no code implementations • 10 Dec 2024 • Ziqi Yang, Lihua Xie
This letter presents a nonlinear disturbance observer-parameterized control barrier function (DOp-CBF) designed for a robust safety control system under external disturbances.
1 code implementation • 9 Dec 2024 • Kuan Xu, Zeyu Jiang, Haozhi Cao, Shenghai Yuan, Chen Wang, Lihua Xie
Scene Coordinate Regression (SCR) is a visual localization technique that utilizes deep neural networks (DNN) to directly regress 2D-3D correspondences for camera pose estimation.
no code implementations • 2 Oct 2024 • Xingyu Ji, Shenghai Yuan, Jianping Li, Pengyu Yin, Haozhi Cao, Lihua Xie
Lastly, we introduce a probabilistic feature association scheme that considers the entire probability density of assignments, which can manage uncertainties in measurement and initial pose estimation.
1 code implementation • 29 Sep 2024 • Yucheng Wang, Peiliang Gong, Min Wu, Felix Ott, XiaoLi Li, Lihua Xie, Zhenghua Chen
While SFUDA is well-developed in visual tasks, its application to Time-Series SFUDA (TS-SFUDA) remains limited due to the challenge of transferring crucial temporal dependencies across domains.
1 code implementation • 29 Sep 2024 • Yucheng Wang, Min Wu, XiaoLi Li, Lihua Xie, Zhenghua Chen
Remaining Useful Life (RUL) prediction is a critical aspect of Prognostics and Health Management (PHM), aimed at predicting the future state of a system to enable timely maintenance and prevent unexpected failures.
1 code implementation • 17 Sep 2024 • Thien-Minh Nguyen, Yizhuo Yang, Tien-Dat Nguyen, Shenghai Yuan, Lihua Xie
While UWB-based methods can achieve high localization accuracy in small-scale areas, their accuracy and reliability are significantly challenged in large-scale environments.
no code implementations • 1 Aug 2024 • Kun Li, Kai Zhao, Yongduan Song, Lihua Xie
For most existing prescribed performance formation control methods, performance requirements are not directly imposed on the relative states between agents but on the consensus error, which lacks a clear physical interpretation of their solution.
no code implementations • 8 Jul 2024 • Junfei Wang, He Huang, Jingze Feng, Steven Wong, Lihua Xie, Jianfei Yang
There is a significant demand for indoor localization technology in smart buildings, and the most promising solution in this field is using RF sensors and fingerprinting-based methods that employ machine learning models trained on crowd-sourced user data gathered from IoT devices.
no code implementations • 6 Apr 2024 • Siyu Chen, Kangcheng Liu, Chen Wang, Shenghai Yuan, Jianfei Yang, Lihua Xie
Visual Odometry (VO) is vital for the navigation of autonomous systems, providing accurate position and orientation estimates at reasonable costs.
no code implementations • 24 Mar 2024 • Junqiao Fan, Jianfei Yang, Yuecong Xu, Lihua Xie
However, the mmWave radar has a limited resolution with severe noise, leading to inaccurate and inconsistent human pose estimation.
no code implementations • CVPR 2024 • Thien-Minh Nguyen, Shenghai Yuan, Thien Hoang Nguyen, Pengyu Yin, Haozhi Cao, Lihua Xie, Maciej Wozniak, Patric Jensfelt, Marko Thiel, Justin Ziegenbein, Noel Blunder
Perception plays a crucial role in various robot applications.
1 code implementation • 11 Mar 2024 • Haozhi Cao, Yuecong Xu, Jianfei Yang, Pengyu Yin, Xingyu Ji, Shenghai Yuan, Lihua Xie
Motivated by the fact that reliable predictions should be consistent with their spatial-temporal correspondences, Latte aggregates consecutive frames in a slide window manner and constructs Spatial-Temopral (ST) voxels to capture temporally local prediction consistency for each modality.
no code implementations • 10 Mar 2024 • Jianping Li, Thien-Minh Nguyen, Shenghai Yuan, Lihua Xie
The proposed method consists of a spatial smoothing module and a pose adjustment module, which combines the benefits of local consistency and global accuracy.
no code implementations • 6 Mar 2024 • Yucheng Wang, Ruibing Jin, Min Wu, XiaoLi Li, Lihua Xie, Zhenghua Chen
To capture these dependencies, Graph Neural Networks (GNNs) have emerged as powerful tools, yet their effectiveness is restricted by the quality of graph construction from MTS data.
no code implementations • 29 Feb 2024 • Zhiyuan Yang, Yunjiao Zhou, Lihua Xie, Jianfei Yang
We find that the tiny model after network augmentation is much easier for a teacher to distill.
no code implementations • 29 Feb 2024 • Jianfei Yang, Shijie Tang, Yuecong Xu, Yunjiao Zhou, Lihua Xie
Benefiting from our unsupervised learning procedure, the network requires only a small amount of annotated data for finetuning and can adapt to the new environment with better performance.
1 code implementation • 6 Feb 2024 • Shenghai Yuan, Yizhuo Yang, Thien Hoang Nguyen, Thien-Minh Nguyen, Jianfei Yang, Fen Liu, Jianping Li, Han Wang, Lihua Xie
In response to the evolving challenges posed by small unmanned aerial vehicles (UAVs), which possess the potential to transport harmful payloads or independently cause damage, we introduce MMAUD: a comprehensive Multi-Modal Anti-UAV Dataset.
no code implementations • 28 Jan 2024 • Nachuan Ma, Rui Fan, Lihua Xie
Subsequently, a generative adversarial network is trained to restore the corrupted regions by leveraging the semantic context learned from surrounding uncorrupted regions.
no code implementations • 19 Dec 2023 • Xu Fang, Lihua Xie
Compared with existing relative-measurement-based formation maneuver control, the advantages of the proposed method are that it is output (relative output) feedback based and shows how to realize different types of formation shape.
no code implementations • 19 Dec 2023 • Xu Fang, Xiaolei Li, Lihua Xie
This paper investigates the localization problem of a network in 2-D and 3-D spaces given the positions of anchor nodes in a global frame and inter-node relative measurements in local coordinate frames.
no code implementations • 18 Dec 2023 • Xu Fang, Xiaolei Li, Lihua Xie
Each node holds a local coordinate frame without a common orientation and can only measure one type of information (relative position, distance, relative bearing, angle, or ratio-of-distance measurements) about its neighboring nodes in its local coordinate frame.
no code implementations • 18 Dec 2023 • Xu Fang, Lihua Xie, Xiaolei Li
Different from most existing distributed localization approaches in static networks where the agents in a network are static, this paper addresses the distributed localization problem in dynamic networks where the positions of the agents are time-varying.
no code implementations • 7 Dec 2023 • Xu Fang, Lihua Xie
The third advantage is that more formation shapes can be realized by only tuning the positions of the leaders.
no code implementations • 17 Nov 2023 • Yucheng Wang, Yuecong Xu, Jianfei Yang, Min Wu, XiaoLi Li, Lihua Xie, Zhenghua Chen
In this paper, we propose SEnsor Alignment (SEA) for MTS-UDA, aiming to reduce domain discrepancy at both the local and global sensor levels.
no code implementations • 14 Nov 2023 • Yunjiao Zhou, Jianfei Yang, Han Zou, Lihua Xie
Through the IoT-language contrastive learning, we derive a unified semantic feature space that aligns multi-modal features with language embeddings, so that the IoT data corresponds to specific words that describe the IoT data.
no code implementations • 1 Nov 2023 • Shuai Feng, Maopeng Ran, Baoyong Zhang, Lihua Xie, Shengyuan Xu
Dynamic quantized mechanisms are designed for inter-follower communication and leader-follower communication.
no code implementations • 28 Oct 2023 • Xu Fang, Lihua Xie, Xiaolei Li
This paper studies the problem of integrated distributed network localization and formation maneuver control.
no code implementations • 29 Sep 2023 • Yunjiao Zhou, Jianfei Yang, He Huang, Lihua Xie
The results demonstrate the effectiveness and robustness of AdaPose in eliminating domain shift, thereby facilitating the widespread application of WiFi-based pose estimation in smart cities.
1 code implementation • 21 Sep 2023 • Haozhi Cao, Yuecong Xu, Jianfei Yang, Pengyu Yin, Shenghai Yuan, Lihua Xie
In this work, we propose Multi-modal Prior Aided (MoPA) domain adaptation to improve the performance of rare objects.
1 code implementation • 12 Sep 2023 • Jianan Liu, Guanhua Ding, Yuxuan Xia, Jinping Sun, Tao Huang, Lihua Xie, Bing Zhu
These provide the first benchmark and important insights for the future development of 4D imaging radar-based online 3D MOT algorithms.
1 code implementation • 11 Sep 2023 • Yucheng Wang, Yuecong Xu, Jianfei Yang, Min Wu, XiaoLi Li, Lihua Xie, Zhenghua Chen
As MTS data typically originate from multiple sensors, ensuring spatial consistency becomes essential for the overall performance of contrastive learning on MTS data.
1 code implementation • 11 Sep 2023 • Yucheng Wang, Yuecong Xu, Jianfei Yang, Min Wu, XiaoLi Li, Lihua Xie, Zhenghua Chen
For graph construction, we design a decay graph to connect sensors across all timestamps based on their temporal distances, enabling us to fully model the ST dependencies by considering the correlations between DEDT.
no code implementations • 24 Aug 2023 • Shuai Feng, Maojiao Ye, Lihua Xie, Shengyuan Xu
To solve the quantizer saturation problem caused by DoS attacks, the quantization mechanism is equipped to have zooming-in and holding capabilities, in which the holding capability is consistent with the results in quantized consensus under DoS.
no code implementations • 14 Jul 2023 • Yifei Li, Wenjie Liu, Jian Sun, Gang Wang, Lihua Xie, Jie Chen
This method utilizes measured data and a noise-matrix polytope to ensure near-optimal output synchronization.
no code implementations • 31 May 2023 • Xinlei Yi, Xiuxian Li, Tao Yang, Lihua Xie, Yiguang Hong, Tianyou Chai, Karl H. Johansson
Moreover, if the loss functions are strongly convex, then the network regret bound is reduced to $\mathcal{O}(\log(T))$, and the network cumulative constraint violation bound is reduced to $\mathcal{O}(\sqrt{\log(T)T})$ and $\mathcal{O}(\log(T))$ without and with Slater's condition, respectively.
no code implementations • 30 May 2023 • Jianfei Yang, Hanjie Qian, Yuecong Xu, Kai Wang, Lihua Xie
Unsupervised domain adaptation (UDA) involves adapting a model trained on a label-rich source domain to an unlabeled target domain.
1 code implementation • NeurIPS 2023 • Jianfei Yang, He Huang, Yunjiao Zhou, Xinyan Chen, Yuecong Xu, Shenghai Yuan, Han Zou, Chris Xiaoxuan Lu, Lihua Xie
Extensive experiments have been conducted to compare the sensing capacity of each or several modalities in terms of multiple tasks.
no code implementations • ICCV 2023 • Haozhi Cao, Yuecong Xu, Jianfei Yang, Pengyu Yin, Shenghai Yuan, Lihua Xie
In this paper, we explore Multi-Modal Continual Test-Time Adaptation (MM-CTTA) as a new extension of CTTA for 3D semantic segmentation.
1 code implementation • 17 Nov 2022 • Yuecong Xu, Haozhi Cao, Zhenghua Chen, XiaoLi Li, Lihua Xie, Jianfei Yang
Video analysis tasks such as action recognition have received increasing research interest with growing applications in fields such as smart healthcare, thanks to the introduction of large-scale datasets and deep learning-based representations.
no code implementations • 21 Sep 2022 • Dazhuo Wang, Jianfei Yang, Wei Cui, Lihua Xie, Sumei Sun
The AirFi is a novel domain generalization framework that learns the critical part of CSI regardless of different environments and generalizes the model to unseen scenarios, which does not require collecting any data for adaptation to the new environment.
1 code implementation • 30 Aug 2022 • Lang Deng, Jianfei Yang, Shenghai Yuan, Han Zou, Chris Xiaoxuan Lu, Lihua Xie
As an important biomarker for human identification, human gait can be collected at a distance by passive sensors without subject cooperation, which plays an essential role in crime prevention, security detection and other human identification applications.
no code implementations • 22 Aug 2022 • Jianfei Yang, Yunjiao Zhou, He Huang, Han Zou, Lihua Xie
Avatar refers to a representative of a physical user in the virtual world that can engage in different activities and interact with other objects in metaverse.
no code implementations • 10 Aug 2022 • Yuecong Xu, Jianfei Yang, Haozhi Cao, Min Wu, XiaoLi Li, Lihua Xie, Zhenghua Chen
To enable video models to be applied seamlessly across video tasks in different environments, various Video Unsupervised Domain Adaptation (VUDA) methods have been proposed to improve the robustness and transferability of video models.
no code implementations • 18 Jul 2022 • Maopeng Ran, Shuai Feng, Juncheng Li, Lihua Xie
This paper is concerned with the quantized consensus problem for uncertain nonlinear multi-agent systems under data-rate constraints and Denial-of-Service (DoS) attacks.
2 code implementations • 16 Jul 2022 • Jianfei Yang, Xinyan Chen, Dazhuo Wang, Han Zou, Chris Xiaoxuan Lu, Sumei Sun, Lihua Xie
WiFi sensing has been evolving rapidly in recent years.
1 code implementation • 28 May 2022 • Jianfei Yang, Xiangyu Peng, Kai Wang, Zheng Zhu, Jiashi Feng, Lihua Xie, Yang You
Domain Adaptation of Black-box Predictors (DABP) aims to learn a model on an unlabeled target domain supervised by a black-box predictor trained on a source domain.
no code implementations • 1 May 2022 • Xiuxian Li, Lihua Xie, Na Li
And the local cost function of each agent is often time-varying in dynamic and even adversarial environments.
1 code implementation • 28 Apr 2022 • Nachuan Ma, Jiahe Fan, Wenshuo Wang, Jin Wu, Yu Jiang, Lihua Xie, Rui Fan
Computer vision algorithms have been prevalently utilized for 3-D road imaging and pothole detection for over two decades.
1 code implementation • 12 Apr 2022 • Jianfei Yang, Xinyan Chen, Han Zou, Dazhuo Wang, Lihua Xie
The AutoFi transfers knowledge from randomly collected CSI samples into human gait recognition and achieves state-of-the-art performance.
no code implementations • 8 Apr 2022 • Jianfei Yang, Xinyan Chen, Han Zou, Dazhuo Wang, Qianwen Xu, Lihua Xie
WiFi technology has been applied to various places due to the increasing requirement of high-speed Internet access.
no code implementations • 4 Apr 2022 • Jianfei Yang, Han Zou, Lihua Xie
The results validate that our method works well on wireless human activity recognition and person identification systems.
no code implementations • 6 Nov 2021 • Xia Jiang, Xianlin Zeng, Jian Sun, Jie Chen, Lihua Xie
We prove that local variable estimates generated by the proposed algorithm achieve consensus and are attracted to a neighborhood of the optimal solution in expectation with an $\mathcal{O}(\frac{1}{T}+\frac{1}{\sqrt{T}})$ convergence rate, where $T$ is the total number of iterations.
no code implementations • 26 Sep 2021 • Haozhi Cao, Yuecong Xu, Jianfei Yang, Kezhi Mao, Lihua Xie, Jianxiong Yin, Simon See
This paper introduces a novel self-supervised method that leverages incoherence detection for video representation learning.
no code implementations • 9 Jun 2021 • Xinlei Yi, Xiuxian Li, Tao Yang, Lihua Xie, Tianyou Chai, Karl H. Johansson
A novel algorithm is first proposed and it achieves an $\mathcal{O}(T^{\max\{c, 1-c\}})$ bound for static regret and an $\mathcal{O}(T^{(1-c)/2})$ bound for cumulative constraint violation, where $c\in(0, 1)$ is a user-defined trade-off parameter, and thus has improved performance compared with existing results.
no code implementations • CVPR 2021 • Ruibo Li, Guosheng Lin, Lihua Xie
Due to the scarcity of annotated scene flow data, self-supervised scene flow learning in point clouds has attracted increasing attention.
Self-Supervised Learning Self-supervised Scene Flow Estimation
no code implementations • 14 May 2021 • JiaQi Zhang, Keyou You, Lihua Xie
Information compression is essential to reduce communication cost in distributed optimization over peer-to-peer networks.
no code implementations • 1 May 2021 • Xinlei Yi, Xiuxian Li, Tao Yang, Lihua Xie, Tianyou Chai, Karl H. Johansson
This is a sequential decision making problem with two sequences of arbitrarily varying convex loss and constraint functions.
no code implementations • 27 Apr 2021 • Maopeng Ran, Lihua Xie
This paper investigates the consensus problem for nonlinear heterogeneous multi-agent systems with limited communication data rate.
no code implementations • 2 Feb 2021 • Yang Lyu, Muqing Cao, Shenghai Yuan, Lihua Xie
Unmanned Aerial Vehicle (UAV) has already demonstrated its potential in many civilian applications, and the fa\c{c}ade inspection is among the most promising ones.
Pose Estimation Robotics Systems and Control Systems and Control
no code implementations • 21 Jan 2021 • Ci Chen, Lihua Xie, Yi Jiang, Kan Xie, Shengli Xie
To remove such a requirement, an off-policy reinforcement learning algorithm is proposed using only the measured output data along the trajectories of the system and the reference output.
Dynamical Systems
no code implementations • 23 Oct 2020 • Thien-Minh Nguyen, Shenghai Yuan, Muqing Cao, Yang Lyu, Thien Hoang Nguyen, Lihua Xie
However, some issues such as estimation drift and feature-dependence still remain inherent limitations.
Robotics Systems and Control Systems and Control
1 code implementation • 29 Jul 2020 • Han Wang, Chen Wang, Lihua Xie
As an essential component of visual simultaneous localization and mapping (SLAM), place recognition is crucial for robot navigation and autonomous driving.
no code implementations • ICLR 2020 • Jianfei Yang, Han Zou, Yuxun Zhou, Lihua Xie
The proposed MDAT stabilizes the gradient reversing in ARN by replacing the domain classifier with a reconstruction network, and in this manner ARN conducts both feature-level and pixel-level domain alignment without involving extra network structures.
1 code implementation • CVPR 2020 • Jiacheng Wei, Guosheng Lin, Kim-Hui Yap, Tzu-Yi Hung, Lihua Xie
To the best of our knowledge, this is the first method that uses cloud-level weak labels on raw 3D space to train a point cloud semantic segmentation network.
1 code implementation • 12 Mar 2020 • Han Wang, Chen Wang, Lihua Xie
Loop closure detection is an essential and challenging problem in simultaneous localization and mapping (SLAM).
no code implementations • 25 Feb 2020 • Han Wang, Juncheng Li, Maopeng Ran, Lihua Xie
Our method is compared with the state-of-the-art loop closure detection methods and the results show that it outperforms the traditional methods at both recall rate and speed.
no code implementations • 16 Feb 2020 • Fei Dong, Keyou You, Lihua Xie, Qinglei Hu
This paper proposes a coordinate-free controller for a nonholonomic vehicle to circumnavigate a fully-actuated moving target by using range-only measurements.
1 code implementation • IEEE Transactions on Cybernetics 2020 • Xu Fang, Chen Wang, Lihua Xie, Jie Chen
When the faster evader is allowed to move freely without any constraint, the main issues are how to form an encirclement to trap the evader into the capture domain, how to balance between forming an encirclement and approaching the faster evader, and what conditions make the capture possible.
Systems and Control Systems and Control
6 code implementations • CVPR 2019 • Chen Wang, Jianfei Yang, Lihua Xie, Junsong Yuan
Convolutional neural networks (CNNs) have enabled the state-of-the-art performance in many computer vision tasks.
no code implementations • 6 Mar 2019 • Xinlei Yi, Xiuxian Li, Lihua Xie, Karl H. Johansson
Assuming Slater's condition, we show that the algorithm achieves smaller bounds on the constraint violation.
1 code implementation • 18 Nov 2018 • Xu Fang, Chen Wang, Thien-Minh Nguyen, Lihua Xie
In addition, different from the traditional filter-based localization methods which need kinetic model for localization, our proposed method is model-free and converts the localization problem to graph optimization problem.
1 code implementation • 28 Feb 2018 • Xu Fang, Chen Wang, Thien-Minh Nguyen, Lihua Xie
In this paper, we propose a general graph optimization based framework for localization, which can accommodate different types of measurements with varying measurement time intervals.
Robotics
2 code implementations • 20 Feb 2018 • Chen Wang, Tete Ji, Thien-Minh Nguyen, Lihua Xie
Robust velocity and position estimation is crucial for autonomous robot navigation.
2 code implementations • 16 Oct 2017 • Chen Wang, Minh-Chung Hoang, Lihua Xie, Junsong Yuan
We present a novel visual SLAM method for the warehouse robot with a single downward-facing camera using ground textures.
Robotics
1 code implementation • 2017 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) 2017 • Chen Wang, Handuo Zhang, Thien-Minh Nguyen, Lihua Xie
This paper proposes an ultra-wideband (UWB) aided localization and mapping system that leverages on inertial sensor and depth camera.
Robotics
3 code implementations • 12 Sep 2017 • Chen Wang, Le Zhang, Lihua Xie, Junsong Yuan
Cross-correlator plays a significant role in many visual perception tasks, such as object detection and tracking.
no code implementations • 9 Jul 2014 • Zai Yang, Lihua Xie
This paper is concerned about sparse, continuous frequency estimation in line spectral estimation, and focused on developing gridless sparse methods which overcome grid mismatches and correspond to limiting scenarios of existing grid-based approaches, e. g., $\ell_1$ optimization and SPICE, with an infinitely dense grid.