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Fluctuating magnetic droplets immersed in a sea of quantum spin liquid

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The Innovation 2023年第5期4卷 33-40页

作者： Zihao Zhu binglin pan Linpeng Nie Jiamin Ni Yanxing Yang Changsheng Chen Chengyu Jiang Yeyu Huang Erjian Cheng Yunjie Yu Jianjian Miao Adrian D.Hilier Xianhui Chen Tao Wu Yi Zhou Shiyan Li Lei Shu State Key Laboratory of Surface Phys ics and Department of PhysicsFudan UniversityShanghai 200433China CAS Key Laboratory of Stronglycoupled Quantum Matter Physics Department of PhysicsUniversity of Science and Technology of ChinaHefeiAnhui 230026China Department of Physics the University of Hong KongHong KongChina ISIS Pulsed Neutron and Muon Source STFC Rutherford Appleton LaboratoryHarwell CampusDidcotOxfordshire 0X110QXUK Collaborative Innovation Center of Advanced Micr ostructures Nanjing 210093China CAS Center for Excellence in Superconducting Electronics(CENSE) Shanghai 200050China Institute of Physics and Beijing National Laboratory for Condensed Matter Physics Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory DongguanGuangdong 523808China Kavli Institute for Theoretical Sciences and CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China Shanghai Research Center for Quantum Sciences Shanghai 201315China

The search of quantum spin liquid(QSL),an exotic magnetic state with strongly fluctuating and highly entangled spins down to zero temperature,is a main theme in current condensed matter ***,there is no smoking gun evidence for deconfined spinons in any QSL candidate so *** disorders and competing exchange interactions may prevent the formation of an ideal QSL state on frustrated spin *** we report comprehensive and systematic measurements of the magnetic susceptibility,ultralow-temperature specific heat,muon spin relaxation(μSR),nuclear magnetic resonance(NMR),and thermal conductivity for NaYbSe2 single crystals,in which Yb3+ions with effective spin-1/2 form a perfect triangular *** these complementary techniques find no evidence of long-range magnetic order down to their respective base ***,specific heat,μSR,and NMR measurements suggest the coexistence of quasi-static and dynamic spins in *** scattering from these quasi-static spins may cause the absence of magnetic thermal ***,we propose a scenario of fluctuating ferrimagnetic droplets immersed in a sea of *** may be quite common on the way pursuing an ideal QSL,and provides a brand new platform to study how a QSL state survives impurities and coexists with other magnetically ordered states.

关键词： NMR immersed quantum

间伐对光皮桦人工林生长及土壤化学性质的影响

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北华大学学报（自然科学版） 2020年第3期21卷 398-404页

作者：潘秉林王振宇杨梅刘世男广西壮族自治区国有雅长林场广西百色533209 广西大学林学院广西南宁530004

以广西国有雅长林场13 a生光皮桦为研究对象,设置不同强度间伐试验(对照:未间伐,弱度间伐:16.9%,中度间伐:26.4%,强度间伐:46.2%),探讨间伐5 a后光皮桦人工林生长及土壤理化性质变化.结果显示:抚育间伐能够显著促进光皮桦胸径和单株材... 详细信息

以广西国有雅长林场13 a生光皮桦为研究对象,设置不同强度间伐试验(对照:未间伐,弱度间伐:16.9%,中度间伐:26.4%,强度间伐:46.2%),探讨间伐5 a后光皮桦人工林生长及土壤理化性质变化.结果显示:抚育间伐能够显著促进光皮桦胸径和单株材积增长,改善林分径级结构.与对照相比,不同间伐强度下林分平均胸径分别增加了3.8%、5.0%、7.5%,单株材积分别增加了1.1%、1.5%、2.2%.但间伐显著降低了光皮桦林分蓄积量,且对林分树高生长无显著影响;显著降低了光皮桦林土壤全磷、全钾、速效磷和速效钾含量,但土壤中全氮含量随间伐强度的增大有所增加,土壤铵态氮含量略有下降,但影响不显著.不同间伐强度作用下,0~40 cm土层土壤中土壤酶活性表现出先增加后减小的趋势.中度间伐(26.4%)既有利于提高土壤理化性质、酶活性,促进林分生长,又可以对光照、土壤等进行合理有效利用,是最适合光皮桦人工林抚育的间伐强度.

关键词：抚育间伐光皮桦林分生长土壤理化性质

Deep learning autofluorescence-harmonic microscopy

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Light(Science & Applications) 2022年第4期11卷 697-710页

作者： binglin Shen Shaowen Liu Yanping Li Ying pan Yuan Lu Rui Hu Junle Qu Liwei Liu Key Laboratory of Optoelectronic Devices and Systems of Guangdong Province and Ministry of Education College of Physics and Optoelectronic EngineeringShenzhen University518060 ShenzhenChina Shenzhen Meitu.Innovation Technology LTD 518060 ShenzhenChina. China-Japan Union Hospital of Jilin University 130033 ChangchunChina The Sixth People's Hospital of Shenzhen 518052 ShenzhenChina

Laser scanning microscopy has inherent tradeoffs between imaging speed,field of view(FOV),and spatial resolution due to the limitations of sophisticated mechanical and optical setups,and deep learning networks have emerged to overcome these limitations without changing the ***,we demonstrate deep learning autofluorescence-harmonic microscopy(DLAM)based on self-alignment attention-guided residual-in-residual dense generative adversarial networks to close the gap between speed,FOV;and *** the framework,we demonstrate label-free large-field multimodal imaging of clinicopathological tissues with enhanced spatial resolution and running time *** quality assessments show that the attention-guided residual dense conneaions minimize the persistent noise,distortions,and scanning fringes that degrade the autofluorescence-harmonic images and avoid reconstruction artifaas in the output *** the advantages of high contrast,high fidelity,and high speed in image reconstruction,DLAM can act as a powerful tool for the noninvasive evaluation of diseases,neural activity,and embryogenesis.

关键词： networks Deep harmonic

Simulation and analysis of the time evolution of laser power and temperature in static pulsed XPALs

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High Power Laser Science and Engineering 2019年第3期7卷 67-75页

作者： Chenyi Su binglin Shen Xingqi Xu Chunsheng Xia Bailiang pan Department of Physics Zhejiang University

A theoretical model is established to describe the thermal dynamics and laser kinetics in a static pulsed exciplex pumped Cs–Ar laser(XPAL).The temporal behaviors of both the laser output power and temperature rise in XPALs with a longtime pulse and multi-pulse operation modes are calculated and *** the case of long-time pulse pumping,the results show that the initial laser power increases with a rise in the initial operating temperature,but the laser power decreases quickly due to heat *** the case of multi-pulse operation,simulation results show that the optimal laser output power can be obtained by appropriately increasing the initial temperature and reducing the thermal relaxation time.

关键词： excimer lasers simulation theoretical model

500kV线路绝缘斗臂车带电作业安全距离试验

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高电压技术 2016年第7期42卷 2315-2321页

作者：刘庭唐盼周炳凌刘凯武汉大学电气工程学院武汉430072 中国电力科学研究院武汉分院电网环境保护国家重点实验室武汉430074 江苏省电力公司检修分公司南京210024

为了给500 k V带电作业用绝缘斗臂车的安全使用提供技术依据,通过试验研究确定了绝缘斗臂车带电作业的安全距离。首先结合实际线路和车辆,针对使用绝缘斗臂车在500 k V单回线路直线塔进行带电作业时的各典型工作位置的安全距离进行了1:... 详细信息

为了给500 k V带电作业用绝缘斗臂车的安全使用提供技术依据,通过试验研究确定了绝缘斗臂车带电作业的安全距离。首先结合实际线路和车辆,针对使用绝缘斗臂车在500 k V单回线路直线塔进行带电作业时的各典型工作位置的安全距离进行了1:1模拟工况的操作冲击放电试验研究。结果表明,作为大型导电悬浮体的工作斗降低了组合间隙的击穿电压约15%。依据试验结果,通过危险率计算分析确定了海拔1 000 m地区500 k V绝缘斗臂车带电作业的中相最小安全距离和组合间隙分别为3.8 m和4.7 m,边相最小安全距离和组合间隙分别为3.2 m和3.8 m。考虑到工作斗的长度和导线距塔身的间隙,当工作斗的位于导线和塔身的间隙之中时,安全距离和组合间隙难以满足要求。因此当使用绝缘斗臂车在500 k V直线杆塔上开展带电作业时,工作斗不应进入边相导线和杆塔之间以及中相塔窗。

关键词： 500 kV 绝缘斗臂车带电作业安全距离组合间隙导电悬浮体

Facile Preparation and Application of Polystyrylsulfonyl Chloride Resins

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Chemical Research in Chinese Universities 1991年第2期7卷 117-118页

作者： Huang Wenqiang, Li Chenxi, Bao Rong, Lu Yu, pan Tongtong,Men Aiju, Yin Yaorong and He binglin (Institute of Polymer Chemistry, Nankai University, Tianjin)

Polystyrylsulfonyl chloride resin (1) is a useful polymer intermediate in organic syntheses. Resin 1 can be obtained by chlorosulfonation of styrenedivinylbenzene copolymers, or treatment of the sulfonated copolymer derivatives (i. e., sulfonic cation exchange resins) with thionyl chloride, phosphorus oxychloride and phosphorus pentachloride. The preparation of polystyrylsulfonyl chloride have been reviewed by Emerson et al.

关键词： Polystyrylsulfonyl chloride resin Polymer-supported flouride reagent,Deprotection

联合国原子辐射效应科学委员会及其第49次会议

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辐射防护 2000年第5期20卷 312-317页

作者：潘自强修炳林中国核工业集团公司科学技术委员会北京10082 国家原子能机构北京100053

本文介绍了联合国原子辐射效应科学委员会的简单历史以及其第 49次会议的主要情况。会议通过了向联合国大会的报告及其技术附件 ,并将正式出版联合国原子辐射效应科学委员会 2 0 0 0年报告。文章最后谈到了值得注意的问题和对今后工作... 详细信息

本文介绍了联合国原子辐射效应科学委员会的简单历史以及其第 49次会议的主要情况。会议通过了向联合国大会的报告及其技术附件 ,并将正式出版联合国原子辐射效应科学委员会 2 0 0 0年报告。文章最后谈到了值得注意的问题和对今后工作的意见。

关键词：联合国原子辐射效应科学委员会第49次会议

A low-energy ion spectrometer with half-space entrance for three-axis stabilized spacecraft

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Science China(Technological Sciences) 2019年第6期62卷 1015-1027页

作者： HU RenXiang SHAN Xu YUAN GuangYuan WANG ShuWen ZHANG WeiHang QI Wei CAO Zhe LI YiRen CHEN ManMing YANG XiaoPing WANG Bo SHAO SiPei LI Feng ZHONG XiaoQing FAN Dan HAO XinJun FENG ChangQing SU ZhenPeng SHEN ChengLong LI Xin DAI GuYue QIU binglin pan ZongHao LIU Kai XU ChunKai LIU ShuBin AN Qi ZHANG TieLong WANG YuMing CHEN XiangJun Hefei National Laboratory for Physical Sciences at the Microscale Department of Modern Physics University of Science and Technology of China Hefei 230026 China State Key Laboratory of Particle Detection and Electronics (IHEP-USTC) Department of Modern Physics University of Science and Technology of China Hefei 230026 China CAS Key Laboratory of Geospace Environment School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China Shandong Institute of Space Electronic Technology Yantai 264003 China Institute of Telecommunication Satellite China Academy of Space Technology Beijing 100094 China

A low-energy ion spectrometer(LEIS) for use aboard three-axis stabilized spacecraft has been developed to measure ion energy per charge distribution in three-dimensional space with good energy-, angular-and temporal-resolutions. For the standard top-hat electrostatic analyzer used widely in space plasma detection, three-axis stabilized spacecraft makes it difficult to obtain complete coverage of all possible ion arrival directions. We have designed angular scanning deflectors supplementing to a cylindrically symmetric top-hat electrostatic analyzer to provide a half-space field of view as 360°×90°(–45°–+45°), and fabricated the LEIS flight model for detecting magnetospheric ions in geosynchronous orbit. The performance of this payload has been evaluated in detail by a series of simulation and environmental tests, and the payload has also been calibrated through laboratory experiments using a low-energy ion source. The results show that capabilities of the LEIS payload are in accordance with the requirements of a magnetospheric mission.

关键词： low-energy ion spectrometer three-dimensional measurement top-hat electrostatic analyzer angular scanning deflectors simulation ground calibration

高校教师教学学术水平的实证研究--基于我国内地40所高校教师样本

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江苏高教 2020年第8期 35-42页

作者：李志河钟秉林秦一帆潘霞山西师范大学教育科学学院山西临汾041000 北京师范大学教育学部北京100875

教学是高校教师学术工作的重要组成部分,是一种独特的学术类型。文章采用定量和定性研究相结合的方法,编制了包括观念、知识、交流和反思等四个维度的调查问卷,对中国30个省、直辖市、自治区的40多所高校教师教学学术水平进行调查分析,... 详细信息

教学是高校教师学术工作的重要组成部分,是一种独特的学术类型。文章采用定量和定性研究相结合的方法,编制了包括观念、知识、交流和反思等四个维度的调查问卷,对中国30个省、直辖市、自治区的40多所高校教师教学学术水平进行调查分析,多维度、全方位地展示中国高校教师教学学术水平现状。研究发现:中国高校教师教学学术整体水平良好,观念维度和反思维度对高校教师教学学术水平发展无显著影响;教学维度下的师生交流对于高校教师教学学术水平发展具有显著影响;知识维度下的各类知识在不同人口学变量下,对高校教师教学学术水平发展产生不同影响。因此,提出回归大学本质,实现教学学术系统性;促进交流与协作,构建教学学术共同体;关注性别、年龄的差异性,增强教学学术培训的针对性;注重信息技术素养,补齐高校教师教学学术短板的对策。

关键词：高校教师教学学术学术共同体实证研究