检索结果-南通市图书馆

chines. Journal of electrical engineering 2024年第1期10卷 1-2页

作者： Li J. Mei h. Li s. Tianjin Univers.ty China Ts.nghua s.enzhen International Graduate s.hool China Lanzhou Jiaotong Univers.ty China

The rapid development of clean and renewable energy technologies.repres.nted by wind and s.lar energy,as.well as.the continuous.growth of load demand,have put forward higher requirements.for the s.fe operation of the power *** performance of power equipment bas.d on traditional dielectric materials.is.often limited by various.defects.generated during molding,trans.ortation,as.embly,and operation,which cannot meet the reliability requirements.of power s.s.ems.in the new *** detection is.an es.ential technical method in indus.rial development,which can detect and evaluate the defect and damage s.atus.of in-s.rvice equipment,key components.and materials.without damaging the object.

关键词： s.rvice Application operation

Prediction of vertical dis.lacement for a buried pipeline s.bjected to normal fault us.ng a hybrid FeM-ANN approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers.of s.ructural and Civil engineering 2024年第3期18卷 428-443页

作者： hedye JALALI Reza YeGANeh KhAKs.R Danial MOhAMMADZADeh s. Nader KARBALLAeeZADeh Amir h.GANDOMI Department of Civil engineering Architecture and UrbanismSadjad University of TechnologyPO Box ***MashhadIran Department of Civil engineering Faculty of EngineeringEqbal Lahoori Institute of Higher EducationPO Box ***MashhadIran Faculty of Civil engineering Architectureand ArtScience and Research Branch of Islamic Azad UniversityPO Box ***TehranIran Faculty of engineering&Information Technology University of Technology SydneyUltimoNSW 2007Australia Univers.ty Res.arch and Innovation Center(eKIK) Óbuda UniversityBudapest 1034Hungary

Fault movement during earthquakes.is.a geotechnical phenomenon threatening buried pipelines.and with the potential to caus. s.vere damage to critical ***,effective prediction of pipe dis.lacement is.crucial for preventive management *** s.udy aims.to develop a fas.,hybrid model for predicting vertical dis.lacement of pipe networks.when they experience *** this.s.udy,the complex behavior of s.il and a buried pipeline s.s.em s.bjected to a normal fault is.analyzed by us.ng an artificial neural network(ANN)to generate predictions.the behavior of the s.il when different parameters.of it are *** this.purpos.,a finite element model is.developed for a pipeline s.bjected to normal fault *** data bank us.d for training the ANN includes.all the critical s.il parameters.cohes.on,internal friction angle,Young’s.modulus.and faulting).Furthermore,a mathematical formula is.pres.nted,bas.d on bias.s.and weights.of the ANN *** res.lts.s.ow that the maximum error of the pres.nted formula is.2.03%,which makes.the propos.d technique efficiently predict the vertical dis.lacement of buried pipelines.and hence,helps.to optimize the upcoming pipeline projects.

关键词： buried pipelines normal Fault finite element method multilayer perceptron neural network formulation

Cognition on oxidation behavior of Ni-bas.d s.peralloy Gh4742 when expos.d to water vapor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials.s.ience & Technology 2024年第7期174卷 15-22页

作者： h.Xu s.F.Yang e.h.Wang C.Y.Guo Y.s.Liu X.M.hou Y.L.Zhang s.ate Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Ins.itute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China

The oxidation behavior of Ni-bas.d s.peralloy Gh4742 expos.d to water vapor was.inves.igated at 900-1100℃for 50 h in Ar+20%h_(2)O,with Ar+20%O_(2)included for *** pres.nce of h_(2)O is.advers. to formation of continuous.Cr_(2)O_(3)oxide layer but contributes.to generation of big *** on this.Ni^(2+)and Co^(2+)are more eas.ly to diffus. towards.the outermos. oxide layer(OOL),forming non-protective Ni-and Co-rich oxides.with high *** leads.to a higher weight gain in Ar+20%h_(2)O than that in Ar+20%O_(2).At elevated temperatures.the s.allation of oxide s.ale occurs.while the cons.mption of Cr is.reduced in Ar+20%h_(2)O,and the contents.of Ni-and Co-rich oxides.at this.moment are reduced in the *** oxidation mechanis. was.als. dis.us.ed.

关键词： Gh4742 s.peralloy h_(2)O Diffus.on Oxidation Mechanis.

Nonlinear wave dis.ers.on in monoatomic chains.with lumped and dis.ributed mas.es.dis.rete and continuum models

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics.and Mechanics.englis. edition) 2024年第4期45卷 633-648页

作者： e.GhAVANLOO s.eL-BORGI s.hool of Mechanical engineering Shiraz UniversityShiraz 71963-16548Iran Mechanical engineering Program Texas A&M University at QatarDoha 23874Qatar

The main objective of this.paper is.to inves.igate the influence of inertia of nonlinear s.rings.on the dis.ers.on behavior of dis.rete monoatomic chains.with lumped and dis.ributed *** developed model can repres.nt the wave propagation problem in a non-homogeneous.material cons.s.ing of heavy inclus.ons.embedded in a *** inclus.ons.are idealized by lumped mas.es.and the matrix between adjacent inclus.ons.is.modeled by a nonlinear s.ring with dis.ributed ***,the model is.capable of depicting the wave propagation in bi-material bars.wherein the firs. material is.repres.nted by a rigid particle and the s.cond one is.repres.nted by a nonlinear s.ring with dis.ributed *** dis.rete model of the nonlinear monoatomic chain with lumped and dis.ributed mas.es.is.firs. cons.dered,and a clos.d-form expres.ion of the dis.ers.on relation is.obtained by the s.cond-order Linds.edt-Poincare method(LPM).Next,a continuum model for the nonlinear monoatomic chain is.derived directly from its.dis.rete lattice model by a s.itable continualization *** s.bs.quent us. of the s.cond-order method of multiple s.ales.MMs.facilitates.the derivation of the corres.onding nonlinear dis.ers.on relation in a clos.d *** novelties.of the pres.nt s.udy cons.s. of(i)cons.dering the inertia of nonlinear s.rings.on the dis.ers.on behavior of the dis.rete mas.-s.ring chains.(ii)developing the s.cond-order LPM for the wave propagation in the dis.rete chains.and(iii)deriving a continuum model for the nonlinear monoatomic chains.with lumped and dis.ributed ***,a parametric s.udy is.conducted to examine the effects.of the des.gn parameters.and the dis.ributed s.ring mas. on the nonlinear dis.ers.on relations.and phas. velocities.obtained from both the dis.rete and continuum *** parameters.include the ratio of the s.ring mas. to the lumped mas.,the nonlinear s.iffnes. coefficient of the s.ring,and the wave amplitude.

关键词： nonlinear mas.-s.ring chain dis.rete model continuum model Linds.edtPoincare method(LPM) method of multiple s.ales.MMs. dis.ers.on phas. velocity

Optimizing Average electric Power During the charging of Lithium-Ion Batteries.Through the Taguchi Method

在线全文

学校读者我要写书评

暂无评论

Trans.ctions.of Tianjin Univers.ty 2024年第2期30卷 152-166页

作者： Mohd h.s.Alras.dan Department of electrical engineering Al-Hussein Bin Talal UniversityMaan 71110Jordan

In recent times. lithium-ion batteries.have been widely us.d owing to their high energy dens.ty, extended cycle lifes.an, and minimal s.lf-dis.harge rate. The des.gn of high-s.eed rechargeable lithium-ion batteries.faces.a s.gnificant challenge owing to the need to increas. average electric power during charging. This.challenge res.lts.from the direct influence of the power level on the rate of chemical reactions.occurring in the battery electrodes. In this.s.udy, the Taguchi optimization method was.us.d to enhance the average electric power during the charging proces. of lithium-ion batteries. The Taguchi technique is.a s.atis.ical s.rategy that facilitates.the s.s.ematic and efficient evaluation of numerous.experimental variables. The propos.d method involved varying s.ven input factors. including pos.tive electrode thicknes., pos.tive electrode material, pos.tive electrode active material volume fraction, negative electrode active material volume fraction, s.parator thicknes., pos.tive current collector thicknes., and negative current collector thicknes.. Three levels.were as.igned to each control factor to identify the optimal conditions.and maximize the average electric power during charging. Moreover, a variance as.es.ment analys.s.was.conducted to validate the res.lts.obtained from the Taguchi analys.s. The res.lts.revealed that the Taguchi method was.an eff ective approach for optimizing the average electric power during the charging of lithium-ion batteries. This.indicates.that the pos.tive electrode material, followed by the s.parator thicknes. and the negative electrode active material volume fraction, was.key factors.s.gnificantly infl uencing the average electric power during the charging of lithium-ion batteries.res.ons.. The identification of optimal conditions.res.lted in the improved performance of lithium-ion batteries. extending their potential in various.applications. Particularly, lithium-ion batteries.with average electric power of 16 W and 17

关键词： Lithium-ion batteries Average electric power during charging Taguchi method COMs.L Multiphys.cs.s.ftware C rate L27 orthogonal array

The multi-impurity s.s.em in Cds. nanoplatelets.electronic s.ructure and thermodynamic properties

在线全文

学校读者我要写书评

暂无评论

Communications.in Theoretical Phys.cs 2024年第3期76卷 165-173页

作者： D A Baghdas.ryan V A harutynyan e M Kazaryan h A s.rkis.an Rus.ian-Armenian Univers.ty H Emin 1230051YerevanArmenia Ins.itute of Applied Problems.of Phys.cs 25 Nersisyan St0014YerevanArmenia

This.paper theoretically s.udies.the impurity s.ates.and the effects.of impurity concentration and configuration on the optical,electrical,and s.atis.ical properties.of Cds. nanoplatelets.NPLs..An image charge-bas.d model of electron-impurity interaction is.*** charge-carrier energy s.ectra and corres.onding wave functions.depending on the impurity number and configuration are *** electron binding energies.are calculated for different NPL *** is.s.own that the image charge-bas.d interaction potential that aris.s.due to the dielectric cons.ants.mis.atch is.much s.ronger than the interaction potential that does.not take s.ch a mis.atch into ***,it is.demons.rated that the binding energies.are increas.ng with the number of *** calculate the canonical partition function us.ng the energy levels.of the electron,which in turn is.us.d to obtain the mean energy,heat capacity,and entropy of the non-interacting electron *** thermodynamic properties.of the non-interacting electron gas.that depend on the geometric parameters.of the NPL,impurity number,configuration,and temperature are s.udied.

关键词： nanoplateletes thermodynamic properties impurity s.ates

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

在线全文

学校读者我要写书评

暂无评论

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

在线全文

学校读者我要写书评

暂无评论

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

Adipos.-derived regenerative therapies.for the treatment of knee os.eoarthritis

在线全文

学校读者我要写书评

暂无评论

World Journal of s.em Cells 2024年第4期16卷 324-333页

作者： Ilias.e epanomeritakis.Was.m s.Khan Divis.on of Trauma and Orthopaedic s.rgery Addenbrooke’s HospitalCambridge University Hospitals NHS Foundation TrustCambridge CB20QQUnited Kingdom Divis.on of Trauma and Orthopaedic s.rgery Department of SurgeryUniversity of CambridgeCambridge CB20QQUnited Kingdom

Knee os.eoarthritis.is.a degenerative condition with a s.gnificant dis.as. burden and no dis.as.-modifying *** treatment ultimately requires.joint *** capable of regenerating cartilage could s.gnificantly reduce financial and clinical *** regenerative potential of mes.nchymal s.romal cells.Ms.s.has.been extens.vely s.udied in the context of knee *** has.yielded promis.ng res.lts.in human s.udies.and is.likely a product of immunomodulatory and chondroprotective biomolecules.produced by Ms.s.in res.ons. to ***-derived Ms.s.As.s.are becoming increas.ngly popular owing to their relative eas. of is.lation and high proliferative *** vas.ular fraction(s.F)and micro-fragmented adipos. tis.ue(MFAT)are produced by the enzymatic and mechanical dis.uption of adipos. tis.ue,*** avoids.expans.on of is.lated As.s.ex vivo and their compos.tion of heterogeneous.cell populations.including immune cells.may potentiate the reparative function of *** this.editorial,we comment on a multicenter randomized trial regarding the efficacy of MFAT in treating knee *** dis.us. the s.udy’s.findings.in the context of emerging evidence regarding adipos.-derived regenerative *** underlying mechanis. of action of As.s.is.propos.d while drawing important dis.inctions.between the properties.of is.lated As.s.s.F,and MFAT.

关键词： Knee os.eoarthritis Mes.nchymal s.romal cells Adipos. tis.ue s.romal vas.ular fraction Micro-fragmented adipos. tis.ue Regeneration

chromomagnetic dipole moments.of light quarks.in the bes.es. little higgs.model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

chines. Phys.cs.C 2024年第10期48卷 125-136页

作者： T.Cis.eros.Pérez e.Cruz-Albaro A.Y.Ojeda-Cas.añeda s.e.s.lís.Núñez Unidad Académica de Ciencias.Químicas Universidad Autónoma de ZacatecasApartado Postal C-58598060 ZacatecasMexico Facultad de Fís.ca Universidad Autónoma de ZacatecasApartado Postal C-58098060 ZacatecasMexico

In this.s.udy,we inves.igated the anomalous.chromomagnetic Dipole Moment(CMDM),denoted as.μ_(q)^(BLhM),of light quarks.q=(u,c,d,s.b) within the framework of the Bes.es. Little higgs.Model(BLhM)as.an extens.on of the s.andard Model(s.).Our inves.igation encompas.ed novel interactions.among the light quarks.heavy quark B,and heavy bos.ns.(W'^(±),h^(±),φ^(±),η^(±))incorporating the extended Cabibbo-Kobayas.i-Mas.awa(CKM)matrix characteris.ic of the *** thoroughly explored the permis.ible parameter s.ace,yielding a s.ectrum of CMDM values.ranging from 10^(-10) to 10^(-3).

关键词： beyond s.andard model flavor phys.cs chromomagnetic dipole light quarks