ObjectiveThe effects of different ultrasonic impact treatment time on cross section microstructure, surface residual stress, surface microhardness, and corrosion resistance of 42CrMo4 steel sample was investigated.ResultsThe results showed that after ultrasonic impact, a large amount of plastic deformation occurred on the surface of 42CrMo4 steel s
Cara aktivasi arang menentukan kekhususan penggunaan arang aktif yang dihasilkan.Secara umum dikenal dua essie well nested energy cara aktivasi arang untuk menghasilkan arang aktif yaitu cara fisika dan kimia.Penelitian ini bertujuan untuk mengetahui struktur dan komponen penyusun arang dan arang aktif tempurung kemiri.Tempurung kemiri dikarbonisas
sophie allport zebra The paper considers the issue of balance in models used to determine economic growth (regional growth).Several indicators on lab or market and migration were selected and analyzed by the instrumentality of ANOVA and Ar cView.How to propagate social and economic changes from one region to another (from c enter to periphery or in
The problems of the concession development are considered, which is one of sophie allport zebra the forms of public-private partnership during developing difficult for access mineral deposits.Data on the historical experience of this form of management in the world and in Russia, including in mineral resources use, are given.The specifics of the im
Abstract Manta ray foraging optimization (MRFO) tends to get trapped in local optima as it relies on the direction provided by the previous individual and essie well nested energy the best individual as guidance to search for the optimal solution.As enriching population diversity can effectively solve this problem, in this paper, we introduce a hie