The paper studied the harm of particle in hydraulic fluid to hydraulic system and analyzed the reason of the contamination particles creating.

Study of the Influence of Contaminated Particles on Inter-Ring Gas Pressure;

01 GPa,and the result showed that debris contamination had simultaneous effect on the characteristic life and the life exponent of Si3N4 , which reduced the fatigue life of L10 an.

This paper analyzes quantitatively the effect of debris contamination on the Si3 Na rolling contact fatigue life of silicon nitride and the forming mechanisms of rolling contact fatigue of silicon nitride lubricated by the clean oil and the contaminated oil.

The Study on the Segmentation of Circle-Like Particle Images;

Firstly, this thesis introduces some pre-processing, image segmentation and binary image processing techniques about particle image processing and analysis.

In the particle images segmentation,the objects are always touched or overlapped each other,which makes it hard for image consequent processing.

Due to the different influence of inhalable particle pollutant upon the transmissivity between visible channel and near infrared channel of NOAA satellite, a difference vegetation index I_(DV) is built.