This paper introduced dimensional parameters and nondimensional parameters in time domain analysis,built multi-data fusion fault diagnosis system,which included data level fusion module,feature level fusion module and decision level data fusion module,adopted the neuronal networks to conquer the shortcoming of neural network and to solve the abuse of evidence theory which is difficult to gain BPA.

In order to improve the performance of information retrieval system, a retrieval algorithm combining multi-query data fusion with positive relevance feedback is presented.

A solution was brought forward which used multi-source data fusion to organize the production of navigation map.

Scheme of multi-level data fusion for wireless sensor networks;