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J. Cent. South Univ. (2012) 19: 1226-1233 DOI: 10.1007/s11771-012-1133-z Roll shifting strategy with varying stroke and step in hot strip mill LI Wei-gang(李维刚)1,2, LIU Xiang-hua(刘相华)3, GUO Zhao-hui(郭...., Shanghai 201900, China ? Central South University Press and Springer-Verlag Berlin Heidelberg 2012 Abstract: A new roll shifting strategy with varying stroke and varying step was investigated. Two......
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STEP模型基于数据仓库的关系数据库映射实现魏群1,2,段国林1,蔡瑾1,周桂霞11. 河北工业大学机械学院2. 河北理工大学理学院摘 要:STEP是描述产品信息模型的最有效方法,但目前它的数据库实现主要面向对象,不能与以关系数据库为底层数据库的系统(如ERP,PDM)很好地集成.对STEP模式的EXPRESS表示的不同数据类型进行了分析,利用数据仓库,数据字典等技术详细阐述一种新的EXPRESS数据模式向关系数据库映射的规则和方法.通过内存工作方式下的产品数据管理器一实体实例仓库,实现STEP模型数据的关系数据库持久化.关键词:STEP;数据仓库;EXPRESS;关系数据库;数据字典;......
Growth Defects in Langasite Crystals Observed with White Beam Synchrotron Radiation Topography Huang Wanxia1,Wang Xuping2,Zhu Peiping1,Zhao Hongyang2,Wang Jiyang2,Zhang Jianxiu2,Hu Xiaobo2... single crystal was grown by the Czochralski method and its perfection was assessed by white beam synchrotron radiation topography. It is found that the growth core and the growth striations......
基于STEP中性文件的属性图形表示法研究王林军兰州理工大学机电工程学院 甘肃兰州 730050摘 要:提出了属性图形法的基本概念和表示方法,论述了映射STEP中性文件到属性图形的过程,计算以及实现等方法,为提出一个具体的CAPP系统奠定了基础.关键词:STEP;属性图形;CAPP;......
Phase-field simulation of lamellar growth for a binary eutectic alloy LI Xin-zhong(李新中)1, 2, LIU Dong-mei(刘冬梅)1, SUN Tao(孙 涛)2, SU Yan-qing(苏彦庆)1, GUO Jing-jie(郭景杰)1, FU Heng-zhi(傅恒志)1... while large lamella resulted from disorder growth with low interfacial velocity. The investigated interface velocities indicate that with fast solidification to form regular lamella, a disorder growth......
Growth restriction effects during solidification of aluminium alloys CHEN Zhong-wei(陈忠伟), HE Zhi(何 志), JIE Wan-qi(介万奇) State Key Laboratory of Solidification Processing... be quantified by the growth-restriction parameter Q, and Q possesses the better correlation with the grain size. Based on the constitutional undercooling generated by the growth of an adjacent grain during......
Molecular dynamics simulation of bending crack initiation and growth of single crystal aluminiumSHAN De-bin(单德彬), YUAN Lin(袁 , 林), GUO Bin(郭 斌)(School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)Abstract:Molecular dynamics (MD) simulation was employed to research the mechanism of bending crack initiation and growth of single crystal aluminium......
of workpieces [4], anodizing step process [5], technical parameters [6,7] and sealing methods [8,9]. The growth of the oxide film on matrix is affected by both of these two parts leading to a decreased anti...Trans. Nonferrous Met. Soc. China 24(2014) 3023-3030 Growth and corrosion behaviors of thin anodic alumina membrane on AA5083 Al-Mg alloy in incalescent medium Jia-yu WANG, Cheng LI, Shun-li ZHENG......