[I] according to study area grouping interval;
[ii] to select the initial number of clusters, according to the principle of maximum density point selecting initial cluster centers;
[iii] will be offered for each of the fissure distribution from the smallest clustering center, forming a new cluster grouping;
[iv], calculate and determine the cluster grouping occurrence matrix to obtain a new clustering center;
[v] repeat steps 3 and 4, until all basic fixed clustering center;
[vi] save the group as a result, the update number of clusters, repeat steps 2 to 5;
[vii] on the basis of the objective function to validity check of the grouping results, to determine the optimal grouping;
[viii] to discrete fracture, the optimal grouping optimization grouping result,
In this article USES the objective function is as follows:
Type, namely Xie - Beni index expressions on molecular represents all fractures with various advantage group of center distance, the sum of the denominator represents the advantages of group center distance is the minimum value, taking the minimum value of the index of the group number is optimal,
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