Results 11 to 20 of about 689,003 (332)

Inferring the instability of a dynamical system from the skill of data assimilation exercises [PDF]

open access: yesNonlinear Processes in Geophysics, 2021
Data assimilation (DA) aims at optimally merging observational data and model outputs to create a coherent statistical and dynamical picture of the system under investigation.
Y. Chen   +6 more
doaj   +1 more source

Occupational epidemiologist's quest to tame measurement error in exposure

open access: yesGlobal Epidemiology, 2020
I aimed to assess current practices and opportunities for addressing the problem of errors in exposure in occupational epidemiology. Occupational epidemiologists appreciate that errors in exposure are a concern, but almost none correct for these errors ...
Igor Burstyn
doaj   +1 more source

UAV Motion Strategies in Uncertain Dynamic Environments: A Path Planning Method Based on Q-Learning Strategy

open access: yesApplied Sciences, 2018
A solution framework for UAV motion strategies in uncertain dynamic environments is constructed in this paper. Considering that the motion states of UAV might be influenced by some dynamic uncertainties, such as control strategies, flight environments ...
Jun-hui Cui   +3 more
doaj   +1 more source

Theoretical investigation on the mass loss impact on asteroseismic grid-based estimates of mass, radius, and age for RGB stars [PDF]

open access: yes, 2017
We aim to perform a theoretical evaluation of the impact of the mass loss indetermination on asteroseismic grid based estimates of masses, radii, and ages of stars in the red giant branch phase (RGB).
Degl'Innocenti, S.   +3 more
core   +2 more sources

Ecohydrologic Error Models for Improved Bayesian Inference in Remotely Sensed Catchments

open access: yesWater Resources Research, 2019
Leaf area index (LAI) is an important vegetation indicator widely used for simulating vegetation dynamics and quantifying biomass production. Spatial and temporal variability of LAI are often characterized using satellite remote sensing products. However,
Yating Tang   +4 more
doaj   +1 more source

Application of ensemble H-infinity filter in aquifer characterization and comparison to ensemble Kalman filter

open access: yesWater Science and Engineering, 2017
Though the ensemble Kalman filter (EnKF) has been successfully applied in many areas, it requires explicit and accurate model and measurement error information, leading to difficulties in practice when only limited information on error mechanisms of ...
Tong-chao Nan, Ji-chun Wu
doaj   +1 more source

A Flow‐Dependent Targeted Observation Method for Ensemble Kalman Filter Assimilation Systems

open access: yesEarth and Space Science, 2020
In this study, we developed a flow‐dependent sequential assimilation‐based targeted observation method by minimizing the analysis error variance under the framework of the ensemble Kalman filter (EnKF).
Yanling Wu, Zheqi Shen, Youmin Tang
doaj   +1 more source

Observational study on medication administration errors at a University Hospital in Brazil: incidence, nature and associated factors

open access: yesJournal of Pharmaceutical Policy and Practice, 2022
Background Medication administration errors are frequent and cause significant harm globally. However, only a few data are available on their prevalence, nature, and severity in developing countries, particularly in Brazil.
Lindemberg Assunção-Costa   +7 more
doaj   +1 more source

Full-field and anomaly initialization using a low-order climate model: a comparison and proposals for advanced formulations [PDF]

open access: yes, 2014
Initialization techniques for seasonal-to-decadal climate predictions fall into two main categories; namely full-field initialization (FFI) and anomaly initialization (AI).
Asif, M.   +5 more
core   +2 more sources

Investigation of observational error sources in multi-Doppler-radar three-dimensional variational vertical air motion retrievals [PDF]

open access: yesAtmospheric Measurement Techniques, 2019
Multi-Doppler-radar network observations have been used in different configurations over the last several decades to conduct three-dimensional wind retrievals in mesoscale convective systems.
M. Oue   +6 more
doaj   +1 more source

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