Results 91 to 100 of about 190,067 (305)

Determination Of Admittance And Impedance Bus Matrices Using Linear Algebra And Matlab In Electric Power Systems [PDF]

2003 Annual Conference Proceedings, 2020
Comment: 14 ...
openaire   +2 more sources

Optimal model‐based design of experiments for parameter precision: Supercritical extraction case

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study investigates the process of chamomile oil extraction from flowers. A parameter‐distributed model consisting of a set of partial differential equations is used to describe the governing mass transfer phenomena in a cylindrical packed bed with solid chamomile particles under supercritical conditions using carbon dioxide as a solvent ...
Oliwer Sliczniuk, Pekka Oinas
wiley   +1 more source

An efficient numerical algorithm for solving delay differential equations based on second kind Chebyshev polynomials

AIP Advances
This paper proposes a fast spectral technique based on second kind Chebyshev polynomials (SKCPs) to numerically solve delay differential equations (DDEs). First, we introduce some features of the SKCPs.
Mohammad Ali Ebadi, Murtadha Ali Shabeeb, Reza Ezzati, Mohammad Navaz Rasoulizadeh   +3 more
doaj   +1 more source

Iterated Ritz Method for solving systems of linear algebraic equations

Građevinar, 2017
The paper describes research state of a new iterative method for solving systems of linear algebraic equations. The method is suitable for extremely large systems with sparse matrices.
Josip Dvornik, Damir Lazarević
doaj   +1 more source

Subuniformity of harmonic mean p$$ p $$‐values

Canadian Journal of Statistics, EarlyView.
Abstract We obtain several inequalities on the generalized means of dependent p$$ p $$‐values. In particular, the weighted harmonic mean of p$$ p $$‐values is strictly subuniform under several dependence assumptions of p$$ p $$‐values, including independence, negative upper orthant dependence, the class of extremal mixture copulas, and some Clayton ...
Yuyu Chen, Ruodu Wang, Yuming Wang, Wenhao Zhu   +3 more
wiley   +1 more source

A Markov approach to credit rating migration conditional on economic states

Canadian Journal of Statistics, EarlyView.
Abstract We develop a model for credit rating migration that accounts for the impact of economic state fluctuations on default probabilities. The joint process for the economic state and the rating is modelled as a time‐homogeneous Markov chain. While the rating process itself possesses the Markov property only under restrictive conditions, methods ...
Michael Kalkbrener, Natalie Packham
wiley   +1 more source

Inversion of linear dynamical systems under conditions of quasiharmonic signals

Вісник Національного технічного університету "ХПÌ": Системний аналіз, управління та інформаційні технології, 2018
The methods of inversion of dynamical systems are widely used for solving the problems of controlling mechanical and electrical systems. The inverting of dynamic systems is an effective way of implementing processes of control according to disturbance ...
Oleksandr Sergijovych Kutsenko, Vladimir Igorevych Tovazhnyanskiy   +1 more
doaj   +1 more source

Resonance‐induced restoration of rock permeability degraded by heavy components of crude oil

Deep Underground Science and Engineering, EarlyView.
Resonance‐induced changes occur in filtration properties of sedimentary rocks in crude paraffin oil flow under acoustic vibrations. Experimental data on (a) pressure drop; (b) permeability; (c) pressure at the rock inlet; and (d) pressure at the rock outlet are presented.
Evgenii Riabokon, Qian Yin, Mikhail Guzev, Mikhail Turbakov, Evgenii Kozhevnikov, Nadezhda Riabokon, Ivan Panteleev   +6 more
wiley   +1 more source

NUMERICAL SOLUTIONS OF HERMITE DIFFERENTIAL EQUATIONS USING LEGENDRE MULTIWAVELETS

Barekeng
This paper presents a numerical method for solving Hermite differential equations (HDEs) using operational integration matrices derived from Legendre multiwavelets of linear, quadratic, and cubic orders.
Meenu Devi, Sunil Rawan, Sushil Chandra Rawan, Vineet Kishore Srivastava   +3 more
doaj   +1 more source

Spectral theory and nonlinear problems Théorie spectrale et problèmes non-linéaires [PDF]

Surveys in Mathematics and its Applications, 2010
We present a Lie algebra theoretical schema leading to integrable systems, based on the Kostant-Kirillov coadjoint action. Many problems on Kostant-Kirillov coadjoint orbits in subalgebras of infinite dimensional Lie algebras (Kac-Moody Lie algebras)
Ahmed Lesfari
doaj