Geographic information systems (GIS)

地理信息系统 (GIS)
  • 文章类型: Journal Article
    在全球架构中,工程,和建筑业,建筑信息建模(BIM)技术的使用已大大扩展。然而,鉴于道路基础设施的独特特点,BIM技术的应用仍在探索中。本文重点介绍了元辰高速公路,探索BIM技术在施工综合管理中的创新应用。该项目采用先进技术,包括BIM,地理信息系统(GIS),物联网(IoT),精确识别关键节点和突破。由详细的BIM模型和多层次支持,多元化的数字化管理平台,该项目有效解决了多个隧道的施工挑战,桥梁,和复杂的交流,利用BIM技术实现整个元辰高速公路的智能化施工创新。通过BIM模型指导施工,利用基于BIM+GIS的管理云平台系统,并使用VR安全简报,有效降低了项目管理中沟通协调的难度,缩短项目测量周期,提高现场工作效率,并确保全面的控制和安全管理。本文为国内外公路行业应用BIM技术进行全线施工管理提供了一个示范案例,为公路施工管理提供新的视角和策略。
    Within the global architecture, engineering, and construction industry, the use of Building Information Modeling (BIM) technology has significantly expanded. However, given the unique characteristics of road infrastructure, the application of BIM technology is still being explored. This article focuses on the Yuanchen Expressway, exploring innovative applications of BIM technology in comprehensive construction management. The project employs advanced technologies, including BIM, Geographic Information Systems (GIS), and the Internet of Things (IoT), to precisely identify critical nodes and breakthroughs. Supported by a detailed BIM model and a multi-level, diversified digital management platform, the project effectively addresses construction challenges in multiple tunnels, bridges, and complex interchanges, achieving intelligent construction innovation throughout the Yuanchen Expressway with BIM technology. By guiding construction through BIM models, utilizing a BIM+GIS-based management cloud platform system, and employing VR safety briefings, the project effectively reduces the difficulty of communication and coordination in project management, shortens the project measurement cycle, improves on-site work efficiency, and ensures comprehensive control and safety management. This article provides an exemplary case for the application of full-line construction management using BIM technology in the highway sector both in China and globally, offering new perspectives and strategies for highway construction management.
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  • 文章类型: Journal Article
    行人安全,特别是对于儿童,依赖于精心设计的途径。对儿童友好的道路在保护年轻行人方面发挥着至关重要的作用。容纳车辆和行人的共享空间可以为行人带来好处。然而,在这些小路附近玩耍的活跃儿童容易发生事故。这项研究旨在开发一种有效的方法来规划儿童友好的行人通道,考虑到社区发展和儿童的具体需求。采用了混合方法,利用广州的大唐社区,中国,作为一个案例研究。这种方法将绘图技术与GIS数据分析相结合。使用绘图方法来识别2-6岁儿童的兴趣点。定性和定量的模糊层次分析法评估影响路径规划的因素,分配适当的权重。加权叠加分析法构建了综合成本网格,考虑到各种社区元素。为了简化规划流程,根据确定的因素开发了一个GIS工具,导致一个实用的,儿童友好的行人通道网络。结果表明,这种方法有效地创造了儿童友好的途径,确保计划道路网络内的最佳连通性。
    Pedestrian safety, particularly for children, relies on well-designed pathways. Child-friendly pathways play a crucial role in safeguarding young pedestrians. Shared spaces accommodating both vehicles and walkers can bring benefits to pedestrians. However, active children playing near these pathways are prone to accidents. This research aims to develop an efficient method for planning child-friendly pedestrian pathways, taking into account community development and the specific needs of children. A mixed-methods approach was employed, utilizing the Datang community in Guangzhou, China, as a case study. This approach combined drawing techniques with GIS data analysis. Drawing methods were utilized to identify points of interest for children aged 2-6. The qualitative and quantitative fuzzy analytic hierarchy process assessed factors influencing pathway planning, assigning appropriate weights. The weighted superposition analysis method constructed a comprehensive cost grid, considering various community elements. To streamline the planning process, a GIS tool was developed based on the identified factors, resulting in a practical, child-friendly pedestrian pathway network. Results indicate that this method efficiently creates child-friendly pathways, ensuring optimal connectivity within the planned road network.
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  • 文章类型: Journal Article
    高速公路建设对发展中国家的生态环境造成了重大威胁,因此,发展中国家高速公路沿线生态恢复力的变化特征具有重要意义。这项实证研究的重点是柬埔寨金边-西哈努克高速公路2公里范围内的典型区域,并利用遥感和地理信息系统(GIS)技术分析了高速公路沿线生态恢复力的变化特征。研究结果表明,由于高速公路的建设,转入或移出土地利用类型的土地利用类型增加,此外,土地利用类型呈现出自然属性减少和人类属性增加的趋势。发现高速公路建设对土地利用类型重心的转移速率有观察到的影响,重心向高速公路建设方向转移。植被覆盖度较高的西部地区建设对生态恢复力的影响高于城市化程度较高的东部地区。研究建立了基于土地利用类型的高速公路沿线生态恢复力变化特征的理论评价模型,高速公路建设的可持续性,维护区域生态环境。
    Expressway construction has caused a significant threat to the ecological environment in developing countries, and therefore the variation characteristics of ecological resilience along the expressway in developing countries are of major importance. This empirical study focuses on a typical area within a 2-km range of the Phnom Penh-Sihanoukville Expressway in Cambodia and uses remote sensing and geographic information systems (GIS) technology to analyze the variation characteristics of ecological resilience along the expressway. The results of the study reveal that due to the construction of expressways, the land use types transferred into or out of the land use types increase and furthermore the land use types show a trend of decreasing natural attributes and increasing human attributes. It is found that expressway construction has an observed effect on the transfer rate of the center of gravity of land use type, and the direction of the center of gravity shifts in the direction of expressway construction. The impact of construction on the ecological resilience of the western region with higher vegetation coverage was higher than that of the eastern region with higher urbanization. The research develops a theoretical evaluation model based on land use type of the variation characteristics of ecological resilience along the expressway, which can be used to enable the sustainability of expressway construction and maintain the regional ecological environment.
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  • 文章类型: Journal Article
    人口增长和随之而来的生态空间占用给区域生态安全和社会稳定带来巨大风险。在中国,禁止城市化和工业建设的“生态保护红线”(ECR)已被提出作为解决空间不匹配和管理矛盾的国家政策。然而,不友好的人类干扰活动(例如,耕种,采矿,和基础设施建设)仍然存在于ECR内部,对生态稳定和安全构成了极大的威胁。在这篇文章中,提出了贝叶斯网络(BN)-GIS概率模型,以空间和定量地解决区域尺度上对ECR的人为干扰风险。贝叶斯模型整合了多种人类活动,ECR的生态受体,以及它们用于计算人为干扰风险的暴露关系。然后引入案例学习方法地理信息系统(GIS),基于变量的空间属性训练BN模型,以评估风险的空间分布和相关性。该方法已应用于2018年江苏省划定的ECR的人为干扰风险评估,中国。结果表明,大多数ECRs处于低或中人为干扰风险水平,而连云港市的一些饮用水水源地和森林公园风险最高。敏感性分析结果显示了ECR脆弱性,特别是对于农田,造成人为干扰的风险最大。这种空间概率方法不仅可以提高模型的预测精度,而且还帮助决策者确定如何确定政策设计和保护干预措施的优先事项。总的来说,它为以后的ECR调整以及区域范围内的人为干扰风险监督和管理奠定了基础。
    Population growth and associated ecological space occupation are posing great risks to regional ecological security and social stability. In China, \"Ecological Conservation Redline\" (ECR) that prohibited urbanization and industrial construction has been proposed as a national policy to resolve spatial mismatches and management contradictions. However, unfriendly human disturbance activities (e.g., cultivation, mining, and infrastructure construction) still exist within the ECR, posing a great threat to ecological stability and safety. In this article, a Bayesian network (BN)-GIS probabilistic model is proposed to spatially and quantitatively address the human disturbance risk to the ECR at the regional scale. The Bayesian models integrate multiple human activities, ecological receptors of the ECR, and their exposure relationships for calculating the human disturbance risk. The case learning method geographic information systems (GIS) is then introduced to train BN models based on the spatial attribute of variables to evaluate the spatial distribution and correlation of risks. This approach was applied to the human disturbance risk assessment for the ECR that was delineated in 2018 in Jiangsu Province, China. The results indicated that most of the ECRs were at a low or medium human disturbance risk level, while some drinking water sources and forest parks in Lianyungang City possessed the highest risk. The sensitivity analysis result showed the ECR vulnerability, especially for cropland, that contributed most to the human disturbance risk. This spatially probabilistic method can not only enhance model\'s prediction precision, but also help decision-makers to determine how to establish priorities for policy design and conservation interventions. Overall, it presents a foundation for later ECR adjustments as well as for human disturbance risk supervision and management at the regional scale.
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  • 文章类型: Journal Article
    医疗保健提供的公平性是公共卫生政策的长期关注问题。远程医疗被认为是通过扩大卫生服务获取范围并提高护理质量和健康结果来公平竞争的重要途径。这项研究完善了最近开发的“两步虚拟集水区(2SVCA)方法”,以评估巴吞鲁日大都会统计区初级保健的远程医疗可及性,路易斯安那州。将结果与基于流行的2步浮动集水区(2SFCA)方法通过对护理提供者的实际访问的空间可达性进行比较。研究表明,从城市到低密度,再到农村,空间和远程健康的可达性都在下降。此外,在空间可达性得分较高的地区,非洲裔美国人的百分比不成比例地较高;但是在远程医疗可达性中并未实现这种优势。在研究区,缺乏宽带主要是农村问题,导致农村地区的平均远程医疗可及性低于实际可及性。在另一边,缺乏宽带可负担性是整个城乡连续体的挑战,并且与贫困水平下的家庭和黑人等弱势群体的高度集中不成比例地相关。
    Equity in health care delivery is a longstanding concern of public health policy. Telehealth is considered an important way to level the playing field by broadening health services access and improving quality of care and health outcomes. This study refines the recently developed \"2-Step Virtual Catchment Area (2SVCA) method\" to assess the telehealth accessibility of primary care in the Baton Rouge Metropolitan Statistical Area, Louisiana. The result is compared to that of spatial accessibility via physical visits to care providers based on the popular 2-Step Floating Catchment Area (2SFCA) method. The study shows that both spatial and telehealth accessibilities decline from urban to low-density and then rural areas. Moreover, disproportionally higher percentages of African Americans are in areas with higher spatial accessibility scores; but such an advantage is not realized in telehealth accessibility. In the study area, absence of broadband availability is mainly a rural problem and leads to a lower average telehealth accessibility than physical accessibility in rural areas. On the other side, lack of broadband affordability is a challenge across the rural-urban continuum and is disproportionally associated with high concentrations of disadvantaged population groups such as households under the poverty level and Blacks.
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  • 文章类型: Journal Article
    医疗设施有助于确保更高的生活质量并改善社会福利。医疗设施的空间可达性决定了医疗设施配置的公平性和效率。它还提供有关居民可以共享的医疗服务的信息。虽然很关键,学者们往往忽视了医疗设施的水平,综合交通网络的组成,以及可达性文献中服务集水区的大小。本研究旨在通过考虑综合交通网络来填补这一研究空白,人口规模,医疗设施和住宅区之间的旅行阻抗,以及医疗设施水平对居民医疗选择的影响。构建了改进的潜力模型,分析了上海市长宁区医疗设施的空间可达性,中国。进行插值分析以揭示空间可达性模式。聚类分析采用聚类分析和离群值分析以及Getis-OrdGi*分析。结果表明,长宁区不同居住区的医疗设施空间可达性存在较大差异,上海。其中,虹桥街道医疗设施的空间可达性相对较高,新井镇,和新华路街道的一部分。此外,在研究地区,居民总体上更容易进入二级医院,而不是一级和三级医院。这项研究为城市规划者和决策者提供了一个空间决策支持系统,以改善医疗设施的可及性。它扩展了有关公共设施空间规划的文献,可以促进科学决策。
    Medical facilities help to ensure a higher quality of life and improve social welfare. The spatial accessibility determines the allocation fairness and efficiency of medical facilities. It also provides information about medical services that residents can share. Although critical, scholars often overlooked the level of medical facilities, the composition of integrated transportation networks, and the size of service catchment in the literature on accessibility. This study aims to fill this research gap by considering the integrated transportation network, population scale, travel impedance between medical facilities and residential areas, and the impact of medical facilities\' levels on residents\' medical choices. An improved potential model was constructed to analyze the spatial accessibility of medical facilities in Changning District of Shanghai, China. Interpolation analysis was conducted to reveal the spatial accessibility pattern. Cluster and outlier analysis and Getis-Ord Gi* analysis were applied for the cluster analysis. Results show that the spatial accessibility of medical facilities is quite different in different residential areas of Changning District, Shanghai. Among them, the spatial accessibility of medical facilities is relatively high in Hongqiao subdistrict, Xinjing Town, and part of Xinhua Road subdistrict. In addition, residents have overall better access to secondary hospitals than to primary and tertiary hospitals in the study area. This study provides a spatial decision support system for urban planners and policymakers regarding improving the accessibility of healthcare facilities. It extends the literature on spatial planning of public facilities and could facilitate scientific decision making.
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  • 文章类型: Journal Article
    As the population is aging rapidly, the irrationality of residential care facility (RCF) configuration has impacted the efficiency and quality of the aged care services so significantly that the optimization of RCF configuration is urgently required. A multi-objective spatial optimization model for the RCF configuration is developed by considering the demands of three stakeholders, including the government, the elderly, and the investor. A modified immune algorithm (MIA) is implemented to find the optimal solutions, and the geographic information system (GIS) is used to extract information on spatial relationships and visually display optimization results. Jing\'an District, part of Shanghai, China, is analyzed as a case study to demonstrate the advantages of this integrated approach. The configuration rationality of existing residential care facilities (RCFs) is analyzed, and a detailed recommendation for optimization is proposed. The results indicate that the number of existing RCFs is deficient; the locations of some RCFs are unreasonable, and there is a large gap between the service supply of existing RCFs and the demands of the elderly. To fully meet the care demands of the elderly, 6 new facilities containing 1193 beds are needed to be added. In comparison with the optimization results of other algorithms, MIA is superior in terms of the calculation accuracy and convergence rate. Based on the integration of MIA and GIS, the quantity, locations, and scale of RCFs can be optimized simultaneously, effectively, and comprehensively. The optimization scheme has improved the equity and efficiency of RCF configuration, increased the profits of investors, and reduced the travel costs of the elderly. The proposed method and optimization results have reference value for policy-making and planning of RCFs as well as other public service facilities.
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  • 文章类型: Journal Article
    To evaluate flood-prone areas, correlation analysis of flooding factors for the quantitative evaluation of hazard degree was determined to assist in further disaster prevention management. This study used flood-prone areas in 35 villages over eight townships (Changhua, Huatan, Yuanlin, Xiushui, Puyan, Hemei, Dacun, and Erlin) in Changhua County as research samples. Linear combination was used to evaluate flood-prone environmental indices, and an expert questionnaire was designed by using the analytic hierarchy process and the Delphi method to determine the weights of factors. These factors were then used to calculate the eigenvector of a pairwise comparison matrix to obtain the weights for the risk assessment criteria. Through collection of disaster cases, with particular focus on specifically protected areas where flooding has occurred or is likely to occur, public adaptation and response capabilities were evaluated by using an interview questionnaire that contains the items of perceived disaster risk, resource acquisition capability, adaptation capability, and environment understanding and disaster prevention education. Overlays in a geographic information system were used to analyze the flood-risk degree in villages and to construct a distribution map that contains flood-prone environment indices. The results can assist local governments in understanding the risk degree of various administrative areas to aid them in developing effective mitigation plans.
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