Results 91 to 100 of about 10,394 (202)

Exchange effects in composite-particle interaction

EPJ Web of Conferences, 2012
Algebraic version of the orthogonality conditions model is developed by analogy with the algebraic version of the resonating group model. It is shown that all exchange terms excluding ones originated by the exchange kernel of the potential energy can be ...
Tchuvil’sky Yu. M., Igashov S. Yu.
doaj   +1 more source

GRAPH THEORY, IRREDUCIBILITY, AND STRUCTURAL ANALYSIS OF DIFFERENTIAL-ALGEBRAIC EQUATION SYSTEMS

, 2014
. The Σ-method for structural analysis of a differential-algebraic equation (DAE) system produces offset vectors from which the sparsity pattern of a system Jacobian is derived.
Guangning Tan, John D. Pryce, Nedialko S. Nedialkov   +2 more
core  

A Symplectic Instantaneous Optimal Control for Robot Trajectory Tracking with Differential-Algebraic Equation Models

, 2020
Robot trajectory tracking control based on differential-algebraic equation (DAE) models is still a thorny issue, because the DAEs of such systems are inherently complex and unstable, such as the high-index problem.
Liu JG(刘金国), Li F(李飞), Peng HJ(彭海军)   +2 more
core  

Grobner Bases for Nonlinear DAE Systems of Analog Circuits [PDF]

Computer Science Journal of Moldova, 2008
Systems of differential equations play an important role in modelling and analysis of many complex systems e.g. in electronics and mechanics. The following article is concerned with a symbolic analysis approach for reduction of the differential index of ...
Silke J. Spang
doaj  

Differential algebraic equations, indices, and integral algebraic equations

SIAM Journal on Numerical Analysis, 1989
In a recent report, Hairer, Lubich, and Roche [Report CH-1211, Dept. de Mathematiques, Universite de Geneve, Geneve, Switzerland, 1988] define the index of differential algebraic equations (DAEs) by considering the effect of perturbations of the equations on the solutions. This index, which will be called the perturbation index $p_i $, is one more than
openaire   +3 more sources

A Mixed Causality Approach to Residual Generation Utilizing Equation System Solvers and Differential-Algebraic Equation Theory [Elektronisk resurs]

, 2008
The FDI approach to model-based diagnosis is considered. We present a method for residual generation that combines integral and derivative causality, and also utilizes equation system solvers and theory of differential-algebraic equation systems.
Nyberg, Mattias,, Svärd, Carl,
core  

Numerical method to solve chemical differential-algebraic equations

, 2002
In this article, the solution of a chemical differential-algebraic equation model of general type F(y, y', x) = 0 has been done using MAPLE computer algebra systems. The MAPLE program is given in the Appendix.
BAYRAM, MUSTAFA, Celik, Ercan, Karaduman, E, Karaduman, Erdal, Celik, E, Bayram, M   +5 more
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Differential-algebraic equations

Scholarpedia, 2008
Stephen L. Campbell, Vu Hoang Linh, Linda R. Petzold   +2 more
openaire   +1 more source

Empirical model reduction of differential-algebraic equation systems

, 2015
This thesis addresses the reduction of differential-algebraic equation (DAE) systems. Modelling of physical or chemical processes often results in an equation system with both differential and algebraic equations.
Romijn, Reinout
core  

Applying the extended Kalman filter to systems described by nonlinear differential-algebraic equations

, 2001
This paper describes a method for the state estimation of nonlinear systems described by a class of differential-algebraic equation models using the extended Kalman filter.
V.M. Becerra, P.D. Roberts, Roberts, P. D., Griffiths, G. W., G.W. Griffiths, Becerra, Victor Manuel   +5 more
core   +1 more source