Results 61 to 70 of about 40,768 (209)
Diagnostic performance of urinary adipsin as a screening biomarker for pre‐eclampsia
International Journal of Gynecology &Obstetrics, EarlyView.Abstract Objective This study evaluated the diagnostic performance of urinary adipsin as a potential biomarker for pre‐eclampsia screening in a low‐resource setting. Methods A case–control study was conducted involving 150 pregnant women classified into three groups: 50 healthy pregnancies, 50 high‐risk pregnancies without pre‐eclampsia, and 50 ...
Bismark Opoku Mensah +4 more
wiley +1 more source
Havacılık ve Uzay Teknolojileri Dergisi, 2022 In this study an integrated adaptive TRIAD/Extended Kalman Filter (EKF) attitude estimation algorithm is presented, in which the TRIAD and an adaptive EKF are combined to estimate the attitude of a nanosatellite.
Hasan Kınataş, Cengiz Hacızade
doaj
Towards a Model Based Sensor Measurement Variance Input for Extended Kalman Filter State Estimation
Drones, 2019 In this paper, we present an alternate method for the generation and implementation of the sensor measurement variance used in an Extended Kalman Filter (EKF).
Harry A. G. Pointon +3 more
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Distributed Error Correction of EKF Algorithm in Multi-Sensor Fusion Localization Model
IEEE Access, 2020 In order to solve the problem that the standard extended Kalman filter (EKF) algorithm has large errors in Unmanned Aerial Vehicle (UAV) multi-sensor fusion localization, this paper proposes a multi-sensor fusion localization method based on adaptive ...
Fengjun Hu, Gang Wu
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Sensorless speed control of DC motor using EKF estimator and TSK fuzzy logic controller
Automatika, 2022 In this article, sensorless speed control of DC motor has been proposed using the extended Kalman filter (EKF) estimator and Takagi–Sugeno-Kang (TSK) fuzzy logic controller (FLC).
Ravi Pratap Tripathi +3 more
doaj +1 more source
Limnology and Oceanography: Methods, EarlyView.Abstract Estimating exchange rates of submarine groundwater discharge (SGD) at high temporal resolution over extended periods remains challenging, particularly when using heat as a tracer in highly dynamic environments such as tidal systems. Currently available heat transport models struggle to accurately quantify SGD exchange rates in these settings ...
S. Frei +3 more
wiley +1 more source
A Robust Pose Estimation Method for Multicopters Using Off-Board Multiple Cameras
IEEE Access, 2020 Pose estimation is an important issue for the visual servoing of multicopters. With a process model customized for multicopters and a generic camera model, an extended Kalman filter (EKF) method is proposed in this paper to estimate the pose of ...
Qiang Fu, Zi-Liang Zheng
doaj +1 more source
IEEE Access, 2023 Accurate battery state-of-charge (SOC) estimation is important for the efficient and reliable operation of battery application systems. The extended Kalman filter (EKF), which is based on the battery model, is widely used as a real-time SOC estimation ...
Jaejung Yun +4 more
doaj +1 more source
Model error and sequential data assimilation. A deterministic formulation
, 2008 Data assimilation schemes are confronted with the presence of model errors arising from the imperfect description of atmospheric dynamics. These errors are usually modeled on the basis of simple assumptions such as bias, white noise, first order Markov ...
Carrassi, A., Nicolis, C., Vannitsem, S.
core +1 more source
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT This paper focuses on state estimation for a fairly general class of systems, involving nonlinear functions and disturbances in both the process dynamics and output equations. A nonlinear observer that satisfies a H∞$$ {\boldsymbol{H}}_{\boldsymbol{\infty}} $$ disturbance attenuation constraint in addition to providing asymptotic stability in ...
Hamidreza Movahedi +2 more
wiley +1 more source