I was not bom happy.As a child,my favourite hymn~([圣歌])was:“Weary of~([厌烦]) earth and laden with~([载满]) my sin~([罪恶]) age of five,I reflected that,if I
Our new method makes use of a CAD-based automatic modeling tool,MCAM,for geometry modeling and ray tracing of particle transport in method of characteristics(MO