From the basic principle of probalility theory, it can be deduced that the detailed wavelet coefficients sequence of an arbitrary distributed random noise sequence satisfies a normal distribution. 根据概率论的基本原理可以推断,随机序列的细节小波变换系数符合正态分布。
In the case of the emergent spectral intensity I_v, if it is regarded as the wavelength distribution of the photons escaping from solar atmosphere, the contribution function has been thought as the "probalility distribution" of these escape photons. 如果观测量是辐射强度I,在把I看成是由从大气表面逃逸出来的光子构成的同时,贡献函数便被赋予了光子随深度的概率分布的意义。