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13th Asia-Pacific International Symposium on Electromagnetic Compatibility and Technical Exhibition, APEMC 2022

作者： Chen, Quankun Li, Da Tao, Tuomin Ma, Hanzhi Li, Erping Zhejiang University The Zhejiang Key Lab. of Advanced Micro/Nano Electronic Devices Smart Systems and Applications Hangzhou China

ISBN: (数字)9781665416719

ISBN: (纸本)9781665416719

Spike neural networks (SNNs) have gained growing attention, and the temporal encoding methods for the signal input are also crucial. Among these encoding algorithms, a suitable and simple encoding method not only affects the performance of the SNNs but also relates to the expansion in hardware. Several high-performance and easily realized encoding algorithms are discussed in this paper. © 2022 IEEE.

关键词： Network coding

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Coupling Path Identification of Conducted EMI in a High-Voltage Discharging Circuit Using Near-Field Scanning 15

Coupling Path Identification of Conducted EMI in a High-Volt...

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15th International Conference on microwave and Millimeter Wave Technology, ICMMT 2023

作者： Xie, Yu-Ting Zhang, Ling Chen, Jun-Hui Li, Da Yang, Zhen-Zhong Li, Er-Ping Zhejiang University The Zhejiang Key Lab. of Advanced Micro/Nano Electronic Devices Smart Systems and Applications College of Information Science and Electronic Engineering Hangzhou China China Academy of Engineering Physics Institute of Electronic Engineering Mianyang China

ISBN: (纸本)9798350338874

Electromagnetic interference (EMI) problems are common and can severely affect the normal function of high-voltage discharge circuits. This paper investigates the EMI issue in a dual-channel high-voltage discharge system, where the high-voltage discharging current of one circuit causes the false triggering of the other low-voltage triggering circuit. To effectively analyze the EMI coupling path, the near-field scanning (NFS) technique is adopted to capture and visualize the current flow path in the discharging process. A useful subtraction method is proposed to eliminate the radiated EMI from the high-voltage discharging current and better visualize the conducted EMI current. According to the NFS results after the subtraction process, the conducted EMI current coupling path can be straightforwardly obtained, and the corresponding mitigation approaches are demonstrated to solve the EMI problem effectively. © 2023 IEEE.

关键词： Timing circuits

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Fabrication-Constrained Conjugate Adjoint Gradient Inverse Design for Large-Scale Aperiodic Frequency Selective Surface

Fabrication-Constrained Conjugate Adjoint Gradient Inverse D...

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2023 International Applied Computational Electromagnetics Society Symposium, ACES-China 2023

作者： Zhu, Enze Li, Erji Wei, Zhun Yin, Wen-Yan Wang, Qian Innovative Institute of Electromagnetic Information and Electronic Integration Zhejiang University Key Lab of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang Province Hangzhou China Avic Research Institute for Special Structures of Aeronautical Composites Aeronautical Science Key Lab for High Performance Electromagnetic Windows Jinan China

ISBN: (纸本)9781733509657

In this paper, a fabrication-constrained conjugate adjoint gradient inverse design method (FCAG-IDM) is proposed to optimize the structural parameters of large-scale aperiodic frequency selective surfaces (FSSs). A characteristic of the proposed FCAG-IDM is that it constrains the optimized variables in each iteration considering the fabrication precision. The main advantage of FCAG-IDM is to achieve a fast inverse design for the scattering performance of electrically large-scale structure by combining fast forward simulator, conjugate adjoint gradient descent, and fabrication-constraint. The proposed FCAG-IDM is validated by both numerical and experimental results. © 2023 Applied Computational Electromagnetics Society (ACES).

关键词： Fabrication

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Chalcogenide integrated nanophotonics and its potential for quantum photonics

Chalcogenide integrated nanophotonics and its potential for ...

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2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and Optical Communications, IPOC 2024

作者： Lei, Kunhao Xu, Kai Bao, Kangjian Weng, Jiawei Li, Lan Lin, Hongtao The State Key Lab of Brain-Machine Intelligence Key Laboratory of Micro-Nano Electronics and Smart System of Zhejiang Province College of Information Science and Electronic Engineering Zhejiang University Hangzhou310027 China The Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of Engineering Westlake University Zhejiang Hangzhou310030 China Institute of Advanced Technology Westlake Institute for Advanced Study Zhejiang Hangzhou310024 China

Due to the high optical nonlinearity and nonvolatile phase-changing properties, chalcogenide integrated nanophotonics are emerging for entangling photon generation and nonvolatile quantum states operation. We will rev... 详细信息

ISBN: (纸本)9798350379266

关键词： Silicon photonics

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A Novel Four-Port Calibration Method for High Frequency On-Wafer S-parameter Measurement 15

A Novel Four-Port Calibration Method for High Frequency On-W...

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15th International Conference on microwave and Millimeter Wave Technology, ICMMT 2023

作者： Zhou, Jiefeng Zhang, Ling Chen, Junhui Li, Da Zhou, Ding Li, Er-Ping Zhejiang University College of Information Science and Electronic Engineering The Zhejiang Key Lab. of Advanced Micro/Nano Electronic Devices Smart Systems and Applications Hangzhou China High-Speed and High-Frequency Lab Huawei Technologies Co. Ltd Dongguan China

ISBN: (纸本)9798350338874

This paper proposes a novel four-port calibration method for on-wafer S-parameter measurement. Crosstalk terms can seriously deteriorate the measurement accuracy of high-frequency on-wafer systems. The proposed method can consider all error and crosstalk terms in on-wafer measurement using two ground-signal-signal-ground (GSSG) probes and ensure high calibration accuracy. Only six calibration standards are required to complete the four-port calibration by this method. The proposed method is verified by full-wave simulations up to 100 GHz. The simulation and calibration results are in great agreement, which proves the correctness and reliability of the proposed method. © 2023 IEEE.

关键词： Calibration

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Rapid Detection Technology for Cocaine and Methamphetamine Acute Abuse based on EEG

Rapid Detection Technology for Cocaine and Methamphetamine A...

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2024 International Conference on Next Generation electronics and Photonics, INGEP 2024

作者： Xia, Jie Yuan, Hongwen Pan, Jiadong Li, Kan Zhang, Luxi Dong, Shurong Key Lab. of Advanced Micro/Nano Electronic Devices and Smart Systems of Zhejiang College of Information Science and Electronic Engineering Zhejiang University Hangzhou310027 China HangZhou City University Sports and Aesthetic Education Department Hangzhou310015 China Shanghai Institute of Satellite Engineering shanghai200240 China

Multi-domain characterization and a new fast detection method for acute illegal psychostimulants abuse detection based on waking-state EEG of mice is proposed in this paper. To get corftical electroencephalogram (EEG), three groups of mice were injected with cocaine (Coca), methamphetamine (Meth), and saline (Sali) respectively following the experimental paradigm of drug abuse. The EEG features were extracted out by multi-domain views, including time, frequency, complexity, dynamics, and independent domains to obtain acute drug abuse effects on the brain. New strategy combing time domain with frequency domain is developed as multi-domain input and by means of dimension transformation approach preserving temporal information, the performance of drug abuse detection is greatly improved with deep learning models of ResNet50. Results show that comparing to support vector machine (SVM), k nearest neighbor (kNN), random forest (RF), and long short-term memory fully convolutional networks (LSTM-FCN), Res-Net50 based on our proposed multi-domain features has best F1-score of 95.10%. This promising method provides a low-cost, fast, and widely assisted technology for psychostimulants abuse identification. © Published under licence by IOP Publishing Ltd.

关键词： Decision trees

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Modeling and Analysis of a Large-Scale Memristor Crossbar Array for Neuromorphic Chip 9

Modeling and Analysis of a Large-Scale Memristor Crossbar Ar...

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9th IEEE International Symposium on microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, MAPE 2022

作者： Fang, Lidan Li, Yan Li, Erping China Jiliang University Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province Zhejiang China Key Laboratory of Advanced Micro-Nano Electronic Devices & Smart Systems and Applications Zhejiang China

ISBN: (数字)9781665427753

ISBN: (纸本)9781665427753

This paper presents a complete equivalent circuit model of a large memristor crossbar array, including parasitic capacitance, inductance, and resistance. By changing the rise time of the input signal and monitoring the output voltage of different output ports, signal integrity (SI) problems such as crosstalk, and IR voltage drop in the memristor crossbar array are analyzed. The simulation results show that with the decrease of the rise time, the electromagnetic effect will become obvious, which will lead to the crosstalk ripple and distortion of the output signal becoming serious. And as the output port moves away from the input, the IR voltage drop increases with the increase of the coupling elements. This will point the direction for improving the performance of memristor crossbar arrays. Furthermore, different from conventional signals, we propose to simulate spiking signals using the Izhikevich neuron model for more accurate analysis. © 2022 IEEE.

关键词： Memristors

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A knowledge-inherited learning for intelligent metasurface design and assembly

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Light(Science & Applications) 2023年第4期12卷 680-690页

作者： Yuetian Jia Chao Qian Zhixiang Fan Tong Cai Er-Ping Li Hongsheng Chen ZJU-UIUC Institute Interdisciplinary Center for Quantum InformationState Key Laboratory of Extreme Photonics and InstrumentationZhejiang UniversityHangzhou 310027China ZJU-Hangzhou Global Science and Technology Innovation Center Key Lab.of Advanced Micro/Nano Electronic Devices&Smart Systems of ZhejiangZhejiang UniversityHangzhou 310027China Jinhua Institute of Zhejiang University Zhejiang UniversityJinhua 321099China Air and Missile Defense College Air Force Engineering UniversityXi'an 710051China Shaoxing Institute of Zhejiang University zhejiang UniversityShaoxing321000China

Recent breakthroughs in deep learning have ushered in an essential tool for optics and photonics,recurring in various applications of material design,system optimization,and automation *** learning-enabled on-demand metasurface design has been the subject of extensive expansion,as it can alleviate the time-consuming,low-efficiency,and experience-orientated shortcomings in conventional numerical simulations and physics-based ***,collecting samples and training neural networks are fundamentally confined to predefined individual metamaterials and tend to fail for large problem *** by object-oriented C++programming,we propose a knowledge-inherited paradigm for multi-object and shape-unbound metasurface inverse *** inherited neural network carries knowledge from the"parent"metasurface and then is freely assembled to construct the"offspring"metasurface;such a process is as simple as building a container-type *** benchmark the paradigm by the free design of aperiodic and periodic metasurfaces,with accuracies that reach 86.7%.Furthermore,we present an intelligent origami metasurface to facilitate compatible and lightweight satellite communication *** work opens up a new avenue for automatic metasurface design and leverages the assemblability to broaden the adaptability of intelligent metadevices.

关键词： breakthrough consuming shortcomings

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Advancements in Intelligent Photonics: The Role of Silicon Photonics and Phase Change Materials in High-Efficiency Computing 15

Advancements in Intelligent Photonics: The Role of Silicon P...

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15th International Conference on Information Optics and Photonics, CIOP 2024

作者： Yun, Yiting Xu, Kai Wang, Weiquan Wei, Maoliang Li, Junying Chen, Zequn Li, Lan Lin, Hongtao The State Key Lab of Brain-Machine Intelligence Key Laboratory of Micro-Nano Electronics and Smart System of Zhejiang Province College of Information Science and Electronic Engineering Zhejiang University Zhejiang Hangzhou310027 China Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Zhejiang Hangzhou310024 China Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of Engineering Westlake University Zhejiang Hangzhou310030 China

ISBN: (数字)9781510686175

ISBN: (纸本)9781510686168

Intelligent photonics, driven by silicon photonics, is revolutionizing high-speed data processing, low-power computing, and precision sensing. Leveraging these advances, photonic chips are enabling the development of optical neural networks and nonlinear activation mapping, which are crucial for addressing the demands of large generative models. However, traditional on-chip control methods struggle with high power consumption and volatility. To overcome these challenges, phase-change materials(PCMs) offer high optical contrast and non-volatility, enhancing integration density and reducing power usage. This article discusses the performance and reversible control of PCMs and their integration with silicon photonics. By incorporating PCMs into in-memory optical computing chips, we achieved 4-bit storage and over 88% accuracy on the MNIST dataset, marking significant progress in next-generation high-performance computing. © 2024 SPIE.

关键词： Silicon photonics

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Absorptive-Material-Based Structure for Suppressing Unwanted Radiation in Chip-Packages 13

Absorptive-Material-Based Structure for Suppressing Unwanted...

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13th Asia-Pacific International Symposium on Electromagnetic Compatibility and Technical Exhibition, APEMC 2022

作者： Xing, Jiaqi Liang, Xinglei Fan, Yudi Zhang, Ling Li, Da Li, Er-Ping Zhejiang University College of Information Science & Electronic Engineering ZJU-UIUC Institute The Zhejiang Key Lab. of Advanced Micro/Nano Electronic Devices Smart Systems and Applications Hangzhou China

ISBN: (数字)9781665416719

ISBN: (纸本)9781665416719

In this paper, a double-layer structured absorptive material for solving the electromagnetic radiation problems in chip-packages is proposed. This low-profile absorber structure is composed of two flat layers where the lower layer is made of absorbing material with high relative permittivity, while the upper layer is made of material with low relative permittivity to better meet the requirements of wide impedance matching. This structure is firstly designed based on theories and full-wave simulations. Then it is fabricated and applied to different absorbing materials working in the frequency range of 20-40GHz to suppress the radiation in a practical chip-package model. Finally, the effectiveness and universality of this structure are verified through measurements of the radiation suppression effect with different absorbing material settings. © 2022 IEEE.

关键词： Electromagnetic compatibility

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