Fakultet for ingeniørvitenskap (IV): Nye registreringer
Viser treff 1-20 av 14520
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Improving and implementing the STEP ISO 10303 standard for design, analysis and structural test data correlation
(Doctoral theses at NTNU;2020:416, Doctoral thesis, 2020)The objective of this thesis was to improve the effectiveness of data management of physical test and simulation data, in the context of digital twins, PDM (Product Data Management)/PLM (Product Lifecycle Management) and ... -
Prototyping Cyber-Physical Systems using Wayfaring - An Experiment and Insights for Early-Stage Development
(Doctoral theses at NTNU;2020:389, Doctoral thesis, 2020)The two main aims of the thesis are firstly to qualitatively and quantitatively research the effect of using a prototype-driven wayfaring approach for the early-stage development of cyber-physical systems to give normative ... -
Investigation of a Francis turbine during speed variation: Inception of cavitation
(Peer reviewed; Journal article, 2020)Variable-speed operation of a hydro turbine is considered as an alternative option to meet fluctuating energy demand as it allows high-ramping rate. Cavitation can be a limiting factor to utilize the variable-speed technology ... -
Using ANN in emergency reconstruction projects post disaster
(Peer reviewed; Journal article, 2020)The purpose of this study is to avoid delays and cost changes that occur in emergency reconstruction projects especially in post disaster circumstances. This study is aimed to identify the factors that affect the real ... -
A hybrid kinematic controller for resilient obstacle avoidance of autonomous ships
(Peer reviewed; Journal article, 2020)Resilience is an important feature of autonomous systems. To be resilient, a control system must be stable, robust, and safe. This paper explores the use of hybrid feedback controllers to ensure robustness towards uncertainties ... -
Stochastic Reactor-Based Fuel Bed Model for Grate Furnaces
(Peer reviewed; Journal article, 2020)Biomass devolatilization and incineration in grate-fired plants are characterized by heterogeneous fuel mixtures, often incompletely mixed, dynamical processes in the fuel bed and on the particle scale, as well as heterogeneous ... -
Impact of cyber risk on the safety of the MilliAmpere2 Autonomous Passenger Ship
(Peer reviewed; Journal article, 2020)The digitalization of the maritime sector is continuously growing, leading to increased automation, such as, the development of autonomous vessels. The Autonomous Passenger Ship (APS) is a characteristic instantiation of ... -
Identification and Optimal Control for Surge and Swab Pressure Reduction While Performing Offshore Drilling Operations
(Peer reviewed; Journal article, 2020)In this paper, an unscented Kalman filter (UKF) coupled with a nonlinear model-predictive controller (NMPC) for a hydraulic wellbore model with multi-variable control and tracking is presented. In a wellbore, high drill ... -
Indicators for Sustainable Demand Risk Allocation in Transport Infrastructure Projects
(Peer reviewed; Journal article, 2020)Efficient risk allocation has been proven to be at the heart of effective and efficient infrastructure project operation. While most risks may be reasonably assigned in transport infrastructure projects, demand risk remains ... -
New approaches to solar tracking and concentration through numerical optimization of lens arrays
(Doctoral theses at NTNU;2020:405, Doctoral thesis, 2020)Solar concentrators are essential for enabling several solar energy applications, including high-efficiency photovoltaic conversion and high-temperature solar thermal energy. These concentrators require accurate solar ... -
A Novel Channel and Temporal-wise Attention in Convolutional Networks for Multivariate Time Series Classification
(Peer reviewed; Journal article, 2020)Multivariate time series classification (MTSC) is a fundamental and essential research problem in the domain of time series data mining. Recently deep neural networks emerged as an end-to-end solution for MTSC and achieve ... -
Modelica Component Models for Non-diffracting Floating Objects and Quasi-static Catenary Moorings
(Chapter, 2020)In this paper, the theory behind determining the hydrodynamic response of a floating object in the presence of waves is discussed, followed by a simplification for the case of wave-transparent objects. The Morison equation ... -
Modelica Component Models for Oceanic Surface Waves and Depth Varying Current
(Chapter, 2020)In this paper, the theory of progressive ocean-surface gravity-waves is discussed, followed by the concept of the representation of the irregular sea-state by a sea spectrum. Fourier series decomposition of the irregular ... -
Modeling of Water Age in the Drinking Water Distribution System of Trondheim Kommune
(Master thesis, 2020)Abstract: Drinking water provision is fundamental to human activities, and has major direct and indirect effects on society, economy and the environment. Drinking water quality is affected by raw water quality, as well ... -
Modelling and Experimental Study on the Production of Gas Wells with Associated Liquid
(Doctoral theses at NTNU;2020:340, Doctoral thesis, 2020)Once a gas field is developed liquid production may start and persists sometime during the production life of most dry gas wells. This liquid could be condensate, water, or both, resulting from condensate dropout due to ... -
Physical experiments on CPTU thin-layer effects of thin clay layers embedded in sand - With analysis and possible correction of cone resistance in layered profiles
(Master thesis, 2020)Abstract: The cone penetrometer is an excellent tool to characterize stratigraphy and have good abilities for parameter interpretation in homogenous soils. However, in soils with small layer thickness, in terms of cone ... -
Facilitating microplastic quantification through the introduction of a cellulose dissolution step prior to oxidation: Proof-of-concept and demonstration using diverse samples from the Inner Oslofjord, Norway
(Peer reviewed; Journal article, 2020)Identifying and quantifying microplastic in marine samples can be facilitated by removing natural organic matter (NOM). Cellulosic material, like chitin, however, are a type of NOM that is resistant to chemical digestion, ... -
A computationally efficient method for identification of steady state in time series data from ship monitoring
(Peer reviewed; Journal article, 2020)An increasing number of ships are being equipped with sensors and devices for monitoring of operational behavior, and the amount and access to operational data is gradually increasing. Due to various reasons described in ... -
Experimental and numerical study of hydrodynamic responses of a twin-tube submerged floating tunnel considering vortex-induced vibration
(Doctoral theses at NTNU;2020:392, Doctoral thesis, 2020)A pontoon-supported submerged floating tunnel (SFT) is a reasonable means crossing a fjord with large depth and width. A relevant design of such a tunnel consists of two identical tubes in a tandem configuration and suspended ... -
An Efficient Production Transfer Process
(Doctoral theses at NTNU;2020:393, Doctoral thesis, 2020)