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分区间（或求和区间）的重复和遗漏问题，特别是在多分段有值函数的计算中更显示其优越性。

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.

利用数学分,理论上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。