检索结果-南通市图书馆

Cracks Propagat.on as a Funct.on of Grain Size Variant. on Nanocryst.lline Mat.rials’ Yield St.ess Produced b. Accumulat.ve Roll-b.nding

引用

Advances in Mat.rials Physics and Chemist.y 2017年第2期7卷 58-69页

作者： P. b. Sob.A. A. Alugongo t. b. tengen Depart.ent.f Mechanical Engineering Faculty of Engineering and Technology Vaal University of Technology Vanderbijlpark South Africa Depart.ent.of Indust.ial Engineering and Operat.ons Management Faculty of Engineering and Technology Vaal University of Technology Vanderbijlpark South Africa

Cracks are usually ob.erved at.t.e edge of mat.rials deformed b. accumulat.ve roll b.nding from convent.onal mat.rials t. nanost.uct.re mat.rials. t.e ob.erved cracks t.en propagat. in t.e mat.rials during grain refinement. t.e cracks propagat.on affect. t.e yield st.ess and t.e effect.ve fract.re energy of nanocryst.lline mat.rials. In t.is st.dy, t.e impact. of crack propagat.on when measured as a funct.on of grain size variant. on nanocryst.lline mat.rials’ yield st.ess are invest.gat.d for a mat.rial deformed b. accumulat.ve roll-b.nding. t.e st.dy employs experiment.l dat. and t.eoret.cal concept. of severe plast.c deformat.on and cracks processes in nanocryst.lline mat.rials. t.e current.st.dies also focus on nano-cracks t.at.will not.lead t. rapid mat.rials failure during grain refinement. t.e st.dy revealed t.at.crack propagat.on varied as a funct.on of grain size variant. during grain refinement. t.e st.dy also revealed t.at.nano-crack increased during t.e deformat.on of nanost.uct.red mat.rials. t.e st.dy also revealed t.at.t.e effect.ve fract.re energy decreased as grain refinement.t.ok place. t.e st.dy revealed t.at.nanomat.rials yield st.ess decreased wit. t.e increase in effect.ve fract.re energy. t.e current.st.dy suggest. a t.eoret.cal model t.at.shows t.e generat.on of nanomat.rials cracks during grain refinement.as a funct.on of grain size variant.. In t.e model, t.e cracks propagat. on nanocryst.lline mat.rials due t. t.e compressive load applied t. a mat.rial. t.e model predict. t.at.t.e generat.on of cracks as funct.ons of grain size variant. impact. t.e energy level in nanocryst.lline mat.rials.

关键词： Nanost.uct.re Grain Size Variant. St.ess Crack Energy

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

Compact.hain:an efficient.st.t.less chain for Ut.O-model b.ockchain

引用

Front.ers of Comput.r Science 2024年第2期18卷 167-179页

作者： b.Swaroopa REDDY t.Uday Kiran REDDY Depart.ent.of Elect.ical Engineering Indian Institute of Technology HyderabadHyderabadTelangana 502285India

In t.is work,we propose a st.t.less b.ockchain called Compact.hain,which compact. t.e ent.re st.t. of t.e Ut.O(Unspent.t.ansact.on Out.ut.b.sed b.ockchain syst.ms int. t.o RSA *** first.accumulat.r is called t.ansact.on Out.ut.t.O)commit.ent.which represent. t.e t.O *** second one is called Spent.t.ansact.on Out.ut.St.O)commit.ent.which represent. t.e St.O *** t.is work,we discuss t.ree algorit.ms:(i)t. updat. t.e t.O and St.O commit.ent. b. t.e *** miner also provides t.e proofs for t.e correct.ess of t.e updat.d commit.ent.;(ii)t. prove t.e t.ansact.on’s validit. b. providing a memb.rship wit.ess in t.O commit.ent.and non-memb.rship wit.ess against.St.O commit.ent.for a coin b.ing spent.b. a user;(iii)t. updat. t.e wit.ess for t.e coin t.at.is not.yet.spent.t.e experiment.l result. evaluat. t.e performance of t.e Compact.hain in t.rms of t.me t.ken b. a miner t. updat. t.e commit.ent. and t.me t.ken b. a validat.r t. verify t.e commit.ent. and validat. t.e *** compare t.e performance of Compact.hain wit. t.e exist.ng st.t.-of-t.e-art.works on st.t.less *** shows a reduct.on in commit.ent. updat. complexit. and t.ansact.on wit.ess size which int.rn reduces t.e mempool size and propagat.on lat.ncy wit.out.compromising t.e syst.m t.roughput.t.ansact.ons per second(t.S)).

关键词： st.t.less b.ockchain RSA Accumulat.r St.O commit.ent t.O commit.ent Ut.O Non-int.ract.ve Proof of Exponent.at.on(NI-PoE) t.ansact.ons per second(t.S)

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

A Review on t.chnologies for t.e Use of CO2 as a Working Fluid in Refrigerat.on and Power Cycles

引用

Energy and Power Engineering 2024年第6期16卷 217-256页

作者： Orelien t. b.upda Hyacint.e D. t.ssemo Isidore b. Nkounda Fongang Francklin G. Nyami Frederic Lont.i t.omas Djiako Lab.rat.ry of Energy Higher National Polytechnic School of Douala University of Douala Douala Cameroon Inst.t.t.Ucac-Icam Douala Cameroon Depart.ent.of Energy and Mechanical Engineering ISTA-IUG University of Ngaoundere Ngaoundere Cameroon

t.e use of carb.n dioxide as a working fluid has b.en t.e sub.ect.of ext.nsive st.dies in recent.years, part.cularly in t.e field of refrigerat.on where it.is at.t.e heart.of research t. replace CFC and HCFC. It. t.ermodynamic propert.es make it.a fluid of choice in t.e efficient.use of energy at.low and medium t.mperat.res in engine cycles. However, t.e performance of t.anscrit.cal CO2 cycles weakens under high t.mperat.re and pressure condit.ons, especially in refrigerat.on syst.ms;On t.e ot.er hand, t.is disadvant.ge b.comes rat.er int.rest.ng in engine cycles where CO2 can b. used as an alt.rnat.ve t. t.e organic working fluid in small and medium-sized elect.ical syst.ms for low qualit. or wast. heat.sources. In order t. improve t.e performance of syst.ms operat.ng wit. CO2 in t.e field of refrigerat.on and elect.icit. product.on, research has made it.possib.e t. develop several concept., of which t.is art.cle deals wit. a review of t.e st.t. of t.e art. followed b. analyzes in-dept. and crit.cal of t.e various development. t. t.e most.recent.modificat.ons in t.ese fields. Det.iled discussions on t.e performance and t.chnical charact.rist.cs of t.e different.evolut.ons are also highlight.d as well as t.e fact.rs affect.ng t.e overall performance of t.e syst.ms st.died. Finally, perspect.ves on t.e fut.re development.of t.e use of CO2 in t.ese different.cycles are present.d.

关键词： Refrigerat.on Cycle Power Cycle Syst.m Performance t.anscrit.cal CO2 Cycles Working Fluid

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

Lab.rat.ry evaluat.on of t.xicit. of select.d insect.cides against.egg and larval st.ges of cot.on pink b.llworm, Pect.nophora gossypiella (Saunders) (Lepidopt.ra: Gelechiidae)

引用

Journal of Cot.on Research 2024年第1期7卷 15-28页

作者： b.SNOOR Ab.ishek V. WADASKAR R.M. FAND b.b.saheb.b. t.Mb. V.J. PILLAI t. MAHULE D.J. NAGRARE V.S. PRASAD Y.G. Ent.mology Sect.on College of Agriculture(Dr.Panjabrao Deshmukh Krishi Vidyapeeth)Nagpur 440001MaharashtraIndia Indian Council of Agricult.ral Research-Cent.al Inst.t.t. for Cot.on Research Nagpur 441108MaharashtraIndia

b.ckground t.e crypt.c nat.re of pink b.llworm Pect.nophora gossypiella(Saunders)larvae enab.es it. reduced vul-nerab.lit. t. insect.cidal ***,t.e development.of resist.nce against.b.cillus t.uringiensis(b.0}t.xins posed a serious t.reat.t. t.ansgenic cot.on *** necessit.t.d det.rmining t.e crit.cal t.ming of spray applicat.ons on t.e cont.ol *** st.dy assessed t.e influence of egg age(freshly laid ***-day-old)and t.e loca-t.on of larvae(direct.y exposed t. t.e insect.cide residues on t.e b.ll rind *** inside t.e b.lls)on insect.cide cont.ol *** t.e result. revealed a significant.decrease in t.e ovicidal act.vit. of t.st.d insect.cides wit. an increase in t.e age of eggs from one day old t. t.ree days old(paired t.t.st.Pt.e larvae direct.y exposed t. t.e insec-t.cide residues on t.e b.ll rind were more suscept.b.e(>80%mort.lit.)t.an t.e larvae exposed aft.r t.ey had b.r-rowed inside t.e b.lls(t.lit.).t.e inhib.t.ry effect. of t.st.d insect.cides on development.l b.ology were more pronounced in t.e experiment.on pre-larval release insect.cide t.eat.ent.compared wit. insect.cide t.eat.ent.given post.larval release and ent.y inside t.e *** Egg age influences t.e insect.cide suscept.b.lit.,as does t.e larval locat.on,direct.y exposed vs b.r-rowed inside t.e *** eggs and t.e larvae t.at.had b.rrowed inside t.e green b.lls of cot.on were relat.vely less suscept.b.e t. t.e insect.cide *** t.xic effect. of insect.cides on egg and larval st.ges were primar-ily *** findings are significant.for devising a comprehensive st.at.gy for pink b.llworm management.on a sust.inab.e b.sis.

关键词： b.oefficacy Cot.on Insect.cides Pink b.llworm Pect.nophora gossypiella t.mings of spray

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

Clinical feat.res of gast.oesophageal reflux disease and erosive esophagit.s:Insight. from pat.ent. undergoing esophagogast.oduodenoscopy in resource-limit.d Et.iopia

引用

World Journal of Gast.oent.rology 2024年第34期30卷 3883-3893页

作者： Firehiwot.A Mengist.e Ab.t. b.Shewaye Ab.l t.t.samma Zekarias S Ayalew Depart.ent.of Int.rnal Medicine Addis Ababa UniversityAddis Ababa 1176Addis AbabaEthiopia Depart.ent.of Int.rnal Medicine Rheum Rheumatology and Internal Medicine Specialty ClinicAddis Ababa 1000Addis AbabaEthiopia Division of Gast.oent.rology and Hepat.logy Department of Internal MedicineAdera Medical and Surgical CenterAddis Ababa 1000Addis AbabaEthiopia

b.CKGROUND Gast.oesophageal reflux disease(GERD)is a common disease worldwide wit. varying clinical present.t.ons and risk *** dat. for Africa is lacking,b.t.an increasing t.end is expect.d due t. demographic and epidemiological *** endoscopic st.dies for general gast.oint.st.nal disorders have shown some pat.ent. wit. erosive esophagit.s(EE),no st.dies in Et.iopia have invest.gat.d t.e clinical charact.rist.cs,risk fact.rs,and severit. of GERD using esophagogast.oduodenoscopy(EGD).AIM t. assess t.e clinical feat.res of GERD in Et.iopian pat.ent. who underwent.EGD and det.rmine t.e severit. and risk fact.rs of *** We conduct.d a mult.cent.r,ret.ospect.ve cross-sect.onal st.dy of 221 pat.ent. diagnosed wit. GERD and endoscopic findings of EE at.t.auma Associat.d Severe Hemorrhage and Amniot.c Memb.ane St.m Cell b.t.een January 2019 and August.*** were collect.d from elect.onic medical records and phone call *** used descript.ve st.t.st.cs and b.nary logist.c regression analysis wit. SPSS version 26 t. ident.fy t.e associat.on b.t.een variab.es wit. a st.t.st.cal significance set.at.P valuet.e mean±SD age of t.e pat.ent. was 44.8(±15.9)years,wit. a male-t.-female rat.o of 1.6:*** most.commonly report.d sympt.m was epigast.ic pain(80.5%),followed b. heart.urn(43%).Los Angeles(LA)-A EE was diagnosed in 71.1%of pat.ent.,followed b. LA-b.14.9%),LA-C(7.7%),and LA-D(5.9%).Mult.variat. analysis showed t.at.age 50 or ab.ve,presence of b.eeding,and endoscopic findings of duodenit.s/duodenopat.y were significant.y associat.d wit. severe EE(Pt.ict.re and b.rret.’s esophagus were ob.erved in 4.5%and 1.36%of pat.ent. wit. EE,*** Most.of t.e pat.ent. had milder EE wit. fewer ***,severe EE was more prevalent.in older pat.ent. and t.ose wit. duodenit.s/duodenopat.y.

关键词： Gast.oesophageal reflux disease Erosive esophagit.s Hiat.l hernia Esophagogast.oduodenoscopy Heart.b.rn

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

EP Aquarii:A New Pict.re of t.e Circumst.llar Envelope

引用

Research in Ast.onomy and Ast.ophysics 2024年第3期24卷 83-105页

作者： Pham t.Nhung Do t.Hoai Pierre Darriulat.Pham t.an-Anh Pham N.Diep Nguyen b.Ngoc t.an t.t.ai Depart.ent.of Ast.ophysics Vietnam National Space CenterVietnam Academy of Science and Technology18Hoang Quoc VietNghia DoCau GiayHa Noivietnam

New analyses of earlier ALMA ob.ervat.ons of oxygen-rich AGb.st.r EP Aquarii are present.d,which complet. a previously pub.ished analysis and offer a different.int.rpret.t.on of t.e morpho-kinemat.cs of t.e circumst.llar *** b.rt. of t.e equat.rial densit. enhancement.EDE)is shown t. occur very close t. t.e st.r where evidence for rot.t.on has b.en *** t. t.e st.r and where out.lows have b.en ob.erved:t.eir int.ract.on wit. t.e gas of t.e nascent.EDE is seen t. play an import.nt.role in t.e development.of t.e wind and t.e evolut.on of it. radial velocit. from 8 t. 10 km s^(-1) on t.e polar symmet.y axis t.~2 km s^(-1) at.t.e *** implies complex morpho-kinemat.cs:making reliab.e int.rpret.t.ons wit. reasonab.e confidence is *** part.cular,it.quest.ons an earlier int.rpret.t.on implying t.e presence of a whit. dwarf companion orb.t.ng t.e st.r at.an angular dist.nce of -0″4 from it. *** proposes inst.ad an int.rpret.t.on in t.rms of a st.ndard mass eject.on associat.d wit. a shock wave leaving a void of emission in it. *** Doppler velocit. wings are seen t. consist.of t.o component.,t.e upper velocit. end of t.e glob.l wind,reaching ab.ve±12 km s^(-1),and an effect.ve line b.oadening,confined wit.in 200 mas from t.e cent.r of t.e st.r,reaching ab.ve±20 km s^(-1) and int.rpret.d as caused b. t.e pat.ern of shock waves result.ng from t.e int.ract.on b.t.een st.llar pulsat.on and convect.ve cell part.t.on.

关键词： st.rs AGb.and post.AGb.(st.rs) circumst.llar mat.er-radio lines st.rs

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

Inflow and out.low permeab.lit. t.st. in a very soft.clay under low st.esses

引用

Journal of Rock Mechanics and Geot.chnical Engineering 2024年第8期16卷 3270-3283页

作者： J.W.S.Vargas F.A.b.Danziger F.R.Lopes t.Lunne Federal Universit. of Rio de Janeiro Rio de JaneiroBrazil Norwegian Geot.chnical Inst.t.t. OsloNorway

In sit. inflow and out.low permeab.lit. t.st. wit. t.e b.t.prob. at.SarapuíII soft.clay t.st.sit. are present.d.A descript.on of t.e b.t.permeab.lit. t.st.is provided,discussing it. advant.ges and short.omings,especially in t.e case of very soft.clays under low *** pressures were monit.red during prob. inst.llat.on and were found t. b. slight.y lower t.an piezocone u2 pore pressures,consist.nt.wit. t.e posit.on of t.e *** role of filt.r t.p sat.rat.on was invest.gat.d aft.r t.e usual sat.rat.on procedure provided an unsat.sfact.ry pore pressure response during prob. *** show t.at.t.e vacuum sat.rat.on procedure provides adequat. response during inst.llat.on and increases t.e reliab.lit. of t.e coefficient.of permeab.lit. det.rminat.on in early *** inflow and out.low t.st. yielded similar result.,indicat.ng t.at.careful execut.on of t.e t.st.can lead t. good t.st.repeat.b.lit. regardless of t.e loading *** sequences of alt.rnat.d inflow and out.low t.st. have yielded similar result.,indicat.ng t.at.soil reconsolidat.on and filt.r clogging were negligib.e in t.e t.st. *** are present.d concerning t.e relat.onship b.t.een index paramet.rs and t.e in sit. coefficient.of permeab.lit. for SarapuíII clay,which plot.out.ide t.e range of exist.ng dat.b.ses.

关键词： Permeab.lit. t.st Soft.clay b.t.prob. Inflow and out.low t.st.

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

Genet.c Enhancement.of Indigenous Cowpea wit. Gamma-Ray Induced t.ait.Variat.on

引用

American Journal of Plant.Sciences 2024年第8期15卷 651-676页

作者： Mat.urin t.ergnin Dab.ré Minimassom Philippe Nikiéma Djib.il Yonli Safiat.u Sanna Wossoguim Josué Goub. Siéb.u Palé Hamidou t.aoré Joseph t. b. b.t.eno Varra Prasad Zacharia St.wart.Jan b. Middendorf Ab.ishek Rat.ore Anupama J. Hingane Unit.de Format.on et.de Recherches en Sciences et.t.chnologies Dpartement des Sciences de la Vie et de la Terre Universit Norbert ZONGO Koudougou Burkina Faso Inst.t.t.de lEnvironnement.et.de Recherches Agricoles (INERA) Ouagadougou Burkina Faso Depart.ent.of Agronomy Kansas State University Manhattan USA Cent.r for Agricult.re-Led Growt. b.reau for Resilience and Food Securit. Unit.d St.t.s Agency for Int.rnat.onal Development United States Agency for International Development Washington DC USA Int.rnat.onal Maize and Wheat.Improvement.Cent.r (CIMMYt. ICRISAT Campus Patancheru India Joint.FAO/IAEA Division of Nuclear t.chniques in Food and Agricult.re Depart.ent.of Nuclear Sciences and Applicat.ons Plant Breeding and Genetics Laboratory International Atomic Energy Agency (IAEA) Seibersdorf Vienna Austria

Product.on of cowpea (Vigna unguiculat. (L.) Walp.), a st.ple legume crop in Sub.Saharan Africa, faces challenges due t. b.ot.c and ab.ot.c const.aint.. Induced mut.genesis was deployed t. creat. genet.c variat.on in t.o cowpea variet.es (KVX396-4-5-2D and Moussa local). t.e radio-sensit.vit. t.st. led t. det.rme t.e let.al dose 50 (LD50) corresponding t. 230 Gy and 220 Gy for KVX396-4-5-2D and Moussa local variet.es, respect.vely. Dried seeds (M0) of each variet. were gamma-ray irradiat.d wit. LD50 − 50, LD50 and LD50 + 50. M1 seeds were advanced t. generat. M2, M3 and M4 mut.nt. using t.e single-seed-descent.met.od. M4 mut.nt.lines were evaluat.d in rain-fed condit.ons using a randomized complet. b.ock design t. assess phenot.pic differences. Dat. on seven qualit.t.ve and eleven quant.t.t.ve t.ait. were collect.d. t.e result. indicat.d t.at.t.e mut.t.on induced variab.lit. in t.ree qualit.t.ve t.ait.: in KVX 396-4-5-2D mut.nt.lines, wit. flower and seed color frequencies at.2.61% and 0.56% respect.vely, and pod dehiscence at.a frequency of 0.24%. While in Moussa local mut.nt., a pod color changed at.a frequency of 17%. ANOVA result. revealed significant.differences b.t.een mut.nt. of b.t. variet.es for all quant.t.t.ve t.ait., including phot.synt.et.c paramet.rs. Posit.ve correlat.ons were ob.erved b.t.een leaf diamet.r and 100-seed weight. and b.t.een b.anch numb.r and 100-seed weight. Hierarchical clust.ring revealed t.ree clust.rs among KVX 396-4-5-2D mut.nt. and six clust.rs among Moussa local mut.nt.. Early mat.rit. and high foliage were induced t.ait. in Clust.r 3 of KVX 396-4-5-2D mut.nt. while high hundred-seed weight.was induced in Clust.r 6 of Moussa local mut.nt..

关键词： Cowpea Mut.genesis Gamma Rays Radio-Sensit.vit. Phenot.ping

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

Why can some count.ies perform b.t.er in resolving some social prob.ems:A comparat.ve st.dy

引用

Economic and Polit.cal St.dies 2024年第3期12卷 250-266页

作者： Wilson X.b.Li t.na t.He Facult. of b.siness and Management BNU-HKBU United International CollegeZhuhaiChina

t.is st.dy explores t.e rat.onale why some count.ies fare b.t.er in resolving social prob.ems such as povert. and t.e COVID-19 *** simple model int.oduces t.e t.rm of resident.viab.lit. and point. out.t.at.t.e solut.on t. a social prob.em wit. a large rat.o of nonviab.e t. viab.e resident. requires t.e mob.lisat.on of more societ.l resources,and t.e affordab.e price rat.o of societ.l t. individual resources is det.rmined b. count.y charact.rist.cs such as t.e cult.ral b.ckground,polit.cal regime,ideology t.wards t.e free-market.mechanism,government.efficiency and social *** st.dy also makes b.t.een-count.y comparisons and conduct. preliminary regression analyses wit. cross-count.y dat.,and all t.e result. are consist.nt.wit. t.e model predict.ons on t.e relat.onship b.t.een count.y charact.rist.cs and count.y performances in fight.ng povert. and handling t.e COVID-19 pandemic.

关键词： Social prob.ems COVID-19 povert. eradicat.on viab.lit. b.t.een-count.y comparison

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

Efficient.guiding and focusing of int.nse laser pulse using periodic t.in slit.

引用

Mat.er and Radiat.on at.Ext.emes 2024年第4期9卷 29-39页

作者： L.Xu t.W.Huang K.Jiang C.N.Wu H.Peng P.C.hen R.Li H.b.Zhuo C.t.Zhou Shenzhen Key Lab.rat.ry of Ult.aint.nse Laser and Advanced Mat.rial t.chnology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Slit. have b.en widely used in laser-plasma int.ract.ons as plasma opt.cal component. for generat.ng high-harmonic light.and cont.olling laser-driven part.cle ***,we propose and demonst.at. t.at.periodic t.in slit. can b. regarded as a new b.eed of opt.cal element. for efficient.focusing and guiding of int.nse laser *** fundament.l physics of int.nse laser int.ract.on wit. t.in slit. is st.died,and it.is revealed t.at.relat.vist.c effect. can lead t. enhanced laser focusing far b.yond t.e pure diffract.ve focusing *** addit.on,t.e int.ract.on of an int.nse laser pulse wit. periodic t.in slit. makes it.feasib.e t. achieve mult.fold enhancement.in b.t. laser int.nsit. and energy t.ansfer efficiency compared wit. convent.onal *** result. provide a novel met.od for manipulat.ng ult.a-int.nse laser pulses and should b. of int.rest.for many laser-b.sed applicat.ons.

关键词： laser pulse int.nse

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：