نتایج جستجو برای: unperturbed chain dimensions
تعداد نتایج: 449048 فیلتر نتایج به سال:
We have measured the temperature ~T! dependence of the correlation length ~j! for concentration fluctuations in aqueous solutions of sodium–poly~styrene sulfonate! with a fixed level of added barium chloride salt. Apparent critical behavior is observed upon lowering the temperature to precipitation phase boundaries that complements our earlier work on salt-dependent behavior. We interpret exper...
The Schaechter-Bentzon-Maaløe (SBM) experiment, performed more than 40 years ago, provides an important lesson for the analysis of the eukaryotic cell cycle. Before this experiment, temperature shifts had been used to synchronize bacteria and determine the pattern of DNA synthesis during the bacterial division cycle. These experiments indicated that DNA replication occurred during a fraction of...
In this article, we prove exponential localization for wide classes of Schrr odi-nger operators, including those with magnetic elds, at the edges of unper-turbed spectral gaps. We assume that the unperturbed operator H 0 has an open gap I 0 (B ? ; B +). The random potential is assumed to be Anderson-type with independent, identically distributed coupling constants. The common density may have e...
The classical fluctuation-dissipation theorem predicts the average response of a dynamical system to an external deterministic perturbation via time-lagged statistical correlation functions of the corresponding unperturbed system. In this work we develop a fluctuation-response theory and test a computational framework for the leading order response of statistical averages of a deterministic or ...
Generalizing the degenerate KAM theorem under the Rüssmann non-degeneracy and the isoenergetic KAM theorem, we employ a quasi-linear iterative scheme to study the persistence and frequency preservation of invariant tori on a smooth sub-manifold for a real analytic, nearly integrable Hamiltonian system. Under a nondegenerate condition of Rüssmann type on the sub-manifold, we shall show the follo...
Article history: Received October 2, 2012 Received in Revised Format March 12, 2013 Accepted March 14, 2013 Available online March 15 2013 Leagile supply chain management has emerged as a proactive approach for improving business value of companies. The companies that face volatile and unpredictable market demand of their products must pioneer in leagile supply chain strategy for competition an...
It is well established that the chain dimensions of a polymer are intimately related to viscoelastic fingerprint and relevant macroscopic properties material such as entanglement modulus its melt viscosity. In this work, have been obtained by means molecular dynamics simulations computed at different temperatures in series ethylene/1-butene copolymers with constant number carbons backbone but v...
Geometry perturbations affect the eigenmodes of a resonant cavity and thereby can improve but also impair the performance characteristics of the cavity. To investigate the effects of both, intentional and inevitable geometry variations parameter studies are to be undertaken. Using common eigenmode solvers involves to perform a full eigenmode computation for each variation step, even if the geom...
We are interested in periodic solutions of a coupled system of two periodically forced ordinary differential inclusions when the first differential inclusion is weakly nonlinear with respect to a small parameter while the second differential inclusion is strongly nonlinear. We investigate two cases when the second equation of the unperturbed autonomous system has either a single or a non-degene...
This paper is focused on the bifurcation of critical periods from a quartic rigidly isochronous center under any small quartic homogeneous perturbations. By studying the number of zeros of the first several terms in the expansion of the period function in ε, it shows that under any small quartic homogeneous perturbations, up to orders 1 and 2 in ε, there are at most two critical periods bifurca...
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