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Dissertations / Theses on the topic 'Spatial structure of stands'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Zeller, Laura Isabel [Verfasser], Hans [Akademischer Betreuer] Pretzsch, Thomas [Gutachter] Knoke, and Hans [Gutachter] Pretzsch. "Interactions between forest stand structure, tree species composition, and stand productivity in spatial, temporal, and silvicultural context / Laura Isabel Zeller ; Gutachter: Thomas Knoke, Hans Pretzsch ; Betreuer: Hans Pretzsch." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1214808549/34.

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2

Robertson, Suzanne Lora. "Spatial Patterns in Stage-Structured Populations with Density Dependent Dispersal." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/194472.

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Spatial segregation among life cycle stages has been observed in many stage-structured species, including species of the flour beetle Tribolium. Patterns have been observed both in homogeneous and heterogeneous environments. We investigate density dependent dispersal of life cycle stages as a mechanism responsible for this separation. By means of mathematical analysis and numerical simulations, we explore this hypothesis using stage-structured, integrodifference equation (IDE) models that incorporate density dependent dispersal kernels.In Chapter 2 we develop a bifurcation theory approach t

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3

Coulston, John Wesley. "SIMULATING FOREST STANDS BY RESAMPLING ONE-ACRE STEM MAPS: SPATIAL CHARACTERISTICS OF RESULTS." NCSU, 1999. http://www.lib.ncsu.edu/theses/available/etd-19990323-181716.

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<p> The purpose of this research is to generate forest stands for sampling simulations on anoperational level. In this research, a simulated forest stand consists of x and y coordinates ofstems and their attributes. One-acre stem maps are mapped stem locations and attributes from thefield. The simulation procedure is a two step process. The first step is to create discrete samplesfrom a one-acre stem map. Secondly, the discrete samples are selected randomly withreplacement and placed adjacently until a simulated forest stand of desired size and shape is built. The simulated forest stands are t

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4

Sacamano, Paul 1962. "Structure and function of two urban forest stands in Tucson, Arizona." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/277924.

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The purpose of this study was to describe the structures of an arid urban forest. Two distinct and adjacent residential neighborhoods in Tucson, Arizona, Winterhaven and Richland Heights, were chosen as the study site. Landcover classes were identified through aerial photointerpretation and digitized using AutoCad. A field inventory gathered vegetative measures. Through an analysis, species composition, horizontal and vertical structure were described. Results were compared between each neighborhood stand and among findings of previous structural studies. Results describe Winterhaven as an une

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5

Sarzynska, Marta. "Spatial community structure and epidemics." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:fd841775-0fdb-4c95-a1a8-01065ada1838.

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Networks are a useful quantitative representation for complex systems of interacting entities arising in fields such as biological, physical and social sciences. A network representation provides a degree of simplification while capturing key connectivity patterns. This thesis focuses on two main themes: the study of community structure, an important mesoscopic feature of many networks, and its application to study spatiotemporal spread of infectious diseases. Community detection seeks to partition a network into dense sets of nodes that are connected sparsely to other dense sets. The notion o

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6

Karlsson, Kjell. "Growth allocation and stand structure in Norway spruce stands : expected taper and diameter distribution in stands subjected to different thinning regimes /." Uppsala : Dept. of Bioenergy, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200575.pdf.

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7

Hamel, Cary. "Structure and dynamics of boreal forest stands in the Duck Mountains, Manitoba." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ62746.pdf.

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8

Kershaw, John A. "Crown structure and stem form development in young stands of western hemlock /." Thesis, Connect to this title online; UW restricted, 1993. http://hdl.handle.net/1773/5523.

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9

Yeung, Tony. "Storing Protein Structure in Spatial Database." Digital Archive @ GSU, 2005. http://digitalarchive.gsu.edu/cs_theses/8.

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In recent years, the field of bioinformatics has exploded in a scale that is unprecedented. The amount of data generated from different genome projects demands a new and efficient way of information storage and retrieval. The analysis and management of the protein structure information has become one of the main focuses. It is well-known that a protein’s functions differ depending on its structure’s position in 3-dimensional space. Due to the fact that protein structures are exceedingly large, complex, and multi-dimensional, there is a need for a data model that can fulfill the requirements of

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10

Dorling, Daniel. "The visualisation of spatial social structure." Thesis, University of Newcastle Upon Tyne, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314753.

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11

Reifenstein, Edward C. (Edward Conrad). "Understanding spatial structure : identification, transformation, evaluation." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/69295.

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Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 1992.<br>Includes bibliographical references (p. 102-103).<br>This thesis outlines a process of observation and transformation using formalized concepts about space, territory, and position as well as transfonnational rules implicit in these concepts. A set of references is analyzed and explained using a common graphical language which serves to locate the references within a continuum of spatial configurations. Transformational rules are developed which allow for the generation of new configurations. Some proposa

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12

Whitney, Karen. "Spatial structure affects landscape ecology function." [Florida] : State University System of Florida, 1999. http://etd.fcla.edu/etd/uf/1999/amp7637/whitney.pdf.

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Thesis (M.S.)--University of Florida, 1999.<br>Title from first page of PDF file. Document formatted into pages; contains viii, 35 p.; also contains graphics. Vita. Includes bibliographical references (p. 27-34).

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13

Vokoun, Melinda M. "Investigating the Cooperative Behavior of Nonindustrial Private Forest Landowners when Stands are Spatially Interdependent." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/26556.

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This research examines how the harvesting behavior of nonindustrial private forest landowners, and their use of forestland for non-timber amenities, is affected by adjacent landowner behavior. The uncertainty an individual landowner has regarding adjacent landownersâ preferences, and how the production of non-timber amenities on their own stands relies on the condition of adjacent stocks, is specifically addressed. Economic characterizations of substitutes and complements are employed to investigate the differences in optimal stock levels at the steady state in the production of amenities

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14

Bullock, Bronson P. "Diameter Distributions of Juvenile Stands of Loblolly Pine (Pinus taeda L.) with Different Planting Densities." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/26412.

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Diameter distributions of juvenile loblolly pine (Pinus taeda L.) with different planting densities were characterized utilizing a two-parameter Weibull distribution. Trend analysis was employed to describe the effects of planting density, age, relative spacing, and rectangularity on the estimated diameter distributions for juvenile loblolly pine. A reparameterization of the two-parameter Weibull distribution was sought to reduce the dispersion of the estimated shape parameter. Methods that quantify the amount of inter-tree spatial dependency in a particular stand were applied. Empirical semi

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15

Waskiewicz, Justin. "Influence of Neighborhood Structure on Growth in Northern Red Oak - Eastern White Pine Stands." Fogler Library, University of Maine, 2011. http://www.library.umaine.edu/theses/pdf/WaskiewiczJ2011.pdf.

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16

Klinka, Karel. "Structure and regeneration of old-growth stands in the engelmann spruce - subalpine fir zone." Forest Sciences Department, University of British Columbia, 1998. http://hdl.handle.net/2429/661.

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Old-growth stands are important for management, conservation, wildlife, recreation, and maintaining biological diversity in forested landscapes. However, we are lacking the information needed to adequately identify and characterize old-growth stands. This is especially true for high elevation, interior forests. The characterization of stand structure and regeneration pattern will help in the development of site-specific guidelines for identifying old growth stands and restoring some of the old-growth characteristics in managed stands. This pamphlet presents a synopsis of a study inve

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17

Esmer, Ozcan. "Information Theory, Entropy And Urban Spatial Structure." Phd thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606319/index.pdf.

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Urban planning has witnessed the profound changes in the methodologies of modelling during the last 50 years. Spatial interaction models have passed from social physics, statistical mechanics to non-spatial and spatial information processing stages of progress that can be designated as paradigm shifts. This thesis traces the Maximum Entropy (MaxEnt) approach in urban planning as pioneered by Wilson (1967,1970) and Spatial Entropy concept by Batty (1974) based on the Information Theory and its developments by Shannon (1948), Jaynes (1957), Kullback (1959) and by Tribus (1962,1969). Information-

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18

Osnas, Erik E. "Temporal and spatial structure of waterfowl communities." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ30815.pdf.

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19

Xie, Enhai. "Spatial data structure indexing for video databases." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0023/MQ62164.pdf.

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20

Xie, Enhai. "Spatial data structure indexing for video databases." Thesis, University of New Brunswick, 1999. http://hdl.handle.net/1882/298.

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21

Turner, G. Matthew. "A spatial structure for an Atlanta urbanism." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/21703.

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22

Hernández-Alonso, Diana Anabel. "Modelling the spatial structure of image surrounds." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85556.

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In this thesis, the statistical nature of surround or context and the relationship between a scene feature and its interaction with its environment are studied. In particular we look at the conditional distribution of surround pixel values given the center pixel value. We then examine the physical mechanisms (ecological effects) by which the surround pixel values are generated to explain the form of the conditional distributions observed in the natural images.<br>A new statistical model is proposed for the spatial structure of the surround using principal component analysis (PCA). To th

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23

Purves, Drew William. "Local spatial structure and plant population dynamics." Thesis, University of York, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251813.

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24

Xu, Meng S. M. Massachusetts Institute of Technology. "Changing spatial structure of major Chinese cities." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/101318.

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Thesis: S.M. in Real Estate Development, Massachusetts Institute of Technology, Program in Real Estate Development in conjunction with the Center for Real Estate, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 47).<br>This paper examines the spatial structures of commercial real estate buildings (Offices, Retails) in four Chinese cities: Beijing, Shanghai, Shenzhen, and Guangzhou. In contrast to previous studies, this paper focused on the changes of the spatial pattern by involving the time variables to categorize the buildings into 3 time periods (

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25

Amaral, Pedro Vasconcelos Maia Do. "Spatial structure of health equipment in Brazil." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608168.

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26

Armstrong, Beth Diane. "Hippocampus: seahorse; brain-structure; spatial map; concept." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1002224.

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Through an exploration of both sculptural and thought processes undertaken in making my Masters exhibition, ‘Hippocampus’, I unpack some possibilities, instabilities, and limitations inherent in representation and visual perception. This thesis explores the Hippocampus as image (seahorse) and concept (brain-structure involved in cognitive mapping of space). Looking at Gilles Deleuze’s writings on representation, I will expand on the notion of the map as being that which does not define and fix a structure or meaning, but rather is open, extendable and experimental. I explore the becoming, rath

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27

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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28

Fina, Mark H. "Urban Spatial Structure and Household Travel Time." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/11272.

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The sprawl of U.S. cities has attracted criticism from many sources in recent years. Among the greatest of the cited harms of sprawl is the alleged travel time burden that it imposes on its residents. Previous research has tested the relationship between the sprawl of business activity and travel times by examining only its effects on commuting times and has concluded that people do not choosing housing and work locations to minimize commutes. This research takes a more comprehensive approach by analyzing the relationship between household travel times and sprawl by testing the relationship

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29

Bajtala, Mark J. "Spatial patterns of duff consumption in black spruce and jack pine stands in the boreal mixed wood forest." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ43136.pdf.

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30

O'Hara, Kevin L. "Thinning even-aged Douglas-fir stands : effects of density and structure on stand volume growth /." Thesis, Connect to this title online; UW restricted, 1987. http://hdl.handle.net/1773/5522.

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31

Jhit-E-Mon, Kanogwan. "Structures spatiales dans le roman des XIIe et XIIIe siècles. Intérieur - Extérieur." Thesis, Paris 4, 2009. http://www.theses.fr/2009PA040274.

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Dans les récits médiévaux, la réalité littéraire du décor est avant tout l'expérience imaginaire qu'introduit l'acte de lecture, avant d'être instrument qui permet au lecteur de réaliser l'image. Dans notre étude, il nous importe de préciser les éléments descriptifs, naturels et architecturaux, ou les visions du décor servant de cadres aux romans médiévaux. Avec une grande économie de moyens, la langue médiévale dit tout sur le sujet. En effet le stéréotype fonctionne toujours parfaitement, mais nous avons aussi de belles, brèves – mais énergiques – descriptions de châteaux et de villes. Les é

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32

Owens, Eli Thomas. "Investigating Granular Structure with Spatial and Temporal Methods." Thesis, North Carolina State University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3538538.

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<p> This dissertation reports studies of the internal structure of jammed granular materials and how granular sound propagation and vibrational modes are influenced by disorder in particle positions and contact forces. We investigate the role of particle scale forces on sound amplitude and speed, how to characterize the bulk pressure via the density of states, and force network modularity. We perform our experiments on a vertical, 2D, photoelastic granular material. Acoustic waves are excited from the bottom of the system and observed via particle scale sensors and a high speed camera. This no

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33

Chung, Tonny, and 鍾錦棠. "The evolution of spatial structure in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31258839.

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34

Lin, Han-Liang. "A cluster approach to detecting urban spatial structure." Thesis, University of Leeds, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270871.

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35

Cheshire, J. A. "Population structure and the spatial analysis of surnames." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1324522/.

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Geographers have largely overlooked surnames (family names), and their geographic concentrations, as a valuable source of data to indicate the spatial structure of populations. This thesis seeks to provide a substantive contribution to the geographical literature by demonstrating how quantitative spatial analysis of surname data can be used as an aid to understanding population structure at a range of scales from the regional to the continental. The primary purpose of this research is not to develop detailed case studies or to investigate specific examples of population characteristics conside

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36

Kendall, Bruce Edward. "Spatial structure and transient periodicity in biological dynamics." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/187496.

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Structure, in its many forms, is a central theme in theoretical population ecology. At a mathematical level, it arises as nonuniformities in the topology of nonlinear dynamical systems. I investigate a mechanism wherein a chaotic time series can have episodes of nearly periodic dynamics interspersed with more 'typical' irregular dynamics. This phenomenon frequently appears in biological models, and may explain patterns of alternating biennial and irregular dynamics in measles epidemics. I investigate the interaction between spatial structure and density-dependent population regulation with a s

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37

Gomes, Fernandes Rafael. "Spatial evolution of fractal-generated turbulent flow structure." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24761.

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This thesis presents a study on turbulence generated by space-filling fractal square grids using Particle Image Velocimetry (PIV) as the experimental technique in a water tunnel. The main focus of the present work is on the turbulent structure of the velocity gradient tensor. The need for such a study arises due to the discovery of a new scaling for the turbulent energy dissipation related, though not exclusively, to flows generated by such grids. At the centreline, turbulence generated by space-filling fractal square grids is composed by a production region, where turbulence intensity increas

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38

Penington, Sarah. "Branching processes with spatial structure in population models." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:361e5c58-e6dd-47a0-9a52-303e897547e8.

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We consider three different settings for branching processes with spatial structure which appear in population models. Firstly, we consider the effect of adding a competitive interaction between nearby individuals in a branching Brownian motion. Each individual has a mass which decays when other individuals are nearby. We study the front location: the location at which the local mass density drops to o(1). We show that there are arbitrarily large times t at which the front location is order of t^(1/3) behind the maximum displacement of a particle from the origin. Secondly, we study the strengt

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39

Hui, Zi. "Spatial structure of complex network and diffusion dynamics." Thesis, Le Mans, 2013. http://www.theses.fr/2013LEMA1005/document.

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Dans le développement récent des sciences de réseau, réseaux contraints spatiales sont devenues un objet d'une enquête approfondie. Spatiales des réseaux de contraintes sont intégrées dans l'espace de configuration. Leurs structures et les dynamiques sont influencées par la distance spatiale. Ceci est prouvé par les données empiriques de plus en plus sur des systèmes réels montrant des lois exponentielles ou de distribution d'énergie distance spatiale de liens. Dans cette thèse, nous nous concentrons sur la structure de réseau spatial avec une distribution en loi de puissance spatiale. Plusieu

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Chung, Tonny. "The evolution of spatial structure in Hong Kong /." Hong Kong : University of Hong Kong, 1995. http://sunzi.lib.hku.hk/hkuto/record.jsp?B14803549.

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41

Zhang, Mi. "Study of Spatial Structure of Squeezed Vacuum Field." W&M ScholarWorks, 2016. https://scholarworks.wm.edu/etd/1499450043.

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Squeezed states of light, with field fluctuations smaller than the coherent state fluctuations (or shot noise), are used for improving accuracy of quantum-noise limited measurements, like the detection of gravitational waves. They are also essential resources for quantum information transfer protocols. We studied a squeezed vacuum field generated in hot Rb vapor via the polarization self-rotation effect. We studied the mode structure of the squeezed field by spatially-masking the laser beam after its interaction with the Rb atomic vapor. From analysis of the data we developed a multi-mode theo

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42

Menzel, Michael A. "An examination of factors influencing the spatial distribution for foraging bats in pine stands in the southeastern United States." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=3047.

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Thesis (Ph. D.)--West Virginia University, 2003.<br>Title from document title page. Document formatted into pages; contains xix, 317 p. : ill. (some col.), maps (some col.). Includes abstract. Includes bibliographical references.

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43

Cook, Kathryn B. "Epipelagic zooplankton community structure : spatial patterns in abundance, species composition and size structure." Thesis, Swansea University, 2001. https://cronfa.swan.ac.uk/Record/cronfa42911.

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44

Klinka, Karel, Pal Varga, Louise E. M. de Montigny, and Christine Chourmouzis. "The structure of single- and mixed-species, second-growth stands of Western hemlock and Western redcedar." Forest Sciences Department, University of British Columbia, 2001. http://hdl.handle.net/2429/708.

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The structure of a forest stand is characterized by: (a) species composition, (b) age, (c) size (diameter and height), and (d) spatial (horizontal and vertical) arrangement of the trees. Depending on the species, site, and disturbance history, the stand structure varies with time, thus providing a snapshot of a particular development stage. Research on growth and stand structure has shown that the spatial distribution of trees is one of the key determinants of stand productivity. Forest inventories and ecological surveys carried out in British Columbia (BC) have shown that the structure o

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45

Avendaño, Arosemena José. "Three essays on urban spatial structure in Bogota D.C." Doctoral thesis, Universitat Autònoma de Barcelona, 2013. http://hdl.handle.net/10803/117436.

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Las ciudades son sistemas físicos, económicos y sociales caracterizados fundamentalmente por una elevada concentración espacial de población y empleo. Aunque la configuración de los sistemas urbanos presenta importantes particularidades alrededor del mundo, la economía ha logrado, con relativo éxito, organizar una estructura conceptual que permite identificar y explicar algunas fuerzas que conllevan a la concentración espacial de la población. Los trabajos de William Alonso, Richard Muth y Edwin Mills constituyen una de las más importantes contribuciones para sistematizar las ideas gener

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46

Sumnall, Jane Helen. "The role of spatial and temporal structure in stereopsis." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244627.

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47

Salah-Salah, Fatiha. "Cities in the Sahara : spatial structure and generative processes." Thesis, University College London (University of London), 1987. http://discovery.ucl.ac.uk/1317539/.

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The present thesis examines some aspects of the structure of urban space found in particular towns in the Sahara, and the peculiarities in their dual organisation of the circulation systems: the streets and the roof terraces of the houses inter-connected by another system of walkways, which are exclusively reserved for the circulation of women across the settlements or parts of the settlements. The terrace morphology is developed in different forms and at various degrees of elaboration in these urban systems, which are usually seen as the result of some external determinant factor, such as rel

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48

Li, Jian. "Fusing motion information with spatial structure for surveillance applications." Thesis, University of Bristol, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445811.

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Tzella, Alexandra. "Spatial structure of reactive scalars in chaotic advection flows." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612329.

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Payne, Joseph Allen. "Spatial structure of very low frequency modulated ionospheric currents /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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