The chemical vapor infiltration(CVI) process in fabrication of carbon-carbon composites is very complex and highly inefficient, which adds considerably to the c
The genetic diversity of the 34 populations of wild rice Oryza meyeriana Baill.distributed in Yunnan Province,China was analyzed using 13 inter-simple sequence
The mountainous areas (mountain,plateau and hilly area) cover more than 85% of the total land territory of China.Nature and humanity in very mountainous area ha
The research area is situated in the western part of Tarim basin,which includes Awati depression and Bachu uplifted block. It underwent three times processes of