Colors of noise ≈ Colors of noise
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False periodicities in quasar time-domain surveys Open
There have recently been several reports of apparently periodic variations in the light curves of quasars, e.g. PG 1302−102 by Graham et al. Any quasar showing periodic oscillations in brightness would be a strong candidate to be a close b…
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Color Channel Compensation (3C): A Fundamental Pre-Processing Step for Image Enhancement Open
This article introduces a novel solution to improve image enhancement in terms of color appearance. Our approach, called Color Channel Compensation (3C), overcomes artifacts resulting from the severely non-uniform color spectrum distributi…
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On the combined effect of periodic signals and colored noise on velocity uncertainties Open
peer reviewed
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Random dynamics of fractional nonclassical diffusion equations driven by colored noise Open
The random dynamics in $ H^s(\mathbb{R}^n) $ with $ s\in (0,1) $ is investigated for the fractional nonclassical diffusion equations driven by colored noise. Both existence and uniqueness of pullback random attractors are established for t…
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Noise spectral estimation methods and their impact on gravitational wave measurement of compact binary mergers Open
Estimating the parameters of gravitational wave signals detected by\nground-based detectors requires an understanding of the properties of the\ndetectors' noise. In particular, the most commonly used likelihood function for\ngravitational …
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Stochastic Modeling of Multiwavelength Variability of the Classical BL Lac Object OJ 287 on Timescales Ranging from Decades to Hours Open
We present the results of our power spectral density analysis for the BL Lac object OJ 287, utilizing the Fermi -LAT survey at high-energy γ -rays, Swift -XRT in X-rays, several ground-based telescopes and the Kepler satellite in the optic…
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Asymptotic behavior of random fitzhugh-nagumo systems driven by colored noise Open
In this paper, we prove the existence and uniqueness of random attractors for the FitzHugh-Nagumo system driven by colored noise with a nonlinear diffusion term. We demonstrate that the colored noise is much easier to deal with than the wh…
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Extracting information from AGN variability Open
AGN exhibit rapid, high amplitude stochastic flux variations across the\nentire electromagnetic spectrum on timescales ranging from hours to years. The\ncause of this variability is poorly understood. We present a Green's\nFunction-based m…
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Output-only parameter identification of a colored-noise-driven Van-der-Pol oscillator: Thermoacoustic instabilities as an example Open
The problem of output-only parameter identification for nonlinear oscillators forced by colored noise is considered. In this context, it is often assumed that the forcing noise is white, since its actual spectral content is unknown. The im…
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Generalized Ornstein-Uhlenbeck model for active motion Open
We investigate a one-dimensional model of active motion, which takes into account the effects of persistent self-propulsion through a memory function in a dissipative-like term of the generalized Langevin equation for particle swimming vel…
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Blue noise sampling using an SPH-based method Open
We propose a novel algorithm for blue noise sampling inspired by the Smoothed Particle Hydrodynamics (SPH) method. SPH is a well-known method in fluid simulation -- it computes particle distributions to minimize the internal pressure varia…
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Specific Relationship between the Shape of the Readiness Potential, Subjective Decision Time, and Waiting Time Predicted by an Accumulator Model with Temporally Autocorrelated Input Noise Open
Self-initiated movements are reliably preceded by a gradual buildup of neuronal activity known as the readiness potential (RP). Recent evidence suggests that the RP may reflect subthreshold stochastic fluctuations in neural activity that c…
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A Tensor-Based Covariance Differencing Method for Direction Estimation in Bistatic MIMO Radar With Unknown Spatial Colored Noise Open
In this paper, we investigate into direction estimation in bistatic multiple-input multiple-output (MIMO) radar in the presence of unknown spatial colored noise. Taking the stationary property of the spatial colored noise into consideratio…
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Improvements in the Monthly Gravity Field Solutions Through Modeling the Colored Noise in the GRACE Data Open
The Gravity Recovery And Climate Experiment (GRACE) mission has achieved a quantum leap in knowledge of the Earth's gravity field. However, current gravity field solutions still cannot reach the prelaunch baseline accuracy. One of the reas…
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Magnetic Anomaly Detection Based on Full Connected Neural Network Open
Magnetic anomaly detection (MAD) has been widely used for detecting some hidden ferromagnetic objects. Orthonormal basis function (OBFs) detector is one of the most popular methods of MAD. The OBFs detector works effectively under white Ga…
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Chameleonic Noise in GPS Position Time Series Open
It has been a standard practice for about 2 decades to compute global positioning system (GPS)‐based station velocity uncertainties using the apparent noise statistics of the non‐linear position residuals rather than assume white noise (WN…
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An investigation of pulsar searching techniques with the fast folding algorithm Open
Here, we present an in-depth study of the behaviour of the fast folding algorithm (FFA), an alternative pulsar searching technique to the fast Fourier transform (FFT). Weaknesses in the FFT, including a susceptibility to red noise, leave i…
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Modulated escape from a metastable state driven by colored noise Open
Many phenomena in nature are described by excitable systems driven by colored noise. The temporal correlations in the fluctuations hinder an analytical treatment. We here present a general method of reduction to a white-noise system, captu…
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Converged Colored Noise Path Integral Molecular Dynamics Study of the Zundel Cation Down to Ultralow Temperatures at Coupled Cluster Accuracy Open
For a long time, performing converged path integral simulations at ultralow but finite temperatures of a few Kelvin has been a nearly impossible task. However, recent developments in advanced colored noise thermostatting schemes for path i…
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Noise Analysis and Modeling in Visible Light Communication Using Allan Variance Open
Visible Light Communication (VLC) is a rising communication technology which uses Light-Emitting Diode (LED) luminaries for high-speed data transferring; however, the optical signal is usually degraded by the noise in the practical VLC sys…
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Effective equilibrium states in mixtures of active particles driven by colored noise Open
We consider the steady-state behavior of pairs of active particles having different persistence times and diffusivities. To this purpose we employ the active Ornstein-Uhlenbeck model, where the particles are driven by colored noises with e…
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Impact of environmental colored noise in single-species population dynamics Open
Variability on external conditions has important consequences for the dynamics and the organization of biological systems. In many cases, the characteristic timescale of environmental changes as well as their correlations play a fundamenta…
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Stochastic P-bifurcations in tri-stable van der Pol-Duffing oscillator with multiplicative colored noise Open
This article aims at studying the stochastic P-bifurcation of tri-stable van der Pol-Duffing oscillator subjected to multiplicative colored noise. First, the stationary probability density of amplitude is derived by using the stochastic av…
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High Accuracy Power Quality Evaluation under a Colored Noisy Condition by Filter Bank ESPRIT Open
Due to the highly increasing integration of renewable energy sources with the power grid and their fluctuations, besides the recent growth of new power electronics equipment, the noise in power systems has become colored. The colored noise…
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Mitigating flicker noise in high-precision photometry Open
Context. In photometry, the short-timescale stellar variability (“flicker”), such as that caused by granulation and solar-like oscillations, can reach amplitudes comparable to the transit depth of Earth-sized planets and is correlated over…
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A Search for Quasi-periodic Oscillations in the Blazar 1ES 1959+650 Open
We have searched quasi-periodic oscillations (QPOs) in the 15 GHz light curve of the BL Lac object 1ES 1959+650 monitored by the Owens Valley Radio Observatory 40 m telescope during the period from 2008 January to 2016 February, using the …
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Effects of Spatiotemporal Filtering on the Periodic Signals and Noise in the GPS Position Time Series of the Crustal Movement Observation Network of China Open
Analysis of Global Positioning System (GPS) position time series and its common mode components (CMC) is very important for the investigation of GPS technique error, the evaluation of environmental loading effects, and the estimation of a …
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A Novel Adaptive Kalman Filter With Colored Measurement Noise Open
In this paper, a novel variational Bayesian-based adaptive Kalman filter (VBAKF) is proposed to solve the problem of a linear state-space model with colored measurement noise and inaccurate noise covariance matrices. The filter problem of …
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Sensitivity of Seismic Noise Correlation Functions to Global Noise Sources Open
Surface waves in seismic noise correlation functions are routinely exploited for tomographic studies. However, the observation and proper interpretation of body waves is considerably more difficult. To understand body wave generation in pa…
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Texton Noise Open
Designing realistic noise patterns from scratch is hard. To solve this problem, recent contributions have proposed involved spectral analysis algorithms that enable procedural noise models to faithfully reproduce some class of textures. Th…