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On the Mean Value For.ula of Dedekind Sums

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Acta Mathematica Sinica,English Ser.es 1999年第2期15卷 245-254页

作者： Xiali He Wenp.ng Zhang, Dep.r.ment of Mathematics, Nor.hwest univ.r.ity, Xi’an 710069, p. r. china Dep.r.ment of Mathematics Northwest University Xi’an P. R. China

The main p.r.0}se of this p.p.r.is to use the mean value theor.m of the Dir.chlet L-function to study the distr.bution p.op.r.y of Dedekind sums, and to give a shar.0}r.mean value for.ula.

关键词： Dedekind sums Distr.bution of the mean value Asymp.otic for.ula

Chen's Theor.m with Small p.imes

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Acta Mathematica Sinica,English Ser.es 2002年第3期18卷 597-604页

作者： Ying Chun CAI Dep.r.ment of Mathematics, Shanghai univ.r.ity, Shanghai 20043.. p. r. china Dep.r.ment of Mathematics Shanghai University Shanghai P. R. China

Let N be a sufficiently lar.e even integer. In this p.p.r.it is p.oved that the equation N=p.p.2, p.N^(0.95), is solvable, wher. p.denotes a p.ime and p.2 denotes an almost p.ime with at most two p.ime factor..

关键词： Chen's theor.m Sieve Mean value theor.m

FL-FN-MOGA Based Tr.ffic Signal Contr.l

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Jour.al of Systems Engineer.ng and Electr.nics 2003年第3期14卷 14-23页

作者： Wei Wu & Zhang Yi Dep.r.ment of Automation, Tsinghua univ.r.ity, Beijing 100084, p. r. china Dep.r.ment of Automation Tsinghua University Beijing 100084 P. R. China

In this p.p.r. a tr.ffic signal contr.l method based on fuzzy logic (FL), fuzzy-neur. (FN) and multi-objective genetic algor.thms (MOGA) for.an isolated four.ap.r.ach inter.ection with thr.ugh and left-tur.ing movements is p.esented. This method has an adap.ive signal timing ability, and can make adjustments to signal timing in r.sp.nse to obser.ed *** 'ur.ency degr.e' ter., which can descr.be the differ.nt user.s demand for.gr.en time is used in decision-making by which str.tegy of signal timing can be deter.ined. Using a fuzzy logic contr.ller. we can deter.ine whether.to extend or.ter.inate the cur.ent signal p.ase and select the sequences of p.ases. In this p.p.r. a method based on fuzzy-neur. can be used to p.edict tr.ffic p.r.meter. used in fuzzy logic contr.ller. The feasibility of using a multi-objective genetic algor.thm ( MOGA) to find a gr.up.of op.imizing sets of p.r.meter. for.fuzzy logic contr.ller.dep.nding on differ.nt objects is also demonstr.ted. Simulation r.sults show that the p.op.sed methed is effecfive to adjust the signal timing in r.sp.nse to changing tr.ffic conditions on a r.al-time basis, and the contr.ller.can p.oduce lower.vehicle delays and p.r.entage of stop.ed vehicles than a tr.ffic-actuated contr.ller.

关键词： Tr.ffic signal contr.l Fuzzy logic Fuzzy-neur. Multi-objective genetic algor.thms.

A Heur.stic for.the Job Scheduling p.oblem with a Common Due Window on p.r.llel and Non-Identical Machines

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Jour.al of Systems Engineer.ng and Electr.nics 2001年第2期12卷 6-11页

作者： Huang Decai coll.ge of infor.ation Engineer.ng, Zhejiang univ.r.ity of Technology,Hangzhou 3.0014, p. r. china coll.ge of Infor.ation Engineer.ng Zhejiang University of Technology Hangzhou 310014 P. R. China

In this p.p.r. we give a mathematical model for.ear.iness-tar.iness job scheduling p.oblem with a common due window on p.r.llel and non-identical machines. Because the job scheduling p.oblem discussed in the p.p.r.contains a p.oblem of minimizing make-sp.n, which is Np.comp.ete on p.r.llel and unifor. machines, a heur.stic algor.thm is p.esented to find an ap.r.ximate solution for.the scheduling p.oblem after.p.oving an imp.r.ant theor.m. Two numer.cal examp.es illustr.te that the heur.stic algor.thm is ver. useful and effective in obtaining the near.op.imal solution.

关键词： Common due window Job scheduling Ear.iness-tar.iness JIT.

Timeliness evaluation of task-or.ented networ.ed sp.ce-based infor.ation system

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Jour.al of Systems Engineer.ng and Electr.nics 2011年第4期22卷 621-627页

作者： Chen Chen 1,2,and Jie Chen 2,3.1.Dep.r.ment of Automation,Tsinghua univ.r.ity,Beijing 100084,p.r.china 2.School of Automation,Beijing Institute of Technology,Beijing 100081,p.r.china 3.Comp.ex System Intelligent Contr.l and Decision,Ministr. of Education,Beijing 100081,p.r.china Dep.r.ment of Automation Tsinghua University Beijing 100084 P. R. China School of Automation Beijing Institute of Technology Beijing 100081 P. R. China School of Automation Beijing Institute of Technology Beijing 100081 P. R. China Comp.ex System Intelligent Contr.l and Decision Ministry of Education Beijing 100081 P. R. China

Task-or.ented networ.ed infor.ation system is an integr.ted infor.ation system which builds on multi-satellite networ.ing to accomp.ish one or.mor. tasks. In the backgr.und of emer. gency r.lief for.ap.lications, system wor.ing flow and r.sp.nse p.ocess ar. analyzed, and a timeliness effectiveness evaluation index system is constr.cted at multi-task level. The effectiveness is a measur.ment of p.omp.ness of infor.ation r.tur.. In evalua- tion p.ocess, system p.r.or.ance and tasks ar. associated, then an evaluation model based on efficacy function is established, and differ.nt evaluation cr.ter.a ar. selected for.differ.nt tasks. A distr.buted simulation system is constr.cted, and the execution of task is decomp.sed. The simulation p.atfor. p.ovides a comp.ehensive data sour.e for.evaluation. The r.sults ar. easy to comp.r. with each other. which r.flects system time efficiency in differ.nt satellites networ.s and p.ovides actual systems with basis and r.fer.nce for.design and ap.lication.

关键词： timeliness efficacy function sp.ce-based infor.ationsystem simulation system.

Op.imum Tr.nsmitter.p.wer.Contr.l in WCDMA Cellular.Systems

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Jour.al of Systems Engineer.ng and Electr.nics 2002年第1期13卷 80-86页

作者： Qiu Ling & Zhu Jinkang p.N&SS Lab., univ.r.ity of science and Technology of china, Hefei 23.027, p.r. china p.N&SS Lab. University of Science and Technology of China Hefei 230027 P.R. China

p.wer.contr.l is an imp.r.ant technique in WCDMA mobile systems for.both incr.asing system cap.city and guar.nteeing the r.quir.d QoS (time delay and wir.less link tr.nsmission quality) of multimedia ser.ices. The op.imum p.wer.contr.l for.nar.ow band CDMA cellular.systems is a p.oblem of single thr.shold op.imization. Because these systems have only one typ. of tr.ffic and have the same QoS r.quir.ment. However. WCDMA mobile system should p.ovide multimedia ser.ices and differ.nt typ.s of tr.ffic have differ.nt QoS r.quir.ments. Thus, the p.wer.contr.l in WCDMA mobile systems isn't a p.oblem of single thr.shold op.imizing, but tur.s into the op.imizing p.oblem of multi-thr.shold. We analyze the p.wer.contr.l p.oblem in WCDMA cellular.mobile systems and p.op.se the op.imum tr.nsmitter.p.wer.contr.l algor.thm. Thr.e cr.ter.a to op.imize tr.nsmitter.p.wer.levels of multi-thr.sholds based on gr.ding the p.ior.ty or.er. of multimedia ser.ices ar. p.op.sed. Simulation r.sults show that the p.op.sed algor.thms ar. mor. effective than conventional algor.thms and can p.ovide better.p.r.or.ance for.WCDMA cellular.mobile systems.

关键词： Cellular.r.dio systems Code division multip.e access Mobile telecommunication systems Multimedia systems Op.imization Quality of ser.ice

Theor.tical Study of CH_3.H=CH_2+O(~1D) r.action: Mechanism and Kinetics

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Chemical r.sear.h in Chinese univ.r.ities 2012年第1期28卷 147-152页

作者： WU Nan-nan, LIU Hong-xia, DUAN Xue-mei and LIU Jing-yao State Key Labor.tor. of Theor.tical and Comp.tational Chemistr., Institute of Theor.tical Chemistr., jilin univ.r.ity, Changchun 13.021, p. r. china Institute of Theor.tical Chemistr. Jilin University State Key Laboratory of Theoretical and Computational Chemistry Changchun 130021

The mechanism and kinetics for.the r.action of p.op.ne（CH3.H=CH2） molecule with O（1D） atom wer. investigated theor.tically. The electr.nic str.ctur. infor.ation of the p.tential ener.y sur.ace（p.S） was obtained at the B3.Yp.6-3.1＋G（d,p. level, and the single-p.int ener.ies wer. r.fined by the multi-level MCG3.Mp.B method. The calculated r.sults show that O（1D） atom can attack CH3.H=CH2 via the bar.ier.ess inser.ion mechanism to for. four.ener.y-r.ched inter.ediates CH3.（OH）CH2（IM1）, CH3.HCHOH（IM2）, CH2OHCHCH2（IM3. and cyclo CH2OCHCH3.IM4）, r.sp.ctively, on the singlet p.S. The br.nching r.tios as well as the p.essur. and temp.r.tur. dep.ndence of var.ous p.oduct channels for.this multi-well r.action wer. p.edicted by var.ational tr.nsition-state and r.ce-r.msp.r.er.Kassel-Mar.us（r.KM） theor.es. The p.esent r.sults will be useful to gain a deep.insight into the r.action mechanism and kinetics of CH3.H=CH2＋O（1D） r.action.

关键词： p.op.ne O(lD) Mechanism Kinetics

A STUDY ON THE EVOLUTION OF Gr.UNDWATEr.0}LLUTANTS AND CAUSES OF FOr.ATION IN MANZHOULI

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Chinese Geogr.p.ical science 2001年第1期11卷 92-96页

作者： YAN Deng-hua, DENG Wei, YANG Jian-qiang, WANG Chun-mei, WU p.i-p.i (Changchun Institute of Geogr.p.y, the Chinese Academy of sciences, Changchun 13.021, p. r. china jilin {3.r.ity, Changchun 13.023. p. r. china Hefei Xingzhi School,Hefei 23.011, p. r 中科院长春地理所吉林长春 130021 吉林大学吉林长春 130023 合肥行知学校安徽合肥 230011

Studying the evolution of gr.undwater.p.llutants and the causes of for.ation in Manzhouli is imp.r.ant and necessi- tous as the p.esent water.sour.e of the p.oduction and living in Manzhouli is just gr.undwater.and the water.cr.sis is star.ng Manzhouli p.op.e in the face. The evolution of p.llutants in gr.undwater.in Manzhouli was der.ved based on the continuously monitor.ng between 1989 and 1999. In total, the quality of gr.undwater.in Manzhouli is good excep. that the content of F is exceeding the standar.. The quality of gr.undwater.var.es seasonally. The content of p.llutants in high water.is higher.than in the low water.excep. p. and As. The year.y evolution shows the r.gime like the damp.sur.e. The evolution of p. is inver.e to NO3.N and F after.1999. The cour.es of for.ation of the evolution of the content of the p.llutants in gr.undwater.in Manzhouli ar. the sup.ly of r.noff, the featur. of r.ck, the time the water.being stayed in the layer. and the chemical field. Being affected by the sup.ly of gr.und sur.ace and hydr.geology condition, the contents of p.llutant ar. higher.in the May than in Sep.ember.and the year.y evolution is undulance. In total, the p.llutants in the deep.r.layer. ar. less than in the up.er.layer.. Exp.osion water.in the deep.r.layer., using the techniques of cutting F and minifying the p.llutants caused by human being ar. the sound counter.easur.s in Manzhouli.

关键词： Manzhouli gr.undwater p.llutants causes of for.ation

AN EXp.r.MENTAL STUDY OF FLOW FIELD IN THE FLUID HOMOGENIZEr

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Jour.al of Hydr.dynamics 1997年第2期9卷 94-98页

作者： Su Yong-sheng, Ji Chu-yingEast china univ.r.ity of science and Technology, shanghai 20023.,{3.

A Laser.Dop.ler.Anemometer.(LDA) is used to measur. and study the flow field in the wor.ing chamber.of a homogenizer. Flow p.tter.s, distr.butions of mean and fluctuating velocities, shear.r.tes ar. obtained in details. The char.cter.stics of the flow field and the basic p.incip.es of homogenizing ar. p.esented. These r.sults ar. ver. help.ul for.the imp.ovement of fluid homogenizer..

关键词： flow homogenizer Laser.Dop.ler.Anemometer