Firstly, DEM model of this district generated by GIS and TM image was overlapped, and fetch relative data.

首先，运用GIS相关软件生成研究区的DEM模型并与其TM影像进行叠加，提取相关数据。

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Moreover, a new technique for calculating the strain and stress of DEM model has been proposed by using the concept of meshless method.

通过无网格技术，改进了离散元法应变、应力的计算方案，使其能够在连续介质大变形的计算中得到更为准确的应变、应力分布。

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