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基于属性邻接图的加工特征识别邬国秀,刘克非襄樊学院机械与汽车工程学院摘 要:研究了从中性文件STEPAP203文件中得到加工几何特征的方法.首先分析了STEPAP203文件的组织结构,然后从中提取有关面和面之间的连接信息,用属性邻接图表示出来.讨论了属性邻接图的分解以及基于特征子图匹配的特征识别方法.用此特征识别方法实现了中等复杂程度机械零件的特征识别.关键词:STEP文件;特征识别;属性邻接图;......
Particle growth mechanism of nanocrystalline zirconia powder during high temperature heat treatment LIU Chun-bo(刘纯波), YU Lian-sheng(于连生), JIANG Xian-liang(蒋显亮) School of Materials Science... of constituent phases before and after the high temperature heat treatment. Nano-particle growth behavior was also investigated. The results show that the major constituent phase of the agglomerated......
Growth behavior of interfacial compounds in galvanized steel joints with CuSi3 filler under arc brazing YU Zhi-shui(于治水), LI Rui-feng(李瑞峰), QI Kai(祁 凯) College of Materials Engineering, Shanghai... of the galvanized steel and copper filler. From this, the schematic cycle of the interface growth behavior of Fe/Si compounds and the fragmentation behavior of whisker-like intermetallic compounds are developed......
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J. Cent. South Univ. Technol. (2010) 17: 830-835 DOI: 10.1007/s11771-010-0563-8 A novel weighted evolving network model based on clique overlapping growth YANG Xu-hua(杨旭华)1, WANG Bo(王波)1, 2, SUN...; Abstract: A novel weighted evolving network model based on the clique overlapping growth was proposed......
. Therefore, the alloys with low fusion entropy can grow according to the way of lateral extension growth of every step. {111} plane exposes at interface with a direction parallel to the direction...) dendrites. The facet growth of crystals at solid/liquid interface was responsible for the origin of twinned dendrites during the weak local convection, and high thermal gradient and medium solidification......
Improvement of uniformity in cultivation environment and crop growth rate by hybrid control of air flow devicesBAEK Min-Seon1, KWON Sook-Youn2, LIM Jae-Hyun1(1. Department of Computer Science... cultivation beds. However, it has a problem of irregular crop growth due to temperature deviation at upper and lower beds and increases in energy consumption by a prolonged cultivation period. In this work, air......
Bond population analysis on combination of favorable growth unit of Al(OH)3 crystals CHEN Qi-yuan(陈启元), WU Zheng-ping(吴争平), YIN Zhou-lan(尹周澜) , LI Jie(李 洁) School of Chemistry...; Abstract: The quantum chemical calculation on four representative combination modes of the favorable growth unit Al6......
Comparative study on effects of Tween-80 and sodium isobutyl-xanthate on growth and sulfur-oxidizing activities of Acidithiobacillus albertensis BY-05 ZHANG Cheng-gui(张成桂), XIA Jin-lan(夏金兰), ZHANG...; Abstract: Effects of two typical surfactants, Tween-80 and sodium isobutyl-xanthate (NaIBX), with different concentrations on the growth and sulfur-oxidizing activities of a new strain......