convolution

This method can avoid the repetition and pretermission of integrating interval (or summarizing interval), especially in the convolution computation of multi-partition function.

该方法能有效地克服区间（或求和区间）的重复和遗漏问题，特别是在多段有值函数卷的计算中更显示出其优越性。

With convolution integral, a new formulation for describing the relation of soft X-ray reflectivity of multilayer with the different energy Monochromaticity of incident light is deduced.

利用数学卷,论上推导出一个在入射光不同单色性下精确计算多层膜反射率的公式。