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obviously corresponds to lead; the B group is apart from tantalum, niobium and titanium, also contains tin, iron and antimony because crystal-chemical properties of these elements are close to tantalum... is hydrometallurgy [10-13]. This method allows us to achieve high recovery of elements, select metals with close properties (for example, Nb and Ta), reduce energy consumption and environmental pollution......
characteristics [J]. Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2020: 0954410020904832. DOI: 10.1177/0954410019843726. [14] SONG Wen-yan, ZHANG Dong-qing, SHI......
University, 2017. [12] 刘 燕. 新型机械搅拌喷气精炼装置的气泡微细化及分散的研究[D]. 沈阳: 东北大学, 2008. LIU Yan. Bubble disintegration and dispersion in new type mechanical stirring injection refine equipment[D]. Shenyang: Northeastern......
, XIA M, ZHU T T Z L, HU Q P. Plastic deformation behavior of spray formed superalloy FGH100 [J]. Mater Sci Eng A, 2017, 699: 156-164. DOI: 10.1016/j.msea.2017.02.063. [18] COURTNEY T H. Mechanical......
the electroslag remelting process. CHEN et al [12] proposed that during the ESR process of Inconel 718 alloy under Ar atmosphere, the mechanical mixture of 20 wt% Al, 20 wt% Al2O3, 20 wt% CaF2, and 40 wt.... Effect of oxygen content on fatigue properties of carburized gear steel [D]. Wuhan: Wuhan University of Science and Technology, 2019. (in Chinese) [8] XU Jin, JIANG Xian-she, CHEN Zai-zhi, CHEN Jing-rong......
have caused serious casualties, much mechanical damage, and delays to projects, leading to considerable economic losses. For example, seven fatalities and one injury, as well as the total destruction...-induced microseismicity depends on numerous factors, e.g., geological conditions, in situ stresses present, properties of the rockmass, excavation technique, and support measures employed. As a result......
can be named as the gravitational failure zone. These two sub-zones are developed with different failure mechanisms. However, they are in contact with each other through geometric and mechanical......
neurons, and one output variable. The physical properties (liquid limit, plastic limit, plasticity index, 0.075 mm passing percentage, maximum dry density, optimum moisture content), state variables... properties of soils and model coefficients. YAO et al [16] analyzed the influence of matric suction and stress state on resilient modulus and proposed the predictive equation of resilient modulus......
], numerical analysis [20-23], physical modelling [24, 25], and in situ monitoring [26-29]. BJERRUM [30] pointed out the influence of creep on soil properties and proposed a diagram that permits a qualitative... and stress of stratum in consideration of various influence factors. MINKOFF et al [38] points that accurate prediction requires both mechanical deformation and fluid flow modeling for complex non-linear......
with weakly coupled vertical and lateral dynamics [J]. Mechanical Systems and Signal Processing, 2019, 115: 570-592. DOI: 10.1016/ j.ymssp.2018.06.019. [45] CHENG Y C, CHEN C H, HSU C T. Derailment......