• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 9
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 19
  • 19
  • 6
  • 5
  • 5
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Model-based Assessment of Heat Pump Flexibility

Wolf, Tobias January 2016 (has links)
Today's energy production is changing from scheduled to intermittent generation due to the increasing energy injection from renewable sources. This alteration requires flexibility in energy generation and demand. Electric heat pumps and thermal storages were found to have a large potential to provide demand flexibility which is analysed in this work. A three-fold method is set up to generate thermal load profiles, to simulate heat pump pools and to assess heat pump flexibility. The thermal profile generation based on a combination of physical and behavioural models is successfully validated against measurement data. A randomised system sizing procedure was implemented for the simulation of heat pump pools. The parameter randomisation yields correct seasonal performance factors, full load hours and average operation cycles per day compared to 87 monitored systems. The flexibility assessment analysis the electric load deviation of representative heat pump pool in response to 5 different on / off signals. The flexibility is induced by the capacity of thermal storages and analysed by four parameters. Generally, on signals are more powerful than off signals. A generic assessment by the ambient temperature yield that the flexibility is highest for heating days and the activated additional space heating storage: Superheating of the storage to the maximal temperature provides a flexible energy of more than 400 kWh per 100 heat pumps in a temperature range between -10 and +13 °C.
2

Reclaiming Our Lands: Muskoday First Nation’s Narrative of

2013 October 1900 (has links)
ABSTRACT The objective of this Grounded theory thesis was to apply the Harvard Project on Indian Economic Development’s Nation-Building model as a theoretical framework to examine Muskoday First Nation’s efforts to regain control over their lands and resources within the Treaty framework. Additionally, this model has generated discussion, but has not been tested to any great extent in the Canadian context. Muskoday First Nation was selected as case study because the community was one of the original signatories of the Framework Agreement on First Nations Land Management and had implemented its own Land Code. Additionally, Muskoday is the first community in Saskatchewan to successfully negotiate and implement a Treaty Land Entitlement Claim. The purpose of my thesis research was to determine what internal mechanisms contributed to Muskoday First Nation’s efforts to restore authority of their reserve lands and resources. The findings of the research indicated that Muskoday First Nation has a strong cultural drive for authority over the lands and resources and maintains collective ownership over lands as agreed upon in Treaty.
3

Building model reconstruction from lidar data and aerial photographs

Ma, Ruijin 06 January 2005 (has links)
No description available.
4

Centers of Excellence: A Systems-Building Model for Children in Custody

Pumariega, Andres J., Moser, Michele R. 01 October 2011 (has links)
The abstract is available in the Neuropsychiatrie de l'Enfance et de l'Adolescence.
5

Zaměření rodinného domu v Brně Žabovřeskách / Surveying of family house in Brno Žabovřesky locality

Chládeková, Paulína January 2020 (has links)
This diploma thesis is about measuring of family house, creating drawings and visualization of results. The family house is located in the Brno-Žabovřesky The house was surveyed by the classical geodetic method using a survey net built using GNSS (Global Navigation Satellite System). The results of field measurements were processed in the Groma program, graphic outputs (footprints of individual floors, sections and 3D model) in the MicroStation application. The documentation can be used mainly for the planned reconstruction of the family house and other related purposes.
6

Informační model skutečného provedení rodinného domu / As-built Building Information model of the House

Zachová, Michaela January 2020 (has links)
This diploma thesis deals with the creation of an information model of an existing family house based on data obtained by laser scanning. The first part of the diploma thesis contains information on the issue of the BIM method, its state in the world and in the Czech Republic. It also describes the principle of laser scanning. The next part of the work is devoted to the practical processing of the information model of the building in the environment of the Revit software. The output of the practical part is the building model itself and simplified building documentation created from it.
7

Point Cloud-Based Analysis and Modelling of Urban Environments and Transportation Corridors

Yun-Jou Lin (5929979) 03 January 2019 (has links)
3D point cloud processing has been a critical task due to the increasing demand of a variety of applications such as urban planning and management, as-built mapping of industrial sites, infrastructure monitoring, and road safety inspection. Point clouds are mainly acquired from two sources, laser scanning and optical imaging systems. However, the original point clouds usually do not provide explicit semantic information, and the collected data needs to undergo a sequence of processing steps to derive and extract the required information. Moreover, according to application requirements, the outcomes from the point cloud processing could be different. This dissertation presents two tiers of data processing. The first tier proposes an adaptive data processing framework to deal with multi-source and multi-platform point clouds. The second tier introduces two point clouds processing strategies targeting applications mainly from urban environments and transportation corridors.<div><br></div><div>For the first tier of data processing, the internal characteristics (e.g., noise level and local point density) of data should be considered first since point clouds might come from a variety of sources/platforms. The acquired point clouds may have a large number of points. Data processing (e.g., segmentation) of such large datasets is time-consuming. Hence, to attain high computational efficiency, this dissertation presents a down-sampling approach while considering the internal characteristics of data and maintaining the nature of the local surface. Moreover, point cloud segmentation is one of the essential steps in the initial data processing chain to derive the semantic information and model point clouds. Therefore, a multi-class simultaneous segmentation procedure is proposed to partition point cloud into planar, linear/cylindrical, and rough features. Since segmentation outcomes could suffer from some artifacts, a series of quality control procedures are introduced to evaluate and improve the quality of the results.<br></div><div><br></div><div>For the second tier of data processing, this dissertation focuses on two applications for high human activity areas, urban environments and transportation corridors. For urban environments, a new framework is introduced to generate digital building models with accurate right-angle, multi-orientation, and curved boundary from building hypotheses which are derived from the proposed segmentation approach. For transportation corridors, this dissertation presents an approach to derive accurate lane width estimates using point clouds acquired from a calibrated mobile mapping system. In summary, this dissertation provides two tiers of data processing. The first tier of data processing, adaptive down-sampling and segmentation, can be utilized for all kinds of point clouds. The second tier of data processing aims at digital building model generation and lane width estimation applications.<br></div>
8

Vers des archétypes de modèles auto-configurables pour le bâtiment connecté / Towards archetypes of self-tuned models for connected buildings

Scanu, Lisa 10 November 2017 (has links)
Les bâtiments devenant de plus en plus performants énergétiquement, l'impact de l'activité humaine devient prépondérante. Afin de limiter cet impact, les bâtiments ont tout d'abord vu leur niveau d'automatisation augmenter. Toutefois, des études menées dans des bâtiments résidentiels et de bureaux ont mis en évidence que l'automatisation ne réduisait pas l'écart entre la consommation d'énergie prévue en phase de conception la consommation d'énergie réellement constatée. Afin d'atteindre une faible consommation en phase d'exploitation du bâtiment, les occupants doivent être impliqués dans la gestion d'énergie. Le travail proposé fait partie d'un projet de recherche visant à mettre en place un gestionnaire énergétique redonnant le pouvoir aux occupants via des services énergétiques. Ces services permettront à l'utilisateur de définir ses propres objectifs et le conseillera sur les meilleures actions à mettre en place pour les atteindre. Une analyse de la littérature sociologique est menée afin de permettre l'implémentation de services pertinents et favorisant de réels et durables changements de comportement. La mise en place de ces services requiert un modèle thermique et aéraulique du bâtiment faciles à configurer et ne nécessitant aucune donnée experte. Le travail présenté dans cette thèse se concentre sur l'implémentation d'un tel modèle. Cela implique de définir dans un premier temps la structure de modèle adéquate : permettant d'atteindre à la fois les précisions requises à la prédiction à horizon 24 heures tout en ne nécessitant que peu d'informations expertes. Dans un deuxième temps, il s'agit d'étudier les différentes méthodes d'estimation paramétrique répondant au cahier des charges. Des validations du modèle sont faites sur deux cas d'études réel : un bureau et un appartement. Cette thèse décrit la méthodologie nécessaire à la détermination de structures de modèles pertinentes. Ces structures doivent être génériques afin de s'adapter à la fois à des cas d'études mono et multi-zones. De plus, elles doivent se baser sur le moins de capteurs et de connaissance experte possible. / As buildings become more energy-efficient, the effect of human activities on their global consumption increases. To limit this impact, a first attempt was made to increase the level of automation in buildings. However, from surveys led in residential and office buildings, Carassus and Sidler conclude that automation does not reduce the gap between predicted and effective consumption. This work reveals that static rules can not be sufficient. In order to reach the goal of low energy consumption in the operation phase of buildings, occupants must then be involved in the energy management process. The proposed work is part of a research project focusing on a system embedding energy services with a high level of interaction to empower users with energy services. The role of these energy services is to allow users to define their own objective and consequently generate information and advice regarding the best strategies to apply on building systems (HVAC systems, sun-shading devices, windows opening,…) and envelope configuration. An analysis of the sociological literature was made in order to implement relevant services for the users, favouring real and durable changes in their behaviours. Some of these services require thermal and aeraulic behavioural models easy to set up and little expert knowledge. This thesis focuses on the development and implementation of a model relevant for energy management end-user services. It involves to deal with the definition of relevant model structures together with parameter estimation methods to tune the parameter values. The model must be simple enough to ease its set up with estimation and prediction capabilities. The limits in terms of complexity and computational time are discussed. The energy management services should be configured by occupants thus it must not require much expert knowledge. Consequently, some sensors are needed to estimate the thermal and aeraulic model. Tests have been performed to limit the needed instrumentation. Relevant model structures are discussed because they should be generic: it should adapt to both mono-zone and multi-zone case studies and it should be based on a minimal number of sensors and require little expert knowledge.
9

A Model-Driven Approach for LoD-2 Modeling Using DSM from Multi-stereo Satellite Images

Gui, Shengxi January 2020 (has links)
No description available.
10

Byggnadsmodellers anpassning inför 3D-utskift &amp; dess användning / Building model´s adjustments before 3D-printing &amp; its use

Elander, Sofia, Bolmstad, Elin January 2016 (has links)
Syfte: Att utreda hur digitala 3D-modeller bör anpassas inför utskrift i en 3D-skrivare samt undersöka hur en sådan modell kan användas i byggprocessens olika skeden. Metod: En fallstudie genomförs med en befintlig digital 3D-modell som utgångspunkt där intervjuer och action research används som datainsamlingsmetoder. Empirin jämförs och analyseras med det teoretiska ramverket som tagits fram genom litteraturstudier. Resultat: En fysisk 3D-modell skulle kunna användas i flera skeden i byggprocessen, huvudsakligen i idéskedet, produktionsskedet och genomgående processen som ett kommunikationsverktyg och vid reklam/försäljning/presentation för ökad förstående. Inför utskrift bör alla byggnadsdelar vara solida, detaljer bör raderas beroende på skala och komponenter bör bestå av samma material. Konsekvenser: Då intervjuerna utförs med personer med varierande kunskap och erfarenhet är det viktigt att beakta det faktum att förslag på användningsområden eventuellt inte är genomförbara i praktiken då dessa är önskemål. Trots detta kan användning av fysiska 3D-modeller rekommenderas i flera av byggprocessens skeden för ökad förståelse och bättre kommunikation, vilket även styrks av det teoretiska ramverket. Gällande anpassningar av en digital modell krävs en digital 3D-model som utgångspunkt och viss vana av 3D-projektering. Begränsningar: Då denna studie är en fallstudie utförd på ett specifikt fall, kan kunskap och rekommendationer inte generaliseras statistiskt på andra typer av byggnader. Dock kan resultatet i denna studie implementeras på liknande projekt om små justeringar tillämpas. På grund av det faktum att studien är kvalitativ med ett begränsat antal respondenter finns möjlighet till ett annat resultat om utförandet skett med andra förutsättningar. Nyckelord: BIM-modell, fysisk byggnadsmodell, 3D-modell, 3D-skrivare, 3D- utskrift / Purpose: To investigate how digital 3D models should be adapted to enable 3D printing for use in the construction process in its various stages. Method: A case study is conducted with an existing digital 3D-model where interviews and action research is used as a data collection method. The empirical data are compared and analyzed with the theoretical framework developed through literature studies. Findings: A physical 3D model can be used at several stages in the construction process, mainly in idea development stages, the production stage and throughout the process as a communication tool and for advertising/sales/presentation for increased understanding. Prior to printing, all parts of the building should be solid, details should be erased depending on the scale used and components should consist of the same material. Implications: Based on interviews with people with varying knowledge and experience within the subject, it is important to take into consideration the fact that the proposals on the fields of use may not be enforceable in reality since they are requests. Despite this, the use of physical 3D models can be recommended in several construction phases of the process for greater understanding and better communication, which is corroborated by the theoretical framework. Adaptions of a digital model require a digital 3D model as a prerequisite and a certain experience of 3D design. Limitations: Since this study is a case study conducted in a specific case, knowledge and recommendations cannot be generalized statistically to other types of buildings. However, with small adjustments, this study can be implemented in similar projects. Due to the fact that the study is qualitative with a limited number of interviewees, there is a possibility of a different result if the execution occurred with other conditions. Keywords: BIM model, physical building model, 3D model, 3D printer, 3D printing

Page generated in 0.0317 seconds