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Structure optimization of porthole die based on aluminum profile extrusion process numerical simulation WU Xiang-hong(吴向红)1, ZHAO Guo-qun(赵国群)1, LUAN Yi-guo(栾贻国)1, LOU Shu-mei(娄淑梅)1, MA Xin-wu(马... method is used to produce hollow aluminum profile. Due to the complexity of the porthole die structure and the material flow, it is very difficult to get ideal profile products with the firstly designed......
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J. Cent. South Univ. (2017) 24: 1817-1825 DOI: https://doi.org/10.1007/s11771-017-3590-x Improving cam profile design optimization based on classical splines and dynamic model XIA Bi-zhong(夏必忠), LIU... and Springer-Verlag GmbH Germany 2017 Abstract: Cam profiles play an important part in the performance of cam mechanisms. Syntheses of cam profile designs and dynamics of cam designs are studied at first......
一种序列家族Profile HMM寻优的PSO陈雄峰闽江学院计算机科学系 福建福州350108摘 要:针对在训练一个序列家族的Profile HMM时经常会得到局部最优HMM的问题,也就是说找到全局最优Profile HMM的概率不高.通过分析训练一个序列家族Profile HMM方法的特点和Profile HMM本身的结构特点提出了一种结合多个局部最优或次优Profile HMM来寻找最优模型的PSO算法,以提高序列家族Profile HMM寻优的概率.关键词:Profile HMM;PSO;HMM模型;......
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Effect of stress profile on microstructure evolution of cold-drawn commercially pure aluminum wire analyzed by finite element simulationY.K.Zhu1,Q.Wang1,J.P.Hou1,Z.J.Zhang1,G.P.Zhang1,Z.F.Zhang11.... process of commercially pure aluminum wire(CPAW)does not only depend on the nature of materials, but also on the stress profile. In this study, the effect of stress profile on the texture evolution......
动态压缩LY12铝合金微结构的XRD线形分析樊志剑1,宋振飞2,肖大武2,陈波0(1.四川省绵阳市工程物理研究院核物理与化学研究所2.中国工程物理研究院 流体物理研究所)摘 要:用Hopkinson杆实验装置在不同温度下对LY12铝合金进行动态压缩实验.采用XRD线形分析对压缩试样的微细观结构演化进行研究.由XRD的积分宽度确定试样中位错为刃型位错.衍射峰形的Fourier分析表明,在动态加载下,材料内部的位错密度在塑性流动的初期迅速趋于饱和,且随着测试温发的升高,位错密度呈递减趋势,同时亚结构的尺寸不断增加.......
aluminum foil with good profile less than 10 I (the relative differences in elongation of 0.01%) is produced using the profile control system in 1 400 mm cold rolling mill of aluminium strip and foil. Key... mill of aluminium strip and foil. The system has been in operation for above one year and pre-coated aluminum foil whose good profile is less than 10 I (I unit is a key index for strip flatness, 10 I......
HC轧机辊型曲线优化李俊洪1,邓菡2,周三保2,邓澄2,周波2,李玉和3(1.四川省攀枝花市 攀枝花钢铁研究院2.新钢钒股份有限公司,四川攀枝花 6170623.攀枝花大学,四川攀枝花 617000)摘 要:HC轧机采用中间辊轴向窜动技术,使轧机的横向刚度显著增加,提高了板形控制能力.但由于中间辊轴向窜动后,在工作辊与中间辊,中间辊与支撑辊间形成接触压力峰值,导致轧辊局部磨损及带材表面质量问题.建立了HC轧机板形和断面形状计算模型,研究了支撑辊及工作辊辊型曲线对辊间接触压力分布的影响规律,在此基础上优化了122......