·244· 北京科技大学学报 2005年第2期 [4)]张长水，沈刚，阁平凡.解Job-Shop调度问题的一个遗传 [)唐洪华.薄板坯连铸连轧流程的物流调控仿真：[学位论 算法.电子学报，1995.23(7)：2 文].北京：北京科技大学，2002.128 [)唐立新，杨自厚，王梦光.炼钢一连铸生产的计划与调度 [8]田盛丰，人工智能原理与应用，北京：北京理工大学出版 结构.东北大学学报（自然科学版），1996,17(6)666 社，1993.286 [刘青，贺东风，吴晓东，炼钢系统的运行原则与调控策略 [9]陈国良，王煦法，庄镇泉，等.遗传算法及其应用.北京：人 钢铁，2002,37（增刊）：435 民邮电出版社，1996.360 Continuous casting and rolling process scheduling system of two-strand thin slabs based on hybrid genetic algorithm HE Dongfeng,TIAN Natyuan Metallurgical and Ecological Enginneering School,University of Science and Technology Beijing,Beijing 100083,China ABSTRACT Schedule rules for two-strand thin slab casting and rolling were established.Based on the charac- teristic of the casting and rolling process,a kind of coding,crossover operator,mutation operator and the concept of amendment operator for the genetic algorithm were proposed.In the genetic algorithm,the schedule rules were in- troduced into the modeling of initial population and the operation of amendment.A scheduling system of two-strand thin slab casting and rolling was developed by using the schedule rules and the genetic algorithm.This system can solve the dynamic schedule problem of two-strand thin slab casting and rolling and optimize production manage- ment. KEY WORDS thin slab;continuous casting and rolling;production control;dynamic scheduling;hybrid genetic algorithm 公@地酸受酒公减滋强运驾深区包誉海@度区四戳色花在酒武过酒型度@@@图沟盛海双②速每程地液风液孩速感新送送武成 From Rare Metals,2005,24(1):100 Defects in LaCuOa and LalsSro.14CuO,single crystals YANG Wei,JIA Liansuo,CHEN Xiaolong,and WANG Cong 1)Center of Materials Physics and Chemistry,School of Sciences,Beihang University,Beijing 10008,China 2)Institute of Physics and Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100080,China ABSTRACT LazCuO,and LaSraCuO,single crystals were obtained by traveling solvent floating zone method. There were five kinds of defects in these single crystals:cracks,inclusions,gas bubbles,unhomogeneous distribu- tion of Sr,and substructures.CH,COOH aqueous solution was used to etch these single crystals,and the etch-pit density was calculated.The formation mechanism of these defects was discussed.It is suggested that the good prep- aration of raw materials and the stringent growth conditions play an important role in growing high quality single crystals. KEY WORDS defects:TSFZ method:etch-pit density一 2 4 4 . 北 京 科 技 大 学 学 报 2 0 0 5 年 第 2 期 4[ ] 张长水 , 沈 刚 , 阎平 凡 . 解 Job 一 S h叩 调度 问题 的 一个遗 传 算法 . 电子 学报 , 1 9 9 5 , 2 3 ( 7) : 2 5[ ] 唐立 新 , 杨 自厚 , 王 梦光 . 炼 钢 一 连铸 生产 的计划 与调 度 结 构 , 东北大 学 学报 ( 自然科 学版 ) , 19 9 6 , 17 ( 6 ) : 66 6 历」刘 青 , 贺东 风 , 吴晓 东 . 炼 钢系 统 的运行 原则 与调控 策 略 . 钢 铁 , 2 00 2 , 3 7 (增刊 ) : 4 3 5 7[ ] 唐洪 华 . 薄板坯 连铸 连 轧流程 的物 流 调控 仿真 : [学位 论 文 ] . 北京 : 北 京科技 大 学 , 2 0 0 2 . 12 8 8[] 田 盛丰 . 人工 智 能原理 与应 用 . 北 京 : 北 京理 工大 学 出版 社 , 19 9 3 2 86 四] 陈 国 良 , 王 煦法 , 庄镇 泉 , 等 . 遗传 算法 及其应 用 . 北京 : 人 民邮 电出版社 , 19 9 6 . 3 6 0 C o n ti n u o u s c a s t i n g an d r o l li n g P r o c e s s s e h e du l in g s y s te m o f tw o 一 s tr an d ht in s lab s b a s e d o n h y b r id g e n e t i e a lg o r i th m 厅百 D o 月 gfe n g, IT 刁N 乃几之 iy au n M e t a ll u gr i e a l a们 d E e o l o g i e a l Egn in e er in g S e h o o l , nU i v e r s ity o f s e i e n c e a 们d eT c hn o l o gy B e ij in g , B e ij 呢 1 00 0 8 3 , C h in a A B S T R A C T S e he du l e m le s of r tw o 一 s tr a n d t h in s lab e a s t i n g a n d r o ll i n g w er e e st ab li s h e d . 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K E Y W O R D S ht in s l a b : e o in i n uo u s c a s t in g 叔n d r o l li n g ; rP o d u e t i o n e o ntr o l ; d y n am ic s比 e du lin g : hy b ir d g e n e t i c a lg o r it ih l l F or m R aer 人企at ls, 2 0 丘 2 4 {1) : 10 0 D e fe e t s i n L氏 C u O 4 an d L a l , 8 6 S r 。 , 1 4 C u O 4 s in g l e e yr s t a l s YA N G 肠i ,气J阴 L i a n s u o l), 〔万忍N . iX a o l o褚 ), a n d 环月 N G OC gn , , l ) C e ent r o f Nl a t e t ia l s Phy s ic s an d C b e m i st r y , S c b {〕 o l o f s o i enc e s , B e il 田l g U] l iV ers ity , B e ij in g 10 0 0 8 3 , C h in a 2 ) I ns it 吹 o f P hy s i e s a cn 兀C e l飞t e r ofr C O l l d e l l s e d M a t e r p hy s i e s , hC in es e A e ad e 们l y o f s c i e n e e s , B e ij ign l o 0 0 8 D 。 hC in a A B S T R A C T L 氏C u O 、 an d L a , 沼6 S 0r 14 C uO 4 s in g l e e yr s t a l s w e r e o b t a i n e d b y tr va e l ign s o l v e nt fl o at i n g z o n e m e ht o d . 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