5 citations · 12 across the 5 of their papers we have counts for
5 papers
Trust-region approximation of extreme trajectories in power system dynamics
Daniel Adrian Maldonado, Emil Constantinescu, Hong Zhang +2
In this work we present a novel technique, based on a trust-region optimization algorithm and second-order trajectory sensitivities, to compute the extreme trajectories of power sy…
Optimal Checkpointing for Adjoint Multistage Time-Stepping Schemes
Hong Zhang, Emil Constantinescu
We consider checkpointing strategies that minimize the number of recomputations needed when performing discrete adjoint computations using multistage time-stepping schemes, which r…
Mass-Conserving Implicit-Explicit Methods for Coupled Compressible Navier-Stokes Equations
Shinhoo Kang, Emil M. Constantinescu, Hong Zhang +1
Earth system models are composed of coupled components that separately model systems such as the global atmosphere, ocean, and land surface. While these components are well develop…
PETSc TSAdjoint: a discrete adjoint ODE solver for first-order and second-order sensitivity analysis
Hong Zhang, Emil M. Constantinescu, Barry F. Smith
We present a new software system PETSc TSAdjoint for first-order and second-order adjoint sensitivity analysis of time-dependent nonlinear differential equations. The derivative ca…
Stability Analysis of Interface Conditions for Ocean-Atmosphere Coupling
Hong Zhang, Zhengyu Liu, Emil Constantinescu +1
In this paper we analyze the stability of different coupling strategies for multidomain PDEs that arise in general circulation models used in climate simulations. We focus on fully…