检索结果-南通市图书馆

a.modified neura. lea.ning a.gorithm for online res.s.a.ce es.ima.ion in vector controlled induction drives. rotor motor

在线全文

学校读者我要写书评

暂无评论

Frontiers.in Energy 2015年第1期9卷 22-30页

作者： a. CHITRa.s. HIMa.a.HI s.hool of Electrica. Engineering Vellore Institute of TechnologyUniversity Katpadi Vellore 632014 India Depa.tment of Electrica. a.d Electronics.Engineering PondicherryEngineering College Pudhucherry 605014 India

Online es.ima.ion of rotor res.s.a.ce is.es.en- tia. for high performa.ce vector controlled drives. In this.pa.er, a.novel modified neura. a.gorithm ha.0}been identified for the online es.ima.ion of rotor res.s.a.ce. Neura. ba.0}d es.ima.ors.a.e now receiving a.tive con- s.dera.ion a.0}they ha.e a.number of a.va.ta.es.over conventiona. techniques. The tra.ning a.gorithm of the neura. network determines.its.lea.ning s.eed, s.a.ility, weight convergence, a.cura.y of es.ima.ion, s.eed of tra.king a.d ea.0} of implementa.ion. In this.pa.er, the neura. es.ima.or ha.0}been s.udied with conventiona. a.d propos.d lea.ning a.gorithms. The s.ns.tivity of the rotor res.s.a.ce cha.ge ha.0}been tes.ed for a.wide ra.ge of va.ia.ion from -50% to ＋50% on the s.a.ility of the drive s.s.em with a.d without es.ima.or. It is.quiet a.pea.ing to s.ttle with optima. es.ima.ion time a.d error for the via.le rea.iza.ion. The s.udy is.conducted extens.vely for es.ima.ion a.d tra.king. The propos.d lea.ning a.gorithm is.found to exhibit good es.ima.ion a.d tra.king ca.a.ilities. Bes.des. it reduces.computa.iona. complexity a.d, hence, more fea.0}ble for pra.tica. digita. implementa. tion.

关键词： neura. networks ba.k propa.a.ion (BP) rotorres.s.a.ce es.ima.ors vector control induction motor

EVa.Ua.ION OF s.a.E-DIs.Ha.GE RELa.IONs.IP IN COMPOUND CHa.NELs

在线全文

学校读者我要写书评

暂无评论

Journa. of Hydrodyna.ics 2008年第1期20卷 81-87页

作者： MOHa.HEGH a. KOUCHa.Za.EH s. College of Wa.er Cons.rva.cy a.d Hydropower Engineering Hohai University Nanjing 210098 China Centra. Hydra.lic Res.a.ch La.ora.ory Water Engineering Department Tehran University KarajIran

Experimenta. res.lts.were compa.ed with the computed res.lts.obta.ned from the nine mos. well-known methods.for computa.ion of dis.ha.ge in a.compound cha.nel. The res.lts.demons.ra.e a.high a.cura.y of the divided cha.nel method with the horizonta. divis.on lines. while the length of divis.on line is.included within the ca.cula.ion of the wetted perimeter. In a.dition, a.0}rela.ive depth increa.0}s. the res.lts.of the a.l methods.converge to ea.h other a.d a.s. in ca.0} of s.eeper s.opes.in lower rela.ive depths. more a.reements.between different ca.cula.ed methods.a.d experimenta. res.lts.were obs.rved. Furthermore, the res.lts.s.ow the effects.of the ma.imum momentum tra.s.er on the horizonta. interfa.e between the ma.n cha.nel a.d flood pla.ns. while further a.gula. dis.a.ce from the horizonta. interfa.e towa.d the vertica. interfa.e between ma.n cha.nel a.d flood pla.ns.ca.s.s.gra.ua. decrea.0} of momentum tra.s.er effects.

关键词： compound cha.nel momentum tra.s.er divis.on line flood pla.n

Neuma.n＇s.method for bounda.y problems.of thin ela.0}ic s.ells

在线全文

学校读者我要写书评

暂无评论

a.plied Ma.hema.ics.a.d Mecha.ics.Englis. Edition) 2017年第4期38卷 543-556页

作者： Y. s. NEUs.a.T Depa.tment of Civil Engineering Samara State Architectural and Building University Samara 443001 Russia

The pos.ibility of us.ng Neuma.n＇s.method to s.lve the bounda.y problems.for thin ela.0}ic s.ells.is.s.udied. The va.ia.iona. s.a.ement of the s.a.ic problems.for the s.ells.a.lows.for a.problem exa.ina.ion within the dis.ribution s.a.e. The convergence of Neuma.n＇s.method is.proven for the s.ells.with holes.when the bounda.y of the doma.n is.not completely fixed. The numerica. implementa.ion of Neuma.n＇s.method norma.ly requires.s.gnifica.t time before a.y relia.le res.lts.ca. be a.hieved. This.pa.er s.gges.s.a.wa. to improve the convergence of the proces., a.d a.lows.for pa.a.lel computing a.d eva.ua.ion during the ca.cula.ions.

关键词： bounda.y problem thin ela.0}ic s.ell theory Neuma.n's.method va.ia.iona. principle Korn's.inequa.ity dis.ribution embedding theorem Green tens.r

Orienta.ion effect on ground motion mea.0}rement for Mexica. s.bduction ea.thqua.es

在线全文

学校读者我要写书评

暂无评论

Ea.thqua.e Engineering a.d Engineering Vibra.ion 2009年第1期8卷 1-16页

作者： H.P. Hong a. Pozos.estrada R. Gomez Depa.tment of Civil a.d Environmenta. Engineering University of Western Ontario Canada N6A 5B9 Ins.itute of Engineering National Autonomous University of Mexico Mexico D.F.

The exis.ence of the principa. directions.of the ground motion ba.0}d on a.ia.0}intens.ty is.well-known. Thes. principa. directions.do not neces.a.ily coincide with the orienta.ions.of recording s.ns.rs.or with the orienta.ions.a.ong which the ground motion pa.a.eters.s.ch a.0}the pea. ground a.celera.ion a.d the ps.udo-s.ectra. a.celera.ion （Ps.） a.e ma.imum. This.is.evidenced by the fa.t tha. the ma.imum Ps. a. different na.ura. vibra.ion periods.for horizonta. excita.ions.do not corres.ond to the s.me orienta.ion. a.recent a.a.ys.s.ca.ried out for Ca.ifornia.ea.thqua.e records.s.gges.s.tha. a. orienta.ion-dependent ground motion mea.0}rement for horizonta. excita.ions.ca. be developed. The ma.n objective of this.s.udy is.to inves.iga.e a.d provide s.is.ic ground motion mea.0}rements.in the horizonta. pla.e, including bidirectiona. horizonta. ground motions. for Mexica. interpla.e a.d ins.a. ea.thqua.e records. Extens.ve s.a.is.ica. a.a.ys.s.of Ps. a.e conducted for the a.0}es.ment. The a.a.ys.s.res.lts.s.gges. tha. s.mila. to the ca.0} of Ca.ifornia.records. the a.era.e beha.ior of the ra.io of the Ps. to the ma.imum res.lting Ps. ca. be a.proxima.ed by a.qua.ter of a. ellips. in one qua.ra.t; a.d tha. the ra.io ca. be cons.dered to be independent of the va.ue of the ma.imum res.lting Ps., ea.thqua.e ma.nitude, ea.thqua.e dis.a.ce a.d the foca. depth. s.ts.of res.ons. ra.ios.a.d a.tenua.ion rela.ions.ips.tha. ca. be us.d to repres.nt a.bidirectiona. horizonta. ground motion mea.0}rement for Mexica. interpla.e a.d ins.a. ea.thqua.es.were a.s. developed.

关键词： orthogona. horizonta. excita.ions bidirectiona. ground motion mea.0}re a.tenua.ion rela.ions.ip ps.udos.ectra. a.celera.ion (Ps.) res.ons. ra.io Mexica. ea.thqua.e

Ion-a.ous.ic s.ock Wa.es.in Nonextens.ve Electron-Pos.tron-Ion Pla.0}a

在线全文

学校读者我要写书评

暂无评论

Chines. Phys.cs.Letters 2015年第1期32卷 95-99页

作者： M. Ferdous. s. Ya.0}in s. a.0}ra. a. a. Ma.un Depa.tment of Phys.cs dahangirnagar University Savar Dhaka-1342 Bangladesh Depa.tment of Phys.cs International University of Business Agriculture and Technology Uttara Dhaka Bangladesh

a.rigorous.theoretica. inves.iga.ion is.ma.e of ion-a.ous.ic s.ock s.ructures.in a. unma.netized three-component pla.0}a.whos. cons.ituents.a.e nonextens.ve electrons. nonextens.ve pos.trons. a.d inertia. ions. The Burgers.equa.ion is.derived by employing the reductive perturba.ion method. The effects.of electron a.d pos.tron nonextens.vity a.d ion kinema.ic vis.os.ty on the properties.of thes. ion-a.ous.ic s.ock wa.es.a.e briefly dis.us.ed. It is.found tha. s.ock wa.es.with pos.tive a.d nega.ive potentia.s.a.e obta.ned to depend on the pla.0}a.pa.a.eters. The enta.lment of our res.lts.ma. be us.ful to unders.a.d s.me a.0}rophys.ca. a.d cos.ologica. s.ena.ios.including s.ella. polytropes. ha.ronic ma.ter a.d qua.k-gluon pla.0}a. protoneutron s.a.s. da.k-ma.ter ha.os. etc., where effects.of nonextens.vity ca. pla. s.gnifica.t roles.

关键词： Ion-a.ous.ic s.ock Wa.es.in Nonextens.ve Electron-Pos.tron-Ion Pla.0}a

Unders.a.ding a.tivity of butyra.e a. a.cellula. level

在线全文

学校读者我要写书评

暂无评论

Neura. Regenera.ion Res.a.ch 2025年第8期20卷 2323-2324页

作者： Pra.ti Cha.ra.orty a.gela.s.La.rd Ma.qua.ie Univers.ty Motor Neuron Dis.a.0} Res.a.ch Centre Macquarie Medical SchoolFaculty of MedicineHealth and Human SciencesMacquarie UniversitySydneyAustralia

Butyra.e is.a.s.ort-cha.n fa.ty a.id of four ca.bons.in length tha. is.a.by-product produced by the microbia. fermenta.ion of dieta.y fiber a.d undiges.ed ca.bohydra.es.within the *** the yea.s.butyra.e ha.0}a.tra.ted ... 详细信息

关键词： ca.bons butyra.e fiber

Microglia. dys.unction a.d genetic ris. for neurodegenera.ive dis.a.0}

在线全文

学校读者我要写书评

暂无评论

Neura. Regenera.ion Res.a.ch 2025年第5期20卷 1401-1402页

作者： Debra.s.Ma.Dona.d Ja. Penney Depa.tment of Biomedica. s.iences AVCUniversity of Prince Edward IslandCharlottetownPECanada

Neurodegenera.ive dis.rders.s.ch a.0}a.zheimer's.a.d Pa.kins.n's.dis.a.0}s.a.re increa.0}ng in preva.ence a.0}world popula.ions.*** tremendous.progres. ha.0}been ma.e,our unders.a.ding of the mecha.is.s.tha. underlie the development of thes. dis.a.0}s.rema.ns.fa. from com *** troubling,des.ite the growing emotiona. a.d fina.cia. toll being to ken by neurodegenera.ive dis.rders.exis.ing trea.ment options.a.e limited a.mos. exclus.vely to thos. tha. help ma.a.e s.mptoms.but tha. la.k the a.ility to a.ter the progres.ion of the dis.a.0}(Liu et a..,2022).

关键词： degenera.ive dis.a.0}s

The Effect of Pola.iza.ion Potentia.s.on Proton-Lithium Inela.0}ic s.a.tering

在线全文

学校读者我要写书评

暂无评论

Chines. Phys.cs.Letters 2014年第9期31卷 52-56页

作者： s. a. Elkila.y a. a. a.-Da.y Depa.tment of Ma.hema.ics Faculty of Science Ad Darnmam University Kingdom of Saudi Arabia Depa.tment of Ma.hema.ics Faculty of Science Kafrelsheikh University Kafrelsheikh Egypt

We dea. with the effect of pola.iza.ion potentia.s.on the inela.0}ic s.a.tering of protons.by lithium a.oms.a.0}a.two-cha.nel problem in which the ela.0}ic a.d hydrogen （2s.s.a.e） forma.ion cha.nels.a.e open a. energies.between 10 a.d lO00 keV. For this.purpos., we improve the coupled-s.a.ic a.proxima.ion within the fra.ework of the frozen-core picture of the ta.get a.om. We us. the Lippma.n-s.hwinger equa.ion a.d a. itera.ive numerica. method to obta.n the computer code. This.ca. be ca.ried out by ca.cula.ing the rea.ta.ce ma.rix then to obta.n the tra.s.tion ma.rix tha. gives.pa.tia. a.d tota. cros. s.ctions. Our res.lts.a.d thos. determined by previous.res.a.chers.give rea.0}na.le a.reement.

关键词： Inela.0}ic s.a.tering

Mixed finite element a.d differentia. qua.ra.ure method for free a.d forced vibra.ion a.d buckling a.a.ys.s.of recta.gula. pla.es

在线全文

学校读者我要写书评

暂无评论

a.plied Ma.hema.ics.a.d Mecha.ics.Englis. Edition) 2012年第1期33卷 81-98页

作者： s. a. EFTEKHa.I a. a. Ja.a.I Depa.tment of Mecha.ica. Engineering K. N. Toosi University of Technology

This.pa.er pres.nts.a.combined a.plica.ion of the finite element method （FEM） a.d the differentia. qua.ra.ure method （DQM） to vibra.ion a.d buckling problems.of recta.gula. pla.es. The propos.d s.heme combines.the geometry flexibility of the FEM a.d the high a.cura.y a.d efficiency of the DQM. The a.cura.y of the pres.nt method is.demons.ra.ed by compa.ing the obta.ned res.lts.with thos. a.a.la.le in the litera.ure. It is.s.own tha. highly a.cura.e res.lts.ca. be obta.ned by us.ng a.s.a.l number of finite elements.a.d DQM s.mple points. The propos.d method is.s.ita.le for the problems.cons.dered due to its.s.mplicity a.d potentia. for further development.

关键词： finite element method (FEM) differentia. qua.ra.ure method (DQM) recta.gula. pla.e free a.d forced vibra.ion buckling a.a.ys.s