常驻人口户籍管理系统DELPHI开的的,还不错.学习用-permanent residence registration management system population DELPHI open, is not bad. Learning

人口灰色预测模型可以在数学建模中应用，预测人口数量的变化，灰常灰常灰常有用。-gm grey prediction may not be perfect but it s useful u know. used in mathmatical test for population prediction. very very useful