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61.
In this paper we consider the transmission problem of viscoelastic waves. That is, we study the wave propagations over materials consisting of elastic and viscoelastic components. We show that for this types of materials the dissipation produced by the viscoelastic part is strong enough to produce exponential decay of the solution, no matter how small is its size. We also show that the linear model is well posed. 相似文献
62.
63.
64.
A localized-constant model involving two capacities reliably describes two injection calorimeters: a mass-variation calorimeter
and a constant-volume calorimeter (TAM 2277 by Thermometric). The model distinguishes the place and the types of dissipation,
and its parameters depend on the rates and on the heat capacities of the liquids. In the case of the TAM 2277 calorimeter,
the dependence between the detected heat of mixing and the injection rate is revealed. The proposed model permits the inclusion
of perturbations on the baseline originating from the temperature variation of the thermostat.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
65.
María José Rivera 《Archiv der Mathematik》1989,52(2):168-172
Supported by the Comisión Asesora de Investigación Científica y Técnica, Proyecto 341-85. 相似文献
66.
67.
The two better-known ways of understanding the notion of local unconditional structure allow us to define successive extensions of the well-known class of the spaces of Lindenstrauss and Pelczynski. This paper also studies stability properties of these classes under ultrapowers, biduals and complemented subspaces.
68.
J. A. López Molina M. E. Puerta M. J. Rivera 《Bulletin of the Brazilian Mathematical Society》2006,37(2):191-216
Let
, be a family of compatible couples of Lp-spaces. We show that, given a countably incomplete ultrafilter
in
, the ultraproduct
of interpolation spaces defined by the real method is isomorphic to the direct sum of an interpolation space of type
, an intermediate K?the space between
and
being a purely atomic measure space, and a K?the function space K(Ω3) defined on some purely non atomic measure space (Ω3, ν3) in such a way that Ω2 ∪ Ω3 ≠∅.
The research of first and third authors is partially supported by the MEC and FEDER project MTM2004-02262 and AVCIT group
03/050. 相似文献
69.
Echegoyen L Chancellor CJ Cardona CM Elliott B Rivera J Olmstead MM Balch AL 《Chemical communications (Cambridge, England)》2006,(25):2653-2655
Crystallographic data for the pyrrolidine adduct Y3N@C80C4H9N x 2.5CS2 reveals a slightly pyramidalized Y3N unit with idealized mirror symmetry that straddles the site of addition but does not directly interact with the addend. 相似文献
70.
The reaction between diaminomaleonitrile (DAMN) and aldehydes and the resulting monoimines are well known. Since the standard reaction conditions involve the use of toxic solvents (typically methanol), we have sought to apply green chemistry principles to this reaction by either using water as the solvent without any catalysts or employing "solvent-free" conditions. The monoimines derived from DAMN are of interest as precursors for obtaining different heterocyclic systems and linear polymers. The methodologies used have significant advantages with regards to cost and environmental considerations. 相似文献