Results 21 to 30 of about 1,854,912 (269)
Time varying undirected graphs [PDF]
Machine Learning, 2010 Undirected graphs are often used to describe high dimensional distributions. Under sparsity conditions, the graph can be estimated using ℓ1 penalization methods. However, current methods assume that the data are independent and identically distributed. If the distribution, and hence the graph, evolves over time then the data are not longer identically ...
Zhou, Shuheng +2 more
openaire +4 more sources
An Adaptive Time-Varying Impedance Controller for Manipulators
Frontiers in Neurorobotics, 2022 Aiming at the situation that the structural parameters of the general manipulators are uncertain, a time-varying impedance controller based on model reference adaptive control (MRAC) is proposed in this article.
Xu Liang +10 more
doaj +1 more source
Mapping the time-varying functional brain networks in response to naturalistic movie stimuli
Frontiers in Neuroscience, 2023 One of human brain’s remarkable traits lies in its capacity to dynamically coordinate the activities of multiple brain regions or networks, adapting to an externally changing environment.
Limei Song +5 more
doaj +1 more source
Time-varying contour topology [PDF]
IEEE Transactions on Visualization and Computer Graphics, 2006 The contour tree has been used to compute the topology of isosurfaces, generate a minimal seed set for accelerated isosurface extraction, and provide a user interface to segment individual contour components in a scalar field. In this paper, we extend the benefits of the contour tree to time-varying data visualization. We define temporal correspondence
Bong-Soo Sohn, Chandrajit L. Bajaj
openaire +3 more sources
Can gold hedge the risk of fear sentiments?
Technological and Economic Development of Economy, 2022 This paper investigates the interaction between fear sentiments and gold price (GP) by utilising the full-sample and sub-sample rolling-window bootstrap causality tests.
Chi-Wei Su +3 more
doaj +1 more source
Components in time-varying graphs [PDF]
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2012 Real complex systems are inherently time-varying. Thanks to new communication systems and novel technologies, today it is possible to produce and analyze social and biological networks with detailed information on the time of occurrence and duration of each link.
Nicosia Vincenzo +5 more
openaire +5 more sources
Time-varying gravitomagnetism [PDF]
Classical and Quantum Gravity, 2008 10 pages; v2: slightly expanded version accepted for publication in Class.
openaire +2 more sources
Photonics of time-varying media [PDF]
Advanced Photonics, 2022 Time-varying media have recently emerged as a new paradigm for wave manipulation, thanks to thesynergy between the discovery of novel, highly nonlinear materials, such as epsilon-near-zero materials, and the questfor novel wave applications, such as magnet-free nonreciprocity, multi-mode light shaping, and ultrafast switching.
Galiffi, Emanuele +9 more
openaire +2 more sources
Time varying price discovery [PDF]
Economics Letters, 2013 We show how multivariate GARCH models can be used to generate a time-varying “information share” (Hasbrouck, 1995) to represent the changing patterns of price discovery in closely related securities. We find that time-varying information shares can improve credit spread predictions.
Avino, Davide +2 more
openaire +3 more sources
IEEE AccessTo achieve a more reliable strategy for power systems, the stochastic behavior of uncertain parameters should be considered. Numerous frameworks have been proposed to derive robust solutions against uncertain resources.
Milad Eslahi +2 more
doaj +1 more source