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Science china(Information Sciences) 2012年第1期55卷 200-213页

作者： chen pengnian1,qin huashu2,wang yong3.hong yiguang2 1department of mathematics,china jiliang university,hangzhou 3.0018,china 2Institute of Systems Science,The Chinese Academy of Sciences,Beijing 100080,china 3department of Mechanics,Peking university,Beijing 100871,china 1. department of mathematics China Jiliang University Hangzhou 310018 China2. Institute of Systems Science The Chinese Academy of Sciences Beijing 100080 China3. Department of Mechanics Peking University Beijing 100871 China

The paper deals with the problem of stabilization of stationary bifurcation solutions of nonlinear systems via dynamic output *** is emphasized that the parameter of the system is not directly *** introduce the concepts of uniform observability of the inverse of a function of state and input and N-order-input-to-state bifurcation *** on the concepts,we propose a new method for designing dynamic compensators that guarantee bifurcation stability for the closed-loop *** an example,we apply the general theory to active control of rotating stall in axial flow compressors by designing a stabilizing dynamic compensator for the three-state Moore-Greitzer model with a class of cubic compressor characteristics.

关键词： bifurcation control uniform observability dynamic output feedback rotating stall

Estimation of States and Periodic Disturbance Inputs

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Estimation of States and Periodic Disturbance Inputs

吩嗪类衍生物用于快速充放电和长寿命的水系钾离子全电池负极

2010 Chinese Control and Decision Conference

作者： pengnian chen~1,huashu qin~2 1.department of mathematics,china jiliang university,hangzhou 3.0018,china 2.Institute of Systems Science,The Chinese Academy of Sciences,Beijing 100080,china

＜正＞The paper considers the problem of estimation of states and unknown periodic disturbance *** is only assumed that the periods of the periodic disturbance inputs are known.A method of designing observers for the estimation is presented,which ensures that the errors of both state estimation and disturbance estimation converge to zero.

关键词： State Estimation Periodic Disturbance Adaptive Observer

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Science china Materials 2024年第5期67卷 1464-1470页

作者：郑易帆于丹丹王健晨杨杰罗稳戈天奇秦来顺黄岳翔陈达 College of Materials and Chemistry China Jiliang UniversityHangzhou310018China Hydrogen Energy Research Center Petrochina Petrochemical Research Institute Beijing102200China

有机电极材料因具有结构多样性和可持续性,在水系钾离子电池研究领域展示出广阔的前景,但它们大多数存在导电性差、易溶于电解液的问题,导致电极活性物质利用率低、循环稳定性差.本文通过含氮苯环的共轭延申、引入氰基活性中心,获得了3C... 详细信息

有机电极材料因具有结构多样性和可持续性,在水系钾离子电池研究领域展示出广阔的前景,但它们大多数存在导电性差、易溶于电解液的问题,导致电极活性物质利用率低、循环稳定性差.本文通过含氮苯环的共轭延申、引入氰基活性中心,获得了3CN-HATN.与经#吩嗪负极相比,3CN-HATN的最低未占据分子轨道能级更低,更容易被还原,且其能带隙较窄,改善了导电性,其共轭结构可有效抑制循环过程中3CN-HATN的溶解.3CN-HATN负极在80 C(1 C=350 mA g^(-1))下比容量高达233.8 mA h g^(-1),将其与Ni(OH)_(2)正极匹配,构建的水系钾离子全电池具备优异的循环稳定性和快充性能,30 C下循环10,000圈后容量保持率达81.5%.

关键词： aqueous rechargeable batteries π-conjugated structure organic electrodes K+storage phenazine derivatives

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花图的意大利控制数

中国计量大学学报 2024年第3期35卷 528-532,540页

作者：张宇萱陈琴中国计量大学理学院浙江杭州310018

目的:确定了花图J_(n)的意大利控制数γ_(w2)(J_(n))的准确值。方法:制定权转移规则,将初始权值至少为2的列转移权值给相邻的两列。分析拥有不同权值相邻的列和经权转移得到的新权值平均值,确定花图J_(n)的意大利控制数的下界;通过给出... 详细信息

目的:确定了花图J_(n)的意大利控制数γ_(w2)(J_(n))的准确值。方法:制定权转移规则,将初始权值至少为2的列转移权值给相邻的两列。分析拥有不同权值相邻的列和经权转移得到的新权值平均值,确定花图J_(n)的意大利控制数的下界;通过给出具体的标号方案,确定花图J_(n)意大利控制数的上界。结果:通过比较意大利控制数的上界和下界的值,确定了花图J_(n)的意大利控制数γ_(w2)(J_(n))的准确值,并得到最优的标号方案。结论:当n≥3时,花图的意大利控制数为γ_(w2)(J_(n))=[5n/3]。

关键词：控制数意大利控制数花图权转移

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

Large Magnetoresistance and Nontrivial Berry Phase in Nb_(3)Sb Crystals with A15 Structure

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Chinese Physics Letters 2021年第8期38卷 110-114页

作者： qin chen Yuxing Zhou Binjie Xu Zhefeng Lou Huancheng chen Shuijin chen Chunxiang Wu Jianhua Du Hangdong wang Jinhu Yang Minghu Fang department of Physics Zhejiang UniversityHangzhou 310027China department of Applied Physics China Jiliang UniversityHangzhou 310018China department of Physics Hangzhou Normal UniversityHangzhou 310036China Collaborative Innovation Center of Advanced Microstructure Nanjing UniversityNanjing 210093China

Compounds with the A15 structure have attracted extensive attention due to their superconductivity and nontrivial topological band *** have successfully grown Nb_(3)Sb single crystals with the A15 structure and systematically measured the longitudinal resistivity,Hall resistivity and quantum oscillations in *** to other topological trivial/nontrivial semimetals,Nb_(3)Sb exhibits large magnetoresistance(MR)at low temperatures(717%,2 K and 9 T),unsaturating quadratic field dependence of MR and up-turn behavior in ρ_(xx)(T)curves under magnetic field,which is considered to result from a perfect hole-electron compensation,as evidenced by the Hall resistivity *** nonzero Berry phase obtained from the de-Hass van Alphen(dHvA)oscillations demonstrates that Nb_(3)Sb is topologically *** results indicate that Nb_(3)Sb superconductor is also a semimetal with large MR and nontrivial Berry *** indicates that Nb_(3)Sb may be another platform to search for the Majorana zero-energy mode.

关键词： nontrivial Berry topological

Magnetoresistance and Kondo Effect in Nodal-Line Semimetal VAs_(2)

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Chinese Physics Letters 2021年第1期38卷 92-98页

作者： Shuijin chen Zhefeng Lou Yuxing Zhou qin chen Binjie Xu Chunxiang Wu Jianhua Du Jinhu Yang Hangdong wang Minghu Fang department of Physics Zhejiang UniversityHangzhou 310027China department of Applied Physics China Jiliang UniversityHangzhou 310018China department of Physics Hangzhou Normal UniversityHangzhou 310036China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

We performed calculations of the electronic band structure and the Fermi surface,measured the longitudinal resistivity ρxx(T,H),Hall resistivity ρxy(T,H),and magnetic susceptibility as a function of temperature at various magnetic fields for VAs_(2) with a monoclinic crystal *** band structure calculations show that VAs_(2) is a nodal-line semimetal when spin-orbit coupling is *** emergence of a minimum at around11 K in ρxx(T) measured at H=0 demonstrates that some additional magnetic impurities(V^(4+),S=1/2)exist in VAs_(2) single crystals,inducing Kondo scattering,evidenced by both the fitting of ρxx(T) data and the susceptibility *** is found that a large positive magnetoresistance(MR) reaching 649% at 10 K and 9 T,its nearly quadratic field dependence,and a field-induced up-turn behavior of ρxx(T) also emerge in VAs_(2),although MR is not so large due to the existence of additional scattering compared with other topological nontrivial/trivial *** observed properties are attributed to a perfect charge-carrier compensation,which is evidenced by both the calculations relying on the Fermi surface and the Hall resistivity *** results indicate that the compounds containing V(3d^(3)4s^(2)) element can be as a platform for studying the influence of magnetic impurities to the topological properties.

关键词： resistance Kondo resistivity

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线性六边形链图的半全控制数

中国计量大学学报 2020年第4期31卷 514-518页

作者：宋曦陈琴中国计量大学理学院浙江杭州310018

目的:研究线性六边形链图H m的半全控制数γt2(H m),其中H m表示由m个六边形组成的线性链图。方法:首先给出γt2(H m)和γt2(H m+3)的一个关系式,通过归纳法得到γt2(H m)的一个下界;再通过构造法给出线性六边形链图H m的一个半全控制集... 详细信息

目的:研究线性六边形链图H m的半全控制数γt2(H m),其中H m表示由m个六边形组成的线性链图。方法:首先给出γt2(H m)和γt2(H m+3)的一个关系式,通过归纳法得到γt2(H m)的一个下界;再通过构造法给出线性六边形链图H m的一个半全控制集,得到γt2(H m)的一个上界;最后比较所得的上界和下界值,得到线性六边形链图的半全控制数。结果:确定了线性六边形链图H m的半全控制数并且给出一个基数最小的半全控制集。结论:对于由m个六边形组成的线性六边形链图H m,其半全控制数为γt2(H m)=(4m+1)/3+1。

关键词：控制集控制数半全控制集半全控制数线性六边形链图

超超临界机组锅炉贴壁风系统的数值模拟及工程验证

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热能动力工程 2022年第10期37卷 112-121页

作者：陈勤根林闽城项群扬张光学浙江浙能技术研究院有限公司浙江杭州311121 宁夏枣泉发电有限责任公司宁夏银川750000 中国计量大学能源工程研究所浙江杭州310018

为了解决某660 MW超超临界对冲燃烧锅炉的高温腐蚀问题,提出了前后墙布置高速直流贴壁风改造方案,并采用计算流体力学理论对该方案进行数值模拟。改造前的锅炉温度沿高度分布、主燃区水冷壁贴壁气氛等模拟数据与实测结果基本符合,验证... 详细信息

为了解决某660 MW超超临界对冲燃烧锅炉的高温腐蚀问题,提出了前后墙布置高速直流贴壁风改造方案,并采用计算流体力学理论对该方案进行数值模拟。改造前的锅炉温度沿高度分布、主燃区水冷壁贴壁气氛等模拟数据与实测结果基本符合,验证了模拟的准确性。结果表明:当贴壁风率较低时,由于炉膛内温度高、烟气粘度大,射流穿透力不足,效果较差;当贴壁风率达到3%以上时,射流动量和初始速度增大,射流刚性增强,能够抵达高温腐蚀区域;贴壁风对炉膛中间主体区域的气体组分影响不大,仅提高了侧墙贴壁区域的氧化性气氛,使具有高温腐蚀倾向的水冷壁面积大幅减少。实际改造结果表明,该方案对改善主燃区高温腐蚀区域的贴壁气氛效果显著,贴壁O_(2)体积分数由1.0%提高至2.7%左右,而还原性CO和H_(2)S的体积分数降幅分别达到70%和85%。

关键词：高温腐蚀贴壁风计算流体力学数值模拟工程验证

具有可见光响应的磷烯/g-C3N4异质结的构建及其在高效太阳能分解水制氢中的应用

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人工晶体学报 2020年第4期49卷 624-630页

作者：许振霞梁俊辉陈达胡亦谦秦来顺黄岳祥中国计量大学材料与化学学院杭州310018

近年来,二维(2D)g-C3N4基材料因其较短的电荷传输距离和充分暴露的表面活性位点,受到科研工作者的广泛关注。然而,g-C3N4较差的电荷分离和光吸收能力限制了进一步实际应用。通过引入具有高载流子迁移率和可见光响应的磷烯(FBP),构建FBP/... 详细信息

近年来,二维(2D)g-C3N4基材料因其较短的电荷传输距离和充分暴露的表面活性位点,受到科研工作者的广泛关注。然而,g-C3N4较差的电荷分离和光吸收能力限制了进一步实际应用。通过引入具有高载流子迁移率和可见光响应的磷烯(FBP),构建FBP/g-C3N4异质结同时增强光催化剂的光吸收和电荷分离能力;同时,具有良好催化活性的FBP也可以作为g-C3N4的助催化剂,进一步降低电荷在催化剂/电解液界面处的反应势垒,从而有效抑制电荷复合,并提高光催化制氢效率。研究结果表明:相较于纯g-C3N4,FBP/g-C3N4异质结不仅可以有效抑制电荷复合、促进光生电荷分离,而且可以极大地拓宽光谱响应范围。最终,构建的FBP/g-C3N4异质结光催化剂获得了1.08 mmol·g^-1·h^-1的光催化制氢速率,相较于纯g-C3N4提高了1.2倍。

关键词：光催化剂 g-C3N4 磷烯太阳能制氢性能