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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, B.J. (author) journal article 2008
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- Blote, H.W.J. (author), Guo, W. (author), Hillhorst, H.J. (author) journal article 2002
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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, J. (author) journal article 2003
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Chu, J. (author), Guo, J. (author), Gill, E.K.A. (author)This paper presents closed-form solutions for the problem of long-term satellite relative motion in the presence of J2 perturbations, and introduces a design methodology for long-term passive distance-bounded relative motion. There are two key ingredients of closed-form solutions.One is the model of relative motion; the other is the Hamiltonian...journal article 2015
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- Guo, W. (author), Blöte, H.W.J. (author) journal article 2002
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- Guo, W. (author), Blote, H.W.J. (author), Wu, F.Y. (author) journal article 2000
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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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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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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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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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Guo, L. (author), Van der Wegen, M. (author), Roelvink, J.A. (author), He, Q. (author)Numerous research efforts have been devoted to understanding estuarine morphodynamics under tidal forcing. However, the impact of river discharge on estuarine morphodynamics is insufficiently examined. Inspired by the Yangtze Estuary, this work explores the morphodynamic impact of river discharge in a 560 km long tidal basin based on a 1-D model...journal article 2014
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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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- Deng, Y. (author), Guo, W. (author), Blöte, J.W. (author) journal article 2005
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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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Guo, W. (author), Blöte, H.W.J. (author)We explore the properties of the low-temperature phase of the O(n) loop model in two dimensions by means of transfer-matrix calculations and finite-size scaling. We determine the stability of this phase with respect to several kinds of perturbations, including cubic anisotropy, attraction between loop segments, double bonds, and crossing bonds....journal article 2011
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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, 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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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