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Dissertations / Theses on the topic 'WSANs'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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1

Zhou, Yuanye. "Mesh-based Dynamic Location Service In WSANs by a Team of Robots." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32465.

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A team of robots (also called actors) in Wireless Sensor and Actor Networks (WSANs) may not be able to optimally cover an area. Hence, after an event is reported by a sensor, all robots may not be quickly reachable for possible action in time. Furthermore, sensors may not be able to immediately deliver a report to a nearby robot. In this research work, we focus on a dynamic location service to deal with a sequence of multiple events in WSANs. We propose a novel dynamic mesh-based protocol (DMesh) to boost real-time performance of the location service. We investigate new strategies for efficien
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2

Doddapaneni, Krishna. "Energy aware performance evaluation of WSNs." Thesis, Middlesex University, 2014. http://eprints.mdx.ac.uk/17460/.

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Distributed sensor networks have been discussed for more than 30 years, but the vision of Wireless Sensor Networks (WSNs) has been brought into reality only by the rapid advancements in the areas of sensor design, information technologies, and wireless networks that have paved the way for the proliferation of WSNs. The unique characteristics of sensor networks introduce new challenges, amongst which prolonging the sensor lifetime is the most important. Energy-efficient solutions are required for each aspect of WSN design to deliver the potential advantages of the WSN phenomenon, hence in both
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Ali, Mahmood, and Kumar Ravula Sai. "Real-Time Support and Energy Efficiency In Wireless Sensor Networks." Thesis, Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-1150.

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<p>Wireless sensors nodes are made up of small electronic devices which are capable of sensing, computing and transmitting data from harsh physical environments like a surveillance field. These sensor nodes majorly depend on batteries for energy, which get depleted at a faster rate because of the computation and communication operations they have to perform. Communication protocols can be designed to make efficient utilization of energy resources of a sensor node and to obtain real time functionality. A set of previously reported routing and MAC (Medium Access Control) layer protocols has abil
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Kamsuvan, Thanisara. "Power management in Wireless Sensor Networks (WSNs)." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/13499.

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The wireless sensor network (WSN) is increasingly used in many areas nowadays. It can be applied to provide the solutions to environmental problems, help increasing security and safety systems, and make the detection of the problems more efficient, e.g. the earthquake or tidal wave, which will harmful to humans. The WNS is durable and resistant to all types of terrain and climate, but while the WSN system is more and more widespread, one of the obstacles hindering the growth of this technology and the demand for WSN applications is the limited battery lifespan. Consequently, there is a signifi
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5

Peng, Bo. "Energy-efficient geographic routing in realistic WSNs." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522967.

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6

Toussi, Ahora Mehdi. "Energy and QoS aware routing for WSNs." Thesis, Kingston University, 2017. http://eprints.kingston.ac.uk/41130/.

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The advancement of Wireless Sensor Networks (WSNs), necessitate optimisation of their algorithms and their performance. More specifically, network coverage and preservation of nodes energy to increase the network's lifetime are among the core objectives of routing and clustering methods. This thesis constitutes of a literature review of WSNs' routing protocols in a categorised manner followed by proposing an energy efficient and QoS aware paradigm (PUSH) for flat network that outperform other similar paradigms in terms of collective delay and energy dissipation within the network. We have prop
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Rukpakavong, Wilawan. "Energy-efficient and lifetime aware routing in WSNs." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/14497.

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Network lifetime is an important performance metric in Wireless Sensor Networks (WSNs). Transmission Power Control (TPC) is a well-established method to minimise energy consumption in transmission in order to extend node lifetime and, consequently, lead to solutions that help extend network lifetime. The accurate lifetime estimation of sensor nodes is useful for routing to make more energy-efficient decisions and prolong lifetime. This research proposes an Energy-Efficient TPC (EETPC) mechanism using the measured Received Signal Strength (RSS) to calculate the ideal transmission power. This in
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8

Drira, Wassim. "Secure collection and data management system for WSNs." Phd thesis, Institut National des Télécommunications, 2012. http://tel.archives-ouvertes.fr/tel-00814664.

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Nowadays, each user or organization is already connected to a large number of sensor nodes which generate a substantial amount of data, making their management not an obvious issue. In addition, these data can be confidential. For these reasons, developing a secure system managing the data from heterogeneous sensor nodes is a real need. In the first part, we developed a composite-based middleware for wireless sensor networks to communicate with the physical sensors for storing, processing, indexing, analyzing and generating alerts on those sensors data. Each composite is connected to a physica
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9

Drira, Wassim. "Secure collection and data management system for WSNs." Electronic Thesis or Diss., Evry, Institut national des télécommunications, 2012. http://www.theses.fr/2012TELE0051.

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Le développement des réseaux de capteurs sans fil fait que chaque utilisateur ou organisation est déjà connecté à un nombre important de nœuds. Ces nœuds génèrent une quantité importante de données, rendant la gestion de ces données non évident. De plus, ces données peuvent contenir des informations concernant la vie privée. Les travaux de la thèse attaquent ces problématiques. Premièrement, nous avons conçu un middleware qui communique avec les capteurs physiques pour collecter, stocker, traduire, indexer, analyser et générer des alertes sur les données des capteurs. Ce middleware est basé su
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10

Khalafalla, Mazin. "Aperiodic Control for Quadruple Water tank system over WSAN." Thesis, KTH, Reglerteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91752.

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11

Khemapech, Ittipong. "PoRAP : an energy aware protocol for cyclic monitoring WSNs." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/1899.

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This work starts from the proposition that it is beneficial to conserve communication energy in Wireless Sensor Networks (WSNs). For WSNs there is an added incentive for energy-efficient communication. The power supply of a sensor is often finite and small. Replenishing the power may be impractical and is likely to be costly. Wireless Sensor Networks are an important area of research. Data about the physical environment may be collected from hostile or friendly environments. Data is then transmitted to a destination without the need for communication cables. There are power and resource constr
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12

Maheshwari, Hemat Kumar. "Optimizing range aware localization in wireless sensor networks (WSNs)." Thesis, University of Leeds, 2011. http://etheses.whiterose.ac.uk/1743/.

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The adoption of wireless sensor networks (WSNs) in numerous emerging applications have prevailed us to realize that smart living is no longer an imagination, it already exists. In emerging applications, localization is an essential function so that all the sensed information can be responded carefully. Among the range free and range aware localization, range aware localization has been the most promising for fine-grained accuracy. Range aware localization has two phases, ranging and localization. Location errors always exist no matter which ranging or localization technique is used. Therefore,
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Kondepu, Koteswararao. "Energy-efficient discovery strategies for WSNs with mobile elements." Thesis, IMT Alti Studi Lucca, 2012. http://e-theses.imtlucca.it/85/1/Kondepu_phdthesis.pdf.

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In sparse wireless sensor networks, data collection is carried out through specialized Mobile Elements (MEs) thatvisit sensor nodes, gather data, and transport them to the collection point. Since visit times are typically unpredictable, one of the main challenges in this kind of networks is the energy-efficient discovery of MEs by sensor nodes. This thesis focuses on adaptive discovery schemes, where the sensor node’s duty cycle is adjusted over time according to the probability that the ME is nearby. Initially, a hierarchical approach is proposed based on two different Beacon messages emitted
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Wen, Wen. "Energy Efficient Secure Key Management Schemes for WSNs and IoT." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35257.

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Secret sharing is critical to most applications making use of security and remains one of the most challenging research areas in modern cryptography. In this thesis, we propose a novel efficient multi-secret sharing scheme based on the Chinese remainder theorem (CRT) with two verification methods, while the previous works are mostly based on the Lagrange polynomial. Key management schemes play an important role in communication security in Wireless Sensor Networks (WSNs). While the previous works mainly targeting on two different types of WSNs: distributed and hieratical, in this thesis, we
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15

Katerinchuk, Valeri. "Heuristic multicast routing algorithms in WSNs with incomplete network knowledge." Thesis, King's College London (University of London), 2018. https://kclpure.kcl.ac.uk/portal/en/theses/heuristic-multicast-routing-algorithms-in-wsns-with-incomplete-network-knowledge(91a1331e-b2ef-40ba-91f6-7eb03e6296cb).html.

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16

Lindeza, Tiago João Gonçalves. "Concepção, integração e avaliação de sensores e actuadores numa WSAN." Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/10707.

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Mestrado em Engenharia Electrónica e Telecomunicações<br>Os avanços tecnológicos das últimas décadas na área da medicina potenciaram a diminuição da taxa de mortalidade e o aumento da esperança média de vida, traduzindo-se num aumento da população idosa. No entanto, esta tendência não tem sido acompanhada de igual progresso ao nível da qualidade de vida desta população. A escassez de recursos dos serviços de apoio social a par do aumento da população idosa são condicionantes que colocam uma pressão forte sobre o funcionamento destas instituições. É neste contexto que surge o projecto L
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17

Ghaddar, Alia. "Improving the quality of aggregation using data analysis in WSNs." Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10068/document.

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L'adoption des réseaux de capteurs sans fil (WSNs) dans divers secteurs continuent à croître, comme la médecine, la domotique, le contrôle de processus industriels, la localisation des objets, etc. Cela revient à l'émergence de capteurs de plus en plus petits et de plus en plus intelligents dans notre vie quotidienne. Ces dispositifs interagissent avec l'environnement ou d'autres périphériques, pour analyser les données et produire de l'information. En plus de créer de l'information, ils permettent, une intégration transparente de la technologie virtuelle autour de nous. En effet, ces objets s
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18

Altaf, Faisal. "Modeling and Event-Triggered Control ofMultiple 3D Tower Cranes over WSNs." Thesis, KTH, Reglerteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105122.

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Wireless control of 3D tower cranes is a topic of great industrial significance as it offers greater flexibility and lower maintenance cost. But the reduction in shared network resource utilization and the desired level of control performance against packet losses and delays are main concerns. Our first aim is to develop a mathematical model of the 3D tower crane for the control design purpose. The second aim is to design a model-based eventtriggered controller for wireless control of multiple 3D tower cranes to asymptotically track step reference inputs. The controller and cranes are connecte
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Kumbakonam, Chandrasekar Ramalingam. "PROVIZ: an integrated graphical programming, visualization and scripting framework for WSNs." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47633.

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Wireless Sensor Networks (WSNs) are rapidly gaining popularity in various critical domains like health care, critical infrastructure, and climate monitoring, where application builders have diversified development needs. Independent of the functionalities provided by the WSN applications, many of the developers use visualization, simulation, and programming tools. However, these tools are designed as separate stand-alone applications, which force developers to use multiple tools. This situation often poses confusion and hampers an efficient development experience. To avoid the complexity of us
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20

Caione, Carlo <1984&gt. "Ultra-low power WSNs: distributed signal processing and dynamic resource management." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5397/1/Caione_Carlo_tesi_V2.pdf.

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This thesis presents several data processing and compression techniques capable of addressing the strict requirements of wireless sensor networks. After introducing a general overview of sensor networks, the energy problem is introduced, dividing the different energy reduction approaches according to the different subsystem they try to optimize. To manage the complexity brought by these techniques, a quick overview of the most common middlewares for WSNs is given, describing in detail SPINE2, a framework for data processing in the node environment. The focus is then shifted on the in-networ
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Caione, Carlo <1984&gt. "Ultra-low power WSNs: distributed signal processing and dynamic resource management." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5397/.

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This thesis presents several data processing and compression techniques capable of addressing the strict requirements of wireless sensor networks. After introducing a general overview of sensor networks, the energy problem is introduced, dividing the different energy reduction approaches according to the different subsystem they try to optimize. To manage the complexity brought by these techniques, a quick overview of the most common middlewares for WSNs is given, describing in detail SPINE2, a framework for data processing in the node environment. The focus is then shifted on the in-networ
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22

Biswas, Kamanashis. "Energy Efficient Secure Routing in Wireless Sensor Networks." Thesis, Griffith University, 2016. http://hdl.handle.net/10072/365658.

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Wireless Sensor Networks (WSNs) can contain thousands of small, inexpensive sensors that are randomly deployed in open and harsh environments to collect data. The short lifespan of the battery-operated sensors and the hostile environments necessitate the development of energy ecient and secure protocols in sensor networks. Among the wide variety of network protocols, routing plays the most signicant role in energy consumption since 70% of the total energy is consumed for data transmission in WSNs. Therefore, it is necessary to design energy ecient routing schemes to conserve energy and prolong
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23

Cano, Bastidas Cristina. "A low power listening with wake up after transmissions MAC protocol for WSNs." Doctoral thesis, Universitat Pompeu Fabra, 2011. http://hdl.handle.net/10803/22717.

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In the last few years Wireless Sensor Networks (WSNs) have become an interesting field of research mainly due to the challenges and constraints of their design and the broad range of potential applications they can provide. One of the most important constraints is the limited energy resources of the sensor nodes that directly influences the design of the Medium Access Control (MAC) layer, as it is the responsible of controlling the transceiver that is the most consuming component of a sensor node. In this thesis the limitations of preamble sampling, one of the most well-known MAC protocols for
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24

Mahmud, Arif. "Transmitter macrodiversity in WSAN and MANET : Energy consumption algorithms for wireless multihop networks." Thesis, Mid Sweden University, Department of Information Technology and Media, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-11382.

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<p>Three of the most important factors with regards to wireless multi-hop networks, namely reachability, energy consumption and network stability are considered in our transmitter macrodiversity supported broadcasting routing algorithms. Broadcasting applications are not only used to send routing table, queries, programming logic, any specific request etc. to all the nodes from access point but are also capable of playing a vital role in wireless TV distributions and visual sensor networks. All the algorithms are simulated in the MATLAB environment in which the nodes are random and are battery
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25

Perito, Daniele. "Exécution sécurisée de code sur systèmes embarqués." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00639053.

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Les systèmes embarqués sont utilisés dans de nombreux systèmes critiques, depuis les automobiles jusqu'aux les systèmes de contrôle industriels. La plupart des recherches sur ces systèmes embarqués se sont concentrés sur l'amélioration de leur fiabilité face à des fautes ou erreurs de fonctionnent non intentionnelles, moins de travaux on été réalisés considérant les attaques intentionnelles. Ces systèmes embarqués sont de plus en plus connectés, souvent à Internet, via des réseaux sans fils, par exemple pour leur administration à distance. Cela augmente les risques d'attaques à distance ou d'i
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Allen, M. "Acoustic localisation for real-life applications of wireless sensor networks." Thesis, Coventry University, 2009. http://curve.coventry.ac.uk/open/items/859e107f-3ece-f043-75cd-7676dde0f896/1.

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The work described in this thesis is concerned with self-localisation (automated estimation of sensor locations) and source-localisation (location of a target) using Wireless Sensor Networks (WSNs). The motivation for the research in this thesis is the on-line localisation of marmots from their alarm calls. The application requires accurate 3D self-localisation (within a small percentage of sensor spacing) as well as timely operation. Further challenges are added by the high data-rate involved: sensor nodes acquire data at a rate that is greater than the available network bandwidth. This data
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Mysore, Sachidananda Vinay. "On Maximizing the Efficiency of Multipurpose WSNs Through Avoidance of Over- or Under-Provisioning of Information." Phd thesis, TU Prints, 2014. http://tuprints.ulb.tu-darmstadt.de/4207/8/Thesis_Ganesha_Vinay_2014.pdf.

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A wireless sensor network (WSN) is a distributed collection of sensor nodes, which are resource constrained and capable of operating with minimal user attendance. The core function of a WSN is to sample physical phenomena and their environment and transport the information of interest, such as current status or events, as required by the application. Furthermore, the operating conditions and/or user requirements of WSNs are often desired to be evolvable, either driven by changes of the monitored phenomena or by the properties of the WSN itself. Consequently, a key objective for setting up/conf
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Baptista, Adérito Herculano Sarmento. "Dynamic adaptation of interaction models for stateful web services." Master's thesis, Faculdade de Ciências e Tecnologia, 2011. http://hdl.handle.net/10362/12042.

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Dissertação para obtenção do Grau de Mestre em Engenharia Informática<br>Wireless Sensor Networks (WSNs) are accepted as one of the fundamental technologies for current and future science in all domains, where WSNs formed from either static or mobile sensor devices allow a low cost high-resolution sensing of the environment. Such opens the possibility of developing new kinds of crucial applications or providing more accurate data to more traditional ones. For instance, examples may range from large-scale WSNs deployed on oceans contributing to weather prediction simulations; to high numb
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Poe, Wint Yi [Verfasser], Jens B. [Akademischer Betreuer] Schmitt, and Lars [Akademischer Betreuer] Wolf. "Design Problems in Large-Scale, Time-Sensitive WSNs / Wint Yi Poe. Betreuer: Jens B. Schmitt ; Lars Wolf." Kaiserslautern : Technische Universität Kaiserslautern, 2013. http://d-nb.info/1042185700/34.

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Sanborn, Mark A. "A Model for Field Deployment of Wireless Sensor Networks (WSNs) within the Domain of Microclimate Habitat Monitoring." NSUWorks, 2011. http://nsuworks.nova.edu/gscis_etd/296.

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Wireless sensor networks (WSNs) represent a class of miniaturized information systems designed to monitor physical environments. These smart monitoring systems form collaborative networks utilizing autonomous sensing, data-collection, and processing to provide real-time analytics of observed environments. As a fundamental research area in pervasive computing and envisioned as large-scale autonomous networks of communicating nodes capable of monitoring conditional metrics over vast geographic areas, WSNs have the potential to provide researchers and conservationists with increased knowledge of
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31

Souza, Oliveira Camila Helena. "Reliability and cost efficiency in coding-based in-network data storage and data retrieval for IoT/WSNs." Thesis, Paris Est, 2015. http://www.theses.fr/2015PESC1134/document.

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Dans cette thèse, nous nous intéressons à cette gestion des données dans les réseaux de capteurs sans fil intégrés dans un contexte IoT. Plus précisément, nous aborderons la problématique du stockage des données au sein même du réseau de capteurs en se posant la question suivante : Comment stocker provisoirement les données dans le réseau de capteurs de sorte que ces données soient facilement accessible par les consommateurs tout en assurant le meilleur compromis entre la fiabilité de livraison des donnés et la préservation des ressources énergétiques des capteurs ?Il s'agit dans un premier te
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Abidoye, Ademola Philip. "Energy optimization for wireless sensor networks using hierarchical routing techniques." University of the Western Cape, 2015. http://hdl.handle.net/11394/7064.

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Philosophiae Doctor - PhD<br>Wireless sensor networks (WSNs) have become a popular research area that is widely gaining the attraction from both the research and the practitioner communities due to their wide area of applications. These applications include real-time sensing for audio delivery, imaging, video streaming, and remote monitoring with positive impact in many fields such as precision agriculture, ubiquitous healthcare, environment protection, smart cities and many other fields. While WSNs are aimed to constantly handle more intricate functions such as intelligent computation,
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Nilsson, Emil, and Tommy Lindman. "Implementation and evaluation of Bluetooth Low Energy as a communication technology for wireless sensor networks." Thesis, Linköpings universitet, Interaktiva och kognitiva system, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-138672.

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As the growth and enthusiasm for IoT increases, energy consumption and efficiency is of immense importance in order to develop maintainable and dependable sensor networks. In this thesis, we implement and evaluate a wireless sensor network using Bluetooth Low Energy (BLE) as the communication standard with regards to energy consumption and range capabilities. We found BLE to be a highly viable option for such systems, yielding long battery life for systems where long-range capabilities are not needed.
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Severino, Ricardo Augusto Rodrigues da Silva. "Improving QoS for large-scale WSNs." Doctoral thesis, 2015. https://repositorio-aberto.up.pt/handle/10216/82612.

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Nicholls, Gareth Michael. "Location inaccuracies in WSAN placement algorithms." Diss., 2010. http://hdl.handle.net/2263/26682.

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The random deployment of Wireless Sensor and Actuator Network (WSAN) nodes in areas often inaccessible, results in so-called coverage holes – i.e. areas in the network that are not adequately covered by nodes to suit the requirements of the network. Various coverage protocol algorithms have been designed to reduce or eliminate coverage holes within WSANs by indicating how to move the nodes. The effectiveness of such coverage protocols could be jeopardised by inaccuracy in the initial node location data that is broadcast by the respective nodes. This study examines the effects of location inacc
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Severino, Ricardo Augusto Rodrigues da Silva. "Improving QoS for large-scale WSNs." Tese, 2015. https://repositorio-aberto.up.pt/handle/10216/82612.

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Jian, Hao-Yang, and 簡浩洋. "Outlier-Filtered Time Synchronization Protocol for WSNs." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/14570911320329944366.

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碩士<br>國立交通大學<br>網路工程研究所<br>95<br>Time synchronization is considered an important issue for wireless sensor networks (WSNs) where many applications, such as object tracking and data aggregation, rely on the synchronization of the clock of each node. Some types of attacks, such as insider attack and pulse-delay attack, can be used to decrease the precisions of time synchronization protocols. Recently, many time synchronization protocols were designed with security concern. Some of them cannot defend against these attacks, while others cannot synchronize the relative clock skews and offsets simul
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Hsu, Chia Yu, and 徐嘉佑. "Multimedia Communications with Multi-channel Transceiver in WSNs." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/3v2p25.

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碩士<br>國立臺中教育大學<br>資訊工程學系<br>102<br>Over the past few years, wireless sensor network (WSN) has become the main technology to monitor environmental and physical phenomena. As the technology matures, even in the Zigbee network it is possible to send multimedia streaming data. Therefore, the main purpose of this thesis is to provide real-time services in the Zigbee network. The design and implementation of the thesis will provide real-time multimedia streaming multi-channel transceiver, which combined voice compression technology open source Speex and video compression technology, open source x264
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Lin, Chun-Lung, and 林俊隆. "Optimal Rate Allocation with Distortion Guarantee in WSNs." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/61517378329329772566.

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博士<br>國立清華大學<br>資訊工程學系<br>98<br>近年來，失真壓縮技術已被廣泛應用在長期收集大量連續資料的無線感知器網路系統以延長整體系統運作生命期，因為這些系統主要是收集長期的資料趨勢、分析有意義的統計數據、以及找出感興趣的特定資料樣板，所以通常可以允許少許的資料失真以及不需要及時的資料收集。在這些系統中，感知器被佈建來收集大量連續資料，而相鄰感知器的資料經常具備時間、空間的關連性，為了利用這些關聯性減少資料傳輸量，中間節點的感知器可將自己所收集的資料以及從鄰近節點所傳輸過來資料利用失真壓縮技術壓縮。過去的研究多著重在達到高壓縮率、有效省電以及分散式壓縮等議題，然而一個好的壓縮技術，均需輔以一個最佳化傳輸位元率分配的理論基礎，失真壓縮則是可以有效的透過Rate-distortion 的策略大量減少所需傳輸量。這篇論文研究透過rate-distortion最佳化分配，達到感知器系統省電的目的: 如何在滿足使用者對於資料失真度所能接受的需求下，最佳的決定如何分配各個感知器的壓縮位元率。一旦位元率能夠被準確的決定，感知器的資料就能夠很有效率的進行壓縮，達到傳輸最少的資料量，滿足使用者的查詢。本篇論文將rate-distortion 最佳化分配問題數學化，並且提出一個最佳化分配的數學解，為了要適應感知器網路的分散壓縮需求，我也根據數學最佳解提出一個分散式分配的策略，基於所提
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40

Yang, Yuan-Cheng, and 楊源誠. "Data Caching Techniques for Information Storage on WSNs." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/09556319274061208742.

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41

Abreu, Henrique Castro. "Monotorização das condições atmosféricas nas autoestradas utilizando WSNs." Master's thesis, 2014. http://hdl.handle.net/1822/42015.

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Dissertação de mestrado integrado em Engenharia Eletrónica Industrial e Computadores<br>Ao longo dos anos, condições atmosféricas adversas nas autoestradas provocaram inúmeros acidentes rodoviários responsáveis por danos nas viaturas e infraestruturas civis, e infelizmente, acidentes fatais. Atualmente, apesar do esforço para evitar estas situações através de melhorias na segurança e avisos de condições menos favoráveis o número de acidentes ainda é demasiado elevado. De forma a contribuir para a resolução deste problema, no âmbito do projeto QREN SI I&DT SustIMS, em co-promoção com a em
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42

Alves, João André Varino. "Timelywsn: middleware architecture for probabilistic support in WSNs." Master's thesis, 2013. http://hdl.handle.net/10451/10067.

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Tese de mestrado em Segurança Informática, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2013<br>Recentemente, tem existido muito interesse e investigação no campo das redes de sensores sem fios (WSNs), redes ad-hoc sem fios, compostas por centenas a milhares de nós computacionais, equipados com equipamento sensorial, que medem o estado de entidades físicas. As WSNs podem ser utilizadas em numerosos cenários e aplicações, por exemplo, para a prevenção e deteção de incêndios florestais, monitorização industrial, ou monitorização da saúde de pacientes. Muitas destas apl
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43

Lin, Shaing-Ting, and 林湘婷. "A Grid-based Hole Detection Scheme in WSNs." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/98101972054343951121.

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碩士<br>淡江大學<br>資訊工程學系碩士在職專班<br>98<br>Wireless Sensor Networks (WSNs) can be widely utilized in many applications especially in environmental surveillance. However, there exist some holes within the WSNs caused by some factors such as non-uniform deployment of sensor nodes, the existence of physical obstacle such as mountains and lakes, some sensor nodes deplete their energy, and being destroyed by outside forces. These holes will degrade the performance of wireless sensor networks (WSNs). Hence, how to discover the position of the holes and utilize the information to improve the performance of
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44

Hong, Jialing, and 洪佳鈴. "Using Conjugate Gradient Method for Routing in WSNs." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/91422475397879582875.

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碩士<br>國立中正大學<br>資訊工程研究所<br>100<br>We discuss the routing path from macroscopic view in wireless sensor network, it unlike the previous graphical ways. We consider the whole range with global optimization. The routing problem can be described a partial differential equations (PDEs) by mathematical analysis, then we use finite difference method to find the approximation solution of PDEs, to find the liner equations in the rule. Liner equations can be solved by Gauss-Seidel Iteration and Conjugate gradient method, and we option the routing path for load balance. Conjugate gradient method is one o
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Lien, Shin-Lu, and 連新路. "Recovery Mechanism for Diff-based Reprogramming in WSNs." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/43949473085522613666.

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碩士<br>國立暨南國際大學<br>資訊管理學系<br>101<br>Reprogramming remote sensor nodes on wireless sensor networks (WSNs) allows the software on them to be dynamically updated or enhanced for adapting to changed environmental conditions or application requirements. Many researches use diff-based approaches to transmit only the code difference to sensor nodes for updating. When traditional full image replacement reprogramming mechanism fails, sensor nodes can simply perform self-recovery by retrying or reloading the stored full image of the previous version, but failure of diff-based reprogramming may cause extr
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Shiu, Jiun-Liang, and 許鈞喨. "Routing Decisions for Hybrid Information Transmission in WSNS." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/69ehyp.

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碩士<br>真理大學<br>資訊工程學系碩士班<br>106<br>The Routing applications is popular In Wireless Sensor Networks (WSNs). Most of previous applications do not recognize the different data. For a practical monitor-ing environment, the monitoring events may be varied, and so do the data sinks. We propose a distributed mechanism to arrange the routing for transmitting the event data to proper sink as soon as possible. The routing decides according to the transmission records as well as the remaining energy of itself and its neighbor. Fur-thermore, the mobile sensors in the environments may move to support moni
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Yu, Su-Mong, and 尤淑孟. "Cooperative Target Tracking in WSNs with Distributed Particle Filtering." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/96249107966871088208.

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碩士<br>國立中興大學<br>電機工程學系所<br>99<br>This thesis presents distributed methods for target tracking in wireless sensor networks. We consider flat network and cluster-based network topologies for target tracking and provide leader-based information processing to track the target. The method with a flat network uses a timer to create clusters dynamically and the method with a cluster-based network uses the Clustering Algorithm via Waiting Timer (CAWT) to create the cluster model. Particle filtering is applied to estimate the location of the target, and then Covariance Intersection algorithm is used to
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Abdah, Hadeel Mohamad-Ali. "Selective reprogramming of WSNs: energetic study and functionality optimization." Master's thesis, 2016. http://hdl.handle.net/1822/47320.

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Dissertação de mestrado em Engenharia de Redes e Serviços Telemáticos<br>Wireless sensors networks consist of large numbers of small, battery-powered, self-organizing computing motes. Nowadays, these networks are considered ideal candidates for a wide range of applications such as environmental monitoring, military operations and other application fields where it is hard to maintain a continuous presence of human beings. Online remote reprogramming is usually carried out to update the code running on nodes due to factors such as changes in the environment or application. Remote reprogramming
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Branco, Nuno André Dias. "WSNs pervasivas aplicadas a sistemas de apoio à vida." Master's thesis, 2014. http://hdl.handle.net/10348/3033.

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Dissertação de Mestrado em Engenharia Electrotécnica e de Computadores<br>A crise demográfica e económica em que actualmente a Europa e por conseguinte Portugal, obrigam a que o serviço nacional de saúde tenha de trabalhar com menos pessoal médico para uma maior quantidade de utentes em cuidados continuados. Os meios tecnológicos que hoje existem permitem oferecer uma melhor e maior quantidade de serviços, entre os quais de localização e monitorização em tempo real de utentes em regime hospitalar, oferecendo assim tanto a utentes e auxiliares uma melhor qualidade de vida. Esta dissertaç
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Cheng, Ren-Hau, and 鄭人豪. "Path Guiding Mechanisms for Improving Location Accuracy in WSNs." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/79634877544624121818.

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碩士<br>淡江大學<br>資訊工程學系碩士班<br>95<br>In the most proposed range-free algorithms, nodes estimate their location using the geometric constraints imposed by the location of mobile anchor. However, there is no discussion on how the mobile anchor moves so that all sensor nodes can obtain the maximal location accuracies under the constraints of time for localization or the remaining energy of the robot. This paper assumes that traditional range-free algorithms have been executed for a certain time period and the deployed sensors are with different location accuracies. We propose path guiding mechanisms
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