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高维多任务回归问题的置信区间 被引量:1
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作者 马源莉 李阳 徐建军 《中国科学技术大学学报》 CAS CSCD 北大核心 2023年第4期22-30,I0008,共10页
多元响应变量和预测变量之间的回归问题目前已被广泛应用于生物医学和经济学等领域。本文主要研究高维多任务学习问题中未知系数矩阵的统计推断问题。基于两步投影技术,我们按行构建了统计量。该方法通过消除重要信号的影响提高了推断... 多元响应变量和预测变量之间的回归问题目前已被广泛应用于生物医学和经济学等领域。本文主要研究高维多任务学习问题中未知系数矩阵的统计推断问题。基于两步投影技术,我们按行构建了统计量。该方法通过消除重要信号的影响提高了推断效率。此外,通过建立该方法的渐近正态性,我们为未知系数矩阵的所有元素生成了相应的置信区间。最后,模拟研究和实际数据分析都验证了该方法的有效性。 展开更多
关键词 统计推断 置信区间 两步投影技术 偏差修正 特征筛选
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Generating prototypical residential building geometry models using a new hybrid approach 被引量:1
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作者 yuanli ma Wu Deng +3 位作者 Jing Xie Tim Heath Yeyu Xiang Yuanda Hong 《Building Simulation》 SCIE EI CSCD 2022年第1期17-28,共12页
Building prototyping has regularly been used in building performance analyses with statistically feasible models.The novelty of this research involves a new hybrid approach combining stratified sampling and k-means cl... Building prototyping has regularly been used in building performance analyses with statistically feasible models.The novelty of this research involves a new hybrid approach combining stratified sampling and k-means clustering to establish building geometry prototypes.The research focuses on residential buildings in Ningbo,China.Seventeen small residential districts(SRDs)containing 367 residential buildings were systemically selected for survey and data collection.The stratified sampling used building construction year as the main parameter to generate stratification.Floor numbers,shape coefficients,floor areas,and window-to-wall ratios were used as the four observations for k-means clustering.Based on this new approach,nine building geometry prototypes were identified and modelled.These statistically representative prototypes provide building geometrical information and characteristic-based evaluations for subsequent building performance analysis. 展开更多
关键词 building prototyping geometry models new hybrid approach Ningbo China
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