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The Text Mining Analysis of Macau’s Participation in International Organizations
Wu Shianghau,Liu Chengkun,Shi Haoyu,Pang Chuan 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.11
In recent years, Macau has actively participated in international organizations according to the Macau Basic Law. After fifteen years of regaining sovereignty by China, Macau has faced some internal and external challenges. In order to comprehend the new policy directions regarding Macau’s participation in international organizations, this paper made the depth interviews and applied the text mining analysis to the interviews responses. Through applying the random forests model and fruit fly optimization algorithm to keywords classification, the study concluded several points related to Macau’s participation in international organizations.
High Temperature Plastic Deformation Constitutive Equation of a New Alloy for Piston Ring
Dejin Wei,Ruirui Liu,Chengkun Zuo,Haitao Zhou 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.6
Hot compression tests of a new CrMoV alloy for piston ring are conducted by Gleeble-3800 thermal mechanical simulationtester at the temperature of 950, 1000, 1050, 1100 and 1150 °C and strain rate of 0.01, 0.1, 1, 10 s−1. The results show thatthe true stress strain curves first go up to peak, and then go down to steady state in accord with characteristics of dynamicrecrystallization, indicating that the main softening mechanism of this alloy during hot deformation is dynamic recrystallization. The hot deformation behavior of this alloy is characterized by Arrhenius hyperbolic sine relationship with theactivation energy and stress index. On the basis of the true stress strain curves, the constitutive equation of the peak flowstress of this alloy is established. With the equation, the flow stress of this alloy can be predicated by numerical simulationfor a new type piston ring.