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de Angelis, L. (author)
In this thesis, we explore the physics of optical singularities. We investigate them in light waves propagating randomly in a planar nanophotonic chip. With a custom-built nearfield microscope, we map the electromagnetic field resulting from the interference of these light waves. Our technique gives access to the full vectorial and complex...
doctoral thesis 2018
document
Staring, M. (author), van der Neut, J.R. (author), Wapenaar, C.P.A. (author)
We present an interferometric interpretation of the iterative Marchenko scheme including both free-surface multiples and internal multiples. Cross-correlations are used to illustrate the combination of causal and acausal events that are essential for the process of multiple removal. The first 4 steps in the scheme are discussed in detail, where...
conference paper 2016
document
Vaman, D. (author)
Terrain Referenced Navigation (TRN) refers to a form of localization in which measurements of distances to the terrain surface are matched with a digital elevation map allowing a vehicle to estimate its own position within the map. The main goal of this dissertation is to improve TRN performance through better signal processing. More...
doctoral thesis 2014
document
Boullenger, B. (author), Wapenaar, C.P.A. (author), Draganov, D.S. (author)
Seismic interferometry applied to surface reflection data (with source and receivers at the surface) allows to retrieve virtual-source gathers at the position of receivers, where no source was shot. As a result of the crosscorrelation of all primary and multiple reflections, the virtual-source gathers contain retrieved physical reflections as...
conference paper 2014
document
Draganov, D.S. (author), Ruigrok, E.N. (author), Ghose, R. (author), Mikesell, D. (author), Van Wijk, K. (author)
We propose a method for estimating the reflection coefficient of a subvertical boundary and the the quality factor of the medium between a receiver and the subvertical boundary. The method uses surface waves from transient deterministic sources and is inspired by the occurrence of non-physical arrivals in seismic-interferometry results due to...
conference paper 2014
document
Draganov, D.S. (author), Ghose, R. (author), Angelov, P. (author), Arts, R. (author)
One of the targets of time-lapse seismic monitoring of CO2 sequestration is to determine the parts of the reservoir reached by the injected CO2 and to estimate their saturation. Such information could be extracted from the time-lapse measurement using AVO or impedance information. But non-repeatability of the source positions and time-lapse...
journal article 2013
document
Aarts, A.L.F. (author), Langeveld, J.G. (author), Ten Veldhuis, J.A.E. (author), Rietveld, L.C. (author)
Since the initiation of environmental legislation, monitoring campaigns have been done to estimate the characteristic pollutant concentrations of combined sewer overflow water. Such local campaigns are expensive due to the large number of events which should ideally be followed. This study focused on whether available concentration ranges from...
conference paper 2013
document
Broersen, P.M.T. (author)
The sample autocorrelation function is defined by the mean lagged products (LPs) of random observations. It is the inverse Fourier transform of the raw periodogram. Both contain the same information, and the quality of the full-length sample autocorrelation to represent random data is as poor as that of a raw periodogram. The autoregressive (AR)...
journal article 2009
document
Papaefthymiou, G. (author), Kurowicka, D. (author)
The increasing penetration of renewable generation in power systems necessitates the modeling of this stochastic system infeed in operation and planning studies. The system analysis leads to multivariate uncertainty analysis problems, involving non-Normal correlated random variables. In this context, the modeling of stochastic dependence is...
journal article 2009
document
Lewandowski, D. (author)
doctoral thesis 2008
document
Karimi Nejadasl, F. (author), Gorte, B.G.H. (author), Snellen, M.M. (author), Hoogendoorn, S.P. (author)
In this paper, we address the registration of two images as an optimization problem within indicated bounds. Our contribution is to identify such situations where the optimum value represents the real transformation parameters between the two images. Consider for example Mean Square Error (MSE) as the energy function: Ideally, a minimum in MSE...
conference paper 2008
document
Ellenbroek, M.H.M. (author), de Boer, A. (author)
Fokker Space and Systems and the National Aerospace Laboratory NLR performed a study to integrate more systematically the experimental and analytical analysis of the dynamic behaviour of structures. The study focused on the correlation of experimental and analytical data, matrix and parameter updating methods. In this paper an overview will be...
report 1993
document
Noback, R. (author)
The Deterministic Power-Spectral-Density method can be derived from the Design Envelope Analysis of the continuous P.S.D.-method. It provides a method to determine a deterministic function that gives a maximum response equal to the P.S.D.-design load for linear systems. The P.S.D.-design load is undefined for nonlinear systems. In this report a ...
report 1992
document
Pasmanter, R.A. (author)
The interest in correlation-function techniques shown by a number of groups working at the RWS is mainly due to the two following reasons: 1) Boundary-values determination and 2) Prediction. For these reasons, preliminary studies were undertaken some time ago at RWS. As part of these studies, correlation functions between a number of stations on...
report 1981
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