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空位扩散诱导点缺陷环与富Cu相的相互作用

稀有金属材料与工程 2024年第3期53卷 834-840页

作者：裴嘉琪侯华杨文奎赵宇宏中北大学山西太原030051 教育部共建高性能铝/镁合金材料开发及应用协同创新中心山西太原030051 北京科技大学北京市材料基因工程高精尖创新中心北京100083 太原科技大学山西太原030024

辐照诱导产生的点缺陷会加速核电站材料微观组织的演变,在很大程度上影响反应堆的寿命。本研究基于相场法的四元连续相场模型,耦合了空位和间隙原子,利用该模型模拟了Fe-15%Cu-1%Ni-1%Mn(原子分数)合金在空位扩散机制下的相分离,研究了... 详细信息

辐照诱导产生的点缺陷会加速核电站材料微观组织的演变,在很大程度上影响反应堆的寿命。本研究基于相场法的四元连续相场模型,耦合了空位和间隙原子,利用该模型模拟了Fe-15%Cu-1%Ni-1%Mn(原子分数)合金在空位扩散机制下的相分离,研究了点缺陷与富Cu相的相互作用机制。结果表明,空位和间隙原子会促进富Cu相的长大和粗化,点缺陷浓度的升高会促进相分离,加快析出相的失稳分解速率,并且升高温度会延缓Cu原子和空位环的生长和粗化,点缺陷也可以增加一定的屈服强度,为探究空位扩散机制影响抗辐照材料性能方面提供了新的思路。

关键词：相场法点缺陷富Cu析出相空位间隙原子

L-Ergothioneine ameliorates MPTP-induced Parkinson's disease in C57BL/6J mice by activating DJ-1

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Food Science and Human Wellness 2024年

作者： Xianshe Meng# Huawen Meng# Shuzeng hou Zequn yin Xuerui Wang Ke Gong Feng Zhang Qingshan Li Shuang Zhang yuanli Chen Xiaoxiao yang Zhiwei Zhao Chenzhong Liao yajun Duan Department of Cardiology， the First Affiliated Hospital of USTC， Division of Life Sciences and Medicine， University of Science and Technology of China Key Laboratory of Metabolism and Regulation for Major Diseases of Anhui Higher Education Institutes， Hefei University of Technology

Parkinson’s disease (PD) is one of the most common neurodegenerative diseases. The loss of dopaminergic (DAergic) neurons in the substantia nigra and the decrease of dopamine (DA) levels accelerate the process of PD. L-Ergothioneine (EGT) is a natural antioxidant derived from microorganisms， especially in edible mushrooms. EGT can penetrate blood-brain barrier and its levels are significantly decreased in the plasma of PD patients. Therefore， we speculated that EGT could ameliorate PD， and determined its effect on PD development by using 1-methyl-4-phenyl-1，2，3，6-tetrahydropyridine (MPTP)-induced PD mouse models and neurotoxin 1-methyl-4-phenylpyridinium (MPP+)-induced cell models. Our results show that EGT alleviated MPTP-induced behavioral dysfunction in mice. Mechanistically， we innovatively revealed that EGT is a key regulator of DJ-1. EGT restored DA levels by activating the DJ-1-Nuclear receptor-related factor 1(Nurr1) axis. Furthermore， it reduced reactive oxygen species (ROS) levels by regulating the DJ-1-Nuclear factor erythroid 2-related factor 2 (Nrf2) pathway， which inhibited oxidative stress-induced DAergic neuronal apoptosis. Combined treatment with DJ-1-siRNA transfection revealed that blocking DJ-1 reversed EGT upregulated Nurr1 and Nrf2 expression in the nucleus， which significantly decreased the benefits of EGT. Taken together， our study suggests that EGT can ameliorate PD and be considered as a strategy for PD treatment.

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Experimental Hamiltonian Learning of an 11-Qubit Solid-State Quantum Spin Register

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Chinese Physics Letters 2019年第10期36卷 11-16页

作者： P.-y.hou L.He F.Wang X.-Z.Huang W.-G.Zhang X.-L.Ouyang X.Wang W.-Q.Lian X.-y.Chang L.-M.Duan Center for Quantum Information Institute for Interdisciplinary Information SciencesTsinghua UniversityBeijing 100084

Learning the Hamiltonian of a quantum system is indispensable for prediction of the system dynamics and realization of high fidelity quantum ***,it is a significant challenge to efficiently characterize the Hamiltonian which has a Hilbert space dimension exponentially growing with the system ***,we develop and implement an adaptive method to learn the effective Hamiltonian of an 11-qubit quantum system consisting of one electron spin and ten nuclear spins associated with a single nitrogen-vacancy center in a *** validate the estimated Hamiltonian by designing universal quantum gates based on the learnt Hamiltonian and implementing these gates in the *** experimental result demonstrates a well-characterized 11-qubit quantum spin register with the ability to test quantum algorithms,and shows our Hamiltonian learning method as a useful tool for characterizing the Hamiltonian of the nodes in a quantum network with solid-state spin qubits.

关键词： Hamiltonian quantum system

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水源区生态环保与污染控制分析

皮革制作与环保科技 2024年第9期5卷 61-63页

作者：侯政益侯雨萌甘南州环境污染源监控中心甘肃甘南747000 中核龙安有限公司甘肃甘南747000

本文简要介绍了水源区的生态保护与污染控制,分析水源区存在的一些生态及污染问题,如土地和森林资源遭破坏、生物多样性减少、工业和农业污染、生活污水和垃圾排放等。围绕水源区生态保护区的建设管理、生态环境治理工作的落实、生态补... 详细信息

本文简要介绍了水源区的生态保护与污染控制,分析水源区存在的一些生态及污染问题,如土地和森林资源遭破坏、生物多样性减少、工业和农业污染、生活污水和垃圾排放等。围绕水源区生态保护区的建设管理、生态环境治理工作的落实、生态补偿机制的完善等,探讨相应的应对策略。

关键词：水源区生态环保污染控制

用甲胎蛋白及钆塞酸增强MRI特征对亚厘米肝细胞肝癌的诊断算法

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国际医学放射学杂志 2024年第3期 377-378页

作者： P.Huang F.Wu K.hou C.Zhou y.Xiao C.Wang 吴玉平

摘要目的探讨血清甲胎蛋白（AFP）在钆塞酸增强MRI(EOB-MRI)上诊断亚厘米肝细胞癌（HCC）中的作用。方法回顾性纳入2017年1月—2023年3月在EOB-MRI上进行

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Corrosion behavior of 13Cr stainless steel under stress and crevice in high pressure CO_(2)/O_(2)environment

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Journal of Materials Science & Technology 2021年第29期88卷 79-89页

作者： G.y.Zhu y.y.Li B.S.hou Q.H.Zhang G.A.Zhang Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Materials Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan430074China

In this work,through the self-developed setup for in situ electrochemical tests,the corrosion behavior of 13 Cr stainless steel under the combined effect of stress and crevice in high pressure CO_(2)/O_(2)environment was *** results show that 13 Cr stainless steel presents a self-passivation *** the action of stress,the anodic dissolution process of steel inside crevice is *** is a galvanic effect between the stressed steel inside crevice and the unstressed steel outside *** applied stress reduces the induction stage of crevice corrosion and induces a larger galvanic current,i.e.,the applied stress promotes the development of crevice ***,adding 0.1 MPa O_(2)is conducive to forming a more stable passive film but causes a greater galvanic effect.

关键词： Stainless steel Crevice corrosion Stress corrosion Galvanic effect

Determination of the number ofψ(3686)events taken at BESⅢ

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Chinese Physics C 2024年第9期48卷 8-20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 G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen H.y.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 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.Ding X.X.Ding y.Ding y.Ding J.Dong L.y.Dong M.y.Dong X.Dong M.C.Du S.X.Du y.y.Duan Z.H.Duan P.Egorov y.H.Fan J.Fang J.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 M.Fritsch C.D.Fu J.L.Fu y.W.Fu H.Gao X.B.Gao y.N.Gao yang Gao S.Garbolino I.Garzia L.Ge P.T.Ge Z.W.Ge C.Geng E.M.Gersabeck A.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 F.Hanisch 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 S.L.Hu T.Hu y.Hu G.S.Huang K.X.Huang L.Q.Huang X.T.Huang y.P.Huang T.Hussain F.Hölzken N.Hüsken N.in der Wiesche 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 N.Kumar A.Kupsc W.Kühn J.J.Lane P.Larin L.Lavezzi T.T.Lei Z.H.Lei M.Lellmann T.Lenz C.Li C.Li C.H.Li Cheng Li D.M.Li F.Li G.Li H.B.Li H.J.Li H.N.Li Hui Li J.R.Li J.S.Li Ke 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.Z.Li Xi Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780BochumGermany 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 Road54000LahorePakistan Fudan University Shanghai 200433China GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute Mainz Staudinger Weg 18D-55099MainzGermany 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 (A)INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly(B)INFN Sezione di PerugiaI-06100PerugiaItaly(C)University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara (A)INFN Sezione di FerraraI-44122FerraraItaly(B)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 Alta Investigación Universidad de TarapacáCasilla 7DArica 1000000Chile Jilin University Changchun 130012China Joha

The number ofψ(3686)events collected by the BESⅢdetector during the 2021 run period is determined to be(2259.3±11.1)×10~6 by counting inclusiveψ(3686)hadronic *** uncertainty is systematic and the statistical uncertainty is ***,the numbers ofψ(3686)events collected during the 2009 and 2012run periods are updated to be(107.7±0.6)×10~6 and(345.4±2.6)×10~6,*** numbers are consistent with the previous measurements within one standard *** total number ofψ(3686)events in the three data samples is(2712.4±14.3)×10~6.

关键词： ψ(3686) inclusive process Hadronic events BESⅢdetector

青稞条纹病原菌遗传多样性及其致病性差异分析

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分子植物育种 2024年第17期22卷 5725-5735页

作者：康胜华赵珂侯璐青海大学农林科学院(青海省农林科学院) 青海省农业有害生物综合治理重点实验室西宁810016

条纹病是重要的种传真菌病害之一,能对青稞生产造成严重产量损失。为明确分布于青海的青稞条纹病原菌致病性差异及遗传多样性,本研究比较了分离自青海省不同地区18个条纹菌菌株形态特征差异,利用rDNA-ITS序列分析菌株间遗传多样性,同时... 详细信息

条纹病是重要的种传真菌病害之一,能对青稞生产造成严重产量损失。为明确分布于青海的青稞条纹病原菌致病性差异及遗传多样性,本研究比较了分离自青海省不同地区18个条纹菌菌株形态特征差异,利用rDNA-ITS序列分析菌株间遗传多样性,同时测定了病菌致病性变异情况。青稞条纹病原菌于PDA培养基上菌落颜色多样,菌落质地的疏松度和边缘的规则程度都有一定的差异;在PDA培养基上不能产生分生孢子;菌株培养7 d后菌落直径范围为27.4~81.1 mm,菌株的生长速度存在显著差异。致病性分化结果显示,条纹病原菌株对青稞品种的致病性存在差异,可将18个测试菌株分成2个组,且致病性与病菌地区来源无明显相关性。依据系统进化树分析结果,在欧氏距离为9.58时将18个菌株分成2个亚组,说明条纹菌遗传多样性水平较低。菌株间亲缘关系与其来源地区无明显相关性,说明条纹病原菌在不同地区存在较多的交流。本研究能为青稞条纹病的防治和后续研究中菌株的选择提供理论依据。

关键词：麦类核腔菌青稞条纹病遗传多样性致病性

Orientation dependence of mechanically induced grain boundary migration in nano-grained copper

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Journal of Materials Science & Technology 2021年第9期68卷 30-34页

作者： J.X.hou X.y.Li K.Lu Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of China.Hefei 230026China

Tensile tests were carried out on gradient nanograined copper samples to investigate the grain orientation dependence of mechanically induced grain boundary migration(GBM) process. The relationship between GBM and the orientations of nanograins relative to loading direction was established by using electron backscatter diffraction. GBM is found to be more pronounced in the grains with higher Schmid factors where dislocations are easier to slip. As a result, the fraction of high angle grain boundaries decreases and that of low angle grain boundaries increases after GBM.

关键词： Grain boundary migration Orientation dependence Texture Nano-grain Copper