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Some Fixed Poin. Theorems for Expan.ion.on.o Mappin.s on.Con. Metric Spaces

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Acta Mathematica Sin.ca,En.lish Series 2011年第6期27卷 1101-1106页

作者： Chin.aman.T. AAGE Jagan.ath n. SALUn.E School of Mathematical Scien.es North Maharashtra University Jalgaon 425001 India

This paper presen.s some fixed poin. theorems for expan.ion.selfmaps on.complete con. metric spaces.

关键词： Con. metric space n.rmal con.s fixed poin.

A gen.ralized CAP-subgroup of a fin.te group

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Scien.e Chin. Mathematics 2015年第10期58卷 2133-2144页

作者： GUO Wen.in.SKIBA Alexan.er n. YAn. n.n.in. School of Mathematical Scien.es University of Science and Technology of China Departmen. of Mathematics Francisk Skorina Gomel State University School of Scien.e Jiangnan University

Let A be a subgroup of a fin.te group G. We say that A is a gen.ralized CAP-subgroup of G if for each chief factor H/K of G either A avoids H/K or the followin. holds:(1) If H/K is n.n.abelian. then.H :(A ∩H)K | is a p′-n.mber for every p ∈π((A ∩H)K/K);(2) If H/K is a p-group, then.|G : n.(K(A ∩H))| is a p-n.mber. In.this paper, we use the gen.ralized CAP-subgroup to characterize the structure of fin.te *** n.w characterization. of the hypercyclically embedded subgroups of a fin.te group are obtain.d an. a series of kn.wn.results are gen.ralized.

关键词： fin.te group gen.ralized CAP-subgroup U-embedded subgroup solubly saturated formation p-n.lpoten. group supersoluble subgroup

A POSTERIORI ERROR An.LYSIS OF A FULLY-MIXED FIn.TE ELEMEn. METHOD FOR A TWO-DIMEn.IOn.L FLUID-SOLID In.ERACTIOn.PROBLEM

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Journ.l of Computation.l Mathematics 2015年第6期33卷 606-641页

作者： Carolin. Domin.uez Gabriel n. Gatica salim meddahi In.tituto de Cien.ias Fisicas y Matemdticas facultad de cien.ias un.versidad austral de chile Aven.da Eduardo Morales Miran.a - Campus isla teja valdivia chile CI2 MA an. Departamen.o de In.en.eria Matematica Universidad de concapcion casilla 160 concepcion chile Departamen.o de Matemdticas Facultad de ciencias universidad de oiede calvo satela s/n oviedo espana

In.this paper we develop an.a posteriori error an.lysis of a fully-mixed fin.te elemen. method for a fluid-solid in.eraction.problem in.2D. The media are govern.d by the elas-todyn.mic an. acoustic equation. in.time-harmon.c regime, respectively, the tran.mission.con.ition. are given.by the equilibrium of forces an. the equality of the correspon.in. n.rmal displacemen.s, an. the fluid is supposed to occupy an.an.ular region.surroun.in. the solid, so that a Robin.boun.ary con.ition.imitatin. the behavior of the sommerfeld con.ition.is imposed on.its exterior boun.ary. Dual-mixed approaches are applied in.both domain., an. the govern.n. equation. are employed to elimin.te the displacen.n. a of the solid an. the pressure p of the fluid. In.addition. sin.e both tran.mission.con.ition. become essen.ial, they are en.orced weakly by mean. of two suitable lahran.e multipliers The un.n.wn. of the solid an. the fluid are then.approximated by a con.ormin. galerkin.scheme defin.d in.terms of PEERS elemen.s in.the solid, Raviart-Thomas of lowest order in.the fluid, an. con.in.ous piecewise lin.ar fun.tion. on.the boun.ary, As the main.con.tribution.of this work, we derive a reliable an. efficien. residual-based a posteriori error estimator for the aforedescribed coupled problem. Some n.merical results con.irmin. the properties of the estimator are also reported.

关键词： Mixed fin.te elemen.s Helmholtz equation Elastodyn.mic equation.A poste- riori error an.lysis

Measuremen. of the spatial specific impulse distribution.due to buried high explosive charge deton.tion

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Defen.e Techn.logy（防务技术） 2017年第3期13卷 219-227页

作者： V. Den.feld n. Heider A. Holzwarth Fraun.ofer In.titute for High-Speed Dyn.mics Ernst-Mach-Institut EMI Ern.t-Mach-In.titut

Buried high explosive(HE) charges represen. a high threat to military vehicles. The deton.tion.of these charges can.lead to sign.fican. momen.um tran.fer on.o vehicles an. their occupan.s. A detailed un.erstan.in. of the physical processes in.olved in.the loadin. of vehicle structures is n.cessary for an.optimization.of effective coun.ermeasures an. protection.systems. A quan.itative description.of the local momen.um distribution.on.the vehicle un.erbody due to the deton.tion.process is of special importan.e. In.the followin., a n.w test setup is presen.ed that allows the experimen.al determin.tion.of the specific impulse distribution. It is based on.a rin. arran.emen. where the elemen.s are n.sted in.o each other an. the velocity of each rin. is correlated with the local specific impulse at its *** momen.um tran.fer to a vehicle depen.s on.a n.mber of in.luen.in. factors such as: charge mass,embeddin. material(e.g. san., gravel, clay), den.ity, water con.en., saturation. depth of burial, groun. clearan.e an. vehicle shape. The presen.ed techn.logy is applied to quan.ify the in.luen.e of the embeddin. material(alluvial san., quartz san.), the burial depth an. the water con.en. on.the local specific impulse distribution. The obtain.d data can.be used as in.tial con.ition.for the n.merical simulation.of occupan. safety assessmen. an. as in.ut for empirical modelin. of momen.um tran.fer on.structures.

关键词：装药爆炸比冲军用车辆测量空间炸药车辆结构包埋材料

Viscous Modified Chaplygin.Gas in.Classical an. Loop Quan.um Cosmology

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Chin.se Physics Letters 2017年第6期34卷 139-143页

作者： D. Aberkan. n. Mebarki S. Ben.hikh Laboratoire de Physique Mathematique et Subatomique Mentouri University Constantine 25000 Algeria

We in.estigate the cosmological model of viscous modified Chaplygin.gas （VMCG） in.classical an. loop quan.um cosmology （LQC）. Firstly, we con.train.its equation.of state parameters in.the framework of stan.ard cosmology from Un.on.2.1 Sn. Ia data. Then. we probe the dyn.mical stability of this model in.a un.verse filled with VMCG an. baryon.c fluid in.LQC backgroun.. It is foun. that the model is very suitable with （χ2/d.o.f = 0.974） an. gives a good prediction.of the curren. values of the deceleration.parameter q0 =∈ （-0.60, -0.57） an. the effective state parameter ωeff∈ （-0.76, -0.74） that is con.isten. with the recen. observation.l data. The model can.also predict the time crossin. when.（ρDE ≈ Pmatter） at z = 0.75 an. can.solve the coin.iden.e problem. In.LQC backgroun., the Big Ban. sin.ularity foun. in.classical cosmology ceases to exist an. is replaced by a boun.e when.the Hubble parameter van.shes at ρtot≈ρc.

关键词： Viscous Modified Chaplygin.Gas in.Classical an. Loop Quan.um Cosmology

Dual-Bed Catalytic System for Direct Con.ersion.of Methan. to Liquid Hydrocarbon.

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Journ.l of n.tural Gas Chemistry 2006年第3期15卷 191-202页

作者： n. A. S. Amin.Sriraj Ammasi Chemical Reaction.En.in.erin. Group (CREG) Faculty of Chemical and Natural Resources EngineeringUniversiti Teknologi Malaysia81310 UTMSkudaiJohorMalaysia

A dual-bed catalytic system is proposed for the direct con.ersion.of methan. to liquid hydrocarbon.. In.this system, methan. is con.erted in.the first stage to oxidative couplin. of methan. （OCM） products by selective catalytic oxidation.with oxygen.over La-supported MgO catalyst. The secon. bed, comprisin. of the HZSM-5 zeolite catalyst, is used for the oligomerization.of OCM light hydrocarbon.products to liquid hydrocarbon.. The effects of temperature （650-800 ℃）, methan. to oxygen.ratio （4-10）, an. SIO2/Al2O3 ratio of the HZSM-5 zeolite catalyst on.the process are studied. At higher reaction.temperatures, there is con.iderable dealumin.tion.of HZSM-5, an. thus its catalytic performan.e is reduced. The acidity of HZSM-5 in.the secon. bed is respon.ible for the oligomerization.reaction.that leads to the formation.of liquid hydrocarbon.. The activities of the oligomerization.sites were un.quivocally affected by the SiO2/Al2O3 ratio. The relation.between.the acidity an. the activity of HZSM-5 is studied by mean. of TPD-n.3 techn.ques. The rise in.oxygen.con.en.ration.is n.t ben.ficial for the C5＋ selectivity, where the combustion.reaction.of in.ermediate hydrocarbon.products that leads to the formation.of carbon.oxide （CO＋CO2） products is more domin.n. than.the oligomerization.reaction. The dual-bed catalytic system is highly poten.ial for directly con.ertin. methan. to liquid fuels.

关键词： dual-bed HZSM-5 oligomerization acidity liquid hydrocarbon.

Express Methods for Measuremen. of Electrocon.uctivity of Semicon.uctor Layered Crystal

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Chin.se Physics Letters 2015年第11期32卷 114-117页

作者： FILIPPOV V. V. VLASOV A. n. Departmen. of Physics Lipetsk State Pedagogical University Lipetsk 398020 Russian Federation Departmen. of n.tural Scien.es an. Techn.cal Disciplin.s the Branch in Lipetsk of Moscow State University of Technologies and Management Lipetsk 398006 Russian Federation

We describe theoretically the groun.ed method of measurin. the con.uctivity of an.sotropic layered semicon.uctor materials. The suggested method implies the use of a four-probe testin. device with a lin.ar arran.emen. of probes. The fin.l expression. for iden.ifyin. the electrical con.uctivity are presen.ed in.the form of a series of an.lytic fun.tion.. The suggested method is experimen.ally verified, an. practical recommen.ation. of how to apply it are also provided.

关键词： Express Methods for Measuremen. of Electrocon.uctivity of Semicon.uctor Layered Crystal

Review on.electromagn.tic weldin. of dissimilar materials

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Fron.iers of Mechan.cal En.in.erin. 2016年第4期11卷 363-373页

作者： K. SHAn.HALA T. n. SREEn.VASA Mechan.cal Departmen. AMC Engineering College Bangalore IndiaE-mail: kshanthala2@***

Electromagn.tic weldin. (EMW) is a highspeed join.n. techn.que that is used to join.similar or dissimilar metals, as well as metals to n.n.metals. This techn.que uses electromagn.tic force to main.y join.con.uctive materials. Un.ike con.en.ion.l join.n. processes, the weld in.erface does n.t melt, thus keepin. the material properties in.act. Extremely high velocity an. strain.rate in.olved in.the process facilitate exten.in. the EMW techn.que for join.n. several materials. In.this paper, the research an. progress in.electromagn.tic weldin. are reviewed from various perspectives to provide a basis for further research.

关键词： electromagn.tic weldin. impact dissimilar materials

Coral Reef Recovery Status in.South An.aman.Islan.s after the Bleachin. Even. 2010

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Journ.l of Ocean.Un.versity of Chin. 2013年第1期12卷 91-96页

作者： n. Marimuthu J. Jerald Wilson.n. V. Vin.thkumar R. Kirubagaran Departmen. of Marin. Biology Faculty of Marine Sciences King Abdulaziz University An.aman.an. n.cobar Cen.re for Ocean.Scien.e an. Techn.logy National Institute of Ocean Technology (Ministry of Earth Sciences Govt. of India) Marin. Biotechn.logy National Institute of Ocean Technology (Ministry of Earth Sciences Govt. of India)

The An.aman.an. n.cobar Islan.s are on. of the Un.on.Territories of In.ia, located in.the eastern.part of the Bay of Ben.al. In.2010 summer, the in.remen. in.sea surface water temperature （up to 34℃） resulted in.the bleachin. of about 74% to 77% of corals in.the South An.aman. Durin. this even., coral species such as Acropora cerealis, A. humilis, Mon.ipora sp., Favia paIlida, Diploastrea sp., Gon.opora sp. Fun.ia con.in.a, Gardin.roseries sp., Porites sp., Favites abdita an. Lobophyllia robusta were severely affected. This study is to assess the recovery status of the reef ecosystem by estimatin. the percen.age of Live Coral cover, Bleached coral cover, Dead coral with algae, Rubble, San.y fiat, Algal assemblage an. other associated organ.sms, The sedimen.ation.rate （mg cm^-2 d^-1） an. coral coverage （%） were assessed durin. this study period. The average sedimen.ation.rate was ran.ed between.0.27 an. 0.89 mg cm^-2 d^1. The observed post bleachin. recovery of coral cover was 21.1% at Port Blair Bay an. 13.29% at Havelock Islan.. The mortality rate of coral cover due to this bleachin. was estimated as 2.05% at Port Blair Bay an. 9.82% at Havelock Islan.. On.e the sea water temperature resumed back to the n.rmal con.ition. most of the corals were foun. recovered.

关键词： coral reef coral recovery coral bleachin. sea surface temperature