Searched for: subject:"Principal%5C+component%5C+analysis"
(1 - 20 of 26)

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Krishnakumari, P.K. (author), van Lint, J.W.C. (author), Djukic, T. (author), Cats, O. (author)
The fundamental challenge of the origin-destination (OD) matrix estimation problem is that it is severely under-determined. In this paper we propose a new data driven OD estimation method for cases where a supply pattern in the form of speeds and flows is available. We show that with these input data, we do not require an iterative dynamic...
journal article 2020
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Pinel, I.S.M. (author), Kim, Lan Hee (author), Proença Borges, Vitor R. (author), Farhat, Nadia M. (author), Witkamp, Geert Jan (author), van Loosdrecht, Mark C.M. (author), Vrouwenvelder, J.S. (author)
Phosphate limitation has been suggested as a preventive method against biofilms. P-limited feed water was studied as a preventive strategy against biofouling in cooling towers (CTs). Three pilot-scale open recirculating CTs were operated in parallel for five weeks. RO permeate was fed to the CTs (1) without supplementation (reference), (2)...
journal article 2020
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Liu, Jing (author), Zheng, Fangfang (author), van Zuylen, H.J. (author), Li, Jie (author)
OD flows provide important information for traffic management and planning. The prediction of dynamic OD matrices gives the possibility to apply anticipatory traffic management measures. In this paper, we propose an OD prediction approach based on the data obtained by Automated Number Plate Recognition (ANPR) cameras. The principal component...
journal article 2020
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Machidon, Alina L. (author), Machidon, Octavian M. (author), Ciobanu, C.B. (author), Ogrutan, Petre L. (author)
Remote sensing data has known an explosive growth in the past decade. This has led to the need for efficient dimensionality reduction techniques, mathematical procedures that transform the high-dimensional data into a meaningful, reduced representation. Projection Pursuit (PP) based algorithms were shown to be efficient solutions for...
journal article 2020
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van Helmond, W. (author), Begieneman, Mark P.V. (author), Kniest, Roos (author), de Puit, M. (author)
Traces of condom lubricants in fingerprints can be valuable information in cases of sexual assault. Ideally, not only confirmation of the presence of the condom but also determination of the type of condom brand used can be retrieved. Previous studies have shown to be able to retrieve information about the condom brand and type from...
journal article 2019
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Gedikli, Ersegun Deniz (author), Nord, Torodd Skjerve (author), Hendrikse, H. (author), Ziemer, Gesa (author)
Pressures at the ice-structure interface during model-scale ice-structure interaction are often measured with tactile sensors. Resulting datasets usually include large volume of data along with some measurement error and noise; therefore, it is inherently hard to extract the hidden fluctuating pressures in the system. Identifying the...
journal article 2019
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Aydin, B.E. (author), Hagedooren, Hugo (author), Rutten, M.M. (author), Delsman, Joost (author), Essink, Gualbert H.P.Oude (author), van de Giesen, N.C. (author), Abraham, E. (author)
We present a systematic approach for salinity sensor placement in a polder network, where the objective is to estimate the unmeasured salinity levels in the main polder channels. We formulate this problem as optimization of the estimated salinity levels using root mean square error (RMSE) as the "goodness of fit" measure. Starting from a...
journal article 2019
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Konstantelos, Ioannis (author), Sun, Mingyang (author), Tindemans, S.H. (author), Issad, Samir (author), Panciatici, Patrick (author), Strbac, Goran (author)
The increasing uncertainty that surrounds electricity system operation renders security assessment a highly challenging task; the range of possible operating states expands, rendering traditional approaches based on heuristic practices and ad hoc analysis obsolete. In turn, machine learning can be used to construct surrogate models...
journal article 2019
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Daniel, D. (author), Pande, S. (author), Rietveld, L.C. (author)
Household water treatment (HWT) is a simple technology to tackle this issue of non-potable drinking water at household level. Unfortunately, studies have showed that people do not use it regularly which diminishes the impact of HWT on health.
poster 2019
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Sánchez-Aparicio, Luis Javier (author), Herrero Huerta, M. (author), Esposito, R. (author), Schipper, H.R. (author), González-Aguilera, Diego (author)
This paper proposes a photogrammetric procedure able to determine out-of-plane movements experienced by a masonry structure subjected to a quasi-static cyclic test. The method tracks the movement of circular targets by means of a coarse-to-fine strategy. These targets were captured by means of a photogrammetric network, made up of four...
journal article 2019
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Nishitsuji, Y. (author), Marín, Luis Franco (author), Gomez, Martín (author), Rowe, C.A (author), Draganov, D.S. (author)
No conclusive evidence has been presented to date for tectonic tremor (TT) in the vicinity of central Chile, where the Nazca Plate is subducting beneath the South American Plate. Subduction in our experimental location (roughly 35.5° S, 70.5° W) is steep and fairly unobstructed compared to the flattened and more seismogenic behavior to the north...
journal article 2019
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Snellen, M. (author), Gaida, T.C. (author), Koop, L. (author), Alevizos, Evangelos (author), Simons, D.G. (author)
Obtaining an overview of the spatial and temporal distribution of seabed sediments is of high interest for multiple research disciplines. Multibeam echosounders allow for the mapping of seabed sediments with high area coverage. In this paper, the repeatability of acoustic classification derived from multibeam echosounder backscatter is addressed...
journal article 2018
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Kang, Z. (author), Yang, Juntao (author), Zhong, Ruofei (author), Wu, Yongxing (author), Shi, Zhenwei (author), Lindenbergh, R.C. (author)
The digital mapping of road environment is an important task for road infrastructure inventory and urban planning. Automatic extraction and classification of pole-like objects can remarkably reduce mapping cost and enhance work efficiency. Therefore, this paper proposes a voxel-based method that automatically extracts and classifies three...
journal article 2018
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Polfliet, Mathias (author), Klein, S. (author), Huizinga, W. (author), Paulides, Margarethus M. (author), Niessen, W.J. (author), Vandemeulebroucke, Jef (author)
Image registration is an important task in medical image analysis. Whereas most methods are designed for the registration of two images (pairwise registration), there is an increasing interest in simultaneously aligning more than two images using groupwise registration. Multimodal registration in a groupwise setting remains difficult, due to...
journal article 2018
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van Driel, B.A. (author), van den Berg, K.J. (author), Gerretzen, J. (author), Dik, J. (author)
White pigments were abundantly used in 20th century paintings, and relate to several degradation risks such as titanium white mediated photocatalytic binder degradation or zinc soap formation. Knowledge about the white pigments that were used is essential for risk assessments of 20th century collections. In this study, a representative set of...
journal article 2018
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Luo, D. (author), Cats, O. (author), van Lint, J.W.C. (author)
Transit networks are complex systems in which the passenger flow dynamics are difficult to capture and understand. While there is a growing ability to monitor and record travelers' behavior in the past decade, knowledge on network-wide passenger flows, which are essentially high-dimensional multivariate data, is still limited. This paper...
conference paper 2017
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Garufo, A. (author), Carluccio, G. (author), Freeman, Joshua R. (author), Bacon, David R. (author), Llombart Juan, N. (author), Davies, Alexander G. (author), Neto, A. (author)
In this paper a rigorous electromagnetic characterization of the setup for measuring the THz power radiated by pulsed photoconductive antenna is discussed. Such characterization is expressed in terms of efficiencies which quantify how much power is lost in the coupling between the various components involved in the measurement setup. The...
conference paper 2017
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Palma, David (author), Montessoro, Pier Luca (author), Giordano, G. (author), Blanchini, Franco (author)
Most of the existing techniques for palmprint recognition rely on metrics, typically based on static functions, which evaluate the distance between a pair of features. In this paper, we propose a new technique for palmprint verification based on a dynamical system approach for principal palm lines matching. The proposed dynamic algorithm is...
journal article 2017
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Lopez Lena Estrada, R. (author)
In almost every field of applied science and engineering, dynamical models are widely used as a professional tool to describe in a compact format the scientific knowledge we have about the phenomena we are analyzing. Such models are widely used for the estimation, optimization, detection of failures and even for real-time control. The relevance...
doctoral thesis 2016
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Budiarto, E. (author)
Radiotherapy is one of the methods used to treat cancer. One common approach for radiotherapy is exposing the patient to external beams of high-energy X-ray photons. Using the intensity-modulated radiation therapy (IMRT) technique, the fluence (radiation energy per unit area) of the radiation beams can be modulated to optimally shape the 3D high...
doctoral thesis 2015
Searched for: subject:"Principal%5C+component%5C+analysis"
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