An adaptive time-step energy-preserving variational integrator for flexible multibody system dynamics

S Gu, J Chen, Q Tian - Applied Mathematical Modelling, 2025 - Elsevier
An adaptive time-step variational integrator for simulating flexible multibody system
dynamics is proposed. The integrator can adapt the time-step based on the variation of the …

Lie group forced variational integrator networks for learning and control of robot systems

V Duruisseaux, TP Duong, M Leok… - … for Dynamics and …, 2023 - proceedings.mlr.press
Incorporating prior knowledge of physics laws and structural properties of dynamical
systems into the design of deep learning architectures has proven to be a powerful …

A variational formulation of accelerated optimization on Riemannian manifolds

V Duruisseaux, M Leok - SIAM Journal on Mathematics of Data Science, 2022 - SIAM
It was shown recently by W. Su, S. Boyd, and E. Candes, J. Mach. Learn. Res., 17 (2016),
pp. 1--43 that Nesterov's accelerated gradient method for minimizing a smooth convex …

[图书][B] Symplectic integration of stochastic hamiltonian systems

J Hong, L Sun - 2022 - Springer
As numerous modern challenges in scientific questions, industrial needs, and societal
requirements emerge, the demand for designing numerical methods to solve tremendously …

Accelerated optimization on Riemannian manifolds via discrete constrained variational integrators

V Duruisseaux, M Leok - Journal of Nonlinear Science, 2022 - Springer
A variational formulation for accelerated optimization on normed vector spaces was recently
introduced in Wibisono et al.(PNAS 113: E7351–E7358, 2016), and later generalized to the …

Action functional gradient descent algorithm for estimating escape paths in stochastic chemical reaction networks

P Gagrani, E Smith - Physical Review E, 2023 - APS
We first derive the Hamilton-Jacobi theory underlying continuous-time Markov processes,
and then we use the construction to develop a variational algorithm for estimating escape …

Orbital dynamics of the solar basin

C Giovanetti, R Lasenby, K Van Tilburg - Journal of High Energy Physics, 2024 - Springer
A bstract We study the dynamics of the solar basin—the accumulated population of weakly-
interacting particles on bound orbits in the Solar System. We focus on particles starting off on …

Accelerated optimization on Riemannian manifolds via projected variational integrators

V Duruisseaux, M Leok - arXiv preprint arXiv:2201.02904, 2022 - arxiv.org
A variational formulation of accelerated optimization on normed spaces was recently
introduced by considering a specific family of time-dependent Bregman Lagrangian and …

Discrete variational calculus for accelerated optimization

CM Campos, A Mahillo, DM De Diego - Journal of Machine Learning …, 2023 - jmlr.org
Many of the new developments in machine learning are connected with gradient-based
optimization methods. Recently, these methods have been studied using a variational …

Practical perspectives on symplectic accelerated optimization

V Duruisseaux, M Leok - Optimization Methods and Software, 2023 - Taylor & Francis
Geometric numerical integration has recently been exploited to design symplectic
accelerated optimization algorithms by simulating the Bregman Lagrangian and Hamiltonian …