The results indicate that the deformation of the coarse-grained materials results from reciprocating deformation and residual deformation related to the cyclic loading time,confining pressure,and dynamic stress ratio.

Fault diagnosis on reciprocating pumps by using rough sets and wavelet neural networks;

Diagnosis of plunger wear of reciprocating pump based on multiplex parameters;

Analyses of the curvature radius of the cam outline in constant flow reciprocating pump;

Based on systematical analysis and study about the existed reciprocating-pump valve design theory and virtual manufacturing technology,study the high-pressure reciprocating-pump valve virtual design technique according to practical experience in design and improvement about reciprocating-pump of manufacturers.