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Korounis, D. (author), Durlofsky, L.J. (author), Jansen, J.D. (author), Aziz, K. (author)An adjoint formulation for the gradient-based optimization of oil-gas compositional reservoir simulation problems is presented. The method is implemented within an automatic differentiation-based compositional flow simulator (Stanford's AD-GPRS). The development of adjoint procedures for general compositional problems is much more challenging...journal article 2014
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- Wheeler, M.F. (author), Dawson, C. (author), Jansen, J.D. (author) journal article 2011
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Namdar Zanganeh, M. (author), Kraaijevanger, J.F.B.M. (author), Buurman, H.W. (author), Jansen, J.D. (author), Rossen, W.R. (author)We apply adjoint-based optimization to a Surfactant-Alternating-Gas foam process using a linear foam model introducing gradual changes in gas mobility and a nonlinear foam model giving abrupt changes in gas mobility as function of oil and water saturations and surfactant concentration. For the linear foam model, the objective function is a...journal article 2014
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Jansen, K. (author), Wu, M. (author), Van der Steen, A.F.W. (author), Van Soest, G. (author)The presence of lipids in atherosclerotic coronary lesions is an important determinant of their potential to trigger acute coronary events. Spectroscopic intravascular photoacoustic imaging (sIVPA) has the potential to automatically detect lipids in atherosclerotic lesions. For realtime in vivo imaging, limiting the number of excitation...journal article 2013
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Jansen, S.J.T. (author)The demographic, socio-economic and socio-cultural shifts that have taken place in Western economies in recent decades have generated a broader variety in housing behavior. For this reason, some researchers argue that socio-demographic characteristics alone no longer suffice to predict the housing demand. They should be supplemented with ...journal article 2012
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Jansen, K. (author), Van Soest, G. (author), Van der Steen, A.F.W. (author)The vulnerable atherosclerotic plaque is believed to be at the root of the majority of acute coronary events. Even though the exact origins of plaque vulnerability remain elusive, the thin-cap fibroatheroma, characterized by a lipid-rich necrotic core covered by a thin fibrous cap, is considered to be the most prominent type of vulnerable plaque...journal article 2014
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Zandvliet, M.J. (author), Van Doren, J.F.M. (author), Bosgra, O.H. (author), Jansen, J.D. (author), Van den Hof, P.M.J. (author)Over the past few years, more and more systems and control concepts have been applied in reservoir engineering, such as optimal control, Kalman filtering, and model reduction. The success of these applications is determined by the controllability, observability, and identifiability properties of the reservoir at hand. The first contribution of...journal article 2008
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- Zoetelief, J. (author), Veldkamp, W.J.H. (author), Thijssen, M.A.O. (author), Jansen, J.T.M. (author) journal article 2006
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Fonseca, R.M. (author), Leeuwenburgh, O. (author), Van den Hof, P.M.J. (author), Jansen, J.D. (author)In an earlier study two hierarchical multi-objective methods were suggested to include short-term targets in life-cycle production optimization. However this earlier study has two limitations: 1) the adjoint formulation is used to obtain gradient information, requiring simulator source code access and an extensive implementation effort, and 2)...journal article 2014
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- Holweg, P.A.M. (author), Kokkedee, J.A. (author), Caro, J. (author), Verbruggen, A.H. (author), Radelaar, S. (author), Jansen, A.G.M. (author), Wyder, P. (author) journal article 1991
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Jansen, K. (author), Wu, M. (author), Van der Steen, A.F.W. (author), Van Soest, G. (author)Spectroscopic intravascular photoacoustic imaging (sIVPA) has shown promise to detect and distinguish lipids in atherosclerotic plaques. sIVPA generally utilizes one of the two high absorption bands in the lipid absorption spectrum at 1.2 ?m and 1.7 ?m. Specific absorption signatures of various lipid compounds within the bands in either...journal article 2014
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Horeman, T. (author), Rodrigues, S.P. (author), Jansen, F.W. (author), Dankelman, J. (author), Van den Dobbelsteen, J.J. (author)Background - To improve endoscopic surgical skills, an increasing number of surgical residents practice on box or virtual-reality (VR) trainers. Current training is mainly focused on hand–eye coordination. Training methods that focus on applying the right amount of force are not yet available. Methods - The aim of this project is to develop a...journal article 2010
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- Chmarra, M.K. (author), Kolkman, W. (author), Jansen, F.W. (author), Grimbergen, C.A. (author), Dankelman, J. (author) journal article 2007
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- van den Berg, A.W.C. (author), Bromley, S.T. (author), Wojdel, J.C. (author), Jansen, J.C. (author) journal article 2005
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Wakker, P.P. (author), Jansen, S.J.T. (author), Stiggelbout, A.M. (author)This paper introduces anchor levels as a new tool for multiattribute utility theory. Anchor levels are attribute levels whose values are not affected by other attributes. They allow for new interpretations and generalizations of known representations and utility measurement techniques. Generalizations of earlier techniques can be obtained...journal article 2004
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Zoumpouidis, T. (author), Wang, L. (author), Bartek, M. (author), Jansen, K.M.B. (author), Ernst, L.J. (author)Our progress in developing technology modules for deformable single-crystalline-silicon electronics is presented in this contribution. Additional deformability/reliability is accomplished by modifications of the previously reported ultra-thin and flexible CIRCONFLEX technology (1). The flexibility is added in the last steps of the process flow...journal article 2007
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Joustra, J.J. (author), Jansen, A.J. (author)This paper describes the development of a model to simulate a dinghy sailors’ body temperature during a sailing match. This simulation has been developed as part of the master thesis by the author: “Thermal optimization of competitive sailing gear”. A literature study is done to define the human body heat balance and thermal comfort. Next a...journal article 2014
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Barros, E.G.D. (author), Van den Hof, P.M.J. (author), Jansen, J.D. (author)This paper proposes a new methodology to perform value of information (VOI) analysis within a closed-loop reservoir management (CLRM) framework. The workflow combines tools such as robust optimization and history matching in an environment of uncertainty characterization. The approach is illustrated with two simple examples: an analytical...journal article 2015
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- Jansen, K.M.B. (author), Wang, L.G. (author), Ernst, L.J. (author), Zhang, G.Q. (author), Bressers, H.J.L. (author) journal article 2004
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Dessing, O. (author), Jansen, A.J. (author), Leihitu, C. (author), Overhage, D. (author)As indoor sports shoes are intensively used in a warm and sweaty environment for periods of up to three consecutive hours, the built-up heat inside is insufficiently released causing warm and perspiring feet. This results in an increased chance of blisters and skin irritations. Experimental research on the ventilation properties of the shoe was...journal article 2014