We investigate how the barb of bird feathers is changed along both the rachis and barb.To investigate the microstruc-tures and the mechanical behaviors of barbs
We report pulsed laser diode(LD)end-pumped acoustic Q-switched Tm:YAG laser,Tm:LuAG laser,and Tm:LuYAG laser and the physical properties and spectra of Tm:YAG,T
We investigated the influence of an inserted bar on the hopper flow experimentally.Three geometrical parameters,size of upper outlet D1,size of lower outlet Do,