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STCF conceptual design report (Volume 1): Physics & detector

Frontiers of physics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.Z.Bai Y.Bai O.Bakina A.Barnyakov V.Blinov V.bobrovnikov D.bodrov A.bogomyagkov A.bondar I.boyko Z.H.Bu F.M.Cai H.Cai J.J.Cao Q.H.Cao X.Cao Z.Cao Q.Chang K.T.Chao D.Y.Chen H.Chen H.X.Chen J.F.Chen K.Chen L.L.Chen P.Chen S.L.Chen S.M.Chen S.Chen S.P.Chen W.Chen X.Chen X.F.Chen X.R.Chen Y.Chen Y.Q.Chen H.Y.Cheng J.Cheng S.Cheng T.G.Cheng J.P.Dai L.Y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko J.M.Dias D.Z.Ding L.Y.Dong W.H.Dong V.Druzhinin D.S.Du Y.J.Du Z.G.Du L.M.Duan D.Epifanov Y.L.Fan S.S.Fang Z.J.Fang G.Fedotovich C.Q.Feng X.Feng Y.T.Feng J.L.Fu J.Gao Y.N.Gao P.S.Ge C.Q.Geng L.S.Geng A.Gilman L.Gong T.Gong B.Gou W.Gradl J.L.Gu A.Guevara L.C.Gui A.Q.Guo F.K.Guo J.C.Guo J.Guo Y.P.Guo Z.H.Guo A.Guskov K.L.Han L.Han M.Han X.Q.Hao J.B.He S.Q.He X.G.He Y.L.He Z.B.He Z.X.Heng B.L.Hou T.J.Hou Y.R.Hou C.Y.Hu H.M.Hu K.Hu R.J.Hu W.H.Hu X.H.Hu Y.C.Hu J.Hua G.S.Huang J.S.Huang M.Huang Q.Y.Huang W.Q.Huang X.T.Huang X.J.Huang Y.B.Huang Y.S.Huang N.Hüsken V.Ivanov Q.P.Ji J.J.Jia S.Jia Z.K.Jia H.B.Jiang J.Jiang S.Z.Jiang J.B.Jiao Z.Jiao H.J.jing X.L.Kang X.S.Kang B.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin Y.Lei E.Levichev C.H.li C.li D.Y.li F.li G.li G.li H.B.li H.li H.N.li H.J.li H.L.li J.M.li J.li L.li L.li L.Y.li N.li P.R.li R.H.li S.li T.li W.J.li X.li X.H.li X.Q.li X.H.li Y.li Y.Y.li Z.J.li H.liang J.H.liang Y.T.liang G.R.liao L.Z.liao Y.liao C.X.lin D.X.lin X.S.lin B.J.liu C.W.liu D.liu F.liu G.M.liu H.B.liu J.liu J.J.liu J.B.liu K.liu K.Y.liu K.liu L.liu Q.liu S.B.liu T.liu X.liu Y.W.liu Y.liu Y.L.liu Z.Q.liu Z.Y.liu Z.W.liu I.Logashenko Y.Long C.G.Lu J.X.Lu N.Lu Q.F.Lü Y.Lu Y.Lu Z.Lu P.Lukin F.J.Luo T.Luo X.F.Luo Y.H.Luo H.J.Lyu X.R.Lyu J.P.Ma P.Ma Y.Ma Y.M.Ma F.Maas S.Malde D.Matvienko Z.X.Meng R.Mitchell A.Nefediev Y.Nefedov S.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan Y.Pan E.Passemar Y.P.Pei H.P.Peng L.Peng X.Y.Peng X.J.Peng K.Peters S.Pivovarov E.Pyata B.B.Qi Y.Q.Qi W.B.Qian Y.Qian C.F.Qiao J.J.Qin J.J.Qin L.Q.Qin X.S.Qin T.L.Qiu J.Rademacker C.F.Redmer H.Y.Sang Anhui university Hefei 230039China Beihang university Beijing 100191China Budker Institute of Nuclear Physics Novosibirsk 630090Russia CAS key laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central china Normal university Wuhan 430079China Central South university Changsha 410083China china university of Geosciences Wuhan 430074China china university of Mining and Technology Xuzhou 221116China École Polytechnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan university Shanghai 200433China Goethe university Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal university Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced Study UCASHangzhou 310024China Hebei Normal university Shijiazhuang 050024China Hebei university Baoding 071002China Hefei university of Technology Hefei 230601China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal university Xinxiang 453007China Henan university Kaifeng 475004China High Energy Physics Center Chung-Ang UniversitySeoul 06974Korea Higher School of Economy 11 Pokrovsky Bulvar Moscow 109028Russia Huangshan university Huangshan 245000China Hubei university of Automotive Technology Shiyan 442002China Hunan Normal university Changsha 410081China Hunan university of Science and Technology Xiangtan 411201China Hunan university Changsha 410082China Indiana university BloomingtonIndiana 47405USA Inner Mongolia university Hohhot 010021China Institute of Advanced Science Facilities Shenzhen 518107China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Jilin university Changch

The superτ-charm facility(STCF)is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** STCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the BEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the Standard *** STCF project in china is under development with an extensive R&D *** document presents the physics opportunities at the STCF,describes conceptual designs of the STCF detector system,and discusses future plans for detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity STCF detector conceptual design

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Realizing ultra-low thermal conductivity by strong synergy of asymmetric geometry and electronic structure in boron nitride and arsenide

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Rare Metals 2023年第1期42卷 210-221页

作者： lin-Feng Yu jin-yuan xu Chen Shen E.Zhou jing Wu Hong-Bin zhang Xiong Zheng Hui-Min Wang Guang-Zhao Qin state key laboratory of Advanced Design and Manufacturing for Vehicle body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha410082China Institute of Materials Science Technical University of DarmstadtDarmstadt64287Germany Hunan key laboratory for Micro-Nano Energy Materials&Device and School of Physics and Optoelectronics Xiangtan UniversityXiangtan411105China

The design of novel devices with specific technical interests through modulating structural properties and bonding characteristics promotes the vigorous development of materials *** arsenide and boron nitride,as remarkably high thermal conductivity(κ)materials,are unfavorable for thermal insulation applications as well as thermoelectric *** this study,based on first-principles calculations,we identify a group of novel borides with ultra-lowκ,i.e.,g-B_(3)X_(5)(X=N,P,and As).Theκof g-B_(3)N_(5),g-B_(3)P_(5),and g-B_(3)As_(5)are 21.08,2.50,and 1.85 W·m^(-1)·K^(-1),respectively,which are boron nitride and boron arsenide systems with the lowestκreported so *** ultra-lowκis attributed to the synergy effect of electronics(lone-pair electrons)and geometry(buckling structures)on thermal *** discovery of the ultralowκof boron nitride and boron arsenide systems can well fill the gaps in applications of thermal insulation and thermoelectric devices.

关键词： boron arsenide boron nitride Thermal conductivity Component reconstruction

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A Fuzzy Neural Network Based Dynamic Data Allocation Model on Heterogeneous Multi-GPUs for Large-scale Computations

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International Journal of Automation and computing 2018年第2期15卷 181-193页

作者： Chao-Long zhang yuan-Ping xu Zhi-Jie xu Jia He jing Wang Jian-Hua Adu School of software engineering Chengdu University of Information Technology School of Computing & engineering University of Huddersfield School of Computer Science Chengdu University of Information Technology Department of Computing Sheffield Hallam University

The parallel computation capabilities of modern graphics processing units （GPUs） have attracted increasing attention from researchers and engineers who have been conducting high computational throughput studies. However, current single GPU based engineering solutions are often struggling to fulfill their real-time requirements. Thus, the multi-GPU-based approach has become a popular and cost-effective choice for tackling the demands. In those cases, the computational load balancing over multiple GPU ＂nodes＂ is often the key and bottleneck that affect the quality and performance of the real=time system. The existing load balancing approaches are mainly based on the assumption that all GPU nodes in the same computer framework are of equal computational performance, which is often not the case due to cluster design and other legacy issues. This paper presents a novel dynamic load balancing （DLB） model for rapid data division and allocation on heterogeneous GPU nodes based on an innovative fuzzy neural network （FNN）. In this research, a 5-state parameter feedback mechanism defining the overall cluster and node performance is proposed. The corresponding FNN-based DLB model will be capable of monitoring and predicting individual node performance under different workload scenarios. A real=time adaptive scheduler has been devised to reorganize the data inputs to each node when necessary to maintain their runtime computational performance. The devised model has been implemented on two dimensional （2D） discrete wavelet transform （DWT） applications for evaluation. Experiment results show that this DLB model enables a high computational throughput while ensuring real=time and precision requirements from complex computational tasks.

关键词： Heterogeneous GPU cluster dynamic load balancing fuzzy neural network adaptive scheduler discrete wavelet trans-form.

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Tsaokols A and B,unusual flavanol-monoterpenoid hybrids asα-glucosidase inhibitors from Amomum tsao-ko

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Chinese Chemical Letters 2021年第3期32卷 1202-1205页

作者： Xiao-Feng He Ji-Jun Chen Tian-Ze li jing Hu xu-Ke zhang yuan-Qiang Guo xue-Mei zhang Chang-An Geng state key laboratory of Phytochemistry and Plant Resources in West china Kunming Institute of BotanyChinese Academy of SciencesYunnan Key Laboratory of Natural Medicinal ChemistryKunming 650201China College of Pharmacy and Tianjin key laboratory of Molecular Drug Research Nankai UniversityTianjin 300071China university of Chinese Academy of Sciences Beijing 100049China

Tsaokols A(1)and B(2),two complicated flavanol-monoterpenoid hybrids,were isolated from the dried fruits of Amomum tsao-ko under the guidance of LCMS and *** structures were determined by extensive spectroscopic analyses and electronic circular dichroism(ECD)*** 1 and2 shared a flavanol backbone fused with 5/7 and 5/6 bicyclic monoterpenoid scaffolds,which were biogenetically condensed by Michael addition and *** 1 and 2 exhibited significantα-glucosidase inhibitory activity with IC_(50)values of 18.8 and 38.6μmol/L(acarbose,IC_(50)=213μmol/L).Docking study supported the strong interactions of 1 and 2 bonding with enzyme by mainly hydrophobic and hydrogen-bond *** 1 and 2 could be fast distinguished by the diagnostic ions at m/z 289 and 313 in negative MS^(2)experiments.

关键词： Amomum tsao-ko Zingiberaceae Flavanol-monoterpenoid hybrids α-Glucosidase inhibitors

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Identification of twist-angle-dependent excitons in WS2/WSe2 heterobilayers

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National Science Review 2022年第6期9卷 56-63页

作者： Ke Wu Hongxia Zhong Quanbing Guo Jibo Tang jing zhang lihua Qian Zhifeng Shi Chendong zhang Shengjun yuan Shunping zhang Hongxing xu School of Physics and Technology and key laboratory of Artificial Micro-and Nano-Structures of Ministry of Education Wuhan University School of Physics Huazhong University of Science and Technology The Institute for Advanced Studies Wuhan University key laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou University

Stacking atomically thin films enables artificial construction of van der Waals heterostructures with exotic functionalities such as superconductivity, the quantum Hall effect, and engineered light-matter *** particular, heterobilayers composed of monolayer transition metal dichalcogenides have attracted significant interest due to their controllable interlayer coupling and trapped valley excitons in moiré superlattices. However, the identification of twist-angle-modulated optical transitions in heterobilayers is sometimes controversial since both momentum-direct(K–K) and-indirect excitons reside on the low energy side of the bright exciton in the monolayer constituents. Here, we attribute the optical transition at ～1.35 eV in the WS2/WSe2heterobilayer to an indirect Γ–K transition based on a systematic analysis and comparison of experimental photoluminescence spectra with theoretical calculations. The exciton wavefunction obtained by the state-of-the-art GW-Bethe-Salpeter equation approach indicates that both the electron and hole of the excitons are contributed by the WS2layer. Polarization-resolved k-space imaging further confirms that the transition dipole moment of this optical transition is dominantly in-plane and is independent of the twist angle. The calculated absorption spectrum predicts that the so-called interlayer exciton peak coming from the K–K transition is located at 1.06 eV, but with a much weaker amplitude. Our work provides new insight into the steady-state and dynamic properties of twist-angle-dependent excitons in van der Waals heterostructures.

关键词： heterobilayers twist angle exciton indirect transition transition dipole moment

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Satellite SAR observation of the sea surface wind field caused by rain cells

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Acta Oceanologica Sinica 2016年第9期35卷 80-85页

作者： YE Xiaomin liN Mingsen yuan Xinzhe DING jing XIE xuetong zhang Yi xu Ying College of Information Science and engineering Ocean University of China National Satellite Ocean Application Service State Oceanic Administration key laboratory of Space Ocean Remote Sensing and Application State Oceanic Administration School of Geographical Sciences Guangzhou University

Rain cells or convective rain,the dominant form of rain in the tropics and subtropics,can be easy detected by satellite Synthetic Aperture Radar（SAR） images with high horizontal *** footprints of rain cells on SAR images are caused by the scattering and attenuation of the rain drops,as well as the downward *** this study,we extract sea surface wind field and its structure caused by rain cells by using a RADARSAT-2 SAR image with a spatial resolution of 100 m for case *** extract the sea surface wind speeds from SAR image by using CMOD4 geophysical model function with outside wind directions of NCEP final operational global analysis data,Advance Scatterometer（ASCAT） onboard European Met Op-A satellite and microwave scatterometer onboard Chinese HY-2 satellite,*** root-mean-square errors（RMSE） of these SAR wind speeds,validated against NCEP,ASCAT and HY-2,are 1.48 m/s,1.64 m/s and 2.14 m/s,*** signature patterns with brighter on one side and darker on the opposite side on SAR image are interpreted as the sea surface wind speed（or sea surface roughness） variety caused by downdraft associated with rain *** wind speeds taken from the transect profile which superposes to the wind ambient vectors and goes through the center of the circular footprint of rain cell can be fitted as a cosine or sine curve in high linear correlation with the values of no less than *** background wind speed,the wind speed caused by rain cell and the diameter of footprint of the rain cell with kilometers or tens of kilometers can be acquired by fitting *** cases interpreted and analyzed in this study all show the same conclusion.

关键词： rain cells Synthetic Aperture Radar (SAR) sea surface wind field downdraft

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Haptic display for virtual reality: progress and challenges

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Virtual Reality & Intelligent Hardware 2019年第2期1卷 136-162页

作者： Dangxiao WANG yuan GUO Shiyi liU Yuru zhang Weiliang xu jing XIAO state key laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100083China Beijing Advanced Innovation Center for Biomedical engineering Beihang UniversityBeijing 100083China Peng Cheng laboratory Shenzhen 518055China Department of Mechanical engineering University of AucklandAuckland 1142New Zealand School of Computer Science and the Robotics engineering Program Worcester Polytechnic InstituteWorcesterMA 01609-2280USA

Immersion, interaction, and imagination are three features of virtual reality (VR). Existing VR systems possess fairly realistic visual and auditory feedbacks, and however, are poor with haptic feedback, by means of which human can perceive the physical world via abundant haptic properties. Haptic display is an interface aiming to enable bilateral signal communications between human and computer, and thus to greatly enhance the immersion and interaction of VR systems. This paper surveys the paradigm shift of haptic display occurred in the past 30 years, which is classified into three stages, including desktop haptics, surface haptics, and wearable haptics. The driving forces, key technologies and typical applications in each stage are critically reviewed. Toward the future high-fidelity VR interaction, research challenges are highlighted concerning handheld haptic device, multimodal haptic device, and high fidelity haptic rendering. In the end, the importance of understanding human haptic perception for designing effective haptic devices is addressed.

关键词： Haptic display Virtual reality Desktop haptics Surface haptics Wearable haptics Multimodal haptics

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Intraspecific diversity: adaptive differentiation of Picea mongolica W. D. xu ecotypes

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Forestry Studies in china 2011年第3期13卷 189-197页

作者： liU An-tian ZOU Chun-jing zhang Chao ZHENG yuan-run Hideyuki SHIMIZU xu wen-duo Shanghai key laboratory of Urbanization ＆ Ecological Restoration School of Life Science East China Normal University Shanghai 200062 P. R. China state key laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing 100093 P. R. China National Institute for Environmental Studies 16-2 Onogawa Tsukuba Ibaraki 3005-8056 Japan Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 P. R. China

Picea mongolica W. D. xu is an endemic and endangered species which is only found in semi-arid areas of northern china. It has been widely used as an afforestation tree in the establishment of the Three-North Shelterbelt System for its adaptation to arid soils and as a virescent tree in urban gardens and streets for its beautiful shape. Due to different microenvironments, P. mongolica populations may differentiate into many ecological groups with different adaptive abilities. Long-term adaptation to a dry environment makes P. mongolica differentiate into different ecotypes. Typical ecotypes are P. mongolica f. purpurea （Fp）, P. mongolica f. rubra （Fr） and P. mongolica f. viridis （Fv）. Our results show that cone size is clearly not uniform among different ecotypes; the largest cones are found in the Fv ecotype and the smallest in Fp. There were also distinct differences between these ecotypes in terms of height and length of squama. At the molecular level, the zymograms of peroxidase and lipase prove the existence of different ecotypes in P. mongolica. The results are useful for investigating and managing this rare spruce species in china.

关键词： Picea mongolica W. D. xu intraspecific diversity adaptive differentiation ecotype

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Pressure-dependent band-bending in ZnO:A near-ambient-pressure X-ray photoelectron spectroscopy study

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Journal of Energy Chemistry 2021年第9期30卷 25-31页

作者： Zhirui Ma xu lian Kaidi yuan Shuo Sun Chengding Gu Jia lin zhang jing Lyu Jian-Qiang Zhong Lei liu Hexing li Wei Chen Department of Physics Hangzhou Normal UniversityHangzhou 310036China Department of Chemistry National University of Singapore3 Science Drive 3117543 Singapore Center for Advanced 2D Materials National University of Singapore117546 Singapore School of Physical Science and Technology ShanghaiTech University201210 ShanghaiChina state key laboratory of Luminescence and Applications Changchun Institute of OpticsChinese Academy of SciencesNo.3888 Dongnanhu RoadChangchun 130033China key laboratory of Resource Chemistry of Ministry of Education College of Chemistry and Materials ScienceShanghai Normal University200234 ShanghaiChina Department of Physics National University of Singapore2 Science Drive 3117542 Singapore Joint School of National university of Singapore and Tianjin university International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China

ZnO-based catalysts have been intensively studied because of their extraordinary performance in lower olefin synthesis,methanol synthesis and water-gas shift ***,how ZnO catalyzes these reactions are still not well ***,we investigate the activations of CO_(2),O_(2)and CO on single crystalline ZnO polar surfaces at room temperature,through in-situ near-ambient-pressure X-ray photoelectron spectroscopy(NAP-XPS).It is revealed that O_(2)and CO_(2)can undergo chemisorption on ZnO polar surfaces at elevated *** the ZnO(0001)surface,molecular CO_(2)(O_(2))can chemically interact with the top layer Zn atoms,leading to the formation of CO_(2)^(δ-)(O_(2)^(δ-))or partially dissociative atomic oxygen(O-)and hence the electron depletion layer in ***,an apparent upward band-bending in ZnO(0001)is observed under the CO_(2)and O_(2)*** the ZnO(0001)surface,the molecular chemisorbed CO_(2)(O_(2))mainly bond to the surface oxygen vacancies,which also results in an upward bandbending in ZnO(0001).In contrast,no band-bending is observed for both ZnO polar surfaces upon CO *** electron-acceptor nature of the surface bounded molecules/atoms is responsible for the reversible binding energy shift of Zn 2 p_(3/2)and O 1 s in *** findings can shed light on the fundamental understandings of CO_(2)and O_(2)activation on ZnO surfaces,especially the role of ZnO in heterogeneous catalytic reactions.

关键词： Near-ambient-pressure X-ray photoelectron spectroscopy Zinc oxide Carbon dioxide and oxygen activation Band-bending

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Empirical Research in software engineering -- A literature Survey

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Journal of Computer Science & Technology 2018年第5期33卷 876-899页

作者： li zhang Jia-Hao Tian jing Jiang Yi-Jun liu Meng-yuan Pu Tao Yue state key laboratory of software Development Environment Beihang University Beijing 100191 China College of software Beihang University Beijing 100191 China Simula Research laboratory Martin Lingesvei 25 1364 Fornebu Norway

Empirical research is playing a significant role in software engineering （SE）, and it has been applied to evaluate software artifacts and technologies. There have been a great number of empirical research articles published recently. There is also a large research community in empirical software engineering （ESE）. In this paper, we identify both the overall landscape and detailed implementations of ESE, and investigate frequently applied empirical methods, targeted research purposes, used data sources, and applied data processing approaches and tools in ESE. The aim is to identify new trends and obtain interesting observations of empirical software engineering across different sub-fields of software engineering. We conduct a mapping study on 538 selected articles from January 2013 to November 2017, with four research questions. We observe that the trend of applying empirical methods in software engineering is continuously increasing and the most commonly applied methods are experiment, case study and survey. Moreover, open source projects are the most frequently used data sources. We also observe that most of researchers have paid attention to the validity and the possibility to replicate their studies. These observations are carefully analyzed and presented as carefully designed diagrams. We also reveal shortcomings and demanded knowledge/strategies in ESE and propose recommendations for researchers.

关键词： empirical software engineering empirical method systematic mapping study

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