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CEPC Technical Design Report

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Radiation Detection technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed Xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai Yu Bai Yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci Xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua cai Wenyong cai Wujun cai Yijian cai Yizhou cai Yuchen cai Haiying cai Huacheng cai Lorenzo Calibbi Junsong Cang Guofu Cao Jianshe Cao Antoine Chance Xuejun Chang Yue Chang Zhe Chang Xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che Yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen Guoming Chen Hua-Xing Chen Huirun Chen Jinhui Chen Ji-Yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen Shiqiang Chen Tianlu Chen Wei Chen Xiang Chen Xiaoyu Chen Xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen Yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng Huajie Cheng Shan Cheng Tongguang Cheng Yunlong Chi Pietro Chimenti Wen Han Chiu Guk Cho Ming-Chung Chu Xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui Xiaohao Cui Zhaoyuan Cui Brunella D'Anzi Ling-Yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong Jianin AGH university of science and technology Faculty of Physics and Applied Computer ScienceKrakow Anhui university HefeiAnhui Applied Physics department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu university Institute of ScienceVaranasi Bandirma Onyedi Eylul university Bandirma Beihang university Beijing Beijing Computational science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of technology Beijing Beijing Normal university Beijing Brown university ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad university Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech cairo university Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central China Normal university WuhanHubei Central South university ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan China academy of engineering physics MianyangSichuan China building materials academy Beijing China Center of Advanced science and technology Beijing China Institute of Atomic Energy Beijing China Jiliang university HangzhouZhejiang China Nuclear Instrument CO. LTDBeijing China university of Geosciences Beijing China university of Geosciences WuhanHubei China university of Mining and technology XuzhouJiangsu China West Normal university NanchongSichuan Chongqing university Department of PhysicsChongqing Chulalongkorn university Bangkok City university of Hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell university IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu university DalianLiaoning Dalian university of technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East China university Of science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise

基于无锚框的目标检测方法及其在复杂场景下的应用进展

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自动化学报 2023年第7期49卷 1369-1392页

作者：刘小波肖肖王凌蔡之华龚鑫郑可心中国地质大学(武汉)自动化学院武汉430074 复杂系统先进控制与智能自动化湖北省重点实验室武汉430074 地球探测智能化技术教育部工程研究中心武汉430074 地质探测与评估教育部重点实验室中国地质大学(武汉)武汉430074 清华大学自动化系北京100084 中国地质大学(武汉)计算机学院武汉430074

基于深度学习的目标检测方法是目前计算机视觉领域的热点,在目标识别、跟踪等领域发挥了重要的作用.随着研究的深入开展,基于深度学习的目标检测方法主要分为有锚框的目标检测方法和无锚框的目标检测方法,其中无锚框的目标检测方法无需... 详细信息

基于深度学习的目标检测方法是目前计算机视觉领域的热点,在目标识别、跟踪等领域发挥了重要的作用.随着研究的深入开展,基于深度学习的目标检测方法主要分为有锚框的目标检测方法和无锚框的目标检测方法,其中无锚框的目标检测方法无需预定义大量锚框,具有更低的模型复杂度和更稳定的检测性能,是目前目标检测领域中较前沿的方法.在调研国内外相关文献的基础上,梳理基于无锚框的目标检测方法及各场景下的常用数据集,根据样本分配方式不同,分别从基于关键点组合、中心点回归、Transformer、锚框和无锚框融合等4个方面进行整体结构分析和总结,并结合COCO(Common objects in context)数据集上的性能指标进一步对比.在此基础上,介绍了无锚框目标检测方法在重叠目标、小目标和旋转目标等复杂场景情况下的应用,聚焦目标遮挡、尺寸过小和角度多等关键问题,综述现有方法的优缺点及难点.最后对无锚框目标检测方法中仍存在的问题进行总结并对未来发展的应用趋势进行展望.

关键词：无锚框关键点中心点 Transformer 复杂场景目标检测

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一种分布式持久性内存文件系统的一致性机制

计算机研究与发展 2020年第3期57卷 660-667页

作者：陈波陆游游蔡涛陈游旻屠要峰舒继武江苏大学计算机科学与通信工程学院江苏镇江212013 清华大学计算机科学与技术系北京100084 中兴通讯股份有限公司南京210012

持久性内存(persistent memory,PM)和远程直接内存访问(remote direct memory access,RDMA)具有高带宽、低延迟的硬件性能,这为设计高性能的分布式存储系统提供了新的机遇.然而,它们这些新的特性为高效的数据一致性管理引出了诸多问题:... 详细信息

持久性内存(persistent memory,PM)和远程直接内存访问(remote direct memory access,RDMA)具有高带宽、低延迟的硬件性能,这为设计高性能的分布式存储系统提供了新的机遇.然而,它们这些新的特性为高效的数据一致性管理引出了诸多问题:一方面,持久性内存数据一致性依赖于CPU主动执行硬件指令刷写缓存实现,而这类指令开销极高,严重影响CPU处理性能;另一方面,RDMA在服务器端CPU不参与的情况下直接读写服务器端内存,因此服务器端CPU无法主动感知数据写入事件以执行数据刷写操作,一旦系统崩溃会造成数据不一致的问题.针对以上2个问题,提出一种分布式持久性内存文件系统的一致性机制(crash consistency mechanism,CCM):首先设计实现了基于操作日志的一致性保障策略,通过将每次操作的元信息记录至日志,并持久化,以保障系统的一致性状态;其次,设计了一种客户端对服务器端的远程写一致性策略,在完成数据传输的同时使服务器端CPU主动执行数据刷写;最后实现了一种服务器端的数据异步持久化,以提高系统的处理能力.测试结果表明,基于CCM的文件系统写吞吐可达到网络裸带宽的88%.相比于现有系统Octopus,CCM性能下降控制在1%以内.

关键词：持久性内存远程直接内存访问一致性操作日志分布式文件系统

Pilot study on efficacy of reduced cathartic bowel preparation with polyethylene glycol and bisacodyl

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World Journal of Gastroenterology 2013年第4期19卷 561-568页

作者： Zhi-Yuan Chen He-Song Shen Ming-Yue Luo Chai-Jie Duan Wen-Li cai Hong-Bing Lu Guo-Peng Zhang Yang Liu Jerome Z Liang department of Radiology the Sixth Affiliated Hospital of Sun Yat-Sen University department of Radiology Guangdong Provincial Hospital of Traditional Chinese Medicine Research Center of Biomedical Engineering Graduate School at ShenzhenTsinghua University department of Radiology Massachusetts General Hospital and Harvard Medical SchoolBostonMA 02114United States department of Biomedical Engineering The Fourth Military Medical University departments of Radiology and computer science State University of New York at Stony BrookNew YorkNY 11794United States

AIM:To evaluate the efficacy of reduced cathartic bowel preparation with 2 L polyethylene glycol(PEG)-4000 electrolyte solution and 10 mg bisacodyl enteric-coated tablets for computed tomographic colonography(CTC).METHODS:Sixty subjects who gave informed consent were randomly assigned to study group A,study group B or the control *** the day prior to CTC,subjects in study group A were given 20 mL 40% wt/vol barium sulfate suspension before 3 mealtimes,60 mL 60% diatrizoate meglumine diluted in 250 mL water after supper,and 10 mg bisacodyl enteric-coated tablets 1 h before oral administration of 2 L PEG-4000 electrolyte *** in study group B were treated identically to those in study group A,with the exception of bisacodyl which was given 1 h after oral *** in the control group were managed using the same strategy as the subjects in study group A,but without administration of *** stool and fluid scores,the attenuation value of residual fluid,and discomfort during bowel preparation in the three groups were analyzed ***:The mean scores for residual stool and fluid in study group A were lower than those in study group B,but the differences were not statistically *** in study group A showed greater stool and fluid cleansing ability than the subjects in study group *** mean scores for residual stool and fluid in study groups A and B were lower than those in the control group,and were significantly *** was no significant difference in the mean attenuation value of residual fluid between study group A,study group B and the control *** total discomfort index during bowel preparation was 46,45 and 45 in the three groups,respectively,with no significant ***:Administration of 10 mg bisacodyl enteric-coated tablets prior to or after oral administration of 2 L PEG-4000 electrolyte solution enhances stool and fluid cleansing ability,and has no impact on the atten

关键词： Colorectal cancer Screening Computed tomographic colonography Polyethylene glycol Bisacodyl

Recent progress of integrated circuits and optoelectronic chips

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science China(Information sciences) 2021年第10期64卷 103-135页

作者： Yue HAO Shuiying XIANG Genquan HAN Jincheng ZHANG Xiaohua MA Zhangming ZHU Xingxing GUO Yahui ZHANG Yanan HAN Ziwei SONG Yan LIU Ling YANG Hong ZHOU Jiangyi SHI Wei ZHANG Min XU Weisheng ZHAO Biao PAN Yangqi HUANG Qi LIU Yimao cai Jian ZHU Xin OU Tiangui YOU Huaqiang WU Bin GAO Zhiyong ZHANG Guoping GUO Yonghua CHEN Yong LIU Xiangfei CHEN Chunlai XUE Xingjun WANG Lixia ZHAO Xihua ZOU Lianshan YAN Ming LI School of Microelectronics Xidian University State Key Laboratory of Integrated Service Networks Xidian University National Integrated Circuit Innovation Center School of Microelectronics Fudan University School of Integrated Circuit science and Engineering Beihang University China Center for Information Industry Development Frontier Institute of Chip and System Fudan University Institute of Microelectronics Peking University Nanjing Electronic Devices Institute State Key Laboratory of Functional Material for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Institute of Microelectronics Tsinghua University Center for Carbon-based Electronics Department of Electronics Peking University CAS Key Laboratory of Quantum Information University of Science and Technology of China CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Origin Quantum Computing Company Limited Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China National Laboratory of Solid State Microstructures & College of Engineering and Applied sciences Nanjing University State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Center of Materials science and Optoelectronics Engineering University of Chinese Academy of Sciences State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University School of Electrical and Electronic Engineering Tiangong University Center for Information Photonics and Communications School of Information Science and TechnologySouthwest Jiaotong University School of Electronic Electrical and Communication Engineering

Integrated circuits(ICs) and optoelectronic chips are the foundation stones of the modern information society. The IC industry has been driven by the so-called "Moore’s law" in the past 60 years, and now has entered the post Moore’s law era. In this paper, we review the recent progress of ICs and optoelectronic chips. The research status, technical challenges and development trend of devices, chips and integrated technologies of typical IC and optoelectronic chips are focused on. The main contents include the development law of IC and optoelectronic chip technology, the IC design and processing technology, emerging memory and chip architecture, brain-like chip structure and its mechanism, heterogeneous integration, quantum chip technology, silicon photonics chip technology, integrated microwave photonic chip, and optoelectronic hybrid integrated chip.

关键词： integrated circuit photonic neural computing semiconductor science and technology optoelectronic device and chip photonic integrated circuit wide bandgap semiconductors silicon photonics hybrid integration quantum chip integrated microwave photonic

基于稀疏表示和特征加权的大数据挖掘方法的研究

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计算机科学 2018年第11期45卷 256-260页

作者：蔡柳萍解辉张福泉张龙飞广东技术师范学院天河学院计算机科学与工程学院广州510540 清华大学计算机科学与技术系北京100084 北京理工大学软件学院北京100081

为了提高大数据挖掘的效率及准确度,文中将稀疏表示和特征加权运用于大数据处理过程中。首先,采用求解线性方程稀疏解的方式对大数据进行特征分类,在稀疏解的求解过程中利用向量的范数将此过程转化为最优化目标函数的求解。在完成特征... 详细信息

为了提高大数据挖掘的效率及准确度,文中将稀疏表示和特征加权运用于大数据处理过程中。首先,采用求解线性方程稀疏解的方式对大数据进行特征分类,在稀疏解的求解过程中利用向量的范数将此过程转化为最优化目标函数的求解。在完成特征分类后进行特征提取以降低数据维度,最后充分结合数据在类中的分布情况进行有效加权来实现大数据挖掘。实验结果表明,相比于常见的特征提取和特征加权算法,提出的算法在查全率和查准率方面均呈现出明显优势。

关键词：大数据数据挖掘特征加权特征提取稀疏表示

面向真彩色三维显示的分层角谱算法和Gerchberg-Saxton算法研究

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物理学报 2018年第9期67卷 116-125页

作者：范爽张亚萍王帆高云龙钱晓凡张永安许蔚曹良才昆明理工大学理学院昆明650500 昆明理工大学建筑工程学院昆明650500 清华大学精密仪器系精密测试技术及仪器国家重点实验室北京100084

分层角谱算法可用于三维物体全息图的生成计算,在计算时间、占用内存和算法复杂度方面占有优势.本文基于强度图和深度图的分层角谱算法,对多波长采样进行分析,有效抑制混频现象,实现了真彩色物体的计算全息图生成.针对分层角谱算法重建... 详细信息

分层角谱算法可用于三维物体全息图的生成计算,在计算时间、占用内存和算法复杂度方面占有优势.本文基于强度图和深度图的分层角谱算法,对多波长采样进行分析,有效抑制混频现象,实现了真彩色物体的计算全息图生成.针对分层角谱算法重建时产生的散斑噪声问题,引入Gerchberg-Saxton(GS)算法,提出基于分层角谱算法的GS算法.通过计算比较引入GS算法前后再现像的均方根误差和峰值信噪比,证明该算法可有效地抑制散斑噪声,提高全息图的再现像质量,更适用于复杂形貌三维物体的计算.

关键词：真彩色三维物体分层角谱法 Gerchberg-Saxton算法均方根误差

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开源软件中社区文档应用与维护的实证研究

计算机科学 2023年第S1期50卷 816-823页

作者：张禹王哲李志星余跃王涛蔡孟栾国防科技大学计算机学院长沙410000 清华大学公共管理学院北京100084

社区文档对开源软件的开发和和管理具有重要意义,虽然已有部分研究对社区文档的内容进行了初步分析,但是社区文档在开源软件中的实际应用情况以及开发者对社区文档的维护实践尚未得到充分研究。为填补这一空白,通过量化分析手段探索了... 详细信息

社区文档对开源软件的开发和和管理具有重要意义,虽然已有部分研究对社区文档的内容进行了初步分析,但是社区文档在开源软件中的实际应用情况以及开发者对社区文档的维护实践尚未得到充分研究。为填补这一空白,通过量化分析手段探索了社区文档的应用和维护现状。首先随机收集了托管于GitHub平台上近2000个开源项目的社区文档数据,分析了编程语言、项目所有者类型、项目成长期和项目社区规模等多个因素对社区文档应用的影响。与此同时,从文档位置、创建延迟、维护者、更新频率和更新原因多个方面分析了社区文档的维护实践。研究结果表明,README文档和LICENSE文档比CONTRIBUTING,CONDUCT和TEMPLATE文档具有更高的应用普及率和更早的应用时间。此外,社区文档在TypeScript语言的项目、大规模社区的项目以及组织所拥有的项目中的应用更为普遍。就文档位置而言,社区文档常被放置于项目的根目录中,由开发者中的小部分成员出于完善性和适应性需求,对文档进行低频率的更新和维护。本研究有助于增强开源软件开发者和使用者对社区文档应用和维护实践的了解,引导开源软件社区的健康发展。

关键词：开源软件社区文档文档普及文档维护 GitHub

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可视化计算与仿真支撑系统——VCS3

清华大学学报（自然科学版） 2000年第2期40卷 102-105页

作者：程芳真谢茂清蔡瑞忠蒋滋康清华大学热能工程系北京100084

为在微机系统上开发大型科学计算和仿真软件系统 ,建成可运行于 Windows NT/9x平台的可视化计算和仿真支撑系统。系统具有多种可视化的动态数据显示和在线修改方法 ;采用了先进的网络实时数据库技术和客户 /服务器运行机制 ,可支持网络... 详细信息

为在微机系统上开发大型科学计算和仿真软件系统 ,建成可运行于 Windows NT/9x平台的可视化计算和仿真支撑系统。系统具有多种可视化的动态数据显示和在线修改方法 ;采用了先进的网络实时数据库技术和客户 /服务器运行机制 ,可支持网络环境下多个用户的协同开发 ;实现了灵活的多流程仿真功能 ,使得一机多模的实现成为系统自然的扩展 ;提供了应用程序编程接口 ,为用户基于该平台的进一步开发提供了方便。运行证明该系统可以用作大型仿真系统的软件支撑平台。

关键词：计算机仿真可视化计算支撑系统 CCS3 Windows