Discussion on the degradation of SOFC and its fast judgement;

And based on the analysis of choice and gauging of site factors,the paper puts forward the applied fast-estimation rule of aptness of single site factor and the applied fast-estimation synthetic measure of aptness of multiple site factors,which are simple but practical,and can be used to adjudge the aptness of favored tree for suitable land quickly in forest management.

Ultrasonic fast identification for faulty welded joint defects of auto-body spot welding;