北京市道路名称分类与方向统计分析     

黄萌  陶迎春  刘光 《北京测绘》2017,(2)

城市道路路名是一个城市文化、历史的直观反映,而道路方向与城市发展规划息息相关,是城市结构的体现。本文以ArcGIS、Matlab为技术手段,开展了对北京市的基于道路名称的道路分类及道路方向的统计分析。研究结果对北京市旧城保护、了解北京市路网发展及路网规划具有一定的参考价值,为展现道路路名、道路方向数据探寻了新思路和新方法。  相似文献   

“零”投入建立县级土地查询系统     

黄萌 《河南国土资源》2004,(7):40-40

实行土地登记公开查询具有十分重大的意义。一方面，土地登记资料只有实行公开查询，才能切实做到让社会了解土地权利的状况，才能真正把土地登记的公示作用落到实处；另一方面，实行土地登记公开查询，能够使市场主体方便地了解到真实的土地权利状况，促进土地市场向健康透明的方向发展。  相似文献   

重大事件发生前后的海运网络动态分析（英文）     

方志祥  余红楚  陆锋  冯明翔  黄萌 《地理学报(英文版)》2018,(7)

Investigating the influence of international events on global maritime networks is a challenging task that must comprehensively incorporate geographical, political, and maritime sciences. Understanding global maritime network dynamics is an initial and critical step in this investigation. This study proposes an automatic identification system(AIS)-based approach to understanding maritime network dynamics before and after international events. In this approach, a spatiotemporal modeling method is introduced to measure the similarity in shipping trends before and after international events. Then, a spatiotemporal analytic framework is proposed to understand the maritime network dynamics by grouping similar situation, and assessing possible indirect effects within a network. Finally, three case studies of international events, military conflict, lifted economic sanctions, and government elections, were used to investigate the observed network dynamics possibly affected by international events. The results indicate that container, tanker, and bulk shipping between India and its connected countries all declined more than 69% after military conflicts between India and Pakistan in August 2015. Tanker shipping between Iran and the United Arab Emirates increased 51% after economic sanctions on Iran were lifted. Container shipping between Sri Lanka and Singapore, Malaysia, and India increased more than 74% after the general election in Sri Lanka. These investigations demonstrate the feasibility of the proposed approach in assessing the possible effects of international events on maritime network dynamics.  相似文献   

极端天气气候事件变化对荒漠化、土地退化和粮食安全的影响   总被引：1，自引：0，他引：1  

黄萌田  周佰铨  翟盘茂 《气候变化研究进展》2020,16(1):17-27

土地是人类赖以生存的重要资源,在受气候变化影响的同时其状况变化也在气候系统中起着关键作用。IPCC最新发布的气候变化与土地特别报告（SRCCL）系统反映了关于荒漠化、土地退化、可持续土地管理、粮食安全和陆地生态系统碳通量方面的最新科学认知,并探讨了如何进行更加可持续性的土地利用和管理以应对与土地相关的气候变化问题。文中从极端事件变化及其影响的角度,结合SRCCL与其他相关文献,予以分析和总结。结果表明,在全球变暖的背景下,极端天气气候事件的变化已经并将继续影响荒漠化和土地退化进程并对粮食安全造成冲击;而土地对气候系统的反馈作用,又会加剧气候变化并提高极端事件发生的概率和严重程度。面对气候变化尤其是极端事件给土地带来的巨大压力,必须坚持可持续的土地管理,通过减少包括土地和粮食系统在内的所有行业的排放,才有可能实现到21世纪末将全球平均升温控制在相对工业化前水平2℃以内的目标,以减轻气候变化对土地和粮食系统的负面影响。  相似文献