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一种新的空间权重矩阵构造及其应用 被引量:1
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作者 黄精 张辉国 胡锡健 《统计与决策》 CSSCI 北大核心 2017年第21期75-78,共4页
空间权重矩阵的构造一直是地理学、空间计量经济学和医学等领域中的难点和热点问题。权重矩阵合适与否,将直接关系到模型的最终估计结果。文章基于渗透搜索算法,通过局部Moran′I的比较,得到新的"邻接"关系区域,并结合基于经... 空间权重矩阵的构造一直是地理学、空间计量经济学和医学等领域中的难点和热点问题。权重矩阵合适与否,将直接关系到模型的最终估计结果。文章基于渗透搜索算法,通过局部Moran′I的比较,得到新的"邻接"关系区域,并结合基于经济距离的权重构造出新的权重矩阵。 展开更多
关键词 渗透搜索算法 空间权重矩阵 空间自相关 新疆能源消费
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Probability calculation of rebars corrosion in reinforced concrete using css algorithms 被引量:3
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作者 Mohsen-Ali Shayanfar Mohammad-Ali Barkhordari Mohammad Ghanooni-Bagha 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第8期3141-3150,共10页
Reinforcement inside the concrete is protected from corrosion and its damages until several years after the construction. After corrosion initiation, the cross section of reinforcement begins to reduce and often load ... Reinforcement inside the concrete is protected from corrosion and its damages until several years after the construction. After corrosion initiation, the cross section of reinforcement begins to reduce and often load bearing of the reinforced concrete structure will be reduced significantly. Corrosion of reinforcements in concrete in polluted and contaminated areas can occur in two ways: chloride and carbonation. In this work, meta-heuristic approach of charged system search(CSS) is used to calculate corrosion occurrence probability due to chloride ions penetration. The model efficiency is verified by comparing the available examples in technical literature and results of Monte Carlo analysis. According to the analyses performed, using different probabilistic distributions regardless of probabilistic moments based on real distribution leads to diverse results. In addition, influence of each effective parameter in corrosion occurrence varies by changing other parameters. 展开更多
关键词 reinforced concrete reliability index chloride diffusion CARBONATION charged system search (CSS) optimization
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