Search results for "window function"

showing 6 items of 6 documents

Transient dynamics of pulse-driven memristors in the presence of a stable fixed point

2019

Abstract Some memristors are quite interesting from the point of view of dynamical systems. When driven by narrow pulses of alternating polarities, their dynamics has a stable fixed point, which may be useful for future applications. We study the transient dynamics of two types of memristors characterized by a stable fixed point using a time-averaged evolution equation. Time-averaged trajectories of the Biolek window function memristor and resistor-threshold type memristor circuit (an effective memristor) are determined analytically, and the times of relaxation to the stable fixed point are found. Our analytical results are in perfect agreement with the results of numerical simulations.

FOS: Computer and information sciencesDynamical systems theoryFOS: Physical sciencesComputer Science - Emerging TechnologiesMemristorFixed point01 natural sciencesWindow function010305 fluids & plasmaslaw.inventionMemristive systemComputer Science::Hardware ArchitectureComputer Science::Emerging TechnologieslawStablefixed pointMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesAttractorStatistical physics010306 general physicsPhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsAttractorMemristorResistance switching memoryCondensed Matter PhysicsAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsPulse (physics)Emerging Technologies (cs.ET)Relaxation (physics)Transient (oscillation)Physica E-Low-Dimensional Systems & Nanostructures
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Non-linear systems under parametric white noise input: digital simulation and response

2005

Abstract Monte Carlo technique is constituted of three steps. Therefore, improving such technique in practice means, improving the procedure used in one of the three following steps: (i) sample paths of the stochastic input process, (ii) calculation of the outputs corresponding to the generated input samples by using methods of classical dynamics and (iii) estimating statistics of the output process from sample outputs related to the previous step. For linear and non-linear systems driven by parametric impulsive inputs such as normal or non-normal white noises, a general integration method requires a considerable reduction of the integration step when the impulse occurs, treating the impuls…

Mathematical optimizationApplied MathematicsMechanical EngineeringMonte Carlo methodα-stable white noiseParametric impulseWhite noiseImpulse (physics)Poissonian white noiseWindow functionα-stable white noise; Normal white noise; Parametric impulse; Poissonian white noiseNonlinear systemMechanics of MaterialsMonte Carlo integrationQuasi-Monte Carlo methodAlgorithmParametric statisticsMathematicsNormal white noise
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Spectrogram Analysis of Non-Stationary RSE-to-Car Channels Behaviour for Braking Situations

2017

Master's thesis Information- and communication technology IKT590 - University of Agder 2017 Car-to-car (C2C) and car-to-infrastructure (C2I) communications promise revolutionary improvements in transportation due to its possibilities to improve the road safety and tra c management. C2C is a system designed to exchange information between vehicles, and C2I is a communication model that allows vehicles to share information with the infrastructure such as roadside equipment (RSE). These communications are considered as essential elements of the intelligent transport system (ITS). In this regard, reliability of the communication is vital to provide warning of an impending accident. Thus, the an…

STFTIKT590spectrogramwindow lengthauto-termbrakingcross-termVDP::Teknologi: 500::Informasjons- og kommunikasjonsteknologi: 550window functionwindowing
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Algorithm To Calculate Heart Rate By Removing Touch Errors And Algorithm Analysis

2018

Heart rate is one of the important physiological parameter to measure the stability of the health. This study shows analysis of a proposed algorithm to calculate heart rate with miss touch errors to make it more efficient. Android Smart phone with good quality camera has come to reach of common people and has become one of the most necessary and powerful device for today and of course, for future generation. We can use its powerful features to solve or assess heart state monitoring through capturing necessary data in the form of image. Mobile camera has a photo emitting diode and a photo detector. Light source illuminates the tissue and photo-detector calculates the small intensity variatio…

Signal processingComputer science020208 electrical & electronic engineering010401 analytical chemistryFast Fourier transformComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONPhotodetector02 engineering and technology01 natural sciencesWindow function0104 chemical sciences0202 electrical engineering electronic engineering information engineeringMATLABInfinite impulse responseAlgorithmcomputerHann functionSmoothingcomputer.programming_language2018 International Conference on Circuits and Systems in Digital Enterprise Technology (ICCSDET)
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Importance of the Window Function Choice for the Predictive Modelling of Memristors

2021

Window functions are widely employed in memristor models to restrict the changes of the internal state variables to specified intervals. Here, we show that the actual choice of window function is of significant importance for the predictive modelling of memristors. Using a recently formulated theory of memristor attractors, we demonstrate that whether stable fixed points exist depends on the type of window function used in the model. Our main findings are formulated in terms of two memristor attractor theorems, which apply to broad classes of memristor models. As an example of our findings, we predict the existence of stable fixed points in Biolek window function memristors and their absenc…

State variableComputer science02 engineering and technologyMemristorType (model theory)Fixed pointTopologyWindow functionlaw.inventionPredictive modelsComputer Science::Hardware ArchitectureComputer Science::Emerging TechnologiesMathematical modellawAttractor0202 electrical engineering electronic engineering information engineeringEvolution (biology)Electrical and Electronic EngineeringPolarity (mutual inductance)threshold voltage020208 electrical & electronic engineeringmemristive systemsBiological system modeling020206 networking & telecommunicationsWindow functionmemristorsIntegrated circuit modelingPredictive modellingIEEE Transactions on Circuits and Systems Ii-Express Briefs
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Calculate Pulse from Touch Error Free PPG Signal with 2ndOrder Butterworth Filter

2021

With the ongoing heart problems of the population worldwide, the medical requirements of the people are expected to increase. Electrocardiogram (ECG) is one of the proven to capture the heart response signal to assess the electrical and muscular functions of the heart. The ECG setup is expensive and needs proper training, and of course, it is not instant. For fast, accurate heart parameter monitoring, scientists pay attention to the photoplethysmogram signal (PPG), based on the light intensity of a particular wavelength. Android smartphone with a good quality camera has come to ordinary people's reach and has become one of the most necessary and rugged devices for today and future generatio…

education.field_of_studyComputer sciencebusiness.industryPopulationButterworth filterFilter (signal processing)SignalWindow functionLight intensitySampling (signal processing)PhotoplethysmogramComputer visionArtificial intelligencebusinesseducation2021 International Conference on Electrical, Computer, Communications and Mechatronics Engineering (ICECCME)
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