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Frequency-domain realization of linear time-varying systems by two-dimensional Laplace transformation

2008 Joint 6th International IEEE Northeast Workshop on Circuits and Systems and TAISA Conference, 2008
The objective of this paper is to extend application of Laplace-Carson transform (LCT) to the realization of linear time-varying (LTV) systems. We propose using the unilateral and bilateral two-dimensional Laplace transform (2DLT) for realization of LTV systems, which exhibit a circular symmetry.
Nima Bayan, Shervin Erfani
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Two-dimensional inverse Laplace transform NMR: altered relaxation times allow detection of exchange correlation

Journal of the American Chemical Society, 1993
A pulse sequence for a two-dimensional inverse Laplace transform NMR experiment is proposed and demonstrated. The experiment is analogous to the two-dimensional Fourier transform protocol called EXSY, but detects exchange by monitoring alterations in the transverse relaxation time rather than the NMR frequency.
Jing Huei Lee   +3 more
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Process analysis in PWM inverters based on two dimensional laplace transform

International School on Nonsinusoidal Currents and Compensation 2013 (ISNCC 2013), 2013
This paper deals with a method for calculation of steady-state processes in PWM inverters with a sinusoidal output. The method depends on the introduction of an additional independent time variable and equally the presentation of the inverter output voltage in the space of two time variables as well as the transformation of a differential equation with
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NEW HYBRID LAPLACE TRANSFORM/FINITE ELEMENT METHOD FOR TWO-DIMENSIONAL TRANSIENT HEAT CONDUCTION PROBLEM

Numerical Heat Transfer, Part B: Fundamentals, 1991
This paper presents results obtained by the implementation of a new hybrid Laplace transform/finite element method developed by the authors. Test examples are used to show that the basic accuracy is comparable to that obtained by analytical, finite difference, and finite element methods.
Cha'o-Kuang Chen   +2 more
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Analytic modeling of two-dimensional transient atmospheric pollutant dispersion by double GITT and Laplace Transform techniques

Environmental Modelling & Software, 2009
An analytical solution for the transient two-dimensional atmospheric pollutant dispersion problem is presented. The approach used in this problem utilizes the double GITT (Generalized Integral Transform Technique), the Laplace Transform and the matrix diagonalization.
Cassol M, Wortmann S, Rizza U
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Analysis of Transient Electromagnetic Scattering from Two-Dimensional Open-Ended Structures by Numerical Inversion of Laplace Transform

IEICE Transactions on Electronics, 2011
A novel computational method is proposed to investigate electromagnetic scattering problems. It is error controllable and reliable simulation in time domain can be performed. We apply the proposed method to analysis of transient scattering from open-ended structures and discuss scattering mechanisms.
Shinichiro OHNUKI, Yuya KITAOKA
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Improved method of numerical inversion of two-dimensional Laplace transforms for dynamical systems simulation

9th International Conference on Electronics, Circuits and Systems, 2003
Laplace transforms in two variables can very be useful in the solution of partial differential equations describing transient behaviour of linear dynamical systems. It is often either too difficult or even impossible to obtain their originals analytically, however.
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A Laplace transformation dual‐reciprocity boundary element method for a class of two‐dimensional microscale thermal problems

Engineering Computations, 2002
This paper deals with a Laplace transformation (LT) dual-reciprocity boundary element method for the numerical solution of a two-dimensional thermal problem governed by a third order PDE. After the LT, the method reduces the problem into a system of linear algebraic equations.
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An improvement of FFT-based numerical inversion of two-dimensional Laplace transforms by means of ε-algorithm

2000 IEEE International Symposium on Circuits and Systems. Emerging Technologies for the 21st Century. Proceedings (IEEE Cat No.00CH36353), 2002
The paper describes a fast computational method for the numerical inversion of two-dimensional Laplace transforms (2D-NILT). The numerical procedure is basically that based on FFT algorithms (Brancik and Valsa, 1998), but it is improved significantly using an /spl epsiv/-algorithm to give precision to the result.
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