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arXiv 2025年

作者： Huang, Zexu Xu, Min Perry, Stuart School of Electrical and Data Engineering University of Technology Sydney UltimoNSW2007 Australia

Recent advancements in 3D reconstruction coupled with neural rendering techniques have greatly improved the creation of photo-realistic 3D scenes, influencing both academic research and industry applications. The technique of 3D Gaussian Splatting and its variants incorporate the strengths of both primitive-based and volumetric representations, achieving superior rendering quality. While 3D Geometric Scattering (3DGS) and its variants have advanced the field of 3D representation, they fall short in capturing the stochastic properties of non-local structural information during the training process. Additionally, the initialisation of spherical functions in 3DGS-based methods often fails to engage higher-order terms in early training rounds, leading to unnecessary computational overhead as training progresses. Furthermore, current 3DGS-based approaches require training on higher resolution images to render higher resolution outputs, significantly increasing memory demands and prolonging training durations. We introduce StructGS, a framework that enhances 3D Gaussian Splatting (3DGS) for improved novel-view synthesis in 3D reconstruction. StructGS innovatively incorporates a patch-based SSIM loss, dynamic spherical harmonics initialisation and a Multi-scale Residual Network (MSRN) to address the above-mentioned limitations, respectively. Our framework significantly reduces computational redundancy, enhances detail capture and supports high-resolution rendering from low-resolution inputs. Experimentally, StructGS demonstrates superior performance over state-of-the-art (SOTA) models, achieving higher quality and more detailed renderings with fewer artifacts. (The link to the code will be made available after publication) Copyright © 2025, The Authors. All rights reserved.

关键词： Spheres

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Dielectric Target Imaging With THz Chipless RFID Technology

Dielectric Target Imaging With THz Chipless RFID Technology

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Australian Microwave Symposium (AMS)

作者： Meisam Esfandiari Xiaojing Lv Shaghayegh Chamani Jiexin Lai Yang Yang School of Electrical and Data Engineering University of Technology Sydney (UTS) Sydney NSW Australia

ISBN: (数字)9798350379969

ISBN: (纸本)9798350379976

Terahertz imaging is a groundbreaking technology that has broadened opportunities in non-destructive testing, medical imaging, security screening, and the arts for analyzing ancient artifacts. This study presents a chipless RFID array specifically designed for THz imaging. The chipless RFID is placed on a phantom containing a rectangular rubber object. A THz waveguide is then directed toward it, scanning 6 points on the phantom. Finally, the target image and its location are reconstructed using the Delay and Sum method.

关键词： Terahertz wave imaging Phantoms Rectangular waveguides Chipless RFID Delays Rubber Security Image reconstruction Testing Radiofrequency identification

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Energy-Efficient and Intelligent ISAC in V2X Networks with Spiking Neural Networks-Driven DRL

arXiv

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arXiv 2025年

作者： Shang, Chen Yu, Jiadong Hoang, Dinh Thai Guangdong Guangzhou China The School of Electrical and Data Engineering University of Technology Sydney Australia

As the paradigm of wireless communication networks transition from 5G to 6G, integrated sensing and communication (ISAC) has emerged as a pivotal technology for enabling vehicle-to-everything (V2X) connectivity, mobility, and security. However, designing efficient beamforming schemes to achieve accurate sensing and enhance communication performance in the dynamic and uncertain environments of V2X networks presents significant challenges. While artificial intelligence (AI) technologies offer promising solutions, the energy-intensive nature of neural networks imposes substantial burdens on communication infrastructures. To address these challenges, this work proposes an energy-efficient and intelligent ISAC system for V2X networks. Specifically, we first leverage a Markov Decision Process framework to model the dynamic and uncertain nature of V2X networks. This framework allows the roadside unit (RSU) to develop beamforming schemes relying solely on its current sensing state information, eliminating the need for numerous pilot signals and extensive channel state information acquisition. To endow the system with intelligence and enhance its performance, we then introduce an advanced deep reinforcement learning (DRL) algorithm based on the Actor-Critic framework with a policy-clipping technique, enabling the joint optimization of beamforming and power allocation strategies to guarantee both communication rate and sensing accuracy. Furthermore, to alleviate the energy demands of neural networks, we integrate Spiking Neural Networks (SNNs) into the DRL algorithm. By leveraging discrete spikes and their temporal characteristics for information transmission during training and inference, SNNs not only significantly reduce the energy consumption of deploying AI model in ISAC-assisted V2X networks but also further enhance algorithm performance. Extensive simulation results validate the effectiveness of the proposed scheme with lower energy consumption, superior communication

关键词： Markov processes

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Millimeter-Wave Curved Cylindrical Waveguide Sensor for Early Detection of Melanoma

Millimeter-Wave Curved Cylindrical Waveguide Sensor for Earl...

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Australian Microwave Symposium (AMS)

作者： Meisam Esfandiari Xiaojing Lv Shaghayegh Chamani Jiexin Lai Yang Yang School of Electrical and Data Engineering University of Technology Sydney (UTS) Sydney NSW Australia

ISBN: (数字)9798350379969

ISBN: (纸本)9798350379976

This paper explores using RFID sensing technology to monitor soft skin moisture, enhance skincare routines, and improve health management. The proposed sensor features a curved cylindrical Teflon or Rogers AD 600 core coated with copper film, with a segment removed to create a sensing section. An analysis of the sensor's electric field response and power flow on the skin reveals significant differences in transmitted wave values between dry skin and melanoma in the 76 GHz to 80 GHz range, enabling precise detection of skin moisture levels.

关键词： Millimeter wave technology Moisture Melanoma Skin Sensors Copper Electric fields Monitoring Radiofrequency identification Load flow

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On Strong Secrecy for Multiple Access Channels With States and Causal CSI

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IEEE Transactions on Information Theory 2025年第4期71卷 3070-3099页

作者： Chen, Yiqi Oechtering, Tobias J. Skoglund, Mikael Luo, Yuan Technical University of Munich Chair of Theoretical Information Technology Munich80333 Germany Shanghai Jiao Tong University Department of Computer Science and Engineering Shanghai200240 China KTH Royal Institute of Technology Division of Information Science and Engineering School of Electrical Engineering and Computer Science Stockholm100 44 Sweden Shanghai Key Laboratory of Trusted Data Circulation and Governance and Web3 Shanghai200240 China

Strong secrecy communication over a discrete memoryless state-dependent multiple access channel (SD-MAC) with an external eavesdropper is investigated. The channel is governed by discrete memoryless and i.i.d. channel states, and the channel state information (CSI) is revealed to the encoders in a causal manner. The main results of this paper are inner and outer bounds of the capacity region, for which we investigate coding schemes incorporating wiretap coding and secret key agreements between the sender and the legitimate receiver. Two kinds of block Markov coding schemes are proposed. The first is a new coding scheme that uses backward decoding and the Wyner-Ziv coding, and the secret key is constructed from a lossy description of the CSI. The other is an extended version of an existing coding scheme for point-to-point wiretap channels with causal CSI. A numerical example shows that the achievable region given by the first coding scheme can be strictly larger than the second one. However, these two schemes do not outperform each other in general, and there exist some numerical examples in which each coding scheme achieves some rate pairs that cannot be achieved by another scheme. Our established inner bound reduces to some best-known results in the literature as special cases. We further investigate some capacity-achieving cases for state-dependent multiple access wiretap channels (SD-MAWCs) with degraded message sets. It turns out that the two coding schemes are both optimal in these cases. © 1963-2012 IEEE.

关键词： Markov processes

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3D-Printed Multi-Band FSS with Near-Equal Fractional Pass-/Stop-Band Divisions

3D-Printed Multi-Band FSS with Near-Equal Fractional Pass-/S...

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European Conference on Antennas and Propagation, EuCAP

作者： Xiaojing Lv Zhen Luo Yang Yang School of Mechanical and Mechatronic Engineering University of Technology Sydney Australia School of Electrical and Data Engineering University of Technology Sydney Australia

ISBN: (数字)9788831299107

ISBN: (纸本)9798350366327

This paper presents a frequency-selective surface (FSS) design fabricated by 3D printing techniques and metallization processes. The double-layer spatial filter consists of concentric resonant rings within the hexagonal unit cells, which alternately generate three passbands and two stopbands with equal fractional bandwidths (FBWs). Each passband or stopband contains two transmission poles and zeros, with sharp transitions in the roll-off regions. The tunability can be achieved by reconfiguring the dielectric insertion plate with varied effective permittivities and thickness profiles.

关键词： Metallization Resonant frequency Three-dimensional printing Spatial filters Robustness Dielectrics Passband Resonators Wideband Surface treatment

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8th International Congress on Edge Computing, EDGE 2024, Held as Part of the Services Conference Federation, SCF 2024

作者： Tian, Yun Wu, Bin Shi, Jiaoli Zhang, Caicai Xu, Du School of Computer and Big Data Science Jiujiang University Jiujiang332005 China Jiujiang Key Laboratory of Network and Information Security Jiujiang332005 China School of Modern Information Technology Zhejiang Polytechnic University of Mechanical and Electrical Engineering Hangzhou310053 China

ISBN: (纸本)9783031770685

The development of cloud computing and the widespread application of cloud services have made outsourcing services more convenient. The need for individuals and businesses to store and manipulate the graph data they generate is growing rapidly. The unreliability and insecurity of cloud servers make outsourcing graph data a great risk of information leakage. To effectively protect data security, encrypting outsourced data is a useful method. The adjacent vertex query is a very commonly used and fundamental operation, and similarity search is a widely used and powerful tool to improve the scope and functionality of queries. After outsourcing encrypted sparse graph data to cloud servers, it becomes very inconvenient to use and manipulate the data. In this work, we present a scheme to realize the adjacent vertex query supporting similarity search on sparse graph data in cloud environment (SSAQ), which also protects the security of the information. This work uses edit distance and the searchable encryption principle to construct query index, and next implement the similar adjacent vertex query on cloud server. This work provides a formal security analysis, and also gives the experimental comparison and analysis. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Information leakage

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New extended sidon spaces with dimension k+1 8

New extended sidon spaces with dimension k+1

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2024 8th International Conference on Mechanics, Mathematics and Applied Physics, ICMMAP 2024

作者： Wu, Lingling Li, Yu Fang, Lin Niu, Yongfeng College of Electrical Engineering Changzhou Vocational Institute of Mechatronic Technology Changzhou213164 China School of Computer Science and Artificial Intelligence and Aliyun School of Big Data Changzhou University Changzhou213164 China China Telecom Anhui Branch Hefei230071 China

In recent years, Sidon spaces have gained great popularity and applications in various fields such as multi-antenna communication systems, distributed storage systems, multimedia transmission, and network coding. With our further research into this field, it becomes evident that Sidon spaces are crucial in the field of constructing cyclic subspace codes. Currently, lots of papers focuse on how to construct Sidon spaces. Researchers find that through using the roots of irreducible polynomials and primitive elements over finite fields, we can sucessfully construct them. Based on the significant research conducted by previous scholars, we obtain several Sidon spaces which have new cardinality. Moreover, these Sidon spaces is beneficial to help us obtain better-performance subspace codes. © Published under licence by IOP Publishing Ltd.

关键词： Network coding

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An Efficient Direct Downlink Sensing Method Using 5G NR SSB Signals in Perceptive Mobile Networks

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IEEE Internet of Things Journal 2025年第11期12卷 15360-15369页

作者： Li, Hang Xiang, Yang Guo, Qinghua Liu, Lizhe Huang, Xiaojing Cheng, Zhiqun Pang, Yashan Hangzhou Dianzi University School of Electronics and Information Hangzhou310018 China Academy of Network and Communications of CETC National Key Laboratory of Advanced Communication Networks Hebei Shijiazhuang050081 China University of Wollongong School of Electrical Computer and Telecommunications Engineering WollongongNSW2522 Australia University of Technology Sydney Global Big Data Technologies Centre UltimoNSW2007 Australia

In perceptive mobile networks (PMNs), using 5G New Radio (NR) signals for direct sensing poses a significant challenge to practical implementation due to the high computational complexity involved in estimating sensing parameters. In this paper, an efficient sensing method is proposed to incorporate both downlink active sensing and passive sensing to estimate multiple sensing parameters, including delays, angle of arrival (AoA), angle of departure (AoD) and Doppler. In particular, it exploits the synchronization signal blocks (SSBs) to facilitate sensing with multiple remote radio units (RRUs). To reduce the computational complexity of direct sensing, a sparse model is developed to decouple multiple sensing parameter estimation, enabling efficient sensing method design. Then, leveraging unitary approximate message passing (UAMP) and sparse Bayesian learning (SBL), we propose an efficient method to achieve parameter estimation and association with corresponding RRUs. This method is further extended to general scenarios involving multiple path components with the same delay. Extensive simulations demonstrate the effectiveness of the proposed method, showing that it outperforms existing ones in terms of sensing accuracy and complexity. © 2014 IEEE.

关键词： 5G mobile communication systems

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Evolutionary Paths to Systematically Unlocking the Frequency-Selective Potential of 3D Meta-Atoms

Evolutionary Paths to Systematically Unlocking the Frequency...

引用

Australian Microwave Symposium (AMS)

作者： Xiaojing Lv Zhen Luo J. Scott Tyo Yang Yang School of Electrical and Data Engineering University of Technology Sydney Australia School of Mechanical and Mechatronic Engineering University of Technology Sydney Australia Department of Electrical and Computer Systems Engineering Monash University Australia

ISBN: (数字)9798350379969

ISBN: (纸本)9798350379976

This paper highlights the benefits of advanced multi-material 3D printing technology in enhancing the electromagnetic performance of metasurfaces. By systematically evolving geometric structures, the proposed bandpass filtering meta-atom outperforms existing designs in key metrics, including bandwidth, out-of-band suppression, in-band insertion loss, and transition band steepness, underscoring the significant potential of 3D unit cells. Through the integration of qualitative approach and semi-analytical design algorithm, the geometric topology is fully optimized without imposing substantial computational demands.

关键词： Measurement Electric potential Filtering Insertion loss Bandwidth Three-dimensional printing Metasurfaces Topology Microwave filters Electromagnetics

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