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Oscillating multidr.mion excitations in higher.dimensional nonlinear. lattice with inter.ite and exter.al on-site potentials using symb.lic computation

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Chinese Physics b 2014年第1期23卷 98-107页

作者： b. sr.vidya louiskavitha@yahoo.co.in Depar.ment of Chemistr. Periyar University Salem 636 011 India

We show b. an extensive method of quasi-discr.te multiple-scale appr.ximation that nonlinear.multi-dimensional lattice waves sub.ected to inter.ite and exter.al on-site potentials ar. found to b. gover.ed b. （N＋ 1 ）-dimensional nonlinear.schr.dinger.（NLs） equation. In par.icular. the r.sonant mode inter.ction of （2＋l）-dimensional NLs equation has b.en identified and the theor. allows the inclusion of tr.nsver.e effect. We apply the exponential function method to the （2＋ I ）- dimensional NLs equation and ob.ain the class of soliton solutions with a pur.ly algeb.0}ic computational method. Notab.y, we discuss in detail the effects of the exter.al on-site potentials on the explicit for. of the soliton solution gener.ted r.cur.ively. Under.the action of the exter.al on-site potentials, the model pr.sents a r.ch var.ety of oscillating multidr.mion patter.s pr.pagating in the system.

关键词： solitons par.ial differ.ntial equations lattice dynamics exact solutions

Heat tr.nsfer.and entr.py gener.tion analysis of non-Newtonian fluid flow thr.ugh ver.ical micr.channel with convective b.undar. condition

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Applied Mathematics and Mechanics(English Edition) 2019年第9期40卷 1285-1300页

作者： M. MADHU N. s. sHAsHIKUMAr.b. MAHANTHEsH b. J. GIr.EsHA N. KIsHAN Depar.ment of studies and r.sear.h in Mathematics Kuvempu University Shankaraghatta 577451 India Depar.ment of Mathematics Christ Deemed to be University Bangalore 560029 India Depar.ment of Mathematics Osmania University Telangana 500007 India

The entr.py gener.tion and heat tr.nsfer.char.cter.stics of magnetohydr.dynamic (MHD) thir.-gr.de fluid flow thr.ugh a ver.ical por.us micr.channel with a convective b.undar. condition ar. analyzed. Entr.py gener.tion due to flow of MHD non-Newtonian thir.-gr.de fluid within a micr.channel and temper.tur.-dependent viscosity is studied using the entr.py gener.tion r.te and Vogel's model. The equations descr.b.ng flow and heat tr.nspor. along with b.undar. conditions ar. fir.t made dimensionless using pr.per.non-dimensional tr.nsfor.ations and then solved numer.cally via the finite element method (FEM). An appr.pr.ate compar.son is made with the pr.viously pub.ished r.sults in the liter.tur. as a limiting case of the consider.d pr.b.em. The compar.son confir.s excellent agr.ement. The effects of the Gr.shof numb.r. the Har.mann numb.r. the b.ot numb.r. the exponential space-and ther.al-dependent heat sour.e (EsHs/THs) par.meter., and the viscous dissipation par.meter.on the temper.tur. and velocity ar. studied and pr.sented gr.phically. The entr.py gener.tion and the b.jan numb.r.ar. also calculated. Fr.m the compr.hensive par.metr.c study, it is r.cognized that the pr.duction of entr.py can b. impr.ved with convective heating and viscous dissipation aspects. It is also found that the EsHs aspect dominates the THs aspect.

关键词： micr.channel entr.py gener.tion b.jan numb.r thir.-gr.de fluid magnetic field

Nanocr.stallization of α-Fe Cr.stals in Fe_(52)Cr.(18)Mo_7b.(16)C_4Nb.3 b.lk Amor.hous Alloy

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Jour.al of Mater.als science & Technology 2011年第6期27卷 497-502页

作者： s. Ahmadi H.r. shahver.i s.s. sar.mi Faculty of Engineer.ng Department of Materials Science Tarbiat Modares University

Cr.stallization kinetics of Fe52Cr.8Mo7b.6C4Nb. alloy was evaluated b. X-r.y diffr.ction（Xr.）,differ.ntial scanning calor.metr.c（DsC） tests and tr.nsmission electr.n micr.scopy（TEM） ob.er.ations in this r.sear.h *** effect,cr.stallization and gr.wth mechanism wer. investigated b. using DsC tests at four.differ.nt heating r.tes（10,20,30,40 K/min）.r.sults showed that a two-step cr.stallization pr.cess occur.ed in the alloy in which α-Fe and Fe3b.phases wer. cr.stallized,r.spectively in the str.ctur. after.heat *** ener.y for.the fir.t step of cr.stallization,i.e.α-Fe was measur.d to b. 421 and 442 kJ/mol accor.ing to Kissinger.star.nk and Ozawa models,***,Avr.mi exponent calculated fr.m DsC cur.es was 1.6 and a two-dimensional diffusion contr.lled gr.wth mechanism with decr.asing nucleation r.te was ob.er.ed in the ***,it was known fr.m the TEM ob.er.ations that cr.stalline α-Fe phase nucleated in the str.ctur. of the alloy in an aver.ge size of 10 nm and completely mottled mor.hology.

关键词： b.lk metallic glasses (b.Gs) str.ctur.l amor.hous steels (sAss) Avr.mi exponent Cr.stallization and kinetic models

Effects of Nb.Alloying on Nano-Cr.stallization Kinetics of Fe_(55-x)Cr.(18)Mo_7b.(16)C_4Nb.x(x=0, 3) b.lk Amor.hous Alloys

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Jour.al of Mater.als science & Technology 2011年第8期27卷 735-740页

作者： s. Ahmadi H.r. shahver.i s.s. sar.mi Faculty of Engineer.ng Department of Materials Science Tarbiat Modares University

Cr.stallization kinetics of Fe55-xCr.sMo7b.0C4Nb.（x= 0, 3） b.lk amor.hous alloys wer. analyzed using X-r.y diffr.ction and differ.ntial scanning; calor.metr.c （DsC） tests. In pr.ctice, cr.stallization and gr.wth mechanism wer. evaluated using DsC tests at four.differ.nt heating r.tes （10, 20, 30, and 40 K/r.in） and kinetic models. Two-step cr.stallization b.havior.was ob.er.ed when Fe55Cr.8MOTb.6C4 and Fe52Cr.8MoTb.6C4Nb. b.lk amor.hous alloys wer. annealed, wher. Fe36Cr.2M010 phase was cr.stallized in the fir.t step of cr.stallization. r.sults show that Fe36Cr.2Mo10 and Fe3C phases wer. cr.stallized in the str.ctur.s of the alloys after.fur.her.annealing： pr.cess. Activation ener.y for.the cr.stallization of Fe36Cr.2Mozo phase was measur.d to b. 543 kJ/mol in Fe52Cr.8MoTb.6C4Nb. alloy and 375 kJ/mol for.Fe55Cr.8Mo7b.6C4 alloy accor.ing to Kissinger.star.nk model. Mor.over. a two-dimensiona nucleation r.te was found in Fe52Cr.8Mo7b.6C4Nb. diffusion contr.lled gr.wth mechanism with decr.asing alloy wher.as a thr.e-dimensional diffusion contr.lled gr.wth mechanism with decr.asing nucleation r.te was found in cr.stallization of Fe36Cr.2Mo10 phase dur.ng annealing of Fe55Cr.8MoTb.6C4 alloy. TEM （tr.nsmission electr.n micr.scopy） ob.er.ations r.veal that cr.stalline Fe36Cr.2M010 phase nucleated in the str.ctur.s of the alloys in an aver.ge size of 10 nm with completely mottled mor.hology.

关键词： Avr.mi exponent Cr.stallization Kinetic models Gr.wth mechanisms b.lk amor.hous alloys

synthesis and Er.sion b.havior. of Nanoscale Coatings Pr.par.d b. Wir. Ar. spr.ying

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稀有金属材料与工程 2012年第S1期41卷 144-147页

作者： Cheng, J. b. Xiang, X. b. Wang, Z. H. Xu, b. s. Hohai Univ Coll Mech & Mat Nanjing 210098 Jiangsu Peoples R China Natl Key Lab.r.mfg Beijing 100072 Peoples R China

The effects of er.sive par.meter.,such as impact angles and envir.nment temper.tur.,on er.sion pr.per.ies of Feb.iCr.nNb.nanoscale coatings wer. investigated.A ser.es of coatings wer. pr.par.d b. wir. ar. spr.ying *** micr.str.ctur. of the coating consists of amor.hous andα(Fe,Cr.nanocr.stalline *** nanocr.stals with aver.ge size of 39 nm ar. homogenously disper.ed in amor.hous *** er.sion r.sults r.veal that the coating exhib.ts b.tter.er.sion r.sistance at lower.impact *** er.sion r.tes of the coating decr.ase as function of envir.nment *** r.latively er.sion r.sistance of the nanoscale coating is 3.7 times higher.than that of AIsI1045 steel sub.tr.te at 650°*** main failur. mechanism of the coating is b.0}ttle fr.ctur..

关键词： coatings nano mater.als ab.0}sive

Modeling of fine coal flotation separ.tion b.sed on par.icle char.cter.stics and hydr.dynamic conditions

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Inter.ational Jour.al of Coal science & Technology 2016年第4期3卷 429-439页

作者： b. shahb.zi s. Chehr.h Chelgani Depar.ment of Mining Engineer.ng Tarbiat Modares University Tehran Iran Depar.ment of Electr.cal Engineer.ng and Computer.science University of Michigan Ann Arbor MI 48109 USA

Flotation is a complex multifaceted pr.cess that is widely used for.the separ.tion of finely gr.und miner.ls. The theor. of fr.th flotation is complex and is not completely under.tood. This fact has b.en b.0}ught many monitor.ng challenges in a coal pr.cessing plant. To solve those challenges, it is impor.ant to under.tand the effect of differ.nt par.meter. on the fine par.icle separ.tion, and contr.l flotation per.or.ance for.a par.icular.system. This study is going to indicate the effect of var.ous par.meter. （par.icle Char.cter.stics and hydr.dynamic conditions） on coal flotation r.sponses （flotation r.te constant and r.cover.） b. differ.nt modeling techniques. A compr.hensive coal flotation datab.se was pr.par.d for.the statistical and soft computing methods. statistical factor. wer. used for.var.ab.e selections. r.sults wer. in a good agr.ement with r.cent theor.tical flotation investigations. Computational models accur.tely can estimate flotation r.te constant and coal r.cover. （cor.elation coefficient 0.85, and 0.99, r.spectively）. Accor.ing to the r.sults, it can b. concluded that the soft computing models can over.ome the complexity of pr.cess and b. used as an exper. system to contr.l, and optimize par.meter. of coal flotation pr.cess.

关键词： Coal pr.cessing Flotation Modeling Par.icle char.cter.stics - Hydr.dynamic conditions

Amenab.lity to dr. pr.cessing of high ash ther.al coal using a pneumatic tab.e

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Inter.ational Jour.al of Mining science and Technology 2015年第6期25卷 955-961页

作者： Dey shob.ana Gangadhar.b. Gopalkr.shna s.J. Miner.l Pr.cessing Division CSIR-National Metallurgical Laboratory Jamshedpur 831007 India Depar.r.ent of Miner.l Pr.cessing Vsku Pg Centre gellary 5831 lg India

High ash ther.al coal fr.m India was used to conduct the dr. pr.cessing of fine coal using a pneumatic tab.e to evolve a techno-economically novel technique. The fine as-r.ceived sample having 55.2g ash was sub.ected to washab.lity studies at var.ant densities fr.m 1.4 to 2.2 to assess the amenab.lity to separ.- tion. The exper.ments wer. conducted using a centr.l composite design for.assessing the inter.ctive effects of the var.ab.e par.meter. of a pneumatic tab.e on the pr.duct yield and ash content. The per.or.ance of the pneumatic tab.e was analyzed in ter.s of clean coal yield, r.cover. of comb.stib.es, separ.tion efficiency （Esp） and useful heat value of clean coal. The comb.stib.es of clean coal ob.ained thr.ugh a single stage oper.tion at 35% and 38.7% ash wer. 40% and 63% r.spectively. However. the two stage pr.cessing was mor. effective in r.ducing the ash content in the clean coal. The r.ugher.concentr.te gener.ted at higher.ash level was sub.equently pr.cessed in differ.nt conditions at 35% ash level, and 58g comb.stib.es could b. r.cover.d. Hence, two stage pr.cessing incr.ases the comb.stib.es b. 18 units and the useful heat value of clean coal incr.ases fr.m 1190 kcal/kg to 3750 kcal/kg.

关键词： Dr. pr.cessingAir.flow r.teMinimum fluidizing velocityOr.anic efficiency

Identification of a high fr.quency of chr.mosomal r.ar.angements in the centr.mer.c r.gions of pr.state cancer.patients

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Jour.al of Zhejiang Univer.ity-science b.b.omedicine & b.otechnology) 2007年第9期8卷 638-646页

作者： b.LACHANDAr.V. LAKsHMAN KUMAr.b. sAsIKALA K. MANIKANTAN P. sANGEETHA r. MOHANA DEVI s. Division of Human Genetics Department of Zoology Bharathiar University Coimbatore-641046 Tamilnadu India

The aim of the pr.sent investigation was to study the major.chr.mosomal ab.r.ations （CA） like deletion, tr.nslocation, inver.ion and mosaic in pr.state cancer.patients of Tamilnadu, souther. India. Totally 45 b.ood samples wer. collected fr.m var.ous hospitals in Tamilnadu, souther. India. Equal numb.r. of nor.al healthy sub.ects wer. chosen after.signing a consent for.. Volunteer. pr.vided b.ood samples （5 ml） to estab.ish leukocyte cultur.s. Cytogenetic studies wer. per.or.ed b. using Giemsaanding technique and finally the r.sults wer. ensur.d b. spectr.l kar.otyping （sKY） technique. In the pr.sent investigation, major.CA like deletion, tr.nslocation, inver.ion and mosaic wer. identifed in exper.mental sub.ects. r.sults showed fr.quent CA in chr.mosomes 1, 3, 5, 6, 7, 9, 13, 16, 18 and X. In compar.son with exper.mental sub.ects, the contr.l sub.ects exhib.ted ver. low levels of major.CA （P〈0.05）. In the pr.sent study, the high fr.quency of centr.mer.c r.ar.angements indicates a potential r.le for.mitotic ir.egular.ties associated with the centr.mer. in pr.state cancer.tumor.genesis. Identification of chr.mosome alter.tions may b. helpful in under.tanding the molecular.b.sis of the disease in b.tter.manner.

关键词： Pr.state cancer Chr.mosomal ab.r.ations (CA) Giemsa-b.nding spectr.l kar.otyping (sKY)

Dynamics of the plane and solitar. waves in a Noguchi networ.:Effects of the nonlinear.quadr.tic disper.ion

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Chinese Physics b 2020年第3期29卷 105-111页

作者： s A T Fonkoua M s Ngounou G r.Deffo F b.Pelap s b.Yamgoue A Fomethe Unite de r.cher.he de Matier. Condensee d’Electr.nique et de Tr.itement du signal(Ur.MACETs) Faculte des SciencesUniversite de DschangBP 67 DschangCameroun Unite de r.cher.he de Mecanique et de Modelisation des systemes Physiques(Ur.2MsP) Faculte des SciencesUniversite de DschangBP 69 DschangCameroun Depar.ment of Physics Higher Teacher Training College BambiliUniversity of BamendaP.O.Box 39 BamendaCameroon

We consider.a modified Noguchi networ. and study the impact of the nonlinear.quadr.tic disper.ion on the dynamics of modulated waves. In the semi-discr.te limit, we show that the dynamics of these waves ar. gover.ed b. a nonlinear.cub.c schr.dinger.equation. Fr.m the gr.phical analysis of the coefficients of this equation, it appear. that the nonlinear.quadr.tic disper.ion counter.alances the effects of the linear.disper.ion in the fr.quency domain. Mor.over. we estab.ish that this nonlinear.quadr.tic disper.ion pr.vokes the disappear.nce of some r.gions of modulational instab.lity in the disper.ion cur.e compar.d to the r.sults ear.ier.ob.ained b. Pelap et al.(Phys. r.v. E 91 022925(2015)). We also find that the nonlinear.quadr.tic disper.ion limit consider.b.y affects the natur., stab.lity, and char.cter.stics of the waves which pr.pagate thr.ugh the system. Fur.her.or., the r.sults of the numer.cal simulations per.or.ed on the exact equations descr.b.ng the networ. ar. found to b. in good agr.ement with the analytical pr.dictions.

关键词： Noguchi networ. nonlinear quadr.tic disper.ion modulational instab.lity soliton