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The detection of city hotspots from geo-referenced urban data is a valuable knowledge support for planners, scientists, and policymakers. However, the application of classic density-based clustering algorithms on multi-density data can produce inaccurate results. Since metropolitan cities are heavily characterized by variable densities, multi-density clustering seems to be more appropriate to discover city hotspots. This paper presents CHD (City Hotspot Detector), a multi-density approach to discover urban hotspots in a city, by reporting an extensive comparative analysis with three classic density-based clustering algorithms, on both state-of-the-art and real-world datasets. The comparative experimental evaluation in an urban scenario shows that the proposed multi-density algorithm, enhanced by an additional rolling moving average technique, detects higher quality city hotspots than other classic density-based approaches proposed in literature. 相似文献
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《Expert systems with applications》2014,41(2):502-507
A relevant aspect when evaluating the city smartness is related to the innovative approach to urban traffic management. We present a system called city kernel, designed to handle several subsystems, each addressing a specific sensor network and we describe an infrastructure for wide traffic control via a vision sensor network. This infrastructure consists of a network of smart cameras operating over an outdoor public lighting thanks to power line communication technology and equipped with a vehicle counting and classification algorithm. We discuss the deployment of this network on the city kernel and some related services exposed to urban actors. 相似文献
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Cloud computing and Internet of Things (IoT) are two very different technologies that are both already part of our life. Their adoption and use are expected to be more and more pervasive, making them important components of the Future Internet. A novel paradigm where Cloud and IoT are merged together is foreseen as disruptive and as an enabler of a large number of application scenarios.In this paper, we focus our attention on the integration of Cloud and IoT, which is what we call the CloudIoT paradigm. Many works in literature have surveyed Cloud and IoT separately and, more precisely, their main properties, features, underlying technologies, and open issues. However, to the best of our knowledge, these works lack a detailed analysis of the new CloudIoT paradigm, which involves completely new applications, challenges, and research issues. To bridge this gap, in this paper we provide a literature survey on the integration of Cloud and IoT. Starting by analyzing the basics of both IoT and Cloud Computing, we discuss their complementarity, detailing what is currently driving to their integration. Thanks to the adoption of the CloudIoT paradigm a number of applications are gaining momentum: we provide an up-to-date picture of CloudIoT applications in literature, with a focus on their specific research challenges. These challenges are then analyzed in details to show where the main body of research is currently heading. We also discuss what is already available in terms of platforms–both proprietary and open source–and projects implementing the CloudIoT paradigm. Finally, we identify open issues and future directions in this field, which we expect to play a leading role in the landscape of the Future Internet. 相似文献
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泛在电力物联网是我国电力系统建设的重点方向之一,泛在电力物联网的底层通信是最底层的终端设备与网相连的第一个环节.针对泛在电力物联网的底层通信需求,在简要介绍了泛在电力物联网层次结构的基础上,阐述了网络底层通信应用的以太网、电力线载波、ZigBee、LoRa和NB-IoT共5种通信技术,最后指出了泛在电力物联网的底层通信技术的发展趋势,对相关机构进行相应的技术储备具有一定的价值。 相似文献
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Steadily increasing urbanization is causing significant economic and social transformations in urban areas, posing several challenges related to city management and services. In particular, in cities with higher crime rates, effectively providing for public safety is an increasingly complex undertaking. To handle this complexity, new technologies are enabling police departments to access growing volumes of crime-related data that can be analyzed to understand patterns and trends. These technologies have potentially to increase the efficient deployment of police resources within a given territory and ultimately support more effective crime prevention. This paper presents a predictive approach based on spatial analysis and auto-regressive models to automatically detect high-risk crime regions in urban areas and to reliably forecast crime trends in each region. The algorithm result is a spatio-temporal crime forecasting model, composed of a set of crime-dense regions with associated crime predictors, each one representing a predictive model for estimating the number of crimes likely to occur in its associated region. The experimental evaluation was performed on two real-world datasets collected in the cities of Chicago and New York City. This evaluation shows that the proposed approach achieves good accuracy in spatial and temporal crime forecasting over rolling time horizons. 相似文献
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曹莹莹 《计算机技术与发展》2015,(1)
以中小城市中生活配套设施较为完备的社区为研究对象,设计并实现了一个以物联网技术、Web应用开发技术、云计算技术为基础的智慧社区构建方案。其中智慧社区综合信息平台的设计与开发遵循Java EE标准,利用SOA构架的思想,实现分布式应用服务,并部署在公共云平台上,以降低运维成本,增加系统的安全性与可扩展性。应用结果表明,在普及智慧生活理念、改善人民生活质量的同时,该方案优化了资源使用,提高了社区管理效率,增加了社区经济效益。 相似文献
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健康智能家庭是指为那些本应该住院的人们——慢性病人、老年人和残疾人等——提供在自己家里独立、健康、安全、方便的日常生活。阐述了健康智能家庭的研究现状,给出了实验模型、系统模型和其中的家庭监护模块,重点介绍了传感器技术,并指出了所关注的技术领域的发展趋势。 相似文献
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嵌入式技术在智能家居控制系统中的应用 总被引：7，自引：0，他引：7
本文介绍了智能家居控制系统的国内外发展历史、现状,以及智能家居控制系统的基本设计思想;并对嵌入式技术在家居智能控制系统中的应用进行了探讨.采用嵌入式技术,可以将多元化的网络信息、多样化的自动化控制以及节能环保等功能,整合到一体化的家庭智能信息管理与自动化监控平台上,从而实现高效、舒适、安全、环保的居住环境. 相似文献
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张文海 《网络安全技术与应用》2014,(7):57-57
随着计算机与互联网技术的发展,互联网技术也从实验阶段走向了正式应用.应用互联网技术的智能家居安防系统也逐渐的开始走入普通人们的家庭中.但是目前的智能家居安防系统还不够成熟,还拥有很多的缺点,诸如：稳定性不高、价格昂贵、实用性差等等,在一定程度上限制了智能家居安防系统的发展.本文讨论了基于ZigBee技术的智能家居安防系统的设计.在一定程度上解决了目前安防系统稳定性不高,实用性差等问题. 相似文献
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智慧城市视野下档案工作问题研究中期刊文献多,档案学期刊作用突出;学科交叉率高,研究水平高;上升趋势温和,总体平稳;高产作者发表文献数量近半,高校研究成果明显,研究主题集中。研究问题包括：智慧城市建设中的档案工作、智慧档案、面向智慧城市的档案信息化、智慧城市背景下的档案信息资源开发与共建共享、融入智慧城市的档案服务、智慧城市与城建档案。 相似文献
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智能环境是一种典型的普适计算环境,集中体现了普适计算的诸多本质特征。如何实现随时随地的信息交互;面对资源变化,如何实现信息交互的平滑过渡,是实现和评价智能环境的关键。但是,由于在智能环境中,资源的异构性、动态性和移动性变得尤为突出,使得其实现颇具挑战性。在分析智能环境信息交互特点和模型需求的基础上,本文提出活动信息空间模型来解决智能环境对信息交互的不同要求。该模型通过对信息单元的抽象,提供三级的信息交互机制,面向信息表示、面向设备和面向使用者。并且,该模型具有在三级信息交互级别上进行平滑过渡的特点,充分适应了智能环境的要求。开发了一个原型系统并应用在老人健康保健中,验证了模型的有效性。 相似文献
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智能家居的发展方向与新技术 总被引：1，自引：0，他引：1
刘呱呱 《计算机光盘软件与应用》2012,(1):64-65
智能家居是人们对家居生活的一种理想。随着高新技术的不断发展,各技术领域智能程度的提高,智能家居也有了新的发展方向。本文首先给出了智能家居的发展方向,接着根据这些发展方向介绍了与此相关的信息技术、通信技术和无线射频技术等等,为智能家居的发展提供了有益的参考。 相似文献
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This special issue is based on the best papers from the 6th International Conference on Ambient Systems, Networks and Technologies (ANT), which was held at London, United Kingdom, on 2–5 June 2015. The conference attracted a large number of scientific papers that contributed to the state-of-the-art in the areas of pervasive and ambient information systems. This special issue follows on the same topics published earlier in the journals of Future Generation Computer Systems in 2013, 2014 and 2016 [1], [2], [3]. With rapid technological developments, we thought that it would be interesting once more to draw together high-quality work in this field. 相似文献
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面向智能电网的云计算技术研究 总被引：1，自引：0，他引：1
对面向智能电网的云计算技术进行了研究。首先,引入了云计算的基本概念,分析了它的关键特征。其次,将云计算和智能电网技术进行了融合,提出了智能云的概念。随后,深入研究了智能云的构建、资源管理和安全策略问题。最后,给出了结论和未来的研究工作。 相似文献
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随着我国的信息化事业的迅猛发展,以Internet技术为基础的计算机网络已成为人们生活中最重要的基础设施之一,与此同时,智能卡（通常称为IC卡）也已在国民经济各部门、各行业以及各地区获得了广泛应用。我国电信、社会保障、交通、建设及公用事业、卫生、组织机构代码管理等领域应用的智能卡数量已经超过了40亿张,智能卡的广泛应用在促进政府与行业管理模式和工作方法的转变,推动国家经济与社会的协调发展,方便百姓生活,提高人民的信息化意识方面发挥了关键作用,做出了重大贡献。从Internet技术和智能卡技术入手,将两者相结合,提出了一个基于网络的大型城市一卡通系统线上交易与网上银行交互的应用方案。 相似文献