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Tang, X. (author)The reliable removal of acid gas components, such as carbon dioxide (CO2) and hydrogen sulfide (H2S) from natural gas is an important technical challenge. Crude oil and hydrocarbon gas streams may contain high levels of CO2 and/or H2S as contaminants. It is desirable to prevent any contaminant to reach the surface, or to considerably reduce the...doctoral thesis 2011
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Tang, H. (author), Van Walsum, T. (author), Van Onkelen, R.S. (author), Klein, S. (author), Hameeteman, R. (author), Schaap, M. (author), Van den Bouwhuijsen, Q. (author), Witteman, J.C.M. (author), Van der Lugt, A. (author), Van Vliet, L.J. (author), Niessen, W.J. (author)We propose a minimum cost path approach to track the centerlines of the internal and external carotid arteries in multispectral MR data. User interaction is limited to the annotation of three seed points. The cost image is based on both a measure of vessel medialness and lumen intensity similarity in two MRA image sequences: Black Blood MRA and...conference paper 2011
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Tang, X. (author), Bassir, D.H. (author), Zhang, W. (author)In this work, we explore simultaneous designs of materials selection and structural optimization. As the material selection turns out to be a discrete process that finds the optimal distribution of materials over the design domain, it cannot be performed with common gradient-based optimization methods. In this paper, material selection is...journal article 2010
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Tang, S. (author)Although being a young technology, peer-to-peer (P2P) networking has spurred dramatic evolution on the Internet over the recent twenty years. Unlike traditional server-client mode, P2P networking applications are user-centric. Users (peers) generate their own content and share it with others across the Internet. Be it a P2P file-sharing network,...doctoral thesis 2010
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Van Mieghem, P. (author), Wang, H. (author), Ge, X. (author), Tang, S. (author), Kuipers, F.A. (author)Newman’s measure for (dis)assortativity, the linear degree correlation coefficient ?D, is reformulated in terms of the total number Nk of walks in the graph with k hops. This reformulation allows us to derive a new formula from which a degree-preserving rewiring algorithm is deduced, that, in each rewiring step, either increases or decreases ?D...journal article 2010
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Yeung, M.C. (author), Tang, J.M. (author), Vuik, C. (author)We consider the solution of large and sparse linear systems of equations by GMRES. Due to the appearance of unfavorable eigenvalues in the spectrum of the coefficient matrix, the convergence of GMRES may hamper. To overcome this, a deflated variant of GMRES can be used, which treats those unfavorable eigenvalues effectively. In the literature,...report 2010
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Tang, J.M. (author), MacLachlan, S.P. (author), Nabben, R. (author), Vuik, C. (author)It is well known that two-level and multilevel preconditioned conjugate gradient (PCG) methods provide efficient techniques for solving large and sparse linear systems whose coefficient matrices are symmetric and positive definite. A two-level PCG method combines a traditional (one-level) preconditioner, such as incomplete Cholesky, with a...journal article 2010
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- Van Mieghem, P.F.A. (author), Wang, H. (author), Ge, X (author), Tang, S. (author), Kuipers, F.A. (author) journal article 2010
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Poelma, C. (author), Mari, J.M. (author), Foin, N. (author), Tang, M.X. (author), Krams, R. (author), Caro, C.G. (author), Weinberg, P.D. (author), Westerweel, J. (author)Ultrasound particle image velocimetry (PIV) can be used to obtain velocity fields in non-transparent geometries and/or fluids. In the current study, we use this technique to document the flow in a curved tube, using ultrasound contrast bubbles as flow tracer particles. The performance of the technique is first tested in a straight tube, with...journal article 2009
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Tang, S. (author), Lu, Y. (author), Martín Hernández, J. (author), Kuipers, F.A. (author), Van Mieghem, P. (author)In recent years, a number of commercial peer-to-peer TV (P2PTV) applications have been launched. Yet, their mechanisms and characteristics are unknown. In this paper, we study SopCast, a typical proprietary P2PTV system. Treating SopCast as a black box, we perform a set of experiments that are suitable to analyze SopCast in depth. We attempt to...conference paper 2009
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Tang, J.M. (author), Nabben, R. (author), Vuik, C. (author), Erlangga, Y.A. (author)For various applications, it is well-known that a multi-level, in particular two-level, preconditioned CG (PCG) method is an efficient method for solving large and sparse linear systems with a coefficient matrix that is symmetric positive definite. The corresponding two-level preconditioner combines traditional and projection-type...journal article 2009
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Tang, J.M. (author)The Preconditioned Conjugate Gradient (PCG) method is one of the most popular iterative methods for solving large linear systems with a symmetric and positive semi-definite coefficient matrix. However, if the preconditioned coefficient matrix is ill-conditioned, the convergence of the PCG method typically deteriorates. Instead, a two-level PCG...doctoral thesis 2008
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- Tang, S. (author), Wang, H. (author), Van Mieghem, P. (author) conference paper 2008
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Tang, Z. (author), Leus, G. (author)In this paper, we present a single-carrier transceiver for rapidly time-varying channels, where the equalization step is implemented in the frequency domain. When the channel abides with both fast fading and severe inter-block interference, our equalizer relies on a band approximation of the frequencydomain channel matrix to maintain low...journal article 2008
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Tang, S. (author), Wang, H. (author), Van Mieghem, P. (author)We revisit the peer selection problem of finding the most nearby peer from an initiating peer. The metrics to assess the closeness between peers are hopcount and delay, respectively. Based on a dense graph model with i.i.d regular link weight, we calculate the probability density function to reach a peer with minimum hopcount and asymptotically...report 2008
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- MacLachlan, S.P. (author), Tang, J.M. (author), Vuik, C. (author) report 2008
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- Tang, J.M. (author), MacLachlan, S.P. (author), Nabben, R. (author), Vuik, C. (author) report 2008
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Tang, Z. (author)This thesis is dedicated to efficiently estimate and equalize time-varying channels in OFDM and single-carrier systems.doctoral thesis 2007
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- Tang, J.M. (author), Vuik, C. (author) report 2007
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- Tang, J.M. (author), Nabben, R. (author), Vuik, C. (author), Erlangga, Y.A. (author) report 2007