Searched for: author:"Zhang, L."
(1 - 20 of 43)

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Zhang, L. (author), Thorbecke, J.W. (author), Wapenaar, C.P.A. (author), Slob, E.C. (author)
We have developed a scheme that retrieves primary reflections in the two-way traveltime domain by filtering the data. The data have their own filter that removes internal multiple reflections, whereas the amplitudes of the retrieved primary reflections are compensated for two-way transmission losses. Application of the filter does not require...
journal article 2019
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Weppelman, I.G.C. (author), Moerland, R.J. (author), Zhang, L (author), Kruit, P. (author), Hoogenboom, J.P. (author)
Crucial for the field of ultrafast electron microscopy is the creation of sub-picosecond, high brightness electron pulses. The use of a blanker to chop the beam that originates from a high brightness Schottky source may provide an attractive alternative to direct pulsed laser illumination of the source. We have recently presented the concept...
journal article 2019
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Zhang, L. (author), Slob, E.C. (author)
We have derived a scheme for retrieving the primary reflections from the acoustic surface-reflection response by eliminating the free-surface and internal multiple reflections in one step. This scheme does not require model information and adaptive subtraction. It consists only of the reflection response as a correlation and convolution operator...
journal article 2019
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Slob, E.C. (author), Yang, B. (author), Zhang, L. (author)
poster 2019
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Zhang, L. (author)
Since the 9/11 attack in New York in 2001, a lot of attention has been paid to the protection of critical infrastructures. Chemical industries are without doubt critical infrastructures due to their extreme importance for society in combination with their vulnerability. They play important roles in modern-life society, from producing and...
doctoral thesis 2018
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Yang, M. (author), Yang, Tianliang (author), Zhang, L. (author), Lin, Jinxin (author), Qin, Xiaoqiong (author), Liao, Mingsheng (author)
Large-scale reclamation projects during the past decades have been recognized as one of the driving factors behind land subsidence in coastal areas. However, the pattern of temporal evolution in reclamation settlements has rarely been analyzed. In this work, we study the spatio-temporal evolution pattern of Linggang New City (LNC) in Shanghai...
journal article 2018
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Zhang, L. (author), Slob, E.C. (author), van der Neut, J.R. (author), Wapenaar, C.P.A. (author)
We have derived an improved reverse time migration (RTM) scheme to image the medium without artifacts arising from internal multiple reflections. This is based on a revised implementation of Marchenko redatuming using a new time-truncation operator. Because of the new truncation operator, we can use the time-reversed version of the standard...
journal article 2018
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Zhang, L. (author), Reniers, G.L.L.M.E. (author)
Protecting chemical clusters from intentional attacks has been a hot topic during the last decade. Besides intrusion security countermeasures such as cameras, entrances control etc., patrolling also fulfils an important role in the security of chemical facilities and industrial parks. Current patrolling strategies in industry are mainly...
conference paper 2018
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Zhang, L. (author), Landucci, Gabriele (author), Reniers, G.L.L.M.E. (author), Ovidi, Federica (author), Khakzad Rostami, N. (author), Zhou, Jianfeng (author)
The propagation of accidents among process units may cause amplification of accident magnitude, resulting in a domino effect chain. Several catastrophic accidents occurred in the process and chemical industry presented these features. Hence, research efforts have been given to the analysis of the domino effects in order to enhance prevention...
book chapter 2018
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Zhang, L. (author), Slob, E.C. (author)
We retrieve transmission compensated subsurface primary reflections from the reflection response measured at the surface. This is achieved by filtering the reflection response. The application of this scheme does not require model information. In this process, the reflection response is convolved and correlated with itself. The result after each...
conference paper 2018
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Zhang, L. (author), Slob, E.C. (author), Wapenaar, C.P.A. (author), van der Neut, J.R. (author)
A revised Marchenko scheme that avoids the need to compute the Green’s function is presented for artefact-free image of the subsurface with single-sided reflection response as input. The initial downgoing Green’s function which can be modelled from a macro model is needed for solving the revised Marchenko equations instead of its inverse. The...
conference paper 2018
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Qin, Xiaoqiong (author), Yang, M. (author), Zhang, L. (author), Yang, Tianliang (author), Liao, Mingsheng (author)
Since the Persistent Scatterer Synthetic Aperture Radar (SAR) Interferometry (PSI) technology allows the detection of ground subsidence with millimeter accuracy, it is becoming one of the most powerful and economical means for health diagnosis of major transportation infrastructures. However, structures of different types may suffer from...
journal article 2017
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Zhu, Zhengqiu (author), Chen, Bin (author), Reniers, G.L.L.M.E. (author), Zhang, L. (author), Qiu, S. (author), Qiu, Xiaogang (author)
The chemical industry is very important for the world economy and this industrial sector represents a substantial income source for developing countries. However, existing regulations on controlling atmospheric pollutants, and the enforcement of these regulations, often are insufficient in such countries. As a result, the deterioration of...
journal article 2017
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Zhang, L. (author), Slob, E.C. (author)
Iterative substitution of the Marchenko equation has been introduced recently to integrate internal multiple reflection in the seismic and electromagnetic imaging process. In the so-called Marchenko imaging, solving the Marchenko equation at each imaging point is required to meet this objective. It makes the scheme seriously expensive....
conference paper 2017
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Qin, Xiaoqiong (author), Liao, Mingsheng (author), Zhang, L (author), Yang, M. (author)
Thermal dilation is a vital component of deformation along the extensive railway network infrastructure. To monitor subtle deformation, the synthetic aperture radar interferometry (InSAR) technique has been adopted as a space-borne geodetic tool. However, InSAR applications in railway stability surveillance have been largely limited by the...
journal article 2017
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Slob, E.C. (author), Zhang, L. (author), Wapenaar, C.P.A. (author)
A modified implementation of Marchenko redatuming leads to a filter that removes internal multiples from reflection data. It produces local reflectivity at two-way travel time. The method creates new primary reflections resulting from emitted events that eliminate internal multiples. We call these non-physical
primaries and their presence is...
conference paper 2017
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Brück, E.H. (author), Yibole, Hargen (author), Zhang, L. (author)
After almost 20 years of intensive research on magnetocaloric effects near room temperature, magnetic refrigeration with first-order magnetocaloric materials has come close to real-life applications. Many materials have been discussed as potential candidates to be used in multicaloric devices. However, phase transitions in ferroic materials...
journal article 2016
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Kou, Baoquan (author), Xing, Feng (author), Zhang, Chaoning (author), Zhang, L. (author), Zhou, Yiheng (author), Wang, Tiecheng (author)
In the semiconductor industry, positioning accuracy and acceleration are critical parameters. To improve the acceleration speed of a motor, this paper proposes the moving-coil maglev planar motor with a concentric winding structure. The coordinate system has been built for the multiple degrees of freedom movement system. The Lorenz force...
journal article 2016
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Chao, Q. (author), Yu, J (author), Dai, C. (author), Xu, T (author), Zhang, L. (author), Wang, C.C. (author), Jin, X. (author)
We present a general solution for steering microrobotic
swarm by dynamic actuating fields. In our approach, the
motion of micro-robots is controlled by changing the actuating
direction of a field applied to them. The time-series sequence
of actuating field’s directions can be computed automatically.
Given a target position in...
conference paper 2016
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Zhang, L. (author), Slob, E.C. (author), van der Neut, J.R. (author), Staring, M. (author), Wapenaar, C.P.A. (author)
We present a one-dimensional lossless scheme to compute an image of a dissipative medium from two single-sided reflection responses. One reflection response is measured at or above the top reflector of a dissipative medium and the other reflection response is computed as if measured at or above the top reflector of a medium with negative...
conference paper 2016
Searched for: author:"Zhang, L."
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