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相关概念视频

Design Example: Alignment of a Road Line Using GIS01:17

Design Example: Alignment of a Road Line Using GIS

48
The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
48
Manipulation and Analysis01:21

Manipulation and Analysis

23
GIS manipulation and analysis functions are vital for decision-making and planning. These activities range from data retrieval tasks, such as selecting information based on specific criteria, to advanced analytical techniques that address complex spatial problems.One critical GIS analysis method is overlaying, which combines multiple data layers to examine impacts. For example, overlaying a river-dammed lake boundary with road networks can identify affected infrastructure. Another common...
23
Levels of Use of a GIS01:29

Levels of Use of a GIS

49
Geographic Information Systems (GIS) operate across three levels of application, each representing an increasing degree of complexity: data management, analysis, and prediction. These levels reflect the expanding functionality and versatility of GIS technology in handling spatial data for diverse purposes.Data ManagementAt its foundational level, GIS serves as a tool for data management, enabling the input, storage, retrieval, and organization of spatial data. This level is often employed in...
49
Selected Data About Geographic Locations01:25

Selected Data About Geographic Locations

27
Geographic Information Systems (GIS) rely on two core types of data: spatial data and attribute data.Spatial DataSpatial data defines the physical location of features within a coordinate system, typically expressed in terms of latitude and longitude. It provides precise positioning for elements like roads, rivers, or buildings.Attribute DataAttribute data complements spatial data by adding descriptive information about these features. For example, a road's spatial data includes its start and...
27
Thematic Layering in GIS01:30

Thematic Layering in GIS

36
In the past, planning projects such as schools or public facilities required extensive manual effort to gather and compile data. Information such as property boundaries, soil characteristics, road networks, zoning regulations, and flood zones had to be sourced individually from courthouses, utility providers, and registry offices. Assembling these datasets into a coherent format often took several months, delaying project timelines.The introduction of Geographic Information Systems (GIS)...
36

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相关实验视频

Updated: Jun 28, 2025

Author Spotlight: Efficient Image Recognition Using Directional Gradient Histogram Technique and Support Vector Machines
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交通基础设施升级和绿色发展效率:用双重机器学习方法进行实证分析.

Shuai Ling1, Shurui Jin1, Haijie Wang2

  • 1College of Management and Economics, Tianjin University, Tianjin, 300072, China.

Journal of environmental management
|April 24, 2024
PubMed
概括

升级交通基础设施,包括高速铁路,将使中国的城市绿色发展效率提高4%. 这种改善是由服务业的增长和绿色创新推动的,区域政策对此有重大影响.

关键词:
双重机器学习可以实现.绿色发展是绿色发展.区域性影响 区域性影响合成差异差异的差异差异.升级交通基础设施的升级.

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科学领域:

  • 环境科学 环境科学
  • 城市规划 城市规划
  • 运输工程 运输工程

背景情况:

  • 越来越多的环境问题,如污染和气候变化,需要可持续的交通解决方案.
  • 中国将重点放在绿色和低碳交通转型上,这凸显了评估基础设施影响的必要性.
  • 传统的因果关系模型在分析复杂的运输基础设施效应方面存在局限性.

研究的目的:

  • 调查交通基础设施升级对中国城市绿色发展效率的影响.
  • 确定服务业聚集和绿色创新的调解作用.
  • 评估运输政策的区域影响,特别是高速铁路.

主要方法:

  • 双重机器学习模型应用于来自中国283个城市 (2003-2019) 的面板数据.
  • 综合差异模型用于区域高速铁路影响评估.
  • 古德曼-培根分解和强度测试用于验证.

主要成果:

  • 交通基础设施的升级将城市绿色发展效率提高4%.
  • 服务业聚集和绿色创新作为关键的调解道.
  • 运输政策的区域影响,如高速铁路,是相当大的,往往超过单个城市的影响.

结论:

  • 交通基础设施的升级对于提高城市绿色发展效率至关重要.
  • 政策干预应考虑区域动态和介导因素,如工业和创新.
  • 结果为城市和区域一级的可持续交通规划和政策提供了洞察力.