Pearson correlation coefficient is very helpful for us to measure the relationship of two random variables.However,there is much localization about Pearson correlation index.In this paper,we propose several new measur...Pearson correlation coefficient is very helpful for us to measure the relationship of two random variables.However,there is much localization about Pearson correlation index.In this paper,we propose several new measurements to evaluate correlation;Moreover,we also point out that there are affiliations with copula.展开更多
为解决基坑坍塌风险评价等级问题,优化模糊综合评价模型以提高基坑风险等级评估的准确性,从而采取有效治理措施控制基坑风险。首先,采用层次模型建立基坑坍塌风险评价指标体系,定性指标采用量化等级进行定量转化,然后引入模糊集理论建...为解决基坑坍塌风险评价等级问题,优化模糊综合评价模型以提高基坑风险等级评估的准确性,从而采取有效治理措施控制基坑风险。首先,采用层次模型建立基坑坍塌风险评价指标体系,定性指标采用量化等级进行定量转化,然后引入模糊集理论建立评价指标模糊关系,针对传统层次分析法(analytic hierarchy process,AHP)不能处理模糊性及不完整性信息的缺点,采用D数理论改进层次法(D-AHP)确定一级指标主观权重,提高了在赋权过程中专家对指标的偏好性;为提高评价体系中风险指标权重的精确性,综合熵权法(entropy weight method,EWM)和指标相关性权重确定法(criteria importance through intercriteria correlation,CRITIC)的赋权优点,利用改进博弈论对熵权法和CRITIC法求出的二级指标权重进行组合赋权,得到二级指标客观权重,线性耦合主客观权重得到最终权重,从而建立基坑坍塌风险评价模型,根据最大隶属度原则确定基坑风险等级;同时,建立基于施工监测数据结合改进博弈论组合赋权的逼近理想解排序法(technique for order preference by similarity to an idea solution,TOPSIS)评价模型进行对比验证。结合昆明5号线某地铁基坑为例进行风险评价,结果表明:模型评价结果与实际工程情况相吻合,验证了改进博弈论组合赋权结合模糊集评价模型的正确性和可靠性,同时验证了组合赋权的合理性,为基坑风险评估提供新的参考方法。展开更多
文摘Pearson correlation coefficient is very helpful for us to measure the relationship of two random variables.However,there is much localization about Pearson correlation index.In this paper,we propose several new measurements to evaluate correlation;Moreover,we also point out that there are affiliations with copula.
文摘为解决基坑坍塌风险评价等级问题,优化模糊综合评价模型以提高基坑风险等级评估的准确性,从而采取有效治理措施控制基坑风险。首先,采用层次模型建立基坑坍塌风险评价指标体系,定性指标采用量化等级进行定量转化,然后引入模糊集理论建立评价指标模糊关系,针对传统层次分析法(analytic hierarchy process,AHP)不能处理模糊性及不完整性信息的缺点,采用D数理论改进层次法(D-AHP)确定一级指标主观权重,提高了在赋权过程中专家对指标的偏好性;为提高评价体系中风险指标权重的精确性,综合熵权法(entropy weight method,EWM)和指标相关性权重确定法(criteria importance through intercriteria correlation,CRITIC)的赋权优点,利用改进博弈论对熵权法和CRITIC法求出的二级指标权重进行组合赋权,得到二级指标客观权重,线性耦合主客观权重得到最终权重,从而建立基坑坍塌风险评价模型,根据最大隶属度原则确定基坑风险等级;同时,建立基于施工监测数据结合改进博弈论组合赋权的逼近理想解排序法(technique for order preference by similarity to an idea solution,TOPSIS)评价模型进行对比验证。结合昆明5号线某地铁基坑为例进行风险评价,结果表明:模型评价结果与实际工程情况相吻合,验证了改进博弈论组合赋权结合模糊集评价模型的正确性和可靠性,同时验证了组合赋权的合理性,为基坑风险评估提供新的参考方法。
