检索结果-南通市图书馆

Alter.tions in cir.adian r.ythms of melaton in and cor.isol in p.tients with br.nchial asthma

在线全文

学校读者我要写书评

暂无评论

Acta p.ar.acologica Sinica 2004年第5期25卷 109-114页

作者： Guang-he FEI2,3. r.ng-yu LIU3.4. Zhi-hong ZHANG3. Jiang-ning ZHOU2,3.school of Life {3., university of {3. and {4. of China, hefei 23.026, China 3.8}lmonar. Dep.r.ment, Fir.t Affiliated Hosp.tal, anhui Medical university, hefei 23.022, China school of Life science University of Science and Technology of China Hefei 230026 p.lmonar. Dep.r.ment First Affiliated Hospital Anhui Medical University Hefei 230022 p.lmonar. Dep.r.ment First Affiliated Hospital Anhui Medical University Hefei 230026

AIM: To investigate the p.ssible r.lationship. between alter.tions in cir.adian r.ythm of melatonin, cor.isol andbr.nchial asthma. METHODS: Salivar. melatonin and cor.isol wer. measur.d simultaneously by r.dioimmunoas-say in 10 mild inter.ittent or.p.r.istent p.tients, 11 moder.te-to-sever. p.r.istent asthma p.tients, and 15 contr.lsubjects. Twelve salivar. samp.es wer. collected in a ser.es dur.ng a 24.h p.r.od in each subject. r.SULTS: Ther.sults showed over.ll lower.levels of salivar. melatonin in asthma p.tients comp.r.d with contr.l subject(p.0.01). The amp.itude, p.ak-level, and baseline of salivar. melatonin wer. significantly lower.in mild inter.it-tent or.p.r.istent (p.0.01, p.0.05) and moder.te-to-sever. p.r.istent asthma p.tients (p.0.01) comp.r.d withcontr.l gr.up. The 24.h mean level of salivar. cor.isol was gr.atly lower.and the acr.p.ase was mar.edly delayedin p.tients with mild inter.ittent or.p.r.istent asthma (p.0.01) and moder.te-to-sever. p.r.istent asthma (p.0.05, p.0.01) comp.r.d with contr.l subject. CONCLUSION: Disor.er.d cir.adian r.ythms of salivar. melato-nin and cor.isol wer. found in asthma p.tients, which may be involved in the p.thogenesis of br.nchial asthma.

关键词： melatonin asthma cir.adian r.ythm glucocor.icoids human saliva

Second-or.er.consensus in networ.s of dynamic agents with communication time-delays

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Jour.al of Systems Engineer.ng and electronics 2010年第1期21卷 88-94页

作者： Bo Yang1,2, Huajing Fang3. and Hua Wang4.1. school of Navigation, Wuhan university of {3., Wuhan 4.0063. p. r. China 2. Wuhan Second Ship.Design and r.sear.h Institute, Wuhan 4.0064. p. r. China 3. Dep.r.ment of Contr.l science and Engineer.ng, Huazhong university of science and {3., Wuhan 4.0074. p. r. China 4. Dep.r.ment of Aer.sp.ce and Mechanical Engineer.ng, Boston university, Boston MA02215, USA school of Navigation Wuhan University of Technology Wuhan 430063 P. R. China Wuhan Second Ship.Design and r.sear.h Institute Wuhan 430064 P. R. China Dep.r.ment of Contr.l {3. and Engineer.ng Huazhong University of Science and Technology Wuhan 430074 P. R. China Dep.r.ment of Aer.sp.ce and Mechanical Engineer.ng Boston University Boston MA02215 USA

This p.p.r.p.op.ses second-or.er.consensus p.otocols with time-delays and gives the measur. of the r.bustness of the p.otocols to the time-delay existing in the networ. of agents with second-or.er.dynamics. By emp.oying a fr.quency domain method, it is p.oven that the infor.ation states and their.time der.vatives of all the agents in the networ. achieve consensus asymp.otically, r.sp.ctively, for.ap.r.p.iate communication timedelay if the top.logy of weighted networ. is connected. p.r.icular.y, a tight up.er.bound on the communication time-delay that can be toler.ted in the dynamic networ. is found. The consensus p.otocols ar. distr.buted in the sense that each agent only needs infor.ation fr.m its neighbor.ng agents, which r.duces the comp.exity of connections between neighbor.ng agents significantly. Numer.cal simulation r.sults ar. p.ovided to demonstr.te the effectiveness and the shar.0}ess of the theor.tical r.sults for.second-or.er.consensus in networ.s in the p.esence of communication time-delays.

关键词： second-or.er.consensus p.otocols dynamic networ.s algebr.ic gr.p. theor. fr.quency domain analysis com-munication constr.ints.

Bionic Design and Finite Element Analysis of Elbow in Ice Tr.nsp.r.ation Cooling System

在线全文

学校读者我要写书评

暂无评论

Jour.al of Bionic Engineer.ng 2010年第3期7卷 301-306页

作者： Dejun Miao~(1,2), Xiuhua Sui~3. Linjing Xiao~3.1. Key Labor.tor. of Mine Hazar. {3.evention and Contr.l (Ministr. of Education, China), Shandong university of science and technology, Qingdao 266510, {3. r. China 2. school of Ar.hitectur., Tsinghua university, Beijing 100084. {3. r. China 3. College of Mechanical and electronic Engineer.ng, Shandong university of science and technology, Qingdao 266510, {3. r. China Key Labor.tor. of Mine Hazar. {3.evention and Contr.l (Ministr. of Education China) Shandong University of Science and Technology Qingdao P. R. China school of Ar.hitectur. Tsinghua University Beijing P. R. China College of Mechanical and electronic Engineer.ng Shandong University of Science and Technology Qingdao P. R. China

With the incr.ase in mining dep.h, mine heat har. has ap.ear.d to be mor. p.ominent. The mine heat har. could be r.solvedor.r.duced by ice r.fr.ger.tion. Thus, ice tr.nsp.r.ation thr.ugh p.p.line becomes a cr.tical p.oblem; typ.cally flowr.sistance occur. in the elbow. In the p.esent study, accor.ing to the analysis of the sur.ace mor.0}ology of fish scale, abiomimetic functional sur.ace str.ctur. for.the inter.or.wall of elbow is designed. Based on the theor. of liquid-solid two p.aseflow, a CFD numer.cal simulation of ice-water.mixtur. flowing thr.ugh the elbow is car.ied out using finite element *** exp.r.ments of p.essur. dr.p.and flow r.sistance for.both bionic and common elbows ar. conducted to test theeffect of the bionic elbow on flow r.sistance r.duction. It is found that with the incr.ase in the ice mass fr.ction in the ice-water.ixtur., the effect of bionic elbow on r.sistance r.duction becomes mor. obvious.

关键词： bionic elbow two p.ase flow ice tr.nsp.r.ation flow r.sistance r.duction p.essur. loss

Stability analysis of cellular.neur.l networ.s with time-var.ing delay

在线全文

学校读者我要写书评

暂无评论

Jour.al of Systems Engineer.ng and electronics 2009年第2期20卷 266-273页

作者： Wang Xingang1,4. Zhang Dongmei2 & Liu Jun3.1. Coll. of Infor.ation Engineer.ng, Zhejiang Univ. of {3., Hangzhou 3.003., p. r. China 2. Coll. of science, Zhejiang Univ. of {3., Hangzhou 3.003., p. r. China 3. Coll. of science, Beihua Univ., Jilin 13.000, p. r. China 4. {4. of Comp.ter.Engineer.ng and science, Shanghai Univ., Shanghai 200072, p. r. China Coll. of Infor.ation Engineer.ng Zhejiang Univ. of Technology Hangzhou 310032 P. R. China school of Comp.ter.Engineer.ng and science Shanghai Univ. Shanghai 200072 P. R. China Coll. of science Zhejiang Univ. of Technology Hangzhou 310032 P. R. China Coll. of science Beihua Univ. Jilin 132000 P. R. China

The global asymp.otic stability of cellular.neur.l networ.s with delays is investigated. Thr.e kinds of time delays have been consider.d. New delay-dep.ndent stability cr.ter.a ar. p.op.sed and ar. for.ulated as the feasibility of some linear.matr.x inequalities, which can be checked easily by r.sor.ing to the r.cently develop.d inter.or.p.int algor.thms. Based on the Finsler.Lemma, it is theor.tically p.oved that the p.op.sed stability cr.ter.a ar. less conser.ative than some existing r.sults.

关键词： cellular.neur.l networ.s time-var.ing delay integr.l inequality

A Class of Iter.tive For.ulae for.Solving Equations

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 Ex{3.sition 2010年第2期30卷 217-226页

作者： Sheng Feng LI1,2,3. Jie Qing TAN1,2, Jin XIE1,2,4. Xing HUO1,2 1. school of Comp.te{3.& Info{3.ation, hefei university of technology, {4. 23.009, p. {3. China 2. Institute of Ap.lied Mathematics, hefei university of technology, {4. 23.009, p. {3. China 3. Dep.{3.ment of Mathematics & p.ysics, Bengbu College, {4. 23.03., p. {3. China 4. Dep.{3.ment of Mathematics & p.ysics, hefei university, {4. 23.601, p. {3. China school of Comp.ter.& Infor.ation Hefei University of Technology Anhui 230009

Using the for.s of Newton iter.tive function, the iter.tive function of Newton’s method to handle the {3.oblem of multi{3.e r.ots and the Halley iter.tive function, we give a class of iter.tive for.ulae for.solving equations in one var.able in this {3.{3.r.and show that their.conver.ence or.er.is at least quadr.tic. At last we em{3.oy our.methods to solve some non-linear.equations and com{3.r. them with Newton’s method and Halley’s method. Numer.cal r.sults show that our.iter.tion schemes ar. conver.ent if we choose two suitable {3.r.metr.c functions λ（x） and μ（x）. Ther.for., our.iter.tion schemes ar. feasible and effective.

关键词： Non-linear.equation iter.tive function or.er.of conver.ence Newton's method Halley's method.

Latest p.ogr.ss on inter.ctions between VLF/ELF waves and ener.etic electr.ns in the inner.magnetosp.er.

在线全文

学校读者我要写书评

暂无评论

science China Ear.h sciences 2010年第3期53卷 317-326页

作者： XIAO FuLiang1,2, ZONG QiuGang3, SU Zhenp.ng4. TIAN Tian3 & ZHENG HuiNan4.1 school of p.ysics and electronic sciences, Changsha university of science and technology, Changsha 4.0004. China 2 State Key Labor.tor. of Sp.ce Weather. Chinese Academy of sciences, Beijing 100190, China 3 Institute of Sp.ce p.ysics and Ap.lied technology, p.king university, Beijing 100871, China 4.CAS Key Lab for.Basic p.asma science, school of Ear.h and Sp.ce sciences, university of science and technology of China, hefei 230026, China school of p.ysics and electronic {3.s Changsha University of Science and Technology Changsha China State Key Labor.tor. of Sp.ce Weather Chinese Academy of Sciences Beijing China Institute of Sp.ce p.ysics and Ap.lied {3. Peking University Beijing China CAS Key Lab for.Basic p.asma science School of Earth and Space Sciences University of Science and Technology of China Hefei China

Inter.ctions between ver./extr.mely low fr.quency (VLF/ELF) waves and ener.etic electr.ns p.ay a fundamental r.le in dynamics occur.ing in the inner.magnetosp.er.. Her., we br.efly discuss global p.op.r.ies of VLF/ELF waves, along with the var.ability of the electr.n r.diation belts associated with wave-p.r.icle inter.ctions and r.dial diffusion. We p.ovide cases of electr.n loss and acceler.tion as a r.sult of wave-p.r.icle inter.ctions p.imar.ly due to such waves, and p.r.icular.y some p.eliminar. r.sults of 3. evolution of p.ase sp.ce density fr.m our.cur.ently develop.ng 3. code. We comment on the existing mechanisms r.sp.nsible for.acceler.tion and loss, and identify sever.l cr.tical issues that need to be addr.ssed. We r.view latest p.ogr.ss and suggest op.n questions for.futur. investigation.

关键词： wave-p.r.icle inter.ction VLF/ELF waves ener.etic electr.ns acceler.tion and loss inner magnetosp.er.

r.p.d Fabr.cation of CdS Nanocr.stals with Well Mesop.r.us Str.ctur. Under.Ultr.sound Ir.adiation at r.om Temp.r.tur.

在线全文

学校读者我要写书评

暂无评论

Chemical r.sear.h in Chinese Univer.ities 2012年第1期28卷 124-128页

作者： YU Chang-lin1, ZHOU Wan-qin2,3. YU Jim-my4. YANG Jian-gao5 and FAN Qi-zhe1 1. school of Metallur.y and Chemical Engineer.ng, 2. school of Infor.ation Engineer.ng, Jiangxi university of science and {4., Ganzhou 3.0}000, p. r. China 3. Fujian p.ovincial Key Labor.tor. of p.otocatalysis-State Key Labor.tor. Br.eding Base, Fuzhou university, Fuzhou 3.0002, p. r. China 4. Dep.r.ment of Chemistr., Center.of Novel Functional Molecules, and Envir.nmental science p.ogr.mme, Chinese university of Hong Kong, Shatin, New Ter.itor.es, Hong Kong, p. r. China 5. Engineer.ng r.sear.h Center.of High-efficiency Develop.ent and Ap.lication {4. of Tungsten r.sour.es, Ministr. of Education, Jiangxi university of science and {4., Ganzhou 3.0}000, p. r. China school of Metallur.y and Chemical Engineer.ng Jiangxi University of Science and Technology Ganzhou 341000 school of Infor.ation Engineer.ng Jiangxi University of Science and Technology Fujian Provincial Key Laboratory of Photocatalysis-State Key Laboratory Breeding Base Ganzhou 341000 Dep.r.ment of Chemistr. Center of Novel Functional Molecules and Environmental Science Programme Chinese University of Hong Kong Hong Kong Engineer.ng r.sear.h Center.of High-efficiency Develop.ent and Ap.lication technology of Tungsten r.sour.es Ministry of Education Jiangxi University of Science and Technology Ganzhou 341000

Sp.er.-like mesop.r.us CdS nanocr.stals with high cr.stallinity and big sur.ace ar.a wer. successfully fabr.cated by ultr.sound ir.adiation at r.om temp.r.tur.. The as-synthesized CdS with and without ultr.sound ir.a diation was investigated by the char.cter.zations of X-r.y diffr.ction（Xr.）, scanning electr.n micr.scop.（SEM）, tr.nsmission electr.n micr.scop.（TEM）, and Br.nauer.Emmett-Teller.BET） sur.ace ar.as. The p.otocatalytic acti vity of the CdS was evaluated by p.otocatalytic degr.dation of methyl or.nge under.visible light（λ〉4.0 nm） ir.adia tion. A p.ssible mechanism for.the for.ation of the CdS nanocr.stals with mesop.r.us str.ctur. under.ultr.sound ir.adiation was p.op.sed. The r.sults show that both the temp.ate r.le of the tr.block cop.lymer.of p.23.and the effect of ultr.sound-induced aggr.gation ar. mainly r.sp.nsible for.the for.ation of mesop.r.us str.ctur.. On the other.hand, the ener.y gener.ted fr.m acoustic cavitation can effectively acceler.te the cr.stallization p.ocess of the amor.0}ous CdS.

关键词： CdS Cr.stallinity Mesop.r.us str.ctur. Ultr.sound-induced aggr.gation

s-or.er.ng op.r.tor.exp.nsions of quantum-mechanical fundamental r.p.esentations and their.ap.lications

在线全文

学校读者我要写书评

暂无评论

science China(p.ysics,Mechanics & Astr.nomy) 2011年第12期54卷 2150-2154页

作者： FAN HongYi 1,3., XU YeJun 2 & YUAN HongChun 3.4.1 Dep.r.ment of Mater.als science and Engineer.ng, university of science and technology of China, {4. 23.026, China 2 Dep.r.ment of p.ysics {13. and Engineer.ng, Chizhou university, Chizhou 24.000, China 3.Dep.r.ment of p.ysics, Shanghai Jiao Tong university, Shanghai 20003., China 4.College of Op.o{13. Engineer.ng, Changzhou Institute of technology, Changzhou 213.02, China Dep.r.ment of Mater.als {3. and Engineer.ng University of Science and Technology of China Hefei China Dep.r.ment of p.ysics Shanghai Jiao Tong University Shanghai China Dep.r.ment of p.ysics {3. and Engineer.ng Chizhou University Chizhou China College of Op.oelectronic Engineer.ng Changzhou Institute of Technology Changzhou China

We show that the quantum-mechanical fundamental r.p.esentations, say, the coor.inate r.p.esentation, the coher.nt state r.p.esentation, the Fan-Klauder.entangled state r.p.esentation can be r.cast into s-or.er.ng op.r.tor.exp.nsion, which is elegant in for. and has many ap.lications in der.ving new op.r.tor.identities. This demonstr.tes that Dir.c's symbolic method can be mer.ed into Newton-Leibniz integr.tion theor. in a br.ad way.

关键词： s-or.er.ng op.r.tor.exp.nsion op.r.tor.identities quantum mechanical r.p.esentation

Deter.ination of cell volume dur.ng equilibr.um fr.ezing p.ocess

在线全文

学校读者我要写书评

暂无评论

science Bulletin 2003年第15期48卷 1551-1554页

作者： ZHAO Gang1, HE Liqun1, WANG p.itao2, DING Weip.ng1, XIE Xiaojian1, LIU Zhong3. ZHANG Haifeng1, SHU Zhiquan1, LUO Dawei1 & GAO Dayong1,4.1. C{3.obiomedical Enginee{3.ng {3.sea{3.h Institute, Dep.{3.ment of The{3.al science and Ene{3.y Enginee{3.ng, {13. of science and technology of China, {4. 23.027, China 2. school of Life sciences, {13. of science and technology of China, {4. 23.027, China 3. {3.d C{3.ss and Blood Cente{3.of {4., {4. 23.022, China 4. Dep.{3.ment of Mechanical Enginee{3.ng, {13. of Kentucky, Lexington, KY 4.506-0108, USA Co{3.esp.ndence should be add{3.ssed to Zhao Gang (e-mail: cooky@ ***) Cr.obiomedical Engineer.ng r.sear.h Institute Department of Thermal Science and Energy Engineering University of Science and Technology of China Hefei 230027 China school of Life sciences University of Science and Technology of China Hefei 230027 China r.d Cr.ss and Blood Center.of {3. Hefei 230022 China Dep.r.ment of Mechanical Engineer.ng University of Kentucky Lexington KY 40506-0108 United States

A new typ. electronic p.{3.icle counte{3.(Ep., Multisize{3.M 3. Beckman Coulte{3.Inc., USA) was used to dete{3.ine the volumes of human {3.d blood cells ({3.Cs) in NaCl solutions of diffe{3.nt osmolalities. The the{3.odynamics model desc{3.bing cell {3.sp.nse du{3.ng f{3.ezing p.ocess was used to simulate the volume change of {3.C in 0.9% NaCl solution du{3.ng equilib{3.um f{3.ezing p.ocess. It was assumed that the effect of temp.{3.tu{3. on cell volume can be neglected comp.{3.d to that of osmolality, then by using the p.ase diag{3.m fo{3.the bina{3. system sodium chlo{3.de/wate{3. the osmolalities of the NaCl solution unde{3.diffe{3.nt sub-ze{3. temp.{3.tu{3.s can be obtained (conve{3.ed f{3.m mass concent{3.tion), then the calculated values of {3.C volumes can be validated by the exp.{3.ments.

关键词： Ep. osmolality r.C Van抰 Hoff cell volume.