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Dissertations / Theses on the topic 'Distance sampling'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Pollard, John. "Adaptive distance sampling." Thesis, University of St Andrews, 2002. http://hdl.handle.net/10023/15176.

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We investigate mechanisms to improve efficiency for line and point transect surveys of clustered populations by combining the distance methods with adaptive sampling. In adaptive sampling, survey effort is increased when areas of high animal density are located, thereby increasing the number of observations. We begin by building on existing adaptive sampling techniques, to create both point and line transect adaptive estimators, these are then extended to allow the inclusion of covariates in the detection function estimator. However, the methods are limited, as the total effort required cannot

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2

Oedekoven, Cornelia Sabrina. "Mixed effect models in distance sampling." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3618.

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Recently, much effort has been expended for improving conventional distance sampling methods, e.g. by replacing the design-based approach with a model-based approach where observed counts are related to environmental covariates (Hedley and Buckland, 2004) or by incorporating covariates in the detection function model (Marques and Buckland, 2003). While these models have generally been limited to include fixed effects, we propose four different methods for analysing distance sampling data using mixed effects models. These include an extension of the two-stage approach (Buckland et al., 2009), w

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Marques, Tiago André. "Incorporating measurement error and density gradients in distance sampling surveys /." St Andrews, 2007. http://hdl.handle.net/10023/391.

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Marques, Tiago Andre Lamas Oliveira. "Incorporating measurement error and density gradients in distance sampling surveys." Thesis, University of St Andrews, 2007. http://hdl.handle.net/10023/391.

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Distance sampling is one of the most commonly used methods for estimating density and abundance. Conventional methods are based on the distances of detected animals from the center of point transects or the center line of line transects. These distances are used to model a detection function: the probability of detecting an animal, given its distance from the line or point. The probability of detecting an animal in the covered area is given by the mean value of the detection function with respect to the available distances to be detected. Given this probability, a Horvitz-Thompson- like estima

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Glennie, Richard. "Incorporating animal movement with distance sampling and spatial capture-recapture." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/16467.

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Distance sampling and spatial capture-recapture are statistical methods to estimate the number of animals in a wild population based on encounters between these animals and scientific detectors. Both methods estimate the probability an animal is detected during a survey, but do not explicitly model animal movement. The primary challenge is that animal movement in these surveys is unobserved; one must average over all possible paths each animal could have travelled during the survey. In this thesis, a general statistical model, with distance sampling and spatial capture-recapture as special cas

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Alexandridis, Roxana Antoanela. "Minimum disparity inference for discrete ranked set sampling data." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1126033164.

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Thesis (Ph. D.)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formatted into pages; contains xi, 124 p.; also includes graphics. Includes bibliographical references (p. 121-124). Available online via OhioLINK's ETD Center

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7

Zerbini, Alexandre N. "Improving precision in multiple covariate distance sampling : a case study with whales in Alaska /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/5391.

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Miller, David. "On smooth models for complex domains and distances." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557819.

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Spline smoothing is a popular technique for creating maps of a spatial phenomenon. Most smoothers use the Euclidean metric to measure the distance between data. This approach is flawed since the distances between points in the domain as experienced by the objects within the domain are rarely Euclidean. For example, the movements of animals and people are subject to both physical and political boundaries (respectively) which must be navigated. Measuring distances between the objects using the incorrect (Euclidean) metric leads to incorrect inference. The first part of this thesis develops a fin

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9

Schold, Linnér Elisabeth. "Image processing on optimal volume sampling lattices : Thinking outside the box." Doctoral thesis, Uppsala universitet, Avdelningen för visuell information och interaktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-265340.

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This thesis summarizes a series of studies of how image quality is affected by the choice of sampling pattern in 3D. Our comparison includes the Cartesian cubic (CC) lattice, the body-centered cubic (BCC) lattice, and the face-centered cubic (FCC) lattice. Our studies of the lattice Brillouin zones of lattices of equal density show that, while the CC lattice is suitable for functions with elongated spectra, the FCC lattice offers the least variation in resolution with respect to direction. The BCC lattice, however, offers the highest global cutoff frequency. The difference in behavior between

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10

Barrett, Michelle L. "Comparison of estimated white-tailed deer (Odocoileus virginianus) population densities during two different seasons in the Miami University Natural Areas." Miami University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=miami1417016979.

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11

Smolensky, Nicole Limunga. "Population enumeration and the effects of oil and gas development on dune-dwelling lizards." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2848.

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12

Lacerda, Wagner Rafael. "Predação de plantas jovens de Euterpe edulis e invasão de lavouras de milho por Sapajus nigritus em remanescentes de floresta atlântica no sul do Brasil." Universidade Estadual do Oeste do Parana, 2013. http://tede.unioeste.br:8080/tede/handle/tede/680.

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Made available in DSpace on 2017-07-10T14:38:18Z (GMT). No. of bitstreams: 1 LACERDA.pdf: 2108583 bytes, checksum: abf7b4231c66cc12a04083c0090487bb (MD5) Previous issue date: 2013-07-18<br>The almost complete replacement of the native vegetation of the Atlantic Forest by agriculture and livestock generated an altered matrix in which are embedded fragments of different sizes and historical use and degradation. In this study, the population density of Sapajus nigritus was estimated in two forest fragments surrounded by agricultural crops in southern Brazil. We use the method of linear transect

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13

Eckervall, Anneli. "Comparison of plot survey and distance sampling as pellet group counts for deer in Sweden." Thesis, University of Skövde, School of Life Sciences, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-921.

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<p>Wildlife management deals with problems concerning sustainable harvest, conservation of threatened species and adjustment of wildlife populations to levels acceptable to for instance forestry, agriculture, traffic and conservation interests. A detailed knowledge of the population is then required. It is therefore important to develop reliable and cost-efficient survey methods.</p><p>The purpose of this study was to test the distance sampling method where objects are observed while walking along a line, as a way of counting deer pellet groups and to compare the results with ordinary plot sur

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Pérez, J. M., M. Sarasa, G. Moço, et al. "The effect of data analysis strategies in density estimation of mountain ungulates using distance sampling." Bachelor's thesis, Italian Journal of Zoology, 2014. http://hdl.handle.net/10174/16907.

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Distance sampling is being extensively used to estimate the abundance of animal populations. Nevertheless, the great variety of ways in which data can be analyzed may limit comparisons due to the lack of standardization of such protocols. In this study, the influence of analytical procedures for distance sampling data on density estimates and their precision was assessed. We have used data from 21 surveys of mountain ungulates in the Iberian Peninsula, France and the Italian Alps. Data from such surveys were analyzed with the program Distance 6.0. Our analyses show that estimated density can b

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Azevedo, Francisco Pereira. "Quantas galinholas Bostrychia bocagei existem em São Tomé?: uso do Distance Sampling e do Plot Sampling para estimar a população de uma ave endémica criticamente ameaçada." Master's thesis, Universidade de Évora, 2015. http://hdl.handle.net/10174/16421.

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A galinhola Bostrychia bocageié uma ave endémica do centro e sul da ilha de São Tomé (costa oeste da África central), classificada como Criticamente em Perigo devido a um efetivo populacional presumido entre os 50 e 249 indivíduos adultos. Neste trabalho fazemos as primeiras estimativas populacionais para a espécie, com base na recolha sistemática de dados no terreno. Para tal usamos o density surfacemodelling(DSM) de observações recolhidas em amostragem por distâncias ao longo de 32 km de transectos lineares e a prospeção intensiva de 29 quadrículas de 2 ha. O DSM estimou um número total de 2

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Otto, Mitchell Lee. "ESTIMATION OF WHITE-TAILED DEER (ODOCOILEUS VIRGINIANUS) POPULATION DENSITIES IN MIAMI UNIVERSITY’S NATURAL AREAS USING DISTANCE SAMPLING." Miami University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=miami1390821089.

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17

Robert, Klaus Bauer. "Development of a robust index of abundance for Atlantic bluefin tuna (Thunnus thynnus) through aerial surveys in the Northwestern Mediterranean Sea." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS042/document.

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Le déclin du thon rouge de l'Atlantique nord-est et de Méditerranée (ABFT, Thunnus thynnus) qui faisait suite à une forte surexploitation a été largement médiatisé au cours de la dernière décennie. Pour contrer cette tendance et reconstituer ce stock, d’importantes mesures de gestion ont été mises en place à partir de 2007. En dehors des difficultés liées à leur mise en œuvre et à leur contrôle, la gestion des pêcheries thonières est aussi limitée dans les capacités à suivre précisément les variations d’abondance de ces espèces dont les observations reposent principalement sur les données de p

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18

Falcetto, Andrea. "Greater Galagos near Mt. Kasigau, Kenya: Population Density Estimates." TopSCHOLAR®, 2012. http://digitalcommons.wku.edu/theses/1187.

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This study examined population density and habitat use of a species of greater galago, genus Otolemur, around Mt. Kasigau, Kenya. Mt. Kasigau has a unique regional microclimate, a cloud forest, which provides many different flora and fauna a home. To examine population density, two different methods were used. The first method was using line transects and analyzing results using Distance 6.0. These surveys were conducted during both dry and wet season and results were compared after the study. The second method was to trap individuals and use mark-recapture to determine population density. Whe

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Urbanek, Rachael Elizabeth. "ECOLOGICAL AND SOCIETAL IMPACTS OF SUBURBAN WHITE-TAILED DEER: A CASE STUDY IN THE CHICAGO METROPOLITAN AREA." OpenSIUC, 2012. https://opensiuc.lib.siu.edu/dissertations/509.

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Many natural resource agencies are managing white-tailed deer (Odocoileus virginianus) populations in suburban areas and require information about deer populations, deer impacts on vegetation, and human preferences toward deer and deer management to support decision making. My study based in the Chicago Metropolitan Area during 2007-2011, utilized a multi-faceted approach to investigate common obstacles in suburban deer management. In my findings, I discuss the need for managers to examine suburban deer populations and management issues at a broader scale (i.e., countywide versus single comm

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20

Anderson, Charles Wayne. "ECOLOGY AND MANAGEMENT OF WHITE-TAILED DEER IN AN AGRICULTURAL LANDSCAPE: ANALYSES OF HUNTER EFFICIENCY, SURVEY METHODS, AND ECOLOGY." OpenSIUC, 2010. https://opensiuc.lib.siu.edu/dissertations/178.

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Current research is necessary to focus management of white-tailed deer (Odocoileus virginianus) in the agricultural Midwest, especially given the novel presence of chronic wasting disease in the region. My objectives were to: 1) examine the potential effects of weather and row-crop harvest on daily harvest of white-tailed deer by archery, and individual hunter variables (e.g., age, weapon preference, preference of hunting method) on individual hunter efficiency and success in 2 regions of Illinois (i.e., east-central and southern Illinois); 2) estimate white-tailed deer densities using direct

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21

Jalca, Angie, Marco Lopez, Fernando Sotelo, and Carlos Raymundo. "Adoption of snowball sampling technique with distance boundaries to assess the productivity issue faced by micro and small cocoa producers in Cusco." Springer Verlag, 2020. http://hdl.handle.net/10757/656127.

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The food supply chain has gained impulse over the past few years induced by the rising global demand for food; therefore, much emphasis is placed upon examining this class of supply chains. It also faces constant production, storage, and distribution challenges, wherein the key link for proper operation is the farmer, who engages in the agricultural sector, heavily impacted by low crop productivity, which interfer with economic development at a national level. Consequently, it is important to assess those farmers who belong to micro and small enterprises in the agricultural sector. Due to the

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22

Ozdirek, Lutfiye. "Estimation Of Demography And Seasonal Habitat Use Patterns Of Anatolian Mouflon (ovis Gmelinii Anatolica) In Konya Bozdag Protection Area Using Distance Sampling." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12611189/index.pdf.

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The Anatolian mouflon (Ovis gmelinii anatolica) is an endemic ungulate subspecies and of IUCN Vulnerable status that inhabits Konya-Bozdag region located in Central Anatolia. In this thesis, the demography and habitat use of the only natural population of Anatolian mouflon at Konya-Bozdag Provice is studied. Throughout the study, distance sampling techniques, specifically line transect sampling, are used to estimate density, size and growth rate of this population. Sex, age and count data are used to estimate relevant parameters. Changes in population structure and seasonal area use are monit

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23

Örn, Henrik. "Accuracy and precision of bedrock sur-face prediction using geophysics and geostatistics." Thesis, KTH, Mark- och vattenteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171859.

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In underground construction and foundation engineering uncertainties associated with subsurface properties are inevitable to deal with. Site investigations are expensive to perform, but a limited understanding of the subsurface may result in major problems; which often lead to an unexpected increase in the overall cost of the construction project. This study aims to optimize the pre-investigation program to get as much correct information out from a limited input of resources, thus making it as cost effective as possible. To optimize site investigation using soil-rock sounding three different

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24

Ayhan, Dilber. "Multi-class Classification Methods Utilizing Mahalanobis Taguchi System And A Re-sampling Approach For Imbalanced Data Sets." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610521/index.pdf.

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Classification approaches are used in many areas in order to identify or estimate classes, which different observations belong to. The classification approach, Mahalanobis Taguchi System (MTS) is analyzed and further improved for multi-class classification problems under the scope of this thesis study. MTS tries to explore significant variables and classify a new observation based on its Mahalanobis distance (MD). In this study, first, sample size problems, which are encountered mostly in small data sets, and multicollinearity problems, which constitute some limitations of MTS, are analyzed an

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Macedo, Ana Luísa Vasques de Carvalho e. "Monitorização das populações de ungulados da Tapada Nacional de Mafra." Master's thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/15553.

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Mestrado em Ecologia Aplicada<br>Durante as últimas décadas tem-se verificado um declínio dramático da biodiversidade mundial, sobretudo devido a alterações climáticas e à pressão antropogénica; como tal a implementação e mecanismos de gestão com vista a garantir a sobrevivência de espécies é cada vez mais importante. Apesar de em Portugal nas últimas décadas as populações de alguns ungulados selvagens, como o veado e o javali terem aumentado torna-se necessário um acompanhamento contínuo das suas populações. O presente estudo foi desenvolvido na Tapada Nacional de Mafra com o intuito de colm

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26

Flesch, Aaron D., Sanchez Carlos Gonzalez, and Amarillas Javier Valenzuela. "Abundance and habitat relationships of breeding birds in the Sky Islands and adjacent Sierra Madre Occidental of northwest Mexico." WILEY-BLACKWELL, 2016. http://hdl.handle.net/10150/621225.

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The Sierra Madre Occidental and neighboring Madrean Sky Islands span a large and biologically diverse region of northwest Mexico and portions of the southwestern United States. Little is known about the abundance and habitat use of breeding birds in this region of Mexico, but such information is important for guiding conservation and management. We assessed densities and habitat relationships of breeding birds across Sky Island mountain ranges in Mexico and adjacent portions of the Sierra Madre from 2009 to 2012. We estimated densities at multiple spatial scales, assessed variation in densitie

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Opravil, Jan. "Systém pro optické měření." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219684.

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This diploma thesis deals with the creation and testing of optical measurement system. There are basic parts of computer vision. Some ways of image preprocessing and templates matching are discussed. Everything is directed to a particular practical task. Selected methods for templates matching are the Correlation Method, the Classical and Hybrid Hausdorff Distance, Radial and Circular Sampling Space. These methods are programmed in C++ and they are compared with function for searching templates from specific library.

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Peterson, Thomas E. "FACTORS AFFECTING DENSITIES OF WHITE-TAILED DEER (ODOCOILEUS VIRGINIANUS) IN EASTERN DECIDUOUS FOREST: THE ROLES OF AND SURROUNDING LAND USE, FOREST HABITAT EDGE, AND INVASIVE SHRUBS." Miami University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami1526295117069628.

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Matthews, Jonathan A. "QUANTIFYING WHITE-TAILED DEER DENSITY AND ITS IMPACTS ON AGRICULTURAL SYSTEMS." UKnowledge, 2019. https://uknowledge.uky.edu/forestry_etds/47.

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White-tailed deer (Odocoileus virginianus) commonly consume row crops, with yield losses often attributed to their browsing. Deer density and field morphology may predict yield losses within local areas. We sought to 1) determine the effects of deer browsing on corn and soybean yields and investigate if deer density or field morphology correlated to yield loss in western Kentucky, and 2) compare pellet-based distance sampling to game camera surveys to determine if a distance sampling technique could accurately estimate deer density during the growing season. Overall, deer reduced corn and soyb

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Valente, Ana Margarida dos Santos. "Red and roe deer densities and distribution in Northeastern Portugal." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/14929.

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Mestrado em Ecologia Aplicada<br>Monitoring ungulates is a major challenge to perform management strategies, either back in the 70’s to enable their conservation that lead to their great recovery, as to manage their actual expansion. Their current wide range distribution and high den-sities across Europe promotes damages in ecosystems that need to be handled based on scientific knowledge. In Portugal ungulate monitoring and ecology is still in an early stage, however efforts have been made to gather valid information on north-eastern ungulate populations. In this work density of red and roe de

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Costa, Marina. "Abundance and distribution of delphinids in the Red Sea (Egypt)." Thesis, University of St Andrews, 2015. http://hdl.handle.net/10023/6802.

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Knowledge about cetaceans in the Red Sea is limited with only a handful of sporadic or spatially-limited studies carried out to date. Funded by the Italian Cooperation through a Debt-for-Nature Swap programme and carried out in collaboration with the Egyptian NGO HEPCA, this thesis presents the results from the first ever systematic vessel-based surveys conducted in the southern Egyptian Red Sea from 2010 to 2013 using linetransect methodology. The main aims of the thesis were (a) to estimate cetacean abundance, (b) to determine distribution patterns and habitat use of the cetacean species, (c

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32

Riou-Durand, Lionel. "Theoretical contributions to Monte Carlo methods, and applications to Statistics." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLG006/document.

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La première partie de cette thèse concerne l'inférence de modèles statistiques non normalisés. Nous étudions deux méthodes d'inférence basées sur de l'échantillonnage aléatoire : Monte-Carlo MLE (Geyer, 1994), et Noise Contrastive Estimation (Gutmann et Hyvarinen, 2010). Cette dernière méthode fut soutenue par une justification numérique d'une meilleure stabilité, mais aucun résultat théorique n'avait encore été prouvé. Nous prouvons que Noise Contrastive Estimation est plus robuste au choix de la distribution d'échantillonnage. Nous évaluons le gain de précision en fonction du budget computat

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Dénes, Francisco Voeroes. "Abundância de aves de rapina no Cerrado e Pantanal do Mato Grosso do Sul e os efeitos da degradação de hábitat: perspectivas com métodos baseados na detectabilidade." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/41/41133/tde-15012015-152016/.

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A urbanização e a expansão das fronteiras agrícolas na região Neotropical estão entre as principais forças causadoras da degradação ambiental em hábitats abertos naturais. Inferências e estimativas de abundância são críticas para quantificação de dinâmicas populacionais e impactos de mudanças ambientais. Contudo, a detecção imperfeita e outros fenômenos que causam inflação de zeros podem induzir erros de estimativas e dificultar a identificação de padrões ecológicos. Examinamos como a consideração desses fenômenos em dados de contagens de indivíduos não marcados pode informar na escolha do mét

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Morgado, Maria de Fátima Romão. "Selecção de modelos em amostragem por distâncias." Master's thesis, Universidade de Évora, 2008. http://hdl.handle.net/10174/18339.

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A selecção do modelo que se ajuste adequadamente a um conjunto de dados é uma parte fulcral no processo da inferência estatística. O critério mais comum para seleccionar uma função de detectabilidade, que se ajuste a um conjunto de dados de distâncias, baseado na informação K-L, denomina-se critério de informação de Akaike (AIC). Para avaliar a performance da rotina da selecção de modelos implementada no programa DISTANCE, realizaram-se simulações Monte Carlo para gerar dados de duas funções densidade de probabilidade frequentemente usadas. Aplicando esta metodologia, observou-se um enviesamen

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Cao, Phuong Thao. "Approximation of OLAP queries on data warehouses." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00905292.

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We study the approximate answers to OLAP queries on data warehouses. We consider the relative answers to OLAP queries on a schema, as distributions with the L1 distance and approximate the answers without storing the entire data warehouse. We first introduce three specific methods: the uniform sampling, the measure-based sampling and the statistical model. We introduce also an edit distance between data warehouses with edit operations adapted for data warehouses. Then, in the OLAP data exchange, we study how to sample each source and combine the samples to approximate any OLAP query. We next c

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Nold, Mariana Saskia Verfasser], Susanne [Akademischer Betreuer] [Rässler, and Georg [Akademischer Betreuer] Heinze. "Behavior of convergence in logistic regression models - Assessing the drop of the Kolmogorov distance between the sampling distribution and the asymptotic distribution of estimators and test statistics in logistic regression analysis / Mariana Saskia Nold. Betreuer: Susanne Rässler ; Georg Heinze." Bamberg : Otto-Friedrich-Universität Bamberg, 2014. http://d-nb.info/1058554395/34.

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Cox, Martin James. "Acoustic and ecological investigations into predator-prey interactions between Antarctic krill (Euphausia superba) and seal and bird predators." Thesis, St Andrews, 2008. http://hdl.handle.net/10023/579.

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Moustafa, Harb Hassan. "Gestion efficace de données et couverture dans les réseaux de capteurs sans fil." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2020/document.

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Dans cette thèse, nous proposons des techniques de gestion de données pour économiser l’énergie dans les réseaux de capteurs périodiques basés sur l’architecture de clustering. Premièrement, nous proposons d’adapter le taux d’échantillonnage du capteur à la dynamique de la condition surveillée en utilisant le modèle de one-way ANOVA et des tests statistiques (Fisher, Tukey et Bartlett), tout en prenant en compte l’énergie résiduelle du capteur. Le deuxième objectif est d’éliminer les données redondantes générées dans chaque cluster. Au niveau du capteur, chaque capteur cherche la similarité en

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Riou-Durand, Lionel. "Theoretical contributions to Monte Carlo methods, and applications to Statistics." Electronic Thesis or Diss., Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLG006.

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La première partie de cette thèse concerne l'inférence de modèles statistiques non normalisés. Nous étudions deux méthodes d'inférence basées sur de l'échantillonnage aléatoire : Monte-Carlo MLE (Geyer, 1994), et Noise Contrastive Estimation (Gutmann et Hyvarinen, 2010). Cette dernière méthode fut soutenue par une justification numérique d'une meilleure stabilité, mais aucun résultat théorique n'avait encore été prouvé. Nous prouvons que Noise Contrastive Estimation est plus robuste au choix de la distribution d'échantillonnage. Nous évaluons le gain de précision en fonction du budget computat

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40

Lebrat, Léo. "Projection au sens de Wasserstein 2 sur des espaces structurés de mesures." Thesis, Toulouse, INSA, 2019. http://www.theses.fr/2019ISAT0035.

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Cette thèse s’intéresse à l’approximation pour la métrique de 2-Wasserstein de mesures de probabilité par une mesure structurée. Les mesures structurées étudiées sont des discrétisations consistantes de mesures portées par des courbes continues à vitesse et à accélération bornées. Nous comparons deux types d’approximations pour ces courbes continues : l’approximation constante par morceaux et linéaire par morceaux. Pour chaque méthode, des algorithmes rapides et fonctionnant pour une discrétisation fine ont été développés. Le problème d’approximation se divise en deux étapes avec leurs propres

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Bringmann, Karl Verfasser], and Kurt [Akademischer Betreuer] [Mehlhorn. "Sampling from discrete distributions and computing Fréchet distances / Karl Bringmann. Betreuer: Kurt Mehlhorn." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2015. http://d-nb.info/1065669763/34.

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Hulme, Mark F. "The density and diversity of birds on farmland in West Africa." Thesis, St Andrews, 2007. http://hdl.handle.net/10023/424.

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Amorim, Fernanda Alves de. "Densidade populacional e seleção de habitat pelo mutum-do-sudeste, Crax blumenbachii, na Reserva Natural Vale, Linhares, Espírito Santo." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/41/41133/tde-06032015-152602/.

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O mutum-do-sudeste é endêmico da Mata Atlântica de baixada e foi extinto de quase toda sua distribuição original devido ao desmatamento e a caça. Hoje é listado como ameaçado e a falta de conhecimento sobre sua ecologia dificulta o manejo da espécie. Este trabalho teve como objetivo estimar a densidade populacional do mutum-do-sudeste na Reserva Natural Vale (RNV) através do método de transecção linear. Os registros feitos durante as amostragens também foram utilizados para verificar a existência de seleção de habitat por meio da comparação de áreas onde a espécie foi registrada com áreas alea

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Yngman, Gunnar. "Individualization of fixed-dose combination regimens : Methodology and application to pediatric tuberculosis." Thesis, Uppsala universitet, Institutionen för farmaceutisk biovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-242059.

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Introduction: No Fixed-Dose Combination (FDC) formulations currently exist for pediatric tuberculosis (TB) treatment. Earlier work implemented, in the software NONMEM, a rational method for optimizing design and individualization of pediatric anti-TB FDC formulations based on patient body weight, but issues with parameter estimation, dosage strata heterogeneity and representative pharmacokinetics remained. Aim: To further develop the rational model-based methodology aiding the selection of appropriate FDC formulation designs and dosage regimens, in pediatric TB treatment. Materials and Methods

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Farah, Saïd. "Etude et mise en œuvre d’un banc intégré et étalonné 4 canaux pour la caractérisation temporelle de dispositifs non-linéaires hyperfréquences." Thesis, Limoges, 2017. http://www.theses.fr/2017LIMO0010/document.

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Ce travail de cette thèse propose une conception et une réalisation d’un banc intégré de caractérisation temporelle des dispositifs RF non-linéaires conçu avec des récepteurs de type THA. Ce banc est une version miniaturisée, moins onéreuse et à performances comparables d’un banc similaire « éclaté » et développé au sein d’XLIM. Le banc intégré développé dans ce travail est entièrement étalonné. Il est versatile vis-à-vis des techniques de sous échantillonnage mis en œuvre pour mesurer des signaux RF sur des temps d’acquisition très différents (<50 µs ou < quelques ms). La technique CIS

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Vestin, Albin, and Gustav Strandberg. "Evaluation of Target Tracking Using Multiple Sensors and Non-Causal Algorithms." Thesis, Linköpings universitet, Reglerteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-160020.

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Today, the main research field for the automotive industry is to find solutions for active safety. In order to perceive the surrounding environment, tracking nearby traffic objects plays an important role. Validation of the tracking performance is often done in staged traffic scenarios, where additional sensors, mounted on the vehicles, are used to obtain their true positions and velocities. The difficulty of evaluating the tracking performance complicates its development. An alternative approach studied in this thesis, is to record sequences and use non-causal algorithms, such as smoothing, i

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Chen-Chi, Sun, and 孫政啟. "The Effect of Sampling Frequency on Digital Distance Protection." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/14668692677537596356.

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碩士<br>國立臺灣科技大學<br>電機工程研究所<br>82<br>To obtain a safety and reliability protection system, digital protective relay requires accurate filtering and relaying algorithms. As we know, the frequency of a power system will drift when disturbances occur. Therefore, if the sampling frequency keeps constant, it may result in unacceptable consequence. In this thesis, an adaptive sampling algorithm is proposed. The algorithm utilizes phase locked function to adjust the sampling frequency according to t

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Correia, Iúri Josiane Frizado. "Estimating caribou abundance in West Greenland using distance sampling methods." Master's thesis, 2020. http://hdl.handle.net/10451/45252.

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Trabalho de projecto de mestrado, Bioestatística, Universidade de Lisboa, Faculdade de Ciências, 2020<br>O caribu, Rangifer tarandus groenlandicus, é uma das treze subespécies de rena que habita as regiões circumpolares do hemisfério Norte, sendo nativa da Gronelândia. A maioria dos estudos de investigação feitos no passado foram, regra geral, de curta duração, limitados e frequentemente mal desenhados ou extremamente enviesados. Ao ser caçado há pelo menos 4000 anos, o caribu possui elevada importância para as populações locais. Como tal, métodos com maior eficiência e precisão precisam de se

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Wu, Tsung-Wei, and 吳崇維. "The Study of Improving the Shared Sampling Method for Alpha Matting Based on Earth Mover's Distance." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/v5nst8.

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碩士<br>元智大學<br>電機工程學系<br>106<br>Image matting purposes to cut the foreground region from an image by calculating pixel’s color value and estimating alpha value. In the past ten years, lots of papers on image matting have been published. Most of them obtain lower difference by using laplacian matting model. However, those algorithms’ laplacian matrix has too many elements, it takes a lot of time to solve the linear equations. In this paper, we do not want to spend too much time in the computing process, so choosing Shared Matting as our basic algorithm because it’s low cost time. And using Earth

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Němec, Petr. "Analýza a optimalizace inventarizačních metod v podmínkách tropického deštného lesa v peruánské Amazonii." Doctoral thesis, 2014. http://www.nusl.cz/ntk/nusl-177232.

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The submitted work compares results of two forest inventories conducted on the plot of 200 ha within the forestry concession in the tropical rainforest in the Peruvian Amazon. First inventory conducted in 2007 used for field data collection the common method with tapes and mechanical compasses. The second inventory conducted in 2008 used a set of electronic devices, consisting of a field computer, laser rangefinder, electronic compass, a GPS unit and a specialized software Field-Map. In both inventories the positions of all trees with a dbh bigger or equal 400 mm were mapped and following attr

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