Search Results for author: Amirhossein Taghvaei

Found 20 papers, 5 papers with code

Time-Reversal of Stochastic Maximum Principle

no code implementations4 Mar 2024 Amirhossein Taghvaei

The condition involves a coupled system of forward and backward stochastic differential equations (FBSDE) for the state and the adjoint processes.

Conditional Optimal Transport on Function Spaces

1 code implementation9 Nov 2023 Bamdad Hosseini, Alexander W. Hsu, Amirhossein Taghvaei

We present a systematic study of conditional triangular transport maps in function spaces from the perspective of optimal transportation and with a view towards amortized Bayesian inference.

Bayesian Inference

Nonlinear Filtering with Brenier Optimal Transport Maps

no code implementations21 Oct 2023 Mohammad Al-jarrah, Niyizhen Jin, Bamdad Hosseini, Amirhossein Taghvaei

This paper is concerned with the problem of nonlinear filtering, i. e., computing the conditional distribution of the state of a stochastic dynamical system given a history of noisy partial observations.

Stochastic Optimization

A matching principle for power transfer in Stochastic Thermodynamics

no code implementations17 Mar 2023 Olga Movilla Miangolarra, Amirhossein Taghvaei, Tryphon T. Georgiou

Gradients in temperature and particle concentration fuel many processes in the physical and biological world.

A Survey of Feedback Particle Filter and related Controlled Interacting Particle Systems (CIPS)

no code implementations3 Jan 2023 Amirhossein Taghvaei, Prashant G. Mehta

In this survey, we describe controlled interacting particle systems (CIPS) to approximate the solution of the optimal filtering and the optimal control problems.

Duality-Based Stochastic Policy Optimization for Estimation with Unknown Noise Covariances

no code implementations26 Oct 2022 Shahriar Talebi, Amirhossein Taghvaei, Mehran Mesbahi

Specifically, building on the duality between synthesizing optimal control and estimation gains, the filter design problem is formalized as direct policy learning.

Geometry of finite-time thermodynamic cycles with anisotropic thermal fluctuations

no code implementations23 Mar 2022 Olga Movilla Miangolarra, Amirhossein Taghvaei, Yongxin Chen, Tryphon T. Georgiou

In contrast to the classical concept of a Carnot engine that alternates contact between heat baths of different temperatures, naturally occurring processes usually harvest energy from anisotropy, being exposed simultaneously to chemical and thermal fluctuations of different intensities.

An Optimal Transport Formulation of Bayes' Law for Nonlinear Filtering Algorithms

no code implementations22 Mar 2022 Amirhossein Taghvaei, Bamdad Hosseini

This paper presents a variational representation of the Bayes' law using optimal transportation theory.

Variational Wasserstein gradient flow

1 code implementation4 Dec 2021 Jiaojiao Fan, Qinsheng Zhang, Amirhossein Taghvaei, Yongxin Chen

Wasserstein gradient flow has emerged as a promising approach to solve optimization problems over the space of probability distributions.

Controlled Interacting Particle Algorithms for Simulation-based Reinforcement Learning

no code implementations2 Jul 2021 Anant Joshi, Amirhossein Taghvaei, Prashant G. Mehta, Sean P. Meyn

This paper is concerned with optimal control problems for control systems in continuous time, and interacting particle system methods designed to construct approximate control solutions.

reinforcement-learning Reinforcement Learning (RL)

Scalable Computations of Wasserstein Barycenter via Input Convex Neural Networks

2 code implementations8 Jul 2020 Jiaojiao Fan, Amirhossein Taghvaei, Yongxin Chen

Wasserstein Barycenter is a principled approach to represent the weighted mean of a given set of probability distributions, utilizing the geometry induced by optimal transport.

An Optimal Transport Formulation of the Ensemble Kalman Filter

no code implementations5 Oct 2019 Amirhossein Taghvaei, Prashant G. Mehta

For this algorithm, the equations for empirical mean and covariance are derived and shown to be identical to the Kalman filter.

Optimal transport mapping via input convex neural networks

2 code implementations ICML 2020 Ashok Vardhan Makkuva, Amirhossein Taghvaei, Sewoong Oh, Jason D. Lee

Building upon recent advances in the field of input convex neural networks, we propose a new framework where the gradient of one convex function represents the optimal transport mapping.

2-Wasserstein Approximation via Restricted Convex Potentials with Application to Improved Training for GANs

1 code implementation19 Feb 2019 Amirhossein Taghvaei, Amin Jalali

We provide a framework to approximate the 2-Wasserstein distance and the optimal transport map, amenable to efficient training as well as statistical and geometric analysis.

Accelerated Flow for Probability Distributions

no code implementations10 Jan 2019 Amirhossein Taghvaei, Prashant G. Mehta

al. 2016) from vector valued variables to probability distributions.

Accelerated Gradient Flow for Probability Distributions

no code implementations27 Sep 2018 Amirhossein Taghvaei, Prashant G. Mehta

In particular, we extend the recent variational formulation of accelerated gradient methods in wibisono2016 from vector valued variables to probability distributions.

How regularization affects the critical points in linear networks

no code implementations NeurIPS 2017 Amirhossein Taghvaei, Jin W. Kim, Prashant G. Mehta

The formulation is used to provide a complete characterization of the critical points in terms of the solutions of a nonlinear matrix-valued equation, referred to as the characteristic equation.

Adversarial Delays in Online Strongly-Convex Optimization

no code implementations20 May 2016 Daniel Khashabi, Kent Quanrud, Amirhossein Taghvaei

We consider the problem of strongly-convex online optimization in presence of adversarial delays; in a T-iteration online game, the feedback of the player's query at time t is arbitrarily delayed by an adversary for d_t rounds and delivered before the game ends, at iteration t+d_t-1.

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