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upper die 4 Results of optimization 4.1 Even forepart The simulation results for the optimized die show that uniform material flow can be obtained and a profile with an even forepart is extruded... 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......
Formation mechanism and evolution of surface coarse grains on a ZK60 Mg profile extruded by a porthole dieJianwei Tang1,Liang Chen1,Guoqun Zhao1,Cunsheng Zhang1,Xingrong Chu21. Key Laboratory... microstructure formed on the cross-section of the extruded profile. On the profile surface, abnormal coarse grains with an orientation of <11-20> in parallel to ED(extrusion direction) appeared......
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;......
of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha 410083, China) Abstract: The extruded profile’s microstructure and properties of a self...-developed zinc-based alloy is obtained when heated to 350 ℃, extruded with a ratio of 17.5, extruded at the rate of 20 mm/s; the tensile strength σb of the extruded chain profile is 375 MPa. The profile has......
Plastic deformation behavior of Mg97Zn1Y2 extruded alloys K. HAGIHARA1, A. KINOSHITA1, Y. SUGINO1, M. YAMASAKI2, Y. KAWAMURA2, H.Y. YASUDA1, Y. UMAKOSHI3 1. Division of Materials... extruded alloy containing the long-period stacking ordered phase, the so-called LPSO-phase, with a volume fraction of 24%-25%, were examined by compression tests and cyclic tension-compression deformation......
Texture evolution of extruded AZ31 magnesium alloy sheets YU Kun(余 琨), RUI Shou-tai(芮守泰), WANG Xiao-yan(王晓艳), WANG Ri-chu(王日初), LI Wen-xian(黎文献) School of Materials Science and Engineering...; Abstract: The evolution of texture during the annealing and hot rolling process of extruded AZ31 magnesium alloy sheets......
Trans. Nonferrous Met. Soc. China 31(2021) 1885-1901 Effects of single- and multi-stage solid solution treatments on microstructure and properties of as-extruded AA7055 helical profile Cun-sheng...-precipitation (HTPP) and multi-stage solution treatment (MST) on the microstructure, mechanical properties and corrosion resistance of the as-extruded 7055 aluminium alloy (AA7055) helical profile were......
: The ram speed and the billet temperature are the primary process variables that determine the quality of the extruded magnesium profile and the productivity of the extrusion operation. The optimization... incorporated to manufacture an extruded profile of industrial significance. It was aimed at establishing the correlations between the process variables, the peak pressure and the extrudate temperature......
Numerical analysis of dimension precision of U-shaped aluminium profile rotary stretch bending YU Zhong-qi(于忠奇), LIN Zhong-qin(林忠钦) School of Mechanical Engineering, Shanghai Jiao Tong... of aluminium profile RSB part was studied by finite element method. The numerical simulation of the U-shaped aluminium profile RSB was carried out, and the validity of the simulation was checked. Parametric......
J. Cent. South Univ. Technol. (2010) 17: 824-829 DOI: 10.1007/s11771-010-0562-9 Load distribution model and voltage static profile of Smart Grid SUN Qiu-ye(孙秋野), LI Zhong-xu(李钟旭), YANG Jun(杨珺... load distribution model was established. Based on this model, exact expressions of feeder voltage profile with single and double DGs were derived and used to analyze the impact of DG’s location......