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Experimenta. investiga.ion on the s.ability of bride girder a.a.nst tsuna.i forces

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science China.Technologica. sciences) 2014年第10期57卷 2028-2036页

作者： Ra.Ma. sa.ia.a.IB s.atira. sHIRa.I s M Depa.tment of Civil Engineering Faculty of Engineering University of Malaya Institute of Environmenta. a.d Wa.er Resources Ma.a.ement (IPa.a. Faculty of EngineeringUniversiti Teknologi Malaysia

Bridges.are the most useful pa.t in the tra.sporta.ion *** disruption of the bridge structures ma. ha.per the whole tra.sporta.ion *** the la.t recent tsuna.is,numerous number of bridges were structura.ly da.a.ed by the tsuna.i *** of proper provisions of tsuna.i forces in the design guidelines.also contributes to the a.gmenta.ions of the da.a.e ***,proper eva.ua.ion of the tsuna.i forces on the bridge girder should be introduced in the design *** this study,la.ora.ory experiments were ca.ried out to revea. the da.a.e mecha.ism of the bridge girder by a.sessing the exerted tsuna.i *** broken a.d unbroken wa.es were considered for the *** results showed tha. mea.ured forces were la.ger for broken wa.es tha. those of unbroken *** force of the broken wa.es wa. 4.59 times.as la.ge a. the hydros.atic ***,wa.es rea.hed the pea. va.ue more ra.idly for la.ger wa.e heights tha. those of s.aller ***,a.girder tha. is pla.ed a. a.higher position is much vulnera.le to tsuna.i ha.a.d.

关键词： bridge force girder tsuna.i wa.e forms wa.e height

a. optimized ion tra. geometry to mea.ure qua.rupole shifts of ^(171)Yb~＋ clocks

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Chinese Physics B 2016年第11期25卷 230-237页

作者： N Ba.ra.B K sa.oo s De a.a.emy of scientific a.d Innova.ive Res.arch CSIR-NPL Campus New Delhi India CsIR-Na.iona. Physica. La.ora.ory Dr. K. S. Krishnan Marg New Delhi 110012 India Theoretica. Physics Division Physical Research Laboratory Navrangpura Ahmedabad 380009 India

We propose a.new ion-tra. geometry to ca.ry out a.cura.e mea.urements of the qua.rupole shifts in the （171）Yb *** tra. will minimize the qua.rupole shift due to the ha.monic component of the confining potentia. by a. order of *** will be useful to reduce the uncerta.nties in the clock frequency mea.urements of the 6s 2s（1/2）→4f（13）6s2 2F（7/2）a.d 6s 2s（1/2）→5d2D（3/2） tra.sitions,from which we ca. deduce the precise va.ues of the qua.rupole moments（0s） of the 4f（13）6s2 2F（7/2） a.d 5d2D（3/2） ***,it ma. be a.le to a.firm the va.idity of the mea.ured 0 va.ue of the4f（13）6s22F（7/2） s.ate,for which three independent theoretica. studies defer a.most by one order of ma.nitude from the *** a.so ca.cula.e 0s using the rela.ivistic coupled-cluster（RCC） *** use these 0 va.ues to estima.e the qua.rupole shift tha. ca. be mea.ured in our proposed ion tra. experiment.

关键词： va.idity minimize ca.ry clock rela.ivistic precise deduce ma.nitude expecta.ion s.atia.ly

C_c(X)s.aces with X Loca.ly Compa.t

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a.ta.Ma.hema.ica.sinica.English series 2007年第9期23卷 1593-1600页

作者： J.C.FERRa.DO s.MOLL Centro de Investiga.ión Opera.iva Universidad Miquel Hernández Depa.ta.ento de Ma.emática.a.lica.a Universidad Politécnica

In this pa.er, we show, a.ong other results, tha. if X is.a [sepa.a.le] loca.ly compa.t s.ace X [sa.isfying the first counta.ility a.iom] then the s.ace Cc （X） ha. counta.le tightness [if a.d only if it ha. bounding tightness] if a.d only if it is Frechet-Urysohn, if a.d only if Cc （X） conta.ns.a dense （LM） subs.ace a.d if a.d only if X is.a-compa.t.

关键词： Frechet-Urysohn s.ace counta.le [bounding] tightness (LM)-s.ace

FINITE DIFFERENCE METHODs FOR THE HEa. EQUa.ION WITH a.NONLOCa. BOUNDa.Y CONDITION

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Journa. of Computa.iona. Ma.hema.ics 2015年第1期33卷 17-32页

作者： V. Thomee a.s. Va.udeva.Murthy Ma.hema.ica. sciences Chalmers University of Technology and University of Gothenburg SE-412 96 GSteborg Sweden TIFR Centre for a.pl. Ma.h Yelahanka New Town Bangalore India

We consider the numerica. solution by finite difference methods of the hea. equa.ion in one s.ace dimension, with a.nonloca. integra. bounda.y condition, resulting from the trunca.ion to a.finite interva. of the problem on a.semi-infinite interva.. We first a.a.yze the forwa.d Euler method, a.d then the 0-method for 0 〈 θ ≤ 1, in both ca.es in ma.imum-norm, showing O（h2 ＋ k） error bounds, where h is the mesh-width a.d k the time step. We then give a. a.terna.ive a.a.ysis for the ca.e θ= 1/2, the Cra.k-Nicolson method, using energy a.guments, yielding a.O（h2 ＋ k3/2） error bound. specia. a.tention is given the a.proxima.ion of the bounda.y integra. opera.or. Our results.are illustra.ed by numerica. exa.ples.

关键词： Hea. equa.ion a.tificia. bounda.y conditions unbounded doma.ns productqua.ra.ure.

The Ma.hema.ica. a.a.ysis for Peris.altic Flow of Hyperbolic Ta.gent Fluid in a.Curved Cha.nel

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Communica.ions in Theoretica. Physics 2013年第6期59卷 729-736页

作者： s.Na.eem E.N.Ma.a. Depa.tment of Ma.hema.ics Quaid-i-Azam University

In the present pa.er, we ha.e investiga.ed the peris.altic flow of hyperbolic ta.gent fluid in a.curved cha.nel. The governing equa.ions of hyperbolic ta.gent fluid model for curved cha.nel a.e derived including the effects of curva.ure. The highly nonlinea. pa.tia. differentia. equa.ions.are simplified by using the wa.e fra.e tra.sforma.ion,long wa.e length a.d low Reynolds number a.sumptions. The reduced nonlinea. pa.tia. differentia. equa.ion is solved a.a.ytica.ly with the help of homotopy perturba.ion method (HPM). The physica. fea.ures of pertinent pa.a.eters ha.e been discussed by plotting the gra.hs of pressure rise a.d strea. functions.

关键词： ta.gent hyperbolic fluid curved cha.nel peris.altic flow HPM

a.study of the Number of Roots of xk =g in a.Finite Group via.Its Frobenius-schur Indica.ors

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a.gebra.Colloquium 2017年第1期24卷 93-108页

作者： s.K. Pra.a.a.i R. sa.ma Depa.tment of Ma.hema.ics Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 India

Let G be a.finite group. For k ∈ N, X ∈ Irr（G）, define c（k）x ：= 1/G ∑g∈G x（gk）. This is ca.led the k-th Frobenius-schur indica.or of X. In this.article we study the Probenius-schur indica.ors for Frobenius groups, p-groups, semidihedra. groups.and mod- ula. p-groups. Further, we use this to study the function ζ kG（g） which counts the number of roots of xk = g in a.finite group G.

关键词： Frobenius-schur indica.ors p-groups group cha.a.ters

Nea.-surfa.e Correction on seismic a.d Gra.ity Da.a

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Journa. of Ea.th science 2015年第6期26卷 851-857页

作者： s.Bychkov I.Y.Mityunina Perm s.ate University Mining Institute of Ural Branch of Russian Academy of Sciences

It is importa.t a.d urgent to work out better s.atics correction methods to fa.ilita.e seismic prospecting. This pa.er presents.a new method of s.atics correction ca.cula.ion ba.ed on development of a.seismic-gra.ity model of the nea. surfa.e. Gra.ity interpreta.ion includes determina.ion of the loca. component ca.sed by the nea. surfa.e effects.and ca.cula.ion of the nea.-surfa.e rock density by solving the linea. inverse gra.ity problem. To obta.n the nea.-surfa.e velocities, priori seismic da.a.such a. time fields of the first wa.es recorded in the initia. pa.t of common depth point（CDP） seismogra.s.are used. a. optima. nea.-surfa.e model is retrieved on the ba.is of the successive solution of the inverse a.d forwa.d seismic problems, correla.ing with the observed seismic da.a. Ma.ching of seismic a.d gra.ity model of the nea. surfa.e yields the ma.imum coefficient of correla.ion between the va.ues of velocities.and densities. a. the end of the intera.tive itera.ive process we get va.ues of the nea.-surfa.e seismic wa.e velocities, used for s.atics eva.ua.ion, a.d va.ues of gra.ity a.oma.ies, ca.cula.ed with a.va.ia.le density of the interbedded la.er. The a.plica.ions of the proposed method a. geophysica. explora.ion of oil a.d ga. confirm the possibility of ca.cula.ion of s.atics correction using the gra.imetric da.a.by constructing a.coherent seismic-gra.ity model of the nea. surfa.e.

关键词： gra.ity nea.-surfa.e velocity seismic-gra.ity model s.atics correction.

Improvement in Mecha.ica. Properties of Microa.loyed steel 30MsV6 by a.Precipita.ion Ha.dening Process

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Journa. of Iron a.d steel Res.arch Interna.iona. 2013年第5期20卷 66-73页

作者： M Ha.isa.a.i s Na.egh H Yoozba.hiza.eh a.Ekra.i Depa.tment of Ma.eria.s Engineering Science and Research Branch Islamic Azad University Depa.tment of Ma.eria.s science a.d Engineering Sharif University of Technology

The microstructura. evolutions.and mecha.ica. properties of va.a.ium microa.loyed steel （30MsV6） during precipita.ion ha.dening were studied. The effects of a.ing tempera.ure a.d cooling ra.e on mecha.ica. strength （yield strength a.d ultima.e tensile strength） were simila.. Increa.ing a.ing tempera.ure or cooling ra.e firstly increa.ed the mecha.ica. strength of specimens up to their ma.imum va.ues, which then decrea.ed with further increa.e in a.ing tempera.ure or cooling ra.e. Microstructura. evolutions revea.ed tha. cooling ra.e ha. significa.t effects on the pea.lite interla.ella. s.acing a.d size of pre-eutectoid ferrite. Unlike the effect of a.stenitizing tempera.ure, the pea.lite interla.ella. s.acing a.d pre-eutectoid ferrite size were decrea.ed by increa.ing the cooling ra.e from a.stenitizing tempera.ure. a.cording to the microstructura. evolutions.and mecha.ica. properties, the optima. hea. trea.ment process of microa.loyed steel 30MsV6 wa.0}ustenitizing a. 950 ℃ for 1 h, a.r cooling （3.8 ℃/s） a.d a.ing a. 600 ℃ for 1.5 h. This optima. hea. trea.ment process resulted in a.good combina.ion of elonga.ion a.d yield strength.

关键词： microa.loyed steel microstructure precipita.ion strength

a.a.ytica. Hopf Bifurca.ion a.d s.ability a.a.ysis of T system

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Communica.ions in Theoretica. Physics 2011年第4期55卷 609-616页

作者： Robert a.Va.Gorder s.Roy Choudhury Depa.tment of Ma.hema.ics University of Centra. Florida

Complex dyna.ics.are studied in the T system, a.three-dimensiona. a.tonomous nonlinea. system. In pa.ticula., we perform a. extended Hopf bifurca.ion a.a.ysis of the system. The periodic orbit immedia.ely following the Hopf bifurca.ion is constructed a.a.ytica.ly for the T system using the method of multiple s.ales, a.d the s.ability of such orbits is.ana.yzed. such a.a.ytica. results complement the numerica. results present in the litera.ure. The a.a.ytica. results in the post-bifurca.ion regime a.e verified a.d extended via.numerica. simula.ions, a. well a. by the use of s.anda.d power spectra. a.tocorrela.ion functions, a.d fra.ta. dimensions dia.nostics. We find tha. the T system exhibits interesting beha.iors in ma.y pa.a.eter regimes.

关键词： extended Hopf bifurca.ion a.a.ysis method of multiple s.ales T system s.ability a.a.ysis