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对权数概念的探讨 被引量:1
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作者 魏和清 《统计与决策》 北大核心 2001年第11期17-17,共1页
关键词 统计学 人工权数 统计方法 自然权数
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Ecological Security Assessment of the Yancheng National Nature Reserve based on GIS 被引量:4
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作者 LI Haiping GAO Ge LI Jing 《Journal of Resources and Ecology》 CSCD 2020年第1期38-49,共12页
This study used remote sensing and GIS to analyze the landscape pattern changes in the Yancheng Nature Reserve from 1983 to 2018,established an evaluation index system based on the regional natural-socio-economic comp... This study used remote sensing and GIS to analyze the landscape pattern changes in the Yancheng Nature Reserve from 1983 to 2018,established an evaluation index system based on the regional natural-socio-economic complex ecosystem security pattern,and then analyzed the spatial characteristics of ecological security changes and discusses reasons for these changes.The results show that the landscape pattern changed dramatically from natural landscape to a mixture of natural landscape and artificial landscape from 1983 to 2018 due to the intensification of human activities.At present,the ecological security status of the protected areas is not optimistic.From the perspective of the survival status of red-crowned cranes,the protected areas are suitable.However,due to the increase of human activities and policy adjustments,the habitat of red-crowned cranes is fragmented.The red-crowned crane currently gathers in localized areas such as the core area and the buffer zone.We should pay more attention to management,policy development and the environmental awareness of local residents.At the same time,it is necessary to reduce the intensity of human activities within the reserve. 展开更多
关键词 ecological security assessment pressure-state-response(P-S-R)model analytical hierarchy process(AHP) index weight Yancheng Nature Reserve
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