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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Fusion de données multi-capteurs pour l'habitat intelligent / Multi-sensors data fusion for smart home

Brulin, Damien 27 August 2010 (has links)
Le concept d’habitat intelligent s’est largement développé ces dernières années afin de proposer des solutions face à deux préoccupations majeures : la gestion optimisée de l’énergie dans le bâtiment et l’aide au maintien à domicile de personnes âgées. C’est dans ce contexte que le projet CAPTHOM, dans lequel s’inscrit cette thèse, a été développé. Pour répondre à ces problématiques, de nombreux capteurs, de natures différentes, sont utilisés pour la détection de la présence humaine, la détermination de la localisation et de la posture de la personne. En effet, aucun capteur, ne peut, seul, répondre à l’ensemble de ces informations justifiant le développement d’un dispositif multi-capteurs et d’une politique de fusion de données. Dans ce projet, les capteurs retenus sont les détecteurs infrarouges passifs, les thermopiles et la caméra. Aucun capteur n’est porté par la personne (non invasivité du dispositif). Nous proposons une architecture globale du capteur intelligent composée de quatre modules de fusion permettant respectivement de détecter la présence humaine, de localiser en 3D la personne, de déterminer la posture et d’aider à la prise de décision finale selon l’application visée. Le module de détection de présence fusionne les informations des trois capteurs : les détecteurs IRP pour la détection du mouvement, les thermopiles pour la présence en cas d’immobilité de la personne et la caméra pour identifier l’entité détectée. La localisation 3D de la personne est réalisée grâce à l’estimation de position sur horizon glissant. Cette méthode, nommée Visual Receding Horizon Estimation (VRHE), formule le problème d’estimation de position en un problème d’optimisation non linéaire sous contraintes dans le plan image. Le module de fusion pour la détermination de posture s’appuie sur la théorie des ensembles flous. Il assure la détermination de la posture indépendamment de la personne et de sa distance vis à vis de la caméra. Enfin, un module d’aide à la décision fusionne les sorties des différents modules et permet de déclencher des alarmes dans le cas de la surveillance de personnes âgées ou de déclencher des applications domotiques (chauffage, éclairage) pour la gestion énergétique de bâtiments. / The smart home concept has been widely developed in the last years in order to propose solutions for twomain concerns : optimized energy management in building and help for in-home support for elderly people.In this context, the CAPTHOM project, in which this thesis is in line with, has been developed. To respondto these problems, many sensors, of different natures, are used to detect the human presence, to determinethe position and the posture of the person. In fact, no sensor can , alone, answers to all information justifyingthe development of a multi-sensor system and a data fusion method. In this project, the selected sensorsare passive infrared sensors (PIR), thermopiles and a video camera. No sensor is carried by the person(non invasive system). We propose a global architecture of intelligent sensor made of four fusion modulesallowing respectively to detect the human presence, to locate in 3D the person, to determine the posture andto help to make a decision according to the application. The human presence module fuses information ofthe three sensors : PIR sensors for the movement, thermopiles for the presence in case of immobility and thecamera to identify the detected entity. The 3D localisation of the person is realized thanks to position recedinghorizon estimation. This method, called Visual Receding Horizon Estimation (VRHE), formulates the positionestimation problem into an nonlinear optimisation problem under constraints in the image plane. The fusionmodule for the posture determination is based on fuzzy logic. It insures the posture determination regardlessof the person and the distance from the camera. Finally, the module to make a decision fuses the outputs of the preceding modules and gives the opportunity to launch alarms (elderly people monitoring) or to commandhome automation devices (lightning, heating) for the energy management of buildings.
2

Extensions to the probabilistic multi-hypothesis tracker for improved data association / Samuel J. Davey/

Davey, Samuel Jarrod January 2003 (has links)
"September 2003" / Bibliography: leaves 209-216. / xxvi, 216 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / This thesis has introduced a number of enhancements to the PMHT algorithm, motivated by the Over the Horizon Radar tracking problem. The two primary enhancements are the incorporation of classification information, and the introduction of a discrete state model for the assignment prior probability. The modified PMHT algorithms achieved through these enhancements are referred to as PMHT-c and PMHT-y respectively. / Thesis (Ph.D.)--University of Adelaide, School of Electrical and Electronic Engineering, 2003
3

Over-the-horizon radar array calibration

Solomon, Ishan Samjeva Daniel. January 1998 (has links) (PDF)
Includes bibliographical references. Due to the rapid deployment of modern over-the-horizon radars, antenna/sensor position errors may be present and, since the antennas have a simple and cost-effective design, mutual coupling may also be present. These imperfections, which can degrade radar performance, form the basis of the investigation. Also calibrates the receiving array of the Jindalee over-the-horizon radar (located in Central Australia) using echoes from meteor trails.
4

Unraveling horizons

Wilson, Megan 29 September 2015 (has links)
The horizon is many things. It is our description of the unknown, the future, and the instigator of our imagination. The horizon is nowhere. It cannot be mapped, measured, or dissected, but it can be defined. A line denotes the horizon, separating us from those things that are mentally and physically out of our reach. The line represents more than that, and upon closer examination gives way to a nomadic encompassment of space. At any given time the horizon contains a multitude of objects, both living and not. Recognizing it’s limits and contents requires an understanding of both its spatial and temporal aspects, as well as of our own abilities to interpret and experience a space. This document explores the physical and mental search for an understanding of the horizon. It shifts, separates, and mirrors the unreachable distance of the horizon. Pulling in the spaces between the air and the landscape as it journals the search for a shifting end. / October 2015
5

Over-the-horizon radar array calibration /

Solomon, Ishan Samjeva Daniel. January 1998 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, 1998. / Includes bibliographical references.
6

Factors Affecting Mobility of Copper in Soil-Water Matrices

Al-Taher, Hossam 17 February 2001 (has links)
Copper is applied to many crops as a fungicide/bactericide, including plasticulture tomato growing operations. Field tests have shown that copper is sometimes found in ground water near these fields. Therefore, a laboratory study was undertaken to determine if this copper can result from plasticulture application and to determine the mechanisms that account for the movement through soil to the subsurface. From the factors that may affect this mobility process; TOC, dryness and its temperature cycle and water content of the soil were selected for study. These factors were investigated in both batch and continuous flow (column) processes. Copper mobility through soil columns was associated with TOC mobility, and soil drying had a major effect on both copper and TOC mobility. The concentration of copper eluted from columns containing dried soils was up to 20 times higher from those containing wet soils. The extent of dryness was found to affect mobility. First-flush-pattern for both copper and TOC from the columns was observed in all columns studies. In this research the copper mobility through the A- and B-horizon of Bojac sandy loam from the Eastern Shore of Virginia was studied. This study included both batch and column processes. The effects of pH, TOC and humic substances were investigated. The mobility of copper was found to be higher through A-horizon soil. The pH was found to have a considerable effect on the mobility of copper and TOC. The highest mobility of copper was achieved at pH 6.24 and its mobility through both soil horizons was associated with the mobility of TOC. A study of the humic substances indicated that fulvic acids had 4 times higher adsorption capacity for copper than humic acids. The association between fulvic acids and copper, coupled with the mobility of TOC and fulvic acids in the soil, accounted for transport of copper through soil columns. / Ph. D.
7

Extended horizon predictive control

Dong, Yang January 1992 (has links)
No description available.
8

Comparison of Sky View Factor Estimates using Digital Surface Models

Adhikari, Bikalpa 02 1900 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / Better comprehension of the Urban Heat Island study requires information on the natural as well as built characteristics of the environment at high spatial resolution. Sky View Factor (SVF) has been distinguished as a significant parameter for Local Climate Zone (LCZ) classification based on environmental characteristics that influence the urban climate at finer spatial scales. The purpose of this thesis was to evaluate currently available data sources and methods for deriving continuous SVF estimates. The specific objectives were to summarize the characteristics of currently available digital surface models (DSMs) of the study region and to compare the results of using these models to estimate SVF with three different raster-based algorithms: Horizon Search Algorithm in R-programming (Doninck, 2018), Relief Visualization Toolbox (RVT) (Žiga et al., 2016), and the Urban Multi-scale Environmental Predictor (UMEP) plugin in QGIS (Lindberg, et al., 2018).
9

Implied Boundaries

Lemons, Rye Daniel 02 February 2007 (has links)
Implied spatial boundaries are examined and evaluated at a camping shelter complex on an Eastern California lake. A grid of concrete columns house a series of suspended wooden boxes and a connecting ramp. / Master of Architecture
10

Entre fidélité et dissidence : revisiter la liberté chrétienne avec Fernand Dumont

Couture, Monique January 2013 (has links)
Ce mémoire a pour objectif d’explorer les conditions de possibilités pour une personne catholique de répondre à l’appel ecclésial tout en critiquant de façon constructive l’horizon institutionnel. Nous nous intéressons particulièrement au catholicisme culturel québécois du vingtième siècle à nos jours, tout en étant convaincus que notre sujet de recherche peut rejoindre toute personne contemporaine qui cherche une corrélation entre foi et loi. Pour atteindre cette visée, le questionnement est posé dans le contexte sociopolitique, religieux mondial et québécois, qui a mené l’Église et la société moderne en conflit de culture. Cette problématique de tension entre foi et loi a toujours existé, depuis le début du christianisme. À cet effet, plusieurs sources d’information ont été recueillies, telles des productions intellectuelles et scientifiques en sociologie, en histoire, en théologie et en psychologie. La méthodologie employée propose dans un premier temps une contextualisation pour faire mémoire afin de documenter, quoique bien partiellement, la vie sociale, politique et religieuse du siècle passé au Québec. Ensuite, la personne humaine est située dans ce monde en mutation. À cette fin, un schéma de l’être humain dans son milieu sera produit. Enfin, une réflexion sera entreprise avec l’apport théorique de Femand Dumont et sa théorie de la culture. Une analyse sera menée avec les questions suivantes: que signifie être un humain? Un être de culture? Aujourd'hui que signifie être un pèlerin? Comment demeurer fidèle à Jésus-Christ tout en critiquant l’horizon institutionnel? La démarche suggère le concept d’un savoir émigrer comme clé herméneutique. Cette notion est au coeur de l’oeuvre de Femand Dumont. Elle est susceptible d’apporter un éclairage pour tenter de résoudre, du moins partiellement, l’antinomie fidélité-liberté en dégageant des espaces de mutation. Le conflit dialectique est ainsi examiné sous l’angle des ruptures inévitables produites par la tension soutenue entre foi et loi. Finalement, nous espérons que notre travail désentravera la voie vers un dialogue fécond et porteur de neuf pour une société en marche.

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