High heat loading performance of actively cooled W/Cu FGM-based components

A functionally graded material-based actively water-cooled tungsten-copper mockup with a dimension of 30 mm×30 mm×25 mm was designed and fabricated by infiltration-brazing method. The thicknesses of the pure W layer and W/Cu graded layer were 2 and 3 mm, respectively. High heat flux tests were performed on the mockup using an e-beam device. There is no damage occurring on the joint after heat loading at 5 MW/m2. The temperature on the pure W surface is less than 500℃ after irradiation for 100 s at 5 MW/m2, while the temperature on the brazing seam/copper surface is around 200℃.     

线性It随机系统的矩方程及其应用

给出了具有Ｋｒｏｎｅｃｋｅｒ＇ｓ积和Ｋｒｏｎｅｃｋｅｒ＇ｓ 和的线性Ｉｔｏ随机系统的二阶矩方程的矩阵。在此基础上,得出了线性Ｉｔｏ随机系统的均方渐近稳定性的充要条件。对时不变随机系统,这个充要条件恰好与系统的系数矩阵相关的必然矩阵的Ｈｕｒｗ ｉｔｚ性质相同。并给出了代数ＳＴＩＬＳＳ,以判断时不变线性Ｉｔｏ随机系统的均方渐近稳定性。