Nanophase CuO powder was prepared with urea and copper nitrate by hydrothermal method.The effects of temperature on yield and particle sizes were studied.The results showed that the yield increased while the particle ...Nanophase CuO powder was prepared with urea and copper nitrate by hydrothermal method.The effects of temperature on yield and particle sizes were studied.The results showed that the yield increased while the particle sizes decreased with the increase of temperature.The sample particles were spherical and the average particle size was between 25 and 60 nm.展开更多
Sensitivity analysis and topology optimization of microstructures using strain energy-based method is presented. Compared with homogenization method, the strain energy-based method has advantages of higher computing e...Sensitivity analysis and topology optimization of microstructures using strain energy-based method is presented. Compared with homogenization method, the strain energy-based method has advantages of higher computing efficiency and simplified programming. Both the dual convex programming method and perimeter constraint scheme are used to optimize the 2D and 3D microstructures. Numerical results indicate that the strain energy-based method has the same effectiveness as that of homogenization method for orthotropic materials.展开更多
文摘Nanophase CuO powder was prepared with urea and copper nitrate by hydrothermal method.The effects of temperature on yield and particle sizes were studied.The results showed that the yield increased while the particle sizes decreased with the increase of temperature.The sample particles were spherical and the average particle size was between 25 and 60 nm.
基金National Natural Science Foundation of China （90405016, 10676028） 973 Program （2006CB601205）+1 种基金 863 Project （2006AA04Z 122） Aeronautical Science Foundation （04B53080, 2006ZA 53006） and 111 Project （B07050）
文摘Sensitivity analysis and topology optimization of microstructures using strain energy-based method is presented. Compared with homogenization method, the strain energy-based method has advantages of higher computing efficiency and simplified programming. Both the dual convex programming method and perimeter constraint scheme are used to optimize the 2D and 3D microstructures. Numerical results indicate that the strain energy-based method has the same effectiveness as that of homogenization method for orthotropic materials.
