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With expansion of university enrollment, the number of students increases every year, and information of their courses, scores and normal performance records also shows rapid expansion. More and more data of undergraduates have to be stored in database or data warehouse with the capacity increasing. It is difficult for teachers to finish comprehensive evaluation of over ten thousand students at the...
In view of the high operation cost of Gini index for SLIQ algorithm while searching the optimal split scheme, and from the objective distribution of data, the thesis introduces the concept of density of data distribution. The new SLIQ algorithm, improved on the base of Gini index, is adopted in synthetic evaluation. The results in the example demonstrate that the number of the Gini index is reduced...
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