Searched for: department%3A%22Delft%255C%2BInstitute%255C%2Bof%255C%2BApplied%255C%2BMathematics%22
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Jongbloed, G. (author), van der Meulen, F.H. (author), Pang, L. (author)
We consider the current status continuous mark model where, if an event takes place before an inspection time T a “continuous mark” variable is observed as well. A Bayesian nonparametric method is introduced for estimating the distribution function of the joint distribution of the event time (X) and mark variable (Y). We consider two...
journal article 2021
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Janssen, R. (author), Liu, Pengyu (author)
Phylogenetic networks represent evolutionary history of species and can record natural reticulate evolutionary processes such as horizontal gene transfer and gene recombination. This makes phylogenetic networks a more comprehensive representation of evolutionary history compared to phylogenetic trees. Stochastic processes for generating...
journal article 2021
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Mészáros, L. (author), van der Meulen, F.H. (author), Jongbloed, G. (author), El Serafy, G.Y.H. (author)
Spring phytoplankton blooms in the southern North Sea substantially contribute to annual primary production and largely influence food web dynamics. Studying long-term changes in spring bloom dynamics is therefore crucial for understanding future climate responses and predicting implications on the marine ecosystem. This paper aims to study...
journal article 2021
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Bodnar, Taras (author), Dette, Holger (author), Parolya, N. (author), Thorsén, Erik (author)
Optimal portfolio selection problems are determined by the (unknown) parameters of the data generating process. If an investor wants to realize the position suggested by the optimal portfolios, he/she needs to estimate the unknown parameters and to account for the parameter uncertainty in the decision process. Most often, the parameters of...
journal article 2021
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Zhou, Jia Bin (author), Bai, Yan Qin (author), Guo, Y. (author), Lin, H.X. (author)
In general, data contain noises which come from faulty instruments, flawed measurements or faulty communication. Learning with data in the context of classification or regression is inevitably affected by noises in the data. In order to remove or greatly reduce the impact of noises, we introduce the ideas of fuzzy membership functions and the...
journal article 2021
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Vittorietti, M. (author), Hidalgo Garcia, J. (author), Sietsma, J. (author), Li, W. (author), Jongbloed, G. (author)
Investigating the main determinants of the mechanical performance of metals is not a simple task. Already known physically inspired qualitative relations between 2D microstructure characteristics and 3D mechanical properties can act as the starting point of the investigation. Isotonic regression allows to take into account ordering relations...
journal article 2021
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Speleers, Hendrik (author), Toshniwal, D. (author)
In this paper, we describe a general class of C<sup>1</sup> smooth rational splines that enables, in particular, exact descriptions of ellipses and ellipsoids — some of the most important primitives for CAD and CAE. The univariate rational splines are assembled by transforming multiple sets of NURBS basis functions via so-called design...
journal article 2021
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Wang, Zhijie (author), Zhai, Qingqing (author), Chen, P. (author)
The performance of units in the same batch can exhibit considerable heterogeneity due to the variation in the raw materials and fluctuation in the manufacturing process. For products suffering performance degradation in their use, such heterogeneity often results in an increase in the dispersion of the degradation paths of units in a...
journal article 2021
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Le, Hoang Anh (author), Lambrechts, Jonathan (author), Ortleb, Sigrun (author), Gratiot, Nicolas (author), Deleersnijder, E.L.C. (author), Soares-Frazão, Sandra (author)
The accurate simulation of wetting–drying processes in floodplains and coastal zones is a challenge for hydrodynamic modelling, especially for long time simulations. Indeed, dedicated numerical procedures are generally time-consuming, instabilities can occur at the wet/dry front, rapid transition of wet/dry interface and mass conservation are...
journal article 2020
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Groot, K.J. (author), Schuttelaars, H.M. (author)
The initial stage of the laminar–turbulent transition of semi-infinite flows can be characterized as either an absolute or convective instability, naturally associated with localized wave packets. A convective instability is directly linked to an absolute instability in a different reference frame. Therefore, our aim is to determine the...
journal article 2020
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Möller, M. (author), Jaeschke, Andrzej (author)
High-performance computing platforms are becoming more and more heterogeneous, which makes it very difficult for researchers and scientific software developers to keep up with the rapid changes on the hardware market. In this paper, the open-source project FDBB (Fluid Dynamics Building Blocks) is presented, which eases the development of...
conference paper 2020
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Mészáros, L. (author), van der Meulen, F.H. (author), Jongbloed, G. (author), El Serafy, G.Y.H. (author)
Available climate change projections, which can be used for quantifying future changes in marine and coastal ecosystems, usually consist of a few scenarios. Studies addressing ecological impacts of climate change often make use of a low- (RCP2.6), moderate- (RCP4.5) or high climate scenario (RCP8.5), without taking into account further...
journal article 2020
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Jongbloed, G. (author), Mc Garrity, K.S. (author), Sietsma, J. (author)
Kernel estimators are proposed for estimating the cumulative distribution functions and the probability density functions of several quantities of interest in a stereological oriented cylinder model. This oriented cylinder model was developed to represent anisotropic microstructural features in materials. The asymptotic properties of these...
journal article 2020
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Van Dorp, I. N. (author), Leegwater, A. J. (author), Alberink, I. (author), Jongbloed, G. (author)
In the so-called rare type match problem, the discrete characteristics of a crime stain have not been observed in the set of background material. To assess the strength of evidence, two competing statistical hypotheses need to be considered. The formulation of the hypotheses depends on whichidentification of source question is of interest ...
journal article 2020
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van Mill, J. (author)
Editorial
contribution to periodical 2019
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Kool, Fréderique Suzanne (author), van Dorp, I. (author), Bolck, Annabel (author), Leegwater, Anna Jeannette (author), Jongbloed, G. (author)
In the evaluation of measurements on characteristics of forensic trace evidence, Aitken and Lucy (2004) model the data as a two-level model using assumptions of normality where likelihood ratios are used as a measure for the strength of evidence. A two-level model assumes two sources of variation: the variation within measurements in a group ...
review 2019
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Velthoen, J.J. (author), Cai, J. (author), Jongbloed, G. (author), Schmeits, Maurice (author)
Aiming to estimate extreme precipitation forecast quantiles, we propose a nonparametric regression model that features a constant extreme value index. Using local linear quantile regression and an extrapolation technique from extreme value theory, we develop an estimator for conditional quantiles corresponding to extreme high probability...
journal article 2019
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Mészáros, L. (author), van der Meulen, F.H. (author), Jongbloed, G. (author), El Serafy, G.Y.H. (author)
Traditionally, quantifying climate change induced uncertainty in ecological indicators requires stochastic simulation with a chain of physically-based models describing various processes such as hydrodynamics, waves, sediment transport and ecology. Such Monte Carlo based simulation on the entire model chain, especially with large sample size, is...
abstract 2018
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el Bouhaddani, S. (author), Uh, Hae-Won (author), Jongbloed, G. (author), Hayward, Caroline (author), Klarić, Lucija (author), Kielbasa, Szymon M. (author), Houwing-Duistermaat, Jeanine (author)
Background: With the exponential growth in available biomedical data, there is a need for data integration methods that can extract information about relationships between the data sets. However, these data sets might have very different characteristics. For interpretable results, data-specific variation needs to be quantified. For this task,...
journal article 2018
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Roth, Martin (author), Jongbloed, G. (author), Buishand, Adri (author)
The generalized Pareto distribution (GPD) is often used in the statistical analysis of climate extremes. For a sample of independent and identically distributed observations, the parameters of the GPD can be estimated by the maximum likelihood (ML) method. In this paper, we drop the assumption of identically distributed random variables. We...
journal article 2018
Searched for: department%3A%22Delft%255C%2BInstitute%255C%2Bof%255C%2BApplied%255C%2BMathematics%22
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