Results 11 to 20 of about 649 (213)

Noncommutative Fourier Analysis on Invariant Subspaces: Frames of Unitary Orbits and Hilbert Modules over Group von Neumann Algebras

open access: yesBruno Pini Mathematical Analysis Seminar, 2016
This is a joint work with E. Hernández, J. Parcet and V. Paternostro. We will discuss the structure of bases and frames of unitary orbits of discrete groups in invariant subspaces of separable Hilbert spaces.
Davide Barbieri
doaj   +1 more source

弱离散Koszul模(Weakly discrete Koszul modules)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2014
The discrete Koszulity of finitely generated graded modules is discussed over a discrede Koszul algebra and the notion of weakly discrete Koszul module is introduced.
PANYuan(潘媛)
doaj   +1 more source

Witt group of Hermitian forms over a noncommutative discrete valuation ring

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2005
We investigate Hermitian forms on finitely generated torsion modules over a noncommutative discrete valuation ring. We also give some results for lattices, which still are satisfied even if the base ring is not commutative. Moreover, for a noncommutative
L. Oukhtite
doaj   +1 more source

A geometric attractor mechanism for self-organization of entorhinal grid modules

open access: yeseLife, 2019
Grid cells in the medial entorhinal cortex (MEC) respond when an animal occupies a periodic lattice of ‘grid fields’ in the environment. The grids are organized in modules with spatial periods, or scales, clustered around discrete values separated on ...
Louis Kang, Vijay Balasubramanian
doaj   +1 more source

A modulator for discrete trains of pulses [PDF]

open access: yesElectroencephalography and Clinical Neurophysiology, 1965
Abstract A circuit is described which provides a means of modulating trains of pulses of duration from 1 msec up to 1.5 sec. This device was especially designed for use with Grass Instruments Co. stimulators so that only one stimulator is needed for generating trains of pulses.
openaire   +3 more sources

Stochastic Timed Discrete-Event Systems: Modular Modeling and Performance Evaluation Through Markovian Jumps

open access: yesIEEE Access, 2022
We are interested in a scalable, flexible, and modular methodology, for modeling and performance analysis of stochastic discrete-event systems (SDES).
Carlos-Andrey Maia
doaj   +1 more source

Theorems for discrete filtered modulated signals [PDF]

open access: yesIEEE International Conference on Acoustics Speech and Signal Processing, 1993
Useful approximations to the responses of discrete linear systems and certain discrete nonlinear systems are developed for input complex AM-FM signals of the form s(m)=a(m) exp (j phi (m)). These are used to derive limits on simple AM-FM demodulation mechanisms related to the Teager-Kaiser operator. >
Alan C. Bovik   +2 more
openaire   +2 more sources

Continuous g-Frame in Hilbert C∗-Modules

open access: yesAbstract and Applied Analysis, 2011
We give a generalization of g-frame in Hilbert C∗-modules that was introduced by Khosravies then investigated some properties of it by Xiao and Zeng. This generalization is a natural generalization of continuous and discrete g-frames and frame in Hilbert
Mehdi Rashidi Kouchi, Akbar Nazari
doaj   +1 more source

A New Modular Petri Net for Modeling Large Discrete-Event Systems: A Proposal Based on the Literature Study

open access: yesComputers, 2019
Petri net is a highly useful tool for modeling of discrete-event systems. However, Petri net models of real-life systems are enormous, and their state-spaces are usually of infinite size. Thus, performing analysis on the model becomes difficult.
Reggie Davidrajuh
doaj   +1 more source

Socioeconomic factors and parents' preferences for internet- and mobile-based parenting interventions to prevent youth mental health problems: A discrete choice experiment

open access: yesInternet Interventions, 2022
Background: The positive impact of parenting programs for youth mental health is undermined by difficulties engaging parents. Low engagement disproportionately impacts parents of lower-socioeconomic positions (SEPs).
Grace Broomfield   +2 more
doaj   +1 more source

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