Super depth digital microscope was employed to observe the macro-/micro-structure of Coleoptera's elytra.The non-smooth surface textures of elytra have shown superior performance of friction reduction and lubricat...Super depth digital microscope was employed to observe the macro-/micro-structure of Coleoptera's elytra.The non-smooth surface textures of elytra have shown superior performance of friction reduction and lubrication.Bionic models of regular hexagonal convex texture and circular concave texture inspired by the beetle were established and verified by numerical calculations and simulations.Further tribological experiments were performed and the results show that the circle texture has the lowest coefficient,which is consistent with the numerical calculations.The research may be further applied to new bionic surface texture designs and also work as a biological template for new bionic inventions.展开更多
In this paper, shapes and surface textures of quartz grains in 13 layers of a core (NP95 1) collected from a continental slope at the Antarctic Prydz Bay were quantitatively and statistically analyzed. The quartz gr...In this paper, shapes and surface textures of quartz grains in 13 layers of a core (NP95 1) collected from a continental slope at the Antarctic Prydz Bay were quantitatively and statistically analyzed. The quartz grain surfaces exhibit the characteristics caused by intense glaciation and a weaker chemical solution precipitation, indicating the sediments are mainly morainic debris under a low energy marine environment. The obtained quantitatively statistical results of the assemblages of surface textures caused by the chemical solution precipitation are well correlated to the analytical results of micropaleontologic analysis and can be used to better explain the changes of sedimentary environment and paleoclimate occurred in the marine zone concerned.展开更多
基金supported in part by the National Natural Science Foundation of China(Nos.51175249,51475230)
文摘Super depth digital microscope was employed to observe the macro-/micro-structure of Coleoptera's elytra.The non-smooth surface textures of elytra have shown superior performance of friction reduction and lubrication.Bionic models of regular hexagonal convex texture and circular concave texture inspired by the beetle were established and verified by numerical calculations and simulations.Further tribological experiments were performed and the results show that the circle texture has the lowest coefficient,which is consistent with the numerical calculations.The research may be further applied to new bionic surface texture designs and also work as a biological template for new bionic inventions.
文摘In this paper, shapes and surface textures of quartz grains in 13 layers of a core (NP95 1) collected from a continental slope at the Antarctic Prydz Bay were quantitatively and statistically analyzed. The quartz grain surfaces exhibit the characteristics caused by intense glaciation and a weaker chemical solution precipitation, indicating the sediments are mainly morainic debris under a low energy marine environment. The obtained quantitatively statistical results of the assemblages of surface textures caused by the chemical solution precipitation are well correlated to the analytical results of micropaleontologic analysis and can be used to better explain the changes of sedimentary environment and paleoclimate occurred in the marine zone concerned.
