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Evaluating the Impacts of Universal Two-Child Policy on Beijing's Population 期刊论文
JOURNAL OF SYSTEMS SCIENCE & COMPLEXITY, 2020, 页码: 18
Authors:  Liu, Qing;  Liu, Xiuli
Favorite  |  View/Download:25/0  |  Submit date:2020/06/30
Age structure  Beijing  cohort-component  population projection  universal two-child policy  
基于合理膳食结构的2020-2050年我国食物用粮需求测算 期刊论文
系统工程理论与实践, 2018, 卷号: 038, 期号: 003, 页码: 615
Authors:  刘庆;  刘秀丽;  汪寿阳
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基于自组织算法的股市预测 期刊论文
系统工程理论方法应用, 2005, 卷号: 014, 期号: 003, 页码: 231
Authors:  俞海;  刘庆伟
Favorite  |  View/Download:4/0  |  Submit date:2020/01/10