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PREPARATIoN oF NANoMETER ZINC oXIDE By EVAPoRATIoN METHoD

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Acta Metallurgica Sinica(English Letters) 2002年第6期15卷 499-504页

作者： A.A.A. Saleh, X.J. zhai, y.C. zhai and y. FuSchool of Materials and Metallurgy, Northeastern University, Shenyang 110004, China School of Materials and Metallurgy Northeastern University

Nanometer Zno particles were synthesized by evaporating of zinc powders of averageparticle size of 370μm studied by XRD, TEM and electron diffraction. The particleswere formed by the oxidation of evaporated zinc vapor in the air. It was found that the particles range from 70 to 100nm in average particle size. The effect of experimental parameters was investigated, the increase of the air flow-rates reduced the average particle size, while increasing the evaporation temperature and the amount of metal charged increased the average particle size. TEM of the particles collected showed that the crystal habits of particles have a tetrapod-like of wurtzite structure consists of four needle crystals. It was found by electron diffraction that all particles were single crystal.

关键词： evaporation method nanometer Zno needle or tetrapod

Electronic Correlation and Pseudogap-Like Behavior of High-Temperature Superconductor La_(3)Ni_(2)o_(7)

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Chinese Physics Letters 2024年第8期41卷 82-93页

作者： yidian Li Xian Du yantao Cao Cuiying Pei Mingxin Zhang Wenxuan Zhao Kaiyi zhai Runzhe Xu Zhongkai Liu Zhiwei Li Jinkui Zhao Gang Li yanpeng Qi Hanjie Guo yulin Chen Lexian yang State Key Laboratory.of Low Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China Key Lab for Magnetism and Magnetic Materials of the Ministry.of Education Lanzhou UniversityLanzhou 730000China Songshan Lake Materials Laboratory Dongguan 523808China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China ShanghaiTech Laboratory for Topological Physics Shanghai 200031China Shanghai Key Laboratory.of High-Resolution Electron Microscopy ShanghaiTech UniversityShanghai 201210China Department of Physics Clarendon LaboratoryUniversity of OxfordParks RoadOxford OX13PUUK Frontier Science Center for Quantum Information Beijing 100084China

High-temperature superconductivity(HTSC)remains one of the most challenging and fascinating mysteries in condensed matter ***,superconductivity with transition temperature exceeding liquid-nitrogen temperature is discovered in La_(3)Ni_(2)o_(7) at high pressure,which provides a new platform to explore the unconventional *** this work,using high-resolution angle-resolved photoemission spectroscopy and ab initio calculation,we systematically investigate the electronic structures of La_(3)Ni_(2)o_(7) at ambient *** experiments are in nice agreement with ab initio calculations after considering an orbital-dependent band renormalization *** strong electron correlation effect pushes a flat band of d_(z^(2))𝑧2 orbital component below the Fermi level(E_(F)),which is predicted to locate right at E_(F) under high ***,the d_(x^(2)−y^(2)) band shows pseudogap-like behavior with suppressed spectral weight and diminished quasiparticle peak near E_(F).our findings provide important insights into the electronic structure of La_(3)Ni_(2)o_(7),which will shed light on understanding of the unconventional superconductivity in nickelates.

关键词： effect superconductivity orbital

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楸木板材干燥含水率时间序列仿真分析与预测

西北林学院学报 2024年第1期39卷 223-227,255页

作者：吴凤霞尤广林邓广明孙建平广西大学资源环境与材料学院广西南宁530004 华鹤集团华鹤家具有限公司黑龙江齐齐哈尔161005

对楸木板材常规窑干过程中含水率时间序列进行仿真分析,研究干燥过程中木材含水率的实时监控和预测。首先分析楸木板材干燥含水率随时间的变化特征,并通过三阶多项式对其进行拟合分析,然后利用人工神经网络构建模型模拟仿真分析,并利用... 详细信息

对楸木板材常规窑干过程中含水率时间序列进行仿真分析,研究干燥过程中木材含水率的实时监控和预测。首先分析楸木板材干燥含水率随时间的变化特征,并通过三阶多项式对其进行拟合分析,然后利用人工神经网络构建模型模拟仿真分析,并利用构建的模型对木材干燥含水率进行预测。结果表明,常规干燥木材含水率呈非线性下降趋势,多项式拟合构建含水率与时间的定标函数为y=60.7155-0.0595x-0.0004256x2+0.0000006496x3,函数拟合仿真与实测值误差较大;构建拓扑结构为6×8×1的BP神经网络模型对含水率时间序列仿真结果最大误差为2.87%,利用训练好的网络模型预测含水率,平均误差为3.63%,最大误差为11.15%,最小误差为0.04%,25个样本中3个样本预测误差超过10%,其余22个样本的预测误差都小于9%;木材干燥含水率时间序列仿真分析和预测局域较大误差发生在含水率波动较大的区域,可以利用构建的BP神经网络对楸木干燥含水率进一步预测。

关键词：木材干燥含水率神经网络仿真分析

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EXPERIMENTAL STUDy.oF VELoCITy DISTRIBUTIoNS IN THE TRANSITIoN REGIoN oF PIPES

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Journal of Hydrodynamics 2011年第5期23卷 643-648页

作者： LIU yong-hui DU guang-sheng LIU Li-ping SHAo Zhu-feng zhai Cheng-yuan School of Energy and Power Engineering -Shandong University Jinan 250061 China

The accuracy.of an ultrasonic flowmeter meaurement depends on the profile-linear average velocity. But this velocity in the transition region is not available at the present. In this article, the velocity in the transition region in pipes is studied by experimental methods. The Particle Image Velocimetry （ PIV ） is used to measure the flow field in the transition region in pipes, and the measured results from PIV are in good agreement with the Westerwell＇s experimental data. Based on the experimental data of PIV, the curves of the profile-linear average velocity in the transition region against the Rey.olds number in the range from 2 000 to 20 000 are obtained, and it is shown that the coefficient k is constant when the Rey.olds number is in the range of 2 000-2 400 and 6 000-20 000, and the coefficient k is increasing when the Rey.olds number is in the range of 2 400-6 000. The results of this article can be used to improve the measurement accuracy.of the ultrasonic flowmeters and as a theoretical basis for the research on the transition flow.

关键词： ultrasonic flowmeter Particle Image Velocimetry (PIV) the profile-linear average velocity transition region pipe

大学生手机冷落行为对社会心态的影响及其作用机制

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中国临床心理学杂志 2024年第1期32卷 177-181页

作者：何安明翟培培惠秋平信阳师范大学教育科学学院信阳464000

目的:探讨大学生手机冷落行为对社会心态的影响及其作用机制。方法:采用手机冷落行为量表、社会支持量表、青少年感恩量表和中国人社会心态量表对1926名大学生进行问卷调查。结果:(1)在控制性别、家庭所在地和主观社会经济地位之后,手... 详细信息

目的:探讨大学生手机冷落行为对社会心态的影响及其作用机制。方法:采用手机冷落行为量表、社会支持量表、青少年感恩量表和中国人社会心态量表对1926名大学生进行问卷调查。结果:(1)在控制性别、家庭所在地和主观社会经济地位之后,手机冷落行为显著负向影响大学生社会心态;(2)加入社会支持作为中介变量后,手机冷落行为仍显著负向影响其社会心态,社会支持起部分中介作用;(3)感恩调节了“手机冷落行为→社会支持→社会心态”这一中介作用的后半段路径。结论:大学生手机冷落行为通过影响社会支持进而影响社会心态,高水平感恩能够增强社会支持对大学生社会心态的积极影响。

关键词：手机冷落行为社会心态社会支持感恩大学生

儿童费城染色体样急性淋巴细胞白血病的临床分析

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中国实验血液学杂志 2024年第1期32卷 78-84页

作者：李天丹胡绍燕翟宗陈广华卢俊何海龙肖佩芳李捷王易苏州大学附属儿童医院血液科苏州大学附属第一医院、江苏省血液研究所江苏苏州215000

目的:探讨具有治疗靶点的儿童费城染色体样急性淋巴细胞白血病(Ph-like ALL)的临床特点、分子学特征、治疗及预后。方法:2017年12月至2021年6月在苏州大学附属儿童医院初诊且具备靶向药物治疗靶点的儿童Ph-like ALL共27例,回顾性分析患... 详细信息

目的:探讨具有治疗靶点的儿童费城染色体样急性淋巴细胞白血病(Ph-like ALL)的临床特点、分子学特征、治疗及预后。方法:2017年12月至2021年6月在苏州大学附属儿童医院初诊且具备靶向药物治疗靶点的儿童Ph-like ALL共27例,回顾性分析患儿年龄、性别、初诊时白细胞计数、遗传学特征、分子生物学改变、化疗方案、给予不同靶向药物、d 19微小残留病(MRD)、d 46 MRD、是否行造血干细胞移植(HSCT)等资料,归纳总结患儿的临床特征及治疗效果。采用Kaplan-Meier方法进行生存分析。结果:27例患儿均根据诱导缓解治疗过程中MRD水平调整化疗强度,10例在治疗过程中加用靶向药,3例患儿桥接HSCT,其中1例死亡,2例存活。24例未行HSCT患儿中,1例患儿出现复发,采用嵌合抗原受体T细胞(CAR-T)治疗后达完全缓解(CR)。27例患儿3年总生存率为(95.5±4.4)%,3年无复发生存率为(95.0±4.9)%,3年无事件生存率为(90.7±6.3)%。结论:基于MRD监测的危险度分层化疗可改善Ph-like ALL患儿预后,对化疗效果欠佳的患儿联合靶向药可尽快完全缓解,诱导缓解治疗过程中MRD持续阳性的Ph-like ALL患儿序贯CAR-T和HSCT能显著提高治疗效果。

关键词：儿童费城染色体样急性淋巴细胞白血病靶向药 CAR-T 造血干细胞移植

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

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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.Boy.o 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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定量核磁共振法测定帕瑞昔布钠的质量分数

中国新药杂志 2024年第12期33卷 1277-1280页

作者：冯玉飞马玲云关皓月刘倩杨东升翟晨斐张广超牛剑钊中国食品药品检定研究院北京100050

目的:建立采用^(1)H定量核磁共振波谱法(^(1)H qNMR)测定帕瑞昔布钠对照品质量分数的方法。方法:在^(1)H qNMR中,使用Bruker Ascend 600超导核磁共振谱仪,以氘代二甲基亚砜为溶剂,采用zg30脉冲序列,弛豫延迟时间为30 s,扫描次数为64次... 详细信息

目的:建立采用^(1)H定量核磁共振波谱法(^(1)H qNMR)测定帕瑞昔布钠对照品质量分数的方法。方法:在^(1)H qNMR中,使用Bruker Ascend 600超导核磁共振谱仪,以氘代二甲基亚砜为溶剂,采用zg30脉冲序列,弛豫延迟时间为30 s,扫描次数为64次。结果:以帕瑞昔布钠δ7.74的氢质子响应信号作为样品定量信号,以马来酸δ6.23的氢质子响应信号作为内标物定量信号。样品内标物信号响应面积比与质量比的线性回归方程为y=0.2962x-0.0010,相关系数为0.9997,重复性实验的RSD为0.15%(n=6)。测得帕瑞昔布钠(以C_(19)H_(17)N_(2)o_(4)S^(-)计)的质量分数为93.91%,与质量平衡法(93.83%,按C_(19)H_(17)N_(2)o_(4)S^(-)计)、HPLC外标一点法(93.89%)结果一致。结论:本文建立的核磁定量方法可用于帕瑞昔布钠的质量分数测定,该方法准确、快速,并为质量平衡法对标准物质定值提供有力佐证。

关键词： ^(1)H定量核磁共振波谱法质量分数测定标准物质帕瑞昔布钠

Fine Structural and Carbon Source Analysis for Diamond Crystal Growth using an Fe-Ni-C System at High Pressure and High Temperature

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Chinese Physics Letters 2012年第4期29卷 229-231页

作者： FAN Xiao-Hong XU Bin NIU Zhen zhai Tong-guang TIAN Bin School of Material Science and Engineering Shandong UniversityJi’nan 250101 School of Materials Science and Engineering Shandong Jianzhu UniversityJi’nan 250101 Department of Chemical and Materials Engineering University of KentuckyLexingtonUSA

Diamond is synthesized in an Fe-Ni-C system at high pressure and high temperature,the C sp^(3) content profile through different thicknesses of interface between diamond and the catalyst film is measured by using electron energy loss *** is found that the Csp^(3) content varies from 87.33% to 78.15% when the measured position is located at the inner face near the diamond and then changes to 6 μm further *** electron microscope examinations show that there are different phases in the interface,such as Fe3C,γ-(Fe,Ni),and graphite,but the graphite phase diminishes gradually towards the inner face of the *** results profoundly indicate that the carbon atoms,required for diamond growth,could only come from the carbon-rich phase,Fe3C,but not directly from the *** is possible that carbon atoms from the graphite in the interface first react with Fe atoms to produce carbide Fe3 C during diamond synthesis at high pressure and high *** Fe3 C finally decomposes into carbon atoms with the sp^(3) electron state at the interface to form the diamond.

关键词： spectroscopy carbide Diamond