Articles with "using nonlinear" as a keyword



Fast and silent MRI using nonlinear gradient fields at the ultrasonic gradient switching frequency of 20 kHz with a Point Spread Function framework reconstruction

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Published in 2024 at "Magnetic Resonance in Medicine"

DOI: 10.1002/mrm.30230

Abstract: To demonstrate the feasibility of using a nonlinear gradient field for spatial encoding at the ultrasonic switching frequency of 20 kHz and present a framework to reconstruct data acquired in this way. read more here.

Keywords: frequency khz; using nonlinear; switching frequency; gradient ... See more keywords

Comparison of classical tumour growth models for patient derived and cell-line derived xenografts using the nonlinear mixed-effects framework

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Published in 2022 at "Journal of Biological Dynamics"

DOI: 10.1080/17513758.2022.2061615

Abstract: In this study we compare seven mathematical models of tumour growth using nonlinear mixed-effects which allows for a simultaneous fitting of multiple data and an estimation of both mean behaviour and variability. This is performed… read more here.

Keywords: mixed effects; tumour growth; growth; using nonlinear ... See more keywords

Fuzzy Neural Super-Twisting Sliding-Mode Control of Active Power Filter Using Nonlinear Extended State Observer

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Published in 2024 at "IEEE Transactions on Systems, Man, and Cybernetics: Systems"

DOI: 10.1109/tsmc.2023.3310593

Abstract: To improve the tracking performance of the current controller of active power filter (APF) system, an adaptive super-twisting (ASTW) acrlong SMC using a nonlinear extended state observer (NESO) based on an interval type-2 fuzzy neural… read more here.

Keywords: active power; using nonlinear; power filter; super twisting ... See more keywords

Simulation of disequilibrium and chaos in aggregates of disposable income, wealth, and consumption in EU macroeconomics using nonlinear dynamic analysis

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Published in 2022 at "SIMULATION"

DOI: 10.1177/00375497221130100

Abstract: Economic disequilibrium theory (DT) more realistically represents modern macroeconomic systems than general equilibrium theory. DT coupled with applied mathematical economics and nonlinear dynamical analysis generates multi-dimensional phase spaces. Interdependencies of endogenous variables in state space… read more here.

Keywords: using nonlinear; analysis; simulation disequilibrium; macroeconomics ... See more keywords
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Improving spring–mass parameter estimation in running using nonlinear regression methods

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Published in 2021 at "Journal of Experimental Biology"

DOI: 10.1242/jeb.232850

Abstract: ABSTRACT Runners are commonly modeled as spring–mass systems, but the traditional calculations of these models rely on discrete observations during the gait cycle (e.g. maximal vertical force) and simplifying assumptions (e.g. leg length), challenging the… read more here.

Keywords: mass; spring mass; using nonlinear; parameter ... See more keywords
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Enhanced sensing of millicharged particles using nonlinear effects in an optomechanical system.

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Published in 2018 at "Optics express"

DOI: 10.1364/oe.26.002054

Abstract: Particles with electric charge 10-14 e in bulk mass are not excluded by present experiments. In the present letter we provide a feasible scheme to measure the millicharged particles via the optical cavity coupled to… read more here.

Keywords: particles using; enhanced sensing; nonlinear effects; millicharged particles ... See more keywords

Secure Communications using Nonlinear Silicon Photonic Keys

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Published in 2018 at "Optics express"

DOI: 10.1364/oe.26.004710

Abstract: We present a secure communication system constructed using pairs of nonlinear photonic physical unclonable functions (PUFs) that harness physical chaos in integrated silicon micro-cavities. Compared to a large, electronically stored one-time pad, our method provisions… read more here.

Keywords: micro cavity; communications using; using nonlinear; secure communications ... See more keywords

Scaling of Hydraulic Functions in Heterogeneous Soil Using Nonlinear Least Squares Minimization Method

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Published in 2018 at "Current Science"

DOI: 10.18520/cs/v114/i05/1046-1054

Abstract: Presenting soil heterogeneity precisely in various spatial scales is the main key to simulate water and solute transport through it. The method described by Richards is mostly used to study water flow through vadose zone.… read more here.

Keywords: heterogeneous soil; hydraulic functions; nonlinear least; method ... See more keywords

A Novel Sensing Method to Detect Malachite Green Contaminant on Silicon Substrate Using Nonlinear Optics

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Published in 2024 at "Micromachines"

DOI: 10.3390/mi15101227

Abstract: We propose a nonlinear-optics-based nanosensor to detect malachite green (MG) contaminants on semiconductor interfaces such as silicon (Si). Applying the simplified bond hyperpolarizability model (SBHM), we simplified the second-harmonic generation (SHG) analysis of an MG-Si(111)… read more here.

Keywords: detect malachite; malachite green; using nonlinear; optics ... See more keywords