23 citations · 87 across the 16 of their papers we have counts for
16 papers
The finite expression method for turbulent dynamics with high-order moment recovery
Xingjian Xu, Di Qi, Chunmei Wang
Turbulent dynamical systems are characterized by nonlinear interactions and stochastic effects that generate coupled statistical quantities, such as non-zero higher-order moments,…
The Maintenance of Coherent Vortex Topology by Lagrangian Chaos in Drift-Rossby Wave Turbulence
Norman M. Cao, Di Qi
This work introduces the "potential vorticity bucket brigade," a mechanism for explaining the resilience of vortex structures in magnetically confined fusion plasmas and geophysica…
Nearly integrable flows and chaotic tangles in the Dimits shift regime of plasma edge turbulence
Norman M. Cao, Di Qi
Transitionally turbulent flows frequently exhibit spatiotemporal intermittency, reflecting a complex interplay between driving forces, dissipation, and transport present in these s…
Effective Statistical Control Strategies for Complex Turbulent Dynamical Systems
Jeffrey Covington, Di Qi, Nan Chen
Control of complex turbulent dynamical systems involving strong nonlinearity and high degrees of internal instability is an important topic in practice. Different from traditional…
High-order Moment Closure Models with Random Batch Method for Efficient Computation of Multiscale Turbulent Systems
Di Qi, Jian-Guo Liu
We propose a high-order stochastic-statistical moment closure model for efficient ensemble prediction of leading-order statistical moments and probability density functions in mult…
A Random Batch Method for Efficient Ensemble Forecasts of Multiscale Turbulent Systems
Di Qi, Jian-Guo Liu
A new efficient ensemble prediction strategy is developed for a general turbulent model framework with emphasis on the nonlinear interactions between large and small scale variable…