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International Conference on Computing, Intelligence and Data Analytics, ICCIDA 2022

作者： Hussein, Ahmed T. Kivanc, Didem Abdullah, Hikmat Falih, Muntaser S. Department of Advanced Electronics and Communication Technology Istanbul Okan University Istanbul34959 Turkey Department of Information and Communication Engineering Al-Nahrain University Baghdad10072 Iraq Department of System Engineering Al-Nahrain University Baghdad10072 Iraq

ISBN: (纸本)9783031270987

Cognitive radio (CR) network is the promised paradigm to resolve the spectrum shortage and to enable the cooperation in heterogeneous wireless networks in 5G and beyond. CR mainly relays on Spectrum Sensing (SS) strategy by which the vacant spectrum portion is identified. Therefore, the sensing mechanism should be accurate as much as possible, as long as the subsequent cognition steps are mainly depended on it. In this paper, an efficient and blind SS algorithm called Deep Learning Based Spectrum Sensing (DBSS) is proposed. This algorithm utilizes the deep learning approach in SS by using Convolutional Neural Network (CNN) as a detector instead of energy thresholding. In this algorithm, the computed energies of the received samples are used as dataset to feed the optimized CNN model in both training and testing phases. The proposed algorithm is simulated by MATLAB, the simulation scenarios divided into: CNN optimization (training) and SS. The last scenario shows the detection ability of the proposed algorithm for PU under noisy environment. The simulation results show that the proposed algorithm reached high detection probability (Pd) with low sensing errors at low SNR. In addition, high recognition ability to identifying Primary User (PU) signal form noise only signal is achieved as well. Finally, the proposed algorithm is validated with respect to real spectrum data that supported by SDR in an experimental signal transmission and reception scenario. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Cognitive radio

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Facial Expression Recognition system Using DNN Accelerator with Multi-threading on FPGA

Facial Expression Recognition System Using DNN Accelerator w...

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International Symposium on Computing and Networking Workshops (CANDARW)

作者： Takuto Ando Yusuke Inoue Electrical Electronics Information Engineering Major National Institute of Technology Oita College Advanced Course Oita Japan Department of Information Engineering National Institute of Technology Oita College Oita Japan

ISBN: (数字)9798331505349

ISBN: (纸本)9798331505356

In this paper, we implement a stand-alone facial expression recognition system on an SoC FPGA with multi-threading using a Deep learning Processor Unit (DPU). The system consists of two steps: one for face detection step and one for facial expression recognition. In the previous work, the Haar Cascade detector was run on a CPU in the face detection step due to FPGA resource limitations, but this detector is less accurate for profile and variable illumination condition images. Moreover, the previous work used a dedicated circuit accelerator, so running a second DNN inference for face detection on the FPGA would require the addition of a new accelerator. As an alternative to this approach, we run the two inferences by DNN on a DPU, which is a general-purpose CNN accelerator of the systolic array type. Our method for face detection using DenseBox and facial expression recognition using CNN on the same DPU enables the efficient use of FPGA resources while maintaining a small circuit size. We also developed a multi-threading technique that improves the overall throughput while increasing the DPU utilization efficiency. With this approach, we achieved an overall system throughput of 25 FPS and a throughput per power consumption of 2.4 times.

关键词： Power demand Accuracy Image recognition Program processors Face recognition Detectors Throughput Systolic arrays Face detection Field programmable gate arrays

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Graph Optimization Based Localization Algorithm by Fusing VLP and VO 15

Graph Optimization Based Localization Algorithm by Fusing VL...

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15th IEEE International Conference on Wireless Communications and Signal Processing, WCSP 2023

作者： Guo, Minan Jia, Bowen Feng, Chunyan Zhu, Zhiyu Yang, Yang Beijing University of Posts and Telecommunications Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing100876 China China Electronics Standardization Institute Beijing100176 China Beijing University of Posts and Telecommunications Beijing Laboratory of Advanced Information Networks School of Information and Communication Engineering Beijing100876 China

ISBN: (纸本)9798350324662

Visible light positioning (VLP) has attracted considerable interest due to its high accuracy and low cost. However, VLP typically requires several light emitting diodes (LEDs) for positioning, which may lead to positioning failure in sparse LED layout or parts of the links are blocked. To address this challenge, we propose a novel graph optimization-based localization algorithm by fusing VLP and visual odometry (VO), termed GO-VLO. In the considered model, a few LEDs are deployed on the ceiling and broadcast positioning information, while a receiver equipped with a camera conducts GO-VLO to achieve precise positioning with limited LEDs. GO-VLO consists of a front end to process positioning information and a back end to further optimize the positioning results. In particular, VLP and VO are first used separately at the front end, thus obtaining two respective positioning results. Then, a visible-light visual odometry fusion mechanism is proposed to fuse the positioning results of VLP and VO preliminarily. To strengthen the constraints between frames and prevent location failure when VLP is unavailable, a novel graph optimization framework is further proposed in the back end, which notably takes the covisible feature points of two successive frames into consideration. Experimental results show that our proposed method attains a positioning accuracy of 4.93 cm in two dimension and 6.20 cm in three dimension under dense LED layout. © 2023 IEEE.

关键词： pose graph SLAM visible light positioning visual positioning

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Port-controllable routing of orbital angular momentum modes using a rotatable diffractive neural network

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Science China(Physics,Mechanics & Astronomy) 2025年第6期Mechanics & Astronomy) .卷 158-167页

作者： Junmin Liu Jiafu Chen Qingji Zeng Zemin Liang Xinping Wu Xin Zhao Jiangnan Xiao Huapeng Ye Ze Dong Dianyuan Fan Shuqing Chen Institute of Microscale Optoelectronics Shenzhen University College of New Materials and New Energies Shenzhen Technology University Terahertz Technology Innovation Research Institute Shanghai Key Laboratory of Modern Optical System Terahertz Science Cooperative Innovation Center School of Optical-Electrical Computer Engineering University of Shanghai for Science and Technology Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays South China Academy of Advanced Optoelectronics South China Normal University School of Information and Electronics Beijing Institute of Technology

Orbital angular momentum(OAM) modes provide an additional orthogonal physical dimension, offering transformative potential for enhancing optical communication capacity. Despite significant progress in mode multiplexing, the development of robust communication networks faces persistent challenges, particularly in effectively routing and controlling these multiplexed channels among network nodes. To tackle these dilemmas, we propose a rotatable diffractive neural network(R-DNN) strategy and demonstrate its capability for port-controllable OAM mode routing. By leveraging the correlation between the orthogonal evolution of OAM modes in free space and phase modulations during propagation, the R-DNN precisely shapes the spatial evolution of mode fields through multiple rotatable phase layers, enabling efficient routing to specific output ports. This approach exploits the interaction of secondary wavelets with the relative states of the rotatable layers, allowing on-demand control of mode evolution paths and enhancing routing flexibility. As a proof of concept, we developed a tri-functional router that successfully directs three OAM modes to individually controllable output ports. This router achieves an average intermode crosstalk of less than-16.4 dB across three functional states, one-dimensional, two-dimensional, and cross-connected switching, while supporting the routing of 5.85 Tbit/s quadrature phase-shift keying signals. These results highlight the R-DNN's effectiveness in achieving precise and controllable OAM mode manipulation, paving the way for advanced applications in mode-multiplexed communication networks and beyond.

关键词： orbital angular momentum mode mode routing diffractive neural network

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MmWave extra-large-scale MIMO based active user detection and channel estimation for high-speed railway communications

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High-Speed Railway 2023年第1期1卷 31-36页

作者： Anwen Liao Ruiqi Wang Yikun Mei Ziwei Wan Shicong Liu Zhen Gao Hua Wang Hao Yin Nanjing Research Institute of Electronics Technology Nanjing 210039China School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China Advanced Research Insttute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Insttute of China Electronic System Engineering Corporation Beijing 100141China

The current High-Speed Railway(HSR)communications increasingly fail to satisfy the massive access services of numerous user equipment brought by the increasing number of people traveling by *** this end,this paper investigates millimeter-Wave(mmWave)extra-large scale(XL)-MIMO-based massive Internet-of-Things(loT)access in near-field HSR communications,and proposes a block simultaneous orthogonal matching pursuit(B-SOMP)-based Active User Detection(AUD)and Channel Estimation(CE)scheme by exploiting the spatial block sparsity of the XLMIMO-based massive access ***,we first model the uplink mmWave XL-MIMO channels,which exhibit the near-field propagation characteristics of electromagnetic signals and the spatial non-stationarity of mmWave XL-MIMO *** exploiting the spatial block sparsity and common frequency-domain sparsity pattern of massive access channels,the joint AUD and CE problem can be then formulated as a Multiple Measurement Vectors Compressive Sensing(MIMV-CS)*** on the designed sensing matrix,a B-SOMP algorithm is proposed to achieve joint AUD and ***,simulation results show that the proposed solution can obtain a better AUD and CE performance than the conventional CS-based scheme for massive IoT access in near-field HSR communications.

关键词： High-speed railway communications Massive access Activeuser detection Channel estimation Millimeter-wave extra-large scale MIMO Near-field spatial non-stationarity

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Nanoscale phase management of the 2D/3D heterostructure toward efficient perovskite solar cells

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Science Bulletin 2024年第18期69卷 2853-2861页

作者： Hao Gu Annan Zhu Junmin Xia Wang Li Jiahao Zheng Tao Yang Shengwen Li Nan Zhang Shiliang Mei Yongqing Cai Shi Chen Chao Liang Guichuan Xing Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacao 999078China State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of PhysicsNational Innovation Platform(Center)for Industry-Education Integration of Energy Storage TechnologyXi’an Jiaotong UniversityXi’an 710049China Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic SystemsHarbin Institute of TechnologyShenzhen 518055China Institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China

The stabilization of the formamidinium lead iodide(FAPbI_(3))structure is pivotal for the development of efficient photovoltaic *** two-dimensional(2D)layers to passivate the threedimensional(3D)perovskite is essential for maintaining the a-phase of FAPbI_(3) and enhancing the power conversion efficiency(PCE)of perovskite solar cells(PSCs).However,the role of bulky ligands in the phase management of 2D perovskites,crucial for the stabilization of FAPbI_(3),has not yet been *** this study,we synthesized nanoscale 2D perovskite capping crusts with=1 and 2 Ruddlesden-Popper(RP)perovskite layers,respectively,which form a type-Ⅱ 2D/3D *** heterostructure stabilizes the a-phase of FAPbI_(3),and facilitates ultrafast carrier extraction from the 3D perovskite network to transport contact *** introduced tri-fluorinated ligands to mitigate defects caused by the halide vacancies and uncoordinated Pb^(2+)ions,thereby reducing nonradiative carrier recombination and extending carrier *** films produced were incorporated into PSCs that not only achieved a PCE of 25.39%but also maintained 95%of their initial efficiency after 2000 h of continuous light exposure without *** findings underscore the effectiveness of a phase-pure 2D/3D heterostructure-terminated film in inhibiting phase transitions passivating the iodide anion vacancy defects,facilitating the charge carrier extraction,and boosting the performance of optoelectronic devices.

关键词： Phase-pure 2D perovskite 2D/3D heterostructure Type-II energy alignment Carrier dynamic FAPbI_(3)

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Theoretical Investigation of Single-Qubit Hadamard Gate

Theoretical Investigation of Single-Qubit Hadamard Gate

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Interdisciplinary Approaches in Technology and Management for Social Innovation (IATMSI), IEEE Conference on

作者： Sapna Tiwari Gaurav Kumar Bharti Mayur Kumar Chhipa Department of Electronics and Communication Engineering Advanced Photonics and Cyber Physical System Lab Indian Institute of Information Technology Bhopal India OdeL & Electronics and Communication Engineering Programmes ISBAT University Kampala Uganda

ISBN: (数字)9798331521691

ISBN: (纸本)9798331521707

Quantum logic gates serve as essential components in quantum computing and communication systems. Literatures highlights the two-state quantum Hadamard gates using various optical techniques. The paper presents an innovative method for developing a quantum-bit Hadamard gate utilizing light's phase encoding approach. The research focuses on the implementation of a silicon nitride-based racetrack configured ring resonator based on polarization rotation phenomena. The Hadamard gate is observed at the resonance wavelength of 1529.5 nm by adjusting the azimuth and elliptical angle of the input polarized light. The proposed polarization-driven Hadamard quantum gate has been confirmed through Jones matrix analysis and numerical simulations.

关键词： Technological innovation Optical polarization Qubit Quantum mechanics Photonic integrated circuits Logic gates Silicon Resonance Optical ring resonators Integrated circuit modeling

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Accurate MTPA Control Based on Ferrari Method for IPMSM with Partial Derivative Term Calculation 27

Accurate MTPA Control Based on Ferrari Method for IPMSM with...

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27th International Conference on Electrical Machines and systems, ICEMS 2024

作者： Li, Yiyang Gu, Xin Wang, Zhiqiang Guo, Liyan Chen, Wei Li, Xinmin Li, Chen School of Electronics and Information Engineering Tiangong University Tianjin China School of Electrical Engineering Tiangong University Tianjin China Tianjin Key Laboratory of Intelligent Control of Electrical Equipment Tianjin China National Local Joint Engineering Research Center of Electrical Machine System Design and Manufacturing China Zhejiang University Advanced Electrical Equipment Innovation Center Hangzhou China

ISBN: (纸本)9784886864406

Even if the exact motor parameters are known, the MTPA strategy cannot obtain precise maximum torque per ampere (MTPA) points under large current amplitude because the partial derivative of inductance to current is ignored in the modeling process. In view of this, the MTPA mathematical model considering the partial derivative of inductance to current is established in this paper, and the MTPA point tracking error caused by ignoring the partial derivative in the modeling process based on Ferrari method is analyzed. Then, an offline-online combined method for calculating the partial derivative term is proposed to compensate the MTPA tracking error. On this basis, an MTPA control strategy based on Ferrari method considering the partial derivative of inductance to current is proposed. Experiment to verify the feasibility and effectiveness of the proposed method. © 2024 The Institute of Electrical Engineers of Japan.

关键词： Permanent magnets

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Computer-Assisted Quantitative Framework for Whole Slide Cervical Image Grading Driven by Time Series Features

SSRN

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SSRN 2023年

作者： Zhang, Chuanwang Jia, Dongyao Li, Ziqi Wu, Nengkai He, Zihao Institute of Advanced Control System School of Electronics and Information Engineering Beijing Jiaotong University Beijing100044 China

While thinprep cytologic test is the most commonly applied diagnosis approaches for cervical cancer, current detection results highly depend on specific category of cervical cells screened by cytotechnicians on the slides using optical microscopes, which lack robustness. In this paper, we proposed a time series based two-stage quantitative detection framework in whole slide cervical images that could be applied by pathologists to generate lesion grades on smear-level effectively. We designed a You Only Look Once network combined with attention module and integrated it with the multi-scale feature fusion to refine the representations and classify the cervical cells more accurately (precision of 0.8647 and true positive rate of 95.8%). We presented a quantitative description of DNA contents and combined it with Matthew effect to rectify their contributions to final diagnosis, which provides a clearer quantitative standard for the degree of cell proliferation. We extracted the time series features and generated the final grading results, and explained how we benefit from this framework to obtain a model which fully utilizes the global smear information, enhances the detection robustness, supplies the existing cervical screening system and is not easily influenced by the false classification of cervical cells (accuracy, sensitivity, and specificity of 0.9193, 0.9285, 0.9234 on smear-level). We clearly presented and expatiated the concepts of time series features in cervical cancer detection, and ensured that global information of each smear will be efficiently mined for final screening. Finally, we evaluated our solution on two real clinical slide datasets, highlighting the inner relationship between time series features and physiological states of patients, adapting it to be as easily integrated in current diagnosis system as possible, enriching existing detection principles and achieving a comparable cervical intraepithelial neoplasia grading accuracy to that of a pro

关键词： Grading

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Measurement of Absorption Current of Polyester Coated Enameled Wires with Q(t) meter

Measurement of Absorption Current of Polyester Coated Enamel...

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2023 International Symposium on Electrical Insulating Materials, ISEIM 2023

作者： Watanabe, Akinao Fukuma, Masumi Sekiguchi, Yoitsu Advanced Electronic and Information Systems Course National Institute of Technology Matsue College Matsue Japan Department of Electrical Engineering and Computer Science National Institute of Technology Matsue College Matsue Japan Energy and Electronics Materials R&D Laboratories Sumitomo Electric Industries Osaka Japan

ISBN: (纸本)9784886864376

A Q(t) meter is used to measure electrical properties in insulating materials. Here, Q(t) is the integral value of circuit current with time t. It is possible to measure the Q(t) of the insulation material of a capacitor and a cable by using Q(t) meter. The current through an insulating material is divided into an instantaneous charging current, an absorption current and an equilibrium leakage current. It is considered that the absorption current is related to charge accumulation in the insulating materials. In this paper, an enameled wire (1.6 PEW) is used to prepare a cable sample, the Q(t) of the coated polyester (PEs) is measured, and extraction of absorption current components from measured Q(t) are reported. © 2023 The Institute of Electrical Engineers of Japan.

关键词： Insulating materials

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