The paper reports sunthetically the Cocene fauna of the Messel Pit Fossil site of Germany, in detail, including its rich taxanomic composttions, geological and
Based on the relationship between the diameter and buried depth of goaf,the authors establish the forward modeling by Res2dmod and inverse the model by Res2dinv
In order to investigate the permeability of porous media,it is necessary to figure out the property of wave propagation in this medium. The authors calculated t