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4篇 您的检索式:作者名="M.Yousfi"
    题名 作者 年代 出处 被引量
1New Breakdown Electric Field Calculation for SF6 High Voltage Circuit Breaker Applications显示文摘The critical electric fields of hot SF_6 are calculated including both electron andion kinetics in wide ranges of temperature and pressure,namely from 300 K up to 4000 K and2 atmospheres up to 32 atmospheres respectively.Based on solving a multi-term electron Boltz-mann equation the calculations use improved electron-gas collision cross sections for twelve SF_6dissociation products with a particular emphasis on the electron-vibrating molecule interactions.The ion kinetics is also considered and its role on the critical field becomes non negligible as thetemperature is above 2000 K.These critical fields are then used in hydrodynamics simulationswhich correctly predict the circuit breaker behaviours observed in the case of breaking tests.Ph.ROBIN-JOUAN M.YOUSFI 2007Plasma Science and Technology2007,9,6:10
2Is Antrum or Corpus the Best Site for Culture of Helicobacter pylori?显示文摘Mahmoud M.Yousfi RitaReddy Michael S.Osato David Y.Graham 2007Helicobacter2007,,2:1
3Quantitative Determination of Density of Ground State Atomic Oxygen from Both TALIF and Emission Spectroscopy in Hot Air Plasma Generated by Microwave Resonant Cavity显示文摘Two experimental techniques have been used to quantify the atomic oxygen density in the case of hot air plasma generated by a microwave(MW) resonant cavity.The latter operates at a frequency of 2.45 GHz inside a cell of gas conditioning at a pressure of 600 mbar,an injected air flow of 12 L/min and an input MW power of 1 k W.The first technique is based on the standard two photon absorption laser induced fluorescence(TALIF) using xenon for calibration but applied for the first time in the present post discharge hot air plasma column having a temperature of about4500 K near the axis of the nozzle.The second diagnostic technique is an actinometry method based on optical emission spectroscopy(OES).In this case,we compared the spectra intensities of a specific atomic oxygen line(844 nm) and the closest wavelength xenon line(823 nm).The two lines need to be collected under absolutely the same spectroscopic parameters.The xenon emission is due to the addition of a small proportion of xenon(1% Xe) of this chemically inert gas inside the air while a further small quantity of H_2(2%) is also added in the mixture in order to collect OH(AX) and NH(A-X) spectra without noise.The latter molecular spectra are required to estimate gas and excitation temperatures.Optical emission spectroscopy measurements,at for instance the position z=12 mm on the axis plasma column that leads to a gas measured temperature equal to 3500 K,an excitation temperature of about 9500 K and an atomic oxygen density 2.09×10^(17)±0.2×10^(17)cm^(-3).This is in very good agreement with the TALIF measurement,which is equal to2.0×10^(17)cm^(-3).F.MARCHAL M.YOUSFI N.MERBAHI G.WATTIEAUX A.PIQUEMAL 2016Plasma Science and Technology2016,18,3:1
4DBD-Corona Discharge for Degradation of Toxic Gases显示文摘The non-thermal plasma technology is a promising technique to treat SO2 and NO_x.Chemical radicals produced with this technology can remove several pollutants at atmosphericpressure in a very short period of time simultaneously.Both theoretical and experimental studyon SO_2 and NO_x removal,by a dielectric barrier discharge (DBD) with corona effect,is presented.M.PACHECO-PACHECO J.PACHECO-SOTELO H.MORENO-SAAVEDRA J.A.DIAZ-GOMEZ A.MERCADO-CABRERA M.YOUSFI 2007Plasma Science and Technology2007,9,6:0
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