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Foreign Trade Survey Data: Do They Help in Forecasting Exports and Imports? 期刊论文
JOURNAL OF SYSTEMS SCIENCE & COMPLEXITY, 2022, 页码: 24
作者:  Bai Yun;  Wang Shouyang;  Zhang Xun
收藏  |  浏览/下载：65/0  |  提交时间：2023/02/07
ARIMAX  artificial neural network  composite index  forecasting  foreign trade  Granger causality test  survey data  
A Survey of the Representations of Rational Ruled Surfaces* 期刊论文
JOURNAL OF SYSTEMS SCIENCE & COMPLEXITY, 2021, 页码: 21
作者:  Yuan Chun-Ming;  Perez-Diaz, Sonia;  Shen Li-Yong
收藏  |  浏览/下载：155/0  |  提交时间：2021/04/26
Birational transformation  characterization  implicitization  parametrization  rational ruled surface  reparametrization  
Lower Bounds of Optimal Exponentials of Thickness in Geometry Rigidity Inequality for Shells 期刊论文
JOURNAL OF SYSTEMS SCIENCE & COMPLEXITY, 2021, 页码: 17
作者:  Yao Pengfei
收藏  |  浏览/下载：133/0  |  提交时间：2021/04/26
Geometry rigidity inequality  shell  nonlinear elasticity  Riemannian geometry  
Tool Orientation Optimization and Path Planning for 5-Axis Machining 期刊论文
JOURNAL OF SYSTEMS SCIENCE & COMPLEXITY, 2020, 页码: 24
作者:  Yuan, Chunming;  Mi, Zhenpeng;  Jia, Xiaohong;  Lin, Fengming;  Shen, Liyong
收藏  |  浏览/下载：133/0  |  提交时间：2021/01/14
5-axis CNC machining  flat end cutter  tool path planning  tool posture optimization  
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
作者:  Liu, Qing;  Liu, Xiuli
收藏  |  浏览/下载：168/0  |  提交时间：2020/06/30
Age structure  Beijing  cohort-component  population projection  universal two-child policy