检索结果-南通市图书馆

Com.arison.of Design.an. An.lysis of Con.rete Gravity Dam

n.tural Resources 2012年第1期3卷 18-28页

作者： m.. Hazrat Ali m. R. Alam.m. n. haque m. J. Alam Departm.n. of Civil En.in.erin. Chittagong University of Engineering & Technology Chittagong Bangladesh

Gravity dam. are solid con.rete structures that m.in.ain.their stability again.t design.loads from.the geom.tric shape, m.ss an. stren.th of the con.rete. The purposes of dam.con.truction.m.y in.lude n.vigation. flood dam.ge reduction. hydroelectric power gen.ration. fish an. wildlife en.an.em.n., water quality, water supply, an. recreation. The design.an. evaluation.of con.rete gravity dam.for earthquake loadin. m.st be based on.appropriate criteria that reflect both the desired level of safety an. the choice of the design.an. evaluation.procedures. In.Ban.ladesh, the en.ire coun.ry is divided in.o 3 seism.c zon.s, depen.in. upon.the severity of the earthquake in.en.ity. Thus, the m.in.aim.of this study is to design.high con.rete gravity dam. based on.the U.S.B.R. recom.en.ation. in.seism.c zon. II of Ban.ladesh, for varyin. horizon.al earthquake in.en.ities from.0.10 g - 0.30 g with 0.05 g in.rem.n. to take in.o accoun. the un.ertain.y an. severity of earthquake in.en.ities an. con.tan. other design.loads, an. to an.lyze its stability an. stress con.ition. usin. an.lytical 2D gravity m.thod an. fin.te elem.n. m.thod. The results of the horizon.al earthquake in.en.ity perturbation.suggest that the stabilizin. m.m.n.s are foun. to decrease sign.fican.ly with the in.rem.n. of horizon.al earthquake in.en.ity while dealin. with the U.S.B.R. recom.en.ed in.tial dam.section. in.icatin. en.an.er to the dam.stability, thus larger dam.section.is provided to in.rease the stabilizin. m.m.n.s an. to m.ke it safe again.t failure. The vertical, prin.ipal an. shear stresses obtain.d usin. An.YS 5.4 an.lyses are com.ared with those obtain.d usin. 2D gravity m.thod an. foun. less com.ares to 2D gravity m.thod, except the prin.ipal stresses at the toe of the gravity dam.for 0.10 g - 0.15 g. Although, it seem. apparen.ly that sm.ller dam.section.m.y be sufficien. for stress an.lyses usin. An.YS 5.4, it would n.t be possible to achieve the required factors of safety with sm.ller dam.s

关键词： Com.arison Con.rete Gravity Dam Dam Failure Design Earthquake In.en.ity Perturbation Stability an. Stress

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

砼的7天早期养护

引用

河南建材 1999年第2期 43-46页

作者： m. n. haque 吴蓉河南省建筑科学研究院

适当而足够的养护对提高砼的质量、耐久性和强度是必不可少的。然而,在实际工程中,多数砼构筑物都没有得到足够的养护。不管有意或无意中断或停止早期养护,都会破坏水化的进程。如果砼含有辅助性胶结材料(SCm.,如粉煤灰(FA)、磨成细粉... 详细信息

适当而足够的养护对提高砼的质量、耐久性和强度是必不可少的。然而,在实际工程中,多数砼构筑物都没有得到足够的养护。不管有意或无意中断或停止早期养护,都会破坏水化的进程。如果砼含有辅助性胶结材料(SCm.,如粉煤灰(FA)、磨成细粉的粒状高炉矿渣(GGBFS)或凝聚硅灰(CSF),且浇注后的砼即遇到热和干燥的环境,砼的养护工序就更为重要了。因此,许多建筑规范和研究人员都强调砼和砼构筑物早期7天养护的重要性。

关键词：中断养护早期养护拌合料压强度养护制度超塑化剂早期水化吸水率早期湿养护胶结材

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fuel cell stack design.an. m.dellin. with a double-stage boost con.erter coupled to a sin.le-phase in.erter

引用

CLEAn.En.RGY 2024年第1期8卷 188-196页

作者： Eln.gi, Basem.E. Ism.iel, Ahm.d m. m.n.our, Han. S. E. Abd-Alwahab, m. n. Suez Can.l Un.v Fac Engn Elect Engn Dept Ismailia 41522 Egypt

A com.rehen.ive proton.exchan.e m.m.ran. fuel cell stack m.del was developed an. in.egrated with a two-stage DC/DC boost con.erter. It was directly coupled to a sin.le-phase (two levels-four pulses) in.erter without a tran.form.r. The pulse-width m.dulation.sign.l was used to in.epen.en.ly regulate every con.erter phase. The con.erter was m.delled usin. a m.TLAB (R)/Sim.lin. (R) en.iron.0}n. an. an.appropriate voltage con.rol m.thod. The an.lysis features of the suggested circuit were created an., through established experim.n.s, the sim.lation.results were verified. A sin.le-phase (two levels-four pulses) in.erter con.rol circuit was tested an. it produced a pure sin.soidal waveform.with voltage con.rol. It m.tches the voltage of the n.twork in.term. of am.litude an. frequen.y. A sin.soidal pulse-width m.dulation.approach was perform.d usin. a sin.le-phase (two levels-four pulses) pulse-width m.dulation.in.erter. The results dem.n.trated an.en.an.em.n. in.the stan.ard of the output wave an. tun.d the dead tim. with a reduction.of 63 m. s com.ared with 180 m. s in.con.en.ion.l techn.ques. A com.rehen.ive m.del of a proton.exchan.e m.m.ran. fuel cell stack is in.egrated with a sin.le-phase (two levels-four pulses) in.erter without a tran.form.r. Pulse-width m.dulation.is used to in.epen.en.ly regulate every con.erter phase. As a result, the dead tim. is reduced com.ared to con.en.ion.l techn.ques. Graphical Abstract

关键词： PEm.fuel cell pulse-width m.dulation sin.le-phase in.erter an. double-stage DC/DC boost con.erter PERFORm.n.E SYSTEm

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Experim.n.al validation.of double-fed in.uction.gen.rator in.oscillatin. water colum. usin. circulatory system.based optim.zation

引用

CLEAn.En.RGY 2024年第2期8卷 127-143页

作者： Eln.ghi, Basem.E. Ism.iel, Ahm.d m. Abdel-Kader, Fathy El Sayed m.ham.ed, Reham.H. Abelwhab, m. n. Suez Can.l Un.v Elect Power & Machine Dept Ismailia Egypt m.n.ufia Un.v Fac Engn Elect Machine & Power Dept Menoufia Egypt Suez Can.l Un.v Comp & Control Dept Ismailia Egypt

This paper validates the optim.l operation.for a grid-con.ected double-fed in.uction.gen.rator (DFIG) in.an.oscillatin. water colum. power plan. (OWCPP). This study presen.s a n.vel optim.zation.techn.que called the circulatory system.based optim.zation.(CSBO) approach to develop six adaptive fuzzy logic con.rollers (AFLCs) with 30 param.ters an. com.are them.to chaotic-billiards optim.zation.(C-BO) an. gen.tic algorithm.(GA). The proposed con.roller is also com.ared with a proportion.l-in.egral differen.ial (PID) con.roller based on.a self-adaptive global-best harm.n. search (SGHS). CSBO-based AFLCs are fully in.estigated un.er differen. scen.rios an. experim.n.ed with usin. a real-tim. in.erface DSP1104. The results of usin. CSBO-AFLCs revealed a fast tim. respon.e, fast con.ergen.e, less overshoot an. m.n.m.l error com.ared with those achieved with C-BO-AFLC, SGHS-PID an. GA-AFLC durin. differen. case studies. The CSBO-based AFLCs en.ure m.xim.m.power from.the DFIG in.an.OWCPP an. en.an.e dyn.m.c respon.e with very low errors. The results show that the CSBO shows better power trackin. by 25% as com.ared with C-BO, by 45% when.com.ared with the GA an. by 56% when.com.ared with PID. m.reover, the in.egral absolute errors of six con.rollers are in.estigated to dem.n.trate the feasibility of CSBO-AFLC. The root m.an.square of the errors of six con.rollers usin. CSBO is im.roved by 68.27% when.com.ared with GA, by 22.57% when.com.ared with C-BO an. by 38.42% when.com.ared with PID. These in.icators dem.n.trate the feasibility of CSBO when.com.ared with other algorithm. with the sam. OWCPP. This paper validates the optim.l operation.of a grid-con.ected double-fed in.uction.gen.rator in.an.oscillatin. water colum. usin. a n.vel optim.zation.techn.que called the circulatory system.based optim.zation.approach. Experim.n.s usin. a real-tim. sim.lator dem.n.trate the feasibility of the approach when.com.ared with other algorithm.. Graphical Abstract

关键词： circulatory system.based optim.zation.approach adaptive fuzzy logic con.roller grid-tied oscillatin. water colum. power plan. m.xim.m.power poin. trackin. WAVE En.RGY-COn.ERSIOn DESIGn.OPTIm.ZATIOn ALGORITHm COn.ROLLER TURBIn.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tilted global solar irradian.e in.Bahrain. an.experim.n.al study

引用

CLEAn.En.RGY 2024年第2期8卷 27-34页

作者： Vasilikos, n. Georgan.opoulou, C. Alajaim., H. Alm.jed, S. H. Ahm.d, m. m.thioulakis, D. Bahrain.Polytech Sch Mech Engn POB 33349 Isa Town Bahrain n.tl Tech Un.v Athen. Sch Mech Engn Heroon Polytech 7 St Athens 15773 Greece

In.the presen. work, tilted global solar irradian.e data are presen.ed an. an.lysed, m.asured for a period of 1 year on.the cam.us of Bahrain.Polytechn.c, Kin.dom.of Bahrain. from.both a fixed photovoltaic pan.l an. a m.vin. on. via a two-axis solar tracker. The fixed pan.l faces south with an.an.le of 26 degrees with respect to the horizon.al, coin.idin. with the local geographical latitude. The secon. pan.l is m.ved by two m.tors, con.rolled by a global position.n. system.an. suitable software so that the Sun.s rays are perpen.icular to the pan.l surface. A pyran.m.ter is in.talled on.each pan.l, recordin. the tilted global solar irradian.e, stored by usin. a data logger. The an.lysis of the data obtain.d shows a 33% solar en.rgy gain.on.an.an.ual basis for the m.vin. pan.l (2780 versus 2088 kWh/m. on.the fixed pan.l). m.re im.ortan.ly, in.Jun., when.the en.rgy dem.n. in.Bahrain.is elevated due to the in.reased residen.ial coolin. loads, the solar en.rgy received by the m.vin. pan.l is 54.7% higher com.ared with that of the fixed pan.l. On.a percen.age basis, the in.rease in.solar en.rgy from.the m.vin. pan.l is profoun. in.the early m.rn.n. an. late even.n. hours. m.reover, the reduction.in.the solar en.rgy received by the fixed pan.l from.m.y to Jun. does n.t appear in.the m.vin. pan.l because of the adjustable orien.ation.of the latter. Throughout the year, the m.an.daily solar power varies between.0.37 an. 0.56 kW/m. for the fixed pan.l, an. 0.45 an. 0.70 kW/m. for the m.vin. pan.l. In.win.er, solar en.rgy fluctuation. are elevated due to erratic weather con.ition. that presen. a peak stan.ard deviation.of 28% of the correspon.in. m.an. The data presen.ed are useful for poten.ial solar in.estm.n.s in.Gulf coun.ries. Tilted global solar irradian.e data are m.asured an. an.lysed for a period of 1 year on.the cam.us of Bahrain.Polytechn.c, Kin.dom.of Bahrain. from.both a fixed photovoltaic pan.l an. a m.vin. on. via a two-axis solar tracker. Graphical Abstract

关键词： tilted solar irradian.e ren.wable en.rgy solar trackin. photovoltaic Gulf Cooperation.Coun.il Coun.ries SUn.TRACKIn. En.RGY SYSTEm. PAn.LS WORLD

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Study of boun.ary layer characteristics durin. the lan.fallin. of a n.sarga cyclon.

引用

TROPICAL CYCLOn. RESEARCH An. REVIEW 2024年第2期13卷 55-71页

作者： Pawar, Ran. P. Priyadarshin., Prajn. Dharm.raj, T. n.de, Dada P. Patil, m.hen.ra n. Patil, Om.ar m. Victor, n. Jen. Pawar, Sam.haji m. Kan.se, D. G. Pawar, Sun.l D. In.ian.In.t Trop m.teorol Minist Earth Sci Pune Maharashtra India Bharati Vidyapeeths Dr Patan.rao Kadam.m.havidya Dept Phys Sangli India IIG KSK Geomagnet Res Lab Allahabad Uttar Pradesh India San.ay Ghodawat Un.v Kolhapur Dept Phys Kolhapur India

On. of the m.st im.ortan. param.ters in.m.teorology is the m.an.win. pro fi le in.the tropical cyclon. boun.ary layer. The vertical pro fi le of win. speed an. win. direction.were m.asured durin. the period of the n.sarga cyclon. from.m.y 31st, 2020, to Jun. 5th, 2020, usin. the n.wly in.talled Phased Array Doppler Sodar system.at the Cen.er for Space an. Atm.spheric Scien.e (CSAS), San.ay Ghodawat Un.versity, Kolhapur (16.74 degrees n. 74.37 degrees E; n.ar In.ia ' s western.coast). Our an.lysis revealed that the m.xim.m.m.an.win. speed was 17 m.s on.Jun. 3, 2020, at 10:00 IST. It also shows the chan.e in.win. direction.from.southwest to southeast on.Jun. 2 an. 3, 2020. Daily high-resolution.rean.lysis data in.the dom.in. 0 - 25 degrees n. 65 - 110 degrees E, durin. the period from.m.y 31st to Jun. 5th, 2020, revealed the variation.of the atm.spheric pressure of the n.sarga cyclon. from.1000 to 1008 hPa, sea surface tem.erature (SST) between.30 degrees C an. 31 degrees C, outgoin. lon.wave radiation.(OLR) between.100 an. 240 Wm.2 , win. speed between.3 an. 15 m.s, an. low values of vertical win. shear (VWS) were observed to the n.rth of n.sarga track. These observation. m.y provide m.re in.ights for the study of boun.ary layer turbulen.e durin. cyclon.c activities. (c) 2024 The Shan.hai Typhoon.In.titute of Chin. m.teorological Adm.n.stration. Publishin. services by Elsevier B.V. on.behalf of KeAi Com.un.cation.Co. Ltd. This is an.open.access article un.er the CC BY licen.e (http://***/licen.es/by/4.0/).

关键词： Phased Array Doppler Sodar Tropical cyclon. Atm.spheric boun.ary layer Vertical turbulen.e in.en.ity VERTICAL WIn. SHEAR TROPICAL CYCLOn.S SODAR OBSERVATIOn. GRAVITY-WAVES PERSPECTIVES TEm.ERATURE In.En.ITY m.n.OOn BEn.AL BAY

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

m.gn.tic,dielectric an. electrical m.dulus of Ce^(3+) doped cobalt-m.gn.sium.ferrite n.n.particles

引用

Journ.l of Rare Earths 2024年第2期42卷 373-382,I0005页

作者： n.m.Basfer Han.a Alm.gham.i Departm.n. of Physics Umm AL-Qura UniversityMakkahSaudi Arabia Physics Departm.n. College of Science and ArtKing Abdulaziz UniversityPOB344Rabigh291Saudi Arabi

In.this work,the m.gn.tic,dielectric properties an. electric m.dulus of Ce^(3+) substituted cobaltm.gn.sium.Co_(0.7)m._(0.3)Ce_(x)Fe_(2-x)O_4)(labeled as Cm.F) ferrite n.n.particles were in.estigated in.*** m.gn.tization.decreases from.50.05 to 34.87 em./g for further substitutin. Ce^(3+) ***,coercivity in.reases from.738.22 Gs for the Cm.FO sam.le to 912.10 Gs for the Cm.F2 sam.le,then.decreases m.n.ton.cally to 762.1 Gs for the Cm.F5 *** cerium.con.en. an. particle size play im.ortan. roles in.con.rollin. the m.gn.tization.an. coercivity of the Cm.F *** Cm.F n.n.ferrites are suitable for m.crowave application. sin.e their high-frequen.y respon.e ran.es from.7.72 to 11.07 *** Cm.F n.n.ferrites' dielectric param.ter dispersion.exhibits n.rm.l *** pristin. Co-m. n.n.ferrite on.y has ε' value of 28.25,but the n.n.ferrite m.m.2 has ε' value of365.03,with an.en.an.in. ratio of 1192%.The con.uction.m.chan.sm.of the m.m. n.n.ferrites was determ.n.d by fittin. the σ_(ac) results via the Jon.cher power *** 653 K,large polaron.tun.ellin. is thought to be respon.ible for this con.uction.process,which is followed by electron.barrier hoppin. at higher ***-Cole diagram. at differen. tem.eratures,assurin. the con.ribution. of the grain. an. their boun.aries at lower tem.eratures(653 K) an. on.y the grain. at higher *** on.our results,the Cm.F n.n.ferrites hold m.gn.tic an. sem.con.uctin. n.ture,which can.be used in.m.gn.tic devices an. dielectrics in.lower-frequen.ies or con.uctors in.higher-frequen.ies.

关键词： n.n.ferrites Rare earth ion. m.gn.tic properties Dielectric param.ters Im.edan.e spectroscopy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

First-prin.iples calculation. to in.estigate structural,electron.c,m.gn.tic,optical an. therm.dyn.m.c properties of RE_(2)Rh_(3)Ge(RE=Pr,Sm.

引用

Journ.l of Rare Earths 2024年第7期42卷 1385-1393,I0007页

作者： A.Ezaier R.m.srour m.Ham.doun.J.Kharbach A.Rezzouk A.Hourm.tallah n.Ben.akour K.Bouslykhan. Laboratory of Solid Physics Faculty of Sciences Dhar El MehrazSidi Mohamed Ben Abdellah UniversityBP 1796FezMorocco Equipe de Physique du Solide LaboratoiresLIPIEcole Normale SupérieureBensoudaFèsMorocco

In.this paper,we an.lyzed the physical characteristics of the tern.ry alloys RE_(2)Rh_(3)Ge(RE=Pr an. Sm.usin. the first prin.iples calculation.based on.fun.tion.l den.ity theory in.egrated in.the Wien.k *** calculated form.tion.en.rgies of Pr_(2)Rh_(3)Ge an. Sm.(2)Rh_(3)Ge are−5.3827 an.−5.2782 eV/atom.respectively,showin. that these alloys m.y exist *** results of the ban. structure an. den.ity of states in.icate that all of the com.oun.s tested are m.gn.tic m.tals,an. their m.gn.tism.is m.stly related to the con.ribution.of Pr an. Sm.*** total m.gn.tic m.m.n.s of Pr_(2)Rh_(3)Ge an. Sm.(2)Rh_(3)Ge are 4.07245 an. 11.16161μB/f.u,*** param.ters such as heat capacity at con.tan. pressure,en.ropy,Debye tem.erature,lattice volum.,com.ressibility coefficien.s,an. Grün.isen.param.ter alloys were calculated usin. the Gibbs algorithm.an. studied in.depth over a large tem.erature ran.e of 0-900 *** Debye tem.erature in.reases with in.reasin. pressure an. decreases with decreasin. ***,the Debye tem.eratures calculated at p=0 GPa an. T=300 K are equal to be 342 an. 322 K for Pr_(2)Rh_(3)Ge an. Sm.(2)Rh_(3)Ge,*** optical characteristics such as the real an. im.gin.ry portion. of the dielectric fun.tion.the absorption.coefficien.,the en.rgy-loss fun.tion.an. the refractive in.ex were in.estigated an. discussed in.m.re depth.

关键词： m.gn.tic m.tals Fun.tion.l den.ity theory Den.ity of states m.gn.tic m.m.n. Optical an. therm.dyn.m.c properties Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Direct m.crowave leachin. con.ition. of rare earth elem.n.s in.fluorescen. wastes

引用

Journ.l of Rare Earths 2024年第6期42卷 1165-1174,I0007页

作者： A.Bilen.B.Birol m.n.Saridede S.S.Kaplan.m.S.Son.0}z Departm.n. of m.tallurgical an. m.terials En.in.erin. Yildiz Technical UniversityIstanbulTurkey Departm.n. of Chem.cal En.in.erin. an. m.terials Scien.e Stevens Institute of TechnologyNew JereyUSA Departm.n. of m.tallurgical an. m.terials En.in.erin. Istanbul Technical UniversityIstanbulTurkey

The lum.n.scen. phosphor powder in.the fluorescen. lam. con.titutes 2%of the lam.’s *** can.be m.n.ion.d that fluorescen. wastes are a crucial raw m.terial to produce rare earth *** the presen. study,m.crowave leachin. process was con.ucted to dissolve rare earth elem.n.s yttrium.Y),europium.Eu),an. rem.in.n. rare earth elem.n.s(REEs)presen. in.the phosphor powder of the fluorescen. *** the yields were *** the m.crowave leachin. process,the effects of the tem.erature(80-160℃),acid type(hydrochloric acid(HCl),n.tric acid(Hn._(3)),sulphuric acid(H_(2)SO_(4))),acid con.en.ration.0.5-6 m.l/L),solid to liquid ratio(0.1:10-0.5:10)an. reaction.tim.(5-90 m.n.param.ters on.leachin. efficien.ies of varyin. rare earth elem.n.s an. calcium.were *** highest yield was obtain.d in.the direct m.crowave leachin. of fluorescen. waste with the experim.n.al con.ition. of 6 m.l/L HCl,160℃,0.1:10 solid-to-liquid ratio(S:L),an. 90 *** en.rgy calculation. were m.de,an. kin.tic m.dels of the reaction. were obtain.d,an. it is observed that Y an. Eu dissolution.is diffusion.con.rolled,on.the other han.,lan.han.m.La),cerium.Ce),an. terbium.Tb)were exam.n.d to be chem.cal reaction.***,calcium.Ca)an. gadolin.um.Gd)seem.coheren. with the m.xed ***,m.them.tical m.dels of all experim.n.al studies are created with the respon.e surface Box-Behn.en.m.thod an. the correlation.coefficien.s of all the m.dels are over 90%.

关键词： Rare earth elem.n.s(REEs) Direct m.crowave leachin. Fluorescen. waste Kin.tic m.dels Respon.e surface m.thod

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

EDSUCh:A robust en.em.le data sum.arization.m.thod for effective m.dical diagn.sis

引用

Digital Com.un.cation. an. n.tworks 2024年第1期10卷 182-189页

作者： m.hiuddin.Ahm.d A.n.m.Bazlur Rashid School of Scien.e Edith Cowan UniversityPerthAustralia

Iden.ifyin. rare pattern. for m.dical diagn.sis is a challen.in. task due to heterogen.ity an. the volum. of *** sum.arization.can.create a con.ise version.of the origin.l data that can.be used for effective *** this paper,we propose an.en.em.le sum.arization.m.thod that com.in.s clusterin. an. sam.lin. to create a sum.ary of the origin.l data to en.ure the in.lusion.of rare *** the best of our kn.wledge,there has been.n. such techn.que available to augm.n. the perform.n.e of an.m.ly detection.techn.ques an. sim.ltan.ously in.rease the efficien.y of m.dical *** perform.n.e of popular an.m.ly detection.algorithm. in.reases sign.fican.ly in.term. of accuracy an. com.utation.l com.lexity when.the sum.aries are ***,the m.dical diagn.sis becom.s m.re effective,an. our experim.n.al results reflect that the com.in.tion.of the proposed sum.arization.schem. an. all un.erlyin. algorithm. used in.this paper outperform. the m.st popular an.m.ly detection.techn.ques.

关键词： Data sum.arization En.em.le m.dical diagn.sis Sam.lin.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：