Автор: Peter Dorato; Luigi Fortuna; G. Muscato Название: Robust Control for Unstructured Perturbations — An Introduction ISBN: 354054920X ISBN-13(EAN): 9783540549208 Издательство: Springer Рейтинг: Цена: 81050.00 T Наличие на складе: Есть у поставщика Поставка под заказ. Описание: These lecture notes focus on the synthesis of robust con-trollers for feedback systems, in the presence of unstruc-tured perturbations. While the interpolation approach isawkward for multivariable systems, it provides a very natu-ral and simple approach for SISO systems.
Автор: Alexander N. Petrov, Sergei M. Kopeikin, Robert R. Название: Metric theories of gravity: Perturbations and conservation laws ISBN: 3110351730 ISBN-13(EAN): 9783110351736 Издательство: Walter de Gruyter Рейтинг: Цена: 161110.00 T Наличие на складе: Есть у поставщика Поставка под заказ. Описание:
By focusing on the mostly used variational methods, this monograph aspires to give a unified description and comparison of various ways of constructing conserved quantities for perturbations and to study symmetries in general relativity and modified theories of gravity. The main emphasis lies on the field-theoretical covariant formulation of perturbations, the canonical Noether approach and the Belinfante procedure of symmetrisation. The general formalism is applied to build the gauge-invariant cosmological perturbation theory, conserved currents and superpotentials to describe physically important solutions of gravity theories. Meticulous attention is given to the construction of conserved quantities in asymptotically-flat spacetimes as well as in asymptotically constant curvature spacetimes such as the Anti-de Sitter space. Significant part of the book can be used in graduate courses on conservation laws in general relativity.
THE SERIES: DE GRUYTER STUDIES IN MATHEMATICAL PHYSICS
The series is devoted to the publication of monographs and high-level texts in mathematical physics. They cover topics and methods in fields of current interest, with an emphasis on didactical presentation. The series will enable readers to understand, apply, and develop further, with sufficient rigor, mathematical methods to given problems in physics. The works in this series are aimed at advanced students and researchers in mathematical and theoretical physics. They can also serve as secondary reading for lectures and seminars at advanced levels.
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