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The Jiao Tong university Spectroscopic Telescope Project

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Astronomical Techniques and Instruments 2024年第1期1卷 16-30页

作者： JUST Team Chengze Liu Ying Zu Fabo Feng Zhaoyu Li Yu Yu Hua Bai Xiangqun Cui Bozhong Gu Yizhou Gu Jiaxin Han Yonghui Hou Zhongwen Hu Hangxin Ji Yipeng Jing Wei Li Zhaoxiang Qi Xianyu Tan Cairang Tian Dehua yang Xiangyan Yuan Chao Zhai Congcong Zhang Jun Zhang Haotong Zhang Pengjie Zhang Yong Zhang Yi Zhao Xianzhong Zheng Qingfeng Zhu Xiaohu yang Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China department of Astronomy School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Nanjing Institute of Astronomical Optics&Technology Chinese Academy of SciencesNanjing 210042China university of Chinese Academy of Sciences NanjingNanjing 211135China university of Chinese Academy of Sciences Beijing 101408China Lenghu Technology Innovation Industrial Park Management Committee Lenghu 817400China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China department of Astronomy University of Science and Technology of ChinaHefei 230026China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China

The Jiao Tong university Spectroscopic Telescope(JUST)is a 4.4-meter f/6.0 segmented-mirror telescope dedicated to spectroscopic *** JUST primary mirror is composed of 1. hexagonal segments,each with a diameter of 1.1.*** provides two Nasmyth platforms for placing science *** Nasmyth focus fits a field of view of 1.′and the other has an extended field of view of {1.°with correction optics.A tertiary mirror is used to switch between the two Nasmyth *** will be installed at a site at Lenghu in Qinghai Province,china,and will conduct spectroscopic observations with three types of instruments to explore the dark universe,trace the dynamic universe,and search for exoplanets:(1.a multi-fiber(2000 fibers)medium-resolution spectrometer(R=4000-5000)to spectroscopically map galaxies and large-scale structure;(2)an integral field unit(IFU)array of 500 optical fibers and/or a long-slit spectrograph dedicated to fast follow-ups of transient sources for multi-messenger astronomy;(3)a high-resolution spectrometer(R~1.0000)designed to identify Jupiter analogs and Earth-like planets,with the capability to characterize the atmospheres of hot exoplanets.

关键词： Astronomical instrumentation Optical telescopes Large-scale structure of the universe Redshift surveys Time domain astronomy Exoplanet astronomy

北斗+GPS高性能低噪声放大器的研究与设计

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电子器件 2017年第6期40卷 1432-1436页

作者：马杰王丽黎华南理工大学物理与光电学院广州510641 西安理工大学自动化与信息工程学院西安710048

针对国内北斗行业的发展和双模定位的优点以及北斗B1.段和GPS相近的特点,给出了一种适用于北斗B1.段和GPS L1.段的低噪声放大器的设计原理和设计方法,并制作出实物,给出了测试结果。为了达到更好的增益,采用了3级级联的方式。设计出... 详细信息

针对国内北斗行业的发展和双模定位的优点以及北斗B1.段和GPS相近的特点,给出了一种适用于北斗B1.段和GPS L1.段的低噪声放大器的设计原理和设计方法,并制作出实物,给出了测试结果。为了达到更好的增益,采用了3级级联的方式。设计出的低噪声放大器的在B1.L1.段内的增益(38±0.5)d B,输入驻波系数小于1.8,输出驻波系数小于1.2,噪声系数小于0.65 d B,在全频段内无条件稳定,可用于北斗B1.段和GPS L1.段。

关键词：低噪声放大器北斗 GPS 噪声系数级联

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对力对希土原子核性质的影响

物理学报 1965年第2期 267-316页

作者：曾谨言陈健华魏海官北京大学物理系

本文利用粒子数守恒方法分析对力对希土区变形偶偶核的各种性质的影响,其中包括低内部激发态(E2MeV)的激发机构、有关的β衰变和奇偶质量差等。为进行这些分析,本文先确定希土变形核内的单粒子能级。分析表明:适当改变参数μ和к以后的N... 详细信息

本文利用粒子数守恒方法分析对力对希土区变形偶偶核的各种性质的影响,其中包括低内部激发态(E2MeV)的激发机构、有关的β衰变和奇偶质量差等。为进行这些分析,本文先确定希土变形核内的单粒子能级。分析表明:适当改变参数μ和к以后的Nilsson能极,在考虑对力影响后,能较好地解释奇A核的低内部激发谱的自旋和宇称,并能近似地解释其能级间隔。参数μ,к,和η是由奇A核的实验能谱来确定的。在希土转动区中,к～0.067—0.072,η～4—4.6.

关键词：原子核能对力子核单粒子偶偶核希土奇奇核内部激发态

Design and construction of ultra-thin MoSe2 nanosheet-based heterojunction for high-speed and low-noise photodetection

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Nano Research 2016年第9期9卷 2641-2651页

作者： Xiangshun Geng Yongqiang Yu Xiaoli Zhou Chunde Wang Kewei Xu Yan Zhang Chunyan Wu Li Wang yang Jiang Qing yang School of Electrical Science and Applied physics Hefei University of TechnologyHefei 230009China Hefei National Laboratory for Physical Sciences at Microscale Department of ChemistryLaboratory of Nanomaterials for Energy Conversion and Synergetic Innovation Center of Quantum Information & Quantum PhysicsUniversity of Science and Technology of China(USTC)Hefei 230026China School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China

Advances in the photocurrent conversion of two-dimensional (2D) transition metal dichalcogenides have enabled the realization and application of ultrasensitive and broad-spectral photodetectors. The requirements of previous devices constantly drive for complex technological implementation, resulting in limits in scale and complexity. Furthermore, the development of large-area and low-cost photodetectors would be beneficial for applications. Therefore, we demonstrate a novel design of a heterojunction photodetector based on solution-processed ultrathin MoSe2 nanosheets to satisfy the requirements of its application. The photodetector exhibits a high sensitivity to visible–near infrared light, with a linear dynamic range over 1.4 decibels (dB), a detectivity of ~1.2 × 1.1.Jones, and noise current approaching 0.1.pA·Hz–1.2at zero bias. Significantly, the device shows an ultra-high response speed up to 30 ns with a 3-dB predicted bandwidth over 32 MHz, which is far better than that of most of the 2D nanostructured and solution-processable photodetectors reported thus far and is comparable to that of commercial Si photodetectors. Combining our results with material-preparation methods, together with the methodology of device fabrication presented herein, can provide a pathway for the large-area integration of low-cost, high-speed photodetectors. [Figure not available: see fulltext.] © 201., Tsinghua university Press and Springer-Verlag Berlin Heidelberg.

关键词： molybdenum diselenide layer transition metal dichalcogenide (TMD) urtrathin nanosheet heterojunction ultrafast photoresponse

电场下GaAs/G_(a1.x)Al_xA_s量子阱中的激子

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零陵学院学报 1989年第3期12卷 18-26页

作者：唐道华

本文利用有限势垒（左、右垒高不等）模型,研究了电场对GaAs/Ga1.xA1.As量阱中各子带所对应的激子之影响.采用级数展法开求得于带所对应的电子——空穴重叠函数.通过变分计算得到激子结合能.对阱宽为1.5（?）的GaAs/Ga0.66A1..34As量子... 详细信息

本文利用有限势垒（左、右垒高不等）模型,研究了电场对GaAs/Ga1.xA1.As量阱中各子带所对应的激子之影响.采用级数展法开求得于带所对应的电子——空穴重叠函数.通过变分计算得到激子结合能.对阱宽为1.5（?）的GaAs/Ga0.66A1.sub>0.34As量子阱,电场由0至1.2×1.5V/cm,我们计算了（电子和空穴的）子带对应的激子之结合能.基于上述计算结果,所得激子峰的能移与实验测量符合得较好,体现出有限势阱模型比无限势阱模型好得多.

关键词：激子结合能电场变化空穴子带激子峰重空穴量子阱 GaAs 重叠函数有效质量能子

T-odd top partner pair production in the dilepton final states at the LHC in the littlest Higgs Model with T-parity

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Chinese physics C 2018年第10期42卷 19-24页

作者： Bingfang yang Huaying Zhang Biaofeng Hou Ning Liu College of physics and Materials Science Henan Normal UniversityXinxiang 453007China department of {1. and Institute of Theoretical {1. Nanjing Normal UniversityNanjing 210023China

In the littlest Higgs model with T-parity, we discuss the pair production of the T-odd top partner （T_） that decays almost 1.0% into the top quark and the lightest T-odd particle （AH）. Considering the current constraints, we investigate the observability of the T-odd top partner pair production through the process pp→T_T_ →ttAHAH in the final states with two leptons at 1. TeV LHC. We analyze the signal significance and found that the lower limits on the T-odd top partner mass are approximately 1.2 TeV, 1.3 TeV, and 1.4 TeV at the 2or confidence level at 1. TeV LHC with an integrated luminosities of 30 fb^-1. 1.0 fb^-1. and 300 fb^-1. respectively. This lower limit can be increased to approximately 1.5（1.6） TeV if we used 1.00（3000） fb^-1.of the integrated luminosity.

关键词： top partner LHC littlest Higgs Model with T-parity

聚环氧乙烷硫氰化钠络合物(PEO-NaSCN)离子导体电学性能的研究

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物理学报 1984年第6期 854-860页

作者：王超英陈立泉陈竹生何元康中国科学院物理研究所北京大学化学系

本文研究了分子量为6.0×1.~3,1.2×1.~4和 2.0×1.~4的PEO-NaSCN络合物的电学性能。分子量为6.0×1.~3和2.0×1.~4的样品,络合反应不完全,因而在第一次升温过程中,继续进行络合反应,导致电导率随温度变化的复杂行为。分子量为 1.2×1.~... 详细信息

本文研究了分子量为6.0×1.~3,1.2×1.~4和 2.0×1.~4的PEO-NaSCN络合物的电学性能。分子量为6.0×1.~3和2.0×1.~4的样品,络合反应不完全,因而在第一次升温过程中,继续进行络合反应,导致电导率随温度变化的复杂行为。分子量为 1.2×1.~3的样品,络合反应相当充分,因而电学性能不受热历史的影响,过量的PEO对电导率的大小及其随温度的变化行为有显著影响。分子量为1.2×1.~4的样品含有较多的过量的PEO,电导率最高,而且在PEO熔点附近,电导率突然增加。分子量为6.O×1.~3的样品,含的过量PEO最少,电导率最低,而且随温度连续变化。

关键词： PEO-NaSCN 聚环氧乙烷聚氧化乙烯聚醚钠络合物钠化合物电导率电性电学性能离子导体

A Bifunctional-Modulated Conformal Li/Mn-Rich Layered Cathode for Fast-Charging,High Volumetric Density and Durable Li-Ion Full Cells

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Nano-Micro Letters 2021年第8期13卷 40-55页

作者： Zedong Zhao Minqiang Sun Tianqi Wu Jiajia Zhang Peng Wang Long Zhang Chongyang yang Chengxin Peng Hongbin Lu State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceCollaborative Innovation Center of Polymers and Polymer CompositesFudan University2005 Songhu RoadShanghai 200438People’s Republic of China School of Materials Science&Engineering University of Shanghai for Science and TechnologyShanghai 200093People’s Republic of China National Engineering Research Center for Supercapacitor for Vehicles Shanghai Aowei Technology Development Co.LtdShanghai 201203People’s Republic of China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071People’s Republic of China

Lithium-and manganese-rich(LMR)layered cathode materials hold the great promise in designing the next-generation high energy density lithium ion ***,due to the severe surface phase transformation and structure collapse,stabilizing LMR to suppress capacity fade has been a critical ***,a bifunctional strategy that integrates the advantages of surface modification and structural design is proposed to address the above issues.A model compound Li_(1.2)Mn_(0.54)Ni_(0.1.)Co_(0.1.)O_(2)(MNC)with semi-hollow microsphere structure is synthesized,of which the surface is modified by surface-treated layer and graphene/car-bon nanotube dual *** unique structure design enabled high tap density(2.1.g cm^(−3))and bidirectional ion diffusion *** dual surface coatings covalent bonded with MNC via C-O-M linkage greatly improves charge transfer efficiency and mitigates electrode *** to the synergistic effect,the obtained MNC cathode is highly conformal with durable structure integrity,exhibiting high volumetric energy density(2234 Wh L^(−1.)and predominant capacitive *** assembled full cell,with nanograph-ite as the anode,reveals an energy density of 526.5 Wh kg^(−1.,good rate performance(70.3%retention at 20 C)and long cycle life(1.00 cycles).The strategy presented in this work may shed light on designing other high-performance energy devices.

关键词： Lithium-and manganese-rich layered cathode Semi-hollow microspheres Volumetric energy density Conformal structure Full cell

Physical Properties Revealed by Transport Measurements for Superconducting Nd_(0.8)Sr_(0.2)NiO_(2) Thin Films

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Chinese physics Letters 2021年第4期38卷 103-110页

作者： Ying Xiang Qing Li Yueying Li Huan yang Yuefeng Nie Hai-Hu Wen National Laboratory of Solid State Microstructures and department of {1. Center for Superconducting Physics and MaterialsCollaborative Innovation Center for Advanced MicrostructuresNanjing UniversityNanjing 210093China National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

The newly discovered superconductivity in infinite-layer nickelate superconducting films has attracted much attention,largely because their crystalline and electronic structures are similar to those of high-T_(c) cuprate *** upper critical field can provide a great deal of information on the subject of superconductivity,but detailed experimental data are still lacking for these *** present the temperature-and angle-dependence of resistivity,measured under different magnetic fields H in Nd_(0.8)Sr_(0.2)NiO_(2) thin *** onset superconducting transition occurs at about 1..2 K at 0 ***-dependent upper critical fields,determined using a criterion very close to the onset transition,show a clear negative curvature near the critical transition temperature,which can be explained as a consequence of the paramagnetically limited effect on *** temperaturedependent anisotropy of the upper critical field is obtained from resistivity data,which yields a value decreasing from 3 to 1.2 with a reduction in *** can be explained in terms of the variable contribution from the orbital limit effect on the upper critical *** angle-dependence of resistivity at a fixed temperature,and at different magnetic fields,cannot be scaled to a curve,which deviates from the prediction of the anisotropic Ginzburg-Landau ***,at low temperatures,the resistance difference can be scaled via the parameter H^(β)| cos θ|(β=6-1.,with θ being the angle enclosed between the c-axis and the applied magnetic *** the first detailed study of the upper critical field of nickelate thin films,our results clearly indicate a small anisotropy,and a paramagnetically limited effect,in terms of superconductivity,in nickelate superconductors.

关键词： temperature. field. theory.