Results 81 to 90 of about 286,009 (201)

Randomised aerial-pattern autocorrelation function

open access: yesElectronics Letters, 1966
The angular autocorrelation function of a circular-aerial radiation pattern has been measured. This shows that, even for a non-beam-forming radiation pattern, angular discrimination appropriate to the size of the aerial can be achieved by finding the autocorrelation function of the pattern.
P.A. Matthews, K. Essuman
openaire   +1 more source

Application of correlation methods for an investigation of the acoustic field in a room

open access: yesArchives of Acoustics, 2014
The aim of the present work is presenting the possibilities of applying the autocorrelation function of a room defined by Kuttruff for the estimation of some acoustic properties of rooms with various geometries.
K. ŚRODECKI, A. ŚLIWIŃSKI
doaj  

Spin facilitated Ising model with long range interaction

open access: yes, 2004
We study the dynamics of a spin facilitated Ising model with long range kinetic constraints. To formulate those restrictions within an analytical approach we introduce the size of a kinetic active environment of a given spin.
Beatrix M. Schulz   +29 more
core   +1 more source

Relation between the autocorrelation and Wigner functions

open access: yes, 2013
We show a simple mechanism to measure the Wigner function of a harmonic oscillator. For this system we also show that autocorrelation and Wigner functions are equivalent.Comment: Modified title and slightly modified version from the one ...
Christodoulides, Demetrios N.   +1 more
core   +1 more source

Signal Detection for QPSK Based Cognitive Radio Systems using Support Vector Machines [PDF]

open access: yesRadioengineering, 2015
Cognitive radio based network enables opportunistic dynamic spectrum access by sensing, adopting and utilizing the unused portion of licensed spectrum bands.
M. T. Mushtaq   +3 more
doaj  

Yarn-Dyed Fabric Defect Detection Based On Autocorrelation Function And GLCM

open access: yesAUTEX Research Journal, 2015
In this study, a new detection algorithm for yarn-dyed fabric defect based on autocorrelation function and grey level co-occurrence matrix (GLCM) is put forward.
Zhu Dandan   +3 more
doaj   +1 more source

Spin dynamics of quantum and classical Heisenberg dimers

open access: yes, 1999
Analytical solutions for the time-dependent autocorrelation function of the classical and quantum mechanical spin dimer with arbitrary spin are presented and compared. For large spin quantum numbers or high temperature the classical and the quantum dimer
D Mentrup   +13 more
core   +1 more source

Development and Study of Demodulation Techniques for Frequency Manipulated Signals

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2017
The goal of our research is development and study of different demodulation techniques for a frequency shift keyed signals. The signal under study is a frequency-shift keyed (FSK) signal when the information signal regulates the carrier frequency.
D. I. Kaplun   +7 more
doaj  

Characterization of a quantum phase transition in Dirac systems by means of the wave-packet dynamics

open access: yesAIP Advances, 2012
We study the signatures of phase transitions in the time evolution of wave-packets by analyzing two simple model systems: a graphene quantum dot model in a magnetic field and a Dirac oscillator in a magnetic field.
E. Romera, J. J. Torres
doaj   +1 more source

Uncertainty of Wave Spectral Shape and Parameters Associated with the Spectral Estimation

open access: yesJournal of Marine Science and Engineering
The uncertainty in estimating the wave spectrum from the records of wave elevation by heave–pitch–roll buoys is studied, considering the effects of the estimation method and the spectral resolution adopted in the process.
Guilherme Clarindo   +2 more
doaj   +1 more source

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