It provides an essential condition for the research on the relations between recall ratio and precision ratio.
为进一步研究查全率与查准率的关系提供了必要的条件。
To enhance recall ratio and precision ratio of information retrieval, the paper designs the model of spam filtering based on semantic grid.
本文以增强语义信息，提高搜索的查全率和查准率为目标，设计了基于语义网格的垃圾邮件过滤模块。
Experiment results prove that this system can improve recall ratio and precision ratio effectively and then attain a satisfying personal retrieving effect.
实验结果证明，该系统可以提高查全率和查准率的有效，然后达到一个满意的个人检索效果。
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