Rock-breaking efficiency of full-face rock tunnel boring machine (TBM) is closely related to the performance of the disc cutter and the characteristics of the rock mass.In the point of view of mesomechanics, the particle flow code (PFC) is used to establish a numerical model of the rock mass and the disc cutter, and the process of TBM disc cutter i
Abstract The graphene family materials are two-dimensional staggered monolayers with a gapped energy band structure due to intrinsic spin-orbit coupling.The mass gaps in these materials can be manipulated on-demand via biasing with a static electric field, an off-resonance circularly polarized laser, or an exchange interaction field, allowing the m
Light and soil water availability may limit carbon uptake of trees in tropical rainforests.The objective of this work was to determine how photosynthetic traits of juvenile trees respond to variations in rainfall seasonality, leaf nutrient content, and opening of the forest canopy.The correlation between leaf nutrient content and annual growth rate
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Data on total weight and standard length of freshwater bream and perch, two of the most abundant fish Walkers species in the Volga River basin, were collected monthly from April 2016 to May 2017.Fish were caught using gill-nets with 50 and 80 mm mesh sizes.Linear regression analysis of log-transformed values was performed.Regression slope and inter