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Graphene-based dual-function acoustic transducers for machine learning-assisted human-robot interfaces

InfoMat 2023年第2期5卷 66-79页

作者： Hao Sun Xin Gao Liang-Yan Guo Lu-Qi Tao Zi Hao Guo Yangshi Shao Tianrui Cui Yi Yang Xiong Pu Tian-Ling Ren Institute of microelectronics and Beijing National research center for Information Science and Technology(BNRist) Tsinghua UniversityBeijingPeople's Republic of China CAS center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingPeople's Republic of China State Key Laboratory of Power Transmission Equipment and System Security and New Technology School of Electrical EngineeringChongqing UniversityChongqingPeople's Republic of China school of Computer Science&Technology Beijing Institute of TechnologyBeijingPeople's Republic of China school of Automation and Electrical engineering University of Science and Technology BeijingBeijingPeople's Republic of China

Human–robot interface(HRI)electronics are critical for realizing robotic ***,we report graphene-based dual-function acoustic transducers for machine learning-assisted human–robot interfaces(GHRI).The GHRI functions both an artificial ear through the triboelectric acoustic sensing mechanism and an artificial mouth through the thermoacoustic sound emission *** success of the integrated device is also attributed to the multifunctional laser-induced graphene,as either triboelectric materials,electrodes,or thermoacoustic *** systematically optimizing the structure parameters,the GHRI achieves high sensitivity(4500 mV Pa^(–1))and operating durability(1000000 cycles and 60 days),capable of recognizing speech identities,emotions,content,and other information in the human *** the assistance of machine learning,30 speech categories are trained by a convolutional neural network,and the accuracy reaches 99.66%and 96.63%in training datasets and test ***,GHRI is used for artificial intelligence communication based on recognized speech *** work shows broad prospects for the development of robotic intelligence.

关键词： human-robot interface laser-induced graphene machine learning thermoacoustic triboelectric nanogenerator

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Editorial

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Intelligent and Converged Networks 2022年第1期3卷 I0001-I0003页

作者： Linglong Dai Chan-Byoung Chae Shi Jin Marco Di Renzo Rui Zhang Beijing National research center for Information Science and Technology(BNRist)and the Department of Electronic engineering Tsinghua UniversityBeijing 100084China school of integrated Technology Yonsei Institute of Convergence TechnologyYonsei UniversityIncheon 406-840Republic of Korea. National Mobile communications research Laboratory Southeast UniversityNanjing 210096China. the UniversitéParis-Saclay CNRSCentraleSupélecLaboratoire des Signaux et Systèmes3 Rue Joliot-Curie91192 Gif-sur-YvetteFrance. Department of Electrical and Computer engineering National University of SingaporeSingapore 117583Singapore

Reconfigurable Intelligent Surface(RIS),also known as intelligent reflecting surface or large intelligent surface,is an emerging new physical-layer technology in the field of wireless *** basic idea of RIS is to deploy a reconfigurable passive array in the environment to manipulate the propagation of electron-magnetic *** promises a new design paradigm for wireless communications,where the wireless propagation environment can be dynamically controlled,which is substantially different from the conventional design that focuses only on the transmitter and *** RIS-aided wireless communications,some of the current methodologies in conventional communication systems need to be revised,and some novel solutions are required to realize the potential benefits of the *** the number of publications about RIS has recently sharply increased,there are still many challenging issues to be extensively investigated,such as the RIS channel modeling,fundamental performance limits,the system design,joint optimization of the RIS and the transceivers,channel state information acquisition,and interdisciplinary applications.

关键词： passive sharply revised

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LanePost:Lane-Based Optimal Routing Protocol for Delay-Tolerant Maritime Networks

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China communications 2017年第2期14卷 65-78页

作者： Xiongfei Geng Yongcai Wang Haoran Feng Lu Zhang China Waterborne Transport research Institute Beijing China school of Software and microelectronics Peking University Beijing Department of Computer Sciences Renmin University of China Beijing China National engineering research center of Software engineering Peking University Beijing China

***, *** radio links empowered by Wi Fi, Wi MAX etc have been recently exploited to build maritime *** mesh networks to provide internet services to *** users. However, because of the mobility of the vessels/ships and the large *** distances, nodes in the maritime network are frequently disconnected, forcing data communication in the maritime mesh networks to be opportunistic and ***. In this paper, we present Lane Post, an optimization approach for maritime *** routing protocol. We exploit the shipping lane information to predict the rendezvous opportunities of the ships to optimize the route selection in *** routing. In particular, we show that when the shipping lane information is available, an opportunistic routing graph(ORG) for each ship can be constructed to predict its *** data routing opportunities to the other ships or to the shore. Based on the ORG, we develop an optimal route protocol(i.e., Lane Post) for each ship to minimize its delay of *** packet delivery via dynamic programming. We discussed the ways of collecting shipping lane information by centralized method or distributed *** proposed Lane Post protocol was evaluated by ONE, an *** *** network simulator, which shows its dramatic performance improvement in terms of delay reduction compared to the *** opportunistic routing protocols.

关键词： delay-tolerant maritime multihop networks opportunistic routing traffic lane delay minimization waterway networks

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Polarization Projection for 3D Geometry-Based Stochastic Channel Model

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China communications 2015年第10期12卷 52-63页

作者： PANG Lihua ZHANG Yang GONG Fengkui WANG Anyi XIAO Liyuan LIANG Xiao WANG Qiaofeng LI Jiandong school of Information engineering Xi'an University of Science and Technology State Key Laboratory of integrated Service Networks Xidian University National Mobile communications research Laboratory Southeast University Service Development center State Commission Office for Public Sector Reform System Simulation Department ZTE Corporation

Comprehensive radiation characteristics of polarized antenna are crucial in creating practical channel coefficients for next generation wireless communication system *** currently supported within3 D geometry-based stochastic channel models(GSCM),field patterns are technically obtained by chamber measurement(or by its best fitting).However,in some channel related performance analysis scenarios,design insight can be crystallized better by starting the derivations with theoretical co-polarization and cross-polarization ***,these two components are mathematically linked with field patterns through the proposed polarization projection *** this manuscript,we focus on revealing the transformation criterion of polarization states between the antenna plane and the propagation *** practice,it makes retrieving the field patterns by electromagnetic computation ***,the impact imposed by distinct antenna orientations is geometrically illustrated and consequently incorporated into the proposed *** will further facilitate flexible performance evaluation of related radio transmission *** conclusions are verified by the closed-form expression of the dipole field pattern(via an analytical approach) and by chamber measurement ***,we find that its 2D degenerative case is aligned with the definitions in 3^(rd) generation partnership project(3GPP)technical report *** most obvious benefit of the proposed algorithm is to significantly reduce the cost on generating channel coefficients in GSCM simulation.

关键词：三维几何模型信道模型随机无线通信系统交叉极化投影算法无线传输技术天线综合

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High-responsivity solar-blind photodetector based on MOCVD-grown Si-dopedβ-Ga_(2)O_(3)thin film

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Chinese Physics B 2021年第5期30卷 595-601页

作者：支钰崧江为宇刘增刘媛媛褚旭龙刘佳航李山晏祖勇王月晖李培刚吴真平唐为华 Laboratory of Information Functional Materials and Devices School of Science&State Key Laboratory of Information Photonics and Optical CommunicationsBeijing University of Posts and TelecommunicationsBeijing 100876China center of Materials Science and Optoelectronics engineering University of Chinese Academy of SciencesBeijing 100049China The engineering research center for Semiconductor integrated Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China China Aerospace System Simulation Technology Co. Ltd.(Beijing)Beijing 100195China College of Electronic and Optical engineering&College of microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210023China

Si-dopedβ-Ga_(2)O_(3)films are fabricated through metal-organic chemical vapor deposition(MOCVD).Solar-blind ultraviolet(UV)photodetector(PD)based on the films is fabricated by standard photolithography,and the photodetection properties are *** results show that the photocurrent increases to 11.2 mA under 200μW·cm^(-2)254 nm illumination and±20 V bias,leading to photo-responsivity as high as 788 A·W^(-1).The Si-dopedβ-Ga2O3-based PD is promised to perform solar-blind photodetection with high performance.

关键词： Si-dopedβ-Ga_(2)O_(3) metal-organic chemical vapor deposition(MOCVD) solar-blind high responsivity

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Gate-regulated transition temperatures for electron hopping behaviours in silicon junctionless nanowire transistors

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Journal of Semiconductors 2020年第7期41卷 44-48页

作者： Xinyu Wu Weihua Han Xiaosong Zhao Yangyan Guo Xiaodi Zhang Fuhua Yang school of microelectronics University of Chinese Academy of SciencesBeijing 100049China engineering research center for Semiconductor integrated Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China State Key Laboratory for Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

We investigate gate-regulated transition temperatures for electron hopping behaviours through discrete ionized dopant atoms in silicon junctionless nanowire *** demonstrate that the localization length of the wave function in the spatial distribution is able to be manipulated by the gate electric *** transition temperatures regulated as the function of the localization length and the density of states near the Fermi energy level allow us to understand the electron hopping behaviours under the influence of thermal activation energy and Coulomb interaction *** is useful for future quantum information processing by single dopant atoms in silicon.

关键词： silicon junctionless nanowire transistor discrete dopant atoms gate regulation transition temperatures

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Antenna-in-package system integrated with meander line antenna based on LTCC technology

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Frontiers of Information Technology & Electronic engineering 2016年第1期17卷 67-73页

作者： Gang DONG Wei XIONG Zhao-yao WU Yin-tang YANG school of microelectronics Xidian University

We present an antenna-in-package system integrated with a meander line antenna based on low temperature co-fired ceramic(LTCC) technology. The proposed system employs a meander line patch antenna, a packaging layer, and a laminated multi-chip module(MCM) for integration of integrated circuit(IC) bare chips.A microstrip feed line is used to reduce the interaction between patch and package. To decrease electromagnetic coupling, a via hole structure is designed and analyzed. The meander line antenna achieved a bandwidth of 220 MHz with the center frequency at 2.4 GHz, a maximum gain of 2.2 d B, and a radiation efficiency about 90% over its operational frequency. The whole system, with a small size of 20.2 mm×6.1 mm×2.6 mm, can be easily realized by a standard LTCC process. This antenna-in-package system integrated with a meander line antenna was fabricated and the experimental results agreed with simulations well.

关键词： AntennaAn-package (AiP), Meander line antenna, Multi-chip module (MCM), Low temperature co-fired ceramic (LTCC)

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Moire meta-device for flexibly controlled Bessel beam generation

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Photonics research 2023年第1期11卷 100-108页

作者： GUOCUI WANG TIAN ZHOU JIANZHOU HUANG XINKE WANG BIN HU YAN ZHANG Beijing engineering research center for Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Metamaterials and Devices Key Laboratory of Terahertz OptoelectronicsMinistry of EducationBeijing Advanced Innovation Center for Imaging Theory and TechnologyDepartment of PhysicsCapital Normal UniversityBeijing 100048China

High-order Bessel beams are of great interest for most stable long-range optical quantum communications due to their unique nondiffraction,self-healing,and orbital angular-momentum-carrying *** now,metasurfaces based on Bessel beam generators are mostly static and focused on generating zero-order Bessel beams.A moirémeta-device made of two cascaded metasurfaces is a simple,effective strategy to dynamically manipulate the wavefront of electromagnetic(EM)waves by mutual rotation between the two ***,an all-dielectric moirémeta-device integrated with the functions of an axicon and a spiral phase plate to generate terahertz Bessel beams is *** only the order,but also the nondiffraction length of the generated Bessel beam can be continuously *** a proof of concept of the feasibility of the platform,the case of tuning order is experimentally *** experimental results are in good agreement with the theoretical *** addition,we also numerically proved that the nondiffraction length of the Bessel beam can be adjusted with the same *** moirémeta-device platform is powerful in dynamically manipulating the wavefront of EM waves and provides an effective strategy for continuously controlling the properties of the Bessel beam,which may find applications in optical communications,particle manipulation,and super-resolution imaging.

关键词： Bessel beam continuously

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Advanced RF filters for wireless communications

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Chip 2023年第4期2卷 1-26页

作者： Kai Yang Chenggong He Jiming Fang Xinhui Cui Haiding Sun Yansong Yang Chengjie Zuo school of microelectronics University of Science and Technology of ChinaHefei 230088China YUNTA Technologies and ANUKI Technologies Hefei 230088China Department of Electronic and Computer engineering The Hong Kong University of Science and TechnologyHong Kong 999077China

This paper provides a comprehensive review of advanced radio fre-quency(RF)filter technologies available in miniature chip or inte-grated circuit(IC)form for wireless communication *** RF filter technologies were organized according to the time-line of their introduction,in conjunction with each generation of wireless(cellular)communication standards(1G to 5G).This ap-proach enabled a clear explanation of the corresponding invention history,working principles,typical applications and future develop-ment *** article covered commercially successful acoustic filter technologies,including the widely used surface acoustic wave(SAW)and bulk acoustic wave(BAW)filters,as well as electromag-netic filter technologies based on low-temperature co-fired ceramic(LTCC)and integrated passive device(IPD).Additionally,emerg-ing filter technologies such as IHP-SAW,suspended thin-film lithium niobate(LiNbO3 or LN)resonant devices and hybrid were also *** order to achieve higher performance,smaller form factor and lower cost for the wireless communication industry,it is believed that fundamental breakthroughs in materials and fabrication tech-niques are necessary for the future development of RF filters.

关键词： RF filter Acoustic wave Piezoelectric Electromagnetic Hy-brid

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Prediction of crossing nodal-lines and large intrinsic spin Hall conductivity in topological Dirac semimetal Ta3As family

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npj Computational Materials 2021年第1期7卷 333-337页

作者： Wenjie Hou Jian Liu Xi Zuo Jian Xu Xueying Zhang Desheng Liu Mingwen Zhao Zhen-Gang Zhu Hong-Gang Luo Weisheng Zhao Fert Beijing Institute MIIT Key Laboratory of SpintronicsSchool of Integrated Circuit Science and EngineeringBeihang UniversityBeijingChina Beihang-Goertek Joint microelectronics Institute Qingdao Research InstituteBeihang UniversityQingdaoChina school of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinanChina Beijing Computational Science research center BeijingChina school of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijingChina CAS center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijingChina school of Physical Science and Technology Lanzhou UniversityLanzhouChina

Topological insulators(TIs)are considered as ideal platforms for generating large spin Hall conductivity(SHC),however,the bulk carrier problem,which is unavoidable in TIs,hinders their practical ***,topological semimetals(TSMs)have been proposed to achieve large SHC to replace ***,the ideal TSM candidates with large SHC are still *** terms of firstprinciples calculations,we predict that Ta3As family compounds exhibit complex crossing nodal-lines(CNL)properties in absence of the spin-orbit coupling(SOC).However,they transfer to Dirac TSMs under the influence of strong SOC,and present large SHC around Fermi level in ***,the SHC value of Ta_(3)Y(Y=As,Sb,Bi)is around 1500–1700 e/h=eTeΩ·cmT^(-1),which is comparable to noble metal Pt and much larger than TIs,Weyl TSMs,and 4d/5d transition *** work not only suggests a kind of TSM family with interesting Dirac CNL around Fermi level,but also paves the way for searching large intrinsic SHC materials in complex CNL TSM systems.

关键词： topological Dirac conductivity

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