Aimed at solving the problem that currently grading of plant diseases are mainly based on eyeballing,the paper developed a new disease grading method based on computer image processing.

Study on disease analysis and consolidance of stone arch bridge under its construction;

Slope disease analysis and treatment design on one section of Da-Yun expressway

Through the disease analysis and load bearing capacity appraise on Huazhou Bridge to was built fifty years ago,this paper analysis the disease causes,appraise a load bearing capacity of the bridge,and presents the maintenance and reinforcement plans.