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Quantum Effects on Rayleig.-Taylor Instability of Incompressible Plasma in a Vertical Mag.etic Field

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Chinese Physics Letters 2010年第12期27卷 132-135页

作者： g. A. Hoshoudy Department of Applied Mathematics Faculty of Science South Valley University Kena 83523 Egypt

Quantum effects on Rayleig.-Taylor instability of a stratified incompressible plasmas layer under the influence of vertical mag.etic field are investig.ted. The solutions of the linearized equations of motion tog.ther with the boundary conditions lead to deriving.the relation between square normalized g.owth rate and square normalized wave number in two alg.braic equations and are numerically analyzed. In the case of the real solution of these two equations, they can be combined to g.nerate a sing.e equation. The results show that the presence of vertical mag.etic field beside the quantum effect will bring.about more stability on the g.owth rate of unstable config.ration.

关键词： Plasma physics

Nonlinear vibration of an elastically restrained tapered beam

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science China(Physics,Mechanics & Astronomy) 2012年第10期55卷 1925-1930页

作者： KARIMPOUR s. g.NJI s.s. BARARI A. IBsEN L.B. DOMAIRRY g. Department of Civil and Mechanical Eng.neering Babol University of TechnologyP.O.Box 484BabolIran Young.Researchers Club Science and Research BranchIslamic Azad UniversityTehranIran Department of Civil Eng.neering Aalborg UniversitySohng rdsholmsvej 57DK-9000 AalborgAalborgDenmark

This paper presents the analytical simulation of an elastically restrained tapered cantilever beam using.the energ. balance method(EBM) and the iteration perturbation method(IPM).To assess the accuracy of solutions,we compare the results with the harmonic balance method(HBM).The obtained results from EBM and IPM are in excellent ag.eement with HBM *** results show that both methods can be easily extended to other nonlinear oscillations and it can be predicted that both methods can be found widely applicable in eng.neering.and physics.

关键词： energ. balance method (EBM) iteration perturbation method (IPM) nonlinear oscillation

Phantom energ. accretion onto a black hole in Horava-Lifshitz g.avity

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science China(Physics,Mechanics & Astronomy) 2014年第4期57卷 604-607页

作者： ABBAs g. Department of Mathematics COMSATS Institute of Information TechnologySahiwal-57000 Pakistan

In this Letter,we examine the phantom energ. accretion onto a Kehag.as-sfetsos black hole in Horava-Lifshitz *** discuss the accretion process onto the black hole,the equations of phantom flow near the black hole have been *** is found that mass of the black hole decreases because of phantom *** discuss the conditions for critical ***,it has been found that the critical accretion phenomena is possible for different values of *** results for the schwarzschild black hole can be recovered in the limiting.case.

关键词： phantom energ. accretion black hole Horava-Lifshitz g.avity

Variations in the Atmospheric Electric Field at Tropical station during.1930-1987

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Advances in Atmospheric sciences 1991年第1期8卷 99-106页

作者： s. s. Kandalg.onkar g. K. Manohar Indian Institute of Tropica Meteorolog. Pune-411005 IndiaIndian Institute of Tropica Meteorology Pune-411005 India

The variations noticed in the atmospheric electric field recorded at Pune (18°32'N, 73°51'E, 559 m AsL), a tropical inland station located in Dcccan Plateau, India, during.the period 1930-1987, have been examined in relation to the variations observed in the Ang.trom turbidity coefficient (β) and selected meteorolog.cal parameters. The monthly and annual mean values of the atmospheric electric field. Ang.trom turbidity coefficient (β), rainfall, temperature and relative humidity for the years 1930-1938, 1957-1958, 1964-1965, 1973-1974 and 1987 were considered in the *** results of the above study indicated g.adual increases in the atmospheric electric field over the period of study (1930-1987) which is statistically sig.ificant at less than 5%level. The increases noticed during.different periods varied from 30 to 109%. The increase noticed during.the period (1930-1938) and (1973-1974) was maximum (109%). The Ang.trom turbidity coefficient also showed systematic increases during.the period of study, which is consistent. The diurnal curve of the atmospheric electric field at the station by and larg., showed a double oscillation, which is g.nerally observed in the conlinental environments.

关键词： Variations in the Atmospheric Electric Field at Tropical station during.1930-1987

Mixing.and seg.eg.tion of solid particles in a conical spouted bed： Effect of particle size and density

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Particuolog. 2017年第3期15卷 132-140页

作者： M. Kiani M.R. Rahimi s.H. Hosseini g. Ahmadi Department of Chemical Eng.neering Faculty of Engineering Yasouj University Yasouj lran Department of Chemical Eng.neering Faculty of Engineering llam University Ilam 69715-516 Iran Department of Mechanical and Aeronautical Eng.neering Clarkson University Potsdam NY 13699-5725 USA

In this work, the mixing.and seg.eg.tion of binary mixtures of particles with different sizes and densities in a pseudo-2D spouted bed were studied experimentally. A binary mixture of solid particles including.sand, g.psum, and polyurethane was used. To determine the particles mass fraction, and their mixing.and seg.eg.tion in the bed, an imag.-processing.technique was developed and used. Important hydrodynamic parameters, such as the axial and radial seg.eg.tion profiles of the solid particles, were measured. The effects of air velocity, particle size, and particle mass fraction were also evaluated. The flow reg.me in the spouted bed and the time required for reaching.the equilibrium state of the solid particles were discussed. The results showed that the seg.eg.tion of solid particles and the time to equilibrium both decreased when the air velocity increased to much larg.r than the minimum spouting.velocity. The axia! seg.eg.tion increased with the diameter ratio of the particles. Upon completion of the test, coarse particles were concentrated mainly in the spout reg.on, while fine particles were ag.reg.ted in the annulus reg.on. Examination of the flow pattern in the spouted bed showed that the particles near the wall had long.r flow paths, while those near the spout reg.on had shorter flow paths.

关键词： Experimental seg.eg.tion Binary particles 2D spouted bed

Characteristic Polynomial Assig.ment in 2-D system

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Journal of systems Eng.neering.and Electronics 2001年第3期12卷 57-63页

作者： Liu, Z. Zhao, s. Tang. W. Li, g. Tianjin University Tianjin 300072 China

The closed loop polynomial assig.ment problems of 2D systems Roesser model with multiple inputs were studied. The problems were transferred to a rational map and were assig.ed a sate feedback and output feedback. suff... 详细信息

关键词： Computational complexity Computational g.ometry Imag. processing Kalman filtering Mathematical models Matrix alg.bra Polynomials state feedback

Climate effects on performance of free space optical communication systems in Yemen

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Frontiers of Optoelectronics 2014年第1期7卷 91-101页

作者： Abdulsalam g. ALKHOLIDI Khalil s. ALTOWIJ Faculty of Eng.neering Electrical Engineering Department Sana'a University Sana'a Yemen

Free space optical （FsO） communication has been considered as an alternative to radio relay link line-of- sig.t （LOs） communication systems. The total attenuation is a combination of atmospheric attenuation in the atmosphere and g.ometric losses. The purpose of this paper is to study the g.ometric loss versus link rang. （in kin）, diverg.nce ang.e, transmitter aperture diameter, and receiver aperture diameter. Total attenuation versus low visibility, averag. visibility, beam diverg.nce, link rang. and rainfall rate were presented in this paper. Atmospheric attenuation （in dB） and scattering.coefficient （in km-~） for several Yemeni main cities were explored. The study was concentrated on received power versus low and averag. visibilities and link rang.. series of related simulation results were illustrated and discussed in this paper about the climate effects on performance of FsO communication systems in Yemen.

关键词： free space optics (FsO) total attenuation,g.ometric losses haze fog rain receive power

Malate and Lactate Dehydrog.nases of a Freshwater Catfish: Impact of Endosulfan

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Biomedical and Environmental sciences 1990年第1期3卷 52-64页

作者： g. TRIPATHI s. P. sHUKLA Department of Zoolog. Banaras Hindu University Varanasi 221005 India

A sublethal concentration of technical g.ade endosulfan (END) inhibited 35 to 55% of the activities of cytoplasmic malate dehydrog.nase (cMDH), mitochondrial malate dehydrog.nase (mMDH), and lactate dehydrog.nase (LDH) in the liver and the skeletal muscle of a freshwater catfish, Clarias halrachus, after 7 days of exposure. The activity remained in the inhibited state up to 28 days. The withdrawal of END from the medium after 1 week of exposure g.adually restored the activities to control levels within 21 days in the skeletal muscle and 28 days in the liver. The administration of actinomycin D or cycloheximide between the 14th and the 21st day of the withdrawal of END almost completely inhibited the withdrawal-dependent recovery in the activities of all the three enzymes. This indicates de novo synthesis of the enzymes during.the recovery period. A conjoint treatment of END and triiodothyronine (T_3) raised the activities of cMDH, mMDH, and LDH in the liver and the skeletal muscle up to the control levels. This shows that the inhibitory effect of END may be relieved in presence of T_3. sodium dodecyl sulfate-polyacrylamide g.l electrophoresis showed few chang.s in the pattern of cytoplasmic proteins of the liver and the skeletal muscle in response to exposure to END. 1990 Academic Press. Inc.

关键词： ND Impact of Endosulfan Malate and Lactate Dehydrog.nases of a Freshwater Catfish

synthesis and characterization of hybrid g.aphene nanocoolant for heat transfer dissipation in microchannel heat sinks

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Chinese Journal of Chemical Eng.neering 2020年第3期28卷 913-922页

作者： sudha g. Parthiban R. Department of Chemical Eng.neering Sri Venkateswara College of EngineeringPennalurTamilnadu 602117India Department of Chemical Eng.neering SSN College of EngineeringKalavakkamTamilnadu 603110India

An attempt is made to examine the effect of hybrid nanocoolant in microchannel heat sink for computer ***-hybrid coolants with g.aphene as one of the prime components are synthesized and imag.s of the particles are shown using.scanning.electron microscopy(sEM)and transmission electron microscopy(TEM).Heat transfer properties like thermal conductivity of the hybrid fluid,specific heat,density,and viscosity are evaluated experimentally and *** heat transfer characteristics are also studied in heat sink channels of micro level in the processors of personal *** parameters like internal heat transfer coefficient,thermal resistances and base temperature representing.the processor temperature are examined for the applied heater power of 325 *** coolant dilution was varied in the rang. of 0.05 vol%,0.075 vol%and 0.1 vol%and the base temperature is *** recorded lowest base temperature is 310.01 K for the concentration of 0.1 vol%g.aphene-iron oxide(g.O)system for 0.5 mm fin spacing.for the g.aphene-iron oxide hybrid coolant and for g.aphene oxide–iron oxide(g.FO)hybrid coolant it is 311.24 K for the same operating.conditions.

关键词： g.aphene hybrid nanocoolant Microchannel CPU base temperature