Searched for: subject:"Gradient%5C-based%5C+Optimization"
(1 - 10 of 10)
document
Mangano, Marco (author)
The second-generation of supersonic civil transport has to match ambitious targets in terms of noise reduction and efficiency to become economically and environmentally viable. High-fidelity numerical optimization offers a powerful approach to address the complex trade-offs intrinsic to this novel configuration. Past and current research however...
master thesis 2019
document
Hoogerbrugge, Ary-Jan (author)
In modern ASML machines optical components play an important role in the lithography process. EUV light is transported from the source to wafer by reflective optics. These mirrors are subjected to large thermal loading, as a large portion of the reflected light is absorbed in the mirror structure. The portion of the absorbed light is strongly...
master thesis 2019
document
Risselada, Dirk (author)
The Deployable SpaceTelescope Project was started at Delft University of Technology in 2014. The projectaims to develop an ultra-high resolution Earth Observation telescope with aresolution of 0.25m, but with a much lower mass and volume than its competitorscurrently in operation. In order to meet the stringent mass...
master thesis 2019
document
Jesus de Moraes, R. (author), Fonseca, Rahul-Mark (author), Helici, Mircea A. (author), Heemink, A.W. (author), Jansen, J.D. (author)
We present an efficient workflow that combines multiscale (MS) forward simulation and stochastic gradient computation - MS-StoSAG - for the optimization of well controls applied to waterflooding under geological uncertainty. A two-stage iterative Multiscale Finite Volume (i-MSFV), a mass conservative reservoir simulation strategy, is employed as...
journal article 2019
document
Jesus de Moraes, R. (author), Rodrigues, José R.P. (author), Hajibeygi, H. (author), Jansen, J.D. (author)
A generic framework for the computation of derivative information required for gradient-based optimization using sequentially coupled subsurface simulation models is presented. The proposed approach allows for the computation of any derivative information with no modification of the mathematical framework. It only requires the forward model...
journal article 2018
document
Jesus de Moraes, R. (author), Rodrigues, José R P (author), Hajibeygi, H. (author), Jansen, J.D. (author)
An efficient multiscale (MS) gradient computation method for subsurface flow management and optimization is introduced. The general, algebraic framework allows for the calculation of gradients using both the Direct and Adjoint derivative methods. The framework also allows for the utilization of any MS formulation that can be algebraically...
journal article 2017
document
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
document
Yu, Y. (author)
With a high demand of oil, optimization of oil output in the reservoir field is urgent and significant. Practical production problems often involve large, highly complex reservoir models, with up to thousands of unknowns and many constraints. Moreover, our understanding of the reservoir is always highly uncertain, and this uncertainty can be...
master thesis 2011
document
Namdar Zanganeh, M. (author)
Chemical enhanced oil recovery (EOR) is relatively expensive due to the high cost of the injected chemicals such as surfactants. Excessive use of these chemicals leads to processes that are not economically feasible. Therefore, optimizing the volume of these injected chemicals is of extreme importance. We intend to maximize the long-term...
doctoral thesis 2011
document
Marcelet, M. (author), Peter, J. (author), Carrier, G. (author)
In order to solve a multi-disciplinary optimization problem with strongly coupled disciplines, like the design of a commercial aircraft's wing, an aero-structural design framework is currently under construction. The optimization process is gradient-based and relies on the method of feasible directions. Several constraints can be applied, but...
conference paper 2006
Searched for: subject:"Gradient%5C-based%5C+Optimization"
(1 - 10 of 10)