传感器技术与应用论文范文英文版

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这是一篇 PHD的论文，谈论有关无线传感网络的，你看下，是否符合你需要，如果类型都不一致，那就没必要翻译了。Mechanisms for energy conservation in wireless sensor networksSupervisor: Maurizio BonuccelliThesis commettee: Paolo Ferraggina, Piero MaestriniExternal referees: Stefano Basagni, Mani SrivastavaNational commettee: Bugliesi, Meo, and Panzieri December 27, 2005 AbstractIn this thesis we address the problem of reducing energy consumption in wireless sensor We propose a suit of techniques andstrategies imported from other research areas that can be applied to design energy-efficient protocols in sensor They includetime series forecasting, quorums systems, and the interaction between sensor properties and protocol We apply these techniques to the time synchronization problem, to efficiently collecting data from a sensor network, and to ensuring stronger data consistency guarantees in mobile We show in [1,2,3,4] that time series forecasting techniques, and in particular autoregressive (AR) models, can be applied to sensor networks to conserve We study a simple type of time series models with a short prediction We have chosen this model because it is capableof predicting data produced by real-world sensors measuring physical phenomena, and it is computationally tractable on modern-generation sensor We apply these models to solve two relevant problems in sensor networks: the problem of efficiently collecting sensor data at the sink, and the time synchronization We propose an energy-efficient framework, called SAF Similarity--based Adaptable query Framework [1,2] ), for approximate querying and detecting outlier values in sensor The idea is to combine local AR models built at each node into a global model stored at the root of the network(the sink) that is used to approximately answer user Our approach uses dramatically fewer transmissions than previous approximate approaches by using AR models and organizing the network into clusters based on data similarity between Our definition of data similarity is based on the coefficients of the local AR models stored at the sink, which reduces energy consumption over techniques that directly compare data values, and allows us to derive an efficient clustering algorithm that is provably optimal in the number of clusters formed by the Our clusters have several interesting features that make them suitable also for mobile networks: first, they can capture similarity between nodes that are not geographically adjacent; second, cluster membership adapts at no additional cost; third, nodes within a cluster are not required to track the membership of other nodes in the Furthermore, SAF provides provably correct error bounds and allows the user to dynamically tune answer quality to answer queries in an energy and resource efficient In addition, we apply the AR models to solve the time synchronization problem from a novel perspective which is complementary to the well-studied clock synchronization problem [3,4] More precisely, we analyze the case in which a sensor node decides to skip one or more clock adjustments to save energy, or it is temporarily isolated, but still requires an accurate estimate of the We propose a provably correct clock method based on AR models, which returns a time estimate within a constant (tunable) error bound and error This method is highly adaptable and allows the sensor to decide how manyclock adjustments it can skip while maintaining the same time accuracy, thus saving In addition, we propose a suit of deterministic methods that reduce the time estimation error by at least a factor More precisely, we propose a provably correct deterministic clock reading method, called the DCR method, which exploits information regarding the sign of the clock deviation, and can be applied to reduce by half the frequency of the periodic clock adjustments, while maintaining the same error bound [3,4] This method is of both practical and theoretical In fact, it leads to a noticeable energy saving, and shows that a stronger but realistic clock model can lead to a refinement of the optimality bound for the maximum deviation of a clock that is periodically In addition, we propose a generalized version of the DCR method that enhances its accuracy depending on the clock stability, and a method that guarantees the monotonicity of the time values We analyze for the first time quorum system techniques in the context of sensor networks: we redesign them and show their benefits in terms of energy consumption [6] Quorum systems have the potential to save energy in sensor networks since they can reduce noticeably the amount of communication, improve the load balance among sensor nodes, and enhance the scalability of the However, previous quorum systems and quorum metrics, proposed for wired networks, are unsuitable for sensor networks since they do not address their properties and These observations have motivated us to redesigning quorum systems and their metrics, taking into account the limitations and characteristics of sensors (, transmission costs, limited energysource, physical radio broadcast), and the network More precisely, we redefine the following quorum metrics: load balance, access cost and quorum capacity, and devise some strategies based on some characteristics of sensor networks that reduce the amount of communication when designing quorum systems for sensor We apply these strategies to design a family of energy-efficient quorum systems with high In particular, we propose a quorum construction that reduces the quorum access cost, and propose an energy-efficient data diffusion protocol built on top of it that reduces the energy consumption by reducing the amount of transmissions and In addition, we analyze quorum systems in case of high node More precisely, we study the difficult problem of guaranteeing the intersection between two quorums in case nodes move continuously along unknown paths [7] We address this problem by defining a novel mobility model that provides a minimum set of constraints sufficient to derive strong data guarantees in highly mobile Also in this case, we show the unsuitability of previous quorum systems, and provide a condition which is necessary to guarantee data availability and atomic consistency under high node We propose a new classof quorum systems, called Mobile Dissemination (MD) quorums, suitable for highly mobile networks, and propose a quorum construction which is optimal with respect to the quorum size (, message transmissions) [7] Then, we apply the MD quorum system to implement a provably correct atomic read/write shared memory for mobile and sparse Bibliography [1] D Tulone, S M PAQ: Time series forecasting for approximate query answeringin sensor In P of the 3rd European Workshop on Wireless Sensor Networks, 21-37, Feb [2] D Tulone, S M An energy-efficient querying framework in sensor networks for detecting node Submitted to [3] D T On the feasibility of global time estimation under isolation conditions in wireless sensor To appear in A[4] D T A resource-efficient time estimation for wireless sensor In P of the 4th Workshop of Principles of Mobile Computing, 52-59, Oct [5] D T How efficiently and accurately can a process get the reference time? I S on Distributed Computing, O Brief announcement, 25-[6] DTulone, E D D Redesigning quorum systems for wireless sensor Submitted to [7] D T Is it possible to ensure strong data guarantees in highly mobile networks? Submitted to

161 评论 1小时前发布

猪妈妈1964

《传感技术学报》创刊于1988年，她是由教育部主管、中国教育部全国高校传感器技术研究会委托东南大学主办发行的大16K学术性季刊，她是我国在介绍传感器理论和应用领域方面较为全面的惟一的学术性核心刊物《传感技术学报》按栏目分为：力学敏感器件、光学敏感器件、光纤敏感器件、生物、化学敏感器件、温度敏感器件、声学敏感器件、电磁学敏感器件、气体敏感器件、湿度敏感器件、机器人敏感器件、多种传感器技术处理的方法和理论、工艺技术、纳米材料及电子技术在传感器方面的应用等，同时也刊登具有国内外先进水平的最新研究成果。来稿要求和注意事项：一、来稿要求主题突出，论据充分、内容充实、新颖、创新、实用、言简意赅，字数6000字左右。二、标稿格式：①文标题（中、英文对照）；②作者姓名（中文、汉语拼音对照）；③作者单位（中、英文对照）；④摘要（中文150-300字、英文100-150字），摘要需能反映文章主要内容，应能给读者关于文章内容的足够信息，它包括研究的目的、方法、结果、结论。而论文的标题、背景信息、作者过去的研究及将来的计划和相同的信息都不应在摘要中出现；⑤关键词（中、英文对照5个左右）；⑥正文；⑦参考文献（限公开发表的文献）按文中引用次序排列（引用处应加角码（[ ]），顺序为：[杂志]：作者、刊名、年、卷（期）、页码（起止）。[书籍]：作者、书名、卷、版次、出版者、年、页码[起止]。专利为国别、专利号三、文稿中使用的名词术语、符号、计量单位要前后一致，符合国家有关标准（SI单位）。四、文稿应打印清楚，文字、图表均应清晰可辨。文中专业符号、外文字母、大小写、英文与希腊文和正、斜体都要标写清楚，用作上下角的字母、数码和符号，其高低层次分明，章节清楚，四级标题标清楚，插图用激光打印（图中的文字和正文一致）。五、图表应有自明性，且随文出现，以用Visio,AutoCAD,Origin,Matlab,Mathematica或Excel（等软件绘制生成）并直接剪贴到Word文件中的矢量图为佳，图中的文字须标明清楚，表格采用三线表。六、来稿不得涉及国家机密，涉及者应有单位证明。来稿一式两份，请自留底稿，文稿不论录用与否一律不退稿，来稿必须写明详细地址（邮政编码）及联系人和电话号码，有电子邮件信箱的也请留下信箱地址。文稿中须有作者简介（姓名、性别、出生年月、职称或职务、学历、现从事何种研究），来稿切勿一稿两投。同时按照我部的电子邮箱地址邮寄电子文档。七、来稿者的作者顺序排列，我们一律按原稿排列。需要更改者，一律要和其他作者协商，并有文字证明，否则不予变更。来稿请寄：南京市四牌楼2号东南大学《传感技术学报》编辑部，邮政编码：210096

126 评论 3小时前发布

小狮子女王

室内空气质量检测与传感器的应用　　 [摘要]室内空气品质对人的影响至关重要,利用传感器检测空气质量是当今流行的一种方法,本文介绍了传感器在空气质量检测方面的原理应用,分析了当前气体传感器的优点和不足,以及气体传感器的发展趋势和前景。　　[关键词]空气质量气体传感器室内环境污染　　　　一、空气对于人的重要性　　人们每时每刻都离不开氧,并通过吸入空气而获得氧。一个成年人每天需要吸入空气达6500升以获得足够的氧气,因此,被污染了的空气对人体健康有直接的影响。人的一生中有90%以上时间在室内度过,可见,室内空气品质对人的影响更是至关重要。　　二、室内环境污染背景　　当今,人类正面临“煤烟污染”、“光化学烟雾污染”之后,又出现了“室内空气污染”为主的第三次环境污染。美国专家检测发现,在室内空气中存在500多种挥发性有机物,其中致癌物质就有 20多种,致病病毒 200多种。危害较大的主要有:氡、甲醛、苯、氨以及酯、三氯乙烯等。大量触目惊心的事实证实,室内空气污染已成为危害人类健康的“隐形杀手”,也成为全世界各国共同关注的问题。据统计,全球近一半的人处于室内空气污染中,室内环境污染已经引起7%的呼吸道疾病,22%的慢性肺病和15%的气管炎、支气管炎和肺癌。　　三、关于开展室内空气质量服务的几点设想　　着手调查国内家庭和办公室内空气质量的基本情况。　　了解并着手引进室内空气质量检测设备。　　进行规模较大的宣传活动,首先应由气象主管部门与环保主管部门联合建立室内空气质量问题的管理机制。　　对国际环保部门有关室内空气质量的法规、技术标准、室内污染测定方法及对测定仪器等问题进行专门的调查和研究。　　四、空气检测仪的强力武器——传感器　　检测技术是人们认识和改造世界的一种必不可少的重要技术手段。而传感器是科学实验和工业生产等活动中对信息资源的开发获取、传输与处理的一种重要工具。下面将介绍六种在空气质量检测方面发挥重要作用的传感器。　　金属氧化物半导体式传感器。金属氧化物半导体式传感器利用被测气体的吸附作用,改变半导体的电导率,通过电流变化的比较,激发报警电路。由于半导体式传感器测量时受环境影响较大,输出线形不稳定。金属氧化物半导体式传感器,因其反应十分灵敏,故目前广泛使用的领域为测量气体的微漏现象。　　催化燃烧式传感器。催化燃烧式传感器原理是目前最广泛使用的检测可燃气体的原理之一,具有输出信号线形好、指数可靠、价格便宜、无与其他非可燃气体的交叉干扰等特点。催化燃烧式传感器采用惠斯通电桥原理,感应电阻与环境中的可燃气体发生无焰燃烧,是温度使感应电阻的阻值发生变化,打破电桥平衡,使之输出稳定的电流信号,再经过后期电路的放大、稳定和处理最终显示可靠的数值。　　定电位电解式传感器。定电位电解式传感器是目前测毒类现场最广泛使用的一种技术,在此方面国外技术领先,因此此类传感器大都依赖进口。定电位电解式气体传感器的结构:在一个塑料制成的筒状池体内,安装工作电极、对电极和参比电极,在电极之间充满电解液,由多孔四氟乙烯做成的隔膜,在顶部封装。前置放大器与传感器电极的连接,在电极之间施加了一定的电位,使传感器处于工作状态。气体与的电解质内的工作电极发生氧化或还原反应,在对电极发生还原或氧化反应,电极的平衡电位发生变化,变化值与气体浓度成正比。　　迦伐尼电池式氧气传感器。迦伐尼电池式氧气传感器的结构:在塑料容器的一面装有对氧气透过性良好的、厚10-30μm的聚四氟乙烯透气膜,在其容器内侧紧粘着贵金属(铂、黄金、银等)阴电极,在容器的另一面内侧或容器的空余部分形成阳极(用铅、镉等离子化倾向大的金属)。用氢氧化钾。氧气在通过电解质时在阴阳极发生氧化还原反应,使阳极金属离子化,释放出电子,电流的大小与氧气的多少成正比,由于整个反应中阳极金属有消耗,所以传感器需要定期更换。目前国内技术已日趋成熟,完全可以国产化此类传感器　红外式传感器。红外式传感器利用各种元素对某个特定波长的吸收原理,具有抗中毒性好,反应灵敏,对大多数碳氢化合物都有反应。但结构复杂,成本高。　　PID光离子化气体传感器。PID由紫外灯光源和离子室等主要部分构成,在离子室有正负电极,形成电场,待测气体在紫外灯的照射下,离子化,生成正负离子,在电极间形成电流,经放大输出信号。PID具有灵敏度高,无中毒问题,安全可靠等优点。　　五、气体检测仪器仪表产业发展现状深度分析　　近年来,随着中国经济的高速发展,仪器仪表产业也得到了快速发展,自2004年产销首次突破千亿元大关,行业发展进入了快车道,2006年行业总产值突破两千亿元;2007年仪器仪表行业总产值达3078亿元,增长率高达5%;据仪器仪表行业协会统计,08年上半年仪器仪表行业总产值实现 9亿元,同比增长8%,其中分析仪器、环境监测仪器仪表增长率高达32%。　　科学技术的进步为气体检测仪器仪表行业的发展提供了条件,市场和政府政策的推动、人们安全意识的提高、相关法规法律的完善是气体检测行业发展的核心动力,这些推动使气体检测仪器仪表行业处于产业高速增长期。　　从技术发展的角度看,根据使用传感器原理的不同,常见的气体检测仪器仪表各自有适用气体及应用领域,新技术新产品正在成为未来气体检测仪器仪表的主流。　　六、对未来空气质量检测的展望　　随着人们生活水平的不断提高和对环保的日益重视,对各种有毒、有害气体的探测,对大气污染、工业废气的监测以及对食品和居住环境质量的检测都对气体传感器提出了更高的要求。纳米、薄膜技术等新材料研制技术的成功应用为气体传感器集成化和智能化提供了很好的前提条件。气体传感器将在充分利用微机械与微电子技术、计算机技术、信号处理技术、传感技术、故障诊断技术、智能技术等多学科综合技术的基础上得到发展。研制能够同时监测多种气体的全自动数字式的智能气体传感器将是该领域的重要研究方向。　　　　参考文献: 　　[1]陈艾敏感材料与传感器[M]北京:高等教育出版社　　[2]高晓蓉传感器技术[M]成都:西安交通大学出版社　　[3]彭军传感器与检测技术[M]北京:高等教育出版社　　[4]王元庆新型传感器原理及应用[M]北京:机械工业出版社　　[5]赵茂泰智能仪器原理及应用[M]北京:电子工业出版社

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杨杨d妈咪

百度百科有吧。。。只是建议你自个拿主意。。。

164 评论 5小时前发布

传感器技术与应用论文范文英文版

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