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Substrate bias effects in p-channel GaN-on-Si transistors

Science China(Information Sciences) 2025年第1期68卷 404-405页

作者： Mengyao ZHAO Jie MA Lanlan YANG Chuanqi PAN Denggui WANG Jianjun ZHOU Sheng LI Jiaxing WEI Long ZHANG Siyang LIU Weifeng SUN National ASIC System Engineering Research Center School of Integrated Circuits Southeast University National Center of Technology Innovation for Electronic Design Automation Southeast University National Key Laboratory of Solid-State Microwave Devices and Circuits

The drain current （ID） of the n-channel GaN field-effecttransistor （n-FET） is influenced by the substrate-to-source bias voltage (VBS)（substrate bias effect）[1].Actually,nonzero VBSis also likely to occur in p-FET in real application,because the source electrode of p-FET is usually connected to high *** study reports the dependency between IDand VBSin p-FET for the first time,and analyzes the underlying mechanisms from the perspective of vertical electric field （EF） distribution.

关键词： bias effects p-channel substrate transistors

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Functionalised B-Cu@F-Ag@Au trimetallic nanomaterials with long term stability for rapid and highly sensitive in situ SERS detection of furfural in transformer oil

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High Voltage 2023年第2期8卷 293-304页

作者： Yu Lei Changding Wang Weiping Kong Mingliang Wang Xinyuan Zhang Abdolmaleki Nima Caisheng Wang Weigen Chen Fu Wan School of Electrical Engineering Chongqing UniversityChongqingChina State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing UniversityChongqingChina Electrical and Computer Engineering Wayne State UniversityWayneNebraskaUSA

The surface-enhanced Raman scattering(SERS)substrates enable a highly sensitive detection of furfural in the transformer ***,detection substrates with long-term stability are still extremely *** this work,we anchored the thiol-containing coupling agents 2,5-dimercapto-1,3,4-thiadiazole(DMTD)and 1,4-benzenedithiol(BDT)on the surface of bubble copper(B-Cu)and flower-like silver nanoparticles(FAg),*** three-dimensional SERS detection substrates with long-term stability by using a combination of chemical reduction and self-assembly methods were *** substrate has a minimum detection limit of 10^(−9) M for rhodamine B in oil with an enhancement factor of up to 2.23×10^(7).Importantly,the three-crystal BCu@F-Ag_(1)@Au_(5) substrate was used for the detection of furfural in the transformer oil with a detection limit of 2 mg/L and a relative standard deviation value of 2.46%.After 60 days of a simulated operation,the detection signal of furfural in the transformer oil samples at 75℃ and still reached the initial value of 77.53%,indicating that the substrate has a good long-term *** triple frame structured SERS detection platform shows great potential in tracking furfural in the aging transformer oil mixing systems.

关键词： stability. stability SERS

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Geochemical evolution of Mesozoic and Cenozoic mafic igneous rocks in the eastern Tethyan realm:Implications for the tectonic evolution of convergent plate margins

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Science China Earth Sciences 2025年第4期68卷 1116-1141页

作者： Long CHEN YongFei ZHENG Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Lab of Submarine GeoSciences and Prospecting TechniquesMOE and College of Marine GeoSciencesOcean University of ChinaQingdao266100China Laoshan Laboratory Qingdao266237China State Key Laboratory of Lithospheric and Environmental Coevolution School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei230026China

The convergent plate margins of Paleo-Tethys Ocean and Neo-Tethys Ocean are the two orogenic belts in the eastern Tethyan realm with the best exposures of igneous *** studies have revealed that both belts have developed not only island arc basalts(IAB)-like mafic magmatism but also ocean island basalts(OIB)±mid-ocean ridge basalts(MORB)-like mafic magmatism in various stages of their formation and *** different types of mafic igneous rocks show both similarity and difference that were acquired in the various stages from oceanic subduction through continental collision to intracontinental *** examination and comparison of these igneous rocks can provide insights into the tectonic evolution of the eastern Tethyan *** study integrates the spatiotemporal distribution and geochemical compositions of Mesozoic and Cenozoic primitive mafic igneous rocks in the eastern Tethyan realm within *** results show:(1)in addition to the stage of oceanic subduction,the stages of continental collision and intracontinental reworking are the primary periods of mafic magmatic activity at convergent plate margins,consistent across the Paleo-Tethyan and Neo-Tethyan domains.(2)OIB(±MORB)-like mafic igneous rocks are present not only in the stage of continental collision in both domains but also in the stage of intracontinental reworking in the Paleo-Tethyan domain.(3)In the stages from oceanic subduction to continental collision,the compositions of IAB-like mafic igneous rocks in both domains exhibit continuous variations,with remarkable similarities in lithology,elemental and isotopic characteristics,indicating their formation through similar deep geodynamic processes—partial melting of the mantle wedge metasomatized by subducting slab-derived fluids in the forms of aqueous solution and/or hydrous *** a consequence,the mafic igneous rocks display more compositional inheritance than *** the stage of continental collision,

关键词： Convergent plate margin Oceanic subduction Continental collision Intracontinental reworking Mafic magma-tism Crust-mantle interaction

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The Autonomous Pipeline Navigation of a Cockroach Bio-Robot with Enhanced Walking Stimuli

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Cyborg and Bionic systems 2023年第1期4卷 47-55页

作者： Songsong Ma Yuansheng Chen Songlin Yang Shen Liu Lingqi Tang Bing Li Yao Li State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbinChina Guangdong Key Laboratory of Intelligent Morphing Mechanisms and Adaptive Robotics Harbin Institute of TechnologyShenzhenChina School of Mechanical Engineering and Automation Harbin Institute of TechnologyShenzhenChina The Biorobotics Institute Scuola Superiore Sant'AnnaPisaItaly

Tens of crawling bio-robots with cockroaches as the mobile platform have been developed with various *** with artificial crawling robots of the same size,they revealed better flexibility,larger payload,and stronger *** features made bio-robots ideal for pipeline inspection scenarios because the advancements in locomotion mechanisms and efficient power systems are still hurdles for current artificial *** this study,we controlled the bio-robot to crawl in the confined dark pipeline and achieved autonomous motion control with the help of an onboard sensing ***,a micro-camera was mounted on the electronic backpack of the cockroach for image collection,and an IMU sensor was used to compute its body *** electronic backpack transmitted images to the host computer for junction recognition and distance ***,the insect's habituation to electrical stimulation has long been an uncertain factor in the control of ***,a synergistic stimulation strategy was proposed to markedly reduce the habituation and increase the number of effective turning controls to over 100 *** is also found that both the increase of payload and the application of stimulations could promote the metabolic rate by monitoring carbon dioxide *** the integration of synergistic stimulation and autonomous control,we demonstrated the fully autonomous pipeline navigation with our cockroach bio-robot,which realized the cycle number of approximately 10 in a *** research provides a novel technology that has the potential for practical applications in the future.

关键词： robot artificial Robot

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A framework of day-ahead wind supply power forecasting by risk scenario perception

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IEEE Transactions on Sustainable Energy 2025年第3期16卷 1659-1672页

作者： Yang, Mao Huang, Yutong Wang, Zhao Wang, Bo Su, Xin Northeast Electric Power University Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Jilin132012 China China Electric Power Research Institute State Key Laboratory of Operation and Contr Ol of Renewable Energy & Storage Systems Beijing100912 China

Wind power forecasting (WPF) systems are essential to maintain the safe and stable operation of the power system in case of large-scale grid-connected wind farms. However, the current forecasting has the problem of disunity between statistical value and application value, that is, it only pays attention to its forecasting accuracy and ignores the risks caused by it in the power system. In order to solve the above problems, this study proposes a framework of wind supply power forecasting (WSPF) for wind farm cluster, which takes into account the risk scenario perception. First of all, aiming at the predicted risk phenomenon in WPF, TimesNet combined with the fluctuation information of Numerical Weather Prediction (NWP) wind speed is used to identify the corresponding risk scenarios. Secondly, the effective consumption area and power supply risk area evaluation index, as well as the accuracy of WSPF are defined, and the optimal forecasting curve correction scheme is fitted according to the index. Thirdly, taking into account the correction scheme and identification results, a variety of predictors are used to verify the WSPF according to the above framework. Finally, the proposed method is applied to a wind farm cluster in Inner Mongolia Autonomous region of China, the average accuracy of WSPF has increased by 37%, which verifies the effectiveness and universality of this method. © 2010-2012 IEEE.

关键词： Wind forecasting

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Design of Angle-stable and High-transmittance Frequency Selective Rasorber Based on Bilateral Connected Interdigital Resonator

Design of Angle-stable and High-transmittance Frequency Sele...

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2024 Photonics and Electromagnetics Research Symposium, PIERS 2024

作者： Xu, Yixuan Shi, Tongtong Hu, Xueyi Yan, Yuchen Wu, Weiwei National University of Defense Technology State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System Changsha China

ISBN: (纸本)9798350375909

This paper presents a novel frequency selective rasorber (FSR) design with a highly transparent window. FSR is a two-dimensional periodic structure consisting of a lossless FSS layer, an air layer, and a lossy resistive thin layer. The lossless bandpass layer consists of a bimetallic square ring. It provides a bandpass response with double transmission zeros by parallel resonance. The impedance layer consists of bilaterally connected interdigital resonator (BCIR) and crossed metal wires loaded with resistors. Among them, the BCIR can produce parallel resonance. When the lossless layer coincides with the parallel resonance frequency of the lossy layer, the FSR can produce a high transmittance window. The whole structure can produce a frequency response with low-frequency absorption and high-frequency transmission. The simulation results show that the structure has almost the same response under both TM and TE polarization conditions. the reflection coefficient of the FSR in the band of 5.03-11.61 GHz under TE polarization is below -10 dB. The transmission coefficient of the FSR in the 8.57-9.73 GHz band is higher than -3 dB, where the minimum insertion loss of the transmission window can reach -0.00652 dB near 9.12 GHz. Meanwhile, the FSR has good angular stability up to 40° angle of incidence. Finally, the equivalent circuit model (ECM) of FSR is also presented. © 2024 IEEE.

关键词： Equivalent circuits

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Mechanical Properties Inside Origami-Inspired Structures: An Overview

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Applied Mechanics Reviews 2025年第1期77卷 011001页

作者： Yan, Peng Huang, Hailin Meloni, Marco Li, Bing Cai, Jianguo Department of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen518052 China Harbin Institute of Technology Shenzhen518052 China Key Laboratory of C & PC Structures of Ministry of Education National Prestress Engineering Research Center Southeast University Nanjing211189 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin150001 China Guangdong Provincial Key Laboratory of Intelligent Morphing Mechanisms and Adaptive Robotics Harbin Institute of Technology Shenzhen518052 China Key University Laboratory of Mechanism Machine Theory and Intelligent Unmanned Systems of Guangdong Habin Institute of Technology Shenzhen518052 China

In recent decades, origami has transitioned from a traditional art form into a systematic field of scientific inquiry, characterized by attributes such as high foldability, lightweight frameworks, diverse deformation modes, and limited degrees-of-freedom. Despite the abundant literature on smart materials, actuation methods, design principles, and manufacturing techniques, comprehensive reviews focusing on the mechanical properties of origami-inspired structures are relatively rare and unsystematic. This review aims to fill this void by analyzing and summarizing the significant studies conducted on the mechanical properties of origami-inspired structures from 2013 to 2023. We begin with an overview that includes essential definitions of origami, classical origami patterns, and their associated tessellated or stacked structures. Following this, we delve into the principal dynamic modeling method for origami and conduct an in-depth analysis of the key mechanical properties of origami-inspired structures. These properties include tunable stiffness, bistability and multistability, metamechanical properties demonstrated by origami-based metamaterials, and bio-inspired mechanical properties. Finally, we conclude with a comprehensive summary that discusses the current challenges and future directions in the field of origami-inspired structures. Our review provides a thorough synthesis of both the mechanical properties and practical applications of origami-inspired structures, aiming to serve as a reference and stimulate further research. © 2025 American Society of Mechanical Engineers (ASME). All rights reserved.

关键词： Degrees of freedom (mechanics)

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Copper-catalyzed photoredox 1,4-amidocyanation of 1,3-enynes with N-amidopyridin-1-ium salts and TMSCN:Facile access toα-amido allenyl nitriles

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Chinese Chemical Letters 2024年第11期35卷 344-348页

作者： Liangfeng Yang Liang Zeng Yanping Zhu Qiuan Wang Jinheng Li State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan UniversityChangsha 410082China State Key Laboratory Base of Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China School of Pharmacy Key Laboratory of Molecular Pharmacology and Drug EvaluationMinistry of EducationCollaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of ShandongYantai UniversityYantai 264005China State Key Laboratory of Applied Organic Chemistry Lanzhou UniversityLanzhou 730000China

A new 1,4-amidocyanation of 1,3-enynes with N-amidopyridin-1-ium salts and TMSCN using a copper and photoredox synergetic catalysis for producingα-amido allenyl nitriles is *** N-amidopyridin-1-ium salts as the amidyl radical precursors,the reaction enables the formation of two new bonds,one C(sp^(3))-N bond and one C(sp^(2))-C(sp)bond,in a single reaction *** reaction represents a mild,general route to the construction of theα-amido allenyl nitrile architectures,which characterizes a broad scope,a good functional group compatibility and an excellent selectivity.

关键词： Copper Photoredox catalysis Amidocyanation N-(Sulfonamido)pyridin-1-ium salts 1,3-Enynes α-Sulfonamido allenyl nitriles

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Cold sintering process for fabrication of a superhydrophobic ZnO-polytetrafluoroethylene(PTFE)ceramic composite

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Journal of Advanced Ceramics 2023年第9期12卷 1758-1766页

作者： Xuetong Zhao Yang Yang Li Cheng Jing Guo Shenglin Kang Yuchen Li Xilin Wang Lijun Yang Ruijin Liao State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqing 400044China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

Composite coatings or films with polytetrafluoroethylene(PTFE)are typically utilized to offer superhydrophobic ***,the superhydrophobic surfaces usually have limited durability and require complicated fabrication ***,we report the successful integration of PTFE with ZnO ceramics to achieve superhydrophobicity via a one-step sintering method,cold sintering process(CSP),at 300℃.(1–x)ZnO–x PTFE ceramic composites with x ranging from 0 to 70 vol%are densified with relative density of over 97%.Micro/nano-scale PTFE polymer is dispersed among ZnO grains forming polymer grain boundary phases,which modulate surface morphology and surface energy of the ZnO–PTFE ceramic *** the 60 vol%ZnO–40 vol%PTFE ceramic composite,superhydrophobic properties are optimized with static water contact angles(WCAs)and sliding angles(SAs)of 162°and 7°,*** abrading into various thicknesses(2.52,2.26,and 1.99 mm)and contaminating with graphite powders on the surface,WCA and SA are still maintained with a high level of 157°–160°and 7°–9.3°,*** work indicates that CSP provides a promising pathway to integrate polymers with ceramics to realize stable superhydrophobicity.

关键词： cold sintering process(CSP) ZnO-polytetrafluoroethylene(PTFE)ceramic composites contact angles sliding angles(SAs) superhydrophobicity

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Frequency-phase composite modulation-based waveform design for detecting and jamming integrated signal 6

Frequency-phase composite modulation-based waveform design f...

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6th International Conference on Intelligent Control, Measurement and Signal Processing, ICMSP 2024

作者： Guo, Haoting Chang, Cui Wang, Fulai Pang, Chen Li, Yongzhen National University of Defense Technology State Key Laboratory of Complex Electromagnetic Environment Effects on Electronic and Information System Changsha China

ISBN: (纸本)9798331516550

In the field of multifunctional radar waveform design, this paper proposes an integrated waveform design method for detecting and jamming, which is by the composite modulation of intra-pulse FM signals (non-linear frequency modulation (NLFM) and polyphase coded FM (PCFM) signals) and inter-pulse phase modulation signals. In this paper, two different modulation schemes are described in detail and a mathematical model of the integrated signals is developed. In addition, an objective function for evaluating the comprehensive performance of the detecting and jamming integrated signal is proposed in this paper. Simulation experiments verify that the proposed integrated signal can effectively suppress jamming on the non-cooperative radar while maintaining excellent detection performance, and exhibiting noise-like characteristics in the frequency band, thus reducing the probability of being intercepted by the non-cooperative radar. Based on the evaluation of the proposed objective function, the integrated signal in this paper surpasses some of the integrated signals proposed by domestic scholars in terms of comprehensive performance. It provides new theoretical and technological support for the design of integrated signals of multifunctional radar. © 2024 IEEE.

关键词： Jamming

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