نتایج جستجو برای: nonlinear picone identity
تعداد نتایج: 337019 فیلتر نتایج به سال:
The role of ethnic clustering in identity formation has remained unexplored, mainly due to missing detailed data. This study closes the knowledge gap for Germany by employing a unique combination datasets, survey data from German Socio-Economic Panel and disaggregated information at low geographical levels last two but still unexploited full censuses, 1970 1987. Utilizing exogenous placement im...
The ∂̄-dressing scheme based on local nonlinear vector ∂̄-problem is developed. It is applicable to multidimensional nonlinear equations for vector fields, and, after Hamiltonian reduction, to heavenly equation. Hamiltonian reduction is described explicitely in terms of the ∂̄-data. An analogue of Hirota bilinear identity for heavenly equation hierarchy is introduced, τ -function for the hierarchy...
The main result of the paper states that almost any analytic single-input control system, which is truly nonlinear, that is not feedback linearizable, with controllable linearization at an equilibrium point, does not admit any symmetry preserving that point. By almost any system, we mean that we exclude a small class of odd systems, that admit just one nontrivial symmetry conjugated to minus id...
The state of the art presented here has been established by the participants of this European “Smart systems” network. It reflects their major examination of the three fundamental areas of modeling, optimization and control, and numerical simulation. The investigation of the modeling consists in studing the appropriate models for linear and nonlinear coupling effects, for new composite structur...
Understanding the impacts of species extinctions on the functioning of food webs is a challenging task because of the complexity of ecological interactions. We report the impacts of experimental species extinctions on the functioning of two food webs of freshwater and marine systems. We used a linear model to partition the variance among the multiple components of the diversity effect (linear g...
In this paper we consider linear Hamiltonian differential systems without the controllability (or normality) assumption. We prove the Rayleigh principle for these systems with Dirichlet boundary conditions, which provides a variational characterization of the finite eigenvalues of the associated self-adjoint eigenvalue problem. This result generalizes the traditional Rayleigh principle to possi...
the present study aimed at exploring cognitions of iranian english teachers within the context of english for academic purposes (eap). to this end, the cognitions of two groups of eap teachers with respect to their pedagogical content knowledge (pck) and their sense of professional identity (pi) were probed. two language teachers and two content instructors who had at least five years of eap te...
A. Picone,1 G. Fratesi,2 A. Brambilla,1,* P. Sessi,1 F. Donati,3 S. Achilli,2 L. Maini,2 M. I. Trioni,4 C. S. Casari,3,5 M. Passoni,3 A. Li Bassi,3,5 M. Finazzi,1 L. Duò,1 and F. Ciccacci1 1CNISM, NEMAS, and Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy 2Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, Via Cozzi 53, 20125 M...
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