搜索结果: 1-6 共查到“统计预测理论 systems”相关记录6条 . 查询时间(0.25 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：集装箱港口货运需求预测研究：以环渤海三大港口为例
集装箱港口 货运需求预测 环渤海 三大港口
2023/4/28
本文基于TEI@I理论框架，提出了适用于港口物流货运复杂系统的TEI@I的综合集成预测模型，并基于环渤海三大港口青岛港、天津港和大连港集装箱吞吐量数据,预测和分析了TEI@I的港口物流货运量的集成预测理论框架的各部分。预测结果表明，基于TEI@I集成预测模型的效果远远优于单独模型的预测结果，方向变化统计量(Dstat)的评价结果从65%-75%提高到了90%以上，对主要决策者方向性的判断更有实际意...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Prediction When Factors are Weak
因素较弱 预测 宏观经济预测
2023/5/5
In macroeconomic forecasting, principal component analysis (PCA) has been the most prevalent approach to the recovery of factors, which summarize information in a large set of macro predictors. Nevert...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Multiclass Sparse Discriminant Analysis Incorporating Graphical Structure among Predictors
预测变量 图形结构 多类稀疏 判别分析
2023/5/9
In the era of big data, many sparse linear discriminant analysis methods have been proposed for the classification and variable selection of the high-dimensional data. In order to solve the multiclass...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：粮食主产区粮食产量预测模型
粮食主产区 粮食产量 预测模型
2023/5/16
报告主要介绍东北四省区等粮食主产区的粮食产量预测的模型情况，以及模型的应用、改进空间等等。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：How to capture tourists' search behavior in tourism forecasts？A two-stage feature selection approach
旅游预测 游客 搜索行为 两阶段 特征选择方法
2023/5/16
Search engine data have been widely used and shown to be useful in tourism demand forecasting. However, considering of the vast amounts of search keywords, how to better capture the tourists' attentio...
Geodesics and Recurrence of Random Walks in Disordered Systems
Random environment with stationary conductances Geodesicsin in first-passage percolation model Recurrence and transience
2009/4/29
In a first-passage percolation model on the square lattice $Z^2$, if the passage times are independent then the number of geodesics is either $0$ or $+infty$. If the passage times are stationary, ergo...