Subsequently,the grade diffusing process was described combining with the failure pervasion intensity,and the failure propagation paths and relevant key nodes with high pervasion ability were found with t.

A failure pervasion model was founded-fuzzy probability Petri net(FPPN)model which depicts the propagation and pervasion relation among failures,then failure pervasion intensity was introduced,the process of failure pervasion was depicted based on k-step fault pervasion principle and the pervasion intensity was expressed by a number.

Numerical simulation was carried out to describe the enhanced diffusion effect associated with the bombardment of High Current Pulsed Electron Beam (HCPEB).

Phase transition, enhanced diffusion and Y-Al alloy formation are studied using Y implantation with high current extracted from metal vapor vacuum arc (MEVVA) ion source.

Both two forms of mine gas in air have rising movement or trend: a part of mine gas or higher concentration of mine gas in air rises by buoyancy because of density difference; pressure diffusion of molecules of mine gas in air is made by pressure gradient, molecules of mine gas have rising movement or trend because down pressure gradient is usually produced by gravity.

According to the need for study on methane movement law in fully mechanizedsublevl caving stopes,the methane rising and pressure diffusion theory is put forward.

In paper optical absorption making colloid Cu2O by forced diffusion onflaking drip surface of float glass is discussed.