1,721,019 research outputs found
Identification Of Mimo Lpv Models Based On Interpolation
No full textThis paper presents SMILE (State-space Model Interpolation of Local Estimates), a new technique to estimate linear parameter varying state-space models for multiple-input multiple-output systems whose dynamics depends on a single varying parameter, called the scheduling parameter. The SMILE technique is based on the interpolation of linear time-invariant models that are valid for fixed operating conditions of the system, that is, for constant values of the scheduling parameters. The methodology yields affine LPV models that are numerically well-conditioned and therefore suitable for LPV control synthesis procedures. The underlying interpolation technique is formulated as a nonlinear least-squares optimization problem that can be efficiently solved by standard solvers. Application of the proposed methodology to a vibroacoustic setup, whose dynamics are highly sensitive to the ambient temperature, clearly demonstrates the potential of the SMILE technique. © 2008 by the Katholieke Universiteit Leuven Department of Mechanical Engineering All rights reserved.526312644Leith, D.J., Leithead, W.E., Survey of gain-scheduling analysis and design (2000) Int. J. Control, 73 (11), pp. 1001-1025Rugh, W.J., Shamma, J.S., Research on gain scheduling (2000) Automatica, 36 (10), pp. 1401-1425Shamma, J.S., Athans, M., Guaranteed properties of gain scheduled control for linear parametervarying plants (1991) Automatica, 27 (3), pp. 559-564De Caigny, J., Camino, J.F., Oliveira, R.C.L.F., Peres, P.L.D., Swevers, J., Gain scheduled H2- control of discrete-time polytopic time varying systems (2008) Congresso Brasileiro De Automática, , Juiz de Fora, Brazil, Sept, (To appear)De Caigny, J., Camino, J.F., Oliveira, R.C.L.F., Peres, P.L.D., Swevers, J., Gain scheduled H∞- control of discrete-time polytopic time varying systems (2008) Proc. 47th IEEE Conf. Decision Control, , Cancun, Mexico, Dec, (To appear)Nemani, M., Ravikanth, R., Bamieh, B.A., Identification of linear parametrically varying systems (1995) Proc. 34th IEEE Conf. Decision Control, pp. 2990-2995. , (New Orleans, LA, USA), DecLee, L.H., Poolla, K., Identification of linear parameter-varying systems using nonlinear programming (1999) J. Dyn. Syst. Meas. Contr, 121 (1), pp. 71-78Bamieh, B., Giarre, L., Identification of linear parameter varying models (2002) Int. J. Robust Nonlinear Control, 12 (9), pp. 841-853Verdult, V., Verhaegen, M., Kernel methods for subspace identification of multivariable LPV and bilinear systems (2005) Automatica, 41 (9), pp. 1557-1565Felici, F., van Wingerden, J.W., Verhaegen, M., Subspace identification of MIMO LPV systems using a periodic scheduling sequence (2007) Automatica, 43 (10), pp. 1684-1697Steinbuch, M., van de Molengraft, R., der Voort, A., Experimental modelling and LPV control of a motion system (2003) Proc. 2003 Amer. Control Conf, pp. 1374-1379. , (Denver, CO, USA)Wassink, M.G., de Wal, M.V., Scherer, C., Bosgra, O., LPV control for a wafer stage: Beyond the theoretical solution (2005) Control Engineering Practice, 13 (2), pp. 231-245Lovera, M., Mercere, G., Identification for gain-scheduling: A balanced subspace approach (2007) Proc. 2007 Amer. Control Conf, pp. 858-863. , (New York, NY, USA) JulyPaijmans, B., Symens, W., Brussel, H.V., Swevers, J., Experimental identification of affine LPV models for mechatronic systems with one varying parameter (2008) European Journal of Control, 14 (1)De Caigny, J., Camino, J.F., Swevers, J., Interpolating model identification for SISO linear parameter varying systems (2008) Mechanical Systems and Signal Processing, , SubmittedBalas, G.J., Linear, parameter-varying control and its application to a turbofan engine (2002) Int. J. Robust Nonlinear Control, 12, pp. 763-796Shamma, J.S., Athans, M., Gain scheduling: Potential hazards and possible remedies (1992) IEEE Control Syst. Mag, 12 (3), pp. 101-107Emami-Naeini, A., Van Dooren, P., Computation of zeros of linear multivariable systems (1982) Automatica, 18 (4), pp. 415-430Kailath, T., (1980) Linear Systems, , Upper Saddle River, NJ, USA: Prentice-HallMoré, J.J., (1978) The Levenberg-marquardt Algorithm: Implementation and Theory, pp. 105-116. , in Numerical Analysis (G. A. Watson, ed.), vol. 630 of Lecture Notes in Mathematics, Springer Berlin/HeidelbergDonadon, L.V., Siviero, D.A., Camino, J.F., Arruda, J.R.F., Comparing a filtered-X LMS and an H2 controller for the attenuation of the sound radiated by a panel (2006) Proc. ISMA, , (Leuven, Belgium), SeptLaub, A., Heath, M., Paige, C., Ward, R., Computation of system balancing transformations and other applications of simultaneous diagonalization algorithms (1987) IEEE Trans. Autom. Control, 32 (2), pp. 115-12
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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