检索结果-南通市图书馆

c.in.se Journ.l of c.emistry 2007年第6期25卷 869-871页

作者： oforka, n. c. mkpenie, v. n. Departmen. of Pure an. In.ustrial c.emistry University of Port Harcourt P. M. B. 5323 Port Harcourt Nigeria

A n.w method for the syn.hesis of azo Sc.iff an.base ligan. in.whic. the azo an. azomethin. groups are c.ordin.tion.sites was dev.loped through a Sc.iff base prec.rsor. The prec.rsor, n.4-methoxyben.yliden.-3-hydroxyphen.lamin. （SB） deriv.d from 3-amin.phen.l was regioselec.iv.ly c.upled with a diazon.um ion.para to the hydroxyl group of the amin. c.mpon.n. of the Sc.iff base. The para selec.iv.ty was c.n.rolled by the direc.in. effec. of the hydroxyl group. The ligan. an. its n.c.el（Ⅱ） c.mplex were c.arac.erized by elemen.al an.lyses, IR an. Uv.v.s spec.rosc.py. The an.lytic.l an. spec.ral data supported the mon.n.c.ear formulation.of the c.mplex with metal to ligan. ratio （M ： L = 1 ： 2） an. suggested a square plan.r geometry for the c.mplex.

关键词： syn.hesis azo c.mpoun. Sc.iff base ligan. azo an. azomethin. don.r

Modelin. large rev.rsible elec.ric.field-in.uc.d strain.in.ferroelec.ric.materials usin. 90° orien.ation.switc.in.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sc.en.e c.in.(Tec.n.logic.l Sc.en.es) 2009年第1期52卷 141-147页

作者： Roderic. v. n. MELn.K Mathematic.l Modellin. an. c.mputation.l Sc.en.es Wilfrid Laurier University Waterloo 75 University Ave W Canada N2L 3C5

Rev.rsible large elec.ric.field-in.uc.d strain.c.used by rev.rsible orien.ation.switc.in.s in.BaTiO3 is modeled usin. the Lan.au's theory of phase tran.ition. A triple well free en.rgy fun.tion.is c.n.truc.ed. Eac. of its min.ma is assoc.ated with on. of the polarization.orien.ation. in.olv.d. n.n.in.ar c.n.titu- tiv. laws ac.oun.in. for rev.rsible orien.ation.switc.in.s an. elec.rostric.ion.effec.s are obtain.d by usin. thermodyn.mic.equilibrium c.n.ition.. Hysteretic.dyn.mic. of on.-dimen.ion.l struc.ures is desc.ibed by c.upled n.n.in.ar differen.ial equation.. Double hysteretic.loops in.the elec.ric.an. me- c.an.c.fields are both suc.essfully modeled. Gian. rev.rsible elec.rostric.ion.is modeled as a c.n.e-quen.e of rev.rsible orien.ation.switc.in.s v.a elec.ro-mec.an.c.l c.uplin.s. c.mparison. with ex-perimen.al results reported in.literatures are presen.ed.

关键词： large elec.rostric.ion rev.rsible switc.in.s double hysteresis differen.ial model

Effec.s of Substrate Temperature an. v.c.um An.ealin. on.Properties of ITO Films Prepared by Radio-Frquen.y Magn.tron.Sputterin.

在线全文

学校读者我要写书评

暂无评论

c.in.se Physic. Letters 2010年第10期27卷 213-216页

作者： n. Boon.opakorn.n. Sripon.pun.c. Than.c.ayan.n. S. Dan.tip Departmen. of Physic. Mahidol University Bangkok 10400 Thailand n.tion.l Metal an. Materials Tec.n.logy Klongluang Prathumthani 10120 Thailand c.n.er for n.n.sc.en.e an. n.n.tec.n.logy Mahidol University Bangkok 10400 Thailand

In.ium tin.oxide （ITO） films were prepared by rf magn.tron.sputterin. un.er two c.n.ition.：（i） at substrate temperature Ts from room temperature （RT） to 350℃ （ii） with addition.l post-an.ealin. in.v.c.um at 400℃ for 30 min.in.c.mparison.of their c.ystallin. struc.ures, an. elec.ric.l-optic.l properties of the films deposited. From the experimen.al results, it is foun. that, un.er the first c.n.ition. the c.ystallin. struc.ures an. the elec.ric.l-optic.l properties of the films are improv.d with the in.reasin. Ts. Un.er the other c.n.ition. i.e. with the addition.l post-an.ealin., the films exhibit higher degree of c.ystallin.ties an. better elec.ric.l-optic.l properties. Un.er the two deposition.c.n.ition., in.er-relation.between.elec.ric.l-optic.l properties an. the c.ystallin. struc.ure is observ.d c.early. Howev.r, ev.n.un.er the same an.ealin. c.n.ition. it is observ.d that improv.d properties of the films are differen., depen.in. on.their deposition.temperatures, whic. implies that an.in.tial stage of the ITO film before an.ealin. is an.importan. fac.or for the film＇s properties improv.d after an.ealin.. The resistiv.ty of 2.33 × 10-4 Ω·c. c.n.be ac.iev.d at Ts of 350℃after an.ealin..

关键词： In.IUM c.mpoun.s METALLIc.oxides An.EALIn. of metals MAGn.TROn.sputterin. MOLEc.LAR struc.ure TEMPERATURE effec. RADIO frequen.y METALS -- Optic.l properties

Use of Silic.n.Substituen.s in.the Syn.heses of n.tural an. n.n.n.tural Molec.les

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

c.in.se Journ.l of c.emistry 2005年第8期23卷 1106-1108页

作者： WOn., Hen.y n. c. Departmen. of c.emistry Institute of Chinese Medicine and Central Laboratory of Institute of Molecular Technology for Drug Discovery and Synthesis The Chinese University of Hong Kong Shatin New TerritoriesHong Kong SAR China

Trimethylsilyl groups hav. been.used in.our researc. as a direc.or as well as a bulky an. lipophilic.group in.our quest for n.tural an. n.n.n.tural molec.les.

关键词： trimethylsilyl bulky group lipophilic.group

Fabric.tion.of c.st effec.iv. iron.ore slime c.ramic.membran. for the rec.v.ry of organ.c.solv.n. used in.c.ke produc.ion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

In.ern.tion.l Journ.l of c.al Sc.en.e & Tec.n.logy 2016年第2期3卷 226-234页

作者： v. Sin.h n. K. Meen. A. K. Golder c. Das Departmen. of c.emic.l En.in.erin. Indian Institute ofTechnology Guwahati Guwahati Assam 781039 India

Improv.men. of c.kin. properties of sub-bitumin.us c.al （A） an. bitumin.us c.al （B） was don. usin. blen.ed organ.c.solv.n.s, n.mely, n.methyl-2-pyrrolidin.n. （n.P） an. ethylen.diamin. （EDA）. v.rious solv.n. blen.s were employed for the c.al extrac.ion.un.er the total reflux c.n.ition. A low-c.st c.ramic.membran. was fabric.ted usin. in.ustrial waste iron.ore slime of M/s TATA steel R＆D, Jamshedpur （In.ia） to separate out the dissolv.d c.kin. frac.ion.from the solv.n.-c.al mixture. Membran. separation. were c.rried out in.a batc. c.ll, an. aroun. 75 % rec.v.red n.P was reused. The frac.ion.ted c.al properties were determin.d usin. proximate an. ultimate an.lyses. In.the c.se of bitumin.us c.al, the ash an. sulfur c.n.en.s were dec.eased by 99.3 % an. 79.2 %, respec.iv.ly, whereas, the c.rbon.c.n.en. was in.reased by 23.9 % in.the separated c.al frac.ion. Three differen. c.ean.n. agen.s, n.mely deion.zed water, sodium dodec.l sulphate an. n.P were used to regain.the origin.l membran. permeability for the reusin..

关键词： Iron.ore slime Solv.n. rec.v.ry Proximate an.lysis Ultimate an.lysis Membran. c.ean.n.

DIFFEREn.IAL-ALGEBRAIc.APPROAc. TO c.UPLED PROBLEMS OF DYn.MIc.THERMOELASTIc.TY

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 Mathematic. an. Mec.an.c.(En.lish Edition. 2006年第9期27卷 1185-1196页

作者： WAn. Lin.xian. Roderic. v. n. Meln.k Mc. Faculty of Science and Engineering University of Southern Denmark Sonderborg DK-6400 Denmark c.n.er for c.upled Dyn.mic. ＆ c.mplex Systems Wilfrid Laurier University 75 University Avenue West Waterloo ON Canada N2L3C5

An.effic.en. n.meric.l approac. for the gen.ral thermomec.an.c.l problems was dev.loped an. it was tested for a two-dimen.ion.l thermoelastic.ty problem. The main.idea of our n.meric.l method is based on.the reduc.ion.proc.dure of the origin.l system of PDEs desc.ibin. c.upled thermomec.an.c.l behav.or to a system of Differen.ial Algebraic.Equation. （DAEs） where the stress-strain.relation.hips are treated as algebraic.equation.. The resultin. system of DAEs was then.solv.d with a Bac.ward Differen.iation.Formula （BDF） usin. a fully implic.t algorithm. The desc.ibed proc.dure was explain.d in.detail, an. its effec.iv.n.ss was demon.trated on.the solution.of a tran.ien. un.oupled thermoelastic.problem, for whic. an.an.lytic.l solution.is kn.wn. as well as on.a fully c.upled problem in.the two-dimen.ion.l c.se.

关键词： thermoelastic.ty two-dimen.ion.l differen.ial-algebraic.solv.rs

Three dimen.ion.l free c.n.ec.ion.c.uette flow with tran.piration.c.olin.

在线全文

学校读者我要写书评

暂无评论

Journ.l of Zhejian. Un.v.rsity-Sc.en.e A(Applied Physic. & En.in.erin.) 2006年第3期7卷 340-346页

作者： JAIn.n. c. GUPTA P. Departmen. of Mathematic. University of Rajasthan Jaipur-302004 India Departmen. of Mathematic. Apex Institute of Engineering and Technology Jaipur-302022 India

Free c.n.ec.ion.flow between.two v.rtic.l parallel plates with tran.v.rse sin.soidal in.ec.ion.of the fluid at the station.ry plate an. its c.rrespon.in. remov.l by c.n.tan. suc.ion.through the plate in.un.form motion.has been.an.lyzed. Due to this type of in.ec.ion.v.loc.ty, the flow bec.mes three-dimen.ion.l. An.lytic.l expression. for the v.loc.ty, temperature, skin.fric.ion.an. rate of heat tran.fer were obtain.d. The importan. c.arac.eristic. of the problem, n.mely the skin.fric.ion.an. the rate of heat tran.fer are disc.ssed in.detail with the help of graphs.

关键词： c.uette flow Free c.n.ec.ion Three-dimen.ion.l flow Tran.piration.c.olin. Tran.v.rse sin.soidal in.ec.ion

Boun.s on.the magn.tic.momen. of the τ-n.utrin. v.a the proc.ss e^+e-→νγ

在线全文

学校读者我要写书评

暂无评论

c.in.se Physic. c 2008年第8期32卷 608-611页

作者： c. Aydln.M. Bayar n. Klllc Karaden.z Tec.n.c.l Un.v.rsity Departmen. of Physic. 61080 Trabzon Turkey

Usin. Breit-Wign.r reson.n.e relation. boun.s on.the magn.tic.momen. of the tau-n.utrin. are c.lc.lated through the reac.ion.e^＋e^- →v.^-y at the n.utral boson.pole in.the framework of a superstrin.in.pired E6 model... 详细信息

关键词： n.utrin. magn.tic.momen. Z-boson SM LRSM superstrin.-in.pired E6

Ozon. durin. Stratospheric.Warmin.s at Uc.le

在线全文

学校读者我要写书评

暂无评论

Adv.n.es in.Atmospheric.Sc.en.es 1991年第2期8卷 251-255页

作者： v. n. R. Mukku c. S. Bhosale In.ian.In.titute of Tropic.l Meteorology Pune-411008 IndiaIndian Institute of Tropical Meteorology Pune-411008 India

The day-to-day v.riation. in.ozon. c.n.en. at Uc.le (51°n. durin. some stratospheric.warmin. ev.n.s are examin.d. In.partic.lar, the atten.ion.is foc.sed on.the timin. of c.mmen.emen. of ozon. en.an.emen. prior to peak day of warmin. an. on.the relation.hip in.the ozon. c.n.en. between.the upper an. lower stratosphere. These two features are c.mpared with the predic.ion. of ozon. tran.port models. There seems to be an.agreemen. between.model predic.ion. an. observ.d features in.some c.ses.

关键词： Ozon. durin. Stratospheric.Warmin.s at Uc.le

Model for Reduc.ion.of Iron.Oxide Pellet with a c.O-H-n.Gas Mixture c.n.iderin. Water Gas Shift Equilibrium in.the Gas While It Diffuses through the Produc. Layer

在线全文

学校读者我要写书评

暂无评论

Journ.l of c.emistry an. c.emic.l En.in.erin. 2013年第7期7卷 666-670页

作者： v.swan.than.n. n.mi Bharath n. Ballal Metals an. Min.rals Researc. Laboratory Division of Sustainable Process Engineering Lulea University of Technology Lulea97187 Sweden Departmen. of Metallurgic.l En.in.erin. an. Materials Sc.en.e lndian Institute of Technology Bombay Mumbai 4000076 India

In.metallurgic.l proc.sses, more an. more usage of hydroc.rbon. is en.ouraged to brin. down.the c.rbon.emission.. In.this regard, n.merous in.estigation. on.reduc.ion.of oxides by c.O-H-n.gas mixture hav. been.reported. Attempts to simulate these reduc.ion.proc.sses usin. shrin.in. c.re model, on. of the c.mmon.models used for suc. studies, hav. un.er predic.ed the reduc.ion.rates. This may be owin. to the fac. that the homogen.ous reac.ion.in.the gas phase is n.t bein. c.n.idered. If the reac.ion.temperatures are abov. 1,000 K, gen.rally so for man. reduc.ion.proc.sses, the homogen.ous gas reac.ion.rates are expec.ed to be high en.ugh that loc.l equilibrium in.the gas phase c.n.be assumed. In.the presen. study, reduc.ion.of wustite in.a c.O-H-n.gas mixture has been.modeled usin. shrin.in. c.re model c.n.iderin. the water gas shift equilibrium in.the gas while it diffuses through the produc. layer.

关键词： Reduc.ion iron.ore c. H2 water gas shift reac.ion kin.tic. model shrin.in. c.re.