It is proposed an optimal split-scale model of multi-scale segmentation based on object-oriented analysis methods,and made the experiment of image segmentation and the evaluation of segmentation quality.

In this paper, by using the principal component analysis and optimal sorting method, we get a solution for the assessment of educational practise and then give the calculation of a example.

Mathematics geological study is also applied to stratigraphic classification using multi\|variable optimum partition.

<abstract>e comprehensive method of the element - stratum , optimum division and the filtration in classifying forma tions in Mesozoic of Jiyang depression is tried out .