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Minjian Wang 보안공학연구지원센터 2014 International Journal of Multimedia and Ubiquitous Vol.9 No.11
In this paper, improved information entropy model and SOM neural networks are proposed for evaluating technical and tactical abilities of football teams in Euro 2012.Information entropy model is an effective performance evaluation tool. As a fine clustering tool, SOM has been used widely. The approach make input space cluster automatically and the learning process of clustering doesn’t need supervision. At the same time, eleven indicators that reflect technical and tactical ability of football teams are selected. Then, by means of entropy method and clustering analysis with statistic data of Euro 2012, characteristic and law is discovered between competition results and technical and tactical abilities, and a method for comprehensive assessment of technical and tactical abilities of football teams was proposed.
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Hua Zhang,Xiaoqing Bai,Minjian Hou,Lifei Wang,Qiang Zhang,Jianfeng Fan,Weiguo Li,Hongbiao Dong,Bingshe Xu 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.5
Influence of pre-introducing {10–12} extension twins on compressive deformation behavior of AZ31Mg alloy at differenttemperature was investigated. The compression tests were conducted along the normal direction of AZ31Mg alloy at roomtemperature, 100 °C, 200 °C and 300 °C with a strain rate of 1 × 10−3 s−1. The results indicated that the pre-introducing{10–12} extension twins strongly affected the yield strength, the peak strength and the strain hardening rate at middle-lowtemperature (≤ 200 °C). The twinned samples containing pre-introducing {10–12} extension twins exhibited smaller yieldstrength and larger peak strength than the as-received samples without {10–12} extension twins at temperature ≤ 200 °C. Forthe as-received samples, the strain hardening rate decreased gradually at different temperature. While for the twinned samples,the strain hardening behavior exhibited three distinct stages at temperature ≤ 200 °C. When compressing at 300 °C, the asreceivedand twinned samples exhibited similar compression flow curves and strain hardening rate curves. The continuousdynamic recrystallization (CDRX) was the main dynamic recrystallization (DRX) mechanism in the as-received sample whencompressing at 200 °C. The twin assisted DRX besides CDRX was also initiated in the twinned sample when compressingat 200 °C. While the DRX mechanism was transformed into the discontinuous dynamic recrystallization (DDRX) in boththe as-received and twinned samples when compressing at 300 °C.
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