Based on the ETM remote sensing images of Guangzhou City in 2014, the spatial distribution results o f three environmental factors including vegetation coverage(NDVI), soil index(vegetation index of bare soil) and sl ...Based on the ETM remote sensing images of Guangzhou City in 2014, the spatial distribution results o f three environmental factors including vegetation coverage(NDVI), soil index(vegetation index of bare soil) and sl ope were obtained. By using comprehensive index method, the normalized environmental factors were weighted and superimposed, and the fi nal evaluation results of ecological environment in Guangzhou City were obtained. The results showed that overall situation of natural ecological environment in Guangzhou was not optimistic, that is, the area of land with bad, moderate, good and superior environment accounted for 59.70%, 35.79%, 4.50% and around 0.01% of total area of land in Guangzhou City respectively. Ecological environment was generally poor in the central urban districts in the south of Guangzhou City, while it was relatively better in the north and northeast. Attaching importance to the constr uction of greenbelts and greenways is an effective way to improve regional environmental quality and natural ecological e nvironment level.展开更多
The South China Sea(SCS),situated in southern China,at the junction of the Pacific Plate,the Eurasian Plate,and the Indian Ocean Plate,is a northeast-southwest trending semi-enclosed sea.It spans an area of approximat...The South China Sea(SCS),situated in southern China,at the junction of the Pacific Plate,the Eurasian Plate,and the Indian Ocean Plate,is a northeast-southwest trending semi-enclosed sea.It spans an area of approximately 3.5 million square kilometers and has an average water depth of about 1200 m,its deepest point reaching 5559 m.In 2021,a scientific expedition(called as U1 voyage)in the South China Sea was organized by the Innovation Research Team of Guangdong Special Key Program from March to April,this marks the first comprehensive scientific research voyage to the southern Uboundary corridor.Consisting of a total of 30 papers,this special issue is to share a portion of the research findings from this scientific expedition U1 voyage,covering six aspects:1)characteristics of the marine ecosystem in the SCS and its response to marine dynamic processes;2)multi-scale marine dynamic processes,sea-air interactions,and forecasting techniques in the SCS;3)geomorphology and geological structure;4)sedimentary processes and resource potential in the SCS;5)geostrategy,rights and interests maintenance and strategic countermeasures in the SCS;6)marine scientific instruments.By integrating the scientific research with the study of history,jurisprudence and international strategies,this issue presents new insights into the formation history and scope evolution of the SCS,and it also seeks to establish a new scientific framework based on the marine governance and development of the SCS.展开更多
为掌握矿山地质环境问题的影响程度,以调查区多年遥感图像为信息源,通过图像识别技术,解译矿山地物信息,提取量化评价数据;然后结合改进序关系法与拉开档次法,最终建立基于直觉模糊集(Intuitionistic Fuzzy Set,IFS)-理想解法(Technique...为掌握矿山地质环境问题的影响程度,以调查区多年遥感图像为信息源,通过图像识别技术,解译矿山地物信息,提取量化评价数据;然后结合改进序关系法与拉开档次法,最终建立基于直觉模糊集(Intuitionistic Fuzzy Set,IFS)-理想解法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)的矿山地质环境综合评价模型。最后以陕西省富平县曹村镇为实例,基于遥感信息提取数据的分析,并结合研究区矿山开发与自然地理情况,构建矿山地质环境评价指标体系,应用所提出的模型对研究区的矿山进行地质环境评价,得出以矿山为单元的评价等级分区。结果表明,所提出的方法能够客观地反映研究区矿山地质环境现状,能为政府进一步制定矿山地质环境保护与治理政策提供合理参考。展开更多
基金Sponsored by National Natural Science Foundation of China(41271060)
文摘Based on the ETM remote sensing images of Guangzhou City in 2014, the spatial distribution results o f three environmental factors including vegetation coverage(NDVI), soil index(vegetation index of bare soil) and sl ope were obtained. By using comprehensive index method, the normalized environmental factors were weighted and superimposed, and the fi nal evaluation results of ecological environment in Guangzhou City were obtained. The results showed that overall situation of natural ecological environment in Guangzhou was not optimistic, that is, the area of land with bad, moderate, good and superior environment accounted for 59.70%, 35.79%, 4.50% and around 0.01% of total area of land in Guangzhou City respectively. Ecological environment was generally poor in the central urban districts in the south of Guangzhou City, while it was relatively better in the north and northeast. Attaching importance to the constr uction of greenbelts and greenways is an effective way to improve regional environmental quality and natural ecological e nvironment level.
基金Supported by the Guangdong Special Key Team Program(No.2019BT02H594)the Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)(No.GML2021GD0810)the Major Project of National Social Science Foundation of China(No.21ZDA097)(Research on the Active Participation in the Reform of Global Economic Governance System)。
文摘The South China Sea(SCS),situated in southern China,at the junction of the Pacific Plate,the Eurasian Plate,and the Indian Ocean Plate,is a northeast-southwest trending semi-enclosed sea.It spans an area of approximately 3.5 million square kilometers and has an average water depth of about 1200 m,its deepest point reaching 5559 m.In 2021,a scientific expedition(called as U1 voyage)in the South China Sea was organized by the Innovation Research Team of Guangdong Special Key Program from March to April,this marks the first comprehensive scientific research voyage to the southern Uboundary corridor.Consisting of a total of 30 papers,this special issue is to share a portion of the research findings from this scientific expedition U1 voyage,covering six aspects:1)characteristics of the marine ecosystem in the SCS and its response to marine dynamic processes;2)multi-scale marine dynamic processes,sea-air interactions,and forecasting techniques in the SCS;3)geomorphology and geological structure;4)sedimentary processes and resource potential in the SCS;5)geostrategy,rights and interests maintenance and strategic countermeasures in the SCS;6)marine scientific instruments.By integrating the scientific research with the study of history,jurisprudence and international strategies,this issue presents new insights into the formation history and scope evolution of the SCS,and it also seeks to establish a new scientific framework based on the marine governance and development of the SCS.
文摘为掌握矿山地质环境问题的影响程度,以调查区多年遥感图像为信息源,通过图像识别技术,解译矿山地物信息,提取量化评价数据;然后结合改进序关系法与拉开档次法,最终建立基于直觉模糊集(Intuitionistic Fuzzy Set,IFS)-理想解法(Technique for Order Preference by Similarity to an Ideal Solution,TOPSIS)的矿山地质环境综合评价模型。最后以陕西省富平县曹村镇为实例,基于遥感信息提取数据的分析,并结合研究区矿山开发与自然地理情况,构建矿山地质环境评价指标体系,应用所提出的模型对研究区的矿山进行地质环境评价,得出以矿山为单元的评价等级分区。结果表明,所提出的方法能够客观地反映研究区矿山地质环境现状,能为政府进一步制定矿山地质环境保护与治理政策提供合理参考。
