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Rb原子磁光阱中囚禁原子数目与实验参数的依赖关系

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物理学报 2006年第1期55卷 125-129页

作者：江开军李可王谨詹明生中国科学院武汉物理与数学研究所波谱与原子分子国家重点实验室

研究表明,Rb原子磁光阱中所囚禁的原子数目对囚禁光的光强和失谐量,回泵光的强度以及磁场梯度有很大的依赖关系.用二能级系统模型对囚禁原子数目随囚禁光的光强和失谐量的变化关系进行了预估,理论预测的结果与实验结果定性符合.实验结... 详细信息

研究表明,Rb原子磁光阱中所囚禁的原子数目对囚禁光的光强和失谐量,回泵光的强度以及磁场梯度有很大的依赖关系.用二能级系统模型对囚禁原子数目随囚禁光的光强和失谐量的变化关系进行了预估,理论预测的结果与实验结果定性符合.实验结果也展示了囚禁原子数目随回泵光的强度和磁场梯度的变化关系,要定量解释这些实验结果则需要更复杂的理论模型.通过囚禁原子数目对实验参数依赖关系的研究,得到特定的实验参数,来获得最大数目的冷原子.

关键词：磁光阱冷原子

Frontiers in circularly polarized luminescence:molecular design,self-assembly,nanomaterials,and applications

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Science China Chemistry 2021年第12期64卷 2060-2104页

作者： Zhong-Liang Gong Xuefeng Zhu Zhonghao Zhou Si-Wei Zhang Dong Yang Biao Zhao Yi-Pin Zhang Jianping Deng Yixiang Cheng You-Xuan Zheng Shuang-Quan Zang Hua Kuang Pengfei Duan mingjian Yuan Chuan-Feng Chen Yong sheng Zhao Yu-Wu Zhong Ben Zhong tang minghua Liu Beijing National Laboratory for Molecular Sciences(BNLMS) CAS Research/Education Center for Excellence in Molecular SciencesKey Laboratory of PhotochemistryKey Laboratory of ColloidInterface and Chemical ThermodynamicsKey Laboratory of Molecular Recognition and FunctionInstitute of ChemistryChinese Academy of SciencesBeijing100190China Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong999077China State Key Laboratory of Chemical Resource Engineering College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China State Key Laboratory of Coordination Chemistry Key Lab of Mesoscopic Chemistry of Ministry of EducationCollaborative Innovation Center of Advanced Microstructuresand Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Henan Key Laboratory of Crystalline Molecular Functional Materials Henan International Joint Laboratory of Tumor Theranostical Cluster MaterialsGreen Catalysis CenterCollege of ChemistryZhengzhou UniversityZhengzhou450001China Key Lab of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringState Key Laboratory of Food Science and TechnologyJiangnan UniversityWuxi214122China CAS Center for Excellence in Nanoscience CAS Key Laboratory of Nanosystem and Hierarchical FabricationNational Center for Nanoscience and Technology(NCNST)Beijing100190China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryRenewable Energy Conversion and Storage Center(RECAST)Nankai UniversityTianjin300071China School of Chemical Sciences University of Chinese Academy of SciencesBeijing100049China Shenzhen Institute of Molecular Aggregate Science and Engineering School of Science and EngineeringThe Chine

The research in circularly polarized luminescence has attracted wide interest in recent *** on one side are directed toward the development of chiral materials with both high luminescence efficiency and dissymmetry factors,and on the other side,are focused on the exploitations of these materials in optoelectronic *** review summarizes the recent frontiers(mostly within five years)in the research in circularly polarized luminescence,including the development of chiral emissive materials based on organic small molecules,compounds with aggregation-induced emissions,supramolecular assemblies,liquid crystals and liquids,polymers,metal-ligand coordination complexes and assemblies,metal clusters,inorganic nanomaterials,and photon upconversion *** addition,recent applications of related materials in organic light-emitting devices,circularly polarized light detectors,and organic lasers and displays are also discussed.

关键词： circularly polarized luminescence photochemistry photophysics aggregation-induced emission self-assembly nanomaterials nanostructures chiral materials chirality organic light-emitting devices photodetectors organic lasers

Silylated and acetylated β-cyclodextrins for gas chromatographic stationary phases

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Journal of Central South University of Technology 2001年第4期8卷 239-243页

作者： tang Ke wen 1,2 ,YI Jian ming 2,ZHOU Chun shan 1,ZHONG Shi an 1 (1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China 2. College of Chemistry and Chemical Engineering, Yueyang Normal University 1. College of Chemistry and Chemical Engineering Central South University 410083 Changsha China 2. College of Chemistry and Chemical Engineering Yueyang Normal University 414000 Yueyang China

Two new chiral stationary phases, 2,3 di O acetyl 6 O trimethylsilyl β cyclodextrin (DATBCD) and 2,6 di O trimethylsilyl 3 O acetyl β cyclodextrin(DTABCD), were synthesized, their structures were identified by means of infrared and NMR spectra. Capillary columns were coated with the two stationary phases by dynamic method. The chromatographic properties, and enantiomers separation, such as ketone, esters, alcohols and olefines, were investigated on the silylated and acetylated β cyclodextrin stationary phases. The experimental results show that the silylated and acetylated β cyclodextrins are suitable to be used as capillary gas chromatographic stationary phases, the relative polarity of DATBCD and DTABCD stationary phases is respectively 4143 and 3928, the column efficiencies are respectively 3084 and 4198, and DATBCD is of stronger enantioselectivity than DTABCD, capacity factor of the first eluted enantiomer ( k 1) and separation factor(α)of α phenylethanol on DATBCD stationary phase are respectively 8.23 and 1.019.

关键词： capillary gas chromatography silylated and acetylated β-cyclodextrins enantiomeric separation

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多党合作法制化建设的理论与实践

中央社会主义学院学报 2009年第6期 18-21页

作者：唐华生四川文理学院

进一步加强我国多党合作法制化建设,既是依法治国的重要体现,也是发展民主政治的迫切需要,同时还是提高民主党派参政议政能力的重要保证。加强多党合作的法制化建设,一是要筑牢多党合作法制化建设的思想基础;二是要构建多党合作法制化... 详细信息

进一步加强我国多党合作法制化建设,既是依法治国的重要体现,也是发展民主政治的迫切需要,同时还是提高民主党派参政议政能力的重要保证。加强多党合作的法制化建设,一是要筑牢多党合作法制化建设的思想基础;二是要构建多党合作法制化建设的制度基础;三是要夯实多党合作法制化建设的理论基础。

关键词：多党合作法制化建设民主党派

Incorporating Sulfur Atoms into Palladium Catalysts by Reactive Metal–Support Interaction for Selective Hydrogenation

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CCS Chemistry 2022年第9期4卷 3051-3063页

作者： Zhen-Yu Wu Hang Nan Shan-Cheng Shen ming-Xi Chen Hai-Wei Liang Chuan-Qi Huang Tao Yao sheng-Qi Chu Wei-Xue Li Shu-Hong Yu Division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleCAS Center for Excellence in NanoscienceInstitute of EnergyHefei Comprehensive National Science CenterDepartment of ChemistryInstitute of Biomimetic Materials and ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsUniversity of Science and Technology of ChinaHefei 230026 Hangzhou Institute of Advanced Studies Zhejiang Normal UniversityHangzhouZhejiang 311231 National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026 Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049 Department of Chemical Physics School of Chemistry and Materials ScienceiCHeMCAS Center for Excellence in NanoscienceHefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026

Developing highly active and selective catalysts for the hydrogenation of nitroarenes,an environmentally benign process to produce industrially important aniline intermediates,is highly desirable but very *** catalysts are generally recognized as active but nonselective catalysts for this important ***,we report an effective strategy to greatly improve the selectivity of Pd catalysts based on the reactive metal–support interaction.

关键词： incorporating sulfur atoms palladium catalysts reactive metal–support interaction hydrogenation density functional theory calculations

基于少模光纤的模分复用系统多输入多输出均衡与解调

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物理学报 2013年第14期62卷 253-260页

作者：姚殊畅付松年张敏明唐明沈平刘德明华中科技大学下一代互联网接入系统国家工程实验室武汉430074

针对光纤模分复用传输系统中模式耦合串扰问题,设计并制备了一种新型少模光纤,其较高的模式差分群延时保证各模式信道独立传输.在此基础上,提出一种级联多输入多输出(MIMO)延时均衡算法,进一步减少源于模式复用器和解复用器的模式串扰,... 详细信息

针对光纤模分复用传输系统中模式耦合串扰问题,设计并制备了一种新型少模光纤,其较高的模式差分群延时保证各模式信道独立传输.在此基础上,提出一种级联多输入多输出(MIMO)延时均衡算法,进一步减少源于模式复用器和解复用器的模式串扰,提高基于少模光纤的模分复用传输系统的传输距离和传输容量.与传统MIMO均衡算法相比,级联MIMO延时均衡算法在没有显著增加计算复杂度的条件下,能够应用于模式差分群延时很大的模分复用传输系统.对单信道传输速率为40 Gbps的四相相移键控两模复用传输系统进行仿真,经40km少模光纤传输后,采用级联MIMO均衡算法较普通MIMO均衡算法有1.7dB的质量因子的提升.仿真结果证明,使用少模光纤和级联MIMO延时均衡算法能够有效地消除模分复用信号间的串扰,有望在下一代大容量光纤传输系统中获得推广应用.

关键词：模分复用少模光纤模式差分群延时多输入多输出均衡

基于MMC的多端柔性直流输电系统改进下垂控制策略

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中国电机工程学报 2014年第3期34卷 397-404页

作者：阎发友汤广福贺之渊孔明中国电力科学研究院北京市海淀区100192 国网智能电网研究院北京市昌平区102200

多端柔性直流输电(voltage sourced converter based multi-terminal high voltage direct current,VSC-MTDC)系统安全运行至少应满足N?1法则,即当一个换流站由于故障或检修退出运行时,剩余系统可以恢复功率平衡而继续稳定运行,且暂态... 详细信息

多端柔性直流输电(voltage sourced converter based multi-terminal high voltage direct current,VSC-MTDC)系统安全运行至少应满足N?1法则,即当一个换流站由于故障或检修退出运行时,剩余系统可以恢复功率平衡而继续稳定运行,且暂态过电压不会超过设备绝缘裕度。为了维持VSC-MTDC直流电压稳定及整个网络功率平衡的站间协调控制,提出一种改进直流电压下垂控制策略,同时引入一个公共直流参考电压,参与下垂控制换流站的功率调整。在PSCAD/EMTDC中建立基于模块化多电平换流器的三端VSC-MTDC仿真模型,在稳态和暂态运行工况下对所提直流电压控制策略进行仿真验证。结果表明,所提策略可抑制换流站交流侧故障引起的直流侧功率振荡,进行换流站退出运行后系统功率的紧急输送,提高了VSC-MTDC系统的运行稳定性。

关键词：关键词多端柔性直流输电模块化多电平换流器改进下垂控制 N-1法则公共参考电压

Full-color flexible laser displays based on random laser arrays

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Science China Materials 2021年第11期64卷 2805-2812页

作者： Yue Hou Zhonghao Zhou Chunhuan Zhang Ji tang Yuqing Fan Fa-Feng Xu Yong sheng Zhao Key Laboratory of Photochemistry Institute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Flexible laser display is a critical component for an information output port in next-generation wearable *** far,the lack of appropriate display panels capable of providing sustained operation under rigorous mechanical conditions impedes the development of flexible laser displays with high *** to the multiple scattering feedback mechanism,random lasers render high mechanical flexibility to withstand deformation,thus making them promising candidates for flexible display ***,the inability to obtain pixelated random laser arrays with highly ordered emissive geometries hinders the application of flexible laser displays in the wearable ***,for the first time,we demonstrate a mass fabrication strategy of full-color random laser arrays for flexible display *** feedback closed loops can be easily fulfilled in the pixels by multiple scatterings to generate durative random *** to the sustained operation of random laser,the display performance was well-maintained under mechanical deformations,and as a result,a flexible laser display panel was *** finding will provide a guidance for the development of flexible laser displays and laser illumination devices.

关键词： perovskite nanocrystals random laser microlaser arrays flexible displays laser displays

Two-dimensional models of threshold voltage and subthreshold current for symmetrical double-material double-gate strained Si MOSFETs

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Chinese Physics B 2016年第3期25卷 440-444页

作者：辛艳辉袁胜刘明堂刘红侠袁合才 Department of Information and Engineering North China University of Water Resources and Electric Power Key Laboratory for Wide Band Gap Semiconductor Materials and Devices of Education School of Microelectronics Xidian University Department of Mathematics and Information Science North China University of Water Resources and Electric Power

The two-dimensional models for symmetrical double-material double-gate （DM-DG） strained Si （s-Si） metal-oxide semiconductor field effect transistors （MOSFETs） are presented. The surface potential and the surface electric field ex- pressions have been obtained by solving Poisson＇s equation. The models of threshold voltage and subthreshold current are obtained based on the surface potential expression. The surface potential and the surface electric field are compared with those of single-material double-gate （SM-DG） MOSFETs. The effects of different device parameters on the threshold voltage and the subthreshold current are demonstrated. The analytical models give deep insight into the device parameters design. The analytical results obtained from the proposed models show good matching with the simulation results using DESSIS.

关键词： double-material double-gate MOSFET strained Si threshold voltage subthreshold current