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Kumar, N. (author), Strikwerda, A.C. (author), Fan, K. (author), Zhang, X. (author), Averitt, R.D. (author), Planken, P.C.M. (author), Adam, A.J.L. (author)We report on direct measurements of the magnetic near-field of metamaterial split ring resonators at terahertz frequencies using a magnetic field sensitive material. Specifically, planar split ring resonators are fabricated on a single magneto-optically active terbium gallium garnet crystal. Normally incident terahertz radiation couples to the...journal article 2012
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Zhang, B. (author), Van der Weide, J.A.M. (author), Oosterlee, C.W. (author)In this article, we propose an efficient pricing method for Asian options with early–exercise features. It is based on a two–dimensional integration and a backward recursion of the Fourier coefficients, in which several numerical techniques, like Fourier cosine expansions, Clenshaw–Curtis quadrature and the Fast Fourier transform (FFT) are...report 2012
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Hayton, D.J. (author), Gao, J.R. (author), Kooi, J.W. (author), Ren, Y. (author), Zhang, W. (author), De Lange, G. (author)We report on a method to stabilize a hot electron bolometer (HEB) mixer at 2.5 THz. The technique utilizes feedback control of the local oscillator (LO) laser power by means of a swing-arm actuator placed in the optical beam path. We demonstrate that this technique yields a factor of 50 improvement in the spectroscopic Allan variance time which...journal article 2012
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- van der Werff, Solange (author), Haase, Andrea (author), Huijsmans, Rene (author), Zhang, Qin (author) conference paper 2012
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- Zhang, Su-xia (author), Tang, You-gang (author), Liu, Xi-jun (author) journal article 2012
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Zhang, B. (author), Oosterlee, C.W. (author)We propose an efficient pricing method for arithmetic, and geometric, Asian options under Levy processes, based on Fourier cosine expansions and Clenshaw–Curtis quadrature. The pricing method is developed for both European–style and American–style Asian options, and for discretely and continuously monitored versions. In the present paper we...report 2011
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Zhang, Q. (author), Ye, G. (author)When a concrete structure is exposed to high temperature, the mechanical damage and chemical transformation take place simultaneously, which will change the microstructure of material. On the other hand, the mechanical properties and transport properties depend on the development of microstructure of cement paste. In order to study the...journal article 2011
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Gong, Z. (author), Wang, Z.B. (author), Stive, M.J.F. (author), Zhang, C.K. (author)A schematized process-based model of tidal flat evolution was constructed with dimensions similar to the tidal flats near the Wanggang Mouth at the central coast of Jiangsu, China. The simulated flow patterns agree qualitatively with field observations from literature, i.e. involving tidal asymmetry, current directions and tidal wave features....conference paper 2011
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Zhang, B. (author), Teunissen, P.J.G. (author), Odijk, D. (author)In this contribution, a novel un-differenced (UD) (PPP-RTK) concept, i.e. a synthesis of Precise Point Positioning and Network-based Real-Time Kinematic concept, is introduced. In the first step of our PPP-RTK approach, the UD GNSS observations from a regional reference network are processed based upon re-parameterised observation equations,...journal article 2011
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Chen, X. (author), Yuan, C. (author), Wong, C.K.Y. (author), Zhang, G. (author)A molecular modeling strategy is proposed to describe the temperature (T) dependence of solubility parameter (?) for the amorphous polymers which exhibit glass-rubber transition behavior. The commercial forcefield “COMPASS” is used to support the atomistic simulations of the polymer. The temperature dependence behavior of ? for the polymer is...journal article 2011
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Chen, X.P. (author), Wong, C.K.Y. (author), Yuan, C.A. (author), Zhang, G.Q. (author)We report a molecular modeling study to evaluate and select conducting polymers (CPs) as the sensing materials of carbon dioxide (CO2) sensor. The interaction between polymer and gas and the adsorption of the gas molecules in the polymer matrix are investigated. Polymers considered for this work include emeraldine base polyaniline (EB–PANI) and...journal article 2011
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Dung, N.H. (author), Zhang, L. (author), Ou, Z.Q. (author), Brück, E. (author)We report on structural, magnetic, and magnetocaloric properties of MnxFe1.95?xP0.50Si0.50 (x???1.10) compounds. With increasing the Mn:Fe ratio, a first-order magneto-elastic transition gradually changes into a first-order magneto-structural transition via a second-order magnetic transition. The study also shows that thermal hysteresis can be...journal article 2011
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Rainey, P.B. (author), Beaumont, H.J.E. (author), Ferguson, G.C. (author), Gallie, J. (author), Kost, C. (author), Libby, E. (author), Zhang, X.X. (author)Stochastic phenotype switching – or bet hedging – is a pervasive feature of living systems and common in bacteria that experience fluctuating (unpredictable) environmental conditions. Under such conditions, the capacity to generate variable offspring spreads the risk of being maladapted in the present environment, against offspring likely to...journal article 2011
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Zhang, X. (author), Van Wee, G.P. (author)In this paper, we introduce a new duration dependent parking fee regime based on the travel cost for an entire day, rather than a single commute trip. Commuters are assumed to reside at one end of a linear city and work in a business center at the other end. A two-stage differential method is used to derive user equilibrium travel patterns for...journal article 2011
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Zhang, D. (author), Tavakoliyaraki, A. (author), Wu, Y. (author), Van Swaaij, R.A.C.M.M. (author), Zeman, M. (author)Heterojunction silicon with intrinsic thin layer (HIT) solar cells that combine advanced thin-film hydrogenated amorphous silicon (a-Si:H) and crystalline silicon (c-Si) technologies are promising because of the high performance at low cost. Due to the low conductivity of a-Si:H, indium tin oxide (ITO) needs to be used as a front contact layer...journal article 2011
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Fernandez Arguedas, V. (author), Zhang, Q. (author), Chandramouli, K. (author), Izquierdo, E. (author)In this paper, we present a part of surveillance centric indexing framework aimed at studying the performance of multi-feature fusion technique for indexing objects from surveillance videos. The multi-feature fusion algorithm determines an optimal metric for fusing low-level descriptors extracted from different feature space. These low-level...conference paper 2011
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Zhang, L. (author), Eskin, D.G. (author), Katgerman, L. (author)Ultrasonic melt treatment (UST) is known to induce grain refining in aluminum alloys. Previous studies have clearly shown that in Al–Zr–Ti alloys, the primary Al3Zr intermetallics were dramatically refined by cavitation-assisted fragmentation, and a good refinement effect was achieved. In this article, Al–Ti, Al–Ti–Zr alloys, and some commercial...journal article 2011
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De Weerdt, M.M. (author), Zhang, Y. (author), Klos, T. (author)This paper proposes a new variant of the task allocation problem, where the agents are connected in a social network and tasks arrive at the agents distributed over the network. We show that the complexity of this problem remains NP-complete. Moreover, it is not approximable within some factor. In contrast to this, we develop an efficient greedy...journal article 2011
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- Zhang, L.-J. (author) journal article 2011
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- Zhang, Sheguang (author), Weems, Kenneth (author), Lin, Woei-Min (author) conference paper 2011