1,721,300 research outputs found
ESI Group Simulations
No full textHeated 3D section: Automated Tape Placement Model
and
Structure Metal Tape Laying FPM-mode
Numerical experiments on unsupervised manifold learning applied to mechanical modeling of materials and structures
Get PDFThe present work aims at analyzing issues related to the data manifold dimensionality. The interest of the study is twofold: (i) first, when too many measurable variables are considered, manifold learning is expected to extract useless variables; (ii) second, and more important, the same technique, manifold learning, could be utilized for identifying the necessity of employing latent extra variables able to recover single-valued outputs. Both aspects are discussed in the modeling of materials and structural systems by using unsupervised manifold learning strategies.The first, third, and fourth authors are supported by their respective ESI Group research chairs; their support is gratefully acknowledged. The first author is supported by CREATE-ID ESI-ENSAM research chair. The third author is supported by the ESI Group Chair at the University of Zaragoza. The fourth author is supported by CREATE-ID ESI-ENSAM research chair
Virtuelle Tests autonomer Funktionen durch Simulation
No full textDie Validierung der Wahrnehmungsfunktionen für autonomes Fahren ist äußerst komplex. ESI Group zeigt, wie mit einer Simulationsplattform ein Fahrzeug-Lidar simuliert und auf unterschiedliche Witterungseinflüsse reagieren muss. Sobald virtuelle Tests reale Fahrfunktionen sicher abbilden können, werden sich reale Tests künftig deutlich reduzieren lassen
Optimisation numérique d'une suspension de véhicule en sollicitation dynamique
No full textLe prototypage virtuel joue un rôle important à chaque étape de
la conception dans le secteur automobile.
Dans ce domaine, le laboratoire de structures et matériaux de l'ESTACA,
école d'ingénieur, travaille à la mise en place d'une
méthodologie d'analyse mécanique d'une suspension avant de
véhicule sous sollicitation dynamique. Cette étude est
réalisée en collaboration avec la société ESI-GROUP qui
développe et distribue le code Pam-Medysa 2G.
Ce travail présente les évolutions successives apportées au
modèle de suspension à l'aide de cet outil numérique. À partir
d'une première étape de définition de la cinématique du
système, différentes améliorations du modèle sont
réalisées avec la prise en compte de façon locale du
comportement physique (déformation, contraintes dans les composants les
plus critiques).
Le couplage entre deux approches, l'une globale purement cinématique et
l'autre locale par éléments-finis, permet une amélioration du
caractère prédictif de la simulation tout en optimisant la durée
du calcul explicite dynamique
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Clinical findings related to patient outcome in the transforaminal ESI group.
No full textClinical findings related to patient outcome in the transforaminal ESI group.</p
MRI findings related to patient outcome in the transforaminal ESI group.
No full textMRI findings related to patient outcome in the transforaminal ESI group.</p
Variations on the Author
Get PDF“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
Get PDFWe 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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