Results 21 to 30 of about 165,941 (265)

Bearing Fault Signal Analysis Based on an Adaptive Multiscale Combined Morphological Filter

open access: yesInternational Journal of Rotating Machinery, 2020
Bearing fault signal analysis is an important means of bearing fault diagnosis. To effectively eliminate noise in a fault signal, an adaptive multiscale combined morphological filter is proposed based on the theory of mathematical morphology.
Chun Lv   +4 more
doaj   +1 more source

Robust adaptive cubature Kalman filter for tracking manoeuvring target by wireless sensor network under noisy environment

open access: yesIET Radar, Sonar & Navigation, 2023
The existing adaptive Kalman filters for tracking manoeuvring targets by wireless sensor networks can easily lose robustness when both the measurement and process noises are unknown and time‐varying, resulting in large positioning errors.
Xuming Fang, Dandan Huang
doaj   +1 more source

Performance Enhancement of Face Recognition under High-Density Noise Using PCA and De-Noising Technique

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2020
       There are many techniques for face recognition which compare the desired face image with a set of faces images stored in a database. Most of these techniques fail if faces images are exposed to high-density noise.
Nada Jasim Habeeb
doaj   +1 more source

Adaptive Federated IMM Filter for AUV Integrated Navigation Systems

open access: yesSensors, 2020
High accuracy and reliable navigation in the underwater environment is very critical for the operations of autonomous underwater vehicles (AUVs). This paper proposes an adaptive federated interacting multiple model (IMM) filter, which combines adaptive ...
Weiwei Lyu   +2 more
doaj   +1 more source

Adaptive federated filter for multi-sensor nonlinear system with cross-correlated noises.

open access: yesPLoS ONE, 2021
This paper presents an adaptive approach to the federated filter for multi-sensor nonlinear systems with cross-correlations between process noise and local measurement noise.
Lijun Wang, Sisi Wang, Wenzhi Yang
doaj   +1 more source

Adaptive Kalman Filtering

open access: yesJournal of Research of the National Bureau of Standards, 1985
The increased power of small computers makes the use of parameter estimation methods attractive. Such methods have a number of uses in analytical chemistry. When valid models are available, many methods work well, but when models used in the estimation are in error, most methods fail.
Brown, Steven D., Rutan, Sarah C.
openaire   +3 more sources

Comparison of Motion Artefact Reduction Methods and the Implementation of Adaptive Motion Artefact Reduction in Wearable Electrocardiogram Monitoring

open access: yesSensors, 2020
A motion artefact is a kind of noise that exists widely in wearable electrocardiogram (ECG) monitoring. Reducing motion artefact is challenging in ECG signal preprocessing because the spectrum of motion artefact usually overlaps with the very important ...
Xiang An, George K. Stylios
doaj   +1 more source

Two Stage Kalman Estimators with Probabilistically Weighted Average [PDF]

open access: yesEngineering and Technology Journal, 2009
With spherical coordinate, the adaptive estimation using multiple model filtering isenhanced in this paper. The enhancement is achieved by using just two depended parallelKalman filters, instead of multiple models, with the probabilistically weighted ...
Hanady Abbas Jaber
doaj   +1 more source

A Zero-Velocity Update Method for Adaptive Particle Filtering

open access: yesXibei Gongye Daxue Xuebao, 2020
Aiming at the low precision of Kalman filter in dealing with non-linear and non-Gaussian models and the serious particle degradation in standard particle filter, a zero-velocity correction algorithm of adaptive particle filter is proposed in this paper ...

doaj   +1 more source

Modified Proportionate Affine Projection Algorithm Based Adaptive DSTATCOM Control With Increased Convergence Speed

open access: yesIEEE Access, 2022
The three-phase DSTATCOM is prone to higher dynamics due to grid disturbances. The proportionate affine projection algorithm (PAPA) is an adaptive filter that can be used for DSTATCOM control.
Arobinda Dash   +5 more
doaj   +1 more source

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