Search Results for author: Alireza Aghasi

Found 23 papers, 3 papers with code

Laplace-HDC: Understanding the geometry of binary hyperdimensional computing

no code implementations16 Apr 2024 Saeid Pourmand, Wyatt D. Whiting, Alireza Aghasi, Nicholas F. Marshall

This paper studies the geometry of binary hyperdimensional computing (HDC), a computational scheme in which data are encoded using high-dimensional binary vectors.

Translation

Fully Zeroth-Order Bilevel Programming via Gaussian Smoothing

no code implementations29 Mar 2024 Alireza Aghasi, Saeed Ghadimi

In this paper, we study and analyze zeroth-order stochastic approximation algorithms for solving bilvel problems, when neither the upper/lower objective values, nor their unbiased gradient estimates are available.

Bilevel Optimization

Survey of Distributed Algorithms for Resource Allocation over Multi-Agent Systems

no code implementations28 Jan 2024 Mohammadreza Doostmohammadian, Alireza Aghasi, Mohammad Pirani, Ehsan Nekouei, Houman Zarrabi, Reza Keypour, Apostolos I. Rikos, Karl H. Johansson

This survey paper provides a comprehensive analysis of distributed algorithms for addressing the distributed resource allocation (DRA) problem over multi-agent systems.

Distributed Optimization Scheduling

Accelerated Distributed Allocation

no code implementations28 Jan 2024 Mohammadreza Doostmohammadian, Alireza Aghasi

The proposed algorithm is all-time feasible, implying that at any termination time of the algorithm, the resource-demand feasibility holds.

Management Scheduling

Robust-to-Noise Algorithms for Distributed Resource Allocation and Scheduling

no code implementations30 Nov 2023 Mohammadreza Doostmohammadian, Alireza Aghasi

Efficient resource allocation and scheduling algorithms are essential for various distributed applications, ranging from wireless networks and cloud computing platforms to autonomous multi-agent systems and swarm robotic networks.

Cloud Computing Scheduling

Discretized Distributed Optimization over Dynamic Digraphs

no code implementations14 Nov 2023 Mohammadreza Doostmohammadian, Wei Jiang, Muwahida Liaquat, Alireza Aghasi, Houman Zarrabi

This work, particularly, is an improvement over existing stochastic-weight undirected networks in case of link removal or packet drops.

Distributed Optimization

D-SVM over Networked Systems with Non-Ideal Linking Conditions

no code implementations13 Apr 2023 Mohammadreza Doostmohammadian, Alireza Aghasi, Houman Zarrabi

The agents solve a consensus-constraint distributed optimization cooperatively via continuous-time dynamics, while the links are subject to strongly sign-preserving odd nonlinear conditions.

Binary Classification Distributed Optimization +1

Distributed Constraint-Coupled Optimization over Lossy Networks

no code implementations30 Aug 2022 Mohammadreza Doostmohammadian, Usman A. Khan, Alireza Aghasi, Themistoklis Charalambous

This paper considers distributed resource allocation and sum-preserving constrained optimization over lossy networks, where the links are unreliable and subject to packet drops.

Quantization

RIGID: Robust Linear Regression with Missing Data

no code implementations26 May 2022 Alireza Aghasi, MohammadJavad Feizollahi, Saeed Ghadimi

With the significant increase in using robust optimization techniques to train machine learning models, this paper presents a novel robust regression framework that operates by minimizing the uncertainty associated with missing data.

regression

Distributed Finite-Sum Constrained Optimization subject to Nonlinearity on the Node Dynamics

no code implementations28 Mar 2022 Mohammadreza Doostmohammadian, Maria Vrakopoulou, Alireza Aghasi, Themistoklis Charalambous

Motivated by recent development in networking and parallel data-processing, we consider a distributed and localized finite-sum (or fixed-sum) allocation technique to solve resource-constrained convex optimization problems over multi-agent networks (MANs).

Decision Making

1st-Order Dynamics on Nonlinear Agents for Resource Allocation over Uniformly-Connected Networks

no code implementations10 Sep 2021 Mohammadreza Doostmohammadian, Alireza Aghasi, Maria Vrakopoulou, Themistoklis Charalambous

A general nonlinear $1$st-order consensus-based solution for distributed constrained convex optimization is proposed with network resource allocation applications.

Quantization

Distributed support-vector-machine over dynamic balanced directed networks

no code implementations1 Apr 2021 Mohammadreza Doostmohammadian, Alireza Aghasi, Themistoklis Charalambous, Usman A. Khan

In this paper, we consider the binary classification problem via distributed Support-Vector-Machines (SVM), where the idea is to train a network of agents, with limited share of data, to cooperatively learn the SVM classifier for the global database.

Binary Classification

Constrained Reinforcement Learning With Learned Constraints

no code implementations1 Jan 2021 Shehryar Malik, Usman Anwar, Alireza Aghasi, Ali Ahmed

In this work, given a reward function and a set of demonstrations from an expert that maximizes this reward function while respecting \textit{unknown} constraints, we propose a framework to learn the most likely constraints that the expert respects.

reinforcement-learning Reinforcement Learning (RL)

Inverse Constrained Reinforcement Learning

1 code implementation19 Nov 2020 Usman Anwar, Shehryar Malik, Alireza Aghasi, Ali Ahmed

However, for the real world deployment of reinforcement learning (RL), it is critical that RL agents are aware of these constraints, so that they can act safely.

reinforcement-learning Reinforcement Learning (RL)

Learning To Solve Differential Equations Across Initial Conditions

no code implementations ICLR Workshop DeepDiffEq 2019 Shehryar Malik, Usman Anwar, Ali Ahmed, Alireza Aghasi

Recently, there has been a lot of interest in using neural networks for solving partial differential equations.

Fast Convex Pruning of Deep Neural Networks

1 code implementation17 Jun 2018 Alireza Aghasi, Afshin Abdi, Justin Romberg

We develop a fast, tractable technique called Net-Trim for simplifying a trained neural network.

Network Pruning

Net-Trim: Convex Pruning of Deep Neural Networks with Performance Guarantee

1 code implementation NeurIPS 2017 Alireza Aghasi, Afshin Abdi, Nam Nguyen, Justin Romberg

This program seeks a sparse set of weights at each layer that keeps the layer inputs and outputs consistent with the originally trained model.

Sweep Distortion Removal from THz Images via Blind Demodulation

no code implementations29 Mar 2016 Alireza Aghasi, Barmak Heshmat, Albert Redo-Sanchez, Justin Romberg, Ramesh Raskar

Heavy sweep distortion induced by alignments and inter-reflections of layers of a sample is a major burden in recovering 2D and 3D information in time resolved spectral imaging.

Denoising

Learning Shapes by Convex Composition

no code implementations23 Feb 2016 Alireza Aghasi, Justin Romberg

We present a mathematical and algorithmic scheme for learning the principal geometric elements in an image or 3D object.

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