This paper presents a systematic introduction of function demand,action mechanism,and structure characteristics of the ink receiving layer of inkjet printing media.

Two parameters,the density smoothness(m)and the saturation density(D∞),are proposed to evaluate the ink receptivity of offset newsprint.

In order to properly evaluate travel information acceptance level of transit passengers, this paper analyzes travel information particularly from two aspects of infor- mation transmission and information searching.

The acceptable level of environmental risk means the acceptable level of accident occurrence frequency from projects which own environmental risk unavoidably.