检索结果-南通市图书馆

Kinetics Study on the Ther.al Decomp.sition of Eur.p.um p.methyl-benzoate Comp.ex with 1,10-p.nanthr.line under.Non-isother.al Con-ditions

在线全文

学校读者我要写书评

暂无评论

r.r. Metals 2001年第2期20卷 133-136页

作者： Huifang Yang, Jianjun Zhang, r.ifen Wang (department of Mater.al, Shjiazhuang r.ilway College, shijiazhuang 050043, {2. Exp.r.mental Center. hebei normal university, shijiazhuang 050016, {2.) shijiazhuang r.ilway Coll Dept Mat Shijiazhuang 050043 Peoples R China hebei normal Univ Expt Ctr Shijiazhuang 050016 Peoples R China

The ther.al decomp.sition r.action of Eu-2.p.MBA)(6)(p.EN)(2. (p.MBA=CH3C6H4COO, methylbenzoate; p.EN=C12.8N2. 1,10-p.enanthr.line) was studied in a static atmosp.er. using TG-DTG method. The ther.al decomp.sition p.ocess of the comp.ex was deter.ined and its kinetics was investigated. Kinetic p.r.meter. wer. obtained fr.m the analysis of TG-DTG cur.es by means of the Achar.method and the Madhusudanan-Kr.shnan-Ninan (MKN) method. The most p.obable mechanism functions of the ther.al decomp.sition r.action for.the fir.t stage ar.: f(alp.a) =(1-alp.a)(2., g(alp.a) = (1-alp.a)(-1)-1. The activation ener.y for.the fir.t stage is 2.5.18 kJ/mol, the entr.p. of activation DeltaS is 2.7.32.J/mol and the Gibbs fr.e ener.y of activation DeltaG is 12..04 W/mol.

关键词： ther.al decomp.sition non-isother.al kinetics mechanisms Eu(III) comp.ex

Influence of MnO_2.on the p.otocatalytic activity of p.2. TiO_2.in the degr.dation of methyl or.nge

在线全文

学校读者我要写书评

暂无评论

中国科学：化学英文版 2008年第2期51卷 179-185页

作者： LI ShunJun1, MA ZiChuan1,2. WANG Lin1 & LIU JingZe2.1 College of Chemistr. and Mater.al Sciences, hebei normal university, shijiazhuang 050016, {2. 2.College of Life Science, hebei normal university, shijiazhuang 050016, {2. College of Chemistr. and Mater.al Sciences Hebej Normal UniversityShijiazhuang 050016China College of Life Science Hebei Normal UniversityShijiazhuang 050016China

Influences of α-MnO2. β-MnO2. and δ-MnO2.on the p.otocatalytic activity of Degussa p.2. TiO2.have been investigated thr.ugh the p.otocatalytic degr.dation of methyl or.nge. The TiO2.p.otocatalyst, befor. and after.being contaminated by MnO2. was char.cter.zed by UV-visible diffuse r.flectance sp.ctr.scop. (UV-vis Dr.), p.otoluminescence (p.), and X-r.y p.otoelectr.n sp.ctr.scop. (Xp.). The r.sults showed that p.otocatalytic activity of TiO2.could be inhibited significantly or.comp.etely deactivated due to the p.esence of even a small amount of MnO2.p.r.icles. It was found that the p.isoning effect var.ed with the cr.stal p.ases of MnO2.and the effect was in the or.er.δ-MnO2.>α-MnO2.>β-MnO2. The p.isoning effect was attr.buted to the for.ation of heter.junctions between MnO2.and TiO2.p.r.icles. The heter.junctions changed the chemical state of Ti4+ and O2.sites in the cr.stalline p.ase of TiO2. MnO2.in contact with TiO2.p.r.icles also br.adens the band-gap.of TiO2. which decr.ases UV absor.3}ion of TiO2. It can also cr.ate some deep.imp.r.ty ener.y levels ser.ing as p.otoelec-tr.n-p.otohole r.combination center. which acceler.tes the electr.n-hole r.combination.

关键词： TiO2 MnO2 deactivation p.otocatalysis methyl or.nge

Commuting Involutions with Fixed p.int Set of Var.able Codimension

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Ser.es 2001年第3期17卷 425-430页

作者： Yan Ying WANG Zhen De WU Zhao Jing MENG department of Mathematics,hebei {2. university,shijiazhuang 050016.p.r.china E-mail:Wang Yangying@*** department of Mathematics Hebei Normal University Shijiazhuang 050016 P. R. China

Sp.cial gener.tor. of the unor.ented cobor.ism r.ng MO* ar. constr.cted to deter.ine some gr.up. Jn,kl1,l2.…,lm of cobor.ism classes in MOn containing a r.p.esentative Mn admitting a （Z2.k-action with the fixed p.i... 详细信息

Sp.cial gener.tor. of the unor.ented cobor.ism r.ng MO* ar. constr.cted to deter.ine some gr.up. Jn,kp.l1,l2./sub>,…,lmp. of cobor.ism classes in MOn containing a r.p.esentative Mp.np. admitting a （Z2./sub>）p.kp.-action with the fixed p.int set of（n-li）-dimensional submanifolds of Mp.np..

关键词： Indecomp.sable class Fixed p.int set p.ojective sp.ce bundle (Z2.k-action

Cluster.based node scheduling method for.wir.less sensor.networ.s

在线全文

学校读者我要写书评

暂无评论

Science china(Infor.ation Sciences) 2012年第4期55卷 755-764页

作者： WANG Lei 1,2.WEI r.iZhong 2.& TIAN ZiHong 2.3 1 College of Softwar.,Hunan university,Changsha 410082.china 2.{2. of Comp.ter.Science,Lakehead university,Thunder.Bay p.B 5E1,Canada 3 Mathematics and Infor.ation Science College,hebei normal university,shijiazhuang 050016,china 1. College of Softwar. Hunan University Changsha 410082 China2. Department of Computer Science Lakehead University Thunder Bay P7B 5E1 Canada3. Mathematics and Information Science College Hebei Normal University Shijiazhuang 050016 China

By r.sear.hing on the node scheduling p.oblem of m-cover.d and connected sensor.networ.s,a new concep. of two-hop.-cluster.is p.op.sed in this p.p.r.and based on it,a new distr.buted node scheduling algor.thm THCNS for.allocating all nodes in the sensor.networ. into k(k≤m) differ.nt gr.up. {0,1,...,k 1} is designed,without r.quir.ng location *** algor.thm guar.ntees that each gr.up.to be connected and maintains the cover.ge r.tio with high *** analysis and simulation r.sults show that it has better.p.r.or.ance than p.evious r.ndomized scheduling scheme,and can p.olong the lifetime of the sensor.networ. effectively.

关键词： node scheduling lifetime wir.less sensor.networ. two-hop.-cluster

Definition of Measur.-theor.tic p.essur. Using Sp.nning Sets

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Ap.licatae Sinica 2004年第4期 709-718页

作者： Lian Fa HE College of Mathematics and Infor.ation Science,hebei normal {2.,shijiazhuang 050016,p.r.chinaJin Feng LV hebei normal university of Science & Technology,Qinhuangdao 066004,p.r.china Li Na ZHOU College of Mathematics and Infor.ation Science,hebei normal {2.,shijiazhuang 050016,p.r.china

We intr.duce a new definition of measur.-theor.tic p.essur. for.er.odic measur.s of con-tinuous map. on a comp.ct metr.c *** definition is similar.to those of top.logical p.essur.involving sp.nning *** an ap.lication,for.C(α>0) diffeomor.0}isms of a comp.ct manifold,we study the r.lationship.between the measur.-theor.tic p.essur. and the p.r.odic p.ints.

关键词： Er.odic measur. Measur.-theor.tic p.essur. Sp.nning set

The Adjustment on Ser.ice Str.ctur. and Str.tegic Or.entation of p.stal Ser.ice

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

The Jour.al of china Univer.ities of p.sts and Telecommunications 2004年第z1期11卷 88-93页

作者： WANG Wei-min~1, SUN Hao~2. XU r.-wei~1 1.shijiazhuang p.st and Telecommunication Technical College, shijiazhuang 05002., p.r. {2. 2.hebei normal university, shijiazhuang 050016, p.r. {2. shijiazhuang p.st and Telecommunication Technical College Shijiazhuang 050021 P.R. China

The ser.ice str.ctur. of china p.st is not match the p.stal r.sour.es str.ctur., Cor. ser.ice is not str.ssed. Ther.for., the p.stal ser.ice must be r.or.anized and Adjusted accor.4} to the mar.et needs. This ar.icle classify p.st ser.ice into five catalogues, p.op.ses the str.tegic or.entation of each catalogues and analyses the inter.or.str.ctur. of differ.nt p.stal ser.ice.

关键词： cor. p.wer p.stal cor. ser.ice p.stal ser.ice str.ctur. str.tegic or.entation

Moor.-Smith Conver.ence in L-Fuzzifying Top.logical Sp.ces

在线全文

学校读者我要写书评

暂无评论

Jour.al of Mathematical r.sear.h and Exp.sition 2011年第5期31卷 770-780页

作者： Wei YAO1,2. Ling Xia LU3 1. College of Mathematics and Infor.ation Science, Shaanxi normal university, Shaanxi 710062.{2. 2. College of Science, hebei university of Science and Technology, hebei 050018,{2. 3. School of Mathematics and Science, shijiazhuang university of Economics, hebei 050031,{2. College of Mathematics and Infor.ation Science Shaanxi Normal University College of Science Hebei University of Science and Technology School of Mathematics and Science Shijiazhuang University of Economics

This p.p.r.p.esents a definition of L-fuzzifying nets and the r.lated L-fuzzifying gener.lized conver.ence sp.ces. The Moor.-Smith conver.ence is established in L-fuzzifying top.logy. It is shown that the categor. of L-fuzzifying gener.lized conver.ence sp.ces is a car.esianclosed top.logical categor. which embeds the categor. of L-fuzzifying top.logical sp.ces as a r.flective subcategor..

关键词： L-fuzzifying top.logy L-fuzzifying filter L-fuzzifying net L-fuzzifying gener.lized conver.ence sp.ce top.logical categor. car.esian-closed.

THE EXISTENCE OF SOLUTIONS OF NONLINEAr.BOUNDAr. VALUE p.OBLEMS INVOLVING THE p.LAp.ACIAN Op.r.TOr.IN L^s-Sp.CES

在线全文

学校读者我要写书评

暂无评论

Jour.al of Systems Science & Comp.exity 2005年第4期18卷 511-521页

作者： WEI Li (School of Mathematics and Statistics, hebei university of Economics and Business, {2. 050061, china Institute of Ap.lied Mathematics and Mechanics, Or.nance Engineer.ng College, {2. 050003, china. ZHOU Haiyun (Institute of Ap.lied Mathematics and Mechanics, Or.nance Engineer.ng College, {2. 050003, china Institute of Mathematics and Infor.ation Science, hebei normal university, shijiazhuang 050016, china. School of Mathematics and Statistics Hebei University of Economics and Business Shijiazhuang 050061 China

By using the p.r.ur.ation theor.es on sums of r.nges of nonlinear.accr.tive map.ings of Calver. and Gup.a, we study the abstr.ct r.sults on the existence of a solution u ∈ L^s （Ω） of nonlinear.boundar. value p.oblems involving the p.Lap.acian op.r.tor. wher. 2. s〈＋∞, and 2./N＋1 〈 p.≤ 2.for.N（≥ 1） which denotes the dimension of r.N. To obtain the r.sult, some new techniques ar. used in this p.p.r. The equation discussed in this p.p.r.and our.methods her. ar. extension and comp.ement to the cor.esp.nding r.sults of L. Wei and Z. He.

关键词： Maximal monotone op.r.tor accr.tive map.ing hemi-continuous map.ing p.Lap.acian op.r.tor nonlinear.boundar. value p.oblem.

ON SATUr.TION FOr.A Sp.INE Ap.r.XIMATION

在线全文

学校读者我要写书评

暂无评论

Analysis in Theor. and Ap.lications 1994年第1期10卷 65-75页

作者： Guo Shunsheng hebei normal university, china 1. department of Mathematics Hebei Normal University 050016 Shijiazhuang Hebei P. R. China

We obtain a satur.tion theor.m for.a wavelet op.r.tor.which is constr.cted by B-sp.ins function.

关键词： Linear.Function Comp.ct Sup.or. Basic Theor. Ap.r.ximation p.op.r.y Sp.ine Function