Search results for: APPLICATION OF NONLINEAR ACOUSTICS

• Wild oscillations in a nonlinear neuron model with resets: (I) Bursting, spike-adding and chaos

  Publication

  • J. Rubin
  • J. Signerska-Rynkowska
  • J. Touboul
  • A. Vidal

  - DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES B - Year 2017

  In a series of two papers, we investigate the mechanisms by which complex oscillations are generated in a class of nonlinear dynamical systems with resets modeling the voltage and adaptation of neurons. This first paper presents mathematical analysis showing that the system can support bursts of any period as a function of model parameters, and that these are organized in a period-incrementing structure. In continuous dynamical...

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• Unusual dynamics and nonlinear thermal self-focusing of initially focused magnetoacoustic beams in a plasma

  Publication

  • A. Perelomova

  - CONTRIBUTIONS TO PLASMA PHYSICS - Year 2024

  Unusual thermal self-focusing of two-dimensional beams in plasma which axis is parallel to the equilibrium straight magnetic field is considered. The equi- librium parameters of plasma determine scenario of a beam divergence (usual or unusual) which is stronger as compared with a flow without magnetic field. Nonlinear thermal self-action of a magnetosonic beam behaves differently in the ordinary and unusual cases. Damping of wave...

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• Application of Mathematics in Technology 2 [2022/23]

  e-Learning Courses

  • J. Horiszny

  {mlang en}Numerical methods in electrical engineering.{mlang} {mlang pl}Metody numeryczne w elektrotechnice{mlang}

• Composite materials - fabrication, properties and prospects of application

  e-Learning Courses

  • B. Bochentyn

• Application of Mathematics in Technology 2 [2020/21]

  e-Learning Courses

  • J. Horiszny

  Kurs dla studentów sem. 4 na kierunku Energy Technologies studiów stacjonarnych I stopnia w języku angielskim. Metody numeryczne. Zastosowania w elektrotechnice. Wykład+ćwiczenia.

• Application of Mathematics in Technology 2 [2021/22]

  e-Learning Courses

  • J. Horiszny

  {mlang en}Numerical methods in electrical engineering.{mlang} {mlang pl}Metody numeryczne w elektrotechnice{mlang}

• Application of Mathematics in Technology 2 [2023/24]

  e-Learning Courses

  • J. Horiszny

• Stress-driven nonlocal elasticity for nonlinear vibration characteristics of carbon/boron-nitride hetero-nanotube subject to magneto-thermal environment

  Publication

  • H. M. Sedighi
  • M. Malikan

  - PHYSICA SCRIPTA - Year 2020

  Stress-driven nonlocal theory of elasticity, in its differential form, is applied to investigate the nonlinear vibrational characteristics of a hetero-nanotube in magneto-thermal environment with the help of finite element method. In order to more precisely deal with the dynamic behavior of size-dependent nanotubes, a two-node beam element with six degrees-of freedom including the nodal values of the deflection, slope and curvature...

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• Mobile application technology in levelling

  Publication

  • M. Bednarczyk
  • A. Janowski

  - Acta Geodynamica et Geomaterialia - Year 2014

  The topic of this article is the use of mobile application technology in geodetic measurements with an emphasis on levelling. Reference points were registered as data from levelling benchmarks, performed with a traditional dumpy level. The created application allowed the recording of measurements on location, sending them to a remote server for processing and preparing a report to be saved in a database. The project was to decrease...

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• Employment of a Nonlinear Adaptive Control System for Improved Control of Dissolved Oxygen in Sequencing Batch Reactor

  Publication

  • M. Banach
  • M. Kolankowski
  • R. Piotrowski
  • T. Ujazdowski

  - Year 2023

  A proper control in a complex system, such as Wastewater Treatment Plant (WWTP) with each year is becoming increasingly important. High quality control can minimize an environmental impact as well as reduce operational costs of the WWTP. One of the core issues is providing adequate dissolved oxygen (DO) concetration for microorganisms used in a treatment process. An aeration process of the wastewater realised by an system consisting...

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• NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS

  Journals

  ISSN: 1468-1218

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

  Publication

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

  - MACHINE DYNAMICS PROBLEMS - Year 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...

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

  Publication

  • R. Romaniuk
  • R. S. Romaniuk

  - Year 2003

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• Linear and nonlinear Stark effect in a triangular molecule

  Publication

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

  - PHYSICAL REVIEW B - Year 2011

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• On delay differential equations with nonlinear boundary conditions

  Publication

  • T. Jankowski

  - Year 2005

  Stosując metodę iteracji monotonicznych podano warunki dostateczne na istnienie kwazirozwiązań lub ekstremalnych rozwiązań rozpatrywanego zagadnienia. Problem jednoznaczności rozwiązania był również przedmiotem badań. Zajmowano się również nierównościami różniczkowymi z opóżnionymi argumentami.

• A nonlinear approach to modelling gas bubble deformation.

  Publication

  • J. Cieśliński
  • R. Mosdorf

  - Year 2005

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

• Advanced differential equations with nonlinear boundary conditions.

  Publication

  • T. Jankowski

  - Year 2005

  Badano problemy istnienia rozwiązań dla równań różniczkowych z nielinowymi warunkami brzegowymi. Podano też warunki dostateczne na istnienie rozwiązań ekstremalnych. Przedmiotem badań były również nierówności różniczkowe z wyprzedzonym argumentem.

• Ordinar differential equations with nonlinear boundary conditions

  Publication

  • T. Jankowski

  - Georgian Mathematical Journal - Year 2002

  Praca dotyczy zwyczajnych równań różniczkowych z nieliniowymi warunkami brzegowymi. Sformułowano warunki dostateczne na istnienie rozwiązania (jedynego lub ekstremalnych) zakładając pewną regularność na prawe strony równania i warunek brzegowy. Warunki brzegowe typu okresowego lub antyokresowego są szczególnymi przypadkami ogólnego warunku dyskutowanego w tej pracy.

• International Journal of Microgravity Science and Application

  Journals

  ISSN: 0915-3616 , eISSN: 2188-9783

• International Journal of Database Theory and Application

  Journals

  ISSN: 2005-4270

• Annual Review of Statistics and Its Application

  Journals

  ISSN: 2326-831X

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

  Publication

  • N. A. Wójcik

  - Year 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

  Publication

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

  - IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES - Year 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

  Publication

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

  - THIN-WALLED STRUCTURES - Year 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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• Silicon carbide application issues

  Publication

  • A. Konczakowska
  • A. Szewczyk
  • R. Barlik
  • M. Nowak
  • J. Rąbkowski

  - Year 2007

  The main goals of Task 3 and Task 4 of the ordered project ''New technologies based on silicon carbide and their application in HF, high power and high temperature electronics'' are presented

• Nonlinear impedance of vanadate glass-ceramics containing BaTiO3

  Open Research Data

  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...

• Application of Mathematics in Technology, ET, sem 3, 23/24, (PG_00049767)

  e-Learning Courses

  • K. Wrzask

  Application of Mathematics  MOODLE ENV localdevtestprod

• Application of Vector Sensors to Acoustic Surveillance of a Public Interior Space

  Publication

  • K. Łopatka
  • J. Kotus
  • A. Czyżewski

  - Archives of Acoustics - Year 2011

  Przedstawiono metodę precyzyjnej detekcji i lokalizacji źródeł dźwięku w pomieszczeniach. Wykorzystano wektorowe czujniki akustyczne, dostarczające sygnałów ciśnienia akustycznego i prędkości cząsteczek powietrza. Zaprezentowano metodę lokalizacji źródeł dźwięku na widowni wydarzenia publicznego. Przedstawiono demonstracyjny system zainstalowany w sali wykładowej. System poddano ocenie dokładności na podstawie przeprowadzonych...

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

  Publication

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

  - Journal of Machinery Manufacture and Reliability - Year 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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• Probabilistic assessment of SMRFs with infill masonry walls incorporating nonlinear soil-structure interaction

  Publication

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

  - Bulletin of Earthquake Engineering - Year 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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• An objective isogeometric mixed finite element formulation for nonlinear elastodynamic beams with incompatible warping strains

  Publication

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

  - MULTIBODY SYSTEM DYNAMICS - Year 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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• Application and mechanical properties of aluminium alloys

  Publication

  • A. Ambroziak
  • M. T. Solarczyk

  - Year 2018

  The paper presents a short survey of the application and mechanical properties of aluminium alloys. This area of scientific research is still developing, the authors restricted it to about 30 papers. Numerical simulations of the aluminium bracket are also investigated. The authors propose a solution to increase the load capacity of aluminium brackets with application of the additional cover plates. This study is proposed as an...

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• Journal of Nonlinear Functional Analysis

  Journals

  ISSN: 2052-532X

• Journal of Nonlinear Sciences and Applications

  Journals

  ISSN: 2008-1898

• Nonlinear Analysis-Hybrid Systems

  Journals

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

• Advances in Nonlinear Variational Inequalities

  Journals

  ISSN: 1092-910X

• Nonlinear Functional Analysis and Applications

  Journals

  ISSN: 1229-1595

• Journal of Applied Nonlinear Dynamics

  Journals

  ISSN: 2164-6457

• Communications on Applied Nonlinear Analysis

  Journals

  ISSN: 1074-133X

• Nonlinear Dynamics and Systems Theory

  Journals

  ISSN: 1562-8353

• Nonlinear Phenomena in Complex Systems

  Journals

  ISSN: 1561-4085 , eISSN: 1817-2458

• Journal of Computational and Nonlinear Dynamics

  Journals

  ISSN: 1555-1423 , eISSN: 1555-1415

• Nonlinear Analysis-Modelling and Control

  Journals

  ISSN: 1392-5113

• Russian Journal of Nonlinear Dynamics

  Journals

  ISSN: 2658-5324 , eISSN: 2658-5316

• Journal of Nonlinear Modeling and Analysis

  Journals

  ISSN: 2562-2854 , eISSN: 2562-2862

• JOURNAL OF NONLINEAR MATHEMATICAL PHYSICS

  Journals

  ISSN: 1402-9251 , eISSN: 1776-0852

• Applied Mathematics and Nonlinear Sciences

  Journals

  eISSN: 2444-8656

• Journal of Nonlinear and Convex Analysis

  Journals

  ISSN: 1345-4773 , eISSN: 1880-5221

• Journal of Nonlinear and Variational Analysis

  Journals

  ISSN: 2560-6921 , eISSN: 2560-6778

• STUDIES IN NONLINEAR DYNAMICS AND ECONOMETRICS

  Journals

  ISSN: 1081-1826 , eISSN: 1558-3708