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基于熵效率模型的环渤海地区海洋经济系统韧性研究 被引量:19
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作者 孙才志 曹强 邹玮 《宁波大学学报(理工版)》 CAS 2020年第1期10-18,共9页
可持续发展理论难以深入解释区域经济为何能在扰动因素下保持增长,而“韧性”是解析区域经济演化的重要概念.本文基于演化韧性视角,提出海洋经济系统韧性概念,建立以信息熵为基础的评价体系,并构建熵投入和熵产出的熵效率模型,应用SBM... 可持续发展理论难以深入解释区域经济为何能在扰动因素下保持增长,而“韧性”是解析区域经济演化的重要概念.本文基于演化韧性视角,提出海洋经济系统韧性概念,建立以信息熵为基础的评价体系,并构建熵投入和熵产出的熵效率模型,应用SBM模型测算环渤海地区17个沿海城市在16年间的海洋经济系统熵效率,最后分析了海洋经济系统熵变过程及韧性的演化规律与机制.研究表明2000~2015年环渤海地区:(1)海洋经济系统的发展与韧性水平的提升由系统熵流与熵产生所形成的负熵所驱动;(2)海洋经济系统韧性经历由慢到快、由差到优的发展过程,目前韧性整体相对较好,城市间的差异依然显著;(3)海洋经济系统的完善与韧性的提升主要依赖于海洋经济系统压力输出的持续减小,以及适应与更新能力的提升,而受生产力水平与扰动因素的影响较小;(4)为保持海洋经济持续健康增长,应在强调可持续发展的同时,注重提升海洋经济系统的韧性水平. 展开更多
关键词 韧性 海洋经济 熵效率模型 演化韧性 环渤海地区
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Measurement and Comparison of Urban Haze Governance Level and Efficiency based on the DPSIR Model:A Case Study of 31 Cities in North China 被引量:10
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作者 XIAO Qinlin TIAN Chao +2 位作者 WANG Yanjun LI Xiuqing XIAO Liming 《Journal of Resources and Ecology》 CSCD 2020年第6期549-561,共13页
In the decisive stage of developing of a moderately prosperous society in all aspects,hazy weather has become a major obstacle to the further advancement of China.Therefore,improving the level and efficiency of haze g... In the decisive stage of developing of a moderately prosperous society in all aspects,hazy weather has become a major obstacle to the further advancement of China.Therefore,improving the level and efficiency of haze governance has become essential.Based on the DPSIR model,this paper builds a haze governance level and efficiency index system using the entropy method and the super-efficiency data envelope-analysis(DEA)model to analyze the data for 31 cities in North China from 2007 to 2016.From the aspects of spatial differences and influence factors influencing the comparative analysis,the results are as follows.(1)During the investigation period,the level and efficiency of city haze governance in North China showed a trend of fluctuation and decline,with obvious stages in their characteristics.Haze governance efficiency is much higher than its level,and its mean value reaches the DEA level which indicates that it is effective.(2)A significant regional gradient difference occurs between these two aspects.The haze governance level presents a convex distribution pattern of"east low–middle high–west low",while the haze governance efficiency presents a concave distribution pattern of"east high–middle low–west high".(3)The regression results show that economic growth has a negative effect on both haze governance level and efficiency.By contrast,the industrial structure has a positive effect on haze governance level and efficiency,but the significance of its effect on these two is different.On this basis,policy suggestions are proposed for improving the level and efficiency of haze governance in various cities in North China. 展开更多
关键词 haze governance level haze governance efficiency entropy method super-efficiency DEA model
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