Browsing by Subject "numerical model"
Now showing items 1-20 of 54
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Active control of wind turbines through varying blade tip sweep
(2019)In this research work an introduction to the concept of an actively controlled horizontal axis wind turbine through varying blade tip sweep, is presented. The concept refers to variable tip swept rotor blades, that have ... -
Adaptive Bayesian Inference Framework for Joint Model and Noise Identification
(2022)Model updating, the process of inferring a model from data, is prone to the adverse effects of modeling error, which is caused by simplification and idealization assumptions in the mathematical models. In this study, an ... -
Advances in mathematical modelling of biofilm structures
(2007)Biofilms are found everywhere in natural waters forming complex microbial communities, playing an important role in ecosystem processes in streams and lakes and making their characterization a major research question. ... -
Assessing the efficiency of small-scale and bottom trawler vessels in Greece
(2016)This study explores the technical and scale efficiency of two types of Greek fishing vessels, small-scale vessels and bottom trawlers, using a bias-corrected input-oriented Data Envelopment Analysis model. Moreover, the ... -
Assessment of natural and anthropogenic impacts in groundwater, utilizing multivariate statistical analysis and inverse distance weighted interpolation modeling: the case of a Scopia basin (Central Greece)
(2018)In Scopia basin, central Greece, a hydrochemical investigation was completed. Groundwater samples from 41 sites were used to assess the natural and anthropogenic impacts in groundwater, utilizing the principal component ... -
The asymmetric impact of human capital on economic growth
(2021)This paper re-examines the effect of human capital on countries’ economic growth paths. It investigates the significance and the asymmetric impact of human capital stock on economic growth. We apply both a nonparametric ... -
Bending and buckling of internally-pressurized steel lined pipes
(2019)During offshore installation, steel lined pipes are subjected to severe plastic bending, resulting in detachment of the thin-walled liner pipe from the outer pipe and eventually, the formation of local buckling in the form ... -
Bouncing Back from Extreme Weather Events: Some Preliminary Findings on Resilience Barriers Facing Small and Medium-Sized Enterprises
(2018)Extreme weather events (EWEs) pose unprecedented threats to modern societies and represent a much-debated issue strongly interlinked with current development policies. Small and medium-sized enterprises (SMEs), which ... -
A chance-constrained based stochastic dynamic traffic assignment model: Analysis, formulation and solution algorithms
(2006)This paper is concerned with the system optimum-dynamic traffic assignment (SO-DTA) problem when the time-dependent demands are random variables with known probability distributions. The model is a stochastic extension of ... -
Circular bio-economy via energy transition supported by Fuzzy Cognitive Map modeling towards sustainable low-carbon environment
(2020)Several energy transition plans attempt to establish low-carbon practices towards a circular bio-economy in order to reduce greenhouse gas emissions. However, most actions only try to assuage the impacts of climate change ... -
A combined numerical/experimental prediction method for urban railway vibration
(2017)Railway-induced ground vibrations can cause negative effects to people/structures located in urban areas. One of the main sources of these vibrations is from the large vehicle forces generated when train wheels impact local ... -
Comparison of the performance of stochastic models in forecasting daily dissolved oxygen data in dam-Lake Thesaurus
(2016)This study presents the development and validation of three different stochastic models on the basis of (a) their efficiency to forecast and (b) their ability to utilize auxiliary environmental information. The three models ... -
Coupled numerical simulation of low-cycle fatigue damage in metal components
(2021)A coupled cyclic plasticity-damage model is implemented for simulating low-cycle fatigue in metal components. Constitutive relations account for J2-flow theory with nonlinear kinematic/isotropic hardening, coupled with ... -
Decomposing the price of the cruise product into tourism and transport attributes: Evidence from the Mediterranean market
(2018)The price composition of the cruise product is described by a high level of complexity, since it incorporates both tourist and transport dimensions. Despite that research on cruise sector is advancing, the international ... -
Design procedure for the modelling of jet-grout column slabs supporting deep excavations
(2018)Overlapping jet-grout columns are often used to form a grout slab at the bottom of deep excavations to support the retaining structures. Columnar geometrical imperfections, spatially varying strength and stiffness and the ... -
Effective-stress seismic analysis of a gravity multi-block quay wall
(2018)The seismic performance of an existing gravity quay wall consisting of concrete blocks is investigated using effective stress analysis. The study focuses on the effect of the uncertainty associated with the spatial variability ... -
Effects of spatial variability of soil properties and ground motion characteristics on permanent displacements of slopes
(2022)The seismic performance of earth slopes is a problem of great importance in geotechnical earthquake engineering associated with various sources of uncertainty. This research investigates the effects of two important causes ... -
Estimation of the recharging rate of groundwater using random forest technique
(2020)Accurate knowledge of the recharging rate is essential for several groundwater-related studies and projects mainly in the water scarcity regions. In this study, a comparison between different methods of soft computing-based ... -
Evaluating hotel productivity growth in Balearic and Canary islands
(2017)This article examines the productivity of hotels operating in the two main sun and sand tourism markets in Spain, the Balearic, and the Canary Islands, from 2004 to 2013. In this manner, we can evaluate the impact of the ... -
Evaluation of the AWR-WRF model configuration at high resolution over the domain of Greece
(2018)This study is a first attempt to obtain high resolution simulations of present climate in Greece, by applying dynamical downscaling using the Advanced Weather Research and Forecasting numerical model (WRF-ARW). We performed ...