Results 1 to 10 of about 838 (142)
Water Resource Ecological Footprint and Suitable Carrying Population Size in Provincial Capitals of China [PDF]
, 2023 [Objective] The water resource carrying capacity and appropriate population size of main provincial capitals in China were analyzed in order to provide a reference for implementing the policy of “determining population by water resources” and the ...
Luo Shuang, Xu Youpeng, Zhang Xingqi
core +1 more source
Spatial-temporal Evolution Characteristics and Influencing Factors of Carbon Emissions in Yunnan Province Based on Land Use Changes [PDF]
, 2023 [Objective] The temporal and spatial variation of carbon emissions due to land use changes and the factors influencing carbon emissions in Yunnan Province were analyzed in order to provide a theoretical basis for optimizing land use structure and ...
Li Zhiying +4 more
core +1 more source
Shuitu Baochi Xuebao, 2023 为探究宁夏引黄灌区生态承载力和可持续发展情况,基于生态足迹法,通过生态服务价值当量对生态足迹模型中的通用均衡因子和产量因子进行本地化,定量评价引黄灌区2010—2019年不同土地利用生态承载力状况,并将生态承载力结果与通用因子计算结果进行对比分析,结果表明:(1)优化后均衡因子的 平均值为水域(11.735)＞林地(1.561)＞草地(0.901)＞耕地(0.785)＞建筑用地(0.073)＞未利用地(0.027),产量因子均值为耕地=建筑用地(1.701)＞水域(1.681)＞林地(1.680)＞草地(
郑佳乐 +4 more
doaj
生态承载力与生态系统生产总值耦合的生态系统服务评估—以福建省长汀县为例
Shuitu Baochi Xuebao, 2021 生态系统质量是区域探索生态优先、绿色发展为导向的高质量发展的重要基础。开展区域生态系统服务评估可获取国土空间生态本底特征，为生态系统保护格局构建提供现状底图，明确生态系统修复重点、国土空间优化提供导向。以长汀县为例，基于地区生态典型性、区域生物量差异及公众支付意愿与能力构建特色评价指标，采用生态承载力与生态系统生产总值耦合研究方法，对长汀县生态系统服务进行县域、镇域、村域及系统斑块等多尺度评估。结果表明：长汀县生态系统服务等级空间分布符合区划规律，大致呈中间低、四周高的特征；尺度细化使结果分布异质性更强，
陈华阳 +4 more
doaj
Spatiotemporal Evolution and Coupling Coordination of Socio-economic Level and Ecological Resilience in Fuzhou Metropolitan Area [PDF]
, 2023 [Objective] The coordinated state of socio-economic level (SEL) and ecological resilience (ER) in the Fuzhou metropolitan area (FMA) and its development trend were analyzed in order to provide regulatory suggestions and theoretical references for high ...
Chen Qiuxia +6 more
core +1 more source
Jianzhu Gangjiegou Jinzhan, 2022 为了研究初始几何缺陷对跨层平面桁架稳定承载力的影响，以某车站正立面跨层平面桁架为例，在1∶10的缩尺模型静力试验的基础上，结合有限元模型，考察了不同幅值的整体缺陷与构件缺陷对结构稳定承载力的影响。对比了一致缺陷模态法和静力失稳模态法这两种整体缺陷分布方法对结构稳定承载力的影响。研究表明：达到承载力极限前，桁架平面外位移量较少，未发生平面外失稳，在规范允许的偏差范围内，缺陷对结构的承载力影响几乎可以忽略；跨层平面桁架结构稳定承载力对初始几何缺陷的敏感性较弱，但其平面内及平面外位移对几何缺陷较敏感 ...
赵雷 +4 more
doaj
The Dynamic Analysis on Tourism Ecological Footprints in Liaoning Province [PDF]
, 2010 This article uses the concepts and calculation models of “Ecological Footprint” and “Tourism Ecological Pressure” to conduct quantitative analysis on the tourism ecological footprints, tourism ecological deficits, and the dynamic changes of tourism ...
FAN, Qiu-mei, SUN, Tie-heng
core +2 more sources
Shuitu Baochi Xuebao, 2005 利用生态足迹的理论与方法,对陕西关中渭河盆地,1986~2002年的生态足迹、生态承载力、生态盈余/亏损进行了测算。提出了生态压力指数的概念,建立了生态压力指数测算模型以及生态足迹、生态承载力、生态盈余及生态安全度变化预测模型,并对本地区万元GDP的生态足迹需求进行了测评。研究结果表明:①本地区生态承载力呈减少趋势;②生态足迹均呈现增加趋势;③1986~2002年生态压力指数从0.75增长为1.20,增长幅度为0.45,增长幅度较大;④关中盆地已严重超载,处于不安全状态 ...
任志远 黄青
doaj +2 more sources
Jianzhu Gangjiegou Jinzhan, 2023 为研究CFRP-铝合金复合管混凝土构件的轴压性能，进行了12根短柱试件的轴向压缩试验，主要参数为CFRP层数。试验结果表明：复合管混凝土试件出现多处外凸鼓曲、对应位置混凝土被压溃的破坏形态，而空复合管试件发生局部内凹屈曲破坏；试件轴压承载力随CFRP层数的增加而增大，且复合管混凝土试件的承载力提高幅度高于相应的空复合管试件。对各部分的承载力贡献进行分析，发现复合管混凝土试件中混凝土的承载力贡献超过70%，且承载力贡献随CFRP层数的增加而提高。提出了CFRP-铝合金复合管混凝土构件的轴压承载力计算公式。
王兰, 姜航, 谢文超, 叶勇
doaj
Coupling and Coordination Relationship Between New Urbanization, Economic Development, and Ecological Water Environment in Huaihe River Economic Belt, and Their Driving Factors [PDF]
, 2023 [Objective] The coupling coordination relationship and driving factors between new urbanization, economic development, and the ecological water environment in the Huaihe River economic belt were analyzed in order to provide a scientific reference for ...
Li Minghong, Lu Ci
core +1 more source