Zobrazeno 1 - 10
of 27
pro vyhledávání: '"I. A. Polonsky"'
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Iss 9, Pp 4633-4654 (2016)
This paper describes a numerical experiment to test the ability of the proposed geoCARB satellite to estimate emissions of trace gases (CO2, CH4 and CO) in the polluted urban environment of Shanghai. The meteorology over Shanghai is simulated with th
Externí odkaz:
https://doaj.org/article/d1aad4ac3a344c33857f9793c1bdc7fe
Publikováno v:
Atmospheric Measurement Techniques, Vol 8, Iss 11, Pp 4917-4930 (2015)
Current and proposed space missions estimate column-averaged concentrations of trace gases (CO2, CH4 and CO) from high resolution spectra of reflected sunlight in absorption bands of the gases. The radiance leaving the top of the atmosphere is partia
Externí odkaz:
https://doaj.org/article/6c2f2ec5a43b426b874e1a36c1983be5
Publikováno v:
Atmospheric Measurement Techniques, Vol 7, Iss 4, Pp 959-981 (2014)
GeoCARB is a proposed instrument to measure column averaged concentrations of CO2, CH4 and CO from geostationary orbit using reflected sunlight in near-infrared absorption bands of the gases. The scanning options, spectral channels and noise char
Externí odkaz:
https://doaj.org/article/3a1de6ebc2114e3b8efe467ac0314a62
Autor:
I. A. Polonsky, Leon M. Keer
Publikováno v:
Journal of Tribology. 124:14-19
Hard protective coatings produced by the physical vapor deposition (PVD) processes can potentially be used to prevent rolling contact fatigue (RCF) failures in gears and rolling bearings. Although TiN appears to be an attractive material for such app
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4bd71edda903db24340b3bb3b10d570
https://doi.org/10.1115/1.1395629
https://doi.org/10.1115/1.1395629
Autor:
Leon M. Keer, I. A. Polonsky
Publikováno v:
Journal of Applied Mechanics. 68:708-714
The fast Fourier transform (FFT) technique has recently been applied to stress analyses of layered elastic solids, with a great deal of success. However, the existing FFT-based methods are limited to intact solids. This paper explores the possibility
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12b11ac94c1614c4ab1108574c6a0b17
https://doi.org/10.1115/1.1381394
https://doi.org/10.1115/1.1381394
Autor:
I. A. Polonsky, Leon M. Keer
Publikováno v:
Wear. 231:206-219
An alternative numerical method for solving contact problems for real rough surfaces is proposed. The real area of contact and the contact pressure distribution are determined using a single-loop iteration scheme based on the conjugate gradient metho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a01199cd292d97d66288736ec2a42e49
https://doi.org/10.1016/s0043-1648(99)00113-1
https://doi.org/10.1016/s0043-1648(99)00113-1
Autor:
Leon M. Keer, I. A. Polonsky
Publikováno v:
Journal of Tribology. 122:36-41
A realistic description of rough surfaces will generally involve very large arrays of surface height data, which makes the application of conventional numerical methods of contact mechanics to rough contact analyses impractical. Recently, two fast nu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17053b70c7cb0f4339bc053a26115334
https://doi.org/10.1115/1.555326
https://doi.org/10.1115/1.555326
Autor:
I. A. Polonsky, Leon M. Keer
Publikováno v:
Journal of Tribology. 122:30-35
Solution of contact problems for layered elastic solids generally requires the use of numerical methods. Recently, the fast Fourier transform (FFT) technique has been applied to such contacts. While very fast, FFT is strictly applicable only to perio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d1d63a86ab8027c513a9175e6edee90
https://doi.org/10.1115/1.555323
https://doi.org/10.1115/1.555323
Publikováno v:
Wear. 215:191-204
The effect of physical vapor deposition (PVD) TiN coatings of different thicknesses on the rolling-contact fatigue (RCF) life of coated specimens is studied experimentally. Based on the results of conventional three-ball-on-rod testing, the optimum f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::172672379a4feadd984ae35d3b185d60
https://doi.org/10.1016/s0043-1648(97)00256-1
https://doi.org/10.1016/s0043-1648(97)00256-1
Publikováno v:
Wear. 208:204-219
The effect of hard coatings on the fatigue life of rolling elements subject to cyclic concentrated contact loading (such as bearing races or gears) is studied theoretically. Approximate analytical formulae are derived that can be used to estimate the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66a7b298c97735522dd7fde0368dd2c3
https://doi.org/10.1016/s0043-1648(96)07479-0
https://doi.org/10.1016/s0043-1648(96)07479-0