Auflistung Institut für Mathematik nach Titel
Anzeige der Publikationen 217-236 von 329
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2005-10-26BuchOn the Role of the Mangasarian-Fromovitz Constraint Qualification for Penalty-, Exact Penalty- and Lagrange Multiplier Methods In this paper we consider three embeddings (one-parametric optimization problems) motivated by penalty, exact penalty and Lagrange multiplier methods. We give an answer to the question under which conditions these methods ...
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2005-11-02BuchOn the stability of the Abramov transfer for differential-algebraic equations of index 1 The transfer of boundary conditions for ordinary differential equations developed by Abramov is a stable method for representing the solution spaces of linear boundary value problems. Instead of boundary value problems, ...
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2005-10-20BuchOn the stability of the Abramov-transfer for DAEs of index 1 Abramov’s transfer method for ordinary differential equations (ODE) transfers linear boundary value problems into initial value problems and systems of linear algebraic equations that have to be solved. K. Balla and R. ...
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2005-11-03BuchOne-Step Approximations For Stochastic Functional Differential Equations We consider the problem of strong approximations of the solution of It\^{o} stochastic functional differential equations (SFDEs). We develop a general framework for the convergence of drift-implicit one-step schemes to the ...
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2011-07-13BuchOperator-splitting methods for wave equations The motivation for our studies is coming from the simulation of earthquakes, that are modeled by elastic wave equations. In our paper we focus on stiff phanomenons for the wave equations. In the course of this article we ...
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2011-08-11BuchOperator-splitting methods respecting Eigenvalue problems for convection-diffusion and wave equations We discuss iterative operator splitting method for wave-equations motivated from the eigenvalue-problem to decide the splitting process. The operator-splitting methods are wel-know to solve such complicated multidimensional ...
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2011-08-11BuchOperator-Splitting Methods Respecting Eigenvalue Problems for Nonlinear Equations and Applications for Burgers Equations In this article we consider iterative operator-splitting methods for nonlinear differential equations with respect to their eigenvalues. The main feature of the proposed idea is the fixed-point iterative scheme that ...
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2011-09-27BuchOperator-Splitting Methods Respecting Eigenvalue Problems For Shallow Shelf Equations With Basal Drag We discuss different numerical methods for solving the shallow shelf equations with basal drag. The coupled equations are decomposed into operators for membranes stresses, basal shear stress and driving stress. Applying ...
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2013-09-12BuchOperator-Splitting Methods Respecting Eigenvalue Problems For Shallow Shelf Equations With Basal Drag We discuss different numerical methods for solving the shallow shelf equations with basal drag. The coupled equations are decomposed into operators for membranes stresses, basal shear stress and driving stress. Applying ...
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2005-10-26BuchOptimal Power Dispatch via Multistage Stochastic Programming The short-term cost-optimal dispatch of electric power in a generation system under uncertain electricity demand is considered. The system comprises thermal and pumped-storage hydro units. An operation model is developed ...
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2005-11-02BuchOptimal Power Generation under Uncertainty via Stochastic Programming A power generation system comprising thermal and pumped-storage hydro plants is considered. Two kinds of models for the cost-optimal generation of electric power under uncertain load are introduced: (i) a dynamic model for ...
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2005-10-21BuchOptimale Blockauswahl bei der Kraftwerkseinsatzplanung The paper addresses the unit commitment problem in power plant operation planning. For a real power system comprising coal and gas fired thermal as well as pumped storage hydro plants a largescale mixed integer optimization ...
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2005-11-17BuchOptimale Blockauswahl bei der Kraftwerkseinsatzplanung der VEAG In der vorliegenden Arbeit beschreiben wir einen LP-basierten Branch-and-Bound- und einen Lagrange-Relaxations-Zugang für das Blockauswahlproblem in der Kraftwerkseinsatzplanung, wobei moderne Ansätze und Algorithmen für ...
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2005-11-03BuchOptimale Steuerung der linearen DAE im Fall Index 2 Es wird eine notwendige Optimalitaets-Bedingung fuer das linear-quadratische Optimierungsproblem mit differentiell-algebraischen Gleichungen im Fall Index 2 bewiesen. Im ersten Schritt wird die kausale DAE betrachtet. Im ...
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2006-08-25BuchOptimization Methods and Stability of Inclusionsin Banach Spaces Our paper deals with the interrelation of optimization methods and Lipschitz stability of multifunctions in arbitrary Banach spaces. Roughly speaking, we show that linear convergence of several first order methods and ...
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2011-08-11BuchOptimizing the design of complex energy conversion systems by Branch and Cut The paper examines the applicability of mathematical programming methods to the simultaneous optimization of the structure and the operational parameters of a combined-cycle-based cogeneration plant. Thus, the optimization ...
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2005-11-04BuchOrbital Functional Series on Picard Surfaces We introduce orbital functionals $\int \boldsymbol{\beta} $ simultaneously for each commensurability class of orbital surfaces. They are realized on infinitely dimensional \emph{orbital} divisor spaces spanned by ...
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2011-09-27BuchOscillator Construction of su(n|m) Q-Operators We generalize our recent explicit construction of the full hierarchy of Baxter Q-operators of compact spin chains with su(n) symmetry to the supersymmetric case su(n|m). The method is based on novel degenerate solutions ...
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2008-03-13BuchOverlapping operator splitting methods andapplications in stiff differential equations In this article we study the stability of an overlapping operatorsplitting methods based on iterative methods. We discuss the overlapping iterative Operator Splitting method in the context of decoupling the stiff and ...
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2011-08-11BuchOverlapping Operator-Splitting Methods with Higher-Order Splitting Methods and Applications in Stiff Differential Equations In this article, we combine operator-splitting methods of an iterative and non-iterative type to problems for stiff differential equations. The time-splitting is performed with operator-splitting methods and the spatial ...