Faculty of Engineering and Science: Recent submissions
Now showing items 1-20 of 3222
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Online Topology Identification From Vector Autoregressive Time Series
(Peer reviewed; Journal article, 2020)Causality graphs are routinely estimated in social sciences, natural sciences, and engineering due to their capacity to efficiently represent the spatiotemporal structure of multi-variate data sets in a format amenable for ... -
Data driven approach for the management of wind and solar energy integrated electrical distribution network with high penetration of electric vehicles
(Peer reviewed; Journal article, 2023)With the increased penetration of fluctuating renewables and growing population of contemporary loads such as electric vehicles, the uncertainties in the generation and demand in the electric power grids are increasing. ... -
Online Hyperparameter Search Interleaved with Proximal Parameter Updates
(Chapter, 2020)There is a clear need for efficient hyperparameter optimization (HO) algorithms for statistical learning, since commonly applied search methods (such as grid search with N-fold cross-validation) are inefficient and/or ... -
Membrane electrode assemblies for anion exchange membrane water electrolysers
(Doctoral dissertations at University of Agder;no. 479, Doctoral thesis, 2024)Membrane electrode assemblies for anion exchange membrane water electrolysers Developing technologies that may reduce our climate impact is always beneficial, though our current climate issues render the advancement of ... -
Accurate Graph Filtering in Wireless Sensor Networks
(Peer reviewed; Journal article, 2020)Wireless sensor networks (WSNs) are considered as a major technology enabling the Internet-of-Things (IoT) paradigm. The recent emerging graph signal processing field can also contribute to enabling the IoT by providing ... -
Enabling Soft Frequency Reuse and Stienen's Cell Partition in Two-Tier Heterogeneous Networks: Cell Deployment and Coverage Analysis
(Peer reviewed; Journal article, 2020)Heterogeneous cellular networks (HetNets) are one of the key enabling technologies for fifth generation (5 G) networks. In HetNets, the use of small base stations (SBSs) inside the coverage area of a macro base station ... -
Sensitivity Analysis Of Online Oil Quality Monitoring For Early Detection Of Water Ingress In Marine Propulsion Systems
(Peer reviewed; Journal article, 2020)Gearboxes are critical equipment in the vessel propulsion system. Lubrication contamination caused by water ingress or condensation is one of the major failure modes in marine gearboxes leading to accelerated aging of ... -
Practice for determining friction in hydraulic winch systems
(Peer reviewed; Journal article, 2020)This paper presents a method for estimating friction in hydraulic active heave compensated (AHC) offshore winches. The method is a two-step approach where the first step is to model the friction loss in the hydraulic motors ... -
Achieving Ultra Energy-efficient and Collision-free Data Collection in Wake-up Radio Enabled mIoT
(Chapter, 2020)To achieve ultra-low energy consumption and decade-long battery lifetime for Internet of things (IoT) networks, wake-up radio (WuR) appears as an eminent solution. While keeping devices in deep sleep for most of the time, ... -
Dissipation in suspension system augmented by piezoelectric stack: port-Hamiltonian approach
(Chapter, 2020)Analysis of damping in semi-active and active suspension systems is prerequisite for an advanced control and, eventually, energy harvesting functions. This paper addresses the damping in suspension system augmented by the ... -
Pressure-flow dynamics with semi-stable limit cycles in hydraulic cylinder circuits
(Chapter, 2021)In hydraulic circuits of the standard fluid-power actuators and mechanisms, like the linear-stroke cylinders, some hydrodynamic effects are often neglected. It happens mainly due to their complexity and secondariness in ... -
Autonomous mooring towards autonomous maritime navigation and offshore operations
(Chapter, 2020)Bollard is a vital component of mooring system. It is the anchor point for mooring ropes to be fixed in order to secure the vessel or ship. An algorithm that translates the segmented mask of bollard output from masked R-CNN ... -
The modelling cycle as analytic research tool and how it can be enriched beyond the cognitive dimension
(Chapter, 2022)The modelling cycle is a theoretical construct frequently applied in research studies on mathematical modelling. On the one hand, the modelling cycle highlights essential aspects of modelling, which makes it a tool for ... -
Bringing Nordic mathematics education into the future. Proceedings of Norma 20, The ninth Nordic Conference on Mathematics Education
(Skrifter från Svensk förening för matematikdidaktisk forskning;, Book, 2022)This volume presents Nordic mathematics education research, which will be presented at the Ninth Nordic Conference on Mathematics Education, NORMA 20, in Oslo, Norway, in June 2021. The theme of NORMA 20 regards what it ... -
Fast Graph Filters for Decentralized Subspace Projection
(Peer reviewed; Journal article, 2020)A number of inference problems with sensor networks involve projecting a measured signal onto a given subspace. In existing decentralized approaches, sensors communicate with their local neighbors to obtain a sequence of ... -
Steady state counterbalance valve modeling with the inuence of synthetic ester oils using CFD
(Peer reviewed; Journal article, 2020)This study looks in details at the effects of synthetic esters being applied to a counterbalance valve from the perspective of a system engineer. There is limited literature on the subject of applied synthetic esters and ... -
The Recombination Parameter γ : Modeling and Comments
(Journal article; Peer reviewed, 2023)The recombination parameter γ appears in mathematical expressions for the temperature coefficient of solar cells. This work presents a new analytical expression for this parameter. The expression is derived assuming that ... -
Experimental Evaluation of Homogeneous Differentiators Applied to Hydraulic Stroke with Measurement Noise and Acceleration Disturbance
(Chapter, 2024)The design and experimental evaluation of continuous homogeneous differentiators are considered. The differentiator gains follow the high-gain setup with variable gain-scaling parameter L. This parameter results from a ... -
Explainable Tsetlin Machine Framework for Fake News Detection with Credibility Score Assessment
(Journal article, 2022)The proliferation of fake news, i.e., news intentionally spread for misinformation, poses a threat to individuals and society. Despite various fact-checking websites such as PolitiFact, robust detection techniques are ... -
Bollard Segmentation and Position Estimation From Lidar Point Cloud for Autonomous Mooring
(Peer reviewed; Journal article, 2021)This article presents a computer-aided object detection and localization method from lidar 3-D point cloud data. This topic of interest is in the framework of autonomous mooring, where the ship is tied to the rigid structure ...