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Algorithms, Volume 13, Issue 5

May 2020 - 25 articles

Cover Story: Civil engineering applications are often characterized by large uncertainties regarding the material parameters. Discretization of the underlying equations is typically done by means of the Galerkin finite element method. The uncertain material parameter can then be expressed as a random field represented by means of a Karhunen–Loève expansion. Computation of the stochastic responses remains very costly, even when state-of-the-art multilevel Monte Carlo is used. A significant cost reduction can be achieved by using p-refined multilevel quasi-Monte Carlo (p-MLQMC). This novel method is based on a variance reduction scheme by employing a hierarchical p-refinement discretization of the problem, which is then combined with a rank-1 lattice rule. In this work, we developed algorithms for the p-MLQMC method and benchmarked them on two model problems. View this paper
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Articles (25)

  • Article
  • Open Access
8 Citations
4,356 Views
17 Pages

22 May 2020

One of the main issues addressed in any engineering design problem is to predict the performance of the component or system as accurately and realistically as possible, taking into account the variability of operating conditions or the uncertainty on...

  • Article
  • Open Access
5 Citations
4,148 Views
16 Pages

21 May 2020

One of the most challenging aspects of medical modalities such as Computed Tomography (CT) as well hybrid techniques such as CT/PET (Computed Tomography/Positron emission tomography) and PET/MRI is finding a balance between examination time, radiatio...

  • Article
  • Open Access
5 Citations
5,060 Views
16 Pages

20 May 2020

It is very often the case that at some moment a time series process abruptly changes its underlying structure and, therefore, it is very important to accurately detect such change-points. In this problem, which is called a change-point (or break-poin...

  • Article
  • Open Access
5 Citations
5,587 Views
14 Pages

19 May 2020

Salient segmentation is a critical step in biomedical image analysis, aiming to cut out regions that are most interesting to humans. Recently, supervised methods have achieved promising results in biomedical areas, but they depend on annotated traini...

  • Article
  • Open Access
8 Citations
4,189 Views
18 Pages

The Effect of Different Deep Network Architectures upon CNN-Based Gaze Tracking

  • Hui-Hui Chen,
  • Bor-Jiunn Hwang,
  • Jung-Shyr Wu and
  • Po-Ting Liu

19 May 2020

In this paper, we explore the effect of using different convolutional layers, batch normalization and the global average pooling layer upon a convolutional neural network (CNN) based gaze tracking system. A novel method is proposed to label the parti...

  • Article
  • Open Access
14 Citations
5,575 Views
34 Pages

18 May 2020

Sequential pattern mining is a fundamental data mining task with application in several domains. We study two variants of this task—the first is the extraction of frequent sequential patterns, whose frequency in a dataset of sequential transact...

  • Review
  • Open Access
61 Citations
8,121 Views
33 Pages

Moving Deep Learning to the Edge

  • Mário P. Véstias,
  • Rui Policarpo Duarte,
  • José T. de Sousa and
  • Horácio C. Neto

18 May 2020

Deep learning is now present in a wide range of services and applications, replacing and complementing other machine learning algorithms. Performing training and inference of deep neural networks using the cloud computing model is not viable for appl...

  • Article
  • Open Access
11 Citations
4,957 Views
30 Pages

18 May 2020

Inference of chemical compounds with desired properties is important for drug design, chemo-informatics, and bioinformatics, to which various algorithmic and machine learning techniques have been applied. Recently, a novel method has been proposed fo...

  • Article
  • Open Access
5,020 Views
17 Pages

10 May 2020

Developing tools for precise quantification of brain metabolites using magnetic resonance spectroscopy (MRS) is an active area of research with broad application in non-invasive neurodegenerative disease studies. The tools are mainly developed based...

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Algorithms - ISSN 1999-4893Creative Common CC BY license