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Salim A. Messaoudi Belkacem Said-Houari 《Journal of Mathematical Analysis and Applications》2008,348(1):298-307
In this paper we consider a one-dimensional linear thermoelastic system of Timoshenko type, where the heat conduction is given by Green and Naghdi theories. We prove the exponential stability by using the energy method. 相似文献
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We apply a simple harmonic expansion method to the single-mode laser equations to analyze their dynamic properties. First,
we extend the well-known small signal analysis to predict the transient pulsations of the relaxation oscillations. Such transients
are characteristic of the laser signal relaxing towards its long-term solution, at any level of excitation, both beyond and
below the instability threshold. Secondly, we extend the method to a strong harmonic expansion to analyze the properties of
the long-term solutions. These properties are derived for typical examples, extending well beyond the boundary region of the
instability domain, for which the laser field amplitude undergoes regular pulsations around zero-mean values. 相似文献
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Belkacem Abdous Bruno Remillard 《Annals of the Institute of Statistical Mathematics》1995,47(2):371-384
Recently, quantiles and expectiles of a regression function have been investigated by several authors. In this work, we give a sufficient condition under which a quantile and an expectile coincide. We extend some classical results known for mean, median and symmetry to expectiles, quantiles and weighted-symmetry. We also study split-models and sample estimators of expectiles.Work supported by the Natural Science and Engineering Council of Canada and by the Université du Québec à Trois-Rivières. 相似文献
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In this article, we consider two porous systems of nonclassical thermoelasticity in the whole real line. We discuss the long-time behaviour of the solutions in the presence of a strong damping acting, together with the heat effect, on the elastic equation and establish several decay results. Those decay results are shown to be very slow and of regularity-loss type. Some improvements of the decay rates have also been given, provided that the initial data belong to some weighted spaces. 相似文献
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Electrochemical impedance spectroscopic (EIS) measurements of sexithiophene (6T) were carried out according to the Pt/6T/M sandwich structure configuration, for various electrode materials (M=GC, ITO, Ag, Cu, Al) and for different doping levels of copper chloride (CuCl2). The results demonstrate that two types of charge transport are involved in the redox process at the electrode/6T interface and inside the bulk oligomer. The complex-plane impedance plots obtained for various doping levels of CuCl2 exhibit arc shapes. The charge-transfer resistance measured from the diagrams decreases systematically with the addition of the salt, leading to an increase of the oligothiophene conductivity. 相似文献
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Glover TE Ackerman GD Belkacem A Heimann PA Hussain Z Lee RW Padmore HA Ray C Schoenlein RW Steele WF Young DA 《Physical review letters》2003,90(23):236102
Core-level photoemission spectroscopy provides a local probe of expansion dynamics and associated transient chemical properties as a highly pressurized, metallic fluid expands into vacuum following impulsive heating of a semiconductor by an intense, ultrashort laser pulse. Transient photoemission peak shifts reveal that metal-insulator transitions occur rapidly following laser heating. These experiments probe constituents species and solidification kinetics occurring in the early moments of material ejection and provide insight into how particles arise in the current laser ablation regime. 相似文献