Dissertations / Theses on the topic 'Collaborative Fusion'
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Haj, Chhadé Hiba. "Data fusion and collaborative state estimation in wireless sensor networks." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2207/document.
Full textThe aim of the thesis is to develop fusion algorithms for data collected from a wireless sensor network in order to locate multiple sources emitting some chemical or biological agent in the air. These sensors detect the concentration of the emitted substance, transported by advection and diffusion, at their positions and communicate this information to a treatment center. The information collected in a collaborative manner is used first to locate the randomly deployed sensors and second to locate the sources. Applications include, amongst others, environmental monitoring and surveillance of sensitive sites as well as security applications in the case of an accidental or intentional release of a toxic agent. However, the application we consider in the thesis is that of landmine detection and localization. In this approach, the land mines are considered as sources emitting explosive chemicals. The thesis includes a theoretical contribution where we extend the Belief Propagation algorithm, a well-known data fusion algorithm that is widely used for collaborative state estimation in sensor networks, to the bounded error framework. The novel algorithm is tested on the self-localization problem in static sensor networks as well as the application of tracking a mobile object using a network of range sensors. Other contributions include the use of a Bayesian probabilistic approach along with data analysis techniques to locate an unknown number of vapor emitting sources
Narayanan, Siddharth. "Cinemacraft: Exploring Fidelity Cues in Collaborative Virtual World Interactions." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/82142.
Full textMaster of Science
Taher, Razan. "Recherche d'Information Collaborative." Phd thesis, Université Joseph Fourier (Grenoble), 2004. http://tel.archives-ouvertes.fr/tel-00006500.
Full textNasman, James M. "Deployed virtual consulting : the fusion of wearable computing, collaborative technology, augmented reality and intelligent agents to support fleet aviation maintenance /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Mar%5FNasman.pdf.
Full textThesis advisor(s): Alex Bordetsky, Gurminder Singh. Includes bibliographical references (p. 49). Also available online.
Al, Hage Joelle. "Fusion de données tolérante aux défaillances : application à la surveillance de l’intégrité d’un système de localisation." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10074/document.
Full textThe interest of research in the multi-sensor data fusion field is growing because of its various applications sectors. Particularly, in the field of robotics and localization, the use of different sensors informations is a vital step to ensure a reliable position estimation. In this context of multi-sensor data fusion, we consider the diagnosis, leading to the identification of the cause of a failure, and the sensors faults tolerance aspect, discussed in limited work in the literature. We chose to develop an approach based on a purely informational formalism: information filter on the one hand and tools of the information theory on the other. Residuals based on the Kullback-Leibler divergence are developed. These residuals allow to detect and to exclude the faulty sensors through optimized thresholding methods. This theory is tested in two applications. The first application is the fault tolerant collaborative localization of a multi-robot system. The second application is the localization in outdoor environments using a tightly coupled GNSS/odometer with a fault tolerant aspect
Coyle, Timothy P. "Eyes of the storm: can fusion centers play a crucial role during the response phase of natural disasters through collaborative relationships with emergency operations centers?" Thesis, Monterey, California: Naval Postgraduate School, 2014. http://hdl.handle.net/10945/43896.
Full textCHDS State/Local
Through the maturation of the national network of fusion centers, processes and capabilities originally designed to detect and thwart terrorist attacks are now applied to disaster responses. The fusion process, which involves the synthesis and analysis of streams of data, can create incident specific intelligence. The sharing of this information can enhance the operating picture that is critical to key decision makers and the discipline of emergency management. This thesis examined three case studies of fusion center disaster responses through a collaborative-based analytical framework. The resulting analysis of the case studies identified the crucial role played by fusion centers in responding to disaster events in a collaborative effort with emergency operations centers. This thesis concludes that fusion centers offer the greatest impact through enabling information sharing throughout the response phase. The specific benefits of the sharing of information directly influence executive briefings and the deployment of resources. This thesis also modeled a collaborative response. The research determined that the depth and breadth of these relationships involving cooperative responses must be proportionate to the incident and include a level of redundancy. Through a system design model, overconnectivity through efficiency was shown to increase the likelihood of fracturing cooperative relationships.
Daass, Bilal. "Approches informationnelles pour une navigation autonome collaborative de robots d'exploration de zones à risques." Thesis, Lille 1, 2020. http://www.theses.fr/2020LIL1I054.
Full textIn the recent years, there was a growing interest to provide an accurate estimate of the state of a dynamic system for a wide range of applications. In this work, we target systems built up with several collaborative subsystems integrating various heterogeneous sensors. We introduce a filter concept that combines the advantages of both Kalman and informational filters to achieve low computational load. To consider any system whose measurement covariances are incomplete or unknown, a multi-sensor fusion based on the covariance intersection is analyzed in terms of calculation burden. Three multi-sensor fusion architectures are then considered. A fine analysis of the calculation load distribution of the filter and the covariance intersection algorithm is performed on the different components of these architectures. To make the system fault tolerant, informational statistical methods are developed. They are applicable to any method based on the generalized likelihood ratio. They lead to an adaptive threshold of this ratio. The technique has been implemented considering two types of control charts for the fast detection of sensor failures. Our theoretical approaches are validated through a system of collaborative mobile robots. We integrate a diagnosis and fault detection phase, which is based on the integration of these informational statistical methods into the fusion and estimation process, the latter being composed of a Bayesian filter and the covariance intersection. The main objective is to ensure that this system provides safe, accurate and fault-tolerant autonomous navigation. Finally, we present a proof-of-concept method for nondestructive and evaluation of materials in close proximity of the robot environment. In particular, we introduce a microwave sensor to characterize the electromagnetic wave to material under test interaction. This technique, known under the name radar, had a growing interest in academic laboratories and for usual applications related to speed measurements. Nevertheless, its adaptation to collaborative mobile robots remains a challenging task to address contactless characterization of materials, especially in harsh environments. This latter consists to determine the material characteristics from embedded microwave sensors
Liu, Zhenjiao. "Incomplete multi-view data clustering with hidden data mining and fusion techniques." Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAS011.
Full textIncomplete multi-view data clustering is a research direction that attracts attention in the fields of data mining and machine learning. In practical applications, we often face situations where only part of the modal data can be obtained or there are missing values. Data fusion is an important method for incomplete multi-view information mining. Solving incomplete multi-view information mining in a targeted manner, achieving flexible collaboration between visible views and shared hidden views, and improving the robustness have become quite challenging. This thesis focuses on three aspects: hidden data mining, collaborative fusion, and enhancing the robustness of clustering. The main contributions are as follows:1. Hidden data mining for incomplete multi-view data: existing algorithms cannot make full use of the observation of information within and between views, resulting in the loss of a large amount of valuable information, and so we propose a new incomplete multi-view clustering model IMC-NLT (Incomplete Multi-view Clustering Based on NMF and Low-Rank Tensor Fusion) based on non-negative matrix factorization and low-rank tensor fusion. IMC-NLT first uses a low-rank tensor to retain view features with a unified dimension. Using a consistency measure, IMC-NLT captures a consistent representation across multiple views. Finally, IMC-NLT incorporates multiple learning into a unified model such that hidden information can be extracted effectively from incomplete views. We conducted comprehensive experiments on five real-world datasets to validate the performance of IMC-NLT. The overall experimental results demonstrate that the proposed IMC-NLT performs better than several baseline methods, yielding stable and promising results.2. Collaborative fusion for incomplete multi-view data: our approach to address this issue is Incomplete Multi-view Co-Clustering by Sparse Low-Rank Representation (CCIM-SLR). The algorithm is based on sparse low-rank representation and subspace representation, in which jointly missing data is filled using data within a modality and related data from other modalities. To improve the stability of clustering results for multi-view data with different missing degrees, CCIM-SLR uses the Γ-norm model, which is an adjustable low-rank representation method. CCIM-SLR can alternate between learning the shared hidden view, visible view, and cluster partitions within a co-learning framework. An iterative algorithm with guaranteed convergence is used to optimize the proposed objective function. Compared with other baseline models, CCIM-SLR achieved the best performance in the comprehensive experiments on the five benchmark datasets, particularly on those with varying degrees of incompleteness.3. Enhancing the clustering robustness for incomplete multi-view data: we offer a fusion of graph convolution and information bottlenecks (Incomplete Multi-view Representation Learning Through Anchor Graph-based GCN and Information Bottleneck - IMRL-AGI). First, we introduce the information bottleneck theory to filter out the noise data with irrelevant details and retain only the most relevant feature items. Next, we integrate the graph structure information based on anchor points into the local graph information of the state fused into the shared information representation and the information representation learning process of the local specific view, a process that can balance the robustness of the learned features and improve the robustness. Finally, the model integrates multiple representations with the help of information bottlenecks, reducing the impact of redundant information in the data. Extensive experiments are conducted on several real-world datasets, and the results demonstrate the superiority of IMRL-AGI. Specifically, IMRL-AGI shows significant improvements in clustering and classification accuracy, even in the presence of high view missing rates (e.g. 10.23% and 24.1% respectively on the ORL dataset)
Vissière, David. "Solution de guidage-navigation-pilotage pour véhicules autonomes hétérogènes en vue d'une mission collaborative." Phd thesis, École Nationale Supérieure des Mines de Paris, 2008. http://pastel.archives-ouvertes.fr/pastel-00004492.
Full textKidon, Jonathan Goldberg. "Fusion Tables : new ways to collaborate on structured data." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/60999.
Full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (p. 55).
Fusion Tables allows data collaborators to create, merge, navigate and set access control permissions on structured data. This thesis focuses on the collaboration tools that were added to Googles Fusion Tables. The collaboration tools provided additional functionality: first, the ability to view, sort and filter all the threaded discussions on the different granularities of the data set; second, the ability to take Snaps, dynamic state bookmarking that allows collaborators to save queries and visualizations and share them with other users. In addition, this thesis initiates a discussion about data collaboration on different platforms outside the Data Management System (DMS), and the implementation of the Fusion Table - Google Wave gadget that provides this functionality. To evaluate these added features, we conducted a user survey based on three sources: Google Analytics, field study of experienced Fusion Tables users, and a user study to evaluate the UI and the collaboration tools. The results showed that approximately 40% of the visitors to the site use the collaboration features . Based on the user study, it appears that UI improvements can increase exposure to these features, and some additional functionality can be added to improve the collaboration features and provide a better collaboration system.
by Jonathan Goldberg Kidon.
M.Eng.
Grozavu, Nistor. "Classification topologique pondérée : approches modulaires, hybrides et collaboratives." Paris 13, 2009. http://www.theses.fr/2009PA132022.
Full textThis thesis is focused, on the one hand, to study clustering anlaysis approaches in an unsupervised topological learning, and in other hand, to the topological modular, hybrid and collaborative clustering. This study is adressed mainly on two problems: - cluster characterization using weighting and selection of relevant variables, and the use of the memory concept during the learning unsupervised topological process; - and the problem of the ensemble clustering techniques : the modularization, the hybridization and collaboration. We are particularly interested in this thesis in Kohonen's self-organizing maps which have been widely used for unsupervised classification and visualization of multidimensional datasets. We offer several weighting approaches and a new strategy which consists in the introduction of a memory process into the competition phase by calculating a voting matrix at each learning iteration. Using a statistical test for selecting relevant variables, we will respond to the problem of dimensionality reduction, and to the problem of the cluster characterization. For the second problem, we use the relational analysis approach (RA) to combine multiple topological clustering results
Palmer, Racquel Nicola. "An Examination into Fusion Centers Impact on Information Sharing Post 9/11." ScholarWorks, 2020. https://scholarworks.waldenu.edu/dissertations/7976.
Full textVan, Den Berg Cindy. "Quels leviers pour une collaboration efficace ? : le rôle de la confiance et de la culture : le cas de la fusion-acquisition entre Air-France et KLM." Thesis, Paris 1, 2016. http://www.theses.fr/2016PA01E006.
Full textMerger-acquisition is the most widespread mode of external development for dealing with the changing environment of business (Jacob and Poitras, 2015). The main objective of a merger-acquisition is most often seeking for synergies. However, in order to achieve the objectives of the new entity, individuals must work together to create collective efficiency that adds value to the work they realize (Morin, 2015). Nevertheless, we find no studies in the scientific literature on how to promote effective inter-individual collaboration after a merger-acquisition.This PhD proposes a research model integrating the various determinants of collaboration and pays particular attention to the extent of the influence of trust and culture that play, according to the existing literature, an important role in the effectiveness of inter-individual collaboration. The results of a qualitative study, based on 44 interviews, and a quantitative study, based on 301 questionnaires, that are both realized at Air France-KLM, allow us to see that trust and culture have an important and indirect influence on the effectiveness of collaboration.Our study confirms firstly the importance of studying inter-individual collaboration by showing that its effectiveness determines 68% of the realization of the objectives of the organization. Secondly, we observe that trust is essential for good communication and strong social cohesion, which in turn account for 58% of the effectiveness of collaboration. Thus, we remark that interpersonal trust influences the effectiveness of collaboration indirectly. This is also the case for culture. Power distances in corporate culture and avoidance of uncertainty in national culture have a negative impact on trust and social cohesion. Since social cohesion and communication determine the effectiveness of collaboration, we could conclude that cultural aspects influence the effectiveness of collaboration indirectly
Strat, Sabin Tiberius. "Analyse et interprétation de scènes visuelles par approches collaboratives." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00959081.
Full textWorack, Stephan. "Indigenous invention, M&A, and international collaboration : essays on China's rise to innovation." Thesis, Paris 1, 2018. http://www.theses.fr/2018PA01E054.
Full textThe subject of this doctoral thesis revolves around the analysis of China’s policies, foreign direct investment, and international collaboration with regard to innovation. Chapter one, co-written with Ilja Rudyk, explores the rise of Chinese inventions in Europe, China’s innovation policies, and assesses their effect with regard to domestic ownership in strategic technologies through the lens of European patent data. Further, our methodology allows for an assessment of effects of the policies on characteristics of the patents, reflecting their quality. Chapter two, joint work with Anthony Howell and Jia Lin, investigates the effects of Chinese cross-border mergers and acquisitions on the domestic innovation activities and financial performance of the firms engaging in such foreign direct investment. The third chapter addresses the relationship between international collaboration and patent quality through an analysis of Chinese patent applications in Europe. It investigates the pattern of Chinese international co-inventions in Europe and scrutinizes the role cross-border co-invention play for the quality of Chinese overseas patent applications. It thereby contributes to the understanding of China’s internationalization and technological catch-up
Patrix, Jérémy. "Détection de comportements à travers des modèles multi-agents collaboratifs, appliquée à l'évaluation de la situation, notamment en environnement asymétrique avec des données imprécises et incertaines." Phd thesis, Université de Caen, 2013. http://tel.archives-ouvertes.fr/tel-00991091.
Full textQiu, Jun-Wei, and 邱俊瑋. "Collaborative Indoor Localization Based on Sensor Fusion with Particle Filter." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/k4me3r.
Full text國立交通大學
資訊科學與工程研究所
105
In this research, an indoor localization framework based on Bayesian approximation theory is proposed, which treats the users' locations in the tracking area as a probability distribution. However, it is difficult to model such distribution in well-formed mathematical formulas in indoor buildings. The approximation is realized using the particle filter algorithm, in which the distribution is sampled with discrete weighted particles in the tracking area. The system can therefore track a user's location distribution by shifting and weighting the particles according to the observation provided by the sensors. A typical implementation of particle filter tracking system would consists of a pedestrian tracking mechanism to obtain motion displacement indicators for particle shifting, and a wireless ranging scheme to obtain wireless location indicators for weighting. In this research, the tracking scheme is extended to 2.5D, which models the indoor structures as multiple 2D floor plans and floor transitional facilities. The proposed tracking scheme is capable of detect floor levels and transition using the inertial landmark indicators formed by inertial pattern recognition, and floor/altitude indicator with atmospheric pressure detection. For 2D localization, a signboard recognition scheme is designed to generate visual landmark indicators. Also, an M2M encountering scheme enables the users to conduct collaborative ranging at short distances to create accurate inter-device encounter indicators, which can be applied when a user with high location uncertainty caused by insufficient infrastructural coverage or highly motion dynamics. Finally, an adaptive ranging mechanism is designed to use inter-beacon ranging to sense the signal propagation dynamics caused environmental changes. The scheme is implemented using Bluetooth beacons, and the sensed environmental dynamics can be delivered to the used devices simply using BLE advertisement packets.
Chang, Li-Yuan, and 張力元. "Fault-Tolerant Decision Fusion via Collaborative Sensor Fault Detection in Wireless Sensor Networks." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/35150258221132959515.
Full text國立暨南國際大學
資訊工程學系
94
Abstract Because of the exponential growth in the underlying semiconductor technology and the wide use of the wireless networking, many sensor nodes with computing ability, storage capability, and the power of communication are manufactured. The application of wireless sensor networks, WSNs for short, has been quite practicable nowadays. We can place the sensor nodes near to the things or environments which we want to monitor. Through the sensor nodes’ sensing and the collaborative decision fusion of the sensor network, the true condition of the event can be known according to the data reported from the sensor nodes and does not need to be seen or sensed by ourselves. The message reported from each sensor node can be used to make decision fusion about the condition of the event. Sensor nodes are often deployed in harsh and inaccessible environments, and we must depend on the sensor nodes’ replies to know the true condition of the monitored environment. Therefore, the correctness of the data which is replied from the sensor nodes is very important. If the measurements replied from the sensor nodes are correct, these will help us to understand the real situation of the environment and pertinent decisions can be made as soon as possible. If the measurements replied from the sensor node are wrong, these will make us misunderstand the situation of the environment. In this way, the event can not be handled properly and this may cause a great damage to us. In order to solve the problem, there is a need to develop a means to detect the faulty sensor nodes or provide the fault-tolerance capability without the nearby involvement of human beings when utilizing WSNs to perform decision fusion of event detection. This thesis first introduces the operation of WSNs and the decision fusion. Then, a collaborative sensor fault detection scheme in WSNs is proposed. With the aid of the scheme, the faulty nodes can be easily identified and they are removed from the computation of the decision fusion. In such a way, WSNs will have better performance of the decision fusion than that without the fault detection scheme. After that, the proposed fault detection scheme is used to do a series of simulations of some kinds of different fault models, and its performance is also shown.
Van, den Berg Cindy. "Quels leviers pour une collaboration efficace ? : le rôle de la confiance et de la culture : le cas de la fusion-acquisition entre Air-France et KLM." Thesis, 2016. http://www.theses.fr/2016PA01E006/document.
Full textMerger-acquisition is the most widespread mode of external development for dealing with the changing environment of business (Jacob and Poitras, 2015). The main objective of a merger-acquisition is most often seeking for synergies. However, in order to achieve the objectives of the new entity, individuals must work together to create collective efficiency that adds value to the work they realize (Morin, 2015). Nevertheless, we find no studies in the scientific literature on how to promote effective inter-individual collaboration after a merger-acquisition.This PhD proposes a research model integrating the various determinants of collaboration and pays particular attention to the extent of the influence of trust and culture that play, according to the existing literature, an important role in the effectiveness of inter-individual collaboration. The results of a qualitative study, based on 44 interviews, and a quantitative study, based on 301 questionnaires, that are both realized at Air France-KLM, allow us to see that trust and culture have an important and indirect influence on the effectiveness of collaboration.Our study confirms firstly the importance of studying inter-individual collaboration by showing that its effectiveness determines 68% of the realization of the objectives of the organization. Secondly, we observe that trust is essential for good communication and strong social cohesion, which in turn account for 58% of the effectiveness of collaboration. Thus, we remark that interpersonal trust influences the effectiveness of collaboration indirectly. This is also the case for culture. Power distances in corporate culture and avoidance of uncertainty in national culture have a negative impact on trust and social cohesion. Since social cohesion and communication determine the effectiveness of collaboration, we could conclude that cultural aspects influence the effectiveness of collaboration indirectly
Irish, Jessica A. "Clash collaboration : multifaceted disparateness facilitating fractures and fusions in musical composition and improvisation." Thesis, 2021. http://hdl.handle.net/1959.7/uws:60934.
Full text