Results 71 to 80 of about 1,088,206 (196)

Machine-learning classification with additivity and diverse multifractal pathways in multiplicativity

Physical Review Research
Evidence of multifractal structures has spread to a wider set of physiological time series supporting the intricate interplay of biological and psychological functioning.
Madhur Mangalam, Henrik Seckler, Damian G. Kelty-Stephen   +2 more
doaj   +1 more source

Theoretical and experimental analysis of phase noise in semiconductor lasers biased below threshold

JPhys Photonics
We report a theoretical and experimental study of phase noise in semiconductor lasers when the bias current is below the threshold value. The theoretical study is performed by using two types of rate equations, with additive and multiplicative noise ...
Iker Pascual de Zulueta, Angel Valle
doaj   +1 more source

A Simplified Convex Optimization Model for Image Restoration with Multiplicative Noise. [PDF]

J Imaging, 2023
Che H, Tang Y.
europepmc   +1 more source

Image Enhancement under Data-Dependent Multiplicative Gamma Noise

Applied Computational Intelligence and Soft Computing, 2014
An edge enhancement filter is proposed for denoising and enhancing images corrupted with data-dependent noise which is observed to follow a Gamma distribution. The filter is equipped with three terms designed to perform three different tasks.
Jidesh Pacheeripadikkal, Bini Anattu
doaj   +1 more source

Speckle Reduction on Ultrasound Liver Images Based on a Sparse Representation over a Learned Dictionary

Applied Sciences, 2018
Ultrasound images are corrupted with multiplicative noise known as speckle, which reduces the effectiveness of image processing and hampers interpretation.
Mohamed Yaseen Jabarulla, Heung-No Lee
doaj   +1 more source

Recursive linear estimation for discrete time systems in the presence of different multiplicative observation noises [PDF]

This paper describes a design for a least mean square error estimator in discrete time systems where the components of the state vector, in measurement equation, are corrupted by different multiplicative noises in addition to observation noise.
Tere M. García-Muñoz, Carlos Sánchez-González   +1 more
core  

Sigma-Point Particle Filter for Parameter Estimation in a Multiplicative Noise Environment

Journal of Advances in Modeling Earth Systems, 2011
A pre-requisite for the “optimal estimate” by the ensemble-based Kalman filter (EnKF) is the Gaussian assumption for background and observation errors, which is often violated when the errors are multiplicative, even for a linear system. This study first
Youmin Tang, Jaison Thomas Ambadan
doaj  

Feedback Loops in Opinion Dynamics of Agent-Based Models with Multiplicative Noise. [PDF]

Entropy (Basel), 2022
Djurdjevac Conrad N, Köppl J, Djurdjevac A.   +2 more
europepmc   +1 more source

Quasi-exact Approximation of Hidden Markov Chain Filters [PDF]

This paper studies the application of exact simulation methods for multi-dimensional multiplicative noise stochastic differential equations to filtering.
Eckhard Platen, Renata Rendek
core