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Amplitude analysis of the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)

Chinese Physics C 2024年第8期48卷 6-33页

作者： M.Ablikim M.N.Achasov P.Adlarson O.Afedulidis x.C.Ai R.Aliberti A.Amoroso Q.An y.Bai O.Bakina I.Balossino y.Ban H.-R.Bao V.Batozskaya K.Begzsuren N.Berger M.Berlowski M.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai x.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin J.F.Chang W.L.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen M.L.Chen S.J.Chen S.L.Chen S.M.Chen T.Chen x.R.Chen x.T.Chen y.B.Chen y.Q.Chen Z.J.Chen Z.y.Chen S.K.Choi x.Chu G.Cibinetto F.Cossio J.J.Cui H.L.Dai J.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich C.Q.Deng Z.y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori B.Fang S.S.Fang W.x.Fang y.Fang y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng J.H.Feng y.T.Feng K.Fischer M.Fritsch C.D.Fu J.L.Fu y.W.Fu H.Gao y.N.Gao yang Gao S.Garbolino I.Garzia P.T.Ge Z.W.Ge C.Geng E.M.Gersabeck B.Ding x.x.Ding y.Ding y.Ding J.Dong L.y.Dong M.y.Dong x.Dong M.C.Du S.x.Du Z.H.Duan P.Egorov y.H.Fan J.Fang JA.Gilman K.Goetzen L.Gong W.x.Gong W.Gradl S.Gramigna M.Greco M.H.Gu y.T.Gu C.y.Guan Z.L.Guan A.Q.Guo L.B.Guo M.J.Guo R.P.Guo y.P.Guo A.Guskov J.Gutierrez K.L.Han T.T.Han x.Q.Hao F.A.Harris K.K.He K.L.He F.H.Heinsius C.H.Heinz y.K.Heng C.Herold T.Holtmann P.C.Hong G.y.Hou x.T.Hou y.R.Hou Z.L.Hou B.y.Hu H.M.Hu J.F.Hu T.Hu y.Hu G.S.Huang K.x.Huang L.Q.Huang x.T.Huang y.P.Huang T.Hussain F.H\"olzken N.H\"usken N.in der Wiesche M.Irshad J.Jackson S.Janchiv J.H.Jeong Q.Ji Q.P.Ji W.Ji x.B.Ji x.L.Ji y.y.Ji x.Q.Jia Z.K.Jia D.Jiang H.B.Jiang P.C.Jiang S.S.Jiang T.J.Jiang x.S.Jiang y.Jiang J.B.Jiao J.K.Jiao Z.Jiao S.Jin y.Jin M.Q.Jing x.M.Jing T.Johansson S.Kabana N.Kalantar-Nayestanaki x.L.Kang x.S.Kang M.Kavatsyuk B.C.Ke V.Khachatryan A.Khoukaz R.Kiuchi O.B.Kolcu B.Kopf M.Kuessner x.Kui A.Kupsc W.K\"uhn J.J.Lane P.Larin L.Lavezzi T.T.Lei Z.H.Lei H.Leithoff M.Lellmann T.Lenz C.Li C.Li C.H.Li Cheng Li D.M.Li F.Li G.Li H.Li H.B.Li H.J.Li H.N.Li Hui Li J.R.Li J.S.Li K.Li L.J.Li L.K.Li Lei Li M.H.Li P.R.Li Q.M.Li Q.x.Li R.Li S.x.Li T.Li W.D.Li W.G.Li x.Li x.H.Li x.L.Li x.y.Li y Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780 BochumGermany Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of Advanced Science and Technology Beijing 100190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of Science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN Laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN Laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN Sezione di Ferrara University of FerraraI-44122FerraraItaly Inner Mongolia University Hohhot 010021China Institute of Modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 GeV with the BESIII detector,a joint amplitude analysis is performed on the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).The fit fractions of individual components are obtained,and large interferences among the dominant components of the decays D^(0)→a_(1)(1260)π,D^(0)→π(1300)π,D^(0)→ρ(770)ρ(770),and D^(0)→2(ππ)_(S)are observed in both *** the obtained amplitude model,the CP-even fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branching fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of D^(0)→4πwhen used to determine the CKM angleγ(ϕ_(3))via the B^(−)→DK^(−)decay.

关键词： BESIII D^(0)meson decays amplitude analysis CP-even fraction

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Numerical study of convective heat transfer of a supersonic combustor with varied inlet flow conditions

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Acta Mechanica Sinica 2019年第5期35卷 943-953页

作者： W.H.Fan F.Q.Zhong S.G.Ma x.y.zhang State Key Laboratory of High Temperature Gas Dynamics Institute of MechanicsChinese Academy of SciencesBeijing 100190 China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

Characteristics of convective heat transfer of a supersonic model combustor with variable inlet flow conditions were studied by numerical simulation in this *** three-dimensional flow and wall heat flux at different air inlet Mach numbers of 2.2,2.8 and 3.2 were studied numerically with Reynolds-averaged Navier-Stokes equations with a shear-stress transport(SST)k-ωturbulence model and a three-step reaction ***,ethylene was chosen as the fuel,and the fixed fuel-to-air equivalence ratio is 0.8 in all cases in this *** results of the simulations indicate that wall heat flux distribution of the combustor is very non-uniform with several peaks of wall heat flux at varied *** the low inlet Mach number of 2.2,a shock train structure is formed in the isolator,and three peaks of wall heat flux are located respectively on the backward face of the cavity,on the side wall near the fuel injection and on the bottom wall near the injection holes,and a maximum wall heat flux reaches 5.4 MW/*** the medium inlet Mach number of 2.8,there exists a much shorter shock structure with three peaks of wall heat flux similar to that of Mach number ***,as the inlet Mach number increased to 3.2,there is no shock structure upstream of fuel injections,and the combustor flow is in a supersonic mode with different locations and values of wall heat flux *** statistical results of wall heat loading show that the change of total wall heat is not monotonic with the increase of inlet Mach number,and the maximum appears in the case of Mach number being ***,for all the cases,the bottom wall takes up more than 50%of the total heat loading.

关键词： Wall heat flux Numerical simulation Ethylene Supersonic combustor

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Study on time-dependent lattice to alleviate space charge effects in CSNS/RCS

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Radiation Detection Technology and Methods 2019年第1期3卷 50-60页

作者： x.y.zhang L.H.zhang J.y.Tang Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Purpose Tune shift and spread due to the space charge effects and collective instabilities in intense proton synchrotrons,such as the CSNS/RCS,a rapid cycling synchrotron at China Spallation Neutron Source,are the main causes of beam *** shift/spread is large when the beam kinetic energy is low and will cause particles to cross dangerous resonances,while they will gradually decay with the increase of kinetic *** An efficient way,which was verified in operational accelerators,is to tune the working point during different acceleration periods:injection,acceleration and *** the newly added function of time-dependent lattice in the ORBIT code,one can simulate the physical performance with different tune patterns to find the best way to reduce beam *** The method to tune the working point by time-dependent lattice to weaken the crossing of dangerous resonances has been exploited,and implemented in the ORBIT *** is the first of such try to apply the method in CSNS/*** The results presented in this paper show that the time-dependent lattice method does help reduce beam loss in the injection and early acceleration.

关键词： Space charge effects Tune shift ORBIT code Time-dependent lattice Nonlinear magnets Resonance Introduction

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使用深度学习约束压缩感知加速臂丛神经3D MR神经成像

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国际医学放射学杂志 2024年第2期 252-252页

作者： S.x.Hu y.xiao W.L.Peng W.Zeng y.zhang x.y.zhang 潘红利

摘要目的探究深度学习约束压缩感知（DLCS）在提高臂丛神经3D MRI影像质量和采集时间方面的应用。方法研究纳入54名接受增强成像的受试者和41名未接受增强成

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前交叉韧带损伤病人髌股关节不稳定的CT危险因素特征

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国际医学放射学杂志 2024年第2期 249-249页

作者： J.B.Chen x.L.Wu J.y.Guo x.y.zhang J.Z.Zhao G.M.xie 潘红利

摘要目的低估前交叉韧带（ACL）损伤病人伴发髌股关节不稳已引起广泛关注。然而，目前未充分认识复合损伤的特点。该研究旨在描述复合损伤的特征，并确定影像学危

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小动脉征：T4a结肠癌分期的影像学特征

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国际医学放射学杂志 2024年第2期 250-250页

作者： Z.Guan Z.W.Li D.yang T.yu H.J.Jiang x.y.zhang 束宏敏

摘要目的通过分析现有和新提出的pT1-3和pT4a期肿瘤的影像学特征分布，寻找一个显著特征并验证其诊断效能。方法回顾性收集2016年1月—2017年12月共3个中

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The effect of Asia dust outflow on particle number size distribution and optical properties: field campaign on *** in Central East China

The effect of Asia dust outflow on particle number size dist...

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第十二届全国气溶胶会议暨第十三届海峡两岸气溶胶技术研讨会

作者： x.J.Shen J.y.Sun x.y.zhang y.M.zhang T.T.Wang L.zhang Key Laboratory of Atmospheric Chemistry of CMA Institute of Atmospheric CompositionChinese Academy of Meteorological Sciences Heilongjiang Meteorological Administration

In-situ measurements of particle number size distribution and optical parameters(scattering and absorption coefficients), covering the particle size range of 3 nm-2.5 μm, were conducted at Mt. Tai, a mountain top station in Central East China in spring time 2011. During the whole campaign, three episodes with significant influence by the Asia dust outflow were captured. The mean mass concentration of PM2.5 during the dust episode was 63 μg m-3, nearly 2 times as the value for the non-dust period, 33 μg m-3. But the difference in PM1 mass concentration is not significant due to a high proportion(about 50%) of coarse particle in PM2.5 mass on dust days. Although it showed relatively low number concentration of the incoming dust particles, they changed the optical properties and particle volume size distribution significantly. Compared with the non-dust period, the absorption coefficient was increased by 100% during dust period. The angular truncation corrected Nephelometer measurement showed that scattering coefficient was nearly 30% lower on dust period. The ?ngstr?m exponent and single scattering albedo are also altered by the dust particles. The spherical Mie model was applied to simulate the optical properties with reasonable assumptions and was validated through closure analysis for an intensive dust case. Results of calculation suggested that the dust particles particle contributed nearly 20-60% to the aerosol optical properties during the dust outbreak period, with the mean contribution of 30% to scattering and backscattering coefficient and 20% to absorption coefficient, although the number concentration is only several tens per cubic meter.

关键词： Mountain site Dust aerosol optical properties Mie model

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Long-term observation of particle matter concentration by CAWNET in China

Long-term observation of particle matter concentration by CA...

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创新驱动发展提高气象灾害防御能力——第30届中国气象学会年会

作者： y.Q.Wang x.y.zhang J.y.Sun x.C.zhang H.Z.Che y.Li Laboratory of Atmospheric Chemistry Chinese Academy of Meteorological Sciences

The mass concentrations of PM10, PM2.5 and PM1 were investigated simultaneously in 24 stations of CAWNET (China Atmosphere Watch Network) from 2006 to 2012 using GRIMM 180 instruments. The highest PM mass were observed at the stations of Zhengzhou, xiAn and Gucheng in Hua Bei Plain (HBP) of N. China, which is the most serious hazy area of China. For example, the averaged PM10, PM2.5 and PM1 concentrations at Zhengzhou are 149.9, 94.6 and 77.7 μg m 3 , respectively. The second high PM region is in E. China, and then in S. China, with the yangtze River Delta and the Pearl River Delta areas as their major body, respectively. According to the newest air quality standard of China with annual averaged PM10 and PM2.5 mass concentrations of 70 and 35 μg m 3 , 15 stations can meet the PM10 standard and only 7 stations (most are rural and remote stations) have concentration lower than the PM2.5 standard. Due to the large contribution of coarse mineral aerosol in N. China and more secondary aerosol formation in relative warm and humid areas of S. China, the ratios of PM2.5 to PM10 exhibit obviously increasing trend from north to south, with the highest value of 80 - 90% in the yangtze River Delta area. In the stations near the Asian dust source, the ratios are normally less then 50%. The PM1 mass contributed most of PM2.5, accounting over 80% at the most stations. Seasonally, PM concentrations are normally highest in winter and lowest in summer at most stations, with obvious increasing in spring associated with the impact of sand and dust storm (SDS). The decreasing trend followed by increasing trend was observed at xiAn from 2006 to 2012, but the trends are not reproduceted at other stations. It indicates that there is no significant improvement or deterioration trend of air quality with PM in recent years in China.

关键词： particulate matter observation spatial and temporal variation

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Distinct Electrical and Mechanical Responses of a Cu-10Fe Composite Prepared by Hot-Pressed Sintering and Post Treatment

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Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 255-265页

作者： x.y.yue S.y.Peng x.zhang C.N.He y.Z.Tian Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials Tianjin UniversityTianjin300350China Research Centre for Metallic Wires Northeastern UniversityShenyang110819China

A Cu-10wt%Fe composite was prepared through hot-pressed sintering,and the material was subsequently solution *** hot-pressed sintered and solution treated materials were rolled and *** precipitation behavior and performance changes were systematically studied by using scanning electron microscopy and transmission electron *** contrast to the hot-pressed sintered specimen,the solution treatment significantly affects the thermal stability and properties of the Cu-10wt%Fe *** Cu-10wt%Fe composite was prepared after solid solution,cold rolling and aging at 773 K for 1 h,and it obtained excellent tensile strength of 494 MPa,uniform elongation of 16.3%,electrical conductivity of 51.1%IACS and softening temperature of 838 *** for the distinct difference in thermal stability and properties between hot-pressed sintered and solution treated specimens were *** findings provide a theoretical basis for designing high-performance Cu-based in-situ composites by post treatment.

关键词： Cu-Fe composite Hot-pressed sintering Thermal stability Strength Electrical conductivity

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Observation of submicron aerosols at Mount Tai in east China from 2010 to 2012:Impact of different air masses on chemical components and size distribution

Observation of submicron aerosols at Mount Tai in east China...

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十一届全国气溶胶会议暨第十届海峡两岸气溶胶技术研讨会

作者： y.M.zhang x.y.zhang J.y.Sun G.y.Hu x.J.Shen T.T.Wang D.Z.Wang y.Zhao Key Laboratory for Atmospheric Chemistry Chinese Academy of Meteorological Sciences Wu Han University Heilongjiang Province Meteorological Bureau Tai An meteorological bureau

Real-time measurements of non-refractory submicron aerosols(NR-PM1) were conducted using an aerodyne mass spectrometry(Q-AMS) at the summit of Mount Tai(1534m above sea level)in Shandong province, locates in the center of the Central East China(CEC) region, from June 2010 to January 2012, as a part of National basic research project monitoring campaign. The mass concentrations and size distributions of non-refractory submicron particle(NR-PM1) species(i.e., sulfate, nitrate, ammonium, chloride, and organics) were measured in situ at 5-min time resolution. Overall, 146 days valid data was obtained during the whole campaign, which covers four different seasons. The average total mass concentration of NR-PM1 was 42.9 g m-3, with 31%sulfate, 32% organics, 19% nitrate and 18% ammonium. The average mass concentration of NR-PM1 is highest(59.9 g m-3) in summer and lowest(31.9 g m-3) in spring. Species occupied different percentages in different seasons, sulfate in summer, Organics in fall and winter, while nitrate dominants the NR-PM1 in spring respectively. To investigate the size-resolved mass concentrations of aerosol chemical components from different sources, seven air masses were clustered based on the 72 hours back trajectory with HySPLIT model. Cluster I, IV and V with short pathway represent the local and regional sources, and the concentrations from these clusters were higher than that from cluster III and VI which originated from remote and clean North-West sources. According to the results of diurnal cycles for chemical species in NR-PM1 higher at noon and lower at midnight from seven clusters, it was concluded that the site was controlled under the transitions between PBL and FT at daytime and nighttime. The size distributions of chemical species were different from different air masses, cluster I, II, IV, V and VII showed same shape with accumulation mode(500-600nm), the concentration at nighttime is lower than at daytime. For cluster VI and III, it demonstra

关键词： NR-PM1 Chemical species mass concentration Size distribution Mt.Tai

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