Searched for: faculty%3A%22Civil%255C%252BEngineering%255C%252Band%255C%252BGeosciences%22
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Berkhout, F.M.C. (author)
public lecture 1954
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Berkhout, F.M.C. (author)
Twee vragen: 1. zal het nuttige effect van de geprojecteerde nieuwe irrigatiewerken ten goede komen aan een enigszins brede laag van de bevolking of zijn uitsluitend de belangen van een kleine groep grootgrondbezitters daarmee gediend? 2. is de bevolking van een gebied, waar vroeger geen irrigatie bestond, maar waar in de naaste toekomst...
public lecture 1966
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Bilsen, F.A. (author), Soede, W. (author), Berkhout, A.J. (author)
Hearing-impaired listeners often have great difficulty understanding speech in situations with background noise (e.g., meetings, parties) . Conventional hearing aids offer insufficient directivity to significantly reduce background noise relative to the desired speech signal . Based on array techniques, microphone prototypes have been developed...
journal article 1993
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Berkhout, A.J. (author)
Until now, seismic processing has been carried out by applying inverse filters in the forward data space. Because the acquired data of a seismic survey is always discrete, seismic measurements in the forward data space can be arranged conveniently in a data matrix (P). Each column in the data matrix represents one shot record. If we represent...
journal article 2006
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Berkhout, A.J. (author), Verschuur, D.J. (author)
Current multiple-removal algorithms in seismic processing use either differential moveout or predictability. If the differential moveout between primaries and multiples is small, prediction is the only option available. In the last decade, multidimensional prediction-error filtering by weighted convolution, such as surface-related multiple...
journal article 2006
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Berkhout, A.J. (author), Verschuur, D.J. (author)
Interpolation of data beyond aliasing limits and removal of noise that occurs within the seismic bandwidth are still important problems in seismic processing. The focal transform is introduced as a promising tool in data interpolation and noise removal, allowing the incorporation of macroinformation about the involved wavefields. From a physical...
journal article 2006
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Thorbecke, J. (author), Berkhout, A.J. (author)
The common-focus-point technology (CFP) describes prestack migration by focusing in two steps: emission and detection. The output of the first focusing step represents a CFP gather. This gather defines a shot record that represents the subsurface response resulting from a focused source wavefield. We propose applying the recursive shot-record,...
journal article 2006
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Rem, P.C. (author), Van Craaikamp, H. (author), Berkhout, S.P.M. (author), Sierhuis, W. (author), Van Kooy, L.A. (author)
A method for treating bottom ash from a waste incineration plant. The invention relates in particular to a method for treating bottom ash from a domestic waste incineration plant. In accordance with the invention bottom ash having a size ranging up to 2 mm is treated by removing a previously determined component. The treatment comprises at least...
patent 2007
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Rem, P.C. (author), Berkhout, S.P.M. (author)
The invention relates to an apparatus and a method for separating a material stream consisting of several materials. The materials to be separated have different densities or density ranges, so that the material of the highest density can be discharged through a screen of the apparatus, while the material of the lowest density can be discharged...
patent 2007
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Turhan Taner, M. (author), Berkhout, A.J. (author), Treitel, S. (author), Kelamis, P.G. (author)
The statics problem, whether short wavelength, long wavelength, residual, or trim, has always been one of the more time-consuming and problematic steps in seismic data processing. We routinely struggle with issues such as poor signal-to-noise (S/N) ratio, cycle skipping, truncated refractors, wavelets with ambiguous first arrival times, etc....
journal article 2007
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Rem, P.C. (author), Berkhout, S.P.M. (author), Fraunholcz, O.N. (author)
The invention relates to a process and device for the separation of fragments of liberated ferrous scrap from not liberated ferrous scrap fragments by means of a static magnet, wherein a mixture of said liberated ferrous and not liberated ferrous fragments is fed onto a continuous conveyor belt which is driven around drums and wherein said...
patent 2008
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Berkhout, A.J. (author)
Seismic acquisition surveys are designed such that the time intervals between shots are sufficiently large to avoid the tail of the previous source response interfering with the next one (zero overlap in time). To economize on survey time and processing effort, the current compromise is to keep the number of shots to some acceptable minimum. The...
journal article 2008
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Van Veldhuizen, E.J. (author), Blacquiere, G. (author), Berkhout, A.J. (author)
Increasingly, we must deal with complex subsurface structures in seismic exploration, often resulting in poor illumination and, therefore, poor image quality. Consequently, it is desirable to take into consideration the effects of wave propagation in the subsurface structure when designing an acquisition geometry. We developed a new, model-based...
journal article 2008
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Berkhout, A.J. (author), Blacquiere, G. (author), Verschuur, D.J. (author)
Seismic surveys are designed so that the time interval between shots is sufficiently large to avoid temporal overlap between records. To economize on survey time, the current compromise is to keep the number of shots to an acceptable minimum. The result is a poorly sampled source domain. We propose to abandon the condition of nonoverlapping shot...
journal article 2009
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Rem, P.C. (author), Berkhout, S.P.M. (author), De Koning, J.R.A. (author)
A method for separating seeds of different densities in a process stream, wherein the seeds are introduced into a magnetic process fluid for the formation of the process stream, which process stream is subjected to a magnetic field for the realization of a density stratification in the process stream, such that the individual seeds in the...
patent 2009
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Berkhout, S.P.M. (author), Rem, P.C. (author)
The invention relates to a separation-apparatus (1) for separating from a particle-stream (4) at least a first fraction with particles (3) of a first group of dimensions, and a second fraction with particles (3) of a second group of dimensions, comprising an infeed-device (2) for the particle-stream (4), a rotatable drum (5) having at its...
patent 2009
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Rem, P.C. (author), Berkhout, S.P.M. (author)
Method for separating a non-ferrous metal-comprising fraction from ferrous scrap, wherein the ferrous scrap is conveyed to a processing device for separating the non-ferrous metal-comprising fraction from the remainder of the ferrous scrap. The processing device supplies a beam of water, and the ferrous scrap is conveyed and released into the...
patent 2010
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Rem, P.C. (author), Berkhout, S.P.M. (author)
Using of an apparatus for separating magnetic pieces of scrap-material of a first group from magnetic pieces of scrap- material of a second group, wherein a mixture of pieces of scrap-material from the first group and from the second group is collectively transported with a conveyor to a separating zone, in which separating zone the pieces or...
patent 2010
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Rem, P.C. (author), Berkhout, S.P.M. (author)
A method and apparatus for separating solid particles of different densities, using a magnetic process fluid. The solid particles are thoroughly mixed in a small partial flow of the process fluid. The small turbulent partial flow is added to a large laminar partial flow of the process fluid, after which the obtained mixture of the respective...
patent 2011
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Berkhout, A.J. (author), Blacquiere, G. (author), Verschuur, D.J. (author)
In traditional seismic surveys, the firing time between shots is such that the shot records do not interfere in time. However, in the concept of blended acquisition, the records do overlap, allowing denser source sampling and wider azimuths in an economic way. A denser shot sampling and wider azimuths make that each subsurface gridpoint is...
journal article 2012
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