管理学 查准率 释 precision 查准率 衡量信息检索系统检出文献准确性的指标。即检出的相关文献量与检出的文献总量的比率。 理学 模型选择 释 Precision 查准率 查准率是二分类问题中用来衡量学习器预测性能好坏的常用指标，其定义为预测为正例且实际也为正例的样例数目与所有被预测为正例的样例数目的比值，查全率越高，则学习器的预测性能越好。
人工智能 机器学习 释文 precision rate 查准率
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