISSN: 2560-6921 , eISSN: 2560-6778

• STUDIES IN NONLINEAR DYNAMICS AND ECONOMETRICS

  Czasopisma

  ISSN: 1081-1826 , eISSN: 1558-3708