Yicun Zhen

activity

20142023

most citedA Review of Innovation-Based Methods to Jointly Estimate Model and Observation Error Covariance Matrices in Ensemble Data Assimilation

143 citations · 209 across the 7 of their papers we have counts for

collaborators

Showing 2022Show all

2 papers · 1 filter

math.OC2022★ 3 cited

Physically Constrained Covariance Inflation from Location Uncertainty

Yicun Zhen, Valentin Resseguier, Bertrand Chapron

Motivated by the concept of ``location uncertainty", initially introduced in \cite{Memin2013FluidFD}, a scheme is sought to perturb the ``location" of a state variable at every for…

math.OC2022

Bridging Koopman Operator and time-series auto-correlation based Hilbert-Schmidt operator

Yicun Zhen, Bertrand Chapron, Etienne Mémin

Given a stationary continuous-time process $f (t)$ , the Hilbert-Schmidt operator $A_{τ}$ can be defined for every finite $τ$ \cite{Vautard1989SingularSA}. Let $λ_{τ, i}$ be the eigenval…