نتایج جستجو برای: temperature profiles

تعداد نتایج: 596186  

Journal: :J. Applied Mathematics 2013
Raziana Che Aziz Ishak Hashim A. K. Alomari

An analysis has been carried out to study the flowandheat transfer in a liquid filmover a permeable stretching sheet.Using similarity transformations, the time-dependent boundary layer equations are reduced to a set of nonlinear ordinary differential equations. The resulting parameter problem and velocity as well as temperature fields are solved using the homotopy analysis method (HAM). Analyti...

2011
Tamara A. GREASBY Stephan R. SAIN TAMARA A. GREASBY STEPHAN R. SAIN

The goal of this work is to characterize the annual temperature for regional climate models. Of interest for impacts studies, these profiles and the potential change in these profiles are a new way to describe climate change and the inherent uncertainty. To that end, we propose a Bayesian hierarchical spatial model to simultaneously model the temperature profile for the four seasons of the year...

2007
J. F. Xu P. M. Thibado V. P. LaBella

Mn concentration depth profiles in Mn-doped GaAs thin films grown at substrate temperatures of 580 and 250 °C using various Mn cell temperatures have been investigated with dynamic secondary ion mass spectrometry and Auger electron spectroscopy. When the samples are grown at a low substrate temperature of 250 °C, the Mn distributes uniformly. For the samples grown at a high substrate temperatur...

Journal: :Journal of biomedical optics 2004
Bernard Choi Boris Majaron J Stuart Nelson

We report on development of an optical-thermal model to evaluate the use of pulsed photothermal radiometry (PPTR) for depth profiling of port wine stain (PWS) skin. In the model, digitized histology sections of a PWS biopsy were used as the input skin geometry. Laser induced temperature profiles were reconstructed from simulated PPTR signals by applying an iterative, non-negatively constrained ...

2010
Paul Withers D. C. Catling

[1] We report on the atmospheric structure derived from atmospheric entry of NASA’s Phoenix Mars probe using Phoenix Atmospheric Structure Experiment (ASE) data complemented by Mars Cl imate Sounder (MCS) temperature‐pressure profiles. Oscillations in temperature, caused by thermal tides, have vertical wavelengths of tens of kilometres. Their amplitudes are much larger in individual profiles th...

2009
Fabrizio Pelliccia Stefania Bonafoni Patrizia Basili Roberta Anniballe Nazzareno Pierdicca Piero Ciotti

In this work we have proposed a method based on neural networks to directly retrieve dry and wet refractivity and dry pressure profiles in troposphere (which in turn can be used to obtain temperature and humidity profiles) by using COSMIC GPS radio occultation (RO) data. To overcome the constraint of an independent knowledge of one atmospheric parameter at each GPS occultation, we trained diffe...

Journal: :The Science of the total environment 2009
Shaopeng Huang Makoto Taniguchi Makoto Yamano Chung-ho Wang

Tremendous efforts have been devoted to improve our understanding of the anthropogenic effects on the atmospheric temperature change. In comparison, little has been done in the study of the human impacts on the subsurface thermal environment. The objective of this study is to analyze surface air temperature records and borehole subsurface temperature records for a better understanding of the ur...

Journal: :Applied optics 2003
Vladimir Goloborodko Shay Keren Amir Rosenthal Boris Levit Moshe Horowitz

We demonstrate a new method for measuring changes in temperature distribution caused by coupling a high-power laser beam into an optical fiber and by splicing two fibers. The measurement technique is based on interrogating a fiber Bragg grating by using low-coherence spectral interferometry. A large temperature change is found owing to coupling of a high-power laser into a multimode fiber and t...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2000
L B Leopold

The ice cover in high mountain lakes breaks up and disappears in about an hour, in part because it has been divided into fragile vertical spindles, which are individual crystals. Contributing to this process are vertical holes in the ice remaining after particles of dust melt downward as they are warmed by the sun. Temperature profiles of lakes in the Wind River Mountains of Wyoming include tho...

1999
João C. Carvalho Fernando M. Ramos Nelson J. Ferreira Haroldo F. Campos Velho

In this paper a new regularization technique is introduced and applied to the problem of retrieval of vertical temperature profiles in the atmosphere from remote sensing data. This is a key issue in Meteorology since it provides an important input for weather forecasting models, mainly in the Southern Hemisphere, where there are large areas uncovered by data collecting ground stations. The new ...

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