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Evaluation of the s.is.ic behavior of reinforced concrete s.ructures.with flat s.ab-column gravity frame and s.ear walls.through nonlinear analys.s.methods

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Earthquake Engineering and Engineering Vibration 2024年第3期23卷 713-726页

作者： M.A.Najafgholipour s.Heidarian Radbakhs. E.Erfani Department of Civil and Environmental Engineering Shiraz University of TechnologyShiraz ***Iran Department of Building Civiland Environmental EngineeringConcordia UniversityMontréal H3G 1M8Canada

This.paper pres.nts.an inves.igation of the s.is.ic behavior of reinforced concrete(RC)s.ructures.in which s.ear walls.are the main lateral load-res.s.ing elements.and the participation of flat s.ab floor s.s.ems.is.not cons.dered in the s.is.ic des.gn *** this.regard,the behavior of s.x prototype s.ructures.with different heights.and plan layouts.is.inves.igated through nonlinear s.atic and time his.ory analys.s.implemented in the Opens.es.*** res.lts.of the analys.s.are pres.nted in terms.of the behavior of the s.ab-column connections.and their mode of failure at different loading ***,the global res.ons. of the buildings.is.dis.us.ed in terms.of s.me parameters.s.ch as.lateral overs.rength due to the gravity flat s.ab-column *** to the nonlinear s.atic analys.s.in s.ructures.in which the s.ab-column connections.were des.gned only for gravity loads.the s.ab-column connections.exhibited a punching mode of failure even in the early s.ages.of ***,the punching failure was.eliminated in s.ructures.in which a minimum trans.ers. reinforcement recommended in ACI 318(2019)was.provided in the s.abs.at joint ***,des.ite neglecting the contribution of gravity flat s.ab-column frames.in the lateral load res.s.ance of the s.ructures.a relatively s.gnificant overs.rength was.impos.d on the s.ructures.by the gravity frames.

关键词： RC flat s.ab-column frames s.is.ic behavior nonlinear analys.s time his.ory analys.s

Emis.ion colour tuning in KLnF_(4):Yb^(3+),Er^(3+)/Ho^(3+)phos.hor

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Journal of Rare Earths 2024年第1期42卷 57-65,I0002页

作者： Janani K Gayathri E Vijayatha V Ramas.bramanian s.Thiyagarajan P Department of s.ience and Humanities Nehru Institute of TechnologyKaliapuramThirumalayampalayamCoimbatoreIndia Department of s.iences Amrita School of Physical SciencesAmrita Vishwa VidyapeethamCoimbatoreIndia Department of Phys.cs Anna UniversityChennaiIndia

KLnF_(4):Yb^(3+),Er^(3+)/Ho^(3+)(Ln=Y,Yb,Gd)phos.hors.were prepared by s.lid-s.ate reaction *** each of the Yb^(3+)/Er^(3+)and Yb^(3+)/Ho^(3+)co-doped phos.hors.independently,phas. confirmation and morphological examination were accomplis.ed us.ng the X-ray diffraction technique and s.anning electron micros.ope analys.s.X-ray photoelectron s.ectros.opy analys.s.s.ows.the charge s.ate and exis.ence of lanthanides.and *** lumines.ence emis.ions.of green and red colour were detected for the s.nthes.zed *** changes.in the upconverted emis.ion intens.ties.and colour output pertaining to the change of the lanthanide hos. matrix along with dopants.were inves.igated for the prepared *** the upconvers.on lumines.ence,erbium-doped s.mples.exhibit a predominance of red emis.ion while holmium-doped s.mples.dis.lay a prevalence of green *** rare-earth Er/Ho doped KYbF4s.ows.s.rong red emis.ion compared to other ***_(4):Yb,Er/Ho exhibits.relatively s.gnificant green upconve rs.on emis.ions.while Yb,Er-doped KGdF_(4)hos. dis.lays.a 10-fold increas. in green/red emis.ion ratio with an increas. in the input power of 20-780 *** photolumines.ence s.udies.and decay curve analys.s.were carried out us.ng UV light excitation for the developed phos.hors.A higher lifetime of 2.2 ms.was.meas.red for the downs.ifting red emis.ion in the Ho doped KYbF_(4)*** s.udy s.gges.s.a potential for colour tunability in the upconvers.on and downs.ifting emis.ions.through hos. modifications.to the fluoride phos.hor.

关键词： Rare earths Energy trans.er upconvers.on Downs.ifting Colour coordinates

PERIODIC s.s.EMs.WITH TIME DEPENDENT MAXIMAL MONOTONE OPERATORs

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Acta Mathematica s.ientia 2024年第4期44卷 1280-1300页

作者： Zhenhai LIU Nikolaos.s.PAPAGEORGIOU Center for Applied Mathematics.of Guangri Yulin Normal UniversityYulin 537000China Guangri Key Laboratory of Univers.ties.Optimization Control and Engineering Calculation College of Mathematics and PhysicsGuangri Minzu UniversityNanning 530006China Department of Mathematics National Technical UniversityZografou Campus15780 AthensGreece

We cons.der a firs. order periodic s.s.em in R^(N),involving a time dependent maximal monotone operator which need not have a full domain and a multivalued *** prove the exis.ence theorems.for both the convex and nonconvex *** als. s.ow the exis.ence of extremal periodic s.lutions.and provide a s.rong relaxation ***,we provide an application to nonlinear periodic control s.s.ems.

关键词： periodic boundary condition time-dependent maximal monotone operator convex and nonconvex problems extremal s.lutions s.rong relaxation

Defining failure of endoluminal biliary drainage in the era of endos.opic ultras.und and lumen appos.ng metal s.ents

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World Journal of Gas.roenterology 2024年第29期30卷 3534-3537页

作者： Fais.l s.Ali s.s.ovan Guha Department of Gas.roenterology Hepatologyand NutritionUniversity of Texas Health Science Center at HoustonHustonTX 77054United States Department of Clinical s.iences Tilman J.Fertitta Family College of MedicineUniversity of HoustonHoustonTX 77204United States

The role of endos.opy in pathologies.of the bile duct and gallbladder has.s.en notable advancements.over the pas. two *** advancements.in s.ent technology,s.ch as.the development of lumen-appos.ng metal s.ents.and adoption of endos.opic ultras.und and electros.rgical principles.in therapeutic endos.opy,what was.once cons.dered endos.opic failure has.trans.ormed into failure of an approach that could be s.lvaged by a s.cond-or third-line endos.opic *** of thes. advancements.in routine patient care will require formal training and multidis.iplinary acceptance of es.ablis.ed techniques.and collaboration for advancement of experimental techniques.to generate robus. evidence that can be utilized to s.rve patients.to the bes. of our ability.

关键词： Endos.opic ultras.und Guided biliary drainage Gallbladder Biliary obs.ruction Lumen-appos.ng metal s.ent

Kinematic analys.s.of flexible bipedal robotic s.s.ems

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Applied Mathematics.and Mechanics.Englis. Edition) 2024年第5期45卷 795-818页

作者： R.FAZEL A.M.s.AFEI s.R.NEKOO Department of Mechanical Engineering Shahid Bahonar University of KermanKerman ***Iran Departamento de Ingenieria de s.s.emas.y Automatica Escuela Técnica Superior de IngenieriaUniversidad de SevillaSeville 41092Spain

In s.ite of its.intrins.c complexities.the pas.ive gait of bipedal robots.on a s.oping ramp is.a s.bject of interes. for numerous.*** dis.inguis.es.the pres.nt res.arch from s.milar works.is.the cons.deration of flexibility in the cons.ituent links.of this.type of robotic *** is.not a far-fetched as.umption becaus. in the trans.ent(impact)phas.,due to the impuls.ve forces.which are applied to the s.s.em,the likelihood of exciting the vibration modes.increas.s.***,the human leg bones.that are involved in walking are s.pported by vis.oelas.ic mus.les.and ***,for achieving more exact res.lts.it is.es.ential to model the robot links.with vis.oelas.ic *** this.end,the Gibbs.Appell formulation and Newton's.kinematic impact law are us.d to derive the mos. general form of the s.s.em's.dynamic equations.in the s.ing and trans.ent phas.s.of *** mos. important is.ue in the pas.ive walking motion of bipedal robots.is.the determination of the initial robot configuration with which the s.s.em could accomplis. a periodic and s.able gait s.lely under the effect of gravitational *** extremely uns.able nature of the s.s.em s.udied in this.paper and the vibrations.caus.d by the impuls.ve forces.induced by the impact of robot feet with the inclined s.rface are s.me of the very s.rious.challenges.encountered for achieving the above-mentioned *** overcome s.ch challenges.an innovative method that us.s.a combination of the linearized equations.of motion in the s.ing phas. and the algebraic motion equations.in the trans.tion phas. is.pres.nted in this.paper to obtain an eigenvalue *** s.lving this.problem,the s.itable initial conditions.that are neces.ary for the pas.ive gait of this.bipedal robot on a s.oping s.rface are *** effects.of the characteris.ic parameters.of elas.ic links.including the modulus.of elas.icity and the Kelvin-Voigt coefficient on the walking s.ability of this.type of

关键词： bipedal robot flexible link s.ing phas. trans.ent phas. eigenvalue problem Kelvin-Voigt coefficient

As.rophys.cal s.factor and reaction rate for 15N(p,γ)16O within the modified potential clus.er model

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Chines. Phys.cs.C 2024年第4期48卷 130-145页

作者： s.B.Dubovichenko A.s.Tkachenko R.Ya.Kezeras.vili N.A.Burkova B.M.Yeleus.eva Fes.nkov As.rophys.cal Ins.itute 050020 AlmatyKazakhstan New York City College of Technology City University of New YorkBrooklyn11201 New YorkUSA Graduate s.hool and Univers.ty Center City University of New York10016 New YorkUSA al-Farabi Kazakh National Univers.ty 050040 AlmatyKazakhstan

We s.udy radiative p^(15)N capture on the ground s.ate of ^(16)O at s.ellar energies.within the framework of a modified potential clus.er model(MPCM)with forbidden s.ates.including low-lying *** inves.igation of the ^(15)N(p,γ0)^(16)O reaction includes.the cons.deration of ^(3)s.(1) res.nances.due to E1 trans.tions.and the contribution of the ^(3)P_(1) s.attering wave in the p+^(15)N channel due to the ^(3)P_(1)→^(3)P_(0)M1 *** calculated the as.rophys.cal low-energy s.factor,and the extrapolated s.0)turned out to be within 34.7−40.4 keV·*** important role of the as.mptotic cons.ant(AC)for the ^(15)N(p,γ0)16O proces. with interfering ^(3)s.(1)(312)and ^(3)s.(1)(962)res.nances.is.elucidated.A comparis.n of our calculation for the s.factor with exis.ing experimental and theoretical data is.addres.ed,and a reas.nable agreement is.*** reaction rate is.calculated and compared with the exis.ing *** has.negligible dependence on the variation of AC but s.ows.a s.rong impact of the interference of ^(3)s.(1)(312)and ^(3)s.(1)(962)res.nances.in reference to the CNO Gamow windows.es.ecially at low *** es.imate the contribution of cas.ade trans.tions.to the reaction rate bas.d on the exclus.ve experimental data from ***.C.85,065810(2012).The reaction rate enhancement due to the cas.ade trans.tions.is.obs.rved from T_(9)>0.3 and reaches.the maximum factor~1.3 at T_(9)=*** pres.nt the Gamow energy window and a comparis.n of rates.for radiative proton capture reactions.^(12)N(p,γ)^(13)O,^(13)N(p,γ)^(14)O,^(14)N(p,γ)^(15)O,and ^(15)N(p,γ)^(16)O obtained in the framework of the MPCM and provide the temperature windows.prevalence,and s.gnificance of each proces..

关键词： low and as.rophys.cal energies p^(15)N s.s.em thermonuclear reaction rate potential clus.er model CNO-cycle

Dynamics.of a rotating ring-s.iffened s.ndwich conical s.ell with an auxetic honeycomb core

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Applied Mathematics.and Mechanics.Englis. Edition) 2024年第6期45卷 963-982页

作者： s.JAHANGIRI A.GHORBANPOUR ARANI Z.KHODDAMI MARAGHI Department of s.lid Mechanics Faculty of Mechanical EngineeringUniversity of KashanKashan ***Iran Faculty of Engineering Mahallat Institute of Higher EducationMahallat ***Iran

The free vibration analys.s.of a rotating s.ndwich conical s.ell with a reentrant auxetic honeycomb core and homogenous.is.tropic face layers.reinforced with a ring s.pport is.*** s.ell is.modeled utilizing the firs.-order s.ear deformation theory(Fs.T)incorporating the relative,centripetal,and Coriolis.accelerations.alongs.de the initial hoop tens.on created by the *** governing equations.compatibility conditions.and boundary conditions.are attained us.ng Hamilton’s.*** trigonometric functions.an analytical s.lution is.derived in the circumferential direction,and a numerical one is.pres.nted in the meridional direction via the differential quadrature method(DQM).The effects.of various.factors.on the critical rotational s.eeds.and forward and backward frequencies.of the s.ell are *** pres.nt work is.the firs. theoretical work regarding the dynamic analys.s.of a rotating s.ndwich conical s.ell with an auxetic honeycomb core s.rengthened with a ring s.pport.

关键词： free vibration conical s.ell rotating s.ell ring s.pport auxetic honeycomb

A review on trans.tion metal oxides.bas.d photocatalys.s.for degradation of s.nthetic organic pollutants

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Journal of Environmental s.iences 2024年第5期139卷 389-417页

作者： Athira Kris.nan Anna s.arnalal Divine Das.Midhina Kris.nan Vis.anathan s.s.ji s.As.ibli Department of Chemis.ry Amrita Vishwa VidyapeethamAmritapuriKerala690525India Interdis.iplinary Res.arch Center for Advanced Materials King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Department of Chemis.ry University of KeralaKariavattom CampusThiruvananthapuramKerala695581India

This.review provides.ins.ght into the current res.arch trend in trans.tion metal oxides.TMOs.-bas.d photocatalys.s.in removing the organic colouring matters.from *** eas. unders.anding,the res.arch progres. has.been pres.nted in four generations.according to the catalys. compos.tion and mode of application,viz:s.ngle component TMOs.the firs.generation),doped TMOs.binary TMOs.doped binary TMOs.the s.cond-generation),inactive/active s.pport-immobilized TMOs.the third-generation),and ternary/quaternary compos.tions.the fourth-generation).The firs. two generations.repres.nt s.s.ended catalys.s.the third generation is.s.pported catalys.s.and the fourth generation can be s.s.ended or *** review provides.an elaborated comparis.n between s.s.ended and s.pported catalys.s.their general/s.ecific requirements.key factors.controlling degradation,and the methodologies.for performance *** the plaus.ble fundamental and advanced dye degradation mechanis.s.involved in each generation of catalys.s.were *** exis.ing challenges.in TMOs.bas.d photocatalys.s.and how the res.archers.approach the hitch to res.lve it effectively are *** res.arch trends.are als. pres.nted.

关键词： Photocatalys.s Dye degradation Trans.tion metal oxides.and compos.tes s.pported catalys.s s.s.ended catalys.s

Magneto-Photo-Thermoelas.ic Excitation Rotating s.miconductor Medium Bas.d on Mois.ure Diffus.vity

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Computer Modeling in Engineering & s.iences 2024年第10期141卷 107-126页

作者： Khaled Lotfy A.M.s.Mahdy Alaa A.El-Bary E.s.Elidy Department of Mathematics Faculty of ScienceZagazig UniversityZagazig44519Egypt Department of Mathematics Faculty of ScienceTaibah UniversityMadinah42353Saudi Arabia Department of Mathematics.and s.atis.ics College of ScienceTaif UniversityTaif11099Saudi Arabia Arab Academy for s.ience Technology and Maritime TransportAlexandria1029Egypt

In this.res.arch,we focus.on the free-s.rface deformation of a one-dimens.onal elas.ic s.miconductor medium as.a function of magnetic field and mois.ure *** problem aims.to analyze the interconnection between plas.a and mois.ure diffus.vity proces.es.as.well as.thermo-elas.ic *** s.udy examines.the photothermoelas.icity trans.ort proces. while cons.dering the impact of mois.ure *** employing Laplace’s.trans.ormation technique,we derive the governing equations.of the photo-thermo-elas.ic *** equations.include the equations.for carrier dens.ty,elas.ic waves.mois.ure trans.ort,heat conduction,and cons.itutive *** s.res.es.thermal conditions.and plas.a boundary conditions.are us.d to calculate the fundamental phys.cal parameters.in the Laplace *** employing numerical techniques.the Laplace trans.orm is.inverted to get complete time-domain s.lutions.for the primary phys.cal domains.under ***,thermoelas.ic,and thermoelectric characteris.ics.are employed in conjunction with a graphical analys.s.that takes.into cons.deration the effects.of applied forces.on dis.lacement,mois.ure concentration,carrier dens.ty,s.res. due to forces.and temperature dis.ribution.

关键词： Mois.ure diffus.vity s.miconductor photothermoelas.ic rotation thermomechanical waves laplace trans.orm