积分变换在分数阶扩散过程中的应用
Applications of integral transforms in fractional diffusion processes
摘要:
从时空分数阶扩散方程的Fourier-Laplace表示出发,研究了其柯西问题的基本解(格林函数)的标度性和相似性.然后,利用Mellin变换,导出了复平面上格林函数的Mellin-Barnes积分的一般表示.这使我们能够获得一个合适的计算形式的格林函数在空间-时域和分析其概率解释。
英文摘要:
The fundamental solution (Green function) for the Cauchy problem of the space-time fractional diffusion equation is investigated with respect to its scaling and similarity properties, starting from its Fourier-Laplace representation. Then, by using the Mellin transform, a general representation of the Green function in terms of Mellin-Barnes integrals in the complex plane is derived. This allows us to obtain a suitable computational form of the Green function in the space-time domain and to analyse its probability interpretation.
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