问个基础的问题，

窦育民成电

问个基础的问题，请专家释疑，多谢了。
Our method achieves a comparable result to [22]. We observe
that our method is the only one with no difference in
detection rates at 0.3 FPPI and 0.4 FPPI. The curve of our
method increases sharply at the beginning and reaches the
peak of the detection rate before 0.3/0.4 FPPI.

好像看到好几篇文章都是在 0.3/0.4 FPPI的地方讨论，难道有 0.3/0.4 什么特别的地方？请指教。