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Guo, J. (author), Han, C. (author)
Future lunar missions ask for the capability to perform precise Guidance, Navigation and Control (GNC) to the selected landing sites on the lunar surface. This paper studies the guidance issues for the lunar pinpoint soft landing problem. The primary contribution of this paper is the design of descent guidance law based on the Pontryagin maximum...
journal article 2009
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Guo, W. (author), Blöte, H.W.J. (author), Ren, Z. (author)
journal article 2005
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Duan, X.J. (author), Guo, J.Y. (author), Shum, C.K. (author), Van der Wal, W. (author)
We revisit the empirical moving window filtering method of Swenson and Wahr (Geophys Res Lett 33:L08402, 2006) and its variants, Chambers (Geophys Res Lett 33:L17603, 2006) and Chen et al. (Geophys Res Lett 34: L13302, 2007), for reducing the correlated errors in the Stokes coefficients (SCs) of the spherical harmonic expansion of the GRACE...
journal article 2009
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Hashemi Farahani, H. (author), Ditmar, P.G. (author), Klees, R. (author), De Teixeira da Encarnacao, J.G. (author), Liu, X. (author), Zhao, Q. (author), Guo, J. (author)
The ability of satellite gravimetry data to validate global static models of the Earth’s gravity field is studied. Two types of data are considered: K-band ranging (KBR) data from the Gravity Recovery and Climate Experiment (GRACE) mission and Satellite Gravity Gradiometry (SGG) data from the GOCE (Gravity field and steady-state Ocean...
journal article 2013
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Guo, D. (author), Trajanovski, S. (author), Van de Bovenkamp, R. (author), Wang, H. (author), Van Mieghem, P.F.A. (author)
The interplay between disease dynamics on a network and the dynamics of the structure of that network characterizes many real-world systems of contacts. A continuous-time adaptive susceptible-infectious-susceptible (ASIS) model is introduced in order to investigate this interaction, where a susceptible node avoids infections by breaking its...
journal article 2013
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Deng, Y. (author), Guo, W. (author), Blöte, J.W. (author)
journal article 2005
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Guo, W. (author), Blote, H.W.J. (author), Wu, F.Y. (author)
journal article 2000
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Huang, F. (author), Xia, Z. (author), Li, F. (author), Guo, L. (author), Yang, F. (author)
Hydrological changes of the Irtysh River were analyzed concerning the changes of annual runoff and its distribution features within a year measured by coefficient of variation and concentration degree. Abrupt changes were detected by the heuristic segmentation method. Possible causes of the hydrological changes were investigated considering...
journal article 2012
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Geprägs, S. (author), Kehlberger, A. (author), Coletta, F.D. (author), Qiu, Z. (author), Guo, E.J. (author), Schulz, T. (author), Mix, C. (author), Meyer, S. (author), Kamra, A. (author), Althammer, M. (author), Huebl, H. (author), Jakob, G. (author), Ohnuma, Y. (author), Adachi, H. (author), Barker, J. (author), Maekawa, S. (author), Bauer, G.E.W. (author), Saitoh, E. (author), Gross, R. (author), Goennenwein, S.T.B. (author), Kläui, M. (author)
Magnons are the elementary excitations of a magnetically ordered system. In ferromagnets, only a single band of low-energy magnons needs to be considered, but in ferrimagnets the situation is more complex owing to different magnetic sublattices involved. In this case, low lying optical modes exist that can affect the dynamical response. Here we...
journal article 2016
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Stroeven, P. (author), Guo, Z. (author)
This paper concentrates on discrete element computer-simulation of concrete. It is argued on the basis of stochastic heterogeneity theory that modern concurrent-algorithm-based systems should be employed for the assessment of pore characteristics underlying durability performance of cementitious materials. The SPACE system was developed at Delft...
journal article 2006
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Trajanovski, S. (author), Guo, D. (author), Van Mieghem, P.F.A. (author)
The continuous-time adaptive susceptible-infected-susceptible (ASIS) epidemic model and the adaptive information diffusion (AID) model are two adaptive spreading processes on networks, in which a link in the network changes depending on the infectious state of its end nodes, but in opposite ways: (i) In the ASIS model a link is removed between...
journal article 2015
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Guo, L. (author), Van der Wegen, M. (author), Jay, D.A. (author), Matte, P. (author), Wang, Z.B. (author), Roelvink, J.A. (author), He, Q. (author)
River-tide dynamics remain poorly understood, in part because conventional harmonic analysis (HA) does not cope effectively with nonstationary signals. To explore nonstationary behavior of river tides and the modulation effects of river discharge, this work analyzes tidal signals in the Yangtze River estuary using both HA in a nonstationary mode...
journal article 2015
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Guo, W. (author), Qian, X. (author), Blöte, H.W.J. (author), Wu, F.Y. (author)
journal article 2006
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Cervone, A. (author), Zandbergen, B. (author), Bouwmester, J. (author), Guo, J. (author)
The Space Systems Engineering department at the Faculty of Aerospace Engineering is hard at work miniaturizing satellite subsystems to accommodate the growing use of small satellites. One of the challenges the department has taken on is research into micro-propulsion. The limitations that come with small satellites make research in this !eld...
journal article 2013
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Li, B. (author), Guo, W. (author), Blöte, H.W.J. (author)
A critical dilute O(n) model on the kagome lattice is investigated analytically and numerically. We employ a number of exact equivalences which, in a few steps, link the critical O(n) spin model on the kagome lattice to the exactly solvable critical q-state Potts model on the honeycomb lattice with q=(n+1)². The intermediate steps involve the...
journal article 2008
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Guo, W. (author), Nienhuis, B. (author), Blote, H.W.J. (author)
journal article 2006
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Guo, Z. (author), Sluys, L.J. (author)
The simulation of rubber-like material behaviour by means of the finite element method has been described in this study. Proper material models were selected for the numerical description of static hyper-elasticity. The combinations of a continuum damage mechanics concept and a pseudo-elastic concept with Gao's elastic law were used to simulate...
journal article 2008
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Sun, R. (author), O'Keefe, K. (author), Guo, J. (author), Gill, E. (author)
This paper proposes a precise and fast direction of arrival estimation method using Global Navigation Satellite System (GNSS) carrier phase measurements. Single-epoch, single-satellite integer cycle ambiguities are reliably resolved by making use of constraints and taking advantages of antenna arrays. The algorithm shows good robustness in cases...
journal article 2013
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Sun, R. (author), Guo, J. (author), Gill, E.K.A. (author), Maessen, D.C. (author)
Precision formation flying missions require formation acquisition and maintenance through the interactions among spacecraft by the inter-satellite communication and relative navigation. This paper analyses the dedicated system constraints of the network architecture for precision formation flying missions. The critical time issue and the...
journal article 2012
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Guo, W. (author), Blöte, H.W.J. (author)
journal article 2002
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