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2012 National Conference on Information Technology and Computer Science

作者： shouxian wen key lab of intelligent computing and signal processing of ministry of education,anhui university hefei,china lei xu key lab of intelligent computing and signal processing of ministry of education,anhui university hefei,china xingguo sun key lab of intelligent computing and signal processing of ministry of education,anhui university hefei,china xiaohui li key lab of intelligent computing and signal processing of ministry of education,anhui university hefei,china

Aiming at the low-rate and short-distance communication in existing temperature and humidity monitoring system,this paper designs a remote monitoring system based on 3G and Internet *** system consists of data acquisition module and data remote transmission ***128 is used to be as a master control chip of data acquisition module,which realizes the data acquisition and pretreatment,and the collected data is transmitted to the host node by the low-power wireless transmission module NRF905 which is installed on slave nodes,and then the converged data is transmitted to Internet by 3G *** system can realize remote monitoring,centralized management and so *** experimental results show that the system has the advantages of low installation cost,low consumption,high sensitivity,high accuracy,long-distance communication and high rate etc.

关键词： DS18B20 3G NRF905 Standard Definition (SD) card Data acquisition subsystem Data remote transmission subsystem.

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一种新型结构的带状线SIR带阻滤波器设计

武汉理工大学学报 2010年第12期32卷 102-104,125页

作者：朱浩然孙玉发安徽大学计算智能与信号处理教育部重点实验室合肥230039

设计了一种新型阶梯阻抗谐振器(SIR)结构的带状线带阻滤波器。在利用带状线间隙电容和并联电感的耦合来设计带阻滤波器时,主线采取城墙线形式,短截线用SIR结构代替常规的λ/4均匀阻抗谐振器(UIR)结构,这样既减小体积,又可以将寄生阻带... 详细信息

设计了一种新型阶梯阻抗谐振器(SIR)结构的带状线带阻滤波器。在利用带状线间隙电容和并联电感的耦合来设计带阻滤波器时,主线采取城墙线形式,短截线用SIR结构代替常规的λ/4均匀阻抗谐振器(UIR)结构,这样既减小体积,又可以将寄生阻带向高端推移,从而增加通带宽度,使得结构设计得到很大的自由度。最后,利用电磁场仿真软件对结构尺寸进行优化仿真,并实际制作一个中心频率为2.45 GHz的SIR带阻滤波器。实测结果和仿真结果吻合良好,达到预计指标参数。

关键词：带阻滤波器阶梯阻抗谐振器带状线

Graphene/MoS_(2-x)O_(x)/graphene photomemristor with tunable non-volatile responsivities for neuromorphic vision processing

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light(Science & Applications) 2023年第2期12卷 284-293页

作者： Xiao Fu Tangxin li Bin Cai Jinshui Miao Gennady NPanin Xinyu Ma jinjin Wang Xiaoyong Jiang Qing li Yi Dong Chunhui Hao Juyi sun Hangyu xu Qixiao Zhao Mengjia Xia Bo Song Fansheng Chen Xiaoshuang Chen Wei Lu Weida Hu School of Physics and Optoelectronic Engineering Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China State key laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China university of Chinese Academy of Sciences 100049 BeijingChina Institute of intelligent Machines HFiPSChinese Academy of SciencesHefei 230031China Jianghuai Frontier Technology Coordination and Innovation Center Hefei 230088China Institute of Microelectronics Technology and High-Purity Materials Russian Academy of SciencesChernogolovkaMoscow district142432Russia

Conventional artificial intelligence(Al)machine vision technology,based on the von Neumann architecture,uses separate sensing,computing,and storage units to process huge amounts of vision data generated in sensory *** frequent movement of redundant data between sensors,processors and memory,however,results in high-power consumption and latency.A more efficient approach is to offload some of the memory and computational tasks to sensor elements that can perceive and process the optical signal ***,we proposed a non-volatile photomemristor,in which the reconfigurable responsivity can be modulated by the charge and/or photon flux through it and further stored in the *** non-volatile photomemristor has a simple two-terminal architecture,in which photoexcited carriers and oxygen-related ions are coupled,leading to a displaced and pinched hysteresis in the current-voltage *** the frst time,non-volatile photomemristors implement computationally complete logic with photoresponse-stateful operations,for which the same photomemristor serves as both a logic gate and memory,using photoresponse as a physical state variable instead of light,voltage and *** polarity reversal of photomemristors shows great potential for in-memory sensing and computing with feature extraction and image recognition for neuromorphic vision.

关键词： tunable operations hysteresis

FAST COMPUTATION OF WIDEBAND RCS USING CHARACTERISTIC BASIS FUNCTION METHOD AND ASYMPTOTIC WAVEFORM EVALUATION TECHNIQUE

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Journal of Electronics(china) 2010年第4期27卷 453-457页

作者： sun Yufa Du Yan Shao Yong key lab. of intelligent computing and signal processing Ministry of Education Anhui University Hefei 230039 China

The Asymptotic Waveform Evaluation (AWE) technique is an extrapolation method that provides a reduced-order model of linear system and has already been successfully used to analyze wideband electromagnetic scattering problems. As the number of unknowns increases, the size of Method Of Moments (MOM) impedance matrix grows very rapidly, so it is a prohibitive task for the computation of wideband Radar Cross Section (RCS) from electrically large object or multi-objects using the traditional AWE technique that needs to solve directly matrix inversion. In this paper, an AWE technique based on the Characteristic Basis Function (CBF) method, which can reduce the matrix size to a manageable size for direct matrix inversion, is proposed to analyze electromagnetic scattering from multi-objects over a given frequency band. Numerical examples are presented to il-lustrate the computational accuracy and efficiency of the proposed method.

关键词： Method of Moments (MOM) Radar Cross Sections (RCS) Characteristic Basis Func-tion (CBF) method Asymptotic Waveform Evaluation (AWE) Multi-objects

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一种新型小型化十一频段手机天线设计

西安电子科技大学学报 2018年第2期45卷 116-121页

作者：杨明孙玉发安徽大学计算智能与信号处理教育部重点实验室安徽合肥230039 亳州学院电子与信息工程系安徽亳州236800

现有手机天线结构复杂、剖面高和尺寸大,为了缩小手机天线的尺寸,研究了小型化低剖面双层微带天线频带展宽的方法,提出了一款紧凑耦合的小型化十一频段手机天线,尺寸仅为37.0mm×7.2mm.该天线通过馈电单极子和地枝节耦合技术,激发多个... 详细信息

现有手机天线结构复杂、剖面高和尺寸大,为了缩小手机天线的尺寸,研究了小型化低剖面双层微带天线频带展宽的方法,提出了一款紧凑耦合的小型化十一频段手机天线,尺寸仅为37.0mm×7.2mm.该天线通过馈电单极子和地枝节耦合技术,激发多个谐振模,拓宽高频带宽,再利用加载电感方法,使低频谐振点偏移,拓宽低频带宽.实测结果表明,该方法可以有效展宽天线频带,能够覆盖长期演进、无线广域网8个频段,并且满足全球定位系统、无线保真以及蓝牙频段内S11小于-10dB的要求,与传统微带天线相比,该天线具有尺寸更小、结构简单、频带宽等优点,具有良好的辐射增益和辐射效率.

关键词：长期演进小型化多频段手机天线

基于FDTD算法研究超短脉冲与二能级原子系统的相互作用

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发光学报 2019年第5期40卷 680-685页

作者：孙龙吴博冯大政王石语邢孟道西安电子科技大学雷达信号处理国家重点实验室陕西西安710071 西安电子科技大学信息感知技术协同创新中心陕西西安710071 中国电子科技集团公司第三十八研究所安徽合肥230088 安徽大学信号与信息处理教育部重点实验室安徽合肥230039 西安电子科技大学技术物理学院陕西西安710071

以往对于超短脉冲与二能级原子系统的研究大多基于一些近似方法(慢变包络近似和旋转波近似等),从而求得解析的近似解。但是,由于忽略掉一些有用的光场中的信息,就会造成光场导数项所产生的非线性性质的缺失。本文基于FDTD算法和预测-校... 详细信息

以往对于超短脉冲与二能级原子系统的研究大多基于一些近似方法(慢变包络近似和旋转波近似等),从而求得解析的近似解。但是,由于忽略掉一些有用的光场中的信息,就会造成光场导数项所产生的非线性性质的缺失。本文基于FDTD算法和预测-校正法相结合,建立了预测-校正FDTD算法,用于研究超短脉冲与二能级原子系统的相互作用,以准确地描述光场与原子系统相互作用的特征,验证了面积定理的部分规律;进一步构建了能够实现完全反转原子系统上下能级粒子的短脉冲。相关研究可为目标的特征分析提供参考。

关键词：超短脉冲二能级原子系统 FDTD算法预测-校正法面积定理

基于增益媒质的亚波长纳米阵列超传输特性研究

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发光学报 2019年第3期40卷 366-373页

作者：孙龙牛凯坤冯大政王石语邢孟道西安电子科技大学雷达信号处理国家重点实验室陕西西安710071 西安电子科技大学信息感知技术协同创新中心陕西西安710071 中国电子科技集团公司第三十八研究所安徽合肥230088 安徽大学信号与信息处理教育部重点实验室安徽合肥230039 西安电子科技大学技术物理学院陕西西安710071

增益媒质因其优良的放大特性和广阔的应用前景吸引了国内外学者的广泛关注,然而,激发增益媒质补偿欧姆损耗需要较强的外部能量,极大地限制了增益媒质的发展前景。本文使用辅助位微分方程的时域有限差分方法研究了麦克斯韦方程与半经典... 详细信息

增益媒质因其优良的放大特性和广阔的应用前景吸引了国内外学者的广泛关注,然而,激发增益媒质补偿欧姆损耗需要较强的外部能量,极大地限制了增益媒质的发展前景。本文使用辅助位微分方程的时域有限差分方法研究了麦克斯韦方程与半经典的电子速率方程相耦合的自洽仿真过程,并基于四能级原子系统描述的增益媒质和异常光传输现象间的耦合机制,提出了一种新颖的含亚波长周期裂缝的增益/金属/增益纳米阵列结构。研究结果表明,本文提出的纳米结构可以使用较低外部能量实现完全补偿欧姆损耗的目的。该结果对深入了解纳米结构和增益媒质之间的相互作用有着重要的意义。

关键词：增益媒质时域有限差分方法异常光学传输