Results 1 to 10 of about 167,906 (119)

Bayesian Cramér-Rao Lower Bounds for Prediction and Smoothing of Nonlinear TASD Systems

open access: yesSensors, 2022
The performance evaluation of state estimators for nonlinear regular systems, in which the current measurement only depends on the current state directly, has been widely studied using the Bayesian Cramér-Rao lower bound (BCRLB).
Xianqing Li   +3 more
doaj   +1 more source

OS-PCA: Orthogonal Smoothed Principal Component Analysis Applied to Metabolome Data

open access: yesMetabolites, 2021
Principal component analysis (PCA) has been widely used in metabolomics. However, it is not always possible to detect phenotype-associated principal component (PC) scores.
Hiroyuki Yamamoto   +2 more
doaj   +1 more source

Optical Flow Estimation Based on Curvelet Transform and Spatio-temporal Derivatives [PDF]

open access: yesEngineering and Technology Journal, 2010
Optical flow estimation is still one of the key problems in computer vision.When estimating the displacement field between two images, it is applied as soonas correspondences between pixels are needed.
Atheer A. Sabri
doaj   +1 more source

Time Series Smoothing Improving Forecasting

open access: yesApplied Computer Systems, 2021
Both statistical and neural network methods may fail in forecasting time series even operating on a great amount of data. It is an open question of which amount fits best to make sufficiently accurate forecasts on it. This implies that the length or time
Romanuke Vadim
doaj   +1 more source

Using a Vegetation Index as a Proxy for Reliability in Surface Reflectance Time Series Reconstruction (RTSR)

open access: yesRemote Sensing, 2023
Time series of optical remote sensing data are instrumental for monitoring vegetation dynamics, but are hampered by missing or noisy observations due to varying atmospheric conditions.
Pieter Kempeneers   +2 more
doaj   +1 more source

Reversible Image Processing for Color Images with Flexible Control

open access: yesApplied Sciences, 2023
In this paper, we propose an image processing method for color images to reversibly achieve flexible functions. Most previous research has focused on reversible contrast enhancement (CE) for grayscale images. When we directly apply these methods to color
Yuki Sugimoto, Shoko Imaizumi
doaj   +1 more source

Discrete and Fuzzy Models of Time Series in the Tasks of Forecasting and Diagnostics

open access: yesAxioms, 2020
The development of the economy and the transition to industry 4.0 creates new challenges for artificial intelligence methods. Such challenges include the processing of large volumes of data, the analysis of various dynamic indicators, the discovery of ...
Anton Romanov   +4 more
doaj   +1 more source

Two approaches to solving the problem of smoothing digital signals based on a combined criterion [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2017
The paper presents a method for smoothing signals represented by a single realization of a finite-length random process, under conditions of a limited amount of a priori information about the signal function and statistical characteristics the ...
Semenishchev Evgenii   +2 more
doaj   +1 more source

Analyzing Error Bounds for Seasonal-Trend Decomposition of Antarctica Temperature Time Series Involving Missing Data

open access: yesAtmosphere, 2023
In this paper, we study the problem of extracting trends from time series data involving missing values. In particular, we investigate a general class of procedures that impute the missing data and then extract trends using seasonal-trend decomposition ...
Chun-Fung Kwok   +2 more
doaj   +1 more source

Rauch-Tung-Striebel Smoothing Linear Multi-Target Tracking in Clutter

open access: yesIEEE Access, 2022
Most conventional data association based multi-target tracking (MTT) algorithms typically suffer from intractable computational complexities and could not perform in an environment where large number of closely spaced multiple targets move across each ...
Sufyan Ali Memon   +3 more
doaj   +1 more source

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