摘要
分析了搜索引擎在信息获取中效率低下的原因,在Lafferty等人提出的风险表达形式化模型基础上,提出了风险表达的认知模型,并对该模型中风险函数R的可计算问题进行了分析和讨论。
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.
出处
《科技情报开发与经济》
2007年第3期107-109,共3页
Sci-Tech Information Development & Economy
基金
高校自然科学基金资助项目(编号:YZQ05009)论文
关键词
信息获取
风险认知模型
风险函数
information retrieval
cognition model of risk
risk function
