نتایج جستجو برای: continuous relaxation spectrum

تعداد نتایج: 550591  

1997
Shiro Matsuoka

The high frequency end of the relaxation spectrum for polymer molecules involves the rotation of the segmental bonds. This fast relaxation process, however, cannot take place easily in the condensed state crowded by the densely packed conformers, necessitating the slower cooperatively synchronous relaxation. As the temperature is lowered, the domain of cooperativity grows towards the infinite s...

Journal: :The Journal of chemical physics 2009
Denis A Markelov Sergey V Lyulin Yuli Y Gotlib Alexey V Lyulin Vladimir V Matveev Erkki Lahderanta Anatolij A Darinskii

The developed theory of the orientational mobility of individual segments of a perfectly branched dendrimer is used to calculate the relaxation spectrum of a dendrimer. Frequency dependences of NMR relaxation 1/T(1) and of the nuclear Overhauser effect have been theoretically calculated from the Brownian dynamics simulation data. The dendrimer segmental orientational mobility is governed by thr...

1999
Vilen Melik-Alaverdian M. P. Nightingale

This paper deals with the optimization of trial states for the computation of dominant eigenvalues of operators and very large matrices. In addition to preliminary results for the energy spectrum of van der Waals clusters, we review results of the application of this method to the computation of relaxation times of independent relaxation modes at the Ising critical point in two dimensions.

2000
R. S. Anderssen

Different software packages are available commercially which can be applied to oscillatory shear data to recover an estimate of the relaxation spectrum of the viscoelastic material tested. The underlying algorithms, based on some form of regularization, are indirect and technically involved. Davies and Anderssen @J. Non-Newtonian Fluid Mech. 73, 163–179 ~1997!# have derived exact sampling local...

1998
F. Cordero C. R. Grandini G. Cannelli F. Trequattrini M. Ferretti

The anelastic spectrum ~dynamic Young’s modulus and elastic energy absorption! of La 2CuO 41d has been measured between 1 and 700 K with 0,d,0.02. The spectrum of stoichiometric La 2CuO 4 in the lowtemperature orthorhombic ~LTO! phase is dominated by two intense relaxation processes which cause softenings of 16% around 150 K and 9% below 30 K at f ;1 kHz. The relaxation at 150 K is attributed t...

2013
A. Hadjidimos D. Noutsos

Ahstract In this paper it is assumed that the point (or block) Jacobi manix. B associated with the matrix A is weakly 2-cyclic consistently ordered with complex, in general, eigen-value spectrum, a(B), lying in the interior of the infinite unit strip. It is then our objec~ live to apply and ex.tend the Young-Eidson algorithm in order to determine the real optimum relaxation factor in the follow...

Journal: :Speech Communication 2015
D. Sciamarella Guillermo Artana

Postglottal flow in low-order dynamical systems modeling vocal fold motion is customarily considered one-dimensional. A relaxation distance is however mandatory before the flow effectively complies with this approximation. A continuous vocal fold model is used to show that this relaxation distance can impact voice simulation through the coupling strength between source and tract. The degree of ...

2007
CHRISTIAN REMLING

I explore some consequences of a groundbreaking result of Breimesser and Pearson on the absolutely continuous spectrum of one-dimensional Schrödinger operators. These include an Oracle Theorem that predicts the potential and rather general results on the approach to certain limit potentials. In particular, we prove a Denisov-Rakhmanov type theorem for the general finite gap case. The main theme...

2016
OLEG SAFRONOV

where γj are selfadjoint 4× 4matrices satisfying the relations (2) γjγl + γlγj = 2δl,j . Obviously, if the domain of D0 is defined asH1(R3;C4), then D0 is a selfadjoint operator in L2(R3;C4). The spectrum of D0 is absolutely continuous, it coincides with the complement of the interval (−1, 1) as a set: σ(D0) = σa.c.(D0) = (−∞,−1] ∪ [1,∞). The multiplicity of the spectrum is infinite. We see tha...

2008
Jarmo Mäkelä

We formulate a qualitative argument, based on Heisenberg’s uncertainty principle, to support the claim that when the effects of matter fields are assumed to overshadow the effects of quantum mechanics of spacetime, the discrete spectrum of black hole radiation, as such as predicted by Bekenstein’s proposal for a discrete black hole area spectrum, reduces to Hawking’s black-body spectrum. * e-ma...

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