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G-Filtering Nonstationary Time Series [PDF]

open access: yesJournal of Probability and Statistics, 2012
The classical linear filter can successfully filter the components from a time series for which the frequency content does not change with time, and those nonstationary time series with time-varying frequency (TVF) components that do not overlap. However,
Mengyuan Xu   +3 more
doaj   +3 more sources

Operational Adaptation of Digital Filter Parameters when Changing the Discrete Time Step in the Problems of Forming the Control of Unmanned Vehicles Using Satellite Measurements [PDF]

open access: yesE3S Web of Conferences, 2023
For the tasks of controlling unmanned vehicles using external information signals, in some cases, a change in the time parameters T0 of periodic data receipt is typical.
Belonogov Viktor
doaj   +1 more source

The Pseudo-Laplace Filter for Vector-Based Elastic Reverse Time Migration

open access: yesFrontiers in Earth Science, 2021
The scalar images (PP and PS) can be effectively obtained in vector-based elastic reverse time migration by applying dot product–based scalar imaging conditions to the separated vector wavefields.
Qizhen Du   +8 more
doaj   +1 more source

An optimum design for air filter housing-louver: Enhancing filter life-time

open access: yesCase Studies in Thermal Engineering, 2020
The design of filter housing and louver have been focused on the filter protection from rain. Up till now the effect of air-flow behavior on the filter life-span has not been considered.
Parkpoom Sriromreun, Paranee Sriromreun
doaj   +1 more source

Predicting Time SeriesUsing an Automatic New Algorithm of the Kalman Filter

open access: yesMathematics, 2022
Time series forecasting is one of the main venues followed by researchers in all areas. For this reason, we develop a new Kalman filter approach, which we call the alternative Kalman filter. The search conditions associated with the standard deviation of
Juan D. Borrero, Jesus Mariscal
doaj   +1 more source

A Combined Filter for Synchronous Detection in Underwater Acoustic Mobile Communication System

open access: yesXibei Gongye Daxue Xuebao, 2020
A scale-stretching combined filter is proposed for underwater acoustic mobile communication receivers. The combined filter consists of the sum of signals with different time stretching and shifting.

doaj   +1 more source

Comparison of the Extended Kalman Filter and the Unscented Kalman Filter for Magnetocardiography activation time imaging [PDF]

open access: yesAdvances in Radio Science, 2013
The non-invasive and radiation-free imaging of the electrical activity of the heart with Electrocardiography (ECG) or Magnetocardiography (MCG) can be helpful for physicians for instance in the localization of the origin of cardiac arrhythmia.
H. Ahrens, F. Argin, L. Klinkenbusch
doaj   +1 more source

Finite-time dissipative filter design for discrete-time stochastic interval systems with time-varying delays

open access: yesMeasurement + Control, 2022
The finite-time dissipative filtering problem for a kind of discrete-time stochastic interval system with time-varying delays whose parameters are taken in a convex hull is investigated in this paper.
Guici Chen, Xin Zhou, Qing Zhang
doaj   +1 more source

A Sector-Matching Probability Hypothesis Density Filter for Radar Multiple Target Tracking

open access: yesApplied Sciences, 2023
The development of high-tech, dim, small targets, such as drones and cruise missiles, brings great challenges to radar multi-target tracking (MTT), making it necessary to extend the beam dwell time to obtain a high signal-to-noise ratio (SNR).
Jialin Yang   +6 more
doaj   +1 more source

Transient response of near-wellbore supercharging during filter cake growth

open access: yesOil & Gas Science and Technology, 2021
Supercharging in the vicinity of a borehole is an important factor that affects formation damage and drilling safety, and the filter cake growth process has a significant impact on supercharging in the vicinity of the borehole.
Ma Tianshou   +3 more
doaj   +1 more source

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