Results 41 to 50 of about 21,404,104 (365)

Data assimilation in price formation [PDF]

open access: yesInverse Problems, 2020
Abstract We consider the problem of estimating the density of buyers and vendors in a nonlinear parabolic price formation model using measurements of the price and the transaction rate. Our approach is based on a work by Puel (Puel J-P 2002 C. R. Acad.
Martin Burger   +2 more
openaire   +4 more sources

Improved Calculation of Nonlinear Near-Bed Wave Orbital Velocity in Shallow Water: Validation against Laboratory and Field Data

open access: yesJournal of Marine Science and Engineering, 2020
A new parameterization for calculating the nonlinear near-bed wave orbital velocity in the shallow water was presented. The equations proposed by Isobe and Horikawa (1982) were modified in order to achieve more accurate predictions of the peak orbital ...
Pham Thanh Nam   +3 more
doaj   +1 more source

Sampling error of observation impact statistics [PDF]

open access: yesTellus: Series A, Dynamic Meteorology and Oceanography, 2014
An observation impact is an estimate of the forecast error reduction by assimilating observations with numerical model forecasts. This study compares the sampling errors of the observation impact statistics (OBIS) of July 2011 and January 2012 using two ...
Sung-Min Kim, Hyun Mee Kim
doaj   +1 more source

Continuous Data Assimilation with Stochastically Noisy Data [PDF]

open access: yes, 2014
We analyze the performance of a data-assimilation algorithm based on a linear feedback control when used with observational data that contains measurement errors.
Bessaih, Hakima   +2 more
core   +3 more sources

Sequential Data Assimilation of the Stochastic SEIR Epidemic Model for Regional COVID-19 Dynamics

open access: yesBulletin of Mathematical Biology, 2020
Newly emerging pandemics like COVID-19 call for predictive models to implement precisely tuned responses to limit their deep impact on society. Standard epidemic models provide a theoretically well-founded dynamical description of disease incidence.
Ralf Engbert   +3 more
semanticscholar   +1 more source

Characteristic Scales of Tropical Convection Based on the Japanese Advanced Himawari-8 Imager Observations

open access: yesRemote Sensing, 2022
Convective activities play an important role in tropical weather systems. To investigate the characteristic scales of convection, a method combining a principal component (PC) analysis with Fourier decomposition is applied to brightness temperature ...
Jingchen Pu, Xiaolei Zou
doaj   +1 more source

The ERA‐Interim reanalysis: configuration and performance of the data assimilation system

open access: yes, 2011
ERA‐Interim is the latest global atmospheric reanalysis produced by the European Centre for Medium‐Range Weather Forecasts (ECMWF). The ERA‐Interim project was conducted in part to prepare for a new atmospheric reanalysis to replace ERA‐40, which will ...
D. Dee   +35 more
semanticscholar   +1 more source

Data Assimilation in Reduced Modeling [PDF]

open access: yesSIAM/ASA Journal on Uncertainty Quantification, 2017
We consider the problem of optimal recovery of an element $u$ of a Hilbert space $\mathcal{H}$ from $m$ measurements obtained through known linear functionals on $\mathcal{H}$. Problems of this type are well studied \cite{MRW} under an assumption that $u$ belongs to a prescribed model class, e.g. a known compact subset of $\mathcal{H}$.
Binev, Peter   +5 more
openaire   +5 more sources

Toward Snow Cover Estimation in Mountainous Areas Using Modern Data Assimilation Methods: A Review

open access: yesFrontiers in Earth Science, 2020
The snow cover is a key component of land surface hydrology, especially in mountain areas where it governs the amount and timing of water availability in downstream areas.
C. Largeron   +9 more
semanticscholar   +1 more source

Mitigation of Systematic Noise in F16 SSMIS LAS Channels Observations for Tropical Cyclone Applications

open access: yesRemote Sensing, 2022
The Special Sensor Microwave Imager Sounder (SSMIS) onboard the Defense Meteorological Satellite Program (DMSP) F16, launched on 18 October 2003, was the first conical-scanning radiometer to combine the Special Sensor Microwave/Imagers (SSM/I), Special ...
Huijie Dong, Xiaolei Zou
doaj   +1 more source

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