Search Results - "Waanders, B."

Fractional Operators Applied to Geophysical Electromagnetics by Weiss, C J, van Bloemen Waanders, B G, Antil, H

“…SUMMARY A growing body of applied mathematics literature in recent years has focused on the application of fractional calculus to problems of anomalous…”
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Goal-oriented, model-constrained optimization for reduction of large-scale systems by Bui-Thanh, T., Willcox, K., Ghattas, O., van Bloemen Waanders, B.

“…Optimization-oriented reduced-order models should target a particular output functional, span an applicable range of dynamic and parametric inputs, and respect…”
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Coal and coal ash characteristics to understand mineral transformations and slag formation by Van Dyk, J.C., Benson, S.A., Laumb, M.L., Waanders, B.

“…A knowledge of the composition and structure of minerals in coal is necessary in order to understand the mineral transformations and agglomerate or slag…”
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Hessian-based model reduction: large-scale inversion and prediction by Lieberman, C., Fidkowski, K., Willcox, K., van Bloemen Waanders, B.

“…SUMMARY Hessian‐based model reduction was previously proposed as an approach in deriving reduced models for the solution of large‐scale linear inverse problems…”
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Simultaneous inversion of shear modulus and traction boundary conditions in biomechanical imaging by Seidl, D. T., van Bloemen Waanders, B. G., Wildey, T. M.

“…We present a formulation to simultaneously invert for a heterogeneous shear modulus field and traction boundary conditions in an incompressible linear elastic…”
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Hessian-based model reduction for large-scale systems with initial-condition inputs by Bashir, O., Willcox, K., Ghattas, O., van Bloemen Waanders, B., Hill, J.

“…Reduced‐order models that are able to approximate output quantities of interest of high‐fidelity computational models over a wide range of input parameters…”
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Trace element behaviour in the Sasol–Lurgi MK IV FBDB gasifier. Part 1 – The volatile elements: Hg, As, Se, Cd and Pb by Bunt, J.R., Waanders, F.B.

“…Coal-fired power and heat production are the largest single source of Hg in the atmosphere, and in March 2005, the US-EPA ruled regarding Hg reduction from…”
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Trace element behaviour in the Sasol-Lurgi fixed-bed dry-bottom gasifier. Part 3 – The non-volatile elements: Ba, Co, Cr, Mn, and V by Bunt, J.R., Waanders, F.B.

“…Coal contains most of the naturally occurring chemical elements in (at least) trace amounts, with specific elements and their concentrations dependent on the…”
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Viscosity predictions of the slag composition of gasified coal, utilizing FactSage equilibrium modelling by van Dyk, J.C., Waanders, F.B., Benson, S.A., Laumb, M.L., Hack, K.

“…Agglomeration of ash particles provides the desired porosity of the ash bed for adequate agent (steam and oxygen) flow and distribution, whereas excessive…”
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A sparse reconstruction method for the estimation of multi-resolution emission fields via atmospheric inversion by Ray, J, Lee, J, Yadav, V, Lefantzi, S, Michalak, A. M, van Bloemen Waanders, B

“…Atmospheric inversions are frequently used to estimate fluxes of atmospheric greenhouse gases (e.g., biospheric CO2 flux fields) at Earth's surface. These…”
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Mixing at Cross Junctions in Water Distribution Systems. II: Experimental Study by Austin, R. G, Waanders, B. van Bloemen, McKenna, S, Choi, C. Y

“…The present experimental study focuses on the characterization of complex mixing phenomena at pipe intersections within pressurized water distribution…”
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A multiresolution spatial parameterization for the estimation of fossil-fuel carbon dioxide emissions via atmospheric inversions by Ray, J, Yadav, V, Michalak, A. M, van Bloemen Waanders, B, McKenna, S. A

“…The characterization of fossil-fuel CO2 (ffCO2) emissions is paramount to carbon cycle studies, but the use of atmospheric inverse modeling approaches for this…”
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Metagenomic profiling dataset of bacterial communities of a drinking water supply system (DWSS) in the arid Namaqualand region, South Africa: Source (lower Orange River) to point-of-use (O'Kiep) by Erdogan, Innocentia G., Mekuto, Lukhanyo, Ntwampe, Seteno K.O., Fosso-Kankeu, Elvis, Waanders, Frans B.

“…The metagenomic data presented herein contains the bacterial community profile of a drinking water supply system (DWSS) supplying O'Kiep, Namaqualand, South…”
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Physical property behaviour of North Dakota lignite in an oxygen/steam blown moving bed gasifier by Mangena, S.J., Bunt, J.R., Waanders, F.B.

“…In this study lignite originating from North Dakota (USA) was thermally treated in an oxygen/steam blown commercial-scale moving bed gasifier operating on lump…”
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Identification of the reaction zones occurring in a commercial-scale Sasol–Lurgi FBDB gasifier by Bunt, J.R., Waanders, F.B.

“…Gasification behaviour is particle dependent, whilst gasifier (reactor) behaviour is an averaging process of individual responses of each particle. It was…”
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Bayesian reconstruction of binary media with unresolved fine-scale spatial structures by Ray, J., McKenna, S.A., van Bloemen Waanders, B., Marzouk, Y.M.

“…► We reconstruct of a binary medium from sparse static and dynamic measurements. ► The medium consists of unresolved inclusions in a matrix, upscaled by a new…”
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Manipulation of gasification coal feed in order to increase the ash fusion temperature of the coal enabling the gasifiers to operate at higher temperatures by van Dyk, J.C., Waanders, F.B.

“…Coal is a crucial feedstock for South Africa’s unique synfuels and petrochemicals industry and used by Sasol as a feedstock to produce synthesis gas via the…”
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Mineralogical behaviour of North Dakota lignite in an oxygen/steam blown moving bed reactor by Mangena, S.J., Bunt, J.R., Waanders, F.B.

“…In this study, lignite from North Dakota (USA) was thermally treated in a commercial-scale oxygen/steam blown moving bed reactor at the Dakota Gasification…”
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An understanding of the behaviour of a number of element phases impacting on a commercial-scale Sasol-Lurgi FBDB gasifier by Bunt, J.R., Waanders, F.B.

“…Chemical properties of coal which impact on gasification performance relate to those processes which do effect a change in chemical constitution, these in turn…”
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Identification of reaction zones in a commercial Sasol-Lurgi fixed bed dry bottom gasifier operating on North Dakota lignite by Mangena, S.J., Bunt, J.R., Waanders, F.B., Baker, G.

“…The Sasol-Lurgi fixed bed dry bottom gasification technology has the biggest market share in the world with 101 gasifiers in operation. To be able to further…”
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