Research on optimal design of fracturing based on proppant indexes in low permeability oil reservoirs;

The article explains the converter vessel-to-trunnion ring connecting procedure required by quick change of the furnace shell and the reinforce number, position and plane as well as shell bearings and clamping unit structure.

On the Support Functions and Chen Submanifolds;

According to the properties of Boolean Radon transform and the theory of envelope, the problem of crosssectional reconstruction of vessel has been solved by the means of support function and difference method.

New application of supporting function in the disc typed cam mechanism with negative radius roller follower