Results 41 to 50 of about 11,355 (304)
Geometric Discretization of Lagrangian Mechanics and Field Theories [PDF]
, 2009 This thesis presents a unified framework for geometric discretization of highly oscillatory mechanics and classical field theories, based on Lagrangian variational principles and discrete differential forms. For highly oscillatory problems in mechanics,
Stern, Ari Joshua
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Speed-gradient Entropy Principle for Nonstationary Processes
Entropy, 2008 The speed-gradient variational principle (SG-principle) for nonstationary far from equilibrium systems is formulated and illustrated by examples. The SG-model of transient (relaxation) dynamics for systems of a finite number of particles based on maximum
Alexander Fradkov
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Enhancing Variational Informational Principles: A Complexified Approach with Arbitrary Order Norms
MathematicsThis paper offers an innovative exploration of variational informational principles by incorporating complexification and studying norms of arbitrary order, thereby surpassing the limitations of the conventional L2 norm. For years, variational principles
D. Bernal-Casas, José M. Oller
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Fractional variational problems with the Riesz-Caputo derivative
, 2012 In this paper we investigate optimality conditions for fractional variational problems, with a Lagrangian depending on the Riesz-Caputo derivative. First we prove a generalized Euler-Lagrange equation for the case when the interval of integration of the ...
Almeida, R. +2 more
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Variational principles in the linear theory of elasticity for general boundary conditions [PDF]
, 1967 summary:Mixed boundary-value problem of the classical theory of elasticity is considered, where not only displacements and tractions are prescribed on some parts of the boundary, but also conditions of contact and elastic supports for normal and ...
Hlaváček, Ivan
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FEBS Letters, EarlyView.Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil +4 more
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Mathematical models of nonlinear longitudinal-cross oscillations of object with moving borders
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2015 The nonlinear formulation of problems for describing longitudinal-cross oscillations of objects with moving borders is noted. These mathematical models consist of a system of two nonlinear partial differential equations with the higher time derivative of
Valeriy N Anisimov, Vladislav L Litvinov
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Variational principles of second, first and intermediate kinds for non-holonomic mechanics
, 1999 The differential variational principles of second kind for non-holonomic mechanics ore given, from which a number of integral variational principles of second kind are set up. From the latter, the general relation of delta q'-delta q and the general form
Zhu, RZ (reprint author), Chinese Acad Sci, Inst Mech, Lab Nonlinear Mech Continuous Media, Beijing 100080, Peoples R China. +1 more
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Derivation of non-classical variational principles in the theory of elasticity [PDF]
, 1967 summary:Generalized variational principles, suggested by Hu Hai-Chang and Washizu or Hellinger and Reissner respectively, are derived on the base of complementary energy respectively.
Hlaváček, Ivan
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Molecular Oncology, EarlyView.Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson +9 more
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