不动产大数据在城市更新潜力空间评估中的应用     

汪洋  唐华  潘进  李洋  褚峤  刘雨晴 《测绘通报》2020,(12):71

我国在发展新常态与城市精细化治理背景下,对城市更新精准施策与量化评估提出了更高的要求。城市更新过程与人、地、房的相互作用紧密相关。不动产登记数据包含丰富的人、地、房空间属性信息,能够在城市的建成环境评估过程中发挥重要作用,现有城市更新评估模型几乎均未使用这一数据支持。本文从大数据量化评估视角出发,在文献研究的基础上,利用不动产登记大数据构建城市更新潜力评估体系,建立评估方法,并以南京市为应用案例,在街道（乡、镇）尺度上,对评估对象区域进行城市更新潜力的量化评估,实现精细化尺度的空间分析,辅助城市更新方向与选址,引导精准施策。  相似文献   

强降水天气过程“三个叫应”业务系统的研究与实现          下载免费PDF全文

彭显锋  王桥  陈贞宏  张红  白朝凤 《中低纬山地气象》2023,47(6):106-109

为提高气象服务的及时性和针对性,提高工作效率和质量,兴仁市气象局研发了强降水天气过程“三个叫应”业务系统。该系统基于省级气象大数据平台进行开发,实现了降水量监测、告警、图形化显示、自动显示叫应对象信息、自动生成服务材料、记录值班日记、生成工作总结等功能。系统操作简单,运行稳定可靠,大幅提升了业务自动化程度和气象服务能力。  相似文献   

Sea Level Rise in Miami Beach: Vulnerability and Real Estate Exposure     

Zella Ann Conyers  Richard Grant  Shouraseni Sen Roy 《The Professional geographer》2019,71(2):278-291

Sea level rise threatens coastal communities throughout the United States, and South Florida is on the front line. The iconic and built-up city of Miami Beach, Florida, has a well-developed, high-value property market, and the municipality has been lauded for proactively taking action to adapt to anticipated sea level rise. Moving beyond hyperbole and piecemeal evidence, we compile a comprehensive inventory of adaptation and mitigation measures implemented by various municipal agencies. We employ these data sets to measure exposure and readiness for the entire city and make a preliminary effort to develop a city vulnerability index. Our findings reveal that exposure throughout the city is high and that readiness is concentrated near stormwater drainage systems, leading to high vulnerability along the coast. When we compare the spatial patterns of the vulnerability index and the residential property values, we find a mismatch. The most vulnerable regions are characterized by high income, transiency, and an apparent unresponsiveness to sea level rise. No doubt our findings illustrate a lag effect, but if sea level rise increases, the real estate market could reach a tipping point unless state and federal agencies also fund more comprehensive adaptation.  相似文献   

中国耕地土壤相对湿度时空分异   总被引：4，自引：1，他引：3  

潘汉雄  朱国锋  张昱  郭慧文  雍磊磊  万巧卓  马惠莹  李森 《地理学报》2019,74(1):117-130

以全国653个农业气象站1993-2013年耕地的土壤相对湿度数据为基础,运用地统计方法,分析中国耕地土壤相对湿度时空分异特征与规律。结果表明:自1993年以来全国耕地的土壤相对湿度呈现波动上升趋势。全国耕地的土壤相对湿度普遍大于60%,分布区域自4月中旬开始随夏季风推移不断向北向西扩大,自10月下旬开始向东、南方向缩小。耕地土壤相对湿度值随土壤深度的增加而增加。年际尺度上,耕地的土壤相对湿度在夏秋季上升速度最快,变化幅度随土层深度增加而变小。土壤相对湿度与降水量存在较强的正相关关系,与潜在蒸发量、气温普遍存在较强的负相关关系。土壤相对湿度与各气象要素的相关性随深度加深而减弱。春、夏、秋季气象因素对旱地土壤相对湿度影响较大,冬季气象因素对水田影响更大。  相似文献   

产业集聚与城镇空间格局的耦合关系及时空演化——以长三角区域为例   总被引：3，自引：1，他引：2  

曹炳汝  孙巧 《地理研究》2019,38(12):3055-3070

产业集聚与城镇空间格局的变动之间存在着密切的联系。针对两者之间的耦合关系及时空演化问题,构建区域产业集聚与城镇空间格局演化综合评价指标,并利用1990—2016年长三角区域16个城市的统计数据,基于面板回归模型和空间重心模型探究两系统之间演化的互动作用关系和时空演化。结果表明：长三角区域的产业集聚与城镇空间格局间存在较显著的耦合关系;长三角区域各市区的耦合协调度及空间匹配度均稳步提升,但长三角区域耦合协调发展程度不够均衡,长三角南部的耦合协调的发展程度稍弱于长三角区域北部的发展;在近几十年的发展中,长三角北部地区逐渐形成以上海-南京为轴线的耦合协调发展区域,整个长三角区域的耦合协调则呈现“Z”字形特征。  相似文献   

Succession of the Nanoplankton Community during a Brown Tide in a Scallop Culture Area in China     

Qiao  Ling  Yu  Jie  Li  Ying  Guo  Haobing  Zhen  Yu  Zhang  Lingling  Mi  Tiezhu  Zhang  Fuchong  Bao  Zhenmin 《Ocean Science Journal》2019,54(3):375-392

Ocean Science Journal - Brown tides caused by Aureococcus anophagefferens have occurred frequently in the coastal waters of Qinhuangdao since 2009. The Changli coast is the area most strongly...  相似文献   

GIS支持下的土地资源环境承载力评价——以荣成市为例     

邵艳坡  刘森  郭志勇 《北京测绘》2019,33(1):35-39

随着人类生产活动的日益加剧,土地资源环境已逐渐成为制约社会经济发展的主要因素。基于荣成市土地资源环境要素,利用层次分析法构建了区域土地资源环境承载力评价体系。对土地资源进行基础性评价,在GIS技术支持下计算各项指标分值,并得出承载状态压力指数;在基础性评价结果的基础上,对水资源、生态条件与环境质量进行修正性评价。结果显示,荣成市土地资源环境基础性评价为可载,基于水资源系统的综合承载状态为临界,基于生态条件与环境质量系统的综合承载状态为可载。  相似文献   

Benthic foraminiferal fauna and sediment provenance of Eocene syn-rift sequences in Taiwan: implication for onset of Asian epi-continental marginal seas off China coast     

Huang  Chi-Yue  Shao  Lei  Wang  Ming-Huei  Xue  Wei-Guang  Qiao  Pei-Jun  Cui  Yu-Chi  Hou  Yuan-Li 《Marine Geophysical Researches》2019,40(2):111-127

Marine Geophysical Research - Early Cenozoic rift basins developed commonly on the Mesozoic basement along the SE Asia Continent. However, Eocene–Oligocene sequences were only exposed widely...  相似文献   

Improved Priority‐Flood method for depression filling by redundant calculation optimization in local micro‐relief areas     

Li‐Yang Xiong  Ru‐Qiao Jiang  Qing‐Hui Lu  Bi‐Sheng Yang  Fa‐Yuan Li  Guo‐An Tang 《Transactions in GIS》2019,23(2):259-274

Depression filling is a critical step in distributed hydrological modeling using digital elevation models (DEMs). The traditional Priority‐Flood (PF) approach is widely used due to its relatively high efficiency when dealing with a small‐sized DEM. However, it seems inadequate and inefficient when dealing with large high‐resolution DEMs. In this work, we examined the relationship between the PF algorithm calculation process and the topographical characteristics of depressions, and found significant redundant calculations in the local micro‐relief areas in the conventional PF algorithm. As such calculations require more time when dealing with large DEMs, we thus propose a new variant of the PF algorithm, wherein redundant points and calculations are recognized and eliminated based on the local micro‐relief water‐flow characteristics of the depression‐filling process. In addition, depressions and flatlands were optimally processed by a quick queue to improve the efficiency of the process. The proposed method was applied and validated in eight case areas using the Shuttle Radar Topography Mission digital elevation model (SRTM‐DEM) with 1 arc‐second resolution. These selected areas have different data sizes. A comparative analysis among the proposed method, the Wang and Liu‐based PF, the improved Barnes‐based PF, the improved Zhou‐based PF, and the Planchon and Darboux (P&D) algorithms was conducted to evaluate the accuracy and efficiency of the proposed algorithm. The results showed that the proposed algorithm is 43.2% (maximum) faster than Wang and Liu's variant of the PF method, with an average of 31.8%. In addition, the proposed algorithm achieved similar performance to the improved Zhou‐based PF algorithm, though our algorithm has the advantage of being simpler. The optimal strategies using the proposed algorithm can be employed in various landforms with high efficiency. The proposed method can also achieve good depression filling, even with large amounts of DEM data.  相似文献   

Ingestion of <Emphasis Type="Italic">Brachionus plicatilis</Emphasis> under different microalgae conditions     

周文礼  唐学玺  乔秀亭  王悠  王仁君  冯蕾 《中国海洋湖沼学报》2009,27(3):473-479

The effects of four microalgae,Chlorella vulgaris,Platymonas helgolandicavar,Isochrysis galbana,and Nitzschia closterium on the grazing and filtering rates of the marine rotifer,Brachionus plicatilis,were evaluated under laboratory conditions.The grazing rates in separate cultures of the four microalga were as follows:C.vulgaris > P.helgolandicavar > I.galbana > N.closterium.However,the filtering rates occurred in the following order:P.helgolandicavar > N.closterium > C.vulgaris > I.galbana.A mixed diets ex...  相似文献