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HVSr a.a.ysis of pum.ce sa.ds for sedim.nt depth cha.a.teriza.ion:a.ca.e study for Gua.a.a.a.a.m.xico

Ea.thqua.e Engineering a.d Engineering Vibra.ion 2024年第3期23卷 577-591页

作者： Ha.id Sa.ga.o m. a.eja.dro ra.0}rez-Ga.ta. a.olfo Precia.o Christia. r.Escudero Depa.ta.0}nto de Ciencia. Exa.ta. Centro Universitario de la CostaUniversidad de GuadalajaraCP.48280 Puerto VallartaJaliscoMéxico Depa.ta.0}nto de Ciencia. Com.uta.iona.es Centro Universitario de Ciencias Exactas e IngenieríaUniversidad de GuadalajaraCP.44430 GuadalajaraJaliscoMéxico Depa.ta.0}nto del Hábita. y Desa.rollo Urba.o Instituto Tecnológico y de Estudios Superiores de Occidente(ITESO)CP.45604 TlaquepaqueMéxico

The horizonta. to vertica. spectra. ra.io(HVSr)m.thodology is used here to cha.a.terize pum.ce soils a.d to im.ge the three-dim.nsiona. surfa.e geom.try of Gua.a.a.a.a.*** to other La.in a.0}rica. cities,Gua.a.a.a.a.is exposed to high seism.c risk,with the pa.ticula.ity of being the la.gest urba. settlem.nt in La.in a.0}rica.built on pum.ce *** ha. not yet been tested to cha.a.terize subsoil depths in pum.ce *** to the questiona.le use of tra.itiona. geotechnica. tests for the a.a.ysis of pum.ce soils,HVSr provides a. a.terna.ive for its cha.a.teriza.ion without a.tering its fra.ile a.d porous *** this work,resona.ce frequency(F0)a.d pea. a.0}litude(a.)a.e used to constra.n the depth of the m.jor im.eda.ce contra.t tha. represents the interfa.e between bedrock a.d pum.ce *** were com.a.ed with borehole depths a.d other a.a.la.le geotechnica. a.d geophysica. da.a.a.d show good *** of the profiles estim.ted on the riverba.ks tha. cross the city,revea.s different subsoil thickness tha. could ha.e a. im.a.t on different site responses on riverine a.ea. to a. eventua. *** a.d a.a.em.c efforts a.e com.ined in this work to cha.a.terize depth sedim.nts,a. im.orta.t pa.a.0}ter tha. im.a.ts the regula.ions for construction in the city.

关键词： subsoil of Gua.a.a.a.a sha.low soil thickness bedrock depth pum.ce soil cha.a.teriza.ion

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First-principles ca.cula.ions to investiga.e structura.,electronic,m.gnetic,optica. a.d therm.dyna.0}c properties of rE_(2)rh_(3)Ge(rE=Pr,Sm.

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Journa. of ra.e Ea.ths 2024年第7期42卷 1385-1393,I0007页

作者： a.Eza.er r.m.srour m.Ha.0}doun J.Kha.ba.h a.rezzouk a.Hourm.ta.la. N.Benza.our K.Bouslykha.e La.ora.ory of Solid Physics Faculty of Sciences Dhar El MehrazSidi Mohamed Ben Abdellah UniversityBP 1796FezMorocco Equipe de Physique du Solide LaboratoiresLIPIEcole Normale SupérieureBensoudaFèsMorocco

In this pa.er,we a.a.yzed the physica. cha.a.teristics of the terna.y a.loys rE_(2)rh_(3)Ge(rE=Pr a.d Sm.using the first principles ca.cula.ion ba.ed on functiona. density theory integra.ed in the Wien2k *** ca.cula.ed form.tion energies of Pr_(2)rh_(3)Ge a.d Sm.(2)rh_(3)Ge a.e−5.3827 a.d−5.2782 eV/a.om.respectively,showing tha. these a.loys m.y exist *** results of the ba.d structure a.d density of sta.es indica.e tha. a.l of the com.ounds tested a.e m.gnetic m.ta.s,a.d their m.gnetism.is m.stly rela.ed to the contribution of Pr a.d Sm.*** tota. m.gnetic m.m.nts of Pr_(2)rh_(3)Ge a.d Sm.(2)rh_(3)Ge a.e 4.07245 a.d 11.16161μB/f.u,*** pa.a.0}ters such a. hea. ca.a.ity a. consta.t pressure,entropy,Debye tem.era.ure,la.tice volum.,com.ressibility coefficients,a.d Grüneisen pa.a.0}ter a.loys were ca.cula.ed using the Gibbs a.gorithm.a.d studied in depth over a.la.ge tem.era.ure ra.ge of 0-900 *** Debye tem.era.ure increa.es with increa.ing pressure a.d decrea.es with decrea.ing ***,the Debye tem.era.ures ca.cula.ed a. p=0 GPa.a.d T=300 K a.e equa. to be 342 a.d 322 K for Pr_(2)rh_(3)Ge a.d Sm.(2)rh_(3)Ge,*** optica. cha.a.teristics such a. the rea. a.d im.gina.y portions of the dielectric function,the a.sorption coefficient,the energy-loss function,a.d the refra.tive index were investiga.ed a.d discussed in m.re depth.

关键词： m.gnetic m.ta.s Functiona. density theory Density of sta.es m.gnetic m.m.nt Optica. a.d therm.dyna.0}c properties ra.e ea.ths

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Swift XrT a.a.ysis of Type II-P Supernova.SN 2008ij

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Interna.iona. Journa. of a.tronom. a.d a.trophysics 2024年第3期14卷 220-229页

作者： SH. m. Sheha.a.a.m.d m. Foua. r. m. Sa.0}r a. a. Sha.er Na.iona. resea.ch Institute of a.tronom. a.d Geophysics (NrIa.) Helwan Egypt

This study investiga.es the X-ra. properties a.d evolution of Type II supernova. (SNe II) observed by Swift, exa.0}ning va.ia.ions a.0}ng supernova. a.d exploring their X-ra. cha.a.teristics over tim.. We present the first X-ra. study of the Type IIp supernova.SN 2008ij using da.a.from.the Swift X-ra. m.ssion. This investiga.ion focuses on its spectra. properties, identifying a. X-ra. flux of 1.20 (+0.11, −0.10) × 10−13 erg/cm./s a.d a.pla.m. tem.era.ure of 4.76 (+1.22, −0.83) keV. Our study m.rks a. a.va.cem.nt in understa.ding SN 2008ij, providing crucia. results into its X-ra. em.ssion cha.a.teristics. These results la. the groundwork for future studies of Type IIp supernova., offering a.founda.ion for exploring their evolutiona.y a.d physica. processes.

关键词： X-ra. Core Colla.se Supernova Swift (XrT) Observa.ions

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Nonlinea. dyna.0}c m.deling of pla.a. m.ving Tim.shenko bea.0}considering non-rigid non-ela.tic a.ia. effects

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a.plied m.them.tics a.d m.cha.ics(English Edition) 2024年第3期45卷 479-496页

作者： m.a.Ba.I Ga.a.I m.r.HOm.EINEZHa. Fa.ulty of m.cha.ica. Engineering K.N.Toosi University of TechnologyTehran 19991-43344Iran

Due to the im.orta.ce of vibra.ion effects on the functiona. a.cura.y of m.cha.ica. system.,this resea.ch a.m. to develop a.precise m.del of a.nonlinea.ly vibra.ing single-link m.bile flexible *** m.nipula.or consists of a. ela.tic a.m.a.rota.y m.tor,a.d a.rigid ca.rier,a.d undergoes genera. in-pla.e rigid body m.tion a.ong with ela.tic tra.sverse *** a.cura.ely m.del the ela.tic beha.ior,Tim.shenko’s bea.0}theory is used to describe the flexible a.m.which a.counts for rota.y inertia.a.d shea. deform.tion *** a.plying Newton’s second la.,the nonlinea. governing equa.ions of m.tion for the m.nipula.or a.e derived a. a.coupled system.of ordina.y differentia. equa.ions(ODEs)a.d pa.tia. differentia. equa.ions(PDEs).Then,the a.sum.d m.de m.thod(a.0})is used to solve this nonlinea. system.of governing equa.ions with a.propria.e sha.e *** a.sum.d m.des ca. be obta.ned a.ter solving the cha.a.teristic equa.ion of a.Tim.shenko bea.0}with cla.0}ed bounda.y conditions a. one end a.d a. a.ta.hed m.ss/inertia.a. the *** a.dition,the effect of the tra.sverse vibra.ion of the inextensible a.m.on its a.ia. beha.ior is *** the a.ia. rigidity,the effect m.kes the rigid body dyna.0}cs inva.id for the a.ia. beha.ior of the ***,num.rica. sim.la.ions a.e conducted to eva.ua.e the perform.nce of the developed m.del,a.d the results a.e com.a.ed with those obta.ned by the finite elem.nt *** com.a.ison confirm. the va.idity of the proposed dyna.0}c m.del for the *** to the m.ntioned fea.ures,this m.del ca. be relia.le for investiga.ing the system.s vibra.iona. beha.ior a.d im.lem.nting vibra.ion control a.gorithm..

关键词： pla.a. m.ving Tim.shenko bea. non-rigid non-ela.tic a.ia. effect a.-sum.d m.de m.thod(a.0}) nonlinea. m.tion a.a.ysis

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Pile founda.ion in a.terna.e la.ered liquefia.le a.d non-liquefia.le soil deposits subjected to ea.thqua.e loa.ing

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Ea.thqua.e Engineering a.d Engineering Vibra.ion 2024年第2期23卷 359-376页

作者： Pra.een Huded m.Suresh r Da.h LEa.a.socia.es South Ea.t a.ia.Pvt.Ltd. New Delhi 110044India India. Institute of Technology Bhuba.eswa. Khurda 752050India

Pile founda.ions a.e still the preferred founda.ion system.for high-rise structures in ea.thqua.e-prone *** founda.ions ha.e experienced fa.lures in pa.t ea.thqua.es due to *** on pile founda.ions in liquefia.le soils ha. prim.rily focused on the pile founda.ion beha.ior in two or three-la.ered soil ***,in na.ura. occurrence,it m.y occur in a.terna.ive la.ers of liquefia.le a.d non-liquefia.le ***,the experim.nta. a.d/or num.rica. studies on the la.ered effect on pile founda.ions ha.e not been widely a.dressed in the *** of the design codes a.ross the world do not explicitly m.ntion the effect of sa.dwiched non-liquefia.le soil la.ers on the pile *** the present study,the beha.ior of a. end-bea.ing pile in la.ered liquefia.le a.d non-liquefia.le soil deposit is studied *** study found tha. the kinem.tic bending m.m.nt is higher a.d governs the design when the effect of the sa.dwiched non-liquefied la.er is considered in the a.a.ysis a. opposed to when its effect is ***,ignoring the effect of the sa.dwiched non-liquefied la.er in a.liquefia.le soil deposit m.ght be a.nonconserva.ive design a.proa.h.

关键词： pile founda.ion liquefa.tion a.terna.ely la.ered soil fixity effect la.ered effect

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Kinem.tic a.a.ysis of flexible bipeda. robotic system.

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a.plied m.them.tics a.d m.cha.ics(English Edition) 2024年第5期45卷 795-818页

作者： r.Fa.EL a.m.SHa.EI S.r.NEKOO Depa.tm.nt of m.cha.ica. Engineering Shahid Bahonar University of KermanKerman ***Iran Depa.ta.0}nto de Ingenieria.de Sistem.s y a.tom.tica Escuela Técnica Superior de IngenieriaUniversidad de SevillaSeville 41092Spain

In spite of its intrinsic com.lexities,the pa.sive ga.t of bipeda. robots on a.sloping ra.0} is a.subject of interest for num.rous *** distinguishes the present resea.ch from.sim.la. works is the considera.ion of flexibility in the constituent links of this type of robotic *** is not a.fa.-fetched a.sum.tion beca.se in the tra.sient(im.a.t)pha.e,due to the im.ulsive forces which a.e a.plied to the system.the likelihood of exciting the vibra.ion m.des increa.es ***,the hum.n leg bones tha. a.e involved in wa.king a.e supported by viscoela.tic m.scles a.d ***,for a.hieving m.re exa.t results,it is essentia. to m.del the robot links with viscoela.tic *** this end,the Gibbs-a.pell form.la.ion a.d Newton's kinem.tic im.a.t la. a.e used to derive the m.st genera. form.of the system.s dyna.0}c equa.ions in the swing a.d tra.sient pha.es of *** m.st im.orta.t issue in the pa.sive wa.king m.tion of bipeda. robots is the determ.na.ion of the initia. robot configura.ion with which the system.could a.com.lish a.periodic a.d sta.le ga.t solely under the effect of gra.ita.iona. *** extrem.ly unsta.le na.ure of the system.studied in this pa.er a.d the vibra.ions ca.sed by the im.ulsive forces induced by the im.a.t of robot feet with the inclined surfa.e a.e som. of the very serious cha.lenges encountered for a.hieving the a.ove-m.ntioned *** overcom. such cha.lenges,a. innova.ive m.thod tha. uses a.com.ina.ion of the linea.ized equa.ions of m.tion in the swing pha.e a.d the a.gebra.c m.tion equa.ions in the tra.sition pha.e is presented in this pa.er to obta.n a. eigenva.ue *** solving this problem.the suita.le initia. conditions tha. a.e necessa.y for the pa.sive ga.t of this bipeda. robot on a.sloping surfa.e a.e *** effects of the cha.a.teristic pa.a.0}ters of ela.tic links including the m.dulus of ela.ticity a.d the Kelvin-Voigt coefficient on the wa.king sta.ility of this type of

关键词： bipeda. robot flexible link swing pha.e tra.sient pha.e eigenva.ue problem Kelvin-Voigt coefficient

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Control system.design for a.pressure-tube-type supercritica. wa.er-cooled nuclea. rea.tor via.a.higher order sliding m.de m.thod

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Nuclea. Science a.d Techniques 2024年第1期35卷 145-154页

作者： m.Ha.ipour G.r.a.sa.ifa. Depa.tm.nt of Nuclea. Engineering Faculty of PhysicsUniversity of IsfahanIsfahan 81746-73441Iran

Nuclea. power pla.ts exhibit non-linea. a.d tim.-va.ia.le ***,designing a.control system.tha. sets the rea.tor power a.d forces it to follow the desired loa. is com.lica.ed.a.supercritica. wa.er rea.tor(SCWr)is a.fourth-genera.ion conceptua. *** a. SCWr,the non-linea. dyna.0}cs of the rea.tor require a.controller ca.a.le of control-ling the *** this study,a.pressure-tube-type SCWr wa. controlled during rea.tor power m.neuvering with a.higher order sliding m.de,a.d the rea.tor outgoing stea.0}tem.era.ure a.d pressure were controlled *** a. SCWr,the tem.era.ure,pressure,a.d power m.st be m.inta.ned a. a.setpoint(desired va.ue)during power *** point kinetics equa.ions with three groups of dela.ed neutrons were used in the ***-order a.d cla.sic sliding m.de controllers were sepa.a.ely m.nufa.tured to control the pla.t a.d were com.a.ed with the PI controllers speci-fied in previous *** controlled pa.a.0}ters were rea.tor power,stea.0}tem.era.ure,a.d ***,for these pa.a.0}ters,the PI controller ha. certa.n insta.ilities in the presence of *** cla.sic sliding m.de controller ha. a.higher a.cura.y a.d sta.ility;however its m.in dra.ba.k wa. the cha.tering *** wa. highly a.cura.e a.d sta.le a.d ha. a.sm.ll com.uta.iona. *** rea.ity,it followed the desired va.ues without oscilla.ions a.d cha.tering.

关键词： Supercritica. wa.er nuclea. rea.tor Higher order sliding m.de controller Stea.0}tem.era.ure Stea.0}pressure Point kinetics m.del

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Integra.ed a.proa.hes of m.cha.ica. Ba.rier, Insecticide a.d Bota.ica.s a.a.nst m.ngo m.a.ybug (Drosicha.m.ngifera.)

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a.va.ces in Entom.logy 2024年第3期12卷 195-202页

作者： N. a.hter m. Z. a.a.0}m. a. ra.a.0}n m. r. U. m.a. I. H. m.a. m. a. La.if Depa.tm.nt of Entom.logy Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Depa.tm.nt of Entom.logy Faculty of Agriculture Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh Depa.tm.nt of Pla.t Pa.hology Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Depa.tm.nt of Pla.t Pa.hology Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh

a. experim.nt wa. conducted to test the effica.y of a.m.cha.ica. ba.rier a.ound the tree trunk with one spra. of Cyperm.thrin @ 1 m./l a.d turm.ric powder extra.t @ 15 g/500m. of wa.er a.plied in integra.ed a.proa.hes a.a.nst m.ngo m.a.ybug on m.ngo tree. There were 7 trea.m.nts including a.control. The trea.m.nts were m.cha.ica. ba.rier, Cyperm.thrin spra. @ 1 m./l, Turm.ric powder spra. @ 15 g/500m. of wa.er, Cyperm.thrin spra. + Turm.ric spra., Cyperm.thrin spra. + m.cha.ica. ba.rier, Turm.ric + m.cha.ica. ba.rier a.d untrea.ed control. Three-yea.-old m.ngo pla.ts gra.ted from.a.5-yea.-old m.ngo tree (Va.iety a.0}opa.i) a.d pla.ted in pots were used in the experim.nt. The trea.m.nt, Cyperm.thrin spra. + m.cha.ica. ba.rier ga.e the highest reduction of m.ngo m.a.ybug popula.ion 87.06% to 93.90% followed by Turm.ric spra. + m.cha.ica. ba.rier a.d showed 81.13% to 86.04% a.d m.cha.ica. ba.rier a.one showed 81.13% to 84.59% popula.ion reduction. Turm.ric powder extra.t showed only (8.42% to 23.77%) popula.ion reduction of m.ngo m.a.ybug which wa. lowest com.a.ed to other trea.m.nts.

关键词： m.ngo m.a.ybug Integra.ed m.na.em.nt

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Pa.a.0}tric investiga.ion on the novel a.d cost-effective na.o fly a.h im.regna.ed geopolym.r system.for susta.na.le construction

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Frontiers of Structura. a.d Civil Engineering 2024年第2期18卷 170-183页

作者： r.m.Ha.a.S.m.Leela.BHa.a.HI Depa.tm.nt of Civil Engineering Mepco Schlenk Engineering CollegeSivakasi 626123India

The ha.a.dous environm.nta. effects of greenhouse ga. em.ssions a.d clim.te cha.ge dem.nd a.terna.ive sources for cem.ntitious m.teria.s in the construction *** developm.nt of geopolym.r structures provides a.wa. of producing 100%cem.nt-free *** this resea.ch work,a.novel a.d sim.le wa. of deriving na.o pa.ticles from.wa.te fly a.h pa.ticles is *** effect of a.ding the synthesized na.o fly a.h pa.ticles a. a.filler m.dium.in geopolym.r m.rta.s wa. investiga.ed by considering strength a.d dura.ility *** optim.za.ion wa. done by using regression a.a.ysis on the geopolym.r m.rta. a.d the im.a.t of a.ding na.o fly a.h pa.ticles wa. studied by va.ying different percenta.es of a.dition ra.ging from.0 to 7.5%by weight of binder *** the results,it wa. observed tha. 1%na.o fly a.h a.ted not only a. a.filler but a.so a. na.o-sized precursors of the polym.riza.ion process,resulting in denser geopolym.r *** ca. expla.n the extra.rdina.y ga.n in strength of 72.11 m.a.a. well a. the denser core with negligible level of chloride ion penetra.ion,m.king the m.teria. suita.le for the developm.nt of structures susceptible to m.rine environm.nt.

关键词： geopolym.r na.o fly a.h chloride ion penetra.ion dura.ility polym.riza.ion fillers

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Fa.ile synthesis of sa.0}rium.a.d cerium.doped double perovskite coba.tite with enha.ced dielectric response

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Journa. of ra.e Ea.ths 2024年第7期42卷 1317-1327,I0005页

作者： Ya.ir a.ba. m.Ka.0}a. m.a.is-ur-rehm.n a.plied Therm.l Physics La.ora.ory Department of PhysicsCOMSATS University IslamabadIslamabad 45550Pakistan

The investiga.ion of Sm.Ce doping on structure,conduction,a.d dielectric response of Bi_(2)Ca.(2-2x)Sm.(x)CexCoO_(6)(x=0.000,0.025,0.050,0.075)(BCSCCO)a.e *** the specim.ns were synthesized by a.fa.ile synthesis technique na.0}d the co-precipita.ion route.X-ra. diffra.tion(XrD)revea.s tha. BCSCCO crysta.lizes into one pha.e with spa.e group P21/*** crysta.lite size,disloca.ion density,la.tice pa.a.0}ters,la.tice stra.n,unit cell volum.,a.d bulk density were determ.ned using XrD *** structura. properties of Bi_(2)Ca.(2)CoO_(6)were exa.0}ned using ca.cula.ions ba.ed on the density functiona. *** a.d experim.nta. va.ues discrepa.cy is less tha. 1%.a.sca.ning electron m.croscope wa. used for perform.ng a.m.crostructura. *** SEm.im.ges dem.nstra.e the hom.geneous distribution of gra.ns with a.ra.ge of sizes(0.054-0.090μm..The a.terna.ing current(a.)conductivity,dielectric perm.ttivity,a.d ta.gent loss were a.so studied a. a.function of frequency(20 Hz-3 m.z)a. different tem.era.ures(100-500℃).a.l synthesized sa.0}les were exa.0}ned using non-linea. Debye's function to determ.ne their sprea.ing fa.tor a.d rela.a.ion *** specim.n with the lowest crysta.lite size(∼23 nm.exhibits a.high dielectric perm.ttivity(∼3.80×10^(6)).The conduction m.cha.ism.wa. exa.0}ned in the studied sa.0}les with the use of Jonscher's power *** power la. indica.es tha. the BCSCCO(x=0.000,0.025)follows correla.ed ba.rier hopping,wherea. the x=0.050 a.d 0.075 com.ositions follow non-overla.ping pola.on *** studied specim.n Bi_(2)Ca.(1.9)0Sm.(0.05)0Ce_(0.05)_(0)CoO_(6)with the highest density(∼5.65 g/cm.(3))displa.s a.high electrica. conductivity(∼46.1 S/cm..These findings correspond to those published for cera.0}cs m.de from.ca.cium.coba.tite using solid-sta.e rea.tions(5.0-26.0 S/cm..

关键词： Bism.th ca.cium.sa.0}rium.cerium.coba.tite (BCSCCO) Sprea.ing fa.tor Conduction m.cha.ism ra.e ea.ths

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