Searched for: subject:"tracking"
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van Noort, Bob (author)
Saturn's largest natural satellite, Titan, is an icy moon expected to harbour a liquid sub-surface water ocean capable of habiting extra-terrestrial life. The spherical harmonic expansion of the gravity field and the tidal Love number k2 can be used to estimate densities, depths, and phases of different layers from Titan’s interior structure,...
master thesis 2021
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van Zwieteren, Raymond (author)
The past decade has seen a rise in ability to collect, store and manage large amounts of data. With data becoming increasingly available to businesses, organizations are looking to new ways to gain insight into their activities. Acquired information can help transportation companies to cope with industry trends of expanded competition, the...
master thesis 2021
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Shen, C. (author), Dollevoet, R.P.B.J. (author), Li, Z. (author)
We propose to combine a physics-based finite element (FE) track model and a data-driven Gaussian process regression (GPR) model to directly infer railpad and ballast stiffness from measured frequency response functions (FRF) by field hammer tests. Conventionally, only the rail resonance and full track resonance are used as the FRF features to...
journal article 2021
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Wang, Haoyu (author), Berkers, Jos (author), van den Hurk, Nick (author), Layegh, Nasir Farsad (author)
To ensure railway operations safe, track geometry parameters, e.g., track gauge, are usually inspected using track geometry cars. The measurement frequency of track geometry cars is low (twice per year) due to high operational costs and track possession. An innovative way to perform track inspection at high frequency and affordable cost is...
journal article 2021
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Maljaars, J.M. (author), Richardson, Chris N. (author), Sime, Nathan (author)
This paper introduces LEOPART, an add-on for the open-source finite element software library FENICS to seamlessly integrate Lagrangian particle functionality with (Eulerian) mesh-based finite element (FE) approaches. LEOPART- which is so much as to say: ‘Lagrangian–Eulerian on Particles’ - contains tools for efficient, accurate and scalable...
journal article 2021
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Ahmad, J.I. (author), Dignum, Marco (author), Liu, G. (author), Medema, G.J. (author), van der Hoek, J.P. (author)
Drinking water distribution systems (DWDSs) have been thoroughly studied, but the concept of thermal energy recovery from DWDSs is very new and has been conceptualized in the past few years. Cold recovery results in a temperature increase of the drinking water. Its effects on drinking water quality and biofilm development are unclear. Hence, we...
journal article 2021
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Shi, Can (author), Zhao, Chunfa (author), Yang, Yang (author), Guo, Y. (author), Zhang, Xu (author)
Railway ballasted track stiffness is an important indicator to identify supporting condition that ensures that the facility is well designed and functioned. Although many studies have been performed on track stiffness based on experimental tests and finite-element methods, the factors influencing the track stiffness have not been completely...
journal article 2021
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Guo, Y. (author), Zong, Lu (author), Markine, V.L. (author), Wang, Xinyu (author), Jing, Guoqing (author)
Lateral and longitudinal resistance of ballasted track are two main indicators for the track stability quantification. Aiming at improving the lateral and longitudinal resistance, nailed sleeper is studied with single sleeper push tests (SSPTs) and discrete element modelling (DEM). The SSPTs were applied to study how much resistance the...
journal article 2021
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Han, L. (author), Zhang, Hechen (author), Xiang, Zhongxia (author), Shang, J. (author), Anjani, S. (author), Song, Y. (author), Vink, P. (author)
BACKGROUND: The contrast between a bright computer screen and a dark ambient environment may influence comfort of the users, especially on their eyes. OBJECTIVE: The objective of this research is to identify the optimal desktop lighting for the comfortable use of the computer screen in a dark environment. METHODS: An experiment was designed...
journal article 2021
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Nawaz, Ali (author)
Though NanoSats are becoming increasingly capable of featuring active payloads, and acquiring inertial data at arcsec level precision; the payload operational duty-cycle largely remains limited by its data downlink capabilities. NanoSat laser communication terminal (LCT) promises 1 Gbps data downlink capabilities. However, LEO to ground free...
master thesis 2020
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Rademakers, R.W. (author)
The relay in short track skating is a team effort with the possibility to regain strength during the race by performing an exchange with a team member. Couples can gain time and conserve kinetic energy with a well performed exchange. However, the exchange is a difficult operation. With few studies done to find out what makes a good relay...
master thesis 2020
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Suresha Konandur, Sharanya (author)
Software maintenance is an essential and time-consuming task during the software development cycle. Readability of test code is a crucial element for performing programming tasks, such as testing, bug fixing and maintaining code. Hence poorly written tests are difficult to maintain and lose their value to developers. In order to overcome this...
master thesis 2020
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Rajput, Pranjal (author)
Annotating a large-scale in-the-wild person re-identification dataset especially of marathon runners is a challenging task. The variations in the scenarios such as camera viewpoints, resolution, occlusion, and illumination make the problem non-trivial. Manually annotating bounding boxes in such large-scale datasets is cost-inefficient....
master thesis 2020
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Vollebergh, M.A.J. (author)
The construction of cyclic railway timetables is an important task for Netherlands Railways (NS).This construction can be formulated as a Periodic Event Scheduling Problem (PESP). The most powerful technique for solving cyclic railway timetabling problems is constraint programming, especially via SAT solvers when PESP instances are encoded as...
master thesis 2020
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Smit, C.O. (author)
Measuring cognitive load is essential for understanding driver performance. Under- and overload can result in dangerous situations on the road. Cognitive load can be estimated by monitoring the diameter and movements of the pupils, but during measurements external influences such as changes in light intensity affect pupil diameters. In this...
master thesis 2020
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Kelbling, Jelle (author)
The DelFly Nimble is a type of tailless flapping-wing micro air vehicles (FWMAVs) that has received an increasing amount of attention. FWMAVs show efficient and agile flight possibilities at small scale. The aerodynamics and dynamics of these flapping vehicles are challenging and not fully understood. In this work, a strategy to implement a 3D...
master thesis 2020
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de Hek, Maurits (author)
Technological innovations in the Dutch railway sector, such as ERTMS and the 3kV power supply system make it possible to increase the efficiency, effectivity and speed of the railway system in the upcoming decades. The implementation of systems such as ERTMS and 3kV is a lengthy process. The new systems will therefore operate alongside the old...
master thesis 2020
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Lugtenborg, L.A. (author)
Parkinson's disease can severely affect motor performance and impede in executing daily activities. Treatment can greatly improve patients' quality-of-life, however, disease detection and monitoring is still performed subjectively. Quantification of patients' motor performance and its decline due to increasing symptom severity using tracking...
master thesis 2020
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Fisscher, W.D. (author)
Airborne wind energy is a promising newly emerging wind energy harvesting technology. Due to low material use and high potential harvesting density it aspires to be competitor to the conventional wind turbines we see today. Kitepower bv, a company in the Netherlands, is developing a airborne wind energy system based on a flexible kite. To be...
master thesis 2020
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Wan, S. (author)
Currently, most of FMCW radar systems for target detection and localization are based on the radar system with multiple receiving antennas, but little based on the SISO system. In this project, we will show a unique signal processing pipeline based on the 8 GHz SISO FMCW radar system. An advanced algorithm of multi-target detection and tracking...
master thesis 2020
Searched for: subject:"tracking"
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