检索结果-南通市图书馆

Science china(information sciences) 2011年第1期54卷 197-203页

作者： geng xiurui1,zhao yongchao1,liu suhong2 & wang fuxiang3 1key laboratory of technology in geo-spatial information processing and application system, institute of electronics,chinese academy of sciences,beijing 100080,china 2State key laboratory of Remote Sensing Science,Jointly Sponsored by beijing Normal University and the institute of Remote Sensing applications of chinese academy of sciences, School of geography,beijing Normal University,beijing 100875,china 3School of electronics and information Engineering,Beihang University,beijing 100191,china key laboratory of technology in geo-spatial information processing and application system Institute of Electronics Chinese Academy of Sciences Beijing China State key laboratory of Remote Sensing Science Jointly Sponsored by beijing Normal University and the institute of Remote Sensing applications of chinese academy of sciences School of Geography Beijing Normal University Beijing China School of electronics and information Engineering Beihang University Beijing China

This paper gives the definition of the high-dimensional cross product and its calculation by extending the 3-D cross product definition into the high-dimensional vector *** on the properties of the cross product,the volume variance index(VVI)is proposed to be used in extracting automatically the endmembers of the hypherspectral imagery which eliminates the shortcoming of the traditional method of using simplex only where the extraction results were easily impacted by the abnormal pixels.A case study of endmembers extraction experiment using the VVI method with the AVIRIS data for Cuprite has shown a very good result.

关键词： endmember simplex hyperspectral imagery cross product

Dual-turbo receiver architecture for turbo coded MIMO-OFDM systems

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science china(information sciences) 2012年第2期55卷 384-395页

作者： wang WenJin1,GAO XiQi1,WU XiaoFu2,YOU XiaoHu1,zhao ChunMing1 & WONG Kai-Kit3 1National Communication Research laboratory,Southeast University,Nanjing 210096,china 2Nanjing institute of Communications Engineering,Nanjing 210007,china 3Department of Electrical and Electronic Engineering,University College London London WC1E 7JE,UK National Communication Research laboratory Southeast University Nanjing China Nanjing institute of Communications Engineering Nanjing China Department of Electrical and Electronic Engineering University College London London UK

This paper presents a novel architecture of iterative receivers with two layers of iterations for turbo coded multiple-input and multiple-output orthogonal frequency-division multiplexing(MIMO-OFDM)systems,where soft messages are passed not only between the MIMO detector and the turbo decoder,but also between the two component decoders within the turbo *** first derive the factor graph representation of a turbo coded system as a basic building block for developing the iterative ***,a new soft message passing schedule over the factor graph is proposed,resulting in the proposed dual-turbo receiver architecture(DTRA).In DTRA,the MIMO detector and the turbo decoder work concurrently,and the soft messages for both layers of iterations are updated instantaneously,instead of the block-based exchange of soft messages in the conventional iterative *** so doing,the processing latency can be greatly reduced while low computational complexity can be achieved.

关键词： MIMO-OFDM iterative detection and decoding turbo codes

Spatio-temporal dynamics of neural activities involved in empathy for pain:a combined ERP and sLORETA study

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Spatio-temporal dynamics of neural activities involved in em...

Pushing the high-k scalability limit with a superparaelectric gate layer

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： Jin wang~(1,2),Zhi YANG~1,Jin-Ping zhao~3,Jing-Wei LI~1,Xu-Chu WENG~(1,*) 1 laboratory for Higher Brain Functions,institute of Psychology,chinese academy of sciences,beijing 100101,china 2 Graduate School,institute of Psychology,chinese academy of sciences,beijing 100101,china 3 key laboratory for Neurolnformation of Ministry of Education,School of Life Science and technology,University of Electronic Science and technology of china,Chengdu 610054,china

＜正＞Objective Recent evidence from functional MRI studies suggests that the perception of pain in others activates similar neural circuits as the first-hand experience of pain,especially in regions involving the affective-motivational dimension of pain,such as the insula and the anterior cingulate *** aim of the present study was to investigate the spatio-temporal dynamics of neural activities involved in empathy for *** Event-related brain potentials（ERPs） were recorded in healthy male adults while they were viewing pictures either containing painful or neutral information and performing a pain judgment task that required attention to pain cues in the stimuli or a counting task that withdrew their attention from these *** The ERP results showed early differentiation between painful and neutral stimuli over the frontal lobe at 180 ms after sensory stimulation.A long latency empathic response was observed after 380 ms over the frontal-central-parietal regions,which was more salient over the left than right *** sLORETA source analysis results of the contrast between judging painful pictures and counting neutral pictures,presumably reflecting activities involved in empathic processing,showed increased activation in parahippocampal gyrus and amygdala from 200ms to 275 ms,the primary somatosensory cortex（S 1） and secondary somatosensory cortex（S2） from 475 ms to 665 ms,left insula from 515 ms to 655 ms,and ACC and PCC from 605ms to 635ms after *** identify the role of task demand in producing neural response related to pain empathy,we made another sLORETA analysis contrast between judging and counting painful pictures,increased activation was observed in bilateral S1 and S2 from 475 ms to 685 ms,and ACC from 595ms to 635ms after *** The ERP results support a model of empathy for pain consisting of early emotional sharing and late cognitive evaluation,while the source analysis results show spatio-temporal d

关键词： empathy pain perception ERP sLORETA insula cingulate cortex

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2024年第4期13卷 539-547页

作者： Kun wang Chao liu Yuan Zhang Fuyu Lv Jun Ouyang Houbing Huang Rui-Long Yang Yu-Yao zhao Hongbo Cheng Hanfei Zhu Xiaoming Shi Yun Tian institute of Advanced Energy Materials and Chemistry Jinan Engineering Laboratory for Multi-scale Functional MaterialsSchool of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China key laboratory for Liquid-Solid Structure Evolution and processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China china Tobacco Shandong Industrial Co. Ltd.Jinan 250104China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China key laboratory of key Film Materials&application for Equipments(Hunan Province) School of Material Sciences and EngineeringXiangtan UniversityXiangtan 411105China Advanced Research institute of Multidisciplinary Science and School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China key laboratory of Magnetic Molecules and Magnetic information Materials of Ministry of Education School of Chemistry and Materials ScienceShanxi Normal UniversityTaiyuan 030032China

To meet the expectation set by Moore’s law on transistors,the search for thickness-scalable high dielectric constant(k)gate layers has become an emergent research *** investigations have failed to solve the“polarizability–scalability–insulation robustness”*** this work,we show that this trilemma can be solved by using a gate layer of a high k ferroelectric oxide in its superparaelectric(SPE)*** the SPE,its polar order becomes local and is dispersed in an amorphous matrix with a crystalline size down to a few nanometers,leading to an excellent dimensional scalability and a good field-stability of the k *** an example,a stable high k value(37±3)is shown in ultrathin SPE films of(Ba_(0.95),Sr_(0.05))(Zr_(0.2),Ti_(0.8))O_(3)deposited on LaNiO_(3)-buffered Pt/Ti/SiO_(2)/(100)Si down to a 4 nm thickness,leading to a small equivalent oxide thickness of~0.46 *** aforementioned characteristic microstructure endows the SPE film a high breakdown strength(~10.5 MV·cm^(−1)for the 4 nm film),and hence ensures a low leakage current for the operation of the complementary metal oxide semiconductor(CMOS)***,a high electrical fatigue resistance is displayed by the SPE *** results reveal a great potential of superparaelectric materials as gate dielectrics in the next-generation microelectronics.

关键词： high-k transistors Moore's law superparaelectric insulation robustness

A Localization Method of High Energy Transients for All-sky Gamma-ray Monitor

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第10期24卷 25-35页

作者： Yi zhao wangchen Xue Shaolin Xiong Qi Luo Yuanhao wang Jiacong liu Heng Yu Xiaoyun zhao Yue Huang Jinyuan Liao Jianchao Sun Xiaobo Li Qibin Yi Ce Cai Shuo Xiao Shenglun Xie Chao Zheng Yanqiu Zhang Chenwei wang Wenjun Tan Zhiwei Guo Chaoyang Li Zhenghua An Gang Chen Yanqi Du Min Gao Ke Gong Dongya Guo Jiang He Jianjian He Bing Li Gang Li Xinqiao Li Jing Liang Xiaohua Liang Yaqing liu Xiang Ma Rui Qiao Liming Song Xinying Song Xilei Sun Jin wang Ping wang Xiangyang Wen Hong Wu Yanbing Xu Sheng Yang Dali Zhang Fan Zhang Hongmei Zhang Peng Zhang Shu Zhang Zhen Zhang Shijie Zheng Keke Zhang Xingbo Han Haiyan Wu Hu Tai Hao geng Gaopeng Lu Wei Xu Fanchao Lyu Hongbo Zhang Fangjun Lu Shuangnan Zhang Department of Astronomy Beijing Normal UniversityBeijing 100875China key laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of chinese academy of sciences Beijing 100049China School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China College of Physics Hebei Normal UniversityShijiazhuang 050024China Guizhou Provincial key laboratory of Radio Astronomy and Data processing Guizhou Normal UniversityGuiyang 550001China School of Physics and Electronic Science Guizhou Normal UniversityGuiyang 550001China institute of Astrophysics Central China Normal UniversityWuhan 430079China College of physics sciences technology Hebei UniversityBaoding 071002China Physics and Space Science College China West Normal UniversityNanchong 637002China School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China College of Electronic and information Engineering Tongji UniversityShanghai 201804China Innovation academy for Microsatellites of chinese academy of sciences Shanghai 201304China National Space Science Center Chinese Academy of SciencesBeijing 100190China School of Earth and Space sciences University of Science and Technology of ChinaHefei 230026China Electronic information School Wuhan UniversityWuhan 430072China key laboratory of Transportation Meteorology of china Meteorological Administration Nanjing Joint Institute for Atmospheric SciencesNanjing 210000China key laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

Fast and reliable localization of high-energy transients is crucial for characterizing the burst properties and guiding the follow-up *** based on the relative counts of different detectors has been widely used for all-sky gamma-ray *** are two major methods for this count distribution localization:χ^(2)minimization method and the Bayesian *** we propose a modified Bayesian method that could take advantage of both the accuracy of the Bayesian method and the simplicity of the χ^(2)*** comprehensive simulations,we find that our Bayesian method with Poisson likelihood is generally more applicable for various bursts than the χ^(2)method,especially for weak *** further proposed a location-spectrum iteration approach based on the Bayesian inference,which could alleviate the problems caused by the spectral difference between the burst and location *** method is very suitable for scenarios with limited computation resources or timesensitive applications,such as in-flight localization software,and low-latency localization for rapidly follow-up observations.

关键词： methods:data analysis methods:analytical (stars:)gamma-ray burst:general

Diffusion-Free All-Solid-State Batteries Enabled by an Ionic/Electronic Dual-Conductive Anode

在线全文

学校读者我要写书评

暂无评论

Renewables 2024年第3期2卷 194-203页

作者： Yue Ji Zaifa wang Changtai zhao Zhiqiang Fang Yue Gong Qihang Jing Yu Xia Tengjiao Luan Yingying Jiang Jianwen Liang Xiaona Li Mengdi zhao Ximin Zhai Xiaofei Bie Tao Jiang Dongsheng geng Xueliang Sun School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083 Solid State Batteries Research Center GRINM(Guangdong)Institute for Advanced Materials and TechnologyFoshan 528051 china Automotive Battery Research institute Co.Ltd. Beijing 100088 china FAW Corporation Limited Changchun 130013 key laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Jilin UniversityChangchun 130025 Eastern institute for Advanced Study Eastern Institute of TechnologyNingbo 315200 School of Chemistry and Materials Science Nanjing University of Information Science&TechnologyNanjing 210044

Silicon(Si)is one of the most promising anodes for enabling all-solid-state batteries(ASSBs)with high energy density and ***,the tremendous volume change and sluggish kinetics result in poor electrochemical ***,we proposed an ionic/electronic dual-conductive material of Li_(x)Si as a diffusion-rapid and all-active anode for *** with pure Si anode,the as-fabricated Li_(x)Si showed dramatic promotions of 35 times electronic and 400 times ionic *** three-dimensional(3D)ionic-electronic transport system of Li_(x)Si enabled rapid kinetics and uniform volume change of electrode materials in the whole electrode,corresponding to a lower volumechange *** a result,the ASSBs with LiCoO_(2)cathode exhibited a reversible discharge capacity of 154.4 mAh g−1,corresponding to an initial Coulombic efficiency of 97.3%.Besides,the batteries delivered a high rate capacity of 99.3 mAh g^(−1)at 2 C and long-term cycle stability of 94.0%after 800 cycles at 1 C,which was much better than the pure Si *** study sheds light on a new understanding of the importance of ionic conductivity for Si-based anode and might help inspire the design of advanced anode materials for ASSBs.

关键词： all-solid-state batteries lithium silicon anodes interface stability ionic-electronic conductors long-term cycling performance

Multi-Step Ahead Fault Prediction Method Based on PCA and EMD

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Multi-Step Ahead Fault Prediction Method Based on PCA and EM...

2011 chinese Control and Decision Conference（CCDC）

作者： Shu wang1,2,Zhen zhao3,Fuli wang1,2,Yuqing Chang1,2 1.key laboratory of Integrated Automation of Process Industry,Ministry of Education,Northeastern University,Shenyang,110004 2.School of information Science & Engineering,Northeastern University,Shenyang 110004,china 3.School of information & Control Engineering,Liaoning University of Petroleum & Chemical technology,Fushun,113001,china.

In recent years,fault prediction method,which means forecast process fault in an early time based on the current condition of the system,has attracted more and more attention by companies and ***,it still has many problems in this area,especially for its application in industrial *** the present work,a multi-step ahead fault prediction method combining principle component analysis,empirical mode decomposition and extreme learning machine are developed to realize early prediction of *** application of the presented method is illustrated with respect to simulated data collected from the Tennessee Eastman *** experimental results demonstrate the effectiveness of the proposed method.

关键词： fault prediction principle component analysis (PCA) empirical mode decomposition (EMD) extreme learning machine (ELM) fault diagnosis signal processing

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

基于特征值的无可信中心的秘密共享方案研究

电子与信息学报 2018年第11期40卷 2752-2757页

作者：张艳硕李文敬赵耿王庆瑞毕伟杨涛北京电子科技学院北京100070 工业安全与应急技术安徽省重点实验室(合肥工业大学) 合肥230009 公安部第三研究所上海201204 中思博安科技(北京)有限公司北京100195

利用矩阵特征值的特性,该文提出新的无可信中心的秘密共享方案。该方案无需可信中心的参与,每个参与者提供相同的秘密份额(列向量),在黑盒子中协同产生各自的秘密份额,从而避免可信中心的权威欺骗。所有参与者提供的列向量组成一个可逆... 详细信息

利用矩阵特征值的特性,该文提出新的无可信中心的秘密共享方案。该方案无需可信中心的参与,每个参与者提供相同的秘密份额(列向量),在黑盒子中协同产生各自的秘密份额,从而避免可信中心的权威欺骗。所有参与者提供的列向量组成一个可逆矩阵P,可逆矩阵P和对角矩阵生成一个矩阵M,并将该矩阵正交化的单位特征向量,作为子密钥分发给各参与者。由于同一个集合的参与者所对应的特征值是相同的,该方案可以有效地防止成员之间的恶意欺诈行为。分析结果表明,该方案是可行的、安全的。

关键词：秘密共享特征值可信中心黑盒子

在线全文

学校读者我要写书评

暂无评论

基于超表面和MEMS的结构光投影芯片研究

中国激光 2024年第6期51卷 254-266页

作者：翟雷应赵礼宇王义杰南敬昌辽宁工程技术大学电子与信息工程学院辽宁葫芦岛125105 辽宁省无线射频大数据智能应用重点实验室辽宁葫芦岛125105

结构光三维成像中广泛使用的数字光处理(DLP)投影仪存在结构复杂、设备体积大及投影非线性等问题,制约了结构光三维成像在高探测精度、小探测场景领域的应用。提出了一种集成超表面阵列和微机电系统(MEMS)二维扫描平台的结构光投影芯片... 详细信息

结构光三维成像中广泛使用的数字光处理(DLP)投影仪存在结构复杂、设备体积大及投影非线性等问题,制约了结构光三维成像在高探测精度、小探测场景领域的应用。提出了一种集成超表面阵列和微机电系统(MEMS)二维扫描平台的结构光投影芯片设计。设计了基于几何相位原理的超表面阵列,用于生成格雷码和相移法混合编码结构光条纹。通过二维扫描平台突破单一静态超表面的限制,实现了基于时间编码的结构光条纹投影。结果表明:所设计的超表面结构对入射光具有良好的线性相位调制能力,光源转换效率为88.61%;生成的相移条纹符合正弦分布特性,很好地解决了DLP投影非线性问题;产生的条纹宽度均匀,最小宽度为2 mm,探测精度可达亚毫米级。有限元分析结果表明:所设计的二维平台的最小模态频率为511.91 Hz,抗干扰能力强,响应时间为2.4 ms,帧率为333 Hz,投影速率高。芯片尺寸为3 mm×3 mm。最后设计了芯片的集成制造工艺流程,为高探测精度、高投影速率微型化投影设备的制造提供了理论模型和系统解决方案。

关键词：表面光学结构光三维成像超表面微机电系统

时空多尺度关联特征融合的二维卷积网络细粒度动作识别模型

在线全文

学校读者我要写书评

暂无评论

高技术通讯 2024年第6期34卷 590-601页

作者：胡正平王昕宇董佳伟赵艳霜刘洋燕山大学信息科学与工程学院秦皇岛066004 燕山大学河北省信息传输与信号处理重点实验室秦皇岛066004

针对传统二维(2D)卷积网络提取时空特征尺度单一以及对细粒度动作数据集中帧与帧之间的远程时间关联信息利用不足的问题,本文提出时空多尺度关联特征融合的2D卷积网络细粒度动作识别模型。首先,为建模视频多尺度空间关联以加强对细粒度... 详细信息

针对传统二维(2D)卷积网络提取时空特征尺度单一以及对细粒度动作数据集中帧与帧之间的远程时间关联信息利用不足的问题,本文提出时空多尺度关联特征融合的2D卷积网络细粒度动作识别模型。首先,为建模视频多尺度空间关联以加强对细粒度视频数据的空间表征能力,模型使用多尺度“特征压缩、特征激发”方式,使网络所提取空间特征更加丰富有效。然后,为充分利用细粒度视频数据时间维度上的运动信息,本文引入时间窗口自注意力机制,利用自注意力机制强大的远程依赖建模能力同时只在时间维度上进行自注意力操作,以较低计算成本建模远程时间依赖关系。最后,考虑到所提取时空特征对不同类型动作分类的贡献不均等,本文引入自适应特征融合模块,为特征动态赋予不同权重实现自适应特征融合。模型在2个细粒度动作识别数据集Diving48和Something-somethingV1上识别准确率分别达到86.0%和46.9%,分别使原始主干网络识别准确率提升3.8%和1.3%。实验结果表明,在只使用视频帧信息作为输入的情况下,本模型达到与现有基于Transformer和三维卷积神经网络(3D CNN)算法相当的识别准确率。

关键词：细粒度动作识别多尺度时空关联特征远程依赖建模自注意力机制