Search results for: ls-dyna

• On the validation of the LS-DYNA Geo Metro numerical model

  Publication

  • D. Bruski
  • S. Burzyński
  • J. Chróścielewski
  • Ł. Pachocki
  • W. Witkowski

  - MATEC Web of Conferences - Year 2019

  The paper presents experiences gained during work with numerical model of Geo Metro vehicle used for simulations of crash tests with road safety barriers. Attention is drawn to the subject of tire/wheel breakage during collision events. Some methods for improvement of the model are presented in the paper. Several results for the normative vehicle numerical tests are introduced. Simulations were carried out using LS-DYNA finite...

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• LS-DYNA simulations of the impacts of a 38-ton Heavy Goods Vehicle into a road cable barrier

  Publication

  • K. Wilde
  • D. Bruski
  • S. Burzyński
  • J. Chróścielewski
  • Ł. Pachocki
  • W. Witkowski

  - Year 2019

  Nowadays, more and more attention is being paid to safety on roads and motorways. It is due to the continuous development of road and motorway network and a significant increase of the number of vehicles on roads. To meet the expectations of improving road safety in Poland, the Road Innovations Development (RID) research programme was implemented in 2016. The aim of the RID 3A - Road Safety Equipment (RoSE) project is a comprehensive...

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• The LS-index: A Survey

  Publication

  • M. Izydorek

  - Year 2006

  Niniejszy przegląd jest oparty na wykładach autora wygłoszonych na NATO-ASI-SMS w 2004 roku na University of Montreal w Kanadzie.Niech H będzie przestrzenią Hilberta. Rozważmy pole wektorowe f zdefiniowane na H postaci f(x)=L(x)+K(x), gdzie L jest silnie nieokreślonym, ograniczonym operatorem liniowym, a K jego pełnociągłym zaburzeniem. W tej pracy prezentujemy rozszerzenie klasycznego indeksu Conley'a na potoki generowane przez...

• The cohomological span of LS-Conley index

  Publication

  • J. Maksymiuk

  - JOURNAL OF DIFFERENTIAL EQUATIONS - Year 2015

  In this paper we introduce a new homotopy invariant – the cohomological span of LS-Conley index. We prove the theorems on the existence of critical points for a class of strongly indefinite functionals with the gradient of the form Lx+K(x), where L is bounded linear and K is completely continuous. We give examples of Hamiltonian systems for which our methods give better results than the Morse inequalities. We also give a formula...

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• DYNA-COLOMBIA

  Journals

  ISSN: 0012-7353

• DYNA-BILBAO

  Journals

  ISSN: 0012-7361 , eISSN: 1989-1490

• Method of selecting the LS-SVM algorithm parameters in gas detection process

  Publication

  • Ł. Lentka
  • J. Smulko

  - Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej - Year 2015

  In this paper we showed the method of resistive gas sensors data processing. The UV irradiation and temperature modulation was applied to improve gas sensors’ selectivity and sensitivity. Noise voltage across the sensor’s terminals (proportional to its resistance fluctuations) was recorded to estimate power spectral density. This function was an input data vector for LS-SVM (least squares – support vector machine) algorithm, which...

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• Rozpiętość kohomologiczna LS-indeksu i rozwiązania okresowe układów hamiltonowskich.

  Publication

  • J. Maksymiuk

  - Year 2014

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• Autocovariance based weighting strategy for time series prediction with weighted LS-SVM

  Publication

  • P. Majewski

  - Year 2005

  Przedstawiono metodę konstrukcji algorytmów z funkcją jądra, a także dwa algorytmy uzyskane poprzez użycie różnych funkcji straty. Zaproponowano kowariacyjną strategię ważenia algorytmów z kwadratową funkcją straty do problemu predykcji chaotycznych przebiegów czasowych.

• Determination Of Gas Mixture Components Using Fluctuation Enhanced Sensing And The LS-SVM Regression Algorithm

  Publication

  • Ł. Lentka
  • J. Smulko
  • R. Ionescu
  • C. G. Granqvist
  • L. B. Kish

  - Metrology and Measurement Systems - Year 2015

  This paper analyses the effectiveness of determining gas concentrations by using a prototype WO3 resistive gas sensor together with fluctuation enhanced sensing. We have earlier demonstrated that this method can determine the composition of a gas mixture by using only a single sensor. In the present study, we apply Least-Squares Support-Vector-Machine-based (LS-SVM-based) nonlinear regression to determine the gas concentration...

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