The results show that the changes of cavity length-to-depth L/D and Mach number have dominant effect on cavity flow characteristics,and the variety of L/D and M can cause the change of the cavity flow field type.

Distribution of profits gained through carrying out VMI strategy based on market type and Cournot model;

The paper analyses the practices of building, developing and standardizing prospecting right market in China and discusses the market type, market order, market prices and market action in building prospecting right markets.

In terms of oversea strong ground motion records and the comparison of different site classification conditions,this paper states a changing method of all kinds site conditions based on Nakamura.