...： R ==相关文献总量被检出相关文献量查准率（precision ratio）： P ==被检出文献总量未检出相关文献量漏检率（omission ratio）： M ==相关文献总量被检出非相关文献量误检率（miss ratio）： N ==被检出文献总量caa+baa+cac+bab+ • 查全率的计算存在明显的...
The detectionprecision is high, theincidence, the fallout ratioandtheomission ratio of the non-drilling throughhole on the glassproduct are reduced, and the laborintensityis alsoreduced.