共搜索到14009条信息,每页显示10条信息,共1401页。用时:0小时0分0秒812毫秒
......
experiments. Key words: hydromechanical deep drawing; inverse modeling; aluminum alloy; simulation 1 Introduction Sheet hydroforming has many advantages such as high drawing ratio, good part surface... much attention in the industrial field of aerospace and automatization[1-3]. Sheet hydroforming includes many branches including so called hydro- forming[4-6], deep drawing with hydraulic counter......
dimension of rock fragments increases. Key words: rockburst; loading rate; deep circular tunnel; true-triaxial test; V-shaped notch Cite this article as: SI Xue-feng, HUANG Lin-qi, GONG Feng-qiang, LIU Xi... J. Cent. South Univ. (2020) 27: 2914-2929 DOI: https://doi.org/10.1007/s11771-020-4518-4 Experimental investigation on influence of loading rate on rockburst in deep circular tunnel under true......
J. Cent. South Univ. (2021) 28: 728-746 DOI: https://doi.org/10.1007/s11771-021-4641-x A survey of deep learning-based visual question answering HUANG Tong-yuan(黄同愿)1, 2, YANG Yu-ling(杨钰玲)1, YANG..., especially deep learning, the research on visual question answering field has made significant progress, with important theoretical research significance and practical application value. Therefore......
drawing test for four different coating materials and two different lubricants was performed as the reduction ratio increased from 10% to 30%. Materials used for a substrate in this study are plain... used[6]. The change of seizure resistance upon the usage of coating type has been mainly evaluated by performing a test for friction coefficient. MATUSZAK[7] and PESCH et al[8] used a sheet-drawing test......
J. Cent. South Univ. (2016) 23: 145-149 DOI: 10.1007/s11771-016-3057-5 Voice activity detection based on deep belief networks using likelihood ratio KIM Sang-Kyun1, PARK Young-Jin2, LEE Sangmin1, 3... technique is proposed to improve the performance of voice activity detection (VAD) by using deep belief networks (DBN) with a likelihood ratio (LR). The likelihood ratio is derived from the speech......
; 文献标识码: A On-line determination technology on Lankford parameter of deep drawing aluminum sheets MAO Wei-min1, MA Quan-cang1, FENG Hui-ping1, CHEN Chang-yun2, LI Ji-bin2 (1. State Key... (Group) Co. Ltd., Chongqing 401326, China) Abstract: A rapid and accurate determination technology on Lankford parameter r of deep drawing 3104 aluminum sheets was investigated. The amount of pole......
; 温热冲压; 数值模拟; 极限拉深比; 变压边力 中图分类号: TG386.3 文献标识码: A Numerical simulation and experimental study of warm deep drawing of AZ31 magnesium alloy sheet CHANG Qun-feng1, LI Da-yong1, PENG Ying-hong1, ZENG... of deep drawing 为刚体, 全部采用4节点壳单元划分网格. AZ31镁板室温下的材料参数和模拟参数列于表3. 100, 150, 200, 250和300℃的材料参数由上述的单拉实验给出. 表3 数值模拟参数 Table 3 Parameters of numerical simulation 3.2 温度对成形性能的影响 由图3(b......
of geohazards during deep excavations in karst regions with caverns: A case study [J]. Engineering Geology, 2015, 195: 16-27. [4] JIANG H M, LI L, RONG X L, WANG M Y, XIA Y P, ZHANG Z C. Model test... J. Cent. South Univ. (2019) 26: 1747-1754 DOI: https://doi.org/10.1007/s11771-019-4130-7 Collapse mode of rock mass induced by a concealed karst cave above a deep cavity HUANG Fu(黄阜), ZHANG Min(张敏......
红, 曾小勤. AZ31镁合金盒形件变压边力温热拉延工艺[J]. 中国机械工程, 2006, 17: 16-18. CHANG Qun-feng, LI Da-yong, PENG Ying-hong, ZENG Xiao-qin. Warm deep drawing of square parts of AZ31 magnesium alloy sheet adopting variable.... ZHANG Zhi-chao, XU Yong-chao, YUAN Shi-jian. Deformation behavior of deep drawing of 5A06 aluminum alloy plate[J]. The Chinese Journal of Nonferrous Metals, 2015, 25(7): 1764-1772. [12] 李文娟. AZ31B镁合金......