通过将Levy过程的跳的大小看做是粒子的出生位置，我们希望能寻找到Levy过程中一些新的分枝结构。 更进一步的，我们还研究相应的分枝过程的树和尺度极限。我们还希望通过随机偏微分方程来构造分枝过程的流，使得这些流与一些树值马氏过程的相对应，来研究随机流和树值马氏过程的收敛与刻画。

By regarding the size of a jump of a Levy process as the birth sites of a particle, we hope to investigate some new branching structures embedded in Levy processes. Furthermore, we will study the trees and the scaling limits of the corrsponding branching processes. We also want to construct some flows of branching processes corresponding to some tree-valued Markov processes by using stochastic partial differential equations. Then we consider the characterizations and convergence of those stochastic flows and tree-valued Markov processes.