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Utiliza.ion of Ma.well-Ca.ta.eo la. for MHD swirling flow through oscilla.ory disk subject to porous medium

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a.plied Ma.hema.ics a.d Mecha.ics(English Edition) 2019年第6期40卷 837-850页

作者： a. Ra.F Z. a.Ba. S. a. SHEHZa. Depa.tment of Ma.hema.ics The Islamia University of BahawalpurBahawalpur 63100Pakistan Depa.tment of Ma.hema.ics COMSATS University IslamabadSahiwal 57000Pakistan

The present study a.ms to investiga.e the sa.ient fea.ures of incompressible, hydroma.netic, three-dimensiona. flow of viscous fluid subject to the oscilla.ory motion of a.disk. The rota.ing disk is conta.ned in a.porous medium. Furthermore, a.time-inva.ia.t version of the Ma.well-Ca.ta.eo la. is implemented in the energy equa.ion. The flow problem is norma.ized by obta.ning simila.ity va.ia.les. The resulting nonlinea. system is solved numerica.ly using the successive over-rela.a.ion method. The ma.n results a.e discussed through gra.hica. representa.ions a.d ta.les. It is perceived tha. the therma. rela.a.ion time pa.a.eter decrea.es the tempera.ure curves a.d increa.es the hea. tra.s- fer ra.e. The oscilla.ory curves for the velocity field demonstra.e a.decrea.ing tendency with the increa.ing porosity pa.a.eter va.ues. Two- a.d three-dimensiona. flow phenom- ena.a.e a.so shown through gra.hica. results.

关键词： time-dependent flow oscilla.ory disk porous medium ma.netohydrody-na.ic (MHD) Ma.well-Ca.ta.eo la. numerica. solution

Ca.BON NITRIDE FILMS PREPa.ED a. DIFFERENT N_2/a. Ra.IOS BY CLOSED FIELD UNBa.a.CED REa.TIVE Ma.NETRON SPUTTERING

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a.ta.Meta.lurgica.Sinica.English Letters) 2005年第3期18卷 280-288页

作者： a. Vya. Depa.tment of Ma.ufa.turing Engineering a.d Engineering Ma.a.ement (MEEM) City University of Hong Kong Kowloon Hong Kong China

Ca.bon nitride (CNx) thin films ha.e been deposited onto Si(100) (for structura. a.d mecha.ica. a.a.yses) a.d M42 high-speed-steel (for tribologica. mea.urement s) substra.es a. room tempera.ure by closed-field unba.a.ced ma.netron sputterin g. The mecha.ica. a.d tribologica. properties of these films were highly depende nt on the N/C concentra.ion ra.io tha. wa. a.justed by the F(N2)/F(a.) flow-ra.e ra.io a. fixed substra.e bia.ing of -60V during deposition. The films were cha. a.terized by employing sca.ning electron microscopy (SEM), a.omic force microsco py (a.M), na.o-indenta.ion mea.urements, X-ra. photoelectron spectroscopy (XPS), Ra.a. sca.tering a.d Fourier tra.sform infra.ed (FTIR) spectroscopy, pin-on-dis c tribometer, scra.ch tester, a.d Rockwell-C tester. The results showed tha. the N content in the films increa.ed with the N2 pressure. However, the ma.imum N/C ra.io obta.ned wa. 0.25. The na.oha.dness wa. mea.ured to be in the ra.ge of 11 .7-20.8GPa.depending on the N/C ra.ios. The XPS N 1s spectra.showed the existenc e of both N-C sp2 a.d N-C sp3 bonds in films. Ra.a. a.d FTIR spectra.exhibited t ha. N-C bonds were fewer when compa.ed to other N-C bonds. The friction coeffici ent of the film deposited onto steel substra.e with N/C=0.26 wa. mea.ured to be ~0.08 a.d for film with N/C=0.22 a.high critica. loa. of 70N wa. obta.ned. The t ribologica. da.a.a.so showed tha. the wea. ra.es of these films were in the ra.g e of ~10-16m3/Nm, indica.ing excellent wea. resista.ce for CNx films.

关键词： ca.bon nitride X-ra. photoelectron spectroscopy Ra.a. spectroscop y pin-on disc wea. test tribology

Effect of combining the meta.s of group VI supported on H-ZSM-5 zeolite a. ca.a.ysts for non-oxida.ive conversion of na.ura. ga. to petrochemica.s

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Journa. of Na.ura. Ga. Chemistry 2009年第1期18卷 71-77页

作者： a. K. a.oul-Gheit a. E. a.a.a.la. Process Development Division Egyptian Petroleum Research Institute Nasr City P. O. Box 9540 Cairo 11787 Egypt

The most prestigious ca.a.yst a.plied in na.ura. ga. （metha.e） non-oxida.ive conversion to petrochemica.s is 6%Mo/H-ZSM-5. Chromium, molybdenum a.d tungsten a.e the group VI meta.s. Hence, in this work, 6%Mo/H-ZSM-5 wa. correla.ed with 3%Cr＋3%Mo/H-ZSM-5 a.d 3%W＋3%Mo/H-ZSM-5 a. ca.a.ysts to exa.ine their promoting or inhibiting effects on the va.ious rea.tions ta.ing pla.e during metha.e conversion. The ca.a.ytic a.tivities of these ca.a.ysts were tested in a.continuous flow fixed bed rea.tor a. 700℃ a.d a.GHSV of 1500 ml·g^-1·h^-1 Cha.a.teriza.ion of the ca.a.ysts using XRD, TGa.a.d TPD were investiga.ed. XRD a.d NH3-TPD showed grea.er intera.tion between the W-pha.e a.d the Bronsted a.id sites in the cha.nels of the zeolite tha. between Cr-pha.e a.d the a.id sites in the zeolite.

关键词： na.ura. ga. metha.e benzene na.htha.ene hydrogen molybdenum chromium tungsten H-ZSM-5 zeolite

Stra.ified ma.netohydrodyna.ic flow of ta.gent hyperbolic na.ofluid induced by inclined sheet

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a.plied Ma.hema.ics a.d Mecha.ics(English Edition) 2017年第2期38卷 271-288页

作者： T. Ha.a. M. MUMTa. a. SHa.IQ a. a.Sa.DI Depa.tment of Ma.hema.ics Quaid-i-Azam University 45320 Islamabad 44000 Pakistan Nonlinea. a.a.ysis a.d a.plied Ma.hema.ics (Na.M) Resea.ch Group Department of Mathematics Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia Depa.tment of Ma.hema.ics Preston University Kohat Islamabad Campus Islamabad 44000 Pakistan

This pa.er studies stra.ified ma.netohydrodyna.ic （MHD） flow of ta.- gent hyperbolic na.ofluid pa.t a. inclined exponentia.ly stretching surfa.e. The flow is subjected to velocity, therma., a.d soluta. bounda.y conditions. The pa.tia. differentia. systems a.e reduced to ordina.y differentia. systems using a.propria.e tra.sforma.ions. The reduced systems a.e solved for convergent series solutions. The velocity, tempera.ure, a.d concentra.ion fields a.e discussed for different physica. pa.a.eters. The results indi- ca.e tha. the tempera.ure a.d the therma. bounda.y la.er thickness increa.e noticea.ly for la.ge va.ues of Brownia. motion a.d thermophoresis effects. It is a.so observed tha. the buoya.cy pa.a.eter strengthens the velocity field, showing a.decrea.ing beha.ior of tempera.ure a.d na.opa.ticle volume fra.tion profiles.

关键词： two-dimensiona. ma.netohydrodyna.ic (MHD) flow ta.gent hyperbolicna.ofluid mixed convection exponentia. stretching double stra.ifica.ion inclined sheet

Ma.hema.ica. model for the cilia.y-induced tra.sport of semina. liquids through the ductuli efferentes

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Interna.iona. Journa. of Bioma.hema.ics 2017年第3期10卷 1-17页

作者： a. a. Fa.ooq a. M. Siddiqui Depa.tment of Ma.hema.ics COMSa.S Institute of Informa.ion Technology Tobe Ca.p Abbottabad Pakistan Depa.tment of Ma.hema.ics Pennsylvania State University York Campus York PA 17403-3398 USA

This study describes the consequences of the cilia.y motion on the tra.sport of semina. liquid through the ductus efferentes of the ma.e reproductive tra.t. By a.suming the semina. liquid a. a.couple stress fluid, we ha.e formula.ed a.ma.hema.ica. model for a.two-dimensiona. flow through a. a.ia.ly symmetric tube whose inner surfa.e is cilia.ed in the form of a.meta.hrona. wa.e. The governing system consists of nonlinea. coupled pa.tia. differentia. equa.ions which is reduced to a.system of ordina.y differentia. equa. tions by utilizing the long wa.elength a.proxima.ion in a. environment of the inertia.free flow. Exa.t solutions for the velocity distribution, the pressure gra.ient a.d the strea. function a.e obta.ned in terms of the couple stress pa.a.eters a.d the cilia.y meta.hronism. Specia. a.tention is given to the pumping a.d the tra.ping cha.a.teristics due to the cilia.motility. The study revea.s tha. the cilia.y pumping ha. to be more efficient to tra.sport a.couple stress fluid a. compa.ed to a.Newtonia. fluid. Moreover, the theoretica. results for the couple stress fluid a.e found to be in good a.reement with those reported by IT. J. La.dner a.d W. J. Sha.k, Cilia.tra.sport, Bull. Ma.h, Biophys, 34 （1972） 325-335]. The a.a.ytica. results a.e a.so displa.ed in gra.hica. form.

关键词： Cilia.y-induced flow meta.hrona. wa.e couple stress fluid a.isymmetric tube.

a. Efficient a.d Convenient Synthesis of Imida.olines a.d Benzimida.oles via.Oxida.ion of Ca.bon-Nitrogen Bond in Wa.er Media

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Chinese Journa. of Chemistry 2012年第4期30卷 924-928页

作者： Sha.kh,Ka.eer a. Pa.il,Visha. a. Sha.kh,Pa.veen a. Orga.ic Synthesis La.ora.ory Department of ChemistrySir Sayyed CollegeAurangabad-431001MaharashtraIndia

The meta. coordina.ion complex K4[Fe（CN）6] is a. efficient a.d environmenta.ly benign ca.a.yst for the syn- thesis of imida.olines a.d benzimida.oles from va.ious a.dehydes a.d 1,2-dia.ines in a.ueous medium a. room... 详细信息

关键词： a.dehyde 1,2-dia.ines Ka.Fe(CN)6] imida.olines benzimida.oles wa.er

Effect of growing media.a.d their constituents on fungus gna., Bra.ysia.sp, nr, coprophila.（Lintner） a.ults

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Insect Science 2007年第6期14卷 467-475页

作者： Ra.MOND a. CLOYD a.Y DICKINSON RICHa.D a. La.SON Ka.EN a. Ma.LEY Depa.tment of Entomology Kansas State University Manhattan Kansas Division of Biodiversity a.d Ecologica. Entomology Illinois Natural History Survey Champaign Illinois University of Illinois Department of Natural Resources and Environmental Sciences Urbana Illinois USA

This study wa. conducted to determine the a.tra.tiveness of two growing media. commonly utilized in greenhouses, to fungus gna., Bra.ysia.sp. nr. coprophila.a.ults. The constituents of the most a.tra.tive growing medium tested were determined by ga. chroma.ogra.hy a.a.ysis using a.stea.-distilla.ion procedure. We found tha. fungus gna. a.ults were more a.tra.ted to the growing medium, SB300 Universa. Professiona. Growing Mix, which conta.ns composted ba.k, tha. to a.other growing medium （Sunshine LC1 Mix） a.d their components when tested in a.series of la.ora.ory experiments using multiple-choice experimenta. a.ena.. a.higher percenta.e of fungus gna. a.ults were a.tra.ted to moist SB300 （92%） tha. SB300 growing medium tha. ha. been oven dried （8%）. In a.dition, fungus gna. a.ults preferred SB300 a.though they ha. been rea.ed on Sunshine LC1 Mix. When compa.ing the SB300 fresh from the ba. to growing medium tha. ha. been pa.teurized a.d moistened with wa.er, ga. chroma.ogra.hic-ma.s spectroscopic da.a.showed there were declines in severa. terpenoid constituents a. well a. a. increa.e in fa.ty a.ids a.d cyclosulfur. The results of this study indica.e tha. B. sp. nr. coprophila.a.ults prefer certa.n growing media. which ma. a.sist greenhouse producers in ma.a.ing fungus gna.s in crop production systems.

关键词： a.tra.tion fungus gna.s growing medium pest ma.a.ement preference,stea. distilla.ion

Ma.imum Pa.h Informa.ion a.d Fokker-Pla.ck Equa.ion

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Chinese Physics Letters 2008年第4期25卷 1165-1167页

作者：李炜 Q. a. Wa.g a. Le Meha.te Complexity Science Center a.d Institute of Pa.ticle Physics Huazhong Normal University Wuhan 430079 Institut Superieur des Ma.eia.x du Ma.s 44 Avenue F.A. Bartholdi 72000 Le Mans France

We present a.rigorous method to derive the nonlinea. Fokker-Pla.ck （FP） equa.ion of a.oma.ous diffusion directly from a.genera.iza.ion of the principle of lea.t a.tion of Ma.pertuis proposed by Wa.g [Cha.s, Solitons ＆ Fra.ta.s 23 （2005） 1253] for smooth or qua.i-smooth irregula. dyna.ics evolving in Ma.kovia. process. The FP equa.ion obta.ned ma. ta.e two different but equiva.ent forms. It wa. a.so found tha. the diffusion consta.t ma. depend on both q （the index of Tsa.lis entropy [J. Sta.. Phys. 52 （1988） 479] a.d the time t.

关键词： Ma.HEMa.ICa.-THEORY COMMUNICa.ION DYNa.ICS

Forma.ion of Cha.ged Pa.ticle Tra.ks in Solids

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Chinese Physics Letters 2006年第6期23卷 1448-1451页

作者： Mukhta. a. Ra.a Physics Resea.ch Division PINSTECH PO Nilore Islamabad Pakistan

a.criterion for forma.ion of etcha.le tra.ks in solids is suggested using the well-known concepts of ioniza.ion a.d therma. spikes, diffusion process with useful a.d justified a.sumptions, a.d present or published experimenta. a.d theoretica. investiga.ions on the sa.e subject. The suggested criterion is useful for a.wide spectrum of resea.chers including development a.d a.plica.ions of tra.k recording ma.eria.s, ions impla.ta.ion, sputtering a.d other a.ea., which include intera.tions of cha.ged pa.ticles with solids.

关键词： Ra.Ia.ION-Da.a.E a.TIVa.ION-ENERGY a.GER ELECTRONS CR-39 DETECTORS