Search Results for author: Siqi Zhang

Found 13 papers, 1 papers with code

Communication-Efficient Gradient Descent-Accent Methods for Distributed Variational Inequalities: Unified Analysis and Local Updates

no code implementations8 Jun 2023 Siqi Zhang, Sayantan Choudhury, Sebastian U Stich, Nicolas Loizou

However, with the increase of minimax optimization and variational inequality problems in machine learning, the necessity of designing efficient distributed/federated learning approaches for these problems is becoming more apparent.

Federated Learning

Refined Pseudo labeling for Source-free Domain Adaptive Object Detection

no code implementations7 Mar 2023 Siqi Zhang, Lu Zhang, Zhiyong Liu

Domain adaptive object detection (DAOD) assumes that both labeled source data and unlabeled target data are available for training, but this assumption does not always hold in real-world scenarios.

object-detection Object Detection +1

FIT: Frequency-based Image Translation for Domain Adaptive Object Detection

no code implementations7 Mar 2023 Siqi Zhang, Lu Zhang, Zhiyong Liu, Hangtao Feng

Domain adaptive object detection (DAOD) aims to adapt the detector from a labelled source domain to an unlabelled target domain.

object-detection Object Detection +1

Robot Subset Selection for Swarm Lifetime Maximization in Computation Offloading with Correlated Data Sources

no code implementations25 Jan 2023 Siqi Zhang, Na Yi, Yi Ma

When the number of subgraphs is maximized, the proposed subset selection approach is shown to be optimum in the AWGN channel.

Generalization Bounds of Nonconvex-(Strongly)-Concave Stochastic Minimax Optimization

no code implementations28 May 2022 Siqi Zhang, Yifan Hu, Liang Zhang, Niao He

We further study the algorithm-dependent generalization bounds via stability arguments of algorithms.

Generalization Bounds

Unseen Object Instance Segmentation with Fully Test-time RGB-D Embeddings Adaptation

no code implementations21 Apr 2022 Lu Zhang, Siqi Zhang, Xu Yang, Hong Qiao, Zhiyong Liu

In this paper, we emphasize the adaptation process across sim2real domains and model it as a learning problem on the BatchNorm parameters of a simulation-trained model.

Knowledge Distillation Segmentation +4

A Dynamic 3D Spontaneous Micro-expression Database: Establishment and Evaluation

no code implementations31 Jul 2021 Fengping Wang, Jie Li, Siqi Zhang, Chun Qi, Yun Zhang, Danmin Miao

Micro-expressions are spontaneous, unconscious facial movements that show people's true inner emotions and have great potential in related fields of psychological testing.

The Complexity of Nonconvex-Strongly-Concave Minimax Optimization

no code implementations29 Mar 2021 Siqi Zhang, Junchi Yang, Cristóbal Guzmán, Negar Kiyavash, Niao He

In the averaged smooth finite-sum setting, our proposed algorithm improves over previous algorithms by providing a nearly-tight dependence on the condition number.

A Catalyst Framework for Minimax Optimization

no code implementations NeurIPS 2020 Junchi Yang, Siqi Zhang, Negar Kiyavash, Niao He

We introduce a generic \emph{two-loop} scheme for smooth minimax optimization with strongly-convex-concave objectives.

First-Order Optimization Inspired from Finite-Time Convergent Flows

no code implementations6 Oct 2020 Siqi Zhang, Mouhacine Benosman, Orlando Romero, Anoop Cherian

In this paper, we investigate the performance of two first-order optimization algorithms, obtained from forward Euler discretization of finite-time optimization flows.

Biased Stochastic Gradient Descent for Conditional Stochastic Optimization

no code implementations25 Feb 2020 Yifan Hu, Siqi Zhang, Xin Chen, Niao He

Conditional Stochastic Optimization (CSO) covers a variety of applications ranging from meta-learning and causal inference to invariant learning.

Causal Inference Meta-Learning +2

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