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。

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This paper educed the error calculation formula of the mine directional Angle by using the method of guidance relation connected with the triangle observation.

本文采用导向联系三角形观测方法，导出了矿井定向角度的误差计算公式。

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The passive orientation of IRST is a dynamic triangle measurement. For the fixed target, the orientation error can be minimized by multiple measurements and the least squares(LS) method.

IRST的被动定位实质上是一个动态三角测量法，对于固定目标，可以利用多次测量和最小二乘法降低定位误差。

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