Prohl andreas (9 Ergebnisse)

Blue hardback cloth cover. Zustand: Good. [First Edition]. G: in good condition with rubbed and chipped dust jacket. Shelfwear and indendation at lower edge. 350mm x 260mm (14" x 10"). 72pp. Colour illustrations throughout.

Zustand: New. In English.

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - Projection methods had been introduced in the late sixties by A. Chorin and R. Teman to decouple the computation of velocity and pressure within the time-stepping for solving the nonstationary Navier-Stokes equations. Despite the good performance of projection methods in practical computations, their success remained somewhat mysterious as the operator splitting implicitly introduces a nonphysical boundary condition for the pressure. The objectives of this monograph are twofold. First, a rigorous error analysis is presented for existing projection methods by means of relating them to so-called quasi-compressibility methods (e.g. penalty method, pressure stabilzation method, etc.). This approach highlights the intrinsic error mechanisms of these schemes and explains the reasons for their limitations. Then, in the second part, more sophisticated new schemes are constructed and analyzed which are exempted from most of the deficiencies of the classical projection and quasi-compressibility methods. '. this book should be mandatory reading for applied mathematicians specializing in computational fluid dynamics.' J.-L.Guermond. Mathematical Reviews, Ann Arbor. …

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - In this work, we study numerical issues related to a common mathematical model which describes ferromagnetic materials, both in a stationary and non stationary context. Electromagnetic effects are accounted for in an extended model to study nonstationary magneto-electronics. The last part deals with the numerical analysis of the commonly used Ericksen-Leslie model to study the fluid flow of nematic liquid crystals which find applications in display technologies, for example. All these mathematical models to describe different microstructural phe nomena share common features like (i) strong nonlinearities, and (ii) non convex side constraints (i.e., I m I = 1, almost everywhere in w C JRd, for the order parameter m : w -+ JRd). One key issue in numerical modeling of such problems is to make sure that the non-convex constraint is fulfilled for computed solutions. We present and analyze different solution strategies to deal with the variational problem of stationary micromagnetism, which builds part I of the book: direct minimization, convexification, and relaxation using Young measure-valued solutions. In particular, we address the following points: - Direct minimization: A spatial triangulation 'generates an artificial exchange energy contribution' in the discretized minimizing problem which may pollute physically relevant exchange energy contributions; its minimizers exhibit multiple scales (with branching structures near the boundary of the ferromagnet) and are difficult to be computed efficiently. We exploit this observation to construct an adaptive scheme which better resolves multiple scale structures (cubic ferromagnets).…

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - This book is on the construction and convergence analysis of implementable algorithms to approximate the optimal control of a stochastic linear-quadratic optimal control problem (SLQ problem, for short) subject to a stochastic PDE. If compared to finite dimensional stochastic control theory, the increased complexity due to high-dimensionality requires new numerical concepts to approximate SLQ problems; likewise, well-established discretization and numerical optimization strategies from infinite dimensional deterministic control theory need fundamental changes to properly address the optimality system, where to approximate the solution of a backward stochastic PDE is conceptually new. The linear-quadratic structure of SLQ problems allows two equivalent analytical approaches to characterize its minimum: open loop is based on Pontryagin s maximum principle, and closed loop utilizes the stochastic Riccati equation in combination with the feedback control law. The authors will discuss why, in general, complexities of related numerical schemes differ drastically, and when which direction should be given preference from an algorithmic viewpoint.…

Paperback. Zustand: Brand New. 2001 edition. 324 pages. 9.60x6.69x0.63 inches. In Stock.

Zustand: New. 2001. Paperback. . . . . . Books ship from the US and Ireland.

Softcover. Zustand: gut. Auflage: 1 (2001). The objective of this monograph is a numerical analysis of the well-accepted models of Landau, Lifhitz an Gilbert for (electrically conducting) ferromagnets. Part I discusses convergence behavior of different finite element schemes for solving the stationary problem. Part II deals with numerical analyses of different penalization projection strategies in nonstationary micromagnetism; it closes with a chapter on nematic liquid crystals to show applicability of these new methods to further applications. Content: I: Numerical Stationary Micromagnetism - Direct Minimization - Convexified Micromagnetism - Relaxed Micromagnetism using Young Measures - II: Numerical Nonstationary Micromagnetism - The Landau-Lifshitz-Gilbert Equation - The Maxwell-Landau-Lifshitz-Gilbert Equation - Nematic Liquid Crystals - Summary and Outlook Reihe/Serie Advances in Numerical Mathematics Zusatzinfo XVIII, 304 p. 93 illus. Verlagsort Wiesbaden Sprache englisch Maße 170 x 244 mm Mathematik Informatik Mathe Wahrscheinlichkeit Kombinatorik Technik Advances in Numerical Mathematics Direct Minimization Finite Element Method Wahrscheinlichkeitstheorie Stochastik Mathematische Statistik magnetic material magnetism Magnetismus Micromagnetism Model Nematic Liquid Crystals Numerical Mathematics Numerical Nonstationary Numerical Stationary Relaxed Micromagnetism ISBN-10 3-519-00358-9 3519003589 ISBN-13 978-3-519-00358-8 9783519003588 Computational Micromagnetism Advances in Numerical Mathematics Andreas Prohl In englischer Sprache. 304 pages. 23,8 x 17 x 1,6 cm.…

Taschenbuch. Zustand: Neu. Numerical Methods for Optimal Control Problems with SPDEs | Andreas Prohl (u. a.) | Taschenbuch | SpringerBriefs on PDEs and Data Science | x | Englisch | 2026 | Springer | EAN 9789819544684 | Verantwortliche Person für die EU: Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg, juergen[dot]hartmann[at]springer[dot]com | Anbieter: preigu. …