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Synthesis and Crystal Structure of a Two-dimensional Cadmium(Ⅱ) Coordination Polymer:[Cd(AIP)(Bpy)]_n·nBpy(H_2AIP=5-Aminoisophthalic Acid, Bpy=2,2′-Bipyridyl)

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Chinese Journal of Structural Chemistry 2008年第2期27卷 159-162页

作者： OU Yang-jun MA cheng-Bing chen Hui WANG Hui-Sheng chen Chang-Neng LIU Qiu-Tian State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

A two-dimensional coordination polymer, [Cd（AIP）（Bpy）]***, was hydrothermally synthesized by the reaction of hydrate cadmium acetate with 5-aminoisophthalic acid, lithium hydroxide, vanadiumpentoxide, sodium chloride and 2,2′-bipyridyl in water solution. It crystallizes in orthorhombic, space group C222 1, absolute structure parameter 0.00（7）, with a = 15.336（4）, b = 22.390（6）, c = 14.257（3）A, V = 4896（2）/~3, C28H21CdNsO4, Mr = 603.90, Z = 8, F（000） = 2432, Dc = 1.639 g/cm^3, μ = 0.939 mm^-1, T= 298（2） K, S = 1.001, R = 0.0296 and wR = 0.0813 for 5522 observed reflections （I 〉 2a（/））. In the title complex, each 5-aminoisophthalate ligand bridges three cadmium（Ⅱ） ions to form a two-dimensional layer structure.

关键词： synthesis crystal structure cadmium complex 5-aminoisophthalic acid

Optical observations of the broad-lined type Ic supernova SN 2012ap

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Research in Astronomy and Astrophysics 2015年第2期15卷 225-236页

作者： Zheng Liu Xu-Lin Zhao Fang Huang Xiao-Feng Wang Tian-Meng Zhang jun-cheng chen Tong-Jie Zhang Astronomy Department Beijing Normal University Physics Department and Tsinghua Center for Astrophysics Tsinghua University National Astronomical Observatories Chinese Academy of Sciences Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Center for High Energy Physics Peking University

Abstract The optical observations of the type Ic supernova （SN lc） SN 2012ap in NGC 1729 are presented. A comparison with other SNe Ic indicates that SN 2012ap is highly reddened （with E（B - V）host-0.8 mag） and may represent one of the most luminous SNe Ic ever observed, with an absolute V-band peak magnitude of - 19.3±0.5 mag after extinction correction. The near-maximum-light spectrum shows wide spectral features that are typical of broad-lined SNe Ic. One interesting feature in the spectrum is the appearance of some narrow absorption features that can be at- tributed to the diffuse interstellar bands, consistent with the large reddening inferred from the photometric method. Based on the light curves and the spectral data, we esti- mate that SN 2012ap produced a 56Ni mass of - 0.3 -b 0.1M in the explosion, with an ejecta mass of 2.4^＋0.7 -0.7M and a kinetic energy of EK=1.1^＋0.4 -0.4×10^52 erg. The properties of its progenitor are also briefly discussed.

关键词： supernovae: general supernovae: individual: SN 2012ap

Spinel LiNi0.5Mn1.5O4 cathode ion batteries： Nano vs micro, disordered phase （F4332） for rechargeable lithium- ordered phase （P433m）

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Nano Research 2013年第9期6卷 679-687页

作者： Jingang Yang Xiaopeng Han Xiaolong Zhang Fangyi cheng jun chen Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education~ College of Chemistry Nankai University Tianjin300071 China

Since the high-voltage spinel LiNi0.5Mn1504 （LNMO） is one of the most attractive cathode materials for lithium-ion batteries, how to improve the cycling and rate performance simultaneously has become a critical question. Nanosizing is a typical strategy to achieve high rate capability due to drastically shortened Li- ion diffusion distances. However, the high surface area of nanosized particles increases the side reaction with the electrolyte, which leads to poor cycling performance. Spinels with disordered structures could also lead to improved rate capability, but the cyclability is low due to the presence of Mn3＋ ions. Herein, we systematically investigated the synergic interaction between particle size and cation ordering. Our results indicated that a microsized disordered phase and a nanosized ordered phase of LNMO materials exhibited the best combination of high rate capability and cycling performance.

关键词： spinel LiNi0.5MnO4 nanomaterials microstructures crystal phases lithium-ion batteries

The THU-NAOC transient survey: the performance and results from the first year

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Research in Astronomy and Astrophysics 2015年第2期15卷 215-224页

作者： Tian-Meng Zhang Xiao-Feng Wang jun-cheng chen Ju-Jia Zhang Li Zhou Wen-Xiong Li Qing Liu jun Mo Kai-cheng Zhang Xin-Yu Yao Xu-Lin Zhao Xu Zhou jun-Dan Nie Fang Huang Zhao-Ji Jiang jun Ma Ling-Zhi Wang Chao Wu Zhi-Min Zhou Hu Zou Li-Fan Wang Key Laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences Physics Department and Tsinghua Center for Astrophysics Tsinghua University Yunnan Observatories Chinese Academy of Sciences Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences University of Chinese Academy of Sciences Purple Mountain Observatory Chinese Academy of Sciences Astronomy Department Beijing Normal University National Astronomical Observatories Chinese Academy of Sciences

The Tsinghua University-National Astronomical Observatories, Chinese Academy of Sciences （NAOC） Transient Survey is an automatic survey that conducts a systematic exploration of optical transients. This project utilizes a 60/90 cm Schmidt telescope at the Xinglong Station of NAOC. This survey repeatedly covers - 1000 square degrees of the northern sky with a cadence of 34 d. With an exposure of 60 s, the survey reaches a limiting unfiltered magnitude of about 19.5 mag, which enables us to discover supernovae in their relatively young stages. We describe the overall performance of our survey during the first year and present some preliminary results.

关键词： supernovae quasars and active galactic nuclei stars

Observation of topological charge transformations in acoustic vortex using passive periodic systems

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 140-147页

作者： Di-Chao chen Xie Liu Changqing Xu Da-Jian Wu Ying cheng Xiao-jun Liu School of Physics and Technology Nanjing Normal University Key Laboratory of Modern Acoustics School of Physics Nanjing University

Vortex transmutation utilizes a periodic system, which not only enables the alteration of the topological charge(TC) of unstable input vortices but also facilitates their transformation into stable structures. This approach is crucial for investigating the characteristics of vortices in various wave systems. Here, we achieve acoustic vortex TC transmutation by employing a welldesigned dual-structured plate external system(DPES). The interactions between the acoustic vortex and the finite-order discrete rotational symmetry lead to the transformation of its topological charge when complete rotational symmetry is broken to Nthorder discrete symmetry. Our results experimentally demonstrate the acoustic vortex TC transmutation based on passive artificial structures, enabling numerous applications in particle manipulation and information multiplexing as well as advancing our understanding and control over free-space acoustic vortices.

关键词： acoustic vortex topological charge transformation artificial structure

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氮化镓器件在大功率电力电子系统中的应用

电力电子技术 2017年第9期51卷 1-2页

作者：卢俊诚陈迪 GaN Systems Inc.

氮化镓(GaN)器件由于其卓越的开关特性,被逐渐应用于10 kW及以上系统。器件并联技术能够进一步降低GaN器件的导通损耗,增加系统的功率容量,开始成为工业界关注的重点。由于其极快的开关速度,GaN器件并联的主要挑战在于对其功率回路及驱... 详细信息

氮化镓(GaN)器件由于其卓越的开关特性,被逐渐应用于10 kW及以上系统。器件并联技术能够进一步降低GaN器件的导通损耗,增加系统的功率容量,开始成为工业界关注的重点。由于其极快的开关速度,GaN器件并联的主要挑战在于对其功率回路及驱动回路寄生参数的优化设计。探讨了并联器件特性及寄生参数对开关特性的影响,并详细给出了基于四管并联240 A/650V的半桥模块参考设计,双脉冲实验验证了半桥模块在额定电流下的开关特性。

关键词：氮化镓器件电力电子系统大功率

Targeting cholesterol trafficking to mitigate axonal degeneration in hereditary spastic paraplegia

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Neural Regeneration Research 2025年第5期20卷 1397-1398页

作者： Zhenyu chen Xue-jun Li Department of Biomedical Sciences University of Illinois College of Medicine RockfordRockfordILUSA Department of Bioengineering University of Illinois at ChicagoChicagoILUSA

Axonal degeneration underlies many debilitating diseases including hereditary spastic paraplegia(HSP),a genetically and clinically diverse group of disorders characterized by spasticity and weakness of the lower *** is one significant cause of chronic neurodisability due to the lack of effective treatments and a wide range of onset ages from early childhood to 70 years.

关键词： degeneration diseases hereditary

STUDIES ON THE SYNTHESIS OF D-GLUCURONIC ACID DERIVATIVES OF 2-BUTOXY-5-FLUORO-3H-4-PYRIMIDONE AND THEIR ANTICANCER ACTIVITIES

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Chinese Chemical Letters 1993年第3期4卷 197-198页

作者： Chang jun SUN Zai cheng chen Yi Gui WANG Peng XUE Department of Chemistry,Shandong University,Jinan,250100Feng Yao LIU Department of Chemistry,Zaozhuang Teachers College,Zaozhuang,Shandong,277000

2-Butoxy-5-fluoro-3H-4-pyrimidone derivatives of D-glucuronic acid having 0-glycosidic linkage or N-glycosidic linkage were synthesized and their anticancer activity *** structures were confirmed by elementary analysi... 详细信息

关键词： STUDIES ON THE SYNTHESIS OF D-GLUCURONIC ACID DERIVATIVES OF 2-BUTOXY-5-FLUORO-3H-4-PYRIMIDONE AND THEIR ANTICANCER ACTIVITIES ACID

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我国与发达国家慈善事业的差异与成因分析

生产力研究 2011年第12期 162-164,301页

作者：白少君刘锦程陈晨西安外国语大学商学院陕西西安710128

近年来我国慈善事业日益受到人们的重视,而我国与发达国家慈善事业的发展相比仍有很大的差异。文章探讨这种差异的成因:政治成因﹑经济成因和文化成因,并结合我国慈善事业的实际情况提出了一些可行性建议。

关键词：慈善差异成因