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Wei, J. (author)High-precision manipulation of small-size objects is an attractive and challenging topic for both industrial production and fundamental scientific research. The capability of monitoring micro-samples during handling is essential to the accuracy and efficiency of a handling system for both liquid and solid samples. When handling liquid samples...doctoral thesis 2010
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Van Zeijl, H.W. (author), Wei, J. (author), Shen, C. (author), Verhaar, T.M. (author), Maury, P. (author), Sarro, P.M. (author)Lithography for IC device fabrication is a high volume high accuracy production technology. Such production characteristics are also attractive for MEMS and 3 dimensional (3D) integration processes. However, advanced lithography has a strong 2 dimensional (2D) nature and is not optimized to fabricate 3D structures. In this work, 5 exposure and...journal article 2010
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Van Zeijl, H.W. (author), Wei, J. (author), Shen, C. (author), Verhaar, T.M. (author), Sarro, P.M. (author)Lithography as developed for IC device fabrication is a high volume high accuracy patterning technology with strong 2 dimensional (2D) characteristics. This 2D nature makes it a challenge to integrate this technology in a 3 dimensional (3D) manufacturing environment. This article addresses the performance of a waferstepper (ASML PAS5000) in...journal article 2010
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Wei, J. (author), Magnani, S. (author), Sarro, P.M. (author)This paper presents a submicron suspended piezoresistive silicon-beam structure as a basic sensing element to replace the conventional piezoresistors, so to improve the detection sensitivity. The alternative element benefits from the increase of the induced stress, which is locally concentrated on the suspended submicron beam. This approach...journal article 2011
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Weijermars, R. (author), Taylor, P. (author), Bahn, O. (author), Das, S.R. (author), Wei, Y.M. (author)Organizational behavior and stakeholder processes continually influence energy strategy choices and decisions. Although theoretical optimizations can provide guidance for energy mix decisions from a pure physical systems engineering point of view, these solutions might not be optimal from a political or social perspective. Improving the...journal article 2011
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Estevez, P. (author), Bank, J. (author), Porta, M. (author), Wei, J. (author), Sarro, P.M. (author), Tichem, M. (author), Staufer, U. (author)This paper presents the design, fabrication and characterization of a piezoresistive 6 Degrees of Freedom (DOF) force and torque sensor to be used in micro-manipulation. The mechanical structure of the device consists of 7 suspended beams and a calibration structure, which can be replaced by micro-manipulation tools such as micro-grippers or...journal article 2011
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- Wei, Yan (author) doctoral thesis 2012
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- Wei, Y. (author) doctoral thesis 2012
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Wei, W. (author), Fu, L. (author), Blacquiere, G. (author)A method for the efficient computation of multifrequency focal beams for 3D seismic acquisition geometry analysis has been developed. By computing them for all the frequency components of seismic data, single-frequency focal beams can be extended to multifrequency focal beams. However, this straightforward method involves considerable computer...journal article 2012
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Wei, Y. (author)The most important characteristics of the outfitting processes in shipbuilding are: 1. The processes involve many interferences between yard and different subcontractors. In recent years, the use of outsourcing and subcontracting has become a widespread strategy of western shipyards. There exists not only the vertical relationship between a yard...doctoral thesis 2012
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Wei, J. (author), Ye, H. (author), Van Zeijl, H.W. (author), Sarro, P.M. (author), Zhang, G.Q. (author)A micro-electro-mechanical-system (MEMS) based, temperature triggered, switch is developed as a cost-effective solution for smart cooling control of solid-state-lighting systems. The switch (1.0x0.4 mm2) is embedded in a silicon substrate and fabricated with a single-mask 3D micro-machining process. The device switches on at a designed...journal article 2012
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Pereira, S.F. (author), Wiegman, A. (author), Kumar, N. (author), Da Costa Assafrao, A. (author), Polo, A. (author), Wei, L. (author), Van Haver, S. (author)Measurement techniques to determine the aberration of an optical system, by obtaining through-focus intensity images that are produced when the object is a point source at infinity, are shown. The analysis of the aberrations is made using the extended version of the Nijboer-Zernike diffraction theory. This theory provides a semi analytical...conference paper 2012
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- Wei, L (author), Elsinga, G.E. (author), Brethouwer, G (author), Schlatter, P (author), Johansson, AV (author) conference paper 2013
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Konijnenberg, A.P. (author), Wei, L. (author), Kumar, N. (author), Couto Correa Pinto Filho, L. (author), Cisotto, L. (author), Pereira, S.F. (author), Urbach, H.P. (author)In several optical systems, a specific Point Spread Function (PSF) needs to be generated. This can be achieved by shaping the complex field at the pupil. The Extended Nijboer-Zernike (ENZ) theory relates complex Zernike modes on the pupil directly to functions in the focal region. In this paper, we introduce a method to engineer a PSF using the...journal article 2014
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Li, J. (author), Van Zuylen, H.J. (author), Wei, G. (author)Traffic volume and queue length are two important variables to identify traffic states in urban areas. Loop detectors are often used for monitoring traffic. A prominent weakness of loop detector data is the limited reliability due to equipment malfunctions and communication faults. This paper presents a method to identify the validity of loop...conference paper 2014
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Wei, L. (author), Elsinga, G.E. (author), Brethouwer, G. (author), Schlatter, P. (author), Johansson, A.V. (author)The Reynolds number scaling of flow topology in the eigenframe of the strain-rate tensor is investigated for wall-bounded flows, which is motivated by earlier works showing that such topologies appear to be qualitatively universal across turbulent flows. The databases used in the current study are from direct numerical simulations (DNS) of fully...journal article 2014
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- Wei, He. (author), Castiglione, T. (author), Kandasamy, M. (author), Stern, F. (author) journal article 2015
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- Siebelt, M (author), Korthagen, NM (author), Wei, W. (author), Groen, H (author), Bastiaansen-Jenniskens, YM (author), Müller, C (author), Waarsing, JH (author), de Jong, M (author), Weinans, Harrie (author) journal article 2015
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Luo, Y.C. (author), Liu, X.X. (author), Hayton, D.J. (author), Wei, L. (author), Gao, J.R. (author), Groppi, C. (author)A Fourier phase grating mirror will be applied to split a single, coherent terahertz source beam into multi-beams, which are spatially distributed as required for the local oscillator in an array receiver. We report on the simulation, design and fabrication of a Fourier phase grating at 1.25 THz for generating 2×2 beams, and the measurements at...conference paper 2015
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Wei, C. (author)Multi-robot teams have potential advantages over a single robot. Robots in a team can serve different functionalities, so a team of robots can be more efficient, robust and reliable than a single robot. In this dissertation, we are in particular interested in human level intelligent multi-robot teams. Social deliberation should be taken into...doctoral thesis 2015