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基于生物进化的产业创新生态系统演化及仿真分析 被引量:1
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作者 王芳 饶德坤 +1 位作者 游静 何晓敏 《科技管理研究》 CSSCI 北大核心 2018年第23期86-93,共8页
结合"创新3.0",基于技术、市场和社会生态位构造产业创新生态系统框架;采用生物进化理论描述各生态位影响变量之间的关系,构建产业创新生态系统的演化模型,并通过8家新材料上市公司的演化来验证模型的适用性。演化仿真结果表... 结合"创新3.0",基于技术、市场和社会生态位构造产业创新生态系统框架;采用生物进化理论描述各生态位影响变量之间的关系,构建产业创新生态系统的演化模型,并通过8家新材料上市公司的演化来验证模型的适用性。演化仿真结果表明:技术生态位与企业发展并非线性相关,企业应根据政策和市场情况确定合适的研发费用率;市场生态位与企业发展正向相关,但对以研发费用率为代表的技术生态位影响不大;社会生态位与企业发展正向相关,但受限于市场和技术生态位,在其到达一定程度后对企业发展影响较小。 展开更多
关键词 产业创新生态系统 生物进化 演化分析
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The Ecosystem Service Function of Shandong Xiajin Yellow River Ancient Mulberry Trees System and Its Effect on Regional Ecosystem 被引量:2
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作者 孙雪萍 王斌 +1 位作者 刘某承 刘伟玮 《Journal of Resources and Ecology》 CSCD 2016年第3期223-230,共8页
The Shandong Xiajin Yellow River Ancient Mulberry Trees System is a model of desertification control in the floor area in the Luxibei Plain,and of sustainable development.The current study about ancient mulberry trees... The Shandong Xiajin Yellow River Ancient Mulberry Trees System is a model of desertification control in the floor area in the Luxibei Plain,and of sustainable development.The current study about ancient mulberry trees in Xiajin county is mainly qualitative representation,lack of quantitative research.In addition,the relevant important ecological functional assessment should not only confine to quantitative assessment which illustrate the current condition,but also analyze the eco-service changes,derived from ecosystem structure develop,from the time dimension.Based on quantitative eco-service assessment of the ancient mulberry tree group,this paper intend to conduct a comprehensive analysis of ecological functions of ancient mulberry group focuses on the perspective of system structure and function evolution.Quantitative evaluation results show that the system has significant eco-efficiency in water conservation,reducing sediment loss,adjust atmosphere,etc.On timescale,thanks to mulberry cultivation,ecosystem structure and services have also undergone a corresponding change.In ecosystem structure:Planting pioneer trees such as mulberries and other species which can tolerate hostile site conditions,improves the micro-environment.This makes it possible for other crops to grow.The mixed forests and the combination of forestry and agriculture protect biodiversity.What's more,they make the structure of the ecosystems more robust,giving full play to their functions.In terms of ecosystem services:ecosystem services of Xiajin Yellow River Ancient Mulberry Trees have shown diversified development.And its main function has transferred from supply products to leisure and entertainment functions. 展开更多
关键词 Yellow River old river course ancient mulberry trees ecosystem services ecosystem structure evolution eco-service change
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Impacts of regional land-use patterns on ecosystem services in the typical agro-pastoral ecotone of northern China 被引量:1
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作者 Huimin Chen Yu Zhao +6 位作者 Xiao Fu Mingfang Tang Mingjie Guo Shiqi Zhang Yu Zhu Laiye Qu Gang Wu 《Ecosystem Health and Sustainability》 SCIE 2022年第1期534-553,共20页
A comprehensive understanding of the spatial-temporal evolution and driving forces on ecosystem services(ES)is essential for the agro-pastoral ecotone’s ecological security in northern China.However,the land-use patt... A comprehensive understanding of the spatial-temporal evolution and driving forces on ecosystem services(ES)is essential for the agro-pastoral ecotone’s ecological security in northern China.However,the land-use pattern(LULC)agglomeration with spatial differentiation in the pastoral and agricultural areas has been rarely concerned.Taking distinct LULC(1980-2018)in Chifeng as an example,we compared four crucial categories of ESs with InVEST.Using SEM,we further contrasted the effects of several variables on regional ES variations in pastoral-dominated(North)and agriculture-dominated(South)regions,respectively.Results revealed the conversion between forest and grassland oriented the LULC transformation in the North.In contrast,human-activitiy-oriented land tended to occupy environmentally sensitive places in the South.Similar ES variations were supplied with the North outperforming the South when soil conservation was omitted.As for the impacts of regional ES variations,the natural and LULC policies both showed positive effects,whereas the anthropogenic factors showed positive in the North,which was negative in the South.Therefore,the ecologicallymaintained-dominant and ecologically-restored-dominant strategies should be separately adopted in the North and South.Our study provided appropriate regional ecological management suggestions for balancing the LULC-driven conflicts between ecological protection and regional development. 展开更多
关键词 Distinct land use/land cover(LULC)patterns Spatialtemporal evolution of ecosystem services(ESs) Agro-pastoral ecotone of northern China InVEST models Structural equation modeling(SEM)
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