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Rozprawy doktorskie na temat „Spatial systems”

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Data publikacji: 4 czerwca 2021
Data aktualizacji: 25 lipca 2025

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1

Davies, Jessica. "Expanding the spatial data infrastructure model to support spatial wireless applications /." Connect to thesis, 2003. http://eprints.unimelb.edu.au/archive/00001044.

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Jusoh, Shaidah. "Integrating stand-alone Web-based spatial information systems into integrated spatial information system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ33236.pdf.

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Sandhu, Raghbir Singh. "Intelligent spatial decision support systems." Thesis, University College London (University of London), 1998. http://discovery.ucl.ac.uk/1317911/.

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This thesis investigates the conceptual and methodological issues for the development of Intelligent Spatial Decision Support Systems (ISDSS). These are spatial decision support systems (SDSS) integrating intelligent systems techniques (Genetic Algorithms, Neural Networks, Expert Systems, Fuzzy Logic and Nonlinear methods) with traditional modelling and statistical methods for the analysis of spatial problems. The principal aim of this work is to verify the feasibility of heterogeneous systems for spatial decision support derived from a combination of traditional numerical techniques and intel
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4

El-Geresy, Baher. "Qualitative representation and reasoning for spatial and spatio-temporal systems." Thesis, University of South Wales, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403330.

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Alkhaldi, Rawan. "Spatial data transmission security authentication of spatial data using a new temporal taxonomy /." abstract and full text PDF (free order & download UNR users only), 2005. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1433280.

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Hope, Susannah Jayne. "Decision making under spatial uncertainty /." Connect to thesis, 2005. http://repository.unimelb.edu.au/10187/1150.

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Errors are inherent to all spatial datasets and give rise to a level of uncertainty in the final product of a geographic information system (GIS). There is growing recognition that the uncertainty associated with spatial information should be represented to users in a comprehensive and unambiguous way. However, the effects on decision-making of such representations have not been thoroughly investigated. Studies from the psychological literature indicate decision-making biases when information is uncertain. This study explores the effects of representing spatial uncertainty, through an examinat
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Vlado, Veldic. "GIS for spatial decision-making." Diss., University of Pretoria, 2001. http://hdl.handle.net/2263/29747.

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Hu, Haibo. "Spatial and continuous spatial queries on smart mobile clients /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?COMP%202005%20HU.

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9

Drawert, Brian J. "Spatial Stochastic Simulation of Biochemical Systems." Thesis, University of California, Santa Barbara, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3559784.

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<p> Recent advances in biology have shown that proteins and genes often interact probabilistically. The resulting effects that arise from these stochastic dynamics differ significantly than traditional deterministic formulations, and have biologically significant ramifications. This has led to the development of computational models of the discrete stochastic biochemical pathways found in living organisms. These include spatial stochastic models, where the physical extent of the domain plays an important role; analogous to traditional partial differential equations. </p><p> Simulation of spa
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10

Fischer, Manfred M., and Peter Nijkamp. "Geographic Information Systems and Spatial Analysis." WU Vienna University of Economics and Business, 1991. http://epub.wu.ac.at/4219/1/WSG_DP_1491.pdf.

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11

Smith, Mark. "Spatial reaction systems on parallel supercomputers." Thesis, University of Edinburgh, 1994. http://hdl.handle.net/1842/12985.

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A wide variety of physical, chemical and biological systems can be represented as a collection of discrete spatial locations within which some interaction proceeds, and between which reactants diffuse or migrate. Many such real-world spatial reaction systems are known to be both non-linear and stochastic in nature, and thus studies of these systems have generally relied upon analytic approximation and computer simulation. However, this later approach can become impractical for large, complex systems which require massive computational resources. In this work we analyse a general spatial reacti
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12

Holzmann, Clemens. "Spatial awareness of autonomous embedded systems." Wiesbaden Vieweg + Teubner, 2008. http://d-nb.info/992304865/04.

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13

Astély, David. "Spatial and spatio-temporal processing with antenna arrays in wireless systems /." Stockholm, 1999. http://www.lib.kth.se/abs99/aste0601.pdf.

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14

Vlado, Veldic. "GIS for spatial decision-making." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-11242005-101724/.

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15

Fischer, Manfred M., and Henk J. Scholten. "Geographic Information Systems, Spatial Data Analysis and Spatial Modelling. - Problems and Possibilities -." WU Vienna University of Economics and Business, 1994. http://epub.wu.ac.at/4194/1/WSG_DP_3794.pdf.

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This article is the position paper for the ESF-GISDATA Specialist Meeting on GIS & Spatial Analysis, Amsterdam, 1-5December1993. The focus here is on the two major themes of the meeting: Spatial Data Analysis and Spatial Modelling. Special emphasis is laid on specific problems and possibilities for interfacing spatial analysis tools (i.e. spatial data analysis techniques and spatial models) and GIS. Both GIS application fields, the environmental sciences and the social sciences, are taken into consideration. (authors' abstract)<br>Series: Discussion Papers of the Institute for Economic G
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16

Oh, Inhee Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Spatial reuse in TDMA wireless networks." Publisher:University of New South Wales. Electrical Engineering & Telecommunications, 2008. http://handle.unsw.edu.au/1959.4/40910.

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In this thesis we investigate the performance of spatial reuse in wireless networks. More specifically, we investigate the performance of location-based spatial reuse built upon the identification of links in the network that form Collision-Free Sets (CFSs). We develop algorithms that efficiently find such CFSs. The main focus of this thesis is the application of our CFS-based algorithms to emerging WiMAX (Worldwide Interoperability for Microwave Access) networks. However, we will also apply our CFS-based algorithms to smaller scale networks, as well as to the issue of QoS routing. This thesis
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17

Williams, Mark, and n/a. "Spatial data from image sequences." University of Otago. Department of Computer Science, 2007. http://adt.otago.ac.nz./public/adt-NZDU20080130.131733.

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There are many existing methods for capturing three dimensional data from two dimensional images. Methods based on images captured from multiple view-points require solving the correspondence problem: establishing which points in each image represent the same points in the scene. Most attempts at solving the correspondence problem require carefully controlled lighting and reference points within the scene. A new method captures many consecutive images to form a dense spatiotemporal volume as the camera-or scene-undergoes controlled motion. Feature points in the scene move along predictable p
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18

García, Ordoñez Luis. "Perfomance limits of spatial multiplexing mimo systems." Doctoral thesis, Universitat Politècnica de Catalunya, 2009. http://hdl.handle.net/10803/22735.

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Los canales multiple-input multiple-output (MIMO) proporcionan una forma abstracta y general de modelar un gran número de sistemas de comunicaciones. Los canales MIMO inalámbricos, en concreto, han despertado un gran interés en la comunidad investigadora durante la última década, puesto que aportan mejoras significativas en términos de eficiencia espectral y fiabilidad frente a los sistemas single-input single-output (SISO) tradicionales. Esta tesis se concentra en sistemas MIMO de multiplexado espacial con conocimiento perfecto de canal (CSI) en ambos lados del enlace de comunicaciones. Las
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Rodríguez, Amor Daniel. "Population and evolutionary dynamics in spatial systems." Doctoral thesis, Universitat de Girona, 2013. http://hdl.handle.net/10803/128501.

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Physical and mathematical models are extremely useful to understand key processes in population and evolutionary dynamics. Such models allow the study of many diverse features in spatial systems such as front propagation, the evolution of the population number density, interactions between species (or individuals), the evolution of strategies, etc. This thesis is devoted to several physical models describing spatial systems. The first model focuses on the effects of the population structure in two-dimensional invasive fronts. An expression for the front speed is derived from the equations for
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20

Oukbir, Karim. "Indiscernibility and Vagueness in Spatial Information Systems." Doctoral thesis, KTH, Numerical Analysis and Computer Science, NADA, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3634.

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<p>We investigate the use of the concept of indiscernibilityand vagueness in spatial information systems. To representindiscernibility and vagueness we use rough sets, respectivelyfuzzy sets. We introduce a theoretical model to supportapproximate queries in information systems and we show howthose queries can be used to perform uncertain classi.cations.We also explore how to assess quality of uncertainclassi.cations and ways to compare those classi.cations to eachother in order to assess accuracies. We implement the querylanguage in an SQL relational language to demonstrate thefeasibility of a
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21

Briggs, Jonathan Francis. "Particle filters for high dimensional spatial systems." Thesis, University of Auckland, 2011. http://hdl.handle.net/2292/7659.

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The objective of this work is to develop new filtering methodologies that allow state-space models to be applied to high dimensional spatial systems with fewer and less restrictive assumptions than the currently practical methods. Reducing the assumptions increases the range of systems that the state-space framework can be applied to and therefore the range of systems for which the uncertainty in estimates can be quantified and statements about the risk of particular outcomes made. The particle filter was developed to meet this objective because restrictive assumptions are fundamental t
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22

Fukuzono, Hayato. "Spatial Signal Processing on Distributed MIMO Systems." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/217206.

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Huang, Wenzong. "Spatial queueing systems and reversible markov processes." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/24871.

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Hirst, J. M. "Spatial impression in multichannel surround sound systems." Thesis, University of Salford, 2006. http://usir.salford.ac.uk/2226/.

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Spatial impression in both concert halls and reproduced sound has been identified as an important attribute of the listening experience. In this study, the synthesis and objective measurement of spatial impression in reproduced sound is examined. A novel, multichannel spatializing technique for musical synthesis has been developed that entailed the separation of the individual harmonics of a musical note that were spatially distributed over multichannel surround systems. Subjective testing of the techniques revealed that the perceived degree of spatial impression significantly increased as the
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25

White, Andrew. "Temporal and spatial dynamics of ecological systems." Thesis, University of Liverpool, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338459.

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BRAZ, JOAO ALFREDO CAL. "SIGNAL DETECTION IN SPATIAL MODULATION MULTIANTENNA SYSTEMS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2015. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=26134@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>Modulação Espacial é um método de transmissão por múltiplas antenas recentemente proposto,designado por MIMO-SIM, que associa informação à escola das antenas transmissoras. Isto possibilita a redução do número de cadeias de radiofrequência e, consequentemente, a imimplementação de sistemas de comunicação que consomem menos energia. O novo esquema de comunicação dos sistemas MIMO-SIM exige que, do lado redeptor, novas e eficientes estratégias
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Guzmán, Michell. "On the expressiveness of spatial constraint systems." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX064/document.

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Les comportement épistémiques, mobiles et spatiaux sont omniprésent dans les systèmes distribués aujourd’hui. La nature intrinsèque épistémique de ces types de systèmes provient des interactions des éleménts qui en font parties. La plupart des gens sont familiarisés avec des systèmes numériques où les utilisateurs peuvent partager ses croyances, opinions et même des mensonges intentionnels (des canulars). Aussi, les modèles de ces systèmes doivent tenir compte des interactions avec d’autres de même que leur nature distribués. Ces comportements spatiaux et mobiles font part d’applications où le
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Lopes, Batres Mario. "Integrating Spatial Audio in Voice Guidance Systems." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-289640.

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Navigation systems are commonly used in our daily lives. Research has shown that spatial audio presents one opportunity for more effectively communicating to the driver the direction of the next manoeuvre. This thesis project proposes a new feature for the spatialisation of the audio cues triggered by a mobile navigation system by using a virtualised vector-based panning (VVBP) architecture for the encoding and decoding. The prototype developed during this thesis enables the spatialisation using headphones- or speakers- based systems. This study aims to promote a new sound experience to the us
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Flanagan, Rachel Erin. "Two Autonomous Spatial Systems and Their Juxtaposition." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/79429.

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This thesis explores the idea of two autonomous spatial systems and their interaction: a syntactic grid and a pure formal volume. The juxtaposition of these two elements allows for insight into and exploration of their autonomous ordering potentialities, as well as the potential relationships or the presence of both systems. The syntactic grid articulates structure and strength for the architectural project , while the pure volume translates the programmatic function and their distinction from the grid.<br>Master of Architecture
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Chen, Chih-Keng. "Nonholonomic control of coupled spatial multibody systems." Case Western Reserve University School of Graduate Studies / OhioLINK, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=case1057091907.

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Yang, Shuang. "Multidimensional microfluidic bioseparation systems with spatial multiplexing." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8725.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2008.<br>Thesis research directed by: Dept. of Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Ma, Jingsheng. "Integrating GIS and spatial statistical tools for the spatial analysis of health-related data." Thesis, University of Sheffield, 2001. http://etheses.whiterose.ac.uk/14818/.

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Spatial Statistical Analysis (SSA) and Geographical Information Systems (GIS) are instrumental in many areas of geographical study. However, their use tends to be separate one from another. This has prevented their potential in many application areas from being realised. This research is an attempt to bring the two technologies together for a specific application area - health research. There are two research objectives. The first and main objective is to construct a software package - SAGE - by integrating necessary SSA techniques with ARC/INFO, a GIS, to enable the user to undertake a cohere
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Nedas, Konstantinos A. "Semantic Similarity of Spatial Scenes." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/NedasKA2006.pdf.

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Pennington, Sandra Lynn. "Automatic geometric modeling of spatial mechanism links." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/91056.

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This thesis introduces GENMOD, a collection of subroutines which allow automatic geometric modeling of 3-D models for spatial links or linkages given a minimum amount of information as input. The subroutines utilize the CADCD (CADAM, Inc.) geometry interface software to enter 3-D data directly into the CAD/CAM database. Wire-frame and surface models are produced. Input is accepted from user created files with a standardized format allowing the GENMOD subroutines to be implemented regardless of the synthesis and analysis routines used. The realistic visualization of a mechanism during the synth
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McKnight, Douglas J. "An electronically addressed spatial light modulator." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/281.

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Coherent optical data processing is recognised to be a natural solution to certain information processing problems. Attempts to exploit the benefits of optical processing are limited by the quality of available Spatial Light Modulators. Spatial Light Modulators are devices which controllably impress information onto the amplitude or phase of an optical wavefront. They are used both to input data into an opticaI system and as modulating elements within the system (often in the Fourier plane of a Fourier transform processor). This thesis describes the successful development of an electronically
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Williams, Richard David. "Organisation and analysis of spatial data." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304464.

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Mendez, Chaves Diego. "A Framework for Participatory Sensing Systems." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4135.

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Participatory sensing (PS) systems are a new emerging sensing paradigm based on the participation of cellular users in a cooperative way. Due to the spatio-temporal granularity that a PS system can provide, it is now possible to detect and analyze events that occur at different scales, at a low cost. While PS systems present interesting characteristics, they also create new problems. Since the measuring devices are cheaper and they are in the hands of the users, PS systems face several design challenges related to the poor accuracy and high failure rate of the sensors, the possibility of malic
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Kudo, Riichi. "Efficient Spatial Resource Management for Broadband MIMO Systems." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/126783.

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Bäckström, Anna, and Louise Wändin. "Spatial Hypertext Editing Tools for Wiki Web Systems." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-97795.

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This thesis considers the provision of comprehensible and interpretable tools in the wiki web system. This implies that an extensive research has been made upon the system, i.e., a hypertext system at the Spatial Information Architecture Laboratory (SIAL) at RMIT University in Australia. The process to develop these tools is based on certain requirements due to the user. The wiki web system is becoming more and more common in communities, projects, education etc. Companies provide wiki systems to share project information as an online collaborative tool. Another way of using a wiki is as an en
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40

Wu, Xiping. "Wireless communication systems based on spatial modulation MIMO." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/10505.

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Spatial modulation (SM) is a unique single-stream, multiple-input multiple-output (MIMO) transmission technique. Unlike traditional MIMO schemes, SM sends out signals through a single active antenna, and achieves multiplexing gains by encoding information bits into the index of the currently active antenna. In contrast to multi-stream MIMO systems, this particular characteristic offers great superiority in two main aspects. Firstly, SM completely avoids inter-channel interference. Secondly, SM requires a single radio-frequency chain, regardless of the number of antennas used, and therefore exh
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LISITANO, DOMENICO. "Spatial damping identification and control of mechanical systems." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2734827.

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42

Dakowicz, Maciej. "A unified spatial data structure for GIS." Thesis, University of South Wales, 2009. https://pure.southwales.ac.uk/en/studentthesis/a-unified-spatial-data-structure-for-gis(1e1d3b0e-586a-4b1d-9027-f03c61b30a68).html.

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Most GIS systems use separate thematic "layers" to store different types of spatial data. Each of them contains specific characteristics of the area, so there are separate layers for the distribution of buildings, the road network or the relief of the terrain. The spatial information used in GIS can be grouped into four main groups: polygonal maps, terrain models, networks and discrete, unconnected objects. Polygonal maps and terrain models are considered to be "field" models of space, covering the whole map, so there is some kind of information available at every location. On the other hand,
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Yü, Ying-siu. "Spatial pattern of unemployment in Hong Kong." [Hong Kong : University of Hong Kong], 1986. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12333682.

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Monteiro, Francisco António Taveira Branco Nunes. "Lattices in MIMO spatial multiplexing : detection and geometry." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610576.

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Wealands, Stephen Russell. "Quantitative methods for hydrological spatial field comparison /." Connect to thesis, 2006. http://eprints.unimelb.edu.au/archive/00002722.

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Grubesic, Tony H. "A spatial analysis of internal accessibility." Connect to this title online, 2001. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu997995873.

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Thesis (Ph. D.)--Ohio State University, 2001.<br>Title from first page of PDF file. Document formatted into pages; contains xiv, 234 p.; also contains graphics (some col.). Includes abstract and vita. Advisor: Morton E. O'Kelly, Dept. of Geography. Includes bibliographical references (p. 225-234).
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47

Ware, John Mark. "Multi-scale data storage schemes for spatial information systems." Thesis, University of South Wales, 1994. https://pure.southwales.ac.uk/en/studentthesis/multiscale-data-storage-schemes-for-spatial-information-systems(38746248-a8d7-4527-ab7a-e874140eda07).html.

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This thesis documents a research project that has led to the design and prototype implementation of several data storage schemes suited to the efficient multi-scale representation of integrated spatial data. Spatial information systems will benefit from having data models which allow for data to be viewed and analysed at various levels of detail, while the integration of data from different sources will lead to a more accurate representation of reality. The work has addressed two specific problems. The first concerns the design of an integrated multi-scale data model suited for use within Geog
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48

Yang, Zhao. "Spatial Data Mining Analytical Environment for Large Scale Geospatial Data." ScholarWorks@UNO, 2016. http://scholarworks.uno.edu/td/2284.

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Nowadays, many applications are continuously generating large-scale geospatial data. Vehicle GPS tracking data, aerial surveillance drones, LiDAR (Light Detection and Ranging), world-wide spatial networks, and high resolution optical or Synthetic Aperture Radar imagery data all generate a huge amount of geospatial data. However, as data collection increases our ability to process this large-scale geospatial data in a flexible fashion is still limited. We propose a framework for processing and analyzing large-scale geospatial and environmental data using a “Big Data” infrastructure. Existing Bi
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Alani, Harith. "Spatial and thematic ontology in cultural heritage information systems." Thesis, University of South Wales, 2001. https://pure.southwales.ac.uk/en/studentthesis/spatial-and-thematic-ontology-in-cultural-heritage-information-systems(445b4484-9979-4653-a895-555432b789d7).html.

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This project investigated the design and implementation of a knowledge-based system for thematic and spatial access to information about archaeological artefacts. The project explored the use of an integrated spatial and thematic ontology to address many problems related to the search and retrieval of archaeological information. One common problem is the frequent mismatch between the terminology employed by users to access the information, and that used by developers to index it. Systems may lack the capability to process queries with loose information demand, since they are unable to imprecis
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Holter, Bengt. "Adaptive coded modulation in spatial and multiuser diversity systems." Doctoral thesis, Norwegian University of Science and Technology, Department of Electronics and Telecommunications, 2005. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1724.

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<p>This thesis consists of five included papers plus an introduction. The majority of the papers are devoted to performance analysis of an adaptive coded modulation (ACM) scheme based on multidimensional trellis codes. Primarily, single-user systems exploiting spatial diversity are analysed, but results are also presented for a multiuser system exploiting multiuser diversity.</p><p>The performance of the ACMscheme is evaluated for slowly flat-fading channels. When spatial diversity is exploited at the receiver end only, the analysis is focused on two different combining techniques: <i>maximum
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