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A Secure Storage and Verification Framework Based on Consortium Blockchain for Engineering Education Accreditation Data

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Computers, Materials and Continua 2025年第3期83卷 5323-5343页

作者： Luo, Yuling Lin, Xiaoguang Liu, Junxiu Fu, Qiang Qin, Sheng Min, Zhen Hu, Tinghua Guangxi Key Laboratory of Brain-Inspired Computing and Intelligent Chips School of Electronic and Information Engineering Guangxi Normal University Guilin 541004 China Key Laboratory of Nonlinear Circuits and Optical Communications Guangxi Normal University Education Department of Guangxi Zhuang Autonomous Region Guilin 541004 China

The majors accredited by the Engineering Education Accreditation (EEA) reflect the accreditation agency’s recognition of the school’s engineering programs. Excellent accreditation management holds significant importance for the advancement of engineering education programs. However, the traditional engineering education system framework suffers from the opacity of raw education data and the difficulty for accreditation bodies to forensically examine the self-assessment reports. To solve these issues, an EEA framework based on Hyperledger Fabric blockchain technology is proposed in this work. Firstly, all relevant stakeholders and information interactions occur within the blockchain network, ensuring the authenticity of educational data and enhancing the transparency of accreditation processes. Secondly, multiple roles are abstracted into a single organization to optimize the network topology. The original data is stored off-chain, and the hash values of the data are stored on-chain to reduce on-chain storage costs. The experimental results show that the proposed framework has a high throughput and the network latency of writing data to the blockchain is reduced by at least 0.04 s. It effectively improves network performance and security, which provides new insights for EEA management. Copyright © 2025 The Authors.

关键词： Blockchain distributed store engineering education accreditation hyperledger fabric

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Silicon computational spectrometer with 32-channel meta-structures

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Optics Letters 2025年第3期50卷 848-851页

作者： She, Zeruihong Zhang, Tianyue Wang, Kai Tan, Hongren Zhang, Lei School of Integrated Circuits Beijing University of Posts and Telecommunications Beijing100876 China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing100876 China

We present a compact silicon-on-insulator computational spectrometer utilizing a 32-channel meta-structure array. By exploiting the high design flexibility of meta-structures, each channel is engineered to possess a distinct transmission spectrum, facilitating high-resolution spectral reconstruction. The meta-structures, with a minimum feature size of 70 nm, occupy a footprint of 1.15 µm × 24.5 µm per channel. Experimental results corroborate the device’s performance, demonstrating a spectral resolution of 50 pm in the C-band. © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Silicon on insulator technology

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Polynomial geometric transformation based on IGZO charge trapping RAM array for machine vision calibration

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Science China(Information Sciences) 2025年第06期 182-190页

作者： Lin BAO Haisu ZHANG Zongwei WANG Linbo SHAN Cuimei WANG Yimao CAI Shanguo HUANG State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications School of Integrated Circuits Beijing Advanced Innovation Center for Integrated CircuitsPeking University

Polynomial geometric transformation(PGT) algorithms are commonly employed in the domain of machine vision calibration. As image resolution escalates, the computational demand of the PGT algorithm surges, posing significant challenges to both the computing power and energy efficiency of the device. In this study, we propose a In-Ga-Zn oxide(IGZO)-based charge trapping random access memory(CT-RAM) device, utilizing the Pao-Sah equation, for the three-operand multiplication(TM) operation within the PGT algorithm. This innovation allows for the TM operation of unsigned operands, achieving an 83% reduction in hardware overhead compared to traditional CMOS solutions. Additionally, we introduce a three-operand multiplication unit(TMU) of signed operands and a PGT core that is built upon the CT-RAM array, both of which are well-suited for the PGT algorithm. The CT-RAM-based PGT system boasts a throughput of 117 Mpixels/s and an energy efficiency of 3.24 Gpixels/W. Given the high parallelism of in-memory computing, the technical approach presented in this work holds immense potential for enhancing energy efficiency, paving the way for the extensive application of in-memory computing technology in the field of machine vision.

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optical Phased Array Receiver Field of View Extension using Higher Order Spatial Modes

Optical Phased Array Receiver Field of View Extension using ...

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IEEE International Conference on Group IV Photonics

作者： Enge Zhang Lei Zhang State Key Laboratory of Information Photonics and Optical Communications and School of Integrated Circuits Beijing University of Posts and Telecommunications Beijing China

We experimentally demonstrate that using higher order spatial modes can effectively improve the field of view and receiving efficiency of an optical phased array receiver.

ISBN: (数字)9798331506186

ISBN: (纸本)9798331506193

We experimentally demonstrate that using higher order spatial modes can effectively improve the field of view and receiving efficiency of an optical phased array receiver.

关键词： Phased arrays Laser radar optical design Particle separators optical device fabrication Systems architecture Silicon photonics optical receivers optical arrays

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Theoretical Calibration of Phase Errors in optical Phased Arrays

Theoretical Calibration of Phase Errors in Optical Phased Ar...

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IEEE International Conference on Group IV Photonics

作者： Enge Zhang Yichen Zhang Lei Zhang School of Integrated Circuits and State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing China School of Electronic Engineering and State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing China

This paper presents, for the first time, a comprehensive theory-based calibration method for the phase error of the optical phased array (OPA) LiDAR, which is experimentally validated using a 16-channel OPA chip.

ISBN: (数字)9798331506186

ISBN: (纸本)9798331506193

关键词： Phased arrays Laser radar Antenna theory Silicon photonics Adaptive optics Calibration Power generation optical arrays

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Enhancing the Robustness of Random Boolean Networks by Epigenetic Regulation

IEEE Transactions on Computational Biology and Bioinformatic...

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IEEE Transactions on Computational Biology and Bioinformatics 2025年第1期22卷 261-270页

作者： Junxiu Liu Jufang Dai Qiang Fu Min Su Yuling Luo Sheng Qin Su Yang Lingxi Ma Guangxi Key Lab of Brain-inspired Computing and Intelligent Chips School of Electronic and Information Engineering Guangxi Normal University Guilin China Education Department of Guangxi Zhuang Autonomous Region Key Laboratory of Nonlinear Circuits and Optical Communications Guangxi Normal University Guilin China Department of Computer Science Swansea University Swansea U.K.

Random Boolean Network (RBN) is a type of regulatory network in which the nodes have Boolean values representing their states. The robustness of RBNs against perturbations is a crucial characteristic, and there has been a growing interest in enhancing the network's robustness. In this study, a biologically inspired epigenetic regulation method is proposed to enhance the robustness of the RBNs. A frequency encoding method based on pulse counting is employed to encode the node states within a sliding time window, thereby improving the form of epigenetic regulation. To verify the performance of this method, an antifragility indicator is adopted to measure the robustness of RBNs and yeast cell networks at different scales. The experimental results demonstrate that the networks with epigenetic regulation exhibit excellent robustness, even in the presence of large-scale networks and severe perturbations. This approach provides a new perspective and idea for designing robust RBNs and discrete networks.

关键词： Epigenetics Robustness Regulation Perturbation methods Complexity theory DNA Gene expression Evolution (biology) Encoding Computational biology

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Task Offloading in Dynamic Energy Splitting STAR-RIS Assisted NOMA-MEC Systems with Decomposition Based Multi-Agent DRL

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IEEE Transactions on Vehicular Technology 2025年

作者： Lu, Baoshan Fang, Junli Hong, Xumin Shi, Jianghong Guilin University of Electronic Technology Guangxi Wireless Broadband Communication and Signal Processing Key Laboratory Guilin541004 China Guangxi Normal University Key Laboratory of Nonlinear Circuits and Optical Communications Guilin541004 China Guangxi Normal University Guangxi Key Lab of Multi-source Information Mining & Security Guilin541004 China Xiamen University Department of Informatics and Communication Engineering Xiamen361000 China

This paper explores a system that integrates non-orthogonal multiple access (NOMA) with mobile edge computing (MEC), supported by a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) in energy splitting (ES) mode. We aim to address the challenge of minimizing energy consumption over the long-term by modeling it as a non-convex optimization problem. To simplify the resolution of this complex issue, we introduce a decomposition approach using a multi-agent deep reinforcement learning (DRL) technique. Specifically, we decompose the problem into the sub-problems of computational resource and power allocation, and phase shifting, amplitude coefficient, offloading ratio, and time optimization. Based on theoretical derivations, we determine the optimal computational resource and power allocation for the given phase shifting, amplitude coefficient, offloading ratio, and time. Then, we propose a multi-agent twin delayed deep deterministic policy gradient (TD3) algorithm to jointly optimize phase shifting, amplitude coefficient, offloading ratio, and time for each time slot. Simulation outcomes demonstrate that the decomposition-based multi-agent TD3 (DB-MATD3) algorithm achieves faster convergence compared to conventional centralized DRL approaches. Compared with other existing methods, the proposed task offloading strategy, which employs the ES-based STAR-RIS, achieves energy savings of 28.7% to 40.8%. © 2025 IEEE.

关键词： Convex optimization

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Polynomial geometric transformation based on IGZO charge trapping RAM array for machine vision calibration

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SCIENCE CHINA Information Sciences 2025年第6期68卷

作者： Lin BAO Haisu ZHANG Zongwei WANG Linbo SHAN Cuimei WANG Yimao CAI Shanguo HUANG State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing 100876 China School of Integrated Circuits Beijing Advanced Innovation Center for Integrated Circuits Peking University Beijing 100871 China

Polynomial geometric transformation (PGT) algorithms are commonly employed in the domain of machine vision calibration. As image resolution escalates, the computational demand of the PGT algorithm surges, posing significant challenges to both the computing power and energy efficiency of the device. In this study, we propose a In-Ga-Zn oxide (IGZO)-based charge trapping random access memory (CT-RAM) device, utilizing the Pao-Sah equation, for the three-operand multiplication (TM) operation within the PGT algorithm. This innovation allows for the TM operation of unsigned operands, achieving an 83% reduction in hardware overhead compared to traditional CMOS solutions. Additionally, we introduce a three-operand multiplication unit (TMU) of signed operands and a PGT core that is built upon the CT-RAM array, both of which are well-suited for the PGT algorithm. The CT-RAM-based PGT system boasts a throughput ofłinebreak 117 Mpixels/s and an energy efficiency of 3.24 Gpixels/W. Given the high parallelism of in-memory computing, the technical approach presented in this work holds immense potential for enhancing energy efficiency, paving the way for the extensive application of in-memory computing technology in the field of machine vision.

关键词： in-memory computing oxide semiconductor polynomial evaluation charge trapping device

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Fe-Loaded Two-Dimensional Nitrogen-Doped Carbon for Electromagnetic Wave Absorption

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Chinese Physics Letters 2024年第12期41卷 202-209页

作者： Xi Wen Yang Qin Yu Hao Geng Chang Kai Huang Ming Lei Xiaojun Shen Yong He Xuchao Pan Yufeng Wu Ministerial Key Laboratory of ZNDY Nanjing University of Science&TechnologyNanjing 210094China State Key Laboratory of Information Photonics and Optical Communications School of Integrated CircuitsBeijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Information Photonics and Optical Communications School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China

Electromagnetic wave-absorbing materials play a crucial role in modern electronics,particularly in stealth and communication ***-based materials demonstrate considerable potential for the development and use of effective wave-absorbing substances,attributed to their complex structure,lightweight nature,excellent corrosion resistance,and ***,nitrogen-doped carbon-based two-dimensional(2D)materials exhibit a more pronounced depletion effect on electromagnetic waves owing to their increased specific surface area and numerous polarization *** article presents the successful synthesis of nitrogen-doped carbon(NC)2D flakes using a hydrothermal *** addition,single Fe atoms were successfully incorporated onto their surfaces,forming Fe@*** wave-absorbing capabilities of the Fe@NC samples were considerably improved,achieving a minimum reflection loss(RLmin)of−69.22 dB at 11.48 GHz and an effective absorption bandwidth of 5.79 *** enhancement in electromagnetic wave absorption is attributed to the synergistic effects of magnetic loss,relaxation processes,dipole polarization,and electrical conduction *** successful synthesis of Fe@NC opens up new avenues for the development of atomically dispersed wave-absorbing materials.

关键词： corrosion absorbing Electromagnetic

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Zn_(0.5)Co_(0.5)Mn_(0.5)Fe_(0.5)Al_(0.5)Mg_(0.5)O_(4) high-entropy oxide with high capacity and ultra-long life for Li-ion battery anodes

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Journal of Advanced Ceramics 2023年第1期12卷 59-71页

作者： Shun LI Zhijian PENG Xiuli FU State Key Laboratory of Information Photonics and Optical Communications School of Integrated CircuitsBeijing University of Posts and TelecommunicationsBeijing 100876China School of Science China University of GeosciencesBeijing 100083China

Owing to the robust Li-ion storage properties induced by entropy stabilization effect,transition metal(TM)-based high-entropy oxides(HEOs)are promising electrode materials for highperformance Li-ion batteries(LIBs).In this study,a six-component Zn_(0.5)Co_(0.5)Mn_(0.5)Fe_(0.5)Al_(0.5)Mg_(0.5)O_(4) spinel-structured HEO(denoted as 6M-HEO,where M=Zn,Co,Mn,Fe,Al,and Mg)was synthesized using a facile coprecipitation *** used as an anode of the LIBs,its stable high-entropy nanostructures exhibit high specific capacity(290 mAh·g^(−1) at a current density of 2 A·g^(−1)),ultra-long cycling stability(maintained 81%of the initial capacity after 5000 cycles),and outstanding rate *** excellent performance can be attributed to two ***,its high-entropy structure can reduce the stress caused by intercalation and avoid volume expansion of the HEO *** a result,the cyclic stability was significantly ***,owing to the unique element selection in this study,four active elements(Zn,Co,Mn,and Fe)were incorporated in inactive MgO and Al2O3 matrice after the first discharge process,which would allow such high-entropy materials to withstand the rapid shuttle of Li ions.

关键词： coprecipitation method high-entropy oxide(HEO) Li-ion batteries(LIBs) anode

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