نتایج جستجو برای: adiabatic temperature rise

تعداد نتایج: 589610  

1997
Wayne Hu Alexander S. Szalay

We assess the possibility that baryonic acoustic oscillations in adiabatic models may explain the observations of excess power in large-scale structure on 100h−1 Mpc scales. The observed location restricts models to two extreme areas of parameter space. In either case, the baryon fraction must be large (Ωb=Ω0 > 0:3) to yield signi cant features. The rst region requires Ω0 < 0:2h to match the lo...

2006
Soumen Roy Debasis Dan A. M. Jayannavar

We study the noise-induced currents and reliability or coherence of transport in two different classes of rocking ratchets. For this, we consider the motion of Brownian particles in the over damped limit in both adiabatic and non-adiabatic regimes subjected to unbiased temporally symmetric and asymmetric periodic driving force. In the case of a time asymmetric driving, we find that even in the ...

2008
Vyacheslavs Kashcheyevs

We address theoretically adiabatic regime of charge transport for a model of two tunnel-coupled quantum dots connected in series. The energy levels of the two dots are harmonically modulated by an external potential with a constant phase shift between the two. Motivated by recent experiments with surface-acoustic-wave excitation, we consider two situations: (a) pure pumping in the absence of ex...

Journal: :Applied sciences 2023

Knowledge of thermophysical properties materials is important in the design process to meet ambitious targets with respect reliability and performance many modern machinery. In this paper a simple method for measurements material presented. A bar sample heated at one end by constant heat source temperature sensors on or different locations record response. limit small Fourier-Numbers will not r...

Journal: :Physical chemistry chemical physics : PCCP 2015
Hong-Hui Wu Jiaming Zhu Tong-Yi Zhang

Phase field modelling and thermodynamic analysis are employed to investigate depolarization and compression induced large negative and positive electrocaloric effects (ECEs) in ferroelectric tetragonal crystalline nanoparticles. The results show that double-hysteresis loops of polarization versus electric field dominate at temperatures below the Curie temperature of the ferroelectric material, ...

2009
T. Majeed J. H. Waite S. W. Bougher G. R. Gladstone

[1] We use our three-dimensional Jupiter Thermosphere General Circulation Model (JTGCM) to quantify thermal processes that take place in the auroral thermosphere. These processes tend to control the thermal budget in the Jovian ovals and polar caps and maintain thermospheric temperatures consistent with those derived from multispectral observations of Jupiter’s aurora. The main heat source in t...

2001
A. V. Karnaukhov

An analysis is undertaken to reveal the role that various processes in living and nonliving nature play in the establishment of the chemical composition of the atmosphere and the temperature balance of the Earth. An inference is made that the biospheric mechanisms of CO2 removal from the atmosphere are insufficient in the situation of the current anthropogenic impact and the existence of potent...

Journal: :The Journal of chemical physics 2016
Nima Ghaderi

Expressions for a K-adiabatic master equation for a bimolecular recombination rate constant krec are derived for a bimolecular reaction forming a complex with a single well or complexes with multiple well, where K is the component of the total angular momentum along the axis of least moment of inertia of the recombination product. The K-active master equation is also considered. The exact analy...

2004
C. Welz D. Hunkeler

This paper considers the minimization of batch time for an industrial inverseemulsion polymerization reactor in the presence of uncertainty. A first optimization study resulted in the current industrial practice of a semi-adiabatic profile (isothermal operation followed by an adiabatic one), where the switching time between the two modes of operation is updated to meet the terminal constraint o...

2017
Peter Hamm Gerhard Stock

A recent paper (Phys. Rev. Lett. 109, 173201, 2012) has introduced the concept of vibrational conical intersections as a potential source of ultrafast vibrational relaxation, using the coupling between high-frequency OH modes and low-frequency intramolecular hydrogen bonding modes of malonaldehyde as an example. Here, the question is addressed whether such conical intersections may also appear ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید