Automatic wood defects recognition based on texture extraction and support vector machine technology

This paper first defined gray morphology filtering methods based on mathematical morphology, followed with examples of a wood defect image treated before and after open, as well as closed, filtering treatments.

Effects of dilation angle on failure process and mechanical behavior for rock specimen with random material imperfections;

For heterogeneous rock with initial random material imperfections in plane strain compression,the effects of end-restraint on the failure process and the stress-strain curve are numerically modeled,using FLAC.

In uniaxial plane strain compression,the failure processes,precursors,acoustic emissions and overall deformational characteristics of rock specimens with initially random material imperfections were modeled using FLAC.

Numerical simulation of influence of material imperfection on strain localization;

Effects of positions of material imperfection at right edge of rock specimen under plane strain compression on initiation and evolution of shear bands as well as stress-strain curves of rock specimen were modeled numerically by FLAC.