Based on BTW sandpile model, the conceptions of multi-quadrants, priority and apparent friction coefficient were proposed, two improved sandpile model were founded.

• 在BTW 沙堆模型的基础上,借助多象限、优先级和表观摩擦系数等概念,提出了两个改进算法,构建了两个更具真实物理意义的自组织临界性沙堆模型。