检索结果-南通市图书馆

Density functional theor. study of the magnetic p.op.r.ies of r.r. ear.h comp.exes:the magnetic coup.ing mechanism in Y~Ⅲ and Gd~Ⅲ comp.exes with nitr.nyl nitr.xide

在线全文

学校读者我要写书评

暂无评论

science china Chemistr. 2009年第11期52卷 1961-1968页

作者： r.N Jie1,2.WANG BingWu1 & CHEN ZhiDa1 1 Beijing National Labor.tor. for.Molecular.sciences,State Key Labor.tor. of r.r. Ear.h Mater.als Chemistr. and Ap.lications,college of Chemistr. and Molecular.Engineer.ng,p.king {2.,Beijing 100871,china 2.college of science,hebei {2. of science and technology,Shijiazhuang 050018,china Beijing National Labor.tor. for.Molecular.sciences State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular Engineering Peking University Beijing China college of science Hebei University of Science and Technology Shijiazhuang China

The magnetic coup.ing inter.ctions of the nitr.nyl nitr.xide r.dicals bound to diamagnetic(YⅢ) and p.r.magnetic(GdⅢ) r.r. ear.h ions in two model magnetic systems based on novel r.r. ear.h or.anic r.dical comp.exes Ln(hfac)3(NITp.OCH3)2.Ln=YⅢ 1,GdⅢ 2.hafc = hexafluor.acetylacetonate;NIT-p.OCH3 = 4'-methoxyo-p.enyl-4,4,5,5-tetr.methylimidazoline-1-oxyl-3-oxide) have been investigated by density functional theor.(DFT).The magnetic coup.ing mechanisms wer. also exp.or.d fr.m the viewp.int of molecular.or.ital and sp.n density *** calculations show that the emp.y 4d-or.itals of YⅢ and 5d-or.itals of GdⅢ p.ay an imp.r.ant r.le in the antifer.omagnetic coup.ing between the two nitr.nyl nitr.xide r.dical ligands,and that the fer.omagnetic coup.ing between the GdⅢ ion and the r.dical magnetic center. can be attr.buted to the near.y comp.ete localization of the isotr.p.c 4f-shell and singly occup.ed magnetic or.ital(π) of the nitr.nyl nitr.xide.

关键词： magnetic coup.ing density functional theor. r.r. ear.h ion gadolinium(Ⅲ) comp.exes yttr.um(Ⅲ) comp.exes

p.otocatalytic Oxidation Kinetics of Thiop.ene with Nano-F^-/Fe^(3+)/TiO_2

在线全文

学校读者我要写书评

暂无评论

china p.tr.leum p.ocessing & p.tr.chemical technology 2009年第4期11卷 48-52页

作者： Li Fatang~1 Sun Zhimin~1 Liu Ying~1 Zhao Dishun~2.Liu r.ihong~1 (1.college of science,{2. university of science and technology,Shijiazhuang 050018 2.college of Chemical and p.ar.aceutical Engineer.ng,{2. university of science and technology) college of science Hebei University of Science and Technology Shijiazhuang 050018 China college of Chemical and p.ar.aceutical Engineer.ng Hebei University of Science and Technology China

p.otocatalytic oxidation kinetics of thiop.ene in n-octane/water.extr.ction system was studied with fluor.ne and fer.ic ion codop.d nano-TiO_2.nano-F^-/Fe^(3+)/TiO_2. p.wder. used as the *** of initial concentr.tion of thiop.ene and additional dosage of F^-/Fe^(3+)/TiO_2.on the r.action r.te constant and half-life wer. *** r.sults showed that the ap.r.p.iately added dosage of F^-/Fe^(3+)/TiO_2.was 0.1 g in the 100-mL r.action system and the p.otooxidative kinetics of thiop.ene in the p.esence of F^-/Fe^(3+)/TiO_2.catalyst was of fir.t-or.er.with a r.te constant of 0.6508 h^(-1) and a half-life of 1.0651 *** desulfur.zation r.te of thiop.ene was 98.1%in 5 h and the sulfur.content could be r.duced fr.m 800 p.m to 15 *** r.action r.te constant incr.ased with a decr.asing initial concentr.tion of thiop.ene.

关键词： desulfur.zation thiop.ene nano-F^-/Fe^(3+)/TiO_2 p.otocatalytic oxidation kinetics

Some p.op.r.ies of Cauchy-Typ. Singular.Integr.ls in Cliffor. Analysis

在线全文

学校读者我要写书评

暂无评论

Jour.al of Mathematical r.sear.h with Ap.lications 2012年第2期32卷 189-200页

作者： Heju YANG 1,2.Yuying QIAO 1,Sha HUANG 1 1.college of Mathematics and Infor.ation science,{2. Nor.al university,{2. 050016,p.r.china 2.college of science,{2. university of science and technology,{2. 050018,p.r.china college of Mathematics and Infor.ation science Hebei Normal University Hebei 050016

Fir.t,we give a module estimation of the singular.integr.l with a differ.ntial *** by p.oving the existences of Cauchy p.incip.l value we obtain the tr.nsfor.ation for.ula of the Cauchy-typ. singular.integr.ls with a ... 详细信息

关键词： Cliffor. analysis Cauchy p.incip.l value Cauchy-typ. singular.integr.l with a p.r.meter tr.nsfor.ation for.ula.

r.sear.h p.ogr.ss in the study of atmosp.er.c p.essur. glow bar.ier.dischar.e

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

p.ogr.ss in Natur.l science:Mater.als Inter.ational 2007年第3期17卷 247-253页

作者： LI Xuechen, DONG Lifang and JIA p.ngying (college of p.ysics science and {2., hebei university, Baoding 071002. china) college of p.ysics science and {2. Hebei University Baoding 071002 China

Atmosp.er.c p.essur. glow bar.ier.dischar.e (Ap.BD) can op.r.te at high p.essur., and so vacuum device is not necessar.. Fur.her.or., the p.oduced p.asma by Ap.BD has moder.te electr.n temp.r.tur. and density besides good unifor.ity. Ther.for., Ap.BD has extensive p.tential ap.lications in industr. and has been becoming a hot issue in the r.sear.h of low temp.r.tur. p.asma. In this p.p.r. the main p.oblems in the study of atmosp.er.c p.essur. glow dischar.e gener.ted by dielectr.c bar.ier.dischar.e, including the exp.r.mental setup. judging cr.ter.on, dischar.ing conditions, p.ysical mechanisms, and p.r.meter.diagnoses, ar. discussed, and fur.her.r.sear.h p.osp.cts of Ap.BD ar. p.op.sed.

关键词： atmosp.er.c p.essur. glow dischar.e dielectr.c bar.ier.dischar.e low temp.r.tur. p.asma.

Statistical theor. for.hydr.gen bonding fluid system of A_aD_d typ. (I): The geometr.cal p.ase tr.nsition

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

science china Chemistr. 2006年第6期49卷 499-506页

作者： WANG Haijun1,2. HONG Xiaozhong3, GU Fang1 & BA Xinwu1 1. college of Chemistr. and Envir.nment science, {2. university, Baoding 071002. china 2. Inter.ational Center.for.Mater.als p.ysics, Chinese Academy of sciences, Shenyang 110016, china 3. college of p.ysics science and technology, {2. university, Baoding 071002. china college of Chemistr. and Envir.nment science Hebei University Baoding China Inter.ational Center.for.Mater.als p.ysics Chinese Academy of Sciences Shenyang China college of p.ysics science and {2. Hebei University Baoding China

The influence of hydr.gen bonds on the p.ysical and chemical p.op.r.ies of hydr.gen bonding fluid system of AaDd typ. is investigated fr.m two viewp.ints by the p.incip.e of statistical mechanics. In detail, we p.op.sed two new ways that can be used to obtain the equilibr.um size distr.bution of the hydr.gen bonding cluster., and der.ved the analytical exp.ession of a r.lationship.between the hydr.gen bonding fr.e ener.y and hydr.gen bonding degr.e. For.the nonlinear.hydr.gen bonding systems, it is shown that the sol-gel p.ase tr.nsition can take p.ace under.p.op.r.conditions, which is fur.her.p.oven to be a kind of geometr.cal p.ase tr.nsition r.ther.than a ther.odynamic one. Mor.over. sever.l p.oblems associated with the geometr.cal p.ase tr.nsition and liquid-solid p.ase tr.nsition in nonlinear.hydr.gen bonding systems ar. discussed.

关键词： hydr.gen bonding fluid, equilibr.um fr.e ener.y, geometr.cal p.ase tr.nsition.

Ap.lication of High Shear.Agitation for.Desulfur.zation of Gasoline Using Ionic Liquids

在线全文

学校读者我要写书评

暂无评论

china p.tr.leum p.ocessing & p.tr.chemical technology 2006年第4期8卷 41-45页

作者： Zhao Dishun 2.ZhangZhigang 1 Wang Jialei1 Wang Na2.Li Xiangyu 2.(1 college of science,{2., Shijiazhuang 050018 2.college of Chemistr. and p.ar.aceutical Engineer.ng,{2., Shijiazhuang 050018) college of Chemistr. and p.ar.aceutical Engineer.ng Hebei University of Science and Technology Shijiazhuang 050018 China college of science Hebei University of Science and Technology Shijiazhuang 050018 China

The high shear.agitation device was fir.t adop.ed for.gasoline desulfur.zation by ionic liquids. The effect of benzylimidazol fluobor.te in desulfur.zation of gasoline and the influence of moistur. on deuslfur.zation r.te wer. investigated. The exp.r.mental r.sults showed that the ionic liquid could effectively decr.ase the sulfur.content of gasoline and the op.imal conditions wer. as follows: The r.action could be car.ied out at r.om temp.r.tur., a volumetr.c r.tio between oil and the liquid of 2.1, a volumetr.c r.tio between water.and ionic liquid of 0.04:1, a r.tational sp.ed of 5 kr.d/s, and a r.action time of 1 minute. The desulfur.zation r.te of gasoline r.ached 53.6%, and the gasoline yield was up.to 97.3%. The ionic liquid could be r.cycled for.r.p.ated use, and the use of high shear.agitation for.gasoline would have good p.osp.cts.

关键词： ionic liquids desulfur.zation gasoline high shear agitation

p.ylogeny of p.ychostomum (Br.aceae,Musci) infer.ed fr.m sequences of nuclear.r.bosomal DNA inter.al tr.nscr.bed sp.cer.(ITS) and chlor.p.ast r.0}4

在线全文

学校读者我要写书评

暂无评论

Jour.al of Systematics and Evolution 2009年第4期47卷 311-320页

作者： ~(1,2.Chen-Ying WANG ~1Jian-Cheng ZHAO~* 1(college of Life science,{2. Nor.al university,Shijiazhuang 050016,china) 2.Dep.r.ment of Life science,Zhengzhou Teacher. college,Zhengzhou 450044,china) (college of Life science Hebei Normal University Shijiazhuang 050016 China) (Dep.r.ment of Life science Zhengzhou Teachers College Zhengzhou 450044 China)

The p.ylogeny of p.ychostomum was fir.t under.aken based on analysis of the inter.al tr.nscr.bed sp.cer.ITS)r.gion of the nuclear.r.bosomal(nr.DNA and by combining data fr.m nr.NA ITS and chlor.p.ast DNA r.0}4 *** p.r.imony,maximum likelihood,and Bayesian analyses all sup.or. the conclusion that the r.instated genus p.ychostomum is not *** funkii(Schw(a|¨)gr.)*** (≡Br.um funkii Schw(a|¨)gr.)is p.aced within a clade containing the typ. sp.cies of Br.um,*** Hedw. The r.maining member. of p.ychostomum investigated in the p.esent study constitute another.well-sup.or.ed clade. The r.sults ar. congr.ent with p.evious molecular.*** the basis of p.ylogenetic evidence,we agr.e with tr.nsfer.ing *** Mü***.(≡***(Br.d.)Tur.on≡Br.um ar.hangelicum Br.ch & Schimp.), Br.um lonchocaulon Mü***.,Br.um p.llescens *** Schw(a|¨)gr.,and Br.um p.llens *** p.ychostomum.

关键词： Br.um molecular.p.ylogeny nuclear.r.bosomal DNA inter.al tr.nscr.bed sp.cer.sequences p.ychostomum r.0}4 sequences.

Op.imization of ther.omechanical p.ocesses in Cu-Cr.Zr.lead fr.me alloy using neur.l networ.s and genetic algor.thms

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

science china(Technological sciences) 2005年第5期48卷 510-520页

作者： SU Juanhua1,2. LIU p.ng2. DONG Qiming2.& LI Hejun1 1. college of Mater.als science and Engineer.ng, Nor.hwester. p.lytechnical {2., Xi’an 710072. china 2. college of Mater.als science and Engineer.ng, Henan {2. of science and technology, Luoyang 471003, china college of Mater.als science and Engineer.ng Northwestern Polytechnical University Xi’an China college of Mater.als science and Engineer.ng Henan University of Science and Technology Luoyang China

The ther.omechanical tr.atment p.ocess is effective in enhancing the p.op.r.ies of the lead fr.me cop.er.alloy. In this study, an op.imal p.tter. of the ther.omechanical p.ocesses for.Cu-Cr.Zr.was investegated using an intelligent contr.l technique consisting of neur.l networ.s and genetic algor.thms. The inp.t p.r.meter. of the ar.ificial neur.l networ. (ANN) ar. the r.duction r.tio of cold r.lling, aging temp.r.tur. and aging time. The outp.ts of the ANN model ar. the two most imp.r.ant p.op.r.ies of har.ness and conductivity. Based on the successfully tr.ined ANN model, genetic algor.thms (GA) ar. used to op.imize the inp.t p.r.meter. of the model and select p.r.ect combinations of ther.omechanical p.ocessing p.r.meter. and p.op.r.ies. The good gener.lization p.r.or.ance and op.imized r.sults of the integr.ted model ar. achieved.

关键词： Cu-Cr.Zr alloy, ther.omechanical p.ocessing op.imization, ar.ificial neur.l networ., genetic algor.thms.

Quantum secr.t shar.ng between multip.r.y and multip.r.y with four.states

在线全文

学校读者我要写书评

暂无评论

science china(p.ysics,Mechanics & Astr.nomy) 2007年第5期50卷 572-580页

作者： YAN FengLi1, GAO Ting2.& LI YouCheng1 1 college of p.ysics and Infor.ation Engineer.ng, hebei Nor.al {2., Shijiazhuang 050016, china 2.college of Mathematics and Infor.ation science, hebei Nor.al {2., Shijiazhuang 050016, china college of p.ysics and Infor.ation Engineer.ng Hebei Normal University Shijiazhuang China college of Mathematics and Infor.ation science Hebei Normal University Shijiazhuang China

A p.otocol of quantum secr.t shar.ng between multip.r.y and multip.r.y with four.states was p.esented. It was shown that this p.otocol can nullify the Tr.jan hor.e attack with a multi-p.oton signal, the fake-signal attack with Einstein-p.dolsky- r.sen p.ir., the attack with single p.otons, and the attack with invisible p.otons. In addition, the up.er.bounds of the aver.ge success p.obabilities wer. given for.dishonest agent eavesdr.p.ing encr.p.ion using the fake-signal attack with any two-p.r.icle entangled states.

关键词： quantum secr.t shar.ng, secur.ty, Einstein-p.dolsky-r.sen p.ir.