基于互联网公交调度管理系统的设计与实现     

李飞  孙轩  马春红 《测绘软科学研究》2014,(2):69-73

随着国民经济的发展和城市化进程的推进,城市交通问题日益凸显。在当今数字城市和智慧城市建设的浪潮下,通过互联网和现代IT技术实现城市公交系统的高效管理,提高公共交通的运营效率和社会服务水平,符合现代化大城市发展的必然要求。从设计与实现角度,本文对基于互联网的公交调度管理系统的组成与功能进行了详细介绍。  相似文献   

基于WebGIS的突发事件网络舆情可视化设计与实现     

李杰  赵阳 《测绘信息与工程》2014,(4):38-41

从地理学角度分析网络舆情,将网络舆情映射到地理空间,借助GIS地理可视化及空间分析技术来分析和挖掘网络舆情的时空特性。设计了基于RIA模式架构的分布式突发事件网络舆情WebGIS平台,实现了基于事件的网络舆情时空可视化、专题图制作、空间分析和预测预警等功能,为突发事件应急处置、知识发现提供决策支持。  相似文献   

“Natural cycles” in lay understandings of climate change     

Linda H. Connor  Nick Higginbotham 《Global Environmental Change》2013,23(6):1852-1861

This article analyses lay understandings of climate change elicited through a longitudinal population-based survey of climate change, place and community among 1162 residents in the Hunter Valley, Southeast Australia. We explore how older residents in contrasting rural and coastal geographic areas perceive climate change information in terms of culturally relevant meanings and values, lived experiences and emotional responses to seasonal cycles, temperature fluctuations and altered landscapes. Thematic analysis of comments given by 467 interviewees to an open-ended question identified a significant subset for whom the concepts of “nature” and “science” express competing views about changing climatic conditions. For them, the idea of “natural cycles” is a significant cultural construct that links nature and humans through time in a way that structures stable and resilient understandings of environmental change, drawing on established cosmological frameworks for contemplating the future in relation to the past. In contrast to other studies that postulate scepticism and denial as individuals’ fear management strategies in the face of climate change threat, we found that the natural cycles view is founded on a reassuring deeper conviction about how nature works, and is linked to other pro-environmental values not commonly found in sceptical groups. It is a paradox of natural cycles thinking that it rejects the anthropocentrism that is at the heart of science-based environmentalism. By contrast, it places humans as deeply integrated with nature, rather than operating outside it and attempting with uncertain science to control something that is ultimately uncontrollable.  相似文献   

COVID-19疫情防控中的中国公众舆情时空演变特征   总被引：1，自引：0，他引：1  

王卷乐  张敏  韩雪华  王晓洁  郑莉 《地理学报》2020,75(11):2490-2504

COVID-19疫情是全球面临的重大公共卫生危机。客观认识疫情期间的公众舆情响应和区域差异,对于提高重大公共卫生事件的政策调控和科学治理具有现实意义。本文以新浪微博为数据源,基于潜在狄利克雷分配主题模型和随机森林算法构建了主题抽取和分类模型,识别微博文本中的13个舆情话题,并从数量、空间、时间、内容等方面分析了2020年1月9日—3月10日在湖北省、京津冀、长三角、珠三角、成渝等城市群及沿边口岸等重点区域分布特点。结果表明：中国公众的响应总体是理性和积极的,但各舆情话题在区域内部的空间分布差异明显。各区域热点分布中,京津冀以首都北京为中心,长三角以上海为中心,辅以南京、杭州等热点,珠三角以广州、深圳为两核,湖北省以武汉为中心。建议应持续加强重点区域的疫情舆情关注和因地制宜的差异化精准响应。  相似文献   

Positioning fisheries in a changing world   总被引：1，自引：1，他引：0  

R. Quentin Grafton  Ray Hilborn  Lori Ridgeway  Dale Squires  Meryl Williams  Serge Garcia  Theodore Groves  James Joseph  Kieran Kelleher  Tom Kompas  Gary Libecap  Carl Gustaf Lundin  Mitsutaku Makino  Thorolfur Matthiasson  Richard McLoughlin  Ana Parma  Gustavo San Martin  Ben Satia  Carl-Christian Schmidt  Maree Tait  Lin Xiu Zhang 《Marine Policy》2008,32(4):630-634

Marine capture fisheries face major and complex challenges: habitat degradation, poor economic returns, social hardships from depleted stocks, illegal fishing, and climate change, among others. The key factors that prevent the transition to sustainable fisheries are information failures, transition costs, use and non-use conflicts and capacity constraints. Using the experiences of fisheries successes and failures it is argued only through better governance and institutional change that encompasses the public good of the oceans (biodiversity, ecosystem integrity, sustainability) and societal values (existence, aesthetic and amenity) will fisheries be made sustainable.  相似文献   

Environmental factors that affect sheep production in Brazil     

《Applied geography (Sevenoaks, England)》2013

Sheep were originally brought to Brazil approximately 500 years ago from Europe and Northern Africa; they adapted quickly to their new environments and developed unique traits. The objective of this study was to correlate environmental variables with sheep production in Brazil to promote the development of this activity. Brazil has several distinct environments as shown in this paper. These variables included vegetation cover (NDVI), precipitation, temperature, altitude, relative humidity (RH), solar radiation and the temperature humidity index (THI). Correlation analyses were performed with environmental variables and production levels at national and regional level. A factor analysis was performed to characterize the covariance between variables. We formed groups (clusters) due to productivity levels and performed canonical discriminant analyses to determine which variables were associated with different levels of production. The municipalities with the highest levels of sheep production were selected to define the intervals of each environmental variable. A map was drafted in ArcGis 9.3 to illustrate the landscape features where the highest levels of production are located. The results showed that, nationally, production is influenced by a great diversity of environments, thus masking possible correlations. When the correlation analysis was carried out by region, significant correlations were observed. Cluster analysis identified two dominant, clearly separated producing regions (northeast and south). The canonical analysis indicated that the most important variables delineating the clusters were precipitation, THI, temperature and RH. The map showing the landscape features where the highest production levels are located indicated that the breeds in the northeast are reared on an area of approximately 900,000 km², while those from the south are reared on an area of approximately 1,100 million km². This study showed that it is important to consider the environmental characteristics of different regions of Brazil when proposing public policies related to sheep production.  相似文献   

华南“南钨北扩”、“东钨西扩”及其找矿方向探讨   总被引：12，自引：1，他引：11  

王登红  陈郑辉  黄国成  武国忠  陈芳 《大地构造与成矿学》2012,36(3):322-329

钨是我国的优势矿产资源,但十年前被列入紧缺资源。华南是我国钨矿的集中产地,尤其是南岭的石英脉型黑钨矿闻名于世,赣南也被称为世界百年"钨都"。但是,近5年来皖南东源、赣北大湖塘、滇东南等大型钨矿的相继发现和成功勘探,新探明的资源储量可望占到总资源储量的1/4以上。这样,南钨北扩、东钨西扩将成为目前和今后钨矿勘查和钨工业布局的新方向。加强江西北部大湖塘、香炉山,浙江西部千亩田、夏色岭,安徽南部东源、东至岩、百丈岩,湖南东部邓埠仙、砖头坳、高坳背,广东北部和尚田,广东西部大绀山,广西东北部水岩坝、大明山及云南东南部南秧田一带钨矿的成矿规律研究,期望能够取得找矿新进展。  相似文献   

Enrolling a goddess for Delhi’s street vendors: The micro-politics of policy implementation shaping urban (in)formality     

《Geoforum》2017

In a world of persistent and growing informality of working and living conditions in cities, and increasing policy efforts to formalise the informal, why are some forms of informality criminalized while others enjoy sanction of the state? This paper argues that analysis of the politics of policy implementation of formalisation efforts can provide rich insights into urban formal-informal relations in cities of the global south, to complement policymaking or policy impact analyses. We present an in-depth case study analysis of the contested implementation of a unique policy effort to formalise street vendors in Delhi, India. A public authority lens reveals the micro-political practices employed by non-state and state actors in bureaucratic, judicial, political, market and other arenas aiming to control urban space. We argue that policy implementation outcomes are significantly shaped by ‘horizontal' contestations within society and within the state, to complement and intermesh with ‘vertical' state-society struggles. Moreover, contestants for public authority exploit official rules but also informal practices by the state, to engage and advance state fragmentation, enduringly shape cityscapes and to affect which forms of informality are condoned or condemned.  相似文献   

Public-space planning in four Nordic cities: Symbolic values in tension     

Merle Jacob  Tomas Hellström 《Geoforum》2010,41(4):657-665

This article takes its point of departure in the assumption that values shape planning practices and that alternatively one can reconstruct such values from the way planning interventions are argued and evaluated. We contend that planners’ discourses involve implicit value commitments that are observable in their representations of public space and implicated in the results of public-space planning. The paper builds an empirical case from representations of public space elaborated in planning documents developed by planners in four medium-sized Nordic cities. We show how these planning representations form four thematic value clusters concerning urban public space, namely leisure-play, identity-unity, power-organization and unruliness-change. Together these clusters constitute a value framework which reveals a number of central tensions relating to the way that planners seek to balance order and spontaneity in public space. The paper concludes by outlining and discussing these values and the tensions they represent.  相似文献   

Perspectives on Quaternary outreach and aspirations for the future     

David E. Anderson  Eleanor J. Brown 《Proceedings of the Geologists' Association. Geologists' Association》2010,121(4):455-467

Outreach arising from the study of the British Quaternary offers many benefits for society, especially because of its relevance for understanding contemporary environmental issues and environmental change. Outreach is also important for the long-term health of the academic discipline and research agenda. Through engaging with the formal education system, institutions, policy makers, planners and with the public at large, Quaternary specialists can do much to advance interest in and appreciation of the British landscape and its Quaternary record. This opinion and review article considers the importance and benefits of outreach in its many forms, makes the case for practitioners to continue and increase their involvement, offers examples of good practice, and sets out aspirations for the future.  相似文献