At the same time, it was studied that the effect of hop storage index (HSI) and deteriorative degree on evaluating hop freshness for hops which stored for different time.

Considering the examination result,the deterioration depth and omission depth of concrete have a remarkable increase in connection with the age,and the amounts of change are 0.

The phenomenon of stiffness deterioration(progressive damage) beyond the peak stress has been observed in cyclic loading tests of coals,rocks,concretes,soils and sands.

In order to overcome the imperfection and insufficiency of the conventional evaluate methods,the concept of relative degree of inferiority is introduced and a model based on the fuzzy judgment and relative inferiority degree is established.