Search Results for author: Zhan Gao

Found 26 papers, 4 papers with code

Co-Optimization of Environment and Policies for Decentralized Multi-Agent Navigation

no code implementations21 Mar 2024 Zhan Gao, Guang Yang, Amanda Prorok

By introducing two sub-objectives of multi-agent navigation and environment optimization, we propose an $\textit{agent-environment co-optimization}$ problem and develop a $\textit{coordinated algorithm}$ that alternates between these sub-objectives to search for an optimal synthesis of agent actions and obstacle configurations in the environment; ultimately, improving the navigation performance.

On the Trade-Off between Stability and Representational Capacity in Graph Neural Networks

no code implementations4 Dec 2023 Zhan Gao, Amanda Prorok, Elvin Isufi

Analyzing the stability of graph neural networks (GNNs) under topological perturbations is key to understanding their transferability and the role of each architecture component.

An Improved Neural Network Model Based On CNN Using For Fruit Sugar Degree Detection

no code implementations18 Nov 2023 Boyang Deng, Xin Wen, Zhan Gao

In this paper, we proposed a new evaluation standard derived from dataset standard deviation(STD) for evaluating detection performance, validating the viability of using an artificial neural network model to do fruit sugar degree nondestructive detection.

Image Classification

Limited-Memory Greedy Quasi-Newton Method with Non-asymptotic Superlinear Convergence Rate

no code implementations27 Jun 2023 Zhan Gao, Aryan Mokhtari, Alec Koppel

Interestingly, our established non-asymptotic superlinear convergence rate demonstrates an explicit trade-off between the convergence speed and memory requirement, which to our knowledge, is the first of its kind.

Differentially Private Decentralized Deep Learning with Consensus Algorithms

1 code implementation24 Jun 2023 Jasmine Bayrooti, Zhan Gao, Amanda Prorok

Furthermore, we show that it is possible to learn a model achieving high accuracies, within 3% of DP-SGD on MNIST under (1, 10^-5)-differential privacy and within 6% of DP-SGD on CIFAR-100 under (10, 10^-5)-differential privacy, without ever sharing raw data with other agents.

Constrained Environment Optimization for Prioritized Multi-Agent Navigation

no code implementations18 May 2023 Zhan Gao, Amanda Prorok

The goal of this paper is to consider the environment as a decision variable in a system-level optimization problem, where both agent performance and environment cost are incorporated.

Stochastic Optimization

Online Control Barrier Functions for Decentralized Multi-Agent Navigation

no code implementations8 Mar 2023 Zhan Gao, Guang Yang, Amanda Prorok

Control barrier functions (CBFs) enable guaranteed safe multi-agent navigation in the continuous domain.

Robot Navigation

Identification and Estimation of Categorical Random Coefficient Models

1 code implementation28 Feb 2023 Zhan Gao, M. Hashem Pesaran

The utility of the proposed estimator is illustrated by estimating the distribution of returns to education in the U. S. by gender and educational levels.

AirGNNs: Graph Neural Networks over the Air

no code implementations16 Feb 2023 Zhan Gao, Deniz Gunduz

This paper proposes graph neural networks over the air (AirGNNs), a novel GNN architecture that incorporates the communication model into the architecture.

Learning Stable Graph Neural Networks via Spectral Regularization

no code implementations13 Nov 2022 Zhan Gao, Elvin Isufi

Stability of graph neural networks (GNNs) characterizes how GNNs react to graph perturbations and provides guarantees for architecture performance in noisy scenarios.

Movie Recommendation

Decentralized Channel Management in WLANs with Graph Neural Networks

no code implementations30 Oct 2022 Zhan Gao, Yulin Shao, Deniz Gunduz, Amanda Prorok

Wireless local area networks (WLANs) manage multiple access points (APs) and assign scarce radio frequency resources to APs for satisfying traffic demands of associated user devices.

Management

Environment Optimization for Multi-Agent Navigation

no code implementations22 Sep 2022 Zhan Gao, Amanda Prorok

Traditional approaches to the design of multi-agent navigation algorithms consider the environment as a fixed constraint, despite the obvious influence of spatial constraints on agents' performance.

Few-shot Fine-grained Image Classification via Multi-Frequency Neighborhood and Double-cross Modulation

1 code implementation18 Jul 2022 Hegui Zhu, Zhan Gao, Jiayi Wang, Yange Zhou, Chengqing Li

The comprehensive experiments on three fine-grained benchmark datasets for two few-shot tasks verify that FicNet has excellent performance compared to the state-of-the-art methods.

Classification Fine-Grained Image Classification

Learning Stochastic Graph Neural Networks with Constrained Variance

no code implementations29 Jan 2022 Zhan Gao, Elvin Isufi

To overcome this issue, we propose a variance-constrained optimization problem for SGNNs, balancing the expected performance and the stochastic deviation.

Wide and Deep Graph Neural Network with Distributed Online Learning

no code implementations19 Jul 2021 Zhan Gao, Fernando Gama, Alejandro Ribeiro

At training time, the joint wide and deep architecture learns nonlinear representations from data.

Movie Recommendation

Stability of Graph Convolutional Neural Networks to Stochastic Perturbations

no code implementations19 Jun 2021 Zhan Gao, Elvin Isufi, Alejandro Ribeiro

In particular, it proves the expected output difference between the GCNN over random perturbed graphs and the GCNN over the nominal graph is upper bounded by a factor that is linear in the link loss probability.

Training Robust Graph Neural Networks with Topology Adaptive Edge Dropping

no code implementations5 Jun 2021 Zhan Gao, Subhrajit Bhattacharya, Leiming Zhang, Rick S. Blum, Alejandro Ribeiro, Brian M. Sadler

Graph neural networks (GNNs) are processing architectures that exploit graph structural information to model representations from network data.

Data Augmentation

Spherical Convolutional Neural Networks: Stability to Perturbations in SO(3)

no code implementations12 Oct 2020 Zhan Gao, Fernando Gama, Alejandro Ribeiro

Spherical convolutional neural networks (Spherical CNNs) learn nonlinear representations from 3D data by exploiting the data structure and have shown promising performance in shape analysis, object classification, and planning among others.

Object Recognition

Resource Allocation via Model-Free Deep Learning in Free Space Optical Communications

no code implementations27 Jul 2020 Zhan Gao, Mark Eisen, Alejandro Ribeiro

This paper investigates the general problem of resource allocation for mitigating channel fading effects in Free Space Optical (FSO) communications.

Computational Efficiency Stochastic Optimization

Balancing Rates and Variance via Adaptive Batch-Size for Stochastic Optimization Problems

no code implementations2 Jul 2020 Zhan Gao, Alec Koppel, Alejandro Ribeiro

Stochastic gradient descent is a canonical tool for addressing stochastic optimization problems, and forms the bedrock of modern machine learning and statistics.

Stochastic Optimization

Resource Allocation via Graph Neural Networks in Free Space Optical Fronthaul Networks

no code implementations26 Jun 2020 Zhan Gao, Mark Eisen, Alejandro Ribeiro

This paper investigates the optimal resource allocation in free space optical (FSO) fronthaul networks.

Wide and Deep Graph Neural Networks with Distributed Online Learning

no code implementations11 Jun 2020 Zhan Gao, Fernando Gama, Alejandro Ribeiro

At testing time, the deep part (nonlinear) is left unchanged, while the wide part is retrained online, leading to a convex problem.

Stochastic Graph Neural Networks

no code implementations4 Jun 2020 Zhan Gao, Elvin Isufi, Alejandro Ribeiro

Graph neural networks (GNNs) model nonlinear representations in graph data with applications in distributed agent coordination, control, and planning among others.

Optimal WDM Power Allocation via Deep Learning for Radio on Free Space Optics Systems

no code implementations21 Jun 2019 Zhan Gao, Mark Eisen, Alejandro Ribeiro

Radio on Free Space Optics (RoFSO), as a universal platform for heterogeneous wireless services, is able to transmit multiple radio frequency signals at high rates in free space optical networks.

On LASSO for Predictive Regression

no code implementations7 Oct 2018 Ji Hyung Lee, Zhentao Shi, Zhan Gao

This new finding motivates a novel post-selection adaptive LASSO, which we call the twin adaptive LASSO (TAlasso), to restore variable selection consistency.

regression Variable Selection

Implementing Convex Optimization in R: Two Econometric Examples

3 code implementations27 Jun 2018 Zhan Gao, Zhentao Shi

Economists specify high-dimensional models to address heterogeneity in empirical studies with complex big data.

Computation Econometrics

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