检索结果-南通市图书馆

The In-Flight realtime Trigger and Localization Software of GECAM

research in Astronomy and Astrophysics 2024年第10期24卷 11-24页

作者： Xiao-Yun Zhao Shao-Lin Xiong Xiang-Yang Wen Xin-Qiao Li Ce Cai Shuo Xiao Qi Luo Wen-Xi peng Dong-Ya Guo Zheng-Hua An Ke Gong Jin-Yuan Liao Yan-Qiu Zhang Yue Huang Lu Li Xing Wen Fei Zhang Jing duan Chen-Wei Wang Dong-Li Shi peng Zhang Qi-Bin Yi Chao-Yang Li Yan-Bing Xu Xiao-Hua Liang Ya-Qing Liu Da-Li Zhang Xi-lei Sun Fan Zhang Gang Chen Huan-Yu Wang Sheng Yang Xiao-Jing Liu Min Gao Mao-Shun Li Jin-Zhou Wang Xing Zhou Yi Zhao Wang-Chen Xue Chao Zheng Jia-Cong Liu Xing-Bo Han Jin-Ling Qi Jia Huang Ke-Ke Zhang Can Chen Xiong-Tao Yang Dong-Jie Hou Yu-Sa Wang rui Qiao Xiang Ma Xiao-Bo Li ping Wang Xin-Ying Song Li-Ming Song Shi-Jie Zheng Bing Li Hong-Mei Zhang Yue Zhu Wei Chen Jian-Jian He Zhen Zhang Jin Hou Hong-Jun Wang Yan-Chao Hao Xiang-Yu Wang Zong-Yuan Yang Zhi-Long Wen Zhi Chang Yuan-Yuan du rui Gao Xiao-Fei Lan Yan-Guo Li Gang Li Xu-Fang Li Fang-Jun Lu Hong Lu Bin Meng Feng Shi Hui Wang Hui-Zhen Wang Yu-peng Xu Jia-Wei Yang Xue-Juan Yang Shuang-Nan Zhang Chao-Yue Zhang Cheng-Mo Zhang Zhi-Cheng Tang Cheng Cheng Key Laboratory of particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China university of Chinese Academy of sciences Chinese Academy of SciencesBeijing 100049China school of Information science and Technology Southwest Jiaotong UniversityChengdu 611756China Key Laboratory of Stellar and Interstellar physics and Department of physics Xiangtan UniversityXiangtan 411105China physics and Space science College China West Normal UniversityNanchong 637002China Department of Astronomy Beijing Normal UniversityBeijing 100875China Innovation Academy for Microsatellites of CAS Shanghai 201203China Changchun university of science and Technology Changchun 130022China Chinese Academy of sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China

realtime trigger and localization of bursts are the key functions of GECAM,an all-sky gamma-ray monitor launched on 2020 December *** developed a multifunctional trigger and localization software operating in the CpU of the GECAM electronic *** onboard software has the following features:high trigger efficiency for real celestial bursts with a suppression of false triggers caused by charged particle bursts and background fluctuation,dedicated localization algorithm optimized for both short and long bursts,and low time latency of the trigger information which is downlinked through the Global Short Message Communication service of the global BeiDou navigation *** paper provides a detailed description of the design and development of the trigger and localization software system for *** covers the general design,workflow,the main functions,and the algorithms used in the *** paper also includes on-ground trigger tests using simulated gamma-ray bursts generated by a dedicated X-ray tube,as well as an overview of the performance for real celestial bursts during its in-orbit operation.

关键词： telescopes instrumentation:detectors methods:observational

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Two-dimensional materials for future information technology: status and prospects

引用

science china(Information sciences) 2024年第6期67卷 1-147页

作者： Hao QIU Zhihao YU Tiange ZHAO Qi ZHANG Mingsheng XU peifeng LI Taotao LI Wenzhong BAO Yang CHAI Shula CHEN Yiqi CHEN Hui-Ming CHENG Daoxin DAI Zengfeng DI Zhuo DONG Xidong duAN Yuhan FENG Yu FU Jingshu GUO pengwen GUO Yue HAO Jun HE Xiao HE Jingyi HU Weida HU Zehua HU Xinyue HUANG Ziyang HUANG Ali IMrAN Ziqiang KONG Jia LI Qian LI Weisheng LI lei LIAO Bilu LIU Can LIU Chunsen LIU Guanyu LIU Kaihui LIU Liwei LIU Sheng LIU Yuan LIU Donglin LU Likuan MA Feng MIAO Zhenhua NI Jing NING Anlian pAN Tian-Ling rEN Haowen SHU Litao SUN Yue SUN Quanyang TAO Zi-Ao TIAN Dong WANG Hao WANG Haomin WANG Jialong WANG Junyong WANG Wenhui WANG Xingjun WANG Yeliang WANG Yuwei WANG Zhenyu WANG Yao WE... school of electronic science and engineering Nanjing University school of Integrated Circuits Interdisciplinary Research Center for Future Intelligent Chips (Chip-X)Nanjing University school of Integrated Circuit science and engineering Nanjing University of Posts and Telecommunications State Key Laboratory of Infrared physics Shanghai Institute of Technical Physics Chinese Academy of Sciences school of physics and Key Lab of Quantum Materials and Devices of the Ministry of Education School of Electronic Science & EngineeringSoutheast University College of Integrated Circuits State Key Laboratory of Silicon and Advanced Semiconductor MaterialsZhejiang University Suzhou Laboratory State Key Laboratory of Integrated Chips and Systems School of MicroelectronicsFudan University Shaoxin Laboratory Department of Applied physics The Hong Kong Polytechnic University Key Laboratory for Micro-Nano physics and Technology of Hunan province College of Materials Science and EngineeringHunan University College of Integrated Circuits Zhejiang University Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Layered Materials for Value-Added ApplicationsTsinghua-Berkeley Shenzhen Institute & Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua University State Key Laboratory of Extreme photonics and instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZijingang CampusZhejiang University National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO)Chinese Academy of Sciences College of Chemistry and Chemical engineering Hunan University Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education) Department of PhysicsRenmin University of China school

Over the past 70 years, the semiconductor industry has undergone transformative changes,largely driven by the miniaturization of devices and the integration of innovative structures and materials. Two-dimensional(2D) materials like transition metal dichalcogenides(TMDs) and graphene are pivotal in overcoming the limitations of silicon-based technologies, offering innovative approaches in transistor design and functionality, enabling atomic-thin channel transistors and monolithic 3D integration. We review the important progress in the application of 2D materials in future information technology, focusing in particular on microelectronics and optoelectronics. We comprehensively summarize the key advancements across material production, characterization metrology, electronic devices, optoelectronic devices, and heterogeneous integration on silicon. A strategic roadmap and key challenges for the transition of 2D materials from basic research to industrial development are outlined. To facilitate such a transition, key technologies and tools dedicated to 2D materials must be developed to meet industrial standards, and the employment of AI in material growth, characterizations, and circuit design will be essential. It is time for academia to actively engage with industry to drive the next 10 years of 2D material research.

关键词： two-dimensional (2D) materials information technology production technology standardization of characterization microelectronicdevices optoelectronic devices multi-functional integration

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Movable electrowetting optofluidic lens for optical axial scanning in microscopy

引用

opto-electronic Advances 2019年第2期2卷 10-14页

作者： lei Li Liang Xiao Jinhui Wang Qionghua Wang school of electronics and Information engineering Sichuan University Chengdu 610065 China school of instrumentation science and opto-electronics engineering Beihang University Beijing 100191 China

Optical axial scanning is essential process to obtain 3D information of biological specimens. To realize optical axial scanning without moving, the tunable lens is a solution. However, the conventional tunable lenses usually induce non-uniform magnification and resolution issues. In this paper, we report a movable electrowetting optofluidic lens. Unlike the conventional tunable lens, our proposed optofluidic lens has two liquid-liquid (L-L) interfaces, which can move in the cell by an external voltage. The object distance and image distance are adjusted by shifting the L-L interface position. Therefore, the proposed lens can realize optical axial scanning with uniform magnification and resolution in microscopy. To prove the concept, we fabricate an optofluidic lens and use it in optical axial scanning. The scanning distance is more than 1 mm with uniform magnification and good imaging quality. Widespread application of such a new adaptive zoom lens is foreseeable.

关键词： optofluidic lens liquid lens zoom system

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Distinct superconducting behaviors of pressurized WB2 and reB2 with different local B layers

引用

science china(physics,Mechanics & Astronomy) 2022年第8期65卷 121-128页

作者： Cuiying pei Jianfeng Zhang Chunsheng Gong Qi Wang Lingling Gao Yi Zhao Shangjie Tian Weizheng Cao Changhua Li Zhong-Yi Lu Hechang lei Kai Liu Yanpeng Qi school of physical science and Technology ShanghaiTech UniversityShanghai201210China Department of physics and beijing Key Laboratory of opto-electronic Functional Materials&Micro-nano Devices Renmin University of ChinaBeijing100872China ShanghaiTech Laboratory for Topological physics ShanghaiTech UniversityShanghai201210China Shanghai Key Laboratory of High-resolution Electron Microscopy ShanghaiTech UniversityShanghai201210China

The recent discovery of superconductivity up to 32 K in the pressurized MoBreignites the interest in exploring high-Tc superconductors in transition-metal diborides. Inspired by that work, we turn our attention to the 5 d transition-metal *** we systematically investigate the responses of both structural and physical properties of WBand reBto external pressure,which possess different types of boron layers. Similar to MoB, the pressure-induced superconductivity was also observed in WBabove 60 Gpa with a maximum Tcof 15 K at 100 Gpa, while no superconductivity was detected in reBin this pressure range. Interestingly, the structures at ambient pressure for both WBand reBpersist to high pressure without structural phase transitions. Theoretical calculations suggest that the ratio of flat boron layers in this class of transition-metal diborides may be crucial for the appearance of high Tc. The combined theoretical and experimental results highlight the effect of the geometry of boron layers on superconductivity and shed light on the exploration of novel high-Tcsuperconductors in borides.

关键词： superconductivity high pressure diborides

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于双流Faster r-CNN的像素级图像拼接篡改定位算法

引用

电子测量与仪器学报 2021年第4期35卷 154-160页

作者：吴鹏陈北京郑雨鑫高野南京信息工程大学计算机与软件学院南京210044 江苏省计算机网络技术重点实验室南京210096 南京信息工程大学江苏省大气环境与装备技术协同创新中心南京210044

基于双流Faster r-CNN的图像拼接篡改定位算法因综合考虑彩色图像及其噪声图像作为输入而获得良好性能。但是,它仍存在两个不足,定位精度只是块级且经过隐写分析富模型产生的噪声图易夹杂大量冗余非篡改区域信息。为此,提出一种基于双流... 详细信息

基于双流Faster r-CNN的图像拼接篡改定位算法因综合考虑彩色图像及其噪声图像作为输入而获得良好性能。但是,它仍存在两个不足,定位精度只是块级且经过隐写分析富模型产生的噪声图易夹杂大量冗余非篡改区域信息。为此,提出一种基于双流Faster r-CNN的像素级拼接篡改定位模型。针对第一个缺陷,增加一个全卷积网络分支实现像素级定位。针对第二个缺陷,采用错误等级分析噪声模型替代隐写分析富模型用于提取噪声图。实验结果表明提出算法较现有算法提高了近10%的准确率。

关键词：图像拼接 Faster r-CNN 错误等级分析特征金字塔全卷积神经网络

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于多尺度残差神经网络的阿尔茨海默病诊断分类

引用

山东大学学报（工学版） 2018年第6期48卷 1-7,18页

作者：刘振丙方旭升杨辉华蓝如师桂林电子科技大学电子工程与自动化学院广西桂林541000 北京邮电大学自动化学院北京100876

提出多尺度残差神经网络(multi-scale resnet,MSresnet)。采用不同大小的卷积核对图像进行多尺度信息采集,并对神经网络进行残差学习,避免网络退化。对核磁共振图像(magnetic resonance imaging,MrI)进行标准化处理,利用MSresnet模型在... 详细信息

提出多尺度残差神经网络(multi-scale resnet,MSresnet)。采用不同大小的卷积核对图像进行多尺度信息采集,并对神经网络进行残差学习,避免网络退化。对核磁共振图像(magnetic resonance imaging,MrI)进行标准化处理,利用MSresnet模型在阿尔茨海默症(Alzheimer's disease,AD)和正常受试者(normal control,NC)获得的分类准确率为99. 41%,在AD和轻度认知障碍(mild cognitive impairment,MCI)获得分类准确率为97. 35%。与已有的算法相比,本研究提出的算法的分类准确率得到了明显的提高。

关键词：多尺度残差神经网络核磁共振图像阿尔茨海默病灰度标准化

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The fundamental performance of FAST with 19-beam receiver at L band

引用

research in Astronomy and Astrophysics 2020年第5期20卷 65-92页

作者： peng Jiang Ning-Yu Tang Li-Gang Hou Meng-Ting Liu Marko Krco lei Qian Jing-Hai Sun Tao-Chung Ching Bin Liu Yan duan You-Ling Yue Heng-Qian Gan rui Yao Hui Li Gao-Feng pan Dong-Jun Yu Hong-Fei Liu Di Li Bo peng Jun Yan FAST Collaboration National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China CAS Key Laboratory of FAST National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China school of Astronomy and Space science University of Chinese Academy of SciencesBeijing 100101China

The Five-hundred-meter Aperture Spherical radio Telescope(FAST) has passed national acceptance and finished one pilot cycle of ‘Shared-risk’ observations. It will start formal operation soon. In this context, this paper describes testing results of key fundamental parameters for FAST, aiming to provide basic support for observation and data reduction of FAST for scientific researchers. The 19-beam receiver covering 1.05–1.45 GHz was utilized for most of these observations. The fluctuation in electronic gain of the system is better than 1% over 3.5 hours, enabling enough stability for observations. pointing accuracy,aperture efficiency and system temperature are three key parameters for FAST. The measured standard deviation of pointing accuracy is 7.9′′, which satisfies the initial design of FAST. When zenith angle is less than 26.4°, the aperture efficiency and system temperature around 1.4 GHz are ~0.63 and less than 24 K for central beam, respectively. The sensitivity and stability of the 19-beam backend are confirmed to satisfy expectation by spectral HI observations toward NGC 672 and polarization observations toward 3 C 286. The performance allows FAST to take sensitive observations for various scientific goals, from studies of pulsars to galaxy evolution.

关键词： instrumentation:detectors line:profiles

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Electrically programmable phase-change photonic memory for optical neural networks with nanoseconds in situ training capability

引用

Advanced photonics 2023年第4期5卷 42-50页

作者： Maoliang Wei Junying Li Zequn Chen Bo Tang Zhiqi Jia peng Zhang Kunhao lei Kai Xu Jianghong Wu Chuyu Zhong Hui Ma Yuting Ye Jialing Jian Chunlei Sun ruonan Liu Ying Sun Wei.E.I.Sha Xiaoyong Hu Jianyi Yang Lan Li Hongtao Lin Zhejiang university College of Information Science and Electronic EngineeringState Key Laboratory of Modern Optical InstrumentationKey Laboratory of Micro-Nano Electronics and Smart System of Zhejiang ProvinceHangzhouChina Westlake university School of EngineeringKey Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang ProvinceHangzhouChina Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhouChina Institute of Microelectronics of the Chinese Academy of sciences BeijingChina peking university School of PhysicsFrontiers Science Center for Nano-optoelectronicsState Key Laboratory for Mesoscopic PhysicsBeijingChina

Optical neural networks (ONNs), enabling low latency and high parallel data processing withoutelectromagnetic interference, have become a viable player for fast and energy-efficient processing andcalculation to meet the increasing demand for hash rate. photonic memories employing nonvolatile phase-change materials could achieve zero static power consumption, low thermal cross talk, large-scale, andhigh-energy-efficient photonic neural networks. Nevertheless, the switching speed and dynamic energyconsumption of phase-change material-based photonic memories make them inapplicable for in situ ***, by integrating a patch of phase change thin film with a pIN-diode-embedded microring resonator,a bifunctional photonic memory enabling both 5-bit storage and nanoseconds volatile modulation wasdemonstrated. For the first time, a concept is presented for electrically programmable phase-changematerial-driven photonic memory integrated with nanosecond modulation to allow fast in situ training and zerostatic power consumption data processing in ONNs. ONNs with an optical convolution kernel constructedby our photonic memory theoretically achieved an accuracy of predictions higher than 95% when testedby the MNIST handwritten digit database. This provides a feasible solution to constructing large-scalenonvolatile ONNs with high-speed in situ training capability.

关键词： phase-change materials optical neural networks photonic memory silicon photonics reconfigurable photonics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

半主动式激光导引头光学系统设计

引用

国外电子测量技术 2019年第5期38卷 109-113页

作者：蒲小琴董全林杜亚雯北京航空航天大学仪器科学与光电工程学院

半主动式激光导引头是当今导航制导武器的重要组成部分。阐述了激光导引头的工作原理,基于已有的光学系统及系统指标要求设计了导引头的光学系统,该光学系统主要由接收光学透镜组合及四象限探测器两部分组成。根据导引头的探测距离、接... 详细信息

半主动式激光导引头是当今导航制导武器的重要组成部分。阐述了激光导引头的工作原理,基于已有的光学系统及系统指标要求设计了导引头的光学系统,该光学系统主要由接收光学透镜组合及四象限探测器两部分组成。根据导引头的探测距离、接收通光孔径、畸变等系统性能技术指标,对激光成像光斑直径大小及光斑中心位置范围进行了仿真计算。利用CODE-V软件建立了光学系统模型,对光学系统进行了优化设计,并通过痕迹图、点列图、畸变、径向包围能量曲线等对光斑质量进行了优化评价,最终设计出的光学系统满足系统要求且光斑成像质量良好,系统畸变小于0.5%,调整字体大小具体光学参数为入瞳直径D=32mm,像方数F=0.63,系统焦距为20.27mm,系统总长度为31.77mm。

关键词：导航制导激光导引头光学透镜组合光斑质量

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

应用于压电快反镜的高性能角度传感器设计

引用

北京信息科技大学学报（自然科学版） 2021年第5期36卷 33-38,44页

作者：刘蕾王艳林刘力双北京信息科技大学仪器科学与光电工程学院北京100192

压电快反镜系统中,反射镜的偏角测量精度是影响系统执行精度的关键。设计了一种基于直流电桥的电阻式角度传感器,采用低通滤波器和高精密仪表放大电路对微弱的电信号进行精准放大;采用单端—差分放大器构成AD驱动电路,将单端信号做进一... 详细信息

压电快反镜系统中,反射镜的偏角测量精度是影响系统执行精度的关键。设计了一种基于直流电桥的电阻式角度传感器,采用低通滤波器和高精密仪表放大电路对微弱的电信号进行精准放大;采用单端—差分放大器构成AD驱动电路,将单端信号做进一步差分放大处理,从而为A/D转换提供低噪声精准模拟输入,最后搭建电路系统进行性能测试。实验结果表明,角度传感器能实现1.59μrad的角度分辨率,非线性误差小于0.06%,且波动小,满足压电快反镜系统对角度传感器的性能指标要求。

关键词：压电快反镜电阻应变式传感器压电陶瓷微弱信号

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：