Image geometry distortion is an important technical standard in B-mode ultra-sound diagnosis system.This paper investigates the cause of image distortion inphas
<正>In this paper,the evolutions of flow pattern and sediment transportation at a 90°open-channel confluence with different discharge ratios(q~*) of the tr
Bone morphogenetic protein (BMP)is an efficient bone-inducing protein whichmainly exists in bone matrix.The implants of Bovine BMP (bBMP)extracted frombovine bo