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Rozprawy doktorskie na temat „Assessment; Monitoring; Point cloud”

Autor: Grafiati

Data publikacji: 28 lipca 2024

Data aktualizacji: 31 lipca 2025

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1

Quach, Maurice. "Deep learning-based Point Cloud Compression." Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPASG051.

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Les nuages de points deviennent essentiels dans de nombreuses applications et les progrès des technologies de capture conduisent à des volumes de données croissants.La compression est donc essentielle pour le stockage et la transmission.La compression des nuages de points peut être divisée en deux parties : la compression de la géométrie et des attributs.En outre, l'évaluation de la qualité des nuages de points est nécessaire afin d'évaluer les méthodes de compression des nuages de points.La compression de la géométrie, la compression des attributs et l'évaluation de la qualité constituent les

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Megahed, Fadel M. "The Use of Image and Point Cloud Data in Statistical Process Control." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/26511.

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The volume of data acquired in production systems continues to expand. Emerging imaging technologies, such as machine vision systems (MVSs) and 3D surface scanners, diversify the types of data being collected, further pushing data collection beyond discrete dimensional data. These large and diverse datasets increase the challenge of extracting useful information. Unfortunately, industry still relies heavily on traditional quality methods that are limited to fault detection, which fails to consider important diagnostic information needed for process recovery. Modern measurement technologies sho

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Dinh-Xuan, Lam [Verfasser], and Phuoc [Gutachter] Tran-Gia. "Quality of Experience Assessment of Cloud Applications and Performance Evaluation of VNF-Based QoE Monitoring / Lam Dinh-Xuan ; Gutachter: Phuoc Tran-Gia." Würzburg : Universität Würzburg, 2018. http://d-nb.info/1169573053/34.

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Gray, Michelle Anya. "Assessing non-point source pollution in agricultural regions of the upper St. John River basin using the slimy sculpin (Cottus cognatus)." Thesis, Department of Biology, University of New Brunswick, 2003. http://hdl.handle.net/1882/48.

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The overall objective of this research project was to assess whether fish populations in areas of potato cultivation responded to changes in environmental conditions. An effects-based assessment was conducted in the ‘potato belt’ of northwestern New Brunswick in the Little River catchment. From 1999-2001, the health and performance of slimy sculpin (Cottus cognatus) was monitored in agricultural and forested sections of the river. In the fall of 1999 and 2000, agricultural sites had fewer young-of-the-year (YOY) sculpin than the forested region. Adult sculpin were larger in the agricultural re

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Lama, Salomon Abraham. "Digital State Models for Infrastructure Condition Assessment and Structural Testing." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/84502.

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This research introduces and applies the concept of digital state models for civil infrastructure condition assessment and structural testing. Digital state models are defined herein as any transient or permanent 3D model of an object (e.g. textured meshes and point clouds) combined with any electromagnetic radiation (e.g., visible light, infrared, X-ray) or other two-dimensional image-like representation. In this study, digital state models are built using visible light and used to document the transient state of a wide variety of structures (ranging from concrete elements to cold-formed stee

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Scharf, Alexander. "Terrestrial Laser Scanning for Wooden Facade-system Inspection." Thesis, Luleå tekniska universitet, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-77159.

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The objective of this study was to evaluate the feasibility of measuring movement, deformation and displacement in wooden façade-systems by terrestrial laser scanning. An overview of different surveying techniques and methods has been created. Point cloud structure and processing was explained in detail as it is the foundation for understanding the advantages and disadvantages of laser scanning. The boundaries of monitoring façades with simple and complex façade structures were tested with the phase-based laser scanner FARO Focus 3DS. In-field measurements of existing facades were done to s

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Crabtree, Gärdin David, and Alexander Jimenez. "Optical methods for 3D-reconstruction of railway bridges : Infrared scanning, Close range photogrammetry and Terrestrial laser scanning." Thesis, Luleå tekniska universitet, Byggkonstruktion och brand, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67716.

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The forecast of the next upcoming years estimates a growth of demand in transport. As the railway sector in Europe has developed over many years, the infrastructure presents performance issues because of, among other factors, asset maintenance activities being difficult and time consuming. There are currently 4000 railway bridges in Sweden managed by Trafikverket which are submitted to inspections at least every six years. The most common survey is done visually to determine the physical and functional condition of the bridges as well as finding damages that may exist on them. Because visual i

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Benneyworth, Laura Mahoney. "Distribution of Trace Elements in Cumberland River Basin Reservoir Sediments." TopSCHOLAR®, 2011. http://digitalcommons.wku.edu/theses/1113.

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The U.S. Army Corps of Engineers, Nashville District, maintains ten reservoirs in the Cumberland River Basin in Kentucky and Tennessee, and has been monitoring sediment chemistry in the reservoirs since 1994. The purpose of this study is to evaluate the sediment data collected from the reservoirs from 1994 to 2010 to determine if there are any spatial patterns of the trace elements: arsenic, beryllium, cadmium, chromium, copper, lead, mercury, nickel, and zinc. The results indicated that trace element levels were consistent with national baseline concentrations measured by the U.S. Geological

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Williams, Keith E. "Accuracy assessment of LiDAR point cloud geo-referencing." Thesis, 2012. http://hdl.handle.net/1957/30209.

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Three-dimensional laser scanning has revolutionized spatial data acquisition and can be completed from a variety of platforms including airborne (ALS), mobile (MLS), and static terrestrial (TLS) laser scanning. MLS is a rapidly evolving technology that provides increases in efficiency and safety over static TLS, while still providing similar levels of accuracy and resolution. The componentry that make up a MLS system are more parallel to Airborne Laser Scanning (ALS) than to that of TLS. However, achievable accuracies, precisions, and resolution results are not clearly defined for MLS syste

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Bates, Jordan Steven. "Oblique UAS imagery and point cloud processing for 3D rock glacier monitoring." Master's thesis, 2020. http://hdl.handle.net/10362/94396.

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Dissertation submitted in partial fulfilment of the requirements for the degree of Master of Science in Geospatial Technologies<br>Rock glaciers play a large ecological role and are heavily relied upon by local communities for water, power, and revenue. With climate change, the rate at which they are deforming has increased over the years and is making it more important to gain a better understanding of these geomorphological movements for improved predictions, correlations, and decision making. It is becoming increasingly more practical to examine a rock glacier with 3D visualization to have

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Dinh-Xuan, Lam. "Quality of Experience Assessment of Cloud Applications and Performance Evaluation of VNF-Based QoE Monitoring." Doctoral thesis, 2018. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-169182.

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In this thesis various aspects of Quality of Experience (QoE) research are examined. The work is divided into three major blocks: QoE Assessment, QoE Monitoring, and VNF Performance Evaluation. First, prominent cloud applications such as Google Docs and a cloud-based photo album are explored. The QoE is characterized and the influence of packet loss and delay is studied. Afterwards, objective QoE monitoring for HTTP Adaptive Video Streaming (HAS) in the cloud is investigated. Additionally, by using a Virtual Network Function (VNF) for QoE monitoring in the cloud, the feasibility of an interwor

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Dias, Ana Catarina Duque. "Cyclist performance assessment based on WSN and cloud technologies." Master's thesis, 2018. http://hdl.handle.net/10071/18462.

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Mobility in big cities is a growing problem and the use of bicycles has been a solution which, together with new sharing services, helps to motivate users. There are also more and more users practicing sports involving the use of bicycles. It was in this context that the present dissertation was developed, a distributed sensor system for monitoring cyclists. With the support of a wireless sensor network connected to the internet and, using a set of smart sensors as end-nodes, it is possible to obtain data that will help the cyclist to improve his performance. The coach can monitor and ev

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Zimmer, Camille. "Innovative techniques for the quantification of waterborne microbial risks in field studies." Thesis, 2019. http://hdl.handle.net/1828/11090.

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In low-resource contexts, household-level point-of-use water treatment (POUWT) techniques are the final, and sometimes only, barrier against waterborne illnesses, and in these and other water-related applications, health risks can be quantified using one of two methods. Firstly, Escherichia coli (or other indicator organism) counts can be used to monitor water and determine adherence to a health-based limit (i.e. compliance monitoring). Secondly, E. coli can be used to conduct a quantitative microbial risk assessment (QMRA), indicating the level of protection conferred by a given POUWT device

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DOTTA, GIULIA. "Semi-automatic analysis of landslide spatio-temporal evolution." Doctoral thesis, 2017. http://hdl.handle.net/2158/1076767.

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Le tecniche di rilevamento rappresentano un utile strumento per rilevare e caratterizzare i processi gravitativi di versante, in particolare attraverso l’uso di approcci volti ad individuare le aree in movimento. Nel dettaglio, tecniche come il laser scanner terrestre e la fotogrammetria digitale permettono di ottenere rappresentazioni ad alta risoluzione dello scenario osservato sotto forma di una nuvola di punti (point cloud) in tre dimensioni. Durante gli ultimi anni, l’uso delle nuvole di punti per investigare i cambiamenti morfologici a scala temporale e spaziale, è notevolmente aum

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NOBILE, ALESSIA. "I sistemi a scansione 3D per la documentazione metrica e lo studio diagnostico dei Beni Culturali. Dalla scala edilizia alla scala urbana. I casi studio della Basilica dell’Umiltà di Pistoia e delle Torri di San Gimignano." Doctoral thesis, 2013. http://hdl.handle.net/2158/797885.

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L’attività di ricerca si è sviluppata con l’obiettivo di sperimentare i metodi e le tecniche di acquisizione, gestione e rappresentazione tridimensionale mediante l’uso del laser scanner per offrire un valido supporto alla documentazione e alla diagnostica finalizzate alla conservazione del nostro patrimonio culturale costruito. L’ampia diffusione delle tecniche di scansione non ci consente ancora di considerare concluso un tema di ricerca che erroneamente oggi si identifica soprattutto con la fase di “acquisizione dei dati”. Il problema è in realtà posposto alle fasi successive di elaborazion

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(8803076), Jordan M. McGraw. "Implementation and Analysis of Co-Located Virtual Reality for Scientific Data Visualization." Thesis, 2020.

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<div>Advancements in virtual reality (VR) technologies have led to overwhelming critique and acclaim in recent years. Academic researchers have already begun to take advantage of these immersive technologies across all manner of settings. Using immersive technologies, educators are able to more easily interpret complex information with students and colleagues. Despite the advantages these technologies bring, some drawbacks still remain. One particular drawback is the difficulty of engaging in immersive environments with others in a shared physical space (i.e., with a shared virtual environment

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