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Anastasopol, A. (author), Eijt, S.W.H. (author), Schut, H. (author), Mulder, F.M. (author), Plazaola, F. (author), Dam, B. (author)Mg-Ti compounds are attractive candidates as hydrogen storage materials for their fast sorption kinetics and high storage capacity. In this context, an investigation of their thermal stability is of great importance. The thermal stability of MgyTi1-y thin films was investigated using positron annihilation spectroscopy. Despite the positive...journal article 2012
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Sun, L.G. (author), De Visser, C.C. (author), Chu, Q.P. (author), Mulder, J.A. (author)The optimality of the kernel number and kernel centers plays a significant role in determining the approximation power of nearly all kernel methods. However, the process of choosing optimal kernels is always formulated as a global optimization task, which is hard to accomplish. Recently, an algorithm, namely improved recursive reduced least...journal article 2012
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- Mulder, R. (author) conference paper 2012
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- Mulder, A. (author) book 2012
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- Wagemaker, M. (author), Singh, D.P. (author), George, A. (author), Ten Elshof, J.E. (author), Mulder, F.M. (author) conference paper 2012
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Mulder, J. (author), Taal, M. (author), Tangelder, M. (author), Jansen, H. (author), Henkes, R. (author), Werners, S. (author)In deze studie wordt de ontwikkelingen in de sedimenthuishouding als uitgangspunt beschouwd voor duurzame inrichting van de ZW Delta. Centraal staan de kansen van een sedimentstrategie: het gericht beïnvloeden van de sedimenthuishouding, met het oog op het bereiken van een of meer (beleids)doelen. Kijkend naar de ontwikkelingen in de...report 2012
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Yu, H. (author), Mulder, J.A. (author)This work concentrates on the development of an optimization technique which is capable of minimizing the noise impact of an arriving aircraft by optimizing its flight trajectory. Actions needed from pilots to gradually establish the landing configuration are considered because it is expected that the pilot workload throughout this phase should...conference paper 2012
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Mulder, W.A. (author)Since most of the easy hydrocarbon reservoirs have been found, accurate sub-surface imaging for oil and gas exploration and production is crucial. Seismic data can provide a band-limited reconstruction of impedance contrasts between different rock formations as well as a subsurface velocity model. Current compute power allows for the use of the...conference paper 2012
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- Abdul Rahman, S.M.B. (author), Borst, C. (author), Mulder, M. (author), Van Paassen, M.M. (author) book chapter 2012
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Moradi Tehrani, A. (author), Slob, E.C. (author), Mulder, W. (author)Frequency-to-time transformations are of interest to controlled-source electromagnetic methods when time-domain data are inverted for a subsurface resistivity model by numerical frequency-domain modeling at a selected, small number of frequencies whereas the data misfit is determined in the time domain. We propose an efficient, Prony-type method...journal article 2012
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- Goos, J. (author), Boersma, A.J. (author), Mulder, A. (author), Zlatanova, S. (author) conference paper 2012
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Minisini, S. (author), Mulder, W.A. (author), Zhebel, E. (author), Kononov, A. (author)Abstract only.conference paper 2012
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Wirianto, M. (author), Mulder, W.A. (author), Slob, E.C. (author)In the application of controlled source electromagnetics for reservoir monitoring on land, the timelapse signal measured with a surface-to-surface acquisition can reveal the lateral extent on the surface of resistivity changes at depth in a hydrocarbon reservoir under production. However, a direct interpretation of the time-lapse signal may...conference paper 2012
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Kazei, V.V. (author), Ponomarenko, A.V. (author), Troyan, V.N. (author), Kashtan, B.M. (author), Mulder, W.A. (author)Full waveform inversion suffers from local minima, due to a lack of low frequencies in the data. A reflector below the zone of interest may, however, help in recovering the long-wavelength components of a velocity perturbation, as demonstrated in a paper by Mora. With the Born approximation for the perturbation in a reference model consisting of...conference paper 2012
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Zhebel, E. (author), Minisini, S. (author), Mulder, W.A. (author)We solve the three-dimensional acoustic wave equation, discretized on tetrahedral meshes. Two methods are considered: mass-lumped continuous finite elements and the symmetric interior-penalty discontinuous Galerkin method (SIP-DG). Combining the spatial discretization with the leap-frog time-stepping scheme, which is second-order accurate and...conference paper 2012
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Zhebel, E. (author), Minisini, S. (author), Kononov, A. (author), Mulder, W.A. (author)The finite-difference method is widely used for time-domain modelling of the wave equation because of its ease of implementation of high-order spatial discretization schemes, parallelization and computational efficiency. However, finite elements on tetrahedral meshes are more accurate in complex geometries near sharp interfaces. We compared the...conference paper 2012
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Kononov, A. (author), Minisini, S. (author), Zhebel, E. (author), Mulder, W.A. (author)Finite-element modelling of seismic wave propagation on tetrahedra requires meshes that accurately follow interfaces between impedance contrasts or surface topography and have element sizes proportional to the local velocity. We explain a mesh generation approach by example. Starting from a finite-difference representation of the velocity model,...conference paper 2012
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Minisini, S. (author), Zhebel, E. (author), Kononov, A. (author), Mulder, W.A. (author)The spreading adoption of computationally intensive techniques such as Reverse Time Migration and Full Waveform Inversion increases the need of efficiently solving the three-dimensional wave equation. Common finite-difference discretization schemes lose their accuracy and efficiency in complex geological settings with discontinuities in the...conference paper 2012
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Ngan-Tillard, D.J.M. (author), Engin, H.K. (author), Verwaal, W. (author), Mulder, A. (author), Ulusay, R. (author), Erguler, Z.A. (author)The needle penetrometer (NP) is a nondestructive, cheap and simple device which can be used indirectly to obtain the uniaxial compressive strength of extremely weak rocks. It requires little sample preparation and can be used in the field and laboratory and applied in natural and man-made structures where sampling is not allowed. The...journal article 2012
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Kavian, M. (author), Slob, E.C. (author), Mulder, W.A. (author)Macroscopic measurements of electrical resistivity require frequency-dependent effective models that honor the microscopic effects observable in macroscopic measurements. Effective models based on microscopic physics exist alongside with empirical models. We adopted an empirical model approach to modify an existing physical model. This provided...journal article 2012