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基于ASSETS的长江口海域富营养化评价——2002年以来人为影响压力趋势分析 被引量:11
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作者 纪焕红 叶属峰 刘星 《海洋环境科学》 CAS CSCD 北大核心 2008年第A01期12-14,共3页
利用总人为影响的比值评价了2002年以来人类活动对长江口海域的压力及其变化趋势,结果表明:6 a间总人为影响比值均大于0.8,属于人为影响级别中最高的一种,但总体呈现出降低的趋势;人为影响压力的降低与长江径流量及其无机氮物质通量有... 利用总人为影响的比值评价了2002年以来人类活动对长江口海域的压力及其变化趋势,结果表明:6 a间总人为影响比值均大于0.8,属于人为影响级别中最高的一种,但总体呈现出降低的趋势;人为影响压力的降低与长江径流量及其无机氮物质通量有直接关系,此外,长江三峡工程的拦洪、蓄水等功能的正常运转及"十五"期间长江上游的生态建设工程等亦在一定程度上减轻了长江口的污染负荷。 展开更多
关键词 assests 长江口 富营养化 评价 总人为影响
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Empirical Research on Farmer's Breaching Behavior in Order Contract 被引量:1
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作者 Guifang CHAO Mojing CHEN Xinxin DING 《Asian Agricultural Research》 2016年第12期43-47,共5页
In " leading enterprise + farmer" cooperation model,farmer's behavior of breaching contract exists generally. In this paper,from the angle of incomplete contract,the influencial factors of farmer breakin... In " leading enterprise + farmer" cooperation model,farmer's behavior of breaching contract exists generally. In this paper,from the angle of incomplete contract,the influencial factors of farmer breaking contract are analyzed. It is found that farmer sex,age,culture degree and farming period have obvious effects on the behavior of breaching contract. Under regulating effect of relationship quality,farmer assest specificity,exogenous uncertainty and endogenous uncertainty affect farmer's breaking behavior. That is,the higher the farmer assest specificity,the lower the farmer breaching tendency; higher exogenous uncertainty causes that farmer is easy to generate breaching behavior; higher endogenous uncertainty causes that farmer is also easy to take breaching behavior. 展开更多
关键词 Farmer breaching Relationship quality Assest specificity UNCERTAINTY
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