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Improvement in the intense pulsed emission stability of grown CNT films via an electroless plated Ni layer

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Chinese Science Bulletin 2011年第22期56卷 2379-2382页

作者： ZENG fanGuang LI Xin LIU WeiHua QIAO ShuZhen MA HuaLi zhang Rui XIA LianSheng CHEN yi LIU XingGuang zhang huang Department of Mathematics and Physics Zhengzhou Institute of Aeronautical Industry Management Zhengzhou 450015 China school of electronic and {2. Engineering Xi'an Jiaotong University Xi'an 710049 China Institute of Fluid Physics Chinese Academy of Engineering Physics Mianyang 621900 China

Carbon nanotube(CNT)films were grown on silicon wafers with and without a nickel layer(Si-CNT and Ni-CNT)via the pyrolysis of iron *** nickel layer was prepared using the electroless plating *** study the emission stability of Si-CNT and Ni-CNT cathodes during intense pulsed emission,emission characteristics were measured repeatedly with a diode structure using a Marx generator as a voltage *** the peak values of the pulsed voltage,which were in the range between 1.62.1.66 MV(corresponding to electric field intensities between 11.57-11.85 V/μm),the first cycle emission current was 109.4 A for Si-CNT and 180.5 A for *** comparing the normalized emission currents of the Si-CNT and Ni-CNT cathodes,the improvement in the emission stability can be easily *** number of emission cycles necessary for the peak current to decay from 100%to 50%increased from^3 for Si-CNT to^11 for a Ni-CNT film.

关键词：碳纳米管薄膜化学镀镍层发射电流稳定性强脉冲生长碳纳米管阴极 Marx发生器

磁控管自由振荡带宽对其注入锁定带宽的影响研究

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真空电子技术 2024年第2期 1-6页

作者：咪姹果罗廷芳黄超苟大民赵朝霞张益黄卡玛四川大学电子信息学院四川成都610065 西华大学电气与电子信息学院四川成都610039

自由振荡磁控管的输出信号通常具有一定的带宽,而非理想的单频信号;文章研究了磁控管自由振荡输出带宽对其注入锁定的影响。从统计上认为自由振荡磁控管的输出频率服从正态分布,结合注入锁定理论,计算了磁控管在不同注入频率下的输出频... 详细信息

自由振荡磁控管的输出信号通常具有一定的带宽,而非理想的单频信号;文章研究了磁控管自由振荡输出带宽对其注入锁定的影响。从统计上认为自由振荡磁控管的输出频率服从正态分布,结合注入锁定理论,计算了磁控管在不同注入频率下的输出频谱。理论分析表明:当考虑自由振荡磁控管输出频谱具有一定带宽时,峰值频率牵引带宽将大于理想单频假设下的锁定带宽;随着自由振荡带宽的增加,峰值频率牵引带宽增加,锁定带宽减小。磁控管注入锁定实验结果表明:自由振荡带宽(3 dB)分别为0.375、1.049 MHz时,其锁定带宽分别为8.4、7.9 MHz,峰值频率牵引带宽分别为10.2.1..9 MHz,验证了理论的正确性。本研究发展了磁控管注入锁定理论。

关键词：磁控管注入锁定正态分布自由振荡带宽频率牵引

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 S{2.xue 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,2.1.)and the Conceptual Design Report(CDR,2.1.),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 2.2.-2.2.,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2.30s.

关键词： initiated exceeding precise

Modeling of a dynamic dual-input dual-output fast steering mirror system

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Frontiers of information Technology & electronic Engineering 2017年第10期18卷 1488-1498页

作者： Hong SONG Jia-heng zhang Ping YANG Hao-cai huang Shu-yue ZHAN Teng-jun LIU yi-lu GUO Hang-zhou WANG Hui huang Quan-quan MU Mei-fen fanG Ming-yuan YANG Ocean College Zhejiang UniversityZhoushan 316021China school of Digital Media&Design Hangzhou Dianzi UniversityHangzhou 310018China State Key Laboratory of Applied Optics Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesJilin 130033China Blue-Science Opto-electronics Co.Ltd. Hangzhou 310018China Core Tomorrow Science&Technology Co.Ltd. Harbin 150080China

A modeling method is proposed for a dynamic fast steering mirror(FSM) system with dual inputs and dual outputs. A physical model of the FSM system is derived based on first principles, describing the dynamics and coupling between the inputs and outputs of the FSM system. The physical model is then represented in a state-space form. Unknown parameters in the state-space model are identified by the subspace identification algorithm, based on the measured input-output data of the FSM system. The accuracy of the state-space model is evaluated by comparing the model estimates with measurements. The variance-accounted-for value of the state-space model is better than 97%, not only for the modeling data but also for the validation data set, indicating high accuracy of the model. Comparison is also made between the proposed dynamic model and the conventional static model, where improvement in model accuracy is clearly observed. The model identified by the proposed method can be used for optimal controller design for closed-loop FSM systems. The modeling method is also applicable to FSM systems with similar structures.

关键词： Fast steering mirror Dynamic system Input-output coupling,Physical modeling Subspace identification

Quafu-RL:The cloud quantum computers based quantum reinforcement learning

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Chinese Physics B 2024年第5期33卷 29-34页

作者：靳羽欣许宏泽王正安庄伟峰黄凯旋时运豪马卫国李天铭陈驰通许凯冯玉龙刘培陈墨李尚书杨智鹏钱辰马运恒肖骁钱鹏顾炎武柴绪丹普亚南张翼鹏魏世杰曾进峰李行龙桂鲁金贻荣于海峰范桁刘东胡孟军 Beijing Academy of Quantum information Sciences Beijing 100193China State Key Laboratory of Low Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China Institute of Physics Chinese Academy of SciencesBeijing 100190China Frontier Science Center for Quantum information Beijing 100184China school of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China school of Mathematical Sciences Nankai UniversityTianjin 300071China

With the rapid advancement of quantum computing,hybrid quantum–classical machine learning has shown numerous potential applications at the current stage,with expectations of being achievable in the noisy intermediate-scale quantum(NISQ)*** reinforcement learning,as an indispensable study,has recently demonstrated its ability to solve standard benchmark environments with formally provable theoretical advantages over classical ***,despite the progress of quantum processors and the emergence of quantum computing clouds,implementing quantum reinforcement learning algorithms utilizing parameterized quantum circuits(PQCs)on NISQ devices remains *** this work,we take the first step towards executing benchmark quantum reinforcement problems on real devices equipped with at most 136 qubits on the BAQIS Quafu quantum computing *** experimental results demonstrate that the policy agents can successfully accomplish objectives under modified conditions in both the training and inference ***,we design hardware-efficient PQC architectures in the quantum model using a multi-objective evolutionary algorithm and develop a learning algorithm that is adaptable to quantum *** hope that the Quafu-RL can be a guiding example to show how to realize machine learning tasks by taking advantage of quantum computers on the quantum cloud platform.

关键词： quantum cloud platform quantum reinforcement learning evolutionary quantum architecture search

Clinical evidence of three traditional Chinese medicine drugs and three herbal formulas for COVID-19:A systematic review and meta-analysis of the Chinese population

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结合医学学报:英文版 2023年第5期21卷 441-454页

作者： Liang-zhen You Qian-qian Dai Xiao-ying Zhong Dong-dong Yu He-rong Cui yi-fan Kong Meng-zhu Zhao Xin-yi zhang Qian-qian Xu Zhi-yue Guan Xu-xu Wei Xue-cheng zhang Song-jie Han Wen-jing Liu Zhao Chen Xiao-yu zhang Chen Zhao ying-hui Jin Hong-cai Shang Dongzhimen Hospital Key Laboratory Beijing University of Chinese MedicineBeijing 100700China Key Laboratory of Internal Medicine of Chinese Medicine Ministry of EducationBeijing University of Chinese MedicineBeijing 100700China school of Medical information Engineering Guangzhou University of Chinese MedicineGuangzhou 510006Guangdong ProvinceChina The First Affiliated Hospital Anhui University of Chinese MedicineHefei 230031Anhui ProvinceChina Institute of Clinical Basic Medicine of Chinese Medicine China Academy of Chinese Medical SciencesBeijing 100700China Center for Evidence-Based and Translational Medicine Zhongnan Hospital of Wuhan UniversityWuhan 430071Hubei ProvinceChina

Background The coronavirus disease 2.1.(COVID-19)continues to spread *** Chinese and Western medicine have had some successes in treating *** This study aims to evaluate the efficacy and safety of three traditional Chinese medicine drugs and three herbal formulas(3-drugs-3-formulas)in patients with *** strategy Relevant studies were identified from 12.electronic databases searched from their establishment to April 7,*** criteria Randomized controlled trials(RCTs),non-RCTs and cohort studies that evaluated the effects of 3-drugs-3-formulas for *** treatment group was treated with one of the 3-drugs-3-formulas plus conventional *** control group was treated with conventional *** extraction and analysis Two evaluators screened and selected literature independently,then extracted basic {2. and assessed risk of *** treatment outcome measures were duration of main symptoms,hospitalization time,aggravation rate and *** 5.4 was used to analyze the pooled results reported as mean difference(MD)with 95%confidence interval(CI)for continuous data and risk ratio(RR)with 95%CI for dichotomous *** Forty-one studies with a total of 13,2.0 participants were *** analysis suggests that compared with conventional treatment,the combination of 3-drugs-3-formulas might shorten duration of fever(MD=–1.39;95%CI:–2.1. to–0.59;P2.1. to–0.98;P2.2. to–0.51;P2.62.95%CI–3.52.to–1.72.P2.92.95%CI:–4.2. to–1.59;P2.P2.;95%CI:1.14 to 1.3;P2.;95%CI:1.09 to 1.42.P<0.05).Conclusion The 3-drugs-3-formulas

关键词： Traditional Chinese medicine Coronavirus disease 2.1. Herbal formulas Systematic review Meta-analysis

Generating superposed terahertz perfect vortices via a spin-multiplexed all-dielectric metasurface

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Photonics Research 2023年第3期11卷 431-441页

作者： fan huang QUAN XU WANyiNG LIU TONG WU JIANQIANG GU JIAGUANG HAN WEILI {2. Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering Tianjin University and Key Laboratory of Optoelectronics Information and Technology(Ministry of Education)Tianjin 300072China Guangxi Key Laboratory of Optoelectronic information Processing School of Optoelectronic EngineeringGuilin University of Electronic TechnologyGuilin 541004China school of Electrical and Computer Engineering Oklahoma State UniversityStllwaterOklahoma 74078USA

Perfect optical vortices(POVs),characterized as a ring radius independent of topological charge(TC),possess extensive application in particle manipulation and optical *** present,the complex and bulky optical device for generating POVs has been miniaturized by leveraging the metasurface,and either spindependent or spin-independent POV conversions have been further ***,it is still challenging to generate superposed POVs for incidences with orthogonal circular ***,a spinmultiplexed all-dielectric metasurface method for generating superposed POVs in the terahertz frequency range is proposed and *** using the multiple meta-atom comprised structure as the basic unit,the complex amplitude of two superposed POVs is modulated,decoupled,and subsequently encoded to left-and righthanded circular polarization ***,two kinds of metasurfaces are fabricated and characterized to validate this controlling *** is demonstrated that the measured intensity and phase distributions match well with the calculation of the Rayleigh–Sommerfeld diffraction integral,and the radius of superposed POVs is independent of *** work provides promising opportunities for developing ultracompact terahertz functional devices applied to complex structured light generation and terahertz communication,and exploring sophisticated spin angular momentum and orbital angular momentum interactions like the photonic spin-Hall effect.

关键词： dielectric radius generating

Ultrafast optical spectroscopy evidence of pseudogap and electronphonon coupling in an iron-based superconductor KCa_(2.Fe_(4)As_(4)F_(2.

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Science china(Physics,Mechanics & Astronomy) 2022年第3期65卷 92-98页

作者： Chen zhang Qi-yi Wu Wen-Shan Hong Hao Liu Shuang-Xing Zhu Jiao-Jiao Song yin-Zou Zhao {2.-ying Wu Zi-Teng Liu Shu-Yu Liu Ya-Hua Yuan Han huang Jun He Shiliang Li Hai-Yun Liu Yu-Xia Duan Hui-Qian Luo Jian-Qiao Meng school of Physics and electronics Central South UniversityChangsha 410083China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China school of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China Beijing Academy of Quantum information Sciences Beijing 100193China

We use ultrafast optical spectroscopy to study the nonequilibrium quasiparticle relaxation dynamics of the iron-based superconductor KCa_(2.Fe_(4)A_(s4)F_(2.with T_(c)= 33.5 K. Our results reveal a possible pseudogap(△_(PG)=(2.4 ± 0.1) me V) below T*≈ 50 K but prior to the opening of a superconducting gap(△SC(0) ≈(4.3 ± 0.1) me V). Measurements under high pump fluence reveal two distinct, coherent phonon oscillations with 1.95 and 5.51 THz frequencies, respectively. The high-frequency A1 g(2. mode corresponds to the c-axis polarized vibrations of Fe As planes with a nominal electron-phonon coupling constant λA1 g(2.= 0.194 ± *** findings suggest that the pseudogap is likely a precursor of superconductivity, and the electron-phonon coupling may play an essential role in the superconducting pairing in KCa_(2.Fe_(4)A_(s4)F_(2..

关键词： KCa_(2.Fe_(4)A_(s4)F_(2. ultrafast spectroscopy electron-phonon coupling superconductivity

《2.2.技术聚焦》折射新一轮科技革命与产业变革的形势及制高点

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中国科学院院刊 2024年第8期39卷 1447-1457页

作者：李国鹏韩淋潘教峰冷伏海张凤杨帆邢颖王海名范唯唯王海霞边文越陈挺袁建霞张超星黄龙光王小梅杨松王荣刚李赞梅陈杰周波孙震白如江周丽英彭鲲鹏高杨吴广枫中国科学院科技战略咨询研究院北京100190 中国科学院大学公共政策与管理学院北京100049 北京理工大学计算机学院北京100081 北京大学深圳研究生院信息工程学院深圳518055 中国医学科学院医学信息研究所北京100020 东北大学机械工程与自动化学院沈阳110819 工业和信息化部装备工业发展中心北京100846 山东理工大学信息管理学院淄博255000 中国农业大学图书馆北京100193 北京集佳知识产权代理有限公司北京100004 北京中泰晨创环保科技有限公司北京100023 中国农业大学食品科学与营养工程学院北京100193

2.2.年4月,中国科学院科技战略咨询研究院发布《2.2.技术聚焦》报告。报告运用大数据和深度学习技术挖掘专利技术间隐藏的深层关系,基于对68万件两方专利聚类形成的2.812.技术焦点,遴选、命名和概述了分布于世界知识产权组织(WIPO)专... 详细信息

2.2.年4月,中国科学院科技战略咨询研究院发布《2.2.技术聚焦》报告。报告运用大数据和深度学习技术挖掘专利技术间隐藏的深层关系,基于对68万件两方专利聚类形成的2.812.技术焦点,遴选、命名和概述了分布于世界知识产权组织(WIPO)专利分类体系的四大部类下32.技术领域排名最前的100个(Top 100)技术焦点,并对其中的32.进行了重点分析解读。文章以Top 100技术焦点为基础,凝练基于高影响力专利大数据分析所反映的技术和产业发展趋势与热点,以此折射新一轮科技革命和产业变革的形势及制高点。

关键词：技术焦点高影响力专利科技革命产业变革技术制高点

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