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Automatic Face Expression Neutralisation and Posture Correction via 3D Contrastive Learning

Procedia Computer Science 2023年 225卷 269-278页

作者： Grina Wiem Douik Ali University of Sousse Networked Objects Control and Communication Systems Laboratory National School of Engineers of Sousse Sousse Technology Center Sahloul Belt Road 4054 University of Monastir National Engineering School of Monastir Rue Ibn Jazzar Monastir 5035 Tunisia University of Sousse Networked Objects Control and Communication Systems Laboratory National School of Engineers of Sousse Sousse Technology Center Sahloul Belt Road 4054 Tunisia

The performance of recognition systems can be significantly affected by various factors, with facial expression poses and lighting changes being the main confounding factors. In order to minimize their impact, we propose an intriguing method in this study that enables the generation of high-quality images specifically tailored to the target domain. Our objective is to utilize disentangled representation to effectively model the decomposition of data variations and generate neutral facial expression images with frontal posture and adaptive illumination. To achieve this, we incorporate 3D priors in the adversarial learning during the training process, simulating the generation of an analytical 3D face deformation as well as rendering operations. Additionally, we employ contrastive learning to control the disentanglement of the generated faces while preserving the essential properties of facial features. This technique enables us to learn an embedding space in which similar data samples are represented closely, while distinct samples are kept far apart from each other. Furthermore, we conduct an analysis of the learned latent space and introduce several other significant properties that enhance the reinforcement of factor disentanglement. These properties include an imitation learning algorithm, which facilitates the acquisition of meaningful patterns and characteristics.

关键词： generative adversarial network expression neutralization disentanglement 3D contrastive learning

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FFGAN: An Auto-supervised Approach for Frontal Face Generation Via Disentangled Contrastive Learning

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Procedia Computer Science 2024年 246卷 3644-3653页

作者： Grina Wiem Douik Ali National Engineering School of Monastir University of Monastir Rue Ibn Jazzar 5035 Monastir Tunisia Networked Objects Control and Communication Systems Laboratory Sousse Technology Centre National School of Engineers of Sousse University of Sousse Sahloul Belt Road 4054 Sousse Tunisia

This work proposes a novel generative model, FF-GAN (Frontal Face Generative Adversarial Network), for generating high-quality and diverse frontal faces. FF-GAN utilizes contrastive learning to effectively learn the underlying representation of frontal faces from unlabeled image datasets. This approach allows the model to capture the essential characteristics of frontal faces without the need for explicit pose annotations. We evaluate the performance of FF-GAN using established metrics like FID (Fréchet Inception Distance), IS (Inception Score), and SSIM (Structural Similarity Index measure). The results demonstrate that FF-GAN achieves superior performance compared to existing methods, generating highly realistic and visually appealing frontal faces with exceptional structural coherence. This research contributes to the field of facial image generation by introducing an effective unsupervised learning approach based on contrastive learning for generating high-quality frontal faces.

关键词： Unsupervised Facial Pose Analysis Contrastive Learning Disentanglement Pose Estimation

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Load Balancing Routing Algorithm for LEO Satellite Networks Based on Ant Colony Optimization

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Internet technology Letters 2025年第3期8卷

作者： Zhi, Ruxin Wang, Jiahui Xu, Zhan Key Laboratory of Information and Communication Systems Ministry of Information Industry Beijing Information Science and Technology University Beijing China Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing Information Science and Technology University Beijing China School of Information and Communication Engineering Beijing Information Science and Technology University Beijing China

To address the problem of the unbalanced load and optimize the traffic distribution of large-scale low earth orbit (LEO) satellite networks, this paper proposes a load-balancing routing algorithm for LEO satellite networks based on ant colony optimization. The algorithm establishes the global optimal initial path through the improved ant colony algorithm to bypass the network bottleneck, makes local adjustments to cope with burst traffic changes to avoid congestion, and optimizes the "inferior" paths through regular rerouting to improve the overall network performance. The results show that the algorithm performs well in terms of packet loss rate, throughput, and load balancing, which can effectively alleviate the link utilization imbalance problem and provide a more stable and efficient service for the satellite network. Among them, the packet loss rate is reduced by 7.8%, and the load distribution index is improved by 30%. © 2025 The Author(s). Internet technology Letters published by John Wiley & Sons Ltd.

关键词： Ant colony optimization

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Air-Ground Collaborative control for Angle-Specified Heterogeneous Formations

IEEE Transactions on Intelligent Vehicles

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IEEE Transactions on Intelligent Vehicles 2024年 1-13页

作者： Chen, Liangming Xiao, Jiaping Teo, Clarence Wei Rui Li, Jianqing Feroskhan, Mir School of System Design and Intelligent Manufacturing and Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and Technology Shenzhen China school of Mechanical and Aerospace Engineering Nanyang Technological University Singapore Singapore College of Communication Engineering Hangzhou Dianzi University Hangzhou China

The need for better search and rescue capabilities has led to the increased demand for collaborative aerial-ground multi-robot deployments. However, most existing solutions require high communication bandwidth or bulky sensor equipment that is not suitable especially for aerial robots. To make the execution of these tasks more efficient, this paper proposes an angle-specified heterogeneous leader-follower formation framework consisting of unmanned aerial vehicles (UAVs) flying in a 3D space and ground robots moving in a 2D plane. The UAVs are controlled to maintain a desired angle-specified formation with the first three UAVs as the leaders forming a triangular shape and the remaining UAVs as the followers. The follower UAVs only need direction measurements to track the leader UAVs. For the ground robots, two leader robots track the UAV group and determine the orientation and scale of the ground formation, while the follower robots track the leader robots using only direction measurements. The proposed heterogeneous formation framework is energy-efficient as most robots only require low-cost and lightweight direction measurements. The stability of the proposed formation control algorithms is proved and validated through various physical application experiments. IEEE

关键词： Multi agent systems

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Physical layer security verification system based on software defined radio 4

Physical layer security verification system based on softwar...

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4th International Conference on Computer Science and communication technology, ICCSCT 2023

作者： Liu, Yonghuang Song, Huanhuan Wen, Hong Yu, Ziyang Li, Wen School of Aeronautics and Astronautics University of Electronic Science and Technology of China Sichuan Chengdu611731 China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Lab. of Sichuan Province University of Electronic Science and Technology of China Sichuan Chengdu611731 China Intelligent IoT Communication Technology Engineering Research Center of Sichuan Province University of Electronic Science and Technology of China Sichuan Chengdu611731 China

ISBN: (纸本)9781510671232

Compared with traditional encryption technology, physical layer security technology uses channel noise to realize the key with the same length as plaintext. Even if the eavesdropper has strong cracking computing power, it cannot decipher the confidential data without the key, which can truly realize "One-Time-Pad" and ensure the security of wireless communication. In this paper, we propose a physical layer security verification system based on software defined radio. In the system, base stations and legitimate users can obtain channel information efficiently, and eavesdroppers can use the powerful storage and computing resources of the cloud server to decrypt confidential signals without time constraints. Based on the system, this paper designs and verifies the physical layer security scheme with joint precoding and Artificial Noise, which fills the gap of the prototype verification platform of information-theoretic security and provides strong support for verifying the unconditional security features of the physical layer security technology. © 2023 SPIE.

关键词： Verification

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USRP-based real-time experimentation platform for artificial-noise-aided MIMO system 4

USRP-based real-time experimentation platform for artificial...

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4th International Conference on Computer Science and communication technology, ICCSCT 2023

作者： Yu, Ziyang Song, Huanhuan Wen, Hong Liu, Yonghuang Li, Wen Hou, Wenjing School of Aeronautics and Astronautics University of Electronic Science and Technology of China Sichuan Chengdu611731 China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Lab. of Sichuan Province University of Electronic Science and Technology of China Sichuan Chengdu611731 China Intelligent IoT Communication Technology Engineering Research Center of Sichuan Province University of Electronic Science and Technology of China Sichuan Chengdu611731 China

ISBN: (纸本)9781510671232

Artificial noise, as a physical layer security technique, differs from traditional communication security mechanisms based on cryptography as it cannot be easily cracked by rapidly developing computational power. The theoretical research on the security of artificial-noise-assisted MIMO (Multiple-Input Multiple-Output) communication systems is quite comprehensive. However, the practical effectiveness of artificial noise in real-world systems still needs to be further validated through experimentation. This paper proposes a real-time platform for simulating experiments on MIMO communication systems assisted by artificial noise. By analyzing experimental data, it demonstrates that artificial noise has a slight impact on the reliability of legitimate MIMO communication systems while effectively enhancing system security. © 2023 SPIE.

关键词： MIMO systems

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Reliability Study of Leo Satellite Networks Based on Random Linear Network Coding

Reliability Study of Leo Satellite Networks Based on Random ...

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Acoustics, Speech, and Signal Processing Workshops (ICASSPW), IEEE International Conference on

作者： Jiahui Wang Zan Xu Ruxin Zhi Liming Wang School of Electronics and Communication Engineering Beijing Information Science and Technology University China Key Laboratory of Information and Communication Systems Ministry of Information Industry Beijing Information Science and Technology University China Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing Information Science and Technology University China

ISBN: (数字)9798350374513

ISBN: (纸本)9798350374520

This paper proposes a random linear network coding method tailored for data transmission within Low Earth Orbit (LEO) constellation networks to address the challenges of long delay and high bit error rates (BER) in LEO satellite networks. The method employs a link quality-aware strategy, enabling dynamic adjustment of source-side redundancy based on the corresponding link quality to maximize network fault tolerance with minimal overhead. Validation using the OMNET++ discrete event simulation platform indicates that the proposed method performs well in LEO satellite networks of various scales and configurations, exhibiting superior performance in more extensive networks. In particular, in the 300-LEO and 200-LEO scenarios, the proposed method demonstrates a successful delivery rate improvement of 19.6% and 18.73%, respectively, compared to traditional single-path approaches. This method is deemed more suitable for application in dynamic satellite networks with large hop counts.

关键词： Satellite constellations Satellites Bit error rate Fault tolerant systems Low earth orbit satellites Termination of employment Network coding

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Perceptual Attribute Analysis of Objective Acoustic Parameters of Musical Instrument Timbre

Perceptual Attribute Analysis of Objective Acoustic Paramete...

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2021 International Conference on Culture-Oriented Science and technology, ICCST 2021

作者： Liu, Jingyu Chen, Yuqu Ran, Can Huang, Yongzhan Jiang, Wei Ministry of Culture and Tourism Communication University of China Key Laboratory of Acoustic Visual Technology and Intelligent Control System Beijing China Communication University of China School of Information and Communication Engineering Beijing China

ISBN: (纸本)9781665442541

The timbre attributes are affected by multiple factors such as the time domain, frequency domain, time-frequency domain, and harmonic structure of the sound signal, and there is a certain degree of correlation and redundancy among the objective acoustic parameters. Analyzing the perception of the objective acoustic parameters of the timbre Attributes is of great significance to the study of timbre perception. In order to achieve the above goals, this paper constructs a timbre database of Chinese and Western musical monophonic instruments, and extracts 45 timbre objective acoustic parameters based on this database. through factor analysis of these acoustic parameters, it shows that the Information of 45 timbre objective acoustic parameters can be condensed into 6 factors, and each factor has a clear timbre perception attribute. Based on this result, we use the multi-dimensional scale analysis method to verify the six factors, and the verification results are basically consistent with the factor analysis results. The 6 factors constructed can explain the time-frequency domain distribution, structure and energy distribution of acoustic parameters, and provide a theoretical basis for constructing an interpretable model based on audio objective acoustic parameters. © 2021 IEEE.

关键词： Multivariant analysis

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Design and Implementation of a Scattered Wireless Spectrum Sensor Network System 4

Design and Implementation of a Scattered Wireless Spectrum S...

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4th IEEE International Conference on Electronics technology, ICET 2021

作者： Zhang, Ke Fu, Cheng Niu, Yong Yang, Shuangmao Liu, Jieyan University of Electronic Science and Technology of China Science and Technology on Electronic Information Control Laboratory School of Computer Science and Engineering Chengdu China University of Electronic Science and Technology of China School of Information and Communication Engineering Chengdu China

ISBN: (纸本)9781728176734

With the increasing shortage of wireless spectrum resources, it is urgent to monitor and utilize the limited wireless spectrum resources rationally. In this paper, a scattered wireless spectrum sensor network system is proposed and applied to electromagnetic spectrum monitoring in a city environment. We design a wireless spectrum sensor node and wireless spectrum sensor network, then develop a city wireless spectrum monitoring software system. We describe the network architecture and software design process in detail and then design several experiments to test the system. The results show that our system can satisfy the electromagnetic spectrum environment monitor requirements. © 2021 IEEE.

关键词： Zigbee

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Novel indoor positioning system based on ultra-wide bandwidth

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Visual Computing for Industry,Biomedicine,and Art 2020年第1期3卷 1-6页

作者： Zhen Wei Rui Jiang Xing Wei Yun-An Cheng Lei Cheng Cai Wang School of Computer and Information Hefei University of TechnologyHefei 230009China Engineering Research Center of Safety-critical Industry Measure and Control Technology of Ministry of Education Hefei 230009China School of Mechanical Engineering Hefei University of TechnologyHefei 230009China

To tackle challenges such as interference and poor accuracy of indoor positioning systems,a novel scheme based on ultra-wide bandwidth(UWB)technology is ***,we illustrate a distance measuring method between two UWB ***,a Taylor series expansion algorithm is developed to detect coordinates of the mobile node using the location of anchor nodes and the distance between *** results show that the observation error under our strategy is within 15 cm,which is superior to existing *** final experimental data in the hardware system mainly composed of STM32 and DW1000 also confirms the performance of the proposed scheme.

关键词： Indoor positioning Ultra-wide bandwidth Position algorithm Hardware platform

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