نتایج جستجو برای: peaked intense temperature inversion when hence difference temperature layer

تعداد نتایج: 2531231  

سلیمانی, محمد علی , فرجامی‌شایسته, صابر ,

In this paper, ferroelectric thin films, described by an ising model in a transverse field, have been studied under the mean-field approximation. We discuss a thin film composed of N-layer film of simple cubic symmetry with nearest-neighbor exchange in which the exchange strength and transverse field are assumed to be different from the bulk values in Ns surface layers, and we derive and illust...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1390

in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...

2003
M. Fujiwara S.-P. Xie M. Shiotani H. Hashizume F. Hasebe H. Vömel S. J. Oltmans T. Watanabe

[1] Shipboard radiosonde measurements revealed a persistent temperature inversion layer with a thickness of 200 m at 12–13 km in a nonconvective region over the tropical eastern Pacific, along 2 N, in September 1999. Simultaneous relative humidity measurements indicated that the thin inversion layer was located at the top of a very wet layer with a thickness of 3–4 km, which was found to origin...

Haji Abdolvahab, R., Molaeimanesh, Gh.R. ,

Proton exchange membrane (PEM) fuel cells being employed in fuel cell vehicles (FCVs) are promising power generators producing electric power from fuel stream via porous electrodes. Structure of carbon paper gas diffusion layers (GDLs) applying in the porous electrodes can have a great influence on the PEM fuel cell performance and distribution of temperature, especially at the cathode side whe...

2006
T. Birner

[1] A vertically high resolved climatology of the thermal and wind structure of the extratropical tropopause region is presented. The climatology is based on data from 80 U.S. radiosonde stations covering the period 1998–2002. Time averages for each radiosonde station are computed using the tropopause as a common reference level for all vertical profiles within the mean. A strong inversion at t...

2006
Si-Wan Kim Jordi Vilà-Guerau de Arellano

Basic entrainment equations applicable to the sheared convective boundary layer (CBL) are derived by assuming an inversion layer with a finite depth, i.e., the first-order jump model. Large-eddy simulation data are used to determine the constants involved in the parameterizations of the entrainment equations. Based on the integrated turbulent kinetic energy budget from surface to the top of the...

Mahboubeh Hosseinpour, Masoud Sadrinasab,

Investigation of stratification in marine environments is always considered by researchers. In this study double-diffusive convection and stratification in the Bab el Mandeb strait is investigated by analyzing of field data. Measurement of seawater temperature and salinity from ARGO project (2009 to2014) and also R-V Knorr (2001) cruise with the daily average of seawater temperature and salinit...

A Sur, M Kanoria

In this work, a new mathematical model of thermoelasticity theory has been considered in the context of a new consideration of heat conduction with fractional order theory. A functionally graded isotropic unbounded medium is considered subjected to a periodically varying heat source in the context of space-time non-local generalization of three-phase-lag thermoelastic model and Green-Naghdi mod...

Journal: :فیزیک زمین و فضا 0
زهرا شرعی پور مؤسسه ژئوفیزیک دانشگاه تهران، کارشناس هواشناسی

in this paper, seasonal and diurnal variation of pollutants and the relation between meteorological parameters and the amount of pollutant concentrations is investigated. the data used were obtained from the air quality department of the municipality and from the synoptic station of the institute of geophysics. in this survey, the data used are from 2004 to 2007. the result of survey for season...

2003
D. Cimini J. A. Shaw E. R. Westwater Y. Han V. Irisov V. Leuski J. H. Churnside Ronald H. Brown

[1] A system of two scanning radiometers has been developed by the National Oceanic and Atmospheric Administration/Environmental Technology Laboratory and deployed on the NOAA R/V Ronald H. Brown during the Nauru99 cruise in the tropical western Pacific in June and July 1999. The system is composed of a high-quality temperature sensor and two independent, vertically scanning radiometers, measur...

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