然后引入省际人口迁移因素，在计算出年龄别净迁移率的基础上，预测了2001-2050年间陕西省人口规模及结构；
Then , with the inter-provincial migration factor introduced and the rate of net migration calculated , the population size and structure of Shaanxi Province between 2001 and 2050 has been predicted .
净迁移率