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Utilizing Two-Dimensional Perovskite in a TFBG Humidity Sensor for Improved Soil Moisture Detection

Utilizing Two-Dimensional Perovskite in a TFBG Humidity Sens...

2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Wang, Xiaoniu Gao, Feng Yang, Yi Shen, Changyu College of Optical and Electronic Technology China Jiliang University Hangzhou310018 China Information Photonics Research Center Fujian Normal University Fuzhou350117 China

This study proposes a reflective, TFBG based soil content sensor enabled by a two-dimensional halide perovskite material (PMA)2PbBr4). The sensor exhibits a linear response when the soil moisture content ranging from ... 详细信息

ISBN: (纸本)9798350312614

关键词： humidity sensor tilted fiber bragg grating two-dimensional perovskite

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A Piano Learning System Constructed Based on Multi-Direction Videos and Hand Landmark Detection 5

A Piano Learning System Constructed Based on Multi-Direction...

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5th International Conference on Computer Science, Engineering, and Education, CSEE 2024

作者： Shi, Wei Okada, Yoshihiro Ikeda, Daisuke Pan, Yu Kyushu University Research Institute for Information Technology Fukuoka Japan Kyushu University Innovation Center for Educational Resources Fukuoka Japan Kyushu University Faculty of Information Science and Electrical Engineering Fukuoka Japan Baicheng Normal University College of Physics and Electronic Information Baicheng China

ISBN: (纸本)9798350376852

During the Covid-19 pandemic, e-learning and online learning systems and platforms have become increasingly popular and essential. Currently, numerous e-learning materials covering various subjects have been developed and are widely utilized in practical education. Music instruction education has also confronted this challenge. In this paper, we introduce a piano learning system. We incorporate multi-directional video technology to enable users to observe piano players from their desired angles. Additionally, we integrate MediaPipe into this system to implement hand landmark detection, facilitating users in virtual piano playing. We also use an experiment to evaluate the educational efforts of our system. © 2024 IEEE.

关键词： Learning systems

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Microfluidic impedance flow cytometer leveraging virtual constriction microchannel and its application in leukocyte differential

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Microsystems & Nanoengineering 2024年第6期10卷 493-503页

作者： Minruihong Wang Jie Zhang Xiao Chen Yimin Li Xukun Huang Junbo Wang Yueying Li Xiaoye Huo Jian Chen State Key Laboratory of Transducer Technology Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100190People’s Republic of China School of Future Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China CAS Key Laboratory of Genomic and Precision Medicine Collaborative Innovation Center of Genetics and DevelopmentBeijing Institute of GenomicsChinese Academy of SciencesBeijing 100101People’s Republic of China China National Center for Bioinformation Beijing 100101People’s Republic of China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049People’s Republic of China

Microfluidic impedance flow cytometry has been widely used in leukocyte differential and counting,but it faces a bottleneck due to the trade-off between impedance detection throughput and *** this study,a microfluidic impedance flow cytometer based on a virtual constriction microchannel was reported,in which the virtual constriction microchannel was constructed by crossflow of conductive sample and insulated sheath fluids with underneath micro-electrodes for impedance *** to conventional mechanical constriction microchannels,this virtual counterpart could effectively avoid direct physical contact between cells and the microchannel walls to maintain high throughputs,and significantly reduce the volume of the impedance detection region for sensitivity *** the developed microfluidic impedance flow cytometer,impedance pulses of three leukemia cell lines,K562,Jurkat,and HL-60,were detected,achieving a 99.8%differentiation accuracy through the use of a recurrent neural ***,impedance pulses of four white blood cell subpopulations(neutrophils,eosinophils,monocytes,and lymphocytes)from three donors were detected,achieving a classification accuracy of≥99.2%.A classification network model was established based on purified white blood cell and applied to impedance pulses of two white blood cell mixtures,resulting in proportional distributions of four leukocyte subpopulations within theoretical *** results indicated that the developed microfluidic impedance flow cytometer based on the virtual constriction microchannel could achieve both high detection throughput and high sensitivity,showing great potentials for clinical diagnostics and blood analysis.

关键词： fluid leukocyte impedance

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Structure and thermoelectric properties of half-Heusler-like TiFeCu_(x)Sb alloys

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Journal of Materiomics 2024年第3期10卷 523-530页

作者： Siyuanyang Yin Qizhu Li Shaoqin Wang Jiajun Chen Zirui Dong Yubo Zhang Binghui Ge Jiye Zhang Jun Luo School of Materials Science and Engineering Shanghai University99 Shangda RoadShanghai200444China Institutes of Physical Science and Information Technology Anhui University111 Jiulong RoadHefei230601China Minjiang Collaborative Center for Theoretical Physics College of Physics and Electronic Information EngineeringMinjiang University200 Xiyuangong RoadFuzhou350108China Interdisciplinary Materials Research Center School of Materials Science and EngineeringTongji University4800 Caoan RoadShanghai201804China

Previous research on the ternary Ti-Fe-Sb system has revealed that stoichiometric TiFeSb cannot exist as a stable compound,whereas a single-phase TiFe_(1.33)Sb alloy with the half-Heusler-like structure has been synthesized by adding excessive *** this work,we report that TiFeSb can also be stabilized by filling additional Cu to the vacant 4d site of the half-Heusler *** experiments indicate that the TiFe-Cu_(x)Sb(x=0-0.25)samples exhibit a p-type conduction with extremely high carrier concentration((0.5-2.5)×10^(22)cm^(-3)),while these samples attain very large Seebeck coefficients,over 100 mV/K in the whole measured temperature range for the samples with x=*** addition,a logarithmic divergence of the temperature-dependent specific heat capacity(CP/T)is observed at low temperatures,implying the strange-metal behavior of TiFeCu_(x)Sb *** partial filling of the vacant 4d site results in significantly reduced lattice thermal conductivity,leading to the low total thermal conductivity of 2.8 W·m^(-1)·K^(-1)at 823 K for the TiFeCu_(0.20)Sb ***,a dimensionless figure of merit zT of 0.54 at 923 K is realized for TiFeCu_(0.20)Sb,demonstrating that promising thermoelectric materials with intriguing physical properties can be discovered in the composition gap of half-and full-Heusler alloys.

关键词： TiFeSb Thermoelectric materials Heusler alloys Vacancy-filled

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Utility Maximization in Satellite Networks Using Onboard Caching 4

Utility Maximization in Satellite Networks Using Onboard Cac...

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4th information Communication Technologies Conference, ICTC 2023

作者： Wu, Hao Yan, Jian Kuang, Linling Tsinghua University Department of Electronic Engineering Beijing10084 China Tsinghua University Beijing National Research Center for Information Science and Technology Beijing10084 China

ISBN: (纸本)9781665462587

The predictable mobility of satellites enables a store-carry-forward paradigm for flows tolerant of long delivery time. Compared to end-to-end direct transmission, this paradigm has less inter-satellite link usage. Using onboard caches to store and carry flows, we propose a time-expanded graph (TEG)-based traffic engineering (TE) scheme. We use a conventional resource allocation algorithm for single-epoch network utility maximization. Then, we propose a load-and-delay-aware path selection (LDAPS) method to control multi-epoch resource contention and improve long-term network utility. Simulation of an actual satellite system reveals that our scheme achieves higher long-term network utility than existing non-caching TE methods. Under the same cache size, LDAPS has better performance than the shortest path strategy. © 2023 IEEE.

关键词： Satellites

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Multi-Beam Design for Near-Field Extremely Large-Scale RIS-Aided Wireless Communications

Multi-Beam Design for Near-Field Extremely Large-Scale RIS-A...

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作者： Shen, Decai Dai, Linglong Su, Xin Suo, Shiqiang Tsinghua University Department of Electronic Engineering The Beijing National Research Center for Information Science and Technology Beijing100084 China CICT Mobile Communication Technology Company Ltd. Innovation Center Beijing100084 China

As the energy-saving array composed of passive elements, reconfigurable intelligent surface (RIS) will evolve to the extremely large-scale RIS (XL-RIS) to overcome serious path loss. This change leads to the near-field propagation becoming dominant. There are some works to explore the near-field beam design via beam training. Unfortunately, due to the constant modulus constraint for XL-RIS, most of works in the near-field scenario focus on single-beam design. For massive connectivity requirement scenario, these works will face a serious loss of beam gains, resulting in a decrease in transmission rate. To solve this problem, we propose a block coordinate descent-based scheme with majorization-minimization (MM) algorithm for multi-beam design. The proposed scheme handles constant modulus constraint from two aspects. Firstly, under this constraint, the multi-beam design is an intractable non-convex quadratic programming problem. We utilize MM algorithm to solve this problem as several iterative sub-problems which are easily to be solved. Secondly, the solution space for multi-beam optimization is confined to a limited space due to this constraint, so we introduce the phases for beam gains as an extra optimizable variable to enrich the degree of freedom for optimization. Simulation results show that the proposed scheme could achieve a superior rate 50% higher than the existing schemes. © 2017 IEEE.

关键词： Degrees of freedom (mechanics)

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Flow calibration system test based on critical flow Venturi nozzle array

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Hangkong Dongli Xuebao/Journal of Aerospace Power 2025年第7期40卷

作者： Zhao, Jiaxi Zhang, Zhihao Wu, Songling Qin, Chen Zhang, Rongping Key Laboratory of Aerodynamic Noise Control China Aerodynamics Research and Development Center Sichuan Mianyang621000 China School of Information Engineering Southwest University of Science and Technology Sichuan Mianyang621010 China

In order to improve the accuracy of wind tunnel test，a secondary flow standard device based on critical flow Venturi nozzle array was developed based on the high-pressure air source of China Aerodynamics research and development center. The designed calibration pressure range was 1—6 MPa，and the flow range was 0.2—5.55 kg/s. The calibration device was composed of gas supply system，standard critical flow Venturi nozzle array and measurement system. The standard critical flow Venturi nozzles were traced to the pVTt method flow standard device of the National Institute of Metrology. The stability of the gas supply system，the temperature field inside the pipeline，and the repeatability of the discharge coefficient were experimentally studied. In addition，the uncertainty of the discharge coefficient was analyzed. The experimental results indicated that the gas supply system of the standard device had good stability. The uniformity of temperature distribution inside the pipeline increased with the increase of flow rate. The measurement repeatability of the discharge coefficient was within 0.04%，and the extended uncertainty (coverage factor k=2) was less than 0.15%. © 2025 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

关键词： Airships

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A Noise Performance Optimization Method for SBS-Based Optical Spectrum Analyzer

A Noise Performance Optimization Method for SBS-Based Optica...

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2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Liang, Zi Ke, Changjian Zhang, Yuming Lv, Yanjun Liu, Deming School of Optical and Electronic Information& National Engineering Research Center of Next Generation Internet Access-system Huazhong University of Science and Technology Wuhan China

A noise performance optimization method for SBS-based OSA is proposed and experimentally proved. By adjusting the working state of the spectrometer system, the optimized sensitivity can be reduced by ∼5dB. © 202... 详细信息

ISBN: (纸本)9798350312614

关键词： dual-stage structure noise performance optimization SBS sensitivity

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A Robust Key Exchange and Tamper-Resistant Protocol for HAN and NAN Networks in Smart Grids

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IEEE Internet of Things Journal 2025年第12期12卷 21394-21403页

作者： Ayub, Muhammad Faizan Li, Xiong Mahmood, Khalid Shamshad, Salman Das, Ashok Kumar Wang, Guijuan University of Electronic Science and Technology of China School of Computer Science and Engineering Sichuan Chengdu611731 China National Yunlin University of Science and Technology Graduate School of Intelligent Data Science Yunlin Douliu64002 Taiwan The University of Lahore Department of Software Engineering Lahore54590 Pakistan International Institute of Information Technology Center for Security Theory and Algorithmic Research Hyderabad500 032 India Korea University College of Informatics Department of Computer Science and Engineering Anam-ro Seoul145 Korea Republic of Qilu University of Technology Shandong Academy of Sciences Key Laboratory of Computing Power Network and Information Security Ministry of Education Shandong Computer Science Center Jinan250353 China Shandong Fundamental Research Center for Computer Science Shandong Provincial Key Laboratory of Industrial Network and Information System Security Jinan250353 China

Smart Grids (SG) rely on Home Area Networks (HAN) and Neighborhood Area Networks (NAN) to ensure efficient power distribution, real-time monitoring, and seamless communication between smart devices. Despite these advantages, the use of public communication channels in HAN and NAN networks introduces critical challenges, such as vulnerability to impersonation, physical tampering, and scalability issues in resource-constrained environments. These issues compromise the stability, reliability, and security of SG environments. Existing protocols often fail to adequately address these challenges, particularly in ensuring resistance to physical tampering of supply lines and impersonation attacks. Additionally, they struggle to minimize the computation, communication, and energy costs associated with securing a resource-constrained SG environment. Therefore, we propose a robust key exchange and tamper-resistant protocol for HAN and NAN networks to address these limitations. The proposed protocol leverages the Physical Unclonable Function (PUF) mechanism to offer physical tampering resistance to smart meters. We validate our protocol formally using the Random or Real (RoR) model, which confirms its security robustness. Additionally, our informal security analysis highlights the protocol's resilience against impersonation, physical tampering attacks, etc. We analyze and compare the performance of the proposed protocol, which further demonstrates our protocol's effectiveness and security compared to competing protocols. Moreover, the proposed protocol achieves resource efficiency with 45.99% and 58.85% substantial reductions in computation overhead and energy overhead, respectively, compared to competing protocols. These results showcase the protocol's enhanced security and practicality for resource-constrained SG environments. © 2014 IEEE.

关键词： Authentication Protocol

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Provably Secure Efficient Key-Exchange Protocol for Intelligent Supply Line Surveillance in Smart Grids

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IEEE Internet of Things Journal 2025年第12期12卷 21784-21792页

作者： Ayub, Muhammad Faizan Li, Xiong Mahmood, Khalid Alenazi, Mohammed J.F. Das, Ashok Kumar Wang, Guijuan University of Electronic Science and Technology of China School of Computer Science and Engineering Sichuan Chengdu12599 China National Yunlin University of Science and Technology Graduate School of Intelligent Data Science Yunlin Douliu64002 Taiwan Department of Computer Engineering Riyadh11451 Saudi Arabia International Institute of Information Technology Center for Security Theory and Algorithmic Research Hyderabad500 032 India Korea University College of Informatics Department of Computer Science and Engineering Anam-ro Seoul145 Korea Republic of Ministry of Education Shandong Computer Science Center Qilu University of Technology Shandong Academy of Sciences Key Laboratory of Computing Power Network and Information Security Jinan250353 China Shandong Provincial Key Laboratory of Industrial Network and Information System Security China Shandong Fundamental Research Center for Computer Science Jinan 250353 China

Intelligent supply line surveillance is critical for modern smart grids. Smart sensors and gateway nodes are strategically deployed along supply lines to achieve intelligent surveillance. They collect data continuously and transmit it to the control centre in real-time. It enables real-time monitoring, fault detection, and efficient energy management across distribution networks. This advanced surveillance system ensures continuous monitoring of supply lines, detecting anomalies, and optimizing operations to maintain the stability and reliability of the smart grid. However, the reliance of all participating nodes on public communication channels to transmit supply line surveillance data exposes these systems to critical cyber attacks. These cyber attacks include impersonation, physical tampering, ephemeral secret leakage, and desynchronization attacks. To address these issues, existing key-exchange protocols often fail to ensure robust security while imposing high computation and communication overheads, limiting their practicality for resource-constrained environments. Therefore, we propose a secure and efficient key exchange and tamper-resistant authentication protocol using Elliptic Curve Cryptography (ECC) and Physical Unclonable Functions (PUFs). The PUF mechanism provides robust resistance against physical tampering and cloning attacks, ensuring enhanced physical security for supply line devices. We validate the security robustness of the devised protocol using the Random or Real (ROR) model. Furthermore, informal security analysis demonstrates the protocol's robustness in rigorously resisting various attacks, including physical tampering, impersonation, ephemeral secret leakage and desynchronization. Moreover, we determine the performance evaluation that reveals the protocol's superior efficiency compared to competing protocols, achieving significant reductions of 28.64% in computation overhead and 9.96% in communication overhead. © 2014 IEEE.

关键词： Authentication Protocol

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