。1058· 北京科技大学学报 第29卷 AS/RS planning based on three-phase simulation ZHAO Ning,DONG Shaohua,WANG Guohua,DING Wenying,FENG Ailan Mechanical Engineering School,University of Science and Technology Beijing.Beijing 100083,China ABSTRACT To make AS/RS planning more scientific and reasonable,the set theory was used to describe an AS/RS system,the goal of AS/RS w as quantified and the rule of AS/RS planning was pointed out.The whole process of AS/RS planning was partitioned to three phases:prime planning,particular planning,and working planning.The simulation method suit able for each phase was carried out to satisfy planning requirements of each phase.A three-phase integrated simulat ion platform w as built to integrate planning information and simulation information of each phase and to reduce data redundancy and increase efficiency.Simulation software w as select- ed to suit to the integrated simulation platfom,and a simulation example is carried out to prove the effect of all the work above. KEY WORDS logistics;AS/RS;planning;simulation;set theory (上接第1018页) Preparation and electrochemical properties of Li4TisO 12 as an electrode material XUJiangfeng,LIJianling,LI Wensheng?,WANG Xindong) 1)Metallurgical and Ecological Engireering School,Uriversity of Science and Technology Beijng,Beijing 100083.China 2)Jinzhou Kaimei Power Co.Ltd.,Jinzhou 121000.China ABSTRACT Li4Tis012(M1)was obtained by solid reaction process with LiNO3 and TiO2 as reactants.XRD analy sis indicates that the main phase of the produced pow der is Li4TisO12 compound oxide with spinel structure. The initial discharge capacity of Ma 35mAgreaches 170mAh'g which is comparable to the theoretical capacity,and the first coulombic efficiency is 92%.M I performs well when it charges and discharges with high current density,and the discharge capacities reach 151.140 and 115mAh'gat 175.350 and 875mA'g respectively.The discharge capacities of M1,comparing with that of M2 prepared by conventional solid-state sintering of LiOH andT,inerease by5%10%and %at 175.350 and 875mAgepectively.Cydic voltammogram suggests that the electrode of M has lw polarization,good reversibility and high electrochemical activity.The charge transfer resistances of M measured through AC impedance are 16 and 200 after lithium in- sertion and extraction,respectively. KEY WORDS electrode material;Li4Tis01;LiNO3;material preparation;electrochemical propertiesAS/RS planning based on three-phase simulation ZHAO Ning, DONG Shaohua, WANG Guohua, DING Wenying, FENG Ailan Mechanical Engineering School, University of Science and Technology Beijing, Beijing 100083, China ABSTRACT To make AS/RS planning more scientific and reasonable, the set theory w as used to describe an AS/RS system, the goal of AS/RS w as quantified and the rule of AS/ RS planning w as pointed out .The whole process of AS/RS planning w as partitioned to three phases:prime planning, particular planning, and w orking planning .The simulation method suitable for each phase w as carried out to satisfy planning requirements of each phase .A three-phase integrated simulation platform w as built to integrate planning information and simulation information of each phase and to reduce data redundancy and increase efficiency .Simulation software w as select￾ed to suit to the integ rated simulation platfo rm, and a simulation example is carried out to prove the effect of all the w ork above . KEY WORDS logistics ;AS/RS ;planning ;simulation ;set theory ( 上接第 1018 页) Preparation and electrochemical properties of Li4Ti5O12 as an electrode material X U J iangfeng 1) , LI J ianling 1) , LI Wensheng 2) , WANG X indong 1) 1) Metallurgical and Ecological Engineering S chool, Uni versit y of Science and Technology Beijing, Beijing 100083, China 2) Jinzhou Kaimei Pow er Co.Ltd., Jinzhou 121000, China ABSTRACT Li4Ti5O12( M 1) w as obtained by solid reaction process with LiNO3 and TiO2 as reactants .XRD analy sis indicates that the main phase of the produced pow der is Li4Ti5O12 compound oxide with spinel structure. The initial discharge capacity of M1 at 35 mA·g -1 reaches 170 mAh·g -1 , which is comparable to the theoretical capacity , and the first coulombic efficiency is 92 %.M 1 performs well w hen it charges and discharges w ith high current density, and the discharge capacities reach 151, 140 and 115 mAh·g -1 at 175, 350 and 875 mA·g -1 , respectively.The discharge capacities of M1, comparing w ith that of M2 prepared by conventional solid-state sintering of LiOH and TiO2, increase by 5 %, 10 %and 26 %at 175, 350 and 875mA·g -1 , respectively .Cy clic voltammog ram suggests that the electrode of M 1 has low polarization, good reversibility and hig h electrochemical activity .The charge transfer resistances of M1 measured through AC impedance are 16 and 20 Ψafter lithium in￾sertion and extraction, respectively . KEY WORDS electrode material ;Li4Ti5O12 ;LiNO3 ;material preparation ;electrochemical properties · 1058 · 北 京 科 技 大 学 学 报 第 29 卷