移动定位大数据视角下的人群移动模式及城市空间结构研究进展   总被引：5，自引：3，他引：2  

杨喜平  方志祥 《地理科学进展》2018,37(7):880-889

了解城市人群移动行为和空间结构对城市规划、交通管理、应急响应等具有重要的意义。近年来,随着信息技术(ICT)的快速发展,采集大规模、长时间序列的人群移动定位大数据变得容易,为人群移动行为研究带来了新的机遇和挑战。本文首先介绍了目前用于城市人群移动行为和空间结构研究的主要数据源及其特征,并分别从人群移动行为、城市空间结构2个方面对近3年国内外相关研究进行归纳总结。目前的研究主要从移动定位大数据中挖掘人群移动模式,理解人群移动时空规律,进一步透视城市的空间结构特征;而对城市空间结构与人群移动行为影响的研究较少。未来可通过融合多源时空数据,综合研究人群移动行为与城市空间结构之间的相互作用,发展大规模群体移动行为时空分析理论和模型,进一步深入理解人群移动行为与城市空间结构的耦合关系。  相似文献   

Fine-grained prediction of urban population using mobile phone location data     

Jie Chen  Shih-Lung Shaw  Feng Lu  Mingxiao Li  Shifen Cheng 《International journal of geographical information science》2018,32(9):1770-1786

Fine-grained prediction of urban population is of great practical significance in many domains that require temporally and spatially detailed population information. However, fine-grained population modeling has been challenging because the urban population is highly dynamic and its mobility pattern is complex in space and time. In this study, we propose a method to predict the population at a large spatiotemporal scale in a city. This method models the temporal dependency of population by estimating the future inflow population with the current inflow pattern and models the spatial correlation of population using an artificial neural network. With a large dataset of mobile phone locations, the model’s prediction error is low and only increases gradually as the temporal prediction granularity increases, and this model is adaptive to sudden changes in population caused by special events.  相似文献   

Global Landscapes: Teaching Globalization through Responsive Mobile Map Design     

Robert Roth  Stephen Young  Chelsea Nestel  Carl Sack  Brian Davidson  Julia Janicki 《The Professional geographer》2018,70(3):395-411

This article reports on the design and evaluation of Global Madison, a mobile map designed to support teaching and learning about globalization using Madison, Wisconsin, as a situated classroom. Our experience of place increasingly is mediated by mobile devices, opening new opportunities and challenges for research, industry, and education. Despite this rising popularity, few guidelines exist for creating and using mobile maps. Following tenets of user-centered design studies, we conducted two mixed-method evaluations of Global Madison to improve the tool and generate design insights that are potentially transferable to similar mobile mapping contexts: 244 students participated in an online survey after completing the tour and eighteen students were observed in the field. The evaluations generated new design considerations for mobile maps supporting situated learning, include: focus on critical issues that might leave students stranded, append location-based services with traditional mapping, enforce cognitive association between map and landscape, supply a consistent feed of information for new learners, encourage collaborative learning in the landscape, and promote student safety above all else.  相似文献   

基于移动GIS的小型移动应急平台的设计和实现   总被引：2，自引：0，他引：2  

周隽  花向红  涂伟  李昭 《测绘工程》2008,17(2):39-42

随着城市的不断发展,城市公共安全问题日益突出,公共安全事件频发,提高公共应急反应的速度成为公共安全管理的一个重要方面。公共安全应急需要相应的各种技术作为支持,文中将移动GIS运用到公共安全应急中,设计并实现了小型的移动应急平台。该平台由移动应急终端和移动应急中心组成,集成了GIS、GPS、GPRS技术,可以为公共安全事件的现场处置提供有效的支持。  相似文献   

XL-5型机械动力头、液压控制长行程给进钻机的研制          下载免费PDF全文

胡仲杰  张利明 《探矿工程》2008,35(10):28-29,32

分析了机械动力头、液压控制长行程给进钻机研发的必要性,提出了新型机械动力头钻机需要解决的相关问题,介绍了XL-5型钻机的结构形式、参数、特点及生产试验情况。  相似文献   

旋挖钻机钻进泥岩及硬塑黄土地层打滑原因分析及处理          下载免费PDF全文

徐志超 《探矿工程》2008,35(12):57-59

旋挖钻机在钻进泥岩和硬塑黄土地层时会出现打滑现象难以进尺,分析了出现打滑现象的原因,总结了克服泥岩和硬塑黄土地层打滑现象的技术措施。  相似文献   

15000Nm钻机试验台测试系统设计与应用   总被引：1，自引：0，他引：1  

代粉蕾 《煤田地质与勘探》2008,36(4)

由于煤矿坑道钻机钻进能力的提高,原有的钻机试验台已不能满足测试转矩超过6 000 Nm钻机的需要,为此,新建了煤矿坑道钻机试验台。新系统包括硬件和软件2部分,其最大测试转矩达到15 000 Nm,最大给进力/起拔力达到300 kN;采用智能化仪器,减少了计算量,提高了工作效率;软件系统具有扩展性强、复用性高、可进行灵活控制的特点;系统具有断电保护功能。新测试台与原试验台的比对试验表明,2个试验台得出的结果一致。  相似文献   

Ingress in Geography: Portals to Academic Success?     

Michael Davis 《The Journal of geography》2017,116(2):89-97

Niantic Labs has developed an augmented virtual reality mobile app game called Ingress in which agents must seek out and control locations for their designated factions. The app uses the Google Maps interface along with GPS to enhance a geocaching-like experience with elements of other classical games such as capture-the-flag. This study aims to assess the effect Ingress can have on introductory to physical geography students. These goals include: whether the students can acquire greater geographical interest through Ingress, garner a sense of community, and whether students exhibit improved exam scores in the classroom.  相似文献   

Coupling mobile phone and social media data: a new approach to understanding urban functions and diurnal patterns   总被引：1，自引：0，他引：1  

Wei Tu  Jinzhou Cao  Shih-Lung Shaw  Meng Zhou  Zhensheng Wang 《International journal of geographical information science》2017,31(12):2331-2358

Understanding urban functions and their relationships with human activities has great implications for smart and sustainable urban development. In this study, we present a novel approach to uncovering urban functions by aggregating human activities inferred from mobile phone positioning and social media data. First, the homes and workplaces (of travelers) are estimated from mobile phone positioning data to annotate the activities conducted at these locations. The remaining activities (such as shopping, schooling, transportation, recreation and entertainment) are labeled using a hidden Markov model with social knowledge learned from social media check-in data over a lengthy period. By aggregating identified human activities, hourly urban functions are inferred, and the diurnal dynamics of those functions are revealed. An empirical analysis was conducted for the case of Shenzhen, China. The results indicate that the proposed approach can capture citywide dynamics of both human activities and urban functions. It also suggests that although many urban areas have been officially labeled with a single land-use type, they may provide different functions over time depending on the types and range of human activities. The study demonstrates that combining different data on human activities could yield an improved understanding of urban functions, which would benefit short-term urban decision-making and long-term urban policy making.  相似文献   

The Differentiation of Point Symbols using Selected Visual Variables in the Mobile Augmented Reality System     

Łukasz Halik  Beata Medyńska-Gulij 《The Cartographic journal》2017,54(2):147-156

On the basis of initial studies devoted to a better understanding of how the public user (a pedestrian in the city) perceives cartographic symbols in the mobile augmented reality system, we present an attempt to determine the threshold values of differentiation for three visual variables. The variables of size, transparency, and focus were implemented into image point symbols representing five types of objects. The set of symbols was designed in accordance with the rules of cartographic design taking into consideration an analysis of 19 professional tourist works. The symbols were presented on the screen of a mobile device in a system imitating the augmented reality system against four different backgrounds: white, a wall, and two typical urban landscapes. The results of an internet survey conducted using a tablet at four locations in Poznan (Poland) allowed us to determine the following: threshold differentiation values for the analysed variables, indication of the dependence on the type of background displayed on the mobile device in augmented reality, and the advantage of using a combination of visual variables.  相似文献