通过对传统的空间检索方法研究，提出了“基于空间数据扩展属性的检索”这一方法。
Then, owing to the study to traditional spatial index, a new method: spatial data extension index is raised.
扩展后的测线法在相同的现场节理调查数据下，可更加准确地估计岩体节理的平均迹长。
The extended scanline method can estimate mean trace length much more exactly in case there is not a great deal of data which are surveyed in field.
应用BP -神经网络法对数学模型进行修正，建立有限元数值模拟方法补充剔除数据并对数学模型适用范围进行扩展。
The mathematical models are amended by BP neural network algorithm, and method of finite element numerical simulation is used to compensate the removal data and extend the applied range.
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