Research on the Risk Representation Model of Two Kinds of Uncertainties in the Information Retrieval
DU Wen-hu · Sci-Tech Information Development & Economy · 2007
This paper analyzes on the reasons of the lower efficiency of search engineer in the information retrieval,based on the risk representation formalization model advanced by Lafferty and others,advances the cognition model of the risk representation,and analyzes and discusses on the calculable problem of risk function R in this model.