In this paper, a new method of error estimate for the generalized difference method of second order elliptic problems on triangle grids is given.
文章给出了三角网格上二阶椭圆问题广义差分方法的一种新的误差估计方法。
In GPS surveying, we usually need to compute closure difference of triangle or polygon, so as to search surveying gross errors and estimate GPS observing precision.
在GPS测量中，往往需要计算三角形、多边形闭合差，以便及时发现观测粗差、衡量GPS观测精度。
The groundwater flow is simulated with the seepage model of heterogeneity isotrope, and the partial differential equations are solved with finite difference scheme of irregular triangle net.
以非均质各向同性渗流模型仿真地下水流，用不规则三角网格有限差分法求解三维数值仿真模型。
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