Based on Investigation and Assessment on Rational Exploitation and Utilization of Groundwater Resources in Typical Areas of the Hexi Corridor, the thesis studies on groundwater and environmental problems arising from ...Based on Investigation and Assessment on Rational Exploitation and Utilization of Groundwater Resources in Typical Areas of the Hexi Corridor, the thesis studies on groundwater and environmental problems arising from the large-scale agricultural development projects in Shule River Basin. The thesis analyzes problems in exploiting and utilizing water resources, defines the function zoning of groundwater resources in key areas and evaluates them. Finally, the thesis uses three-dimensional unsteady flow simulation and regional social and economic development plan to study on the allocation of groundwater in Shule River Basin. A proposal for rational allocation of Shule River Basin water resources has been put forward.展开更多
Functional zoning is a key step for the integrated planning and scientific management of a national park.Selecting the Three-River-Source National Park(TNP)as the study area,this paper establishes an evaluation system...Functional zoning is a key step for the integrated planning and scientific management of a national park.Selecting the Three-River-Source National Park(TNP)as the study area,this paper establishes an evaluation system including 13 evaluation indexes which are classified into four categories,namely:ecosystem services;potential distribution of key species habitats;ecological sensitivity;and ecological resilience through the comprehensive analysis on the regional eco-environmental features in the study area.The results of the comprehensive analysis,combined with the functions and requirements of management of national parks,indicate that TNP is divided into the first-level zone(the core conservation area,the ecological restoration area and the traditional utilization area)with definite targets of space management and the second-level zone with implementation of control measures.This method of functional zoning lays a solid foundation for the scientific planning of TNP;moreover,our study provides new insights into other national parks’functional zoning.展开更多
Objectives, principles, classification system, zoning method and procedure of river function region-alization were investigated systematically based on the present status of modern river regulation and function requir...Objectives, principles, classification system, zoning method and procedure of river function region-alization were investigated systematically based on the present status of modern river regulation and function requirement. Considering the ecosystem continuity and river function integrality, a river is suggested to be divided into five function zones: ecological protection zone, habitat restoration zone, exploitation and utilization zone, buffer zone,and transition zone, based on the developed intensity and the function characteristics of the river. In this paper, not only the five function zones were described qualitatively, but also the quantitative examination method on how to identify their function zone types was given. A double-criterion partitioning scheme was proposed according to the functional zoning diagram constructed by the evaluation of the social and ecological function of rivers. Finally, the procedures of river function regionalization were shown.展开更多
The middle and lower reaches of the Tarim River are currently one of the main regions of ecological restoration in the arid areas of western China.Using the principles and method of landscape ecology,this study has ch...The middle and lower reaches of the Tarim River are currently one of the main regions of ecological restoration in the arid areas of western China.Using the principles and method of landscape ecology,this study has chosen the fluvial corridor landscape in the middle and lower reaches of the Tarim River,and discusses the region’s ecologically functional regionalization system and issues related to its practical classification.On this basis the corresponding regionalizing principles and standards were developed which were used to qualitatively divide the three main landscapes as the ecologically functional areas in the drainage basin.The paper has also analyzed the characteristic of the study areas,and has put forward the measures for its ecological restoration.展开更多
Water function classification is to divide the waters in a basin or a region into different water function regions according to the natural features such as water resources condition, physical geographical location, e...Water function classification is to divide the waters in a basin or a region into different water function regions according to the natural features such as water resources condition, physical geographical location, environmental condition, etc. and social features such as the status quo of development and utilization, the requirement of social and economic development on water quantity and quality etc. Water function division has not ever been carried out in China and no ready-made theory and method can be complied with, in the meantime, it is a fundamental work with strong practical function. Therefore, the basic concept and theory foundation and research method are put forward on the base of summary of water resources management and developed and will be perfected in practice process of water function division. The Yangtze function zone covers the Yangtze river basin, the Lancang river basin and the rivers in the western area of the Lancang river in Southwest China. According to the technical outline of national water function division and combined with division practice of the Yangtze function zone, this paper presents the scope determination, procedure and method of water function division.展开更多
This research analyzes the culture-loaded words in English version of Tales of Hulan River bases on functional equivalence theory.The major point is what strategies Howard Goldblatt uses to achieve the equivalences in...This research analyzes the culture-loaded words in English version of Tales of Hulan River bases on functional equivalence theory.The major point is what strategies Howard Goldblatt uses to achieve the equivalences in semantic message,stylistic message,cultural message and response of readers,and the reasons why he uses them.This thesis contains four chapters,starting with the background,significances and the organization of the research.Chapter two introduces Tales of Hulan River as well as Xiao Hong and Howard Goldblatt,as well as the functional equivalence theory.To analyze the translation strategies of Goldblatt,chapter three divided the culture-loaded words into three categories,which is dialect,custom and proverb respectively,in this translation work of Tales of Hulan River from the perspective of functional equivalence theory.Last one is conclusion,summarizing the whole research.This paper highlights the translating of this novel into different languages and the spreading of Chinese culture.展开更多
Extensive spatiotemporal analyses of long-trend surface ozone in the Yangtze River Delta(YRD)region and itsmeteorology-related and emission-related have not been systematically analyzed.In this study,by using 8-year-l...Extensive spatiotemporal analyses of long-trend surface ozone in the Yangtze River Delta(YRD)region and itsmeteorology-related and emission-related have not been systematically analyzed.In this study,by using 8-year-long(2015–2022)surface ozone observation data,we attempted to reveal the variation ofmultiple timescale components using the Kolmogorov–Zurbenko filter,and the effects of meteorology and emissions were quantitatively isolated using multiple linear regression with meteorological variables.The results showed that the short-term,seasonal,and long-term components accounted for daily maximum 8-hr average O_(3)(O_(3–8)hr)concentration,46.4%,45.9%,and 1.0%,respectively.The meteorological impacts account for an average of 71.8%of O_(3–8)hr,and the YRD’s eastern and northern sections aremeteorology-sensitive areas.Based on statistical analysis technology with empirical orthogonal function,the contribution of meteorology,local emission,and transport in the long-term component of O_(3–8)hr were 0.21%,0.12%,and 0.6%,respectively.The spatiotemporal analysis indicated that a distinct decreasing spatial pattern could be observed from coastal cities towards the northwest,influenced by the monsoon and synoptic conditions.The central urban agglomeration north and south of the YRD was particularly susceptible to local pollution.Among the cities studied,Shanghai,Anqing,and Xuancheng,located at similar latitudes,were significantly impacted by atmospheric transmission—the contribution of Shanghai,the maximum accounting for 3.6%.展开更多
<div style="text-align:justify;"> <span style="font-family:Verdana;">Sensitivity analysis of neural networks to input variation is an important research area as it goes some way to addr...<div style="text-align:justify;"> <span style="font-family:Verdana;">Sensitivity analysis of neural networks to input variation is an important research area as it goes some way to addressing the criticisms of their black-box behaviour. Such analysis of RBFNs for hydrological modelling has previously been limited to exploring perturbations to both inputs and connecting weights. In this paper, the backward chaining rule that has been used for sensitivity analysis of MLPs, is applied to RBFNs and it is shown how such analysis can provide insight into physical relationships. A trigonometric example is first presented to show the effectiveness and accuracy of this approach for first order derivatives alongside a comparison of the results with an equivalent MLP. The paper presents a real-world application in the modelling of river stage shows the importance of such approaches helping to justify and select such models.</span> </div>展开更多
从生态系统服务的视角出发,探索耕地“生产-生活-生态”功能的时空演化规律及其权衡协同效应,对保障中国的耕地安全红线和粮食安全具有深远的现实意义。以长江经济带的耕地为研究对象,基于InVEST模型(Integrated Valuation of Ecosystem...从生态系统服务的视角出发,探索耕地“生产-生活-生态”功能的时空演化规律及其权衡协同效应,对保障中国的耕地安全红线和粮食安全具有深远的现实意义。以长江经济带的耕地为研究对象,基于InVEST模型(Integrated Valuation of Ecosystem Services and Tradeoffs)、权衡协同模型、熵权法等方法,对2000-2020年长江经济带耕地的“生产-生活-生态”功能进行量化,揭示了长江经济带耕地多功能的时空演变特征,在县域尺度下进一步分析耕地三生功能间的权衡协同效应,并识别耕地的功能分区,提出了差异化的优化路径。结果表明,1)2000-2020年间水田和旱地主要转移为林地和建设用地,转出面积分别为53248 km^(2)和51813 km^(2);其他地类向水田与旱地的转入面积分别为31486 km^(2)和43019 km^(2)。2)2000-2020年耕地的“生产-生活-生态”功能综合指数分别为0.47、0.52、0.45,呈先升后降的演变趋势;20.4%的县域耕地三生功能有所提升,45.5%的县域呈现不同程度的下降态势。3)耕地的“生产-生活-生态”功能间的权衡协同效应呈显著的空间异质性。4)将耕地划分为弹性发展区(58.7%)、生产保护区(23.3%)以及关键发展区(17.8%)三类,并提出差异化、精细化的耕地优化路径与管理策略。展开更多
基金the project Survey and Assessment of Water Resources Exploitation and Utilization in Characteristic Areas of the Hexi Corridor
文摘Based on Investigation and Assessment on Rational Exploitation and Utilization of Groundwater Resources in Typical Areas of the Hexi Corridor, the thesis studies on groundwater and environmental problems arising from the large-scale agricultural development projects in Shule River Basin. The thesis analyzes problems in exploiting and utilizing water resources, defines the function zoning of groundwater resources in key areas and evaluates them. Finally, the thesis uses three-dimensional unsteady flow simulation and regional social and economic development plan to study on the allocation of groundwater in Shule River Basin. A proposal for rational allocation of Shule River Basin water resources has been put forward.
基金National Key Research and Development Program of China,No.2017YFC0503806
文摘Functional zoning is a key step for the integrated planning and scientific management of a national park.Selecting the Three-River-Source National Park(TNP)as the study area,this paper establishes an evaluation system including 13 evaluation indexes which are classified into four categories,namely:ecosystem services;potential distribution of key species habitats;ecological sensitivity;and ecological resilience through the comprehensive analysis on the regional eco-environmental features in the study area.The results of the comprehensive analysis,combined with the functions and requirements of management of national parks,indicate that TNP is divided into the first-level zone(the core conservation area,the ecological restoration area and the traditional utilization area)with definite targets of space management and the second-level zone with implementation of control measures.This method of functional zoning lays a solid foundation for the scientific planning of TNP;moreover,our study provides new insights into other national parks’functional zoning.
基金Supported by the Natural Science Foundation of Liaoning Province (Grant No. 20052183)
文摘Objectives, principles, classification system, zoning method and procedure of river function region-alization were investigated systematically based on the present status of modern river regulation and function requirement. Considering the ecosystem continuity and river function integrality, a river is suggested to be divided into five function zones: ecological protection zone, habitat restoration zone, exploitation and utilization zone, buffer zone,and transition zone, based on the developed intensity and the function characteristics of the river. In this paper, not only the five function zones were described qualitatively, but also the quantitative examination method on how to identify their function zone types was given. A double-criterion partitioning scheme was proposed according to the functional zoning diagram constructed by the evaluation of the social and ecological function of rivers. Finally, the procedures of river function regionalization were shown.
基金supported by the National Natural Science Foundation of China (40271011)
文摘The middle and lower reaches of the Tarim River are currently one of the main regions of ecological restoration in the arid areas of western China.Using the principles and method of landscape ecology,this study has chosen the fluvial corridor landscape in the middle and lower reaches of the Tarim River,and discusses the region’s ecologically functional regionalization system and issues related to its practical classification.On this basis the corresponding regionalizing principles and standards were developed which were used to qualitatively divide the three main landscapes as the ecologically functional areas in the drainage basin.The paper has also analyzed the characteristic of the study areas,and has put forward the measures for its ecological restoration.
文摘Water function classification is to divide the waters in a basin or a region into different water function regions according to the natural features such as water resources condition, physical geographical location, environmental condition, etc. and social features such as the status quo of development and utilization, the requirement of social and economic development on water quantity and quality etc. Water function division has not ever been carried out in China and no ready-made theory and method can be complied with, in the meantime, it is a fundamental work with strong practical function. Therefore, the basic concept and theory foundation and research method are put forward on the base of summary of water resources management and developed and will be perfected in practice process of water function division. The Yangtze function zone covers the Yangtze river basin, the Lancang river basin and the rivers in the western area of the Lancang river in Southwest China. According to the technical outline of national water function division and combined with division practice of the Yangtze function zone, this paper presents the scope determination, procedure and method of water function division.
文摘This research analyzes the culture-loaded words in English version of Tales of Hulan River bases on functional equivalence theory.The major point is what strategies Howard Goldblatt uses to achieve the equivalences in semantic message,stylistic message,cultural message and response of readers,and the reasons why he uses them.This thesis contains four chapters,starting with the background,significances and the organization of the research.Chapter two introduces Tales of Hulan River as well as Xiao Hong and Howard Goldblatt,as well as the functional equivalence theory.To analyze the translation strategies of Goldblatt,chapter three divided the culture-loaded words into three categories,which is dialect,custom and proverb respectively,in this translation work of Tales of Hulan River from the perspective of functional equivalence theory.Last one is conclusion,summarizing the whole research.This paper highlights the translating of this novel into different languages and the spreading of Chinese culture.
基金supported by the National Natural Science Foundation of China(No.42075177)the National Key Research and Development Program of China(No.2017YFC0210003).
文摘Extensive spatiotemporal analyses of long-trend surface ozone in the Yangtze River Delta(YRD)region and itsmeteorology-related and emission-related have not been systematically analyzed.In this study,by using 8-year-long(2015–2022)surface ozone observation data,we attempted to reveal the variation ofmultiple timescale components using the Kolmogorov–Zurbenko filter,and the effects of meteorology and emissions were quantitatively isolated using multiple linear regression with meteorological variables.The results showed that the short-term,seasonal,and long-term components accounted for daily maximum 8-hr average O_(3)(O_(3–8)hr)concentration,46.4%,45.9%,and 1.0%,respectively.The meteorological impacts account for an average of 71.8%of O_(3–8)hr,and the YRD’s eastern and northern sections aremeteorology-sensitive areas.Based on statistical analysis technology with empirical orthogonal function,the contribution of meteorology,local emission,and transport in the long-term component of O_(3–8)hr were 0.21%,0.12%,and 0.6%,respectively.The spatiotemporal analysis indicated that a distinct decreasing spatial pattern could be observed from coastal cities towards the northwest,influenced by the monsoon and synoptic conditions.The central urban agglomeration north and south of the YRD was particularly susceptible to local pollution.Among the cities studied,Shanghai,Anqing,and Xuancheng,located at similar latitudes,were significantly impacted by atmospheric transmission—the contribution of Shanghai,the maximum accounting for 3.6%.
文摘<div style="text-align:justify;"> <span style="font-family:Verdana;">Sensitivity analysis of neural networks to input variation is an important research area as it goes some way to addressing the criticisms of their black-box behaviour. Such analysis of RBFNs for hydrological modelling has previously been limited to exploring perturbations to both inputs and connecting weights. In this paper, the backward chaining rule that has been used for sensitivity analysis of MLPs, is applied to RBFNs and it is shown how such analysis can provide insight into physical relationships. A trigonometric example is first presented to show the effectiveness and accuracy of this approach for first order derivatives alongside a comparison of the results with an equivalent MLP. The paper presents a real-world application in the modelling of river stage shows the importance of such approaches helping to justify and select such models.</span> </div>
