Results 11 to 20 of about 1,952,937 (282)

Spectrum Allocation of Cognitive Radio Based on Autonomy Evolutionary Algorithm

open access: yesCybernetics and Information Technologies, 2016
Reasonable and effective allocation of cognitive radio spectrum resource according to user’s requirements is the key task of cognitive radio network. Cognitive radio spectrum allocation problem can be viewed as an optimization problem.
Li Yongcheng, Shen Hai, Wang Manxi
doaj   +2 more sources

Capturing genetic variation in crop wild relatives: An evolutionary approach [PDF]

open access: yes, 2022
Crop wild relatives (CWRs) offer novel genetic resources for crop improvement. To assist in the urgent need to collect and conserve CWR germplasm, we advance here the concept of an “evolutionary” approach.
Paul A. Egan   +2 more
core   +1 more source

Is re-farming the answer to the spectrum shortage conundrum? [PDF]

open access: yes, 2008
Radio spectrum has become one of the engines of economic growth. However, rapid technological change, ever increasing demands for new wireless services and the nature of spectrum as a scarce resource necessitate an urgent re-examination of issues such as
Curwen, Peter   +2 more
core   +3 more sources

Notes on spectrum and exponential decay in nonautonomous evolutionary equations

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2016
We first determine the dichotomy (Sacker-Sell) spectrum for certain nonautonomous linear evolutionary equations induced by a class of parabolic PDE systems.
Christian Pötzsche, Evamaria Russ
doaj   +1 more source

Rate, spectrum, and evolutionary dynamics of spontaneous epimutations [PDF]

open access: yesProceedings of the National Academy of Sciences, 2015
Significance Changes in the methylation status of cytosine nucleotides are a source of heritable epigenetic and phenotypic diversity in plants. Here we derive robust estimates of the rate at which cytosine methylation is spontaneously gained (forward epimutation) or lost (backward epimutation) in the genome of the
van der Graaf, Adriaan   +8 more
openaire   +2 more sources

Selector for the Spectrum Award 2018

open access: yes, 2018
Billingham was invited to be part of the selection panel for the first Spectrum Award in 2018 alongside Mark Wallinger, Charming Baker, Professor Simon Baron-Cohen, Sacha Craddock and Mary Simpson.
Billingham, Richard, Spectrum
core   +3 more sources

Tracer spectrum: a visualisation method for distributed evolutionary computation [PDF]

open access: yesGenetic Programming and Evolvable Machines, 2010
We present a novel visualisation method for island-based evolutionary algorithms based on the concept of tracers as adopted in medicine and molecular biology to follow a biochemical process. For example, a radioisotope or dye can be used to replace a stable component of a biological compound, and the signal from the radioisotope can be monitored as it ...
Michael O'Neill 0001   +2 more
openaire   +3 more sources

Editorial Note: Impact of COVID-19 on Spectrum operations

open access: yes, 2020
To support our authors, reviewers and editors during the COVID-19 pandemic, the Spectrum Editorial Board has relaxed its timelines for the publication of this most recent issue (Issue 5).  We are working with our authors on their Issue 5 submissions,
Editorial Board, Spectrum
core   +1 more source

Hydration index and hydrated constitutive model of clay shale using acoustic frequency spectrum

open access: yesEnergy Science & Engineering, 2019
Clay shale is frequently encountered in drilling. With strong hydration capacity, when clay shale contacts with drilling fluid, rock structural and mechanical property will be affected, causing wellbore instability.
Xiangjun Liu   +3 more
doaj   +1 more source

STATISTICAL RESEARCH IN EVOLUTIONARY GENETIC RELATIONSHIP OF DMS-, DW-, KW- AND KE-TYPES OF DOUBLE STARS

open access: yesOdessa Astronomical Publications, 2017
Statistical relations as spectrum-period, mass of primary component-semi-major axes of an orbit, excesses of luminosity and radius-mass of component, Karetnikov's diagram, modern and initial distributions of the binaries in the 1 ps3 of Sun neighbourhood
G. N. Dryomova, M. A. Svechnikov
doaj   +1 more source

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