1,721,310 research outputs found
Biology-Based Neural Network Control of the Robotic Orthosis Lokomat
No full textThis report was written as part of a Semesterarbeit at the Department for Information Technologies and Electrical Engineering at ETH Zurich. The work was done at the Automatic Control Laboratory (Prof. M. Morari) and Paracare, University Clinic Balgris
Stability and stabilization of piecewise affine and hybrid systems
No full textIn this paper we present various algorithms both for stability analysis and
state-feedback design for discrete-time piecewise affine systems. As in (Johansson and Rantzer, 1998), our
approach hinges on the use of piecewise quadratic Lyapunov functions that can be computed
as the solution of a set of linear matrix inequalities. We show that the continuity of the
Lyapunov function is not required in the discrete-time case. Moreover, the basic algorithms
are made less conservative by exploiting the switching structure of piecewise affine
systems and by using relaxation procedures
Moving horizon estimation for hybrid systems
No full textIn this paper, by exploiting the equivalence between hybrid systems modeled in the Mixed Logic Dynamical form and Piece-Wise Affine systems, we propose a state smoothing algorithm based on Moving Horizon Estimation (MHE). We provide sufficient conditions on the time horizon and the initial penalties to guarantee asymptotic convergence of the MHE scheme. Moreover we propose an algorithm for the computation of the initial penalties that allows to implement MHE by solving Mixed-Integer Quadratic Programs
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
Optimizing control of simulated moving bed separations of misture subject to the generalized Langmuir isotherm
No full textExperimental implementation of automatic ‘cycle to cycle’ control of a chiral simulated moving bed separation
No full textVariations 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
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