Search Results for author: Yaofeng Desmond Zhong

Found 10 papers, 6 papers with code

Improving Gradient Computation for Differentiable Physics Simulation with Contacts

1 code implementation28 Apr 2023 Yaofeng Desmond Zhong, Jiequn Han, Biswadip Dey, Georgia Olympia Brikis

We find that existing differentiable simulation methods provide inaccurate gradients when the contact normal direction is not fixed - a general situation when the contacts are between two moving objects.

A Neural ODE Interpretation of Transformer Layers

no code implementations12 Dec 2022 Yaofeng Desmond Zhong, Tongtao Zhang, Amit Chakraborty, Biswadip Dey

Our experiments show that this simple modification improves the performance of transformer networks in multiple tasks.

Image Classification Numerical Integration

Differentiable Physics Simulations with Contacts: Do They Have Correct Gradients w.r.t. Position, Velocity and Control?

1 code implementation8 Jul 2022 Yaofeng Desmond Zhong, Jiequn Han, Georgia Olympia Brikis

In recent years, an increasing amount of work has focused on differentiable physics simulation and has produced a set of open source projects such as Tiny Differentiable Simulator, Nimble Physics, diffTaichi, Brax, Warp, Dojo and DiffCoSim.

Position

A Decentralized Reinforcement Learning Framework for Efficient Passage of Emergency Vehicles

no code implementations30 Oct 2021 Haoran Su, Yaofeng Desmond Zhong, Biswadip Dey, Amit Chakraborty

Consequently, the decentralized RL agents learn network-level cooperative traffic signal phase strategies that reduce EMV travel time and the average travel time of non-EMVs in the network.

reinforcement-learning Reinforcement Learning (RL)

EMVLight: A Decentralized Reinforcement Learning Framework for Efficient Passage of Emergency Vehicles

no code implementations12 Sep 2021 Haoran Su, Yaofeng Desmond Zhong, Biswadip Dey, Amit Chakraborty

EMVLight extends Dijkstra's algorithm to efficiently update the optimal route for the EMVs in real time as it travels through the traffic network.

reinforcement-learning Reinforcement Learning (RL)

Extending Lagrangian and Hamiltonian Neural Networks with Differentiable Contact Models

1 code implementation NeurIPS 2021 Yaofeng Desmond Zhong, Biswadip Dey, Amit Chakraborty

In this paper, we introduce a differentiable contact model, which can capture contact mechanics: frictionless/frictional, as well as elastic/inelastic.

Contact mechanics Friction +1

Benchmarking Energy-Conserving Neural Networks for Learning Dynamics from Data

no code implementations3 Dec 2020 Yaofeng Desmond Zhong, Biswadip Dey, Amit Chakraborty

The last few years have witnessed an increased interest in incorporating physics-informed inductive bias in deep learning frameworks.

Benchmarking Inductive Bias +2

Unsupervised Learning of Lagrangian Dynamics from Images for Prediction and Control

1 code implementation NeurIPS 2020 Yaofeng Desmond Zhong, Naomi Ehrich Leonard

The VAE is designed to account for the geometry of physical systems composed of multiple rigid bodies in the plane.

Dissipative SymODEN: Encoding Hamiltonian Dynamics with Dissipation and Control into Deep Learning

1 code implementation ICLR Workshop DeepDiffEq 2019 Yaofeng Desmond Zhong, Biswadip Dey, Amit Chakraborty

In this work, we introduce Dissipative SymODEN, a deep learning architecture which can infer the dynamics of a physical system with dissipation from observed state trajectories.

Symplectic ODE-Net: Learning Hamiltonian Dynamics with Control

1 code implementation ICLR 2020 Yaofeng Desmond Zhong, Biswadip Dey, Amit Chakraborty

In this paper, we introduce Symplectic ODE-Net (SymODEN), a deep learning framework which can infer the dynamics of a physical system, given by an ordinary differential equation (ODE), from observed state trajectories.

Inductive Bias

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