This article forecast the tendency of Nanjing residents' income gap in the following years using GM (1, 1) model integrating the qualitative analyses.
结合对未来几年南京居民收入差距趋势的定性分析，利用GM(1,1)灰色预测模型对南京居民收入差距的发展趋势进行了定量预测。
A measuring method of coal self combustion tendency is suitable for the qualitative analysis and classification of the self combustion tendency of coal bed in a coal mine.
一种煤自燃倾向性的测定方法，适用于煤矿煤层的自燃倾向性的定性与分类。
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