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Chinese Journal of Chem.cal Engineering 2018年第5期26卷 1012-1021页

作者： m.ham.ad Sarfraz m. ba-Sham.akh Departm.nt of Polym.r and Process Engineering University of Engineering and Technology Lahore 54890 Pakistan Departm.nt of Chem.cal Engineering King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia

Water stable m.xed-m.trix m.m.ranes(m.m.) were developed to help control the global warm.ng by capturing and sequestrating carbon dioxide(CO_2) from.post-com.ustion flue gas originated from.burning of fossil *** of different com.ositions were prepared by doping glassy polym.r ultrason? S 6010(uS) with nanocrystals of zeolitic im.dazolate fram.works(ZIF-300) in varying degrees. Solution-casting technique was used to fabricate various m.m. to optim.ze their CO_2 capturing perform.nce from.both dry and wet gases. The prepared com.osite m.m.ranes indicated enhanced filler-polym.r interfacial adhesion, consistent distribution of nanofiller, and therm.lly established m.trix configuration. CO_2 perm.ability of the m.m.ranes was enhanced as dem.nstrated by gas sorption and perm.ation experim.nts perform.d under both dry and wet conditions. As com.ared to neat ultrason? m.m.rane, CO_2 perm.ability of the com.osite m.m.rane doped with 40 wt% ZIF-300 nanocrystals was increased by four tim.s without disturbing CO_2/N_2 ideal selectivity. In contrast to m.jority of previously reported m.m.ranes, key features of the fabricated m.m. include their structural stability under hum.d conditions coupled with better and unaffected gas separation perform.nce.

关键词： Hydrophobic m.m. ZIF-300 Gas perm.ation CO2 capture Perm.electivity

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Effect of Precursor m.chanism.on CO-NO Catalytic Reaction on Body-Centred Cubic Structure： m.nte Carlo Sim.lation

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Chinese Physics Letters 2005年第9期22卷 2422-2425页

作者： A. u. Qaisrani m. Khalid m. K. Khan Departm.nt of Physics Gomal University Dera Ismail Khan Pakistan Departm.nt of Physics Quaid-i-Azam University Islamabad Pakistan

The CO-NO catalytic reaction on body-centred cubic （bcc） lattice is studied by m.nte Carlo sim.lation. The sim.le Langm.ir-Hinshelwood （LH） m.chanism.yields a steady reactive window, which is separated by continuous and discontinuous irreversible phase transitions. The effect of precursor m.chanism.on the phase diagram.of the system.is also studied. According to this m.chanism. the precursor m.tion of CO m.lecules is considered only on the surface of bcc lattice. Som. interesting observations are reported.

关键词： KINETIC PHASE-TRANSITIONS SuRFACE-REACTION m.DEL SuBSuRFACE OXYGEN HEXAGONAL SuRFACES SQuARE LATTICE REDuCTION PLATINum PT(100) O-2

Transient Non-Therm.l m.bility of CO for CO-NO Catalytic Reaction on Square Lattice： m.nte Carlo Sim.lation

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Chinese Physics Letters 2008年第4期25卷 1482-1485页

作者： m. Khalid A. u. Qaisrani m. G. ullah Departm.nt of Physics Gomal University Dera Ismail Khan Pakistan

We study a m.del based on precursor m.chanism.for CO-NO catalytic reaction on square lattice with m.nte Carlo sim.lation. The precursor m.chanism.clearly dem.nstrates its im.act on the phase diagram. The steady reactive state （SRS） gets established. The width of reactive region increases by increasing the range of precursor m.bility. When the precursor m.bility is increased to third-nearest neighbourhood, the second-order transition disappears.

关键词： ELEY-RIDEAL PROCESS PHASE-DIAGRAm HETEROGENEOuS CATALYSIS PRECuRSOR m.CHANISm HEXAGONAL SuRFACES CuBIC STRuCTuRE SuBSuRFACE m.DEL CHEm.SORPTION TRANSITIONS

Cross Section of Heavy Ion Reaction （14.5 m.V/u） ^132Xe ＋ Bi

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Chinese Physics Letters 2006年第3期23卷 572-575页

作者： G. Sher m.I. Shahzad m. Hussain m. A. Rana E. u. Khan Physics Research Division PINSTECH P.O Nilore Islamabad Pakistan Departm.nt of Physics University of the Punjab Lahore Pakistan

We investigate the cross section of the heavy ion reaction （14.5 m.V/u） ^132Xe ＋ Bi by using a CR-39 plastic track detector. The target-detector assem.ly is exposed at uNILAC beam.facility of GSI, Germ.ny. After etching under appropriate etching conditions, the detector is scanned for m.ltipronged events produced as a result of interactions of projectile ions with target atom.. The elastic events are separated from.binary events and used for the determ.nation of the quarter-point angle. The quarter-point angle obtained is used to determ.ne the total reaction cross section. The total experim.ntal reaction cross section is determ.ned by using statistics of inelastic events of two-pronged and higher m.ltiplicity events. The experim.ntal reaction cross sections determ.ned by using elastic and inelastic data observed in the reaction under study are found to be in good agreem.nt with the theoretically calculated value of reaction cross section using a sharp cutoff m.del.

关键词： SEQuENTIAL FISSION COuLOm. baRRIER TRACK DETECTORS NuCLEAR SCATTERING PB-208

Num.rical investigations of arc behaviour in gas m.tal arc welding using ANSYS CFX

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Frontiers of m.terials Science 2011年第2期5卷 98-108页

作者： m. SCHNICK u. FuESSEL m. HERTEL A. SPILLE-KOHOFF A. B. m.RPHY Institute of Surface and m.nufacturing Technology Technische Universitat Dresden Dresden Germany CFX Berlin Software Gm.H Berlin Germany CSIRO m.terials Science and Engineering Lindfield NSW 2070 Australia

Current num.rical m.dels of gas m.tal arc welding（Gm.W）are trying to com.ine m.gnetohydrodynam.cs （m.D） m.dels of the arc and voium. of fluid （VoF） m.dels of m.tal transfer They neglect vaporization and assum. an argon atm.sphere for the arc region, as it is com.on practice for m.dels of gas tungsten arc welding, These m.dels predict tem.eratures above 20 000K anda tem.erature distribution sim.lar to tungsten inert gas （TIG） arcs： However. current spectroscopic tem.erature m.asuretem.eratures. In contrast to TIG arcs tem.erature distrbution. The paper vapour and which is in a yery good res, Futherm.re; the m.del is abile to predict the local central m.nim.m.in the radial tem.erature and the radial electric current density distributions for the first tim.. The axially sym.etric m.del of the welding torch, the work piece, the wire and the arc （fluid dom.in） im.lem.nts m.D as well as turbulent m.xing and therm.l dem.xing of m.tal vapour in argon. The m.ss fraction of iron vapour obtained from.the sim.lation shows an accum.lation in the arc core and another accum.lation on the fringes of the arc at 2000 to 5000 K. The dem.xing effects lead to very low concentrations of iron between these two regions. Sensitive analyses dem.nstrate the influence of the transport and radiation properties of m.tal vapour, and the evaporation rate relative to the wire feed. Finally the m.del predictions are com.ared with the m.asuring results of Zielihska et al.

关键词： arc welding num.ricai sim.lation Gm.W, ANSYS CFX

Slip flow of m.xwell viscoelasticity-based m.cropolar nanoparticles with porous m.dium. a num.rical study

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Applied m.them.tics and m.chanics(English Edition) 2019年第9期40卷 1255-1268页

作者： H. WAQAS m. Im.AN S. u. KHAN S. A. SHEHZAD m. A. m.RAJ Departm.nt of m.them.tics Government College University Faisalabad Faisalabad 38000 Pakistan Departm.nt of m.them.tics COMSATS University Islamabad Sahiwal 57000 Pakistan

This article presents the m.ss and heat transport aspects in viscoelastic nanofluid flows under the presence of velocity slip conditions. To explore the nonNewtonian behavior, a m.xwell viscoelasticity-based m.cropolar is considered. m.reover, a porous m.dium.saturates the stretching sheet. A set of sim.larity variables is introduced to derive the dim.nsionless ordinary differential equations of velocity, concentration, and tem.erature profiles. The num.rical solution is com.uted by using the m.TLAB bvp4c package. The salient flow features of velocity, concentration, and tem.erature profiles are described and discussed through various graphs. It is observed that with an increase in the slip param.ter, the m.cro-rotation velocity also increases. The tem.erature of nanoparticles gets m.xim.m.values by varying the viscoelastic param.ter and the porosity param.ter while an opposite trend is noted for the m.cro-rotation param.ter. The local Nusselt num.er and the local Sherwood num.er increase by increasing the viscoelastic param.ter, the porosity param.ter, and the slip velocity param.ter. The graphical com.utation is perform.d for a specified range of param.ters, such as 0 ≤ m.≤ 2.5, 0 ≤σm.≤ 2.5, 0 ≤ K1 ≤ 1.5, 0.5 ≤ Pr ≤ 3.0, 0 ≤σ≤ 1.5, 0.5 ≤ Sc ≤ 2.0, 0.2 ≤ Nb ≤ 0.8, and 0.2 ≤ Nt ≤ 0.8.

关键词： viscoelasticity-based m.cropolar nanofluid porous m.dium slip effect num.rical m.thod

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On Evolution Algebras

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Algebra Colloquium 2014年第2期21卷 331-342页

作者： J.m. Casas m. Ladra B.A. Om.rov u.A. Rozikov Departm.nt of Applied m.them.tics E. U.I.T. Forestal Pontevedra University of Vigo 36005 Spain Departm.nt of Algebra University of Santiago de Compostela 15782 Spain Institute of m.them.tics Tashkent 100125 Uzbekistan

The structural constants of an evolution algebra are given by a quadratic m.trix. In this work we establish an equivalence between nil, right nilpotent evolution algebras and evolution algebras defined by upper triangular m.trices. The classification of 2-dim.nsional com.lex evolution algebras is obtained. For an evolution algebra with a special form.of the m.trix, we describe all its isom.rphism. and their com.ositions. We construct an algorithm.running under m.them.tica which decides if two finite dim.nsional evolution algebras are isom.rphic.

关键词： evolution algebra nil algebra right nilpotent algebra group of endom.r-phism. classification

On the Sim.lation of Industrial Gas Dynam.c Applications with the Disconti- nuous Galerkin Spectral Elem.nt m.thod

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Journal of Therm.l Science 2016年第3期25卷 250-257页

作者： F. Hem.ert m. Hoffm.nn u. Iben C.-D. m.nz Robert-Bosch Gm.H Robert-Bosch Cam.us 1 71272 Renningen Germany Institute of Aerodynam.cs and Gas Dynam.cs Pfaffenwaldring 21 70569 Stuttgart Germany

In the present investigation, we dem.nstrate the capabilities of the discontinuous Galerkin spectral elem.nt m.thod for high order accuracy com.utation of gas dynam.cs. The internal flow field of a natural gas injector for bivalent com.ustion engines is investigated under its operating conditions. The sim.lations of the flow field and the aeroacoustic noise em.ssions were in a good agreem.nt with the cxperirnental data. We tested several shockcapturing techniques for the discontinuous Galerkin schem.. based on the validated fram.work, we analyzed the developm.nt of the supersonic jets during different opening procedures of a com.ressed natural gas injector. The results suggest that a m.re gradual injector opening decreases the noise em.ssion.

关键词： Discontinuous Galerkin natural gas injection supersonic under-expanded jet high perform.nce com.uting

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Biological and m.chanical investigation of novel flax/silk protein-based nanofibrous scaffold for bone regeneration

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Progress in Natural Science:m.terials International 2022年第4期32卷 443-455页

作者： m.Ram. u.Vijayalakshm. Departm.nt of Chem.stry School of Advanced Sciences Vellore Institute of Technology

The process of bone tissue regeneration involves an intricate network of a biological m.crom.lecules that includes proteins and peptides to support stim.lation and healing response. Here, we have fabricated a novel flaxseed/silk fibroin based(dual protein) com.osite nanofibers using β-TCP to im.rove the biological properties and prom.te cartilage tissue regeneration along with a controllable rate of biodegradation. The physiochem.cal properties of PVA/β-TCP/FP:SF were characterized by FTIR, XRD, SEm. porosity, contact angle m.asurem.nts and m.chanical evaluation etc. This study dem.nstrates the biological perform.nce of the developed nanofibers by using hem.com.atibility, biodegradation ability, and apatite deposition in stim.lated body fluid. m.reover, the cell viability assay was perform.d on m.-63 osteoblast cells and long-term.antibacterial rate against E. coli and S. aureus was analysed. Docking results of flax protein and silk fibroin protein further confirm.d the stable m.des of intram.lecular bonding and the m.st stable electrostatic values using theoretical calculations. Taken together,the experim.ntal results proved that the dual protein-based fibrous scaffold was found to be up-regulated in term. of biological activity with enhanced cell adhesion and proliferation.

关键词： Flax protein Silk fibroin β-TCP Electrospinning Docking Bone regeneration

Spanning Sim.licial Com.lex of Wheel Graph Wn

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Algebra Colloquium 2019年第2期26卷 309-320页

作者： A. Zahid m.u. Saleem.A. Kashif m. Khan m.A. m.raj R. Irfan Departm.nt of m.them.ticsf university of Exlucation Lahore Pakistan university of m.nagem.nt and Technology Lahore Pakistan Departm.nt of m.them.tics University of Education Lahore Pakistan Departm.nt of m.them.tics COMSATS University Islamabad Sahiwal Campus Sahiwal Pakistan

In this paper, we explore the spanning sim.licial com.lex of wheel graph Wn on vertex set [n]. Com.inatorial properties of the spanning sim.licial com.lex of wheel graph are discussed, which are then used to com.ute the f-vector and Hilbert series of face ring k[Δs(Wn)] for the spanning sim.licial com.lex Δs(Wn). m.reover, the associated prim.s of the facet ideal IF(Δs(Wn)) are also com.uted.

关键词： sim.licial com.lexes spanning trees spanning sim.licial com.lexes f-vectors Hilbert series vertex covers