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In order to study the geological factors which impact penetrating rate of TBM, three-dimensional discrete element model 3DEC was used to build simulated models on rock fragment by TBM cutter. The influence of different geological conditions on TBM penetrating rate was analyzed. The surrounding rock in west route of South-to-North Transfer Project was classified according to the drill ability of TBM...
Copulas represent a useful approach to understanding and modeling dependent components of random variables that allows us to focus explicitly on the dependence structure. This paper aims to seek out the most appropriate copula which can model the dependence structure and measure the risk characteristic for the tail dependent asset returns. Based on the empirical data from the financial market, we...
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