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Comparison of energy structure and spectral properties of Ce:LaAlO_3 and Ce:Lu_2.SiO_4)O

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Science china(Technological Sciences) 2009年第12期52卷 3678-3682页

作者： WANG XiaoDan 1 ,PAN Tao 1 ,ZANG TaoCheng 1 ,LI JianKang 1 ,ZHAO ZhiWei 2.,zhang LianHan 2.&xu jun3 1Department of Applied Physics,University of Science and Technology of Su{2.,Su{2. 2.5009,china 2.5} institute of optics and fine mechanics,chinese academy of Sciences,shanghai 2.1800,china 3shanghai institute of Ceramics,chinese academy of Sciences,shanghai 2.1800,china 1. Department of Applied Physics University of Science and Technology of Suzhou Suzhou 215009 China 2. {1. institute of {2. and fine mechanics Chinese Academy of Sciences Shanghai 201800 China 3. shanghai {1. of Ceramics Chinese Academy of Sciences Shanghai 201800 China

Undoped LaAlO3 and 1.at.%Ce:LaAlO3 single crystals were grown by the Czochralski *** and fluorescence spectra were measured at room *** energy levels structure of Ce:LaAlO3 was *** this paper,two viewpoints were *** first one is:the energy levels structure of Ce:LaAlO3 is very similar to that of Ce:Lu2.SiO4)O which is a well-known *** the energy levels structure of Ce:LaAlO3 and Ce:Lu2.SiO4)O,the lowest 5d energy level of Ce 3+ is located below the bottom of the conduction band of host crystal and the other higher 5d energy levels of Ce 3+ are located above the bottom of the conduction band of host *** second one is:Ce:LaAlO3 single crystal may not be suitable for scintillation application;by comparing the energy levels structures of Ce:LaAlO3 and Ce:Lu2.SiO4)O,the large energy difference(1.1. eV)between the two lowest 5d energy levels of Ce 3+ in LaAlO3 is a crucial factor that causes the luminescence quenching.

关键词： Ce:LaAlO3 Ce:Lu2.SiO4)O energy-level absorption luminescence

Single crystal β-Ga_2._3: Cr grown by floating zone technique and its optical properties

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Science china(Technological Sciences) 2007年第1期50卷 51-56页

作者： zhang junGang1, 2, LI Bin3, XIA ChangTai1, xu jun1, DENG Qun4, xu XiaoDong1, WU Feng1, xu WuSheng4, SHI HongSheng4, PEI GuangQing1, 2 & WU YongQing1,2 1 shanghai institute of optics and fine mechanics, chinese academy of Sciences, shanghai 2.1800, china 2 Graduate School of the chinese academy of Sciences, Beijing 100039, china 3 shanghai institute of Applied Physics, chinese academy of Sciences, shanghai 2.1800, china 4 GE (china) Research and Development Center Co. Ltd., shanghai 201203, china 1. shanghai {1. of {2. and fine mechanics Chinese Academy of Sciences Shanghai 201800 China 2. Graduate School of the {1. academy of Sciences Beijing 100039 China 3. shanghai {1. of Applied Physics Chinese Academy of Sciences Shanghai 201800 China 4. GE (china) Research and Development Center Co. Ltd. Shanghai 201203 China

β-Ga2.3: Cr single crystals were grown by floating zone technique. Absorption spectra and fluorescence spectra were measured at room temperature. The values of field splitting parameter Dq and Racah parameter B were obtained by the peak values of absorption spectra. The value 1.Dq/B=2..1. manifests that in β-Ga2.3 crystals Cr3+ ions are influenced by low energy crystal field. After high temperature annealing in air, the Cr3+ intrinsic emission was enhanced and the green lumines-cence disappeared. The strong and broad 691.nm emission was obtained at 42. nm excitation due to the electron transition occurred from 4T2.to 4A2. The studies manifest that the β-Ga2.3 crystals have the potential application for tunable laser.

关键词： β-Ga2.3: Cr single crystals floating zone technique tunable laser spectrum.

Primary scientific results of Chang'E-1.lunar mission

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Science china Earth Sciences 2010年第11期53卷 1565-1581页

作者： OUYANG ZiYuan1,2, LI ChunLai1, zou YongLiao1, zhang HongBo1, Lü Chang1, LIU JianZhong1, LIU Jianjun1, ZUO Wei1, SU Yan1, WEN WeiBin1, BIAN Wei1, ZHAO BaoChang3, WANG JianYu4, YANG JianFeng3, CHANG Jin5, WANG HuanYu6, zhang XiaoHui7, WANG ShiJin7, WANG Min1, REN Xin1, MU LingLi1, KONG DeQing1, WANG XiaoQian1, WANG Fang1, GENG Liang1, zhang zhouBin1, ZHENG Lei1, ZHU XinYing1, ZHENG YongChun1, LI junDuo1, zou XiaoDuan1, xu Chun1, SHI ShuoBiao1, GAO YiFei1 & GAO GuanNan1 1 National Astronomical Observatories, chinese academy of Sciences, Beijing 100012, china 2 institute of Geochemistry, chinese academy of Sciences, Guiyang 550002, china 3 Xi’an institute of optics and Precision mechanics, chinese academy of Sciences, Xi’an 710119, china 4 shanghai institute of Technical Physics, chinese academy of Sciences, shanghai 200083, china 5 Purple Mountain Observatory, chinese academy of Sciences, Nanjing 210008, china 6 institute of High Energy Physics, chinese academy of Sciences, Beijing 100049, china 7 Center for Space Science and Applied Research, chinese academy of Sciences, Beijing 100190, china 1. National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China2. Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China3. Xi’an Institute of Optics and Precision Mechanics Chinese Academy of Sciences Xi’an 710119 China4. Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China5. Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 China6. Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China7. Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100190 China

The strategic plan for the development of the unmanned chinese Lunar Exploration Program is characterized by three distinct stages: "orbiting around", "landing on" and "returning from" the Moon. The first chinese lunar probe, Chang'E-1. which was successfully launched on October 2.th, 2.07 at Xichang Satellite Launch Center, and guided to crash on the Moon on March 1.t, 2.09, at 52.36°E, 1.50°S, in the north of Mare Fecunditatis, is the first step towards the "orbiting around" stage. The Chang'E-1.mission lasted 495 days, exceeding the expected life-span by about four months. A total of 1.37 TB raw data was received from Chang'E-1. It was then processed into 4 TB scientific data products at various levels. Many scientific results have been obtained by analyzing these data, including especially the "global lunar image from the first chinese lunar explora- tion mission". All scientific goals of Chang'E-1.have been achieved. It provides much useful materials for further advances of lunar sciences and planetary chemistry. Meanwhile, these results will serve as a firm basis for future chinese lunar missions.

关键词： lunar orbiter Chang’E-1 scientific data results

1.B-doped MCP detector developed for neutron resonance imaging at Back-n white neutron source

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Nuclear Science and Techniques 2024年第8期35卷 58-68页

作者： Qiang Li Li‑Jiao Wang Jing‑Yu Tang Xiang‑Biao Qiu Zhen Chen Mao‑Yuan Zhao Chang‑jun Ning Kai Pan Wei xu Tao Li Su‑Peng Lu Han Yi Rui‑Rui Fan Chang‑Qing Feng rong {2. Xiao‑Yang Sun Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao Qi‑Ping Chen Yong‑Hao Chen Zeng‑Qi Cui An‑Chuan Fan Fan‑Zhen Feng Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang Hong Yi‑Wei Hu Han‑Xiong Huang Wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin Ling Kang Bo Li Gong Li Xiao Li Yang Li Jie Liu rong Liu Shu‑Bin Liu Yi‑Na Liu Guang‑Yuan Luan Jie Ren Zhi‑zhou Ren Xi‑Chao Ruan Zhao‑Hui Song Kang Sun Zhi‑Xin Tan Sheng‑Da Tang Jin‑Cheng Wang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen Xiao‑Guang Wu xuan Wu Cong Xia Yong‑Ji Yu Guo‑Hui {2. Hang‑Chang {2. Lin‑Hao {2. Qi‑Wei {2. Xian‑Peng {2. Yu‑Liang {2. Yue {2. Zhi‑Yong {2. Zhi‑Hao zhou Ke‑jun Zhu Chong zou institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China North Night Vision Science and Technology(Nanjing)Research institute Co.Ltd Nanjing 211106China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China institute of Modern Physics Fudan UniversityShanghai 200433China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China china {1. of Engineering Physics Institute of Nuclear Physics and ChemistryMianyang 621900China USTC archaeometry lab University of Science and Technology of ChinaHefei 230026China Northwest institute of Nuclear Technology Xi’an 710024China University of chinese {1. of Sciences Beijing 100049China china Shipbuilding Trading Co. LtdBeijing 100044China

Neutron resonance imaging(NRI)has recently emerged as an appealing technique for neutron *** complexity surpasses that of conventional transmission imaging,as it requires a high demand for both a neutron source and ***,the progression of NRI technology has been sluggish since its inception in the 1.80s,particularly considering the limited studies analyzing the neutron energy range above *** white neutron source(Back-n)at the china Spallation Neutron Source(CSNS)provides favorable beam conditions for the development of the NRI technique over a wide neutron energy range from eV to ***-sensitive microchannel plates(MCP)have emerged as a cutting-edge tool in the field of neutron detection owing to their high temporal and spatial resolutions,high detection efficiency,and low *** this study,we report the development of a 1.B-doped MCP detector,along with its associated electronics,data processing system,and NRI experiments at the *** heavy elements such as gold,silver,tungsten,and indium can be easily identified in the transmission images by their characteristic resonance peaks in the 1.1.0 eV energy range;the more difficult medium-weight elements such as iron,copper,and aluminum with resonance peaks in the 1.1.0 keV energy range can also be *** particular,results in the neutron energy range of dozens of keV(Aluminum)are reported here for the first time.

关键词： Neutron resonance imaging 1.B doped MCP detector White neutron source Sample nuclide identification

Structural, Morphological and Optical Properties of ZnO Thin Films Grown on γ-LiA1._2.Substrate by Pulsed Laser Deposition

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Journal of Materials Science & Technology 2005年第4期21卷 549-551页

作者： jun {1. {2. zhou Xia zhang Fenglian SU Xiaomin LI jun xu shanghai {1. of {2. and fine mechanics Chinese Academy of Sciences Shanghai 201800 China Graduate School Chinese Academy of Sciences Beijing 100039 China shanghai {1. of Ceramics Chinese Academy of Sciences Shanghai 200050 China Anhui University Hefei 230039 China

ZnO thin films were deposited on the substrates of （1.0） γ-LiAlO2.at 400,550 and 700℃ using pulsed laser deposition （PLD） with the fixed oxygen pressure of 2. Pa, respectively. When the substrate temperature is 400℃, the grain size of the film is less than 1.m observed by Leitz microscope and measured by X-ray diffraction （XRD）. As the substrate temperature increases to 550℃, highly-preferred c-orientation and high-quality ZnO film can be *** the substrate temperature rises to 700℃, more defects appears on the surface of film and the ZnO films become polycrystalline again possibly because more Li of the substrate diffused into the ZnO film at high substrate temperature. The photoluminescence （PL） spectra of ZnO films at room temperature show the blue emission peaks centered at 430 nm. We suggest that the blue emission corresponds to the electron transition from the level of interstitial Zn to the valence band. Meanwhile, the films grown on γ-LiAl02.（LAO） exhibit green emission centered at 540 nm, which seemed to be ascribed to excess zinc and/or oxygen vacancy in the ZnO films caused by diffusion of Li from the substrates into the films during the deposition.

关键词： γ-LiAlO2 ZnO Photo luminescence (PL) spectra Thin film

Repeatability and reproducibility of corneal higher-order aberrations measurements after small incision lenticule extraction using the Scheimpfug-Placido topographer

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Eye and Vision 2024年第1期10卷 1-9页

作者： Rui Ning rongrong Gao David PPiñero {2. zhang Qingyi Gao Yili Jin Yiran Wang Chenxiao Wang Jinhai Huang Eye Hospital and School of Ophthalmology and Optometry Wenzhou Medical UniversityWenzhouZhejiangChina Eye institute and Department of Ophthalmology Eye and ENT HospitalFudan UniversityShanghaiChina Group of optics and Visual Perception Department of OpticsPharmacology and AnatomyUniversity of AlicanteAlicanteSpain NHC Key Laboratory of Myopia(Fudan University) Key Laboratory of MyopiaChinese Academy of Medical SciencesShanghaiChina shanghai Research Center of Ophthalmology and Optometry ShanghaiChina

Background:To evaluate the precision of corneal higher-order aberrations measurements after small incision lenticule extraction(SMILE)using the Sirius Scheimpfug-Placido topographer(CSO,Italy).Methods:Seventy-fve eyes from 75 postoperative subjects were included in this prospective *** consecutive corneal aberrometric measurements were obtained with the Scheimpfug-Placido topographer by two experienced operators to assess intra-and inter-observer *** within-subject standard deviation(Sw),test-retest repeatability(TRT)and the intraclass correlation coefcient(ICC)were ***:For intraobserver repeatability of anterior and total corneal aberrations,all ICCs were more than 0.92.,except for trefoil(0.72. to 0.768).The ICCs of total root mean square(RMS),coma Z(3,±1.,and spherical aberration Z(4,0)were over 0.81. while higher-order RMS,trefoil Z(3,±3),and astigmatism II Z(4,±2.were below 0.634 for posterior corneal surface *** Sw values for all types of aberrations were equal to or below 0.07μ*** interobserver reproducibility,all TRT values were no more than 0.1.0}m,0.05μm,and 0.1.μm for anterior,posterior,and total corneal aberrations,*** ICC values ranged from 0.875 to 0.989,from 0.686 to 0.976 and over 0.834 for anterior,posterior,and total corneal aberrations,***:The repeatability of measurements of anterior and total corneal aberrations with the Sirius system in corneas after SMILE surgery was high,except for *** was some variability in posterior corneal aberrometric *** reproducibility of corneal aberrometric measurements was observed between measurements of both examiners,except for trefoil,with poor to moderate reproducibility.

关键词： Sirius Higher-order aberrations Repeatability Reproducibility Small incision lenticule extraction

Description and reconstruction of one-dimensional photonic crystal by digital signal processing theory

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chinese Physics B 2014年第10期23卷 200-204页

作者：张娟付文鹏张荣军王阳 Key Laboratory of Specialty Fiber optics and Optical Access Networks School of Communication and Information Engineering Shanghai University Key Laboratory of High Power Laser Materials Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences

A method of describing one-dimensional photonic crystals （1.PCs） based on Z-domain digital signal processing theory is presented. The analytical expression of the target band gap spectrum in the digital domain is obtained by the autocorrelation of its impulse response. The feasibility of this method is verified by reconstructing two simple 1.PC structures with a target photonic band gap obtained by the traditional transfer matrix method. This method provides an effective approach to function-guided designs of interference-based band gap structures for photonic applications.

关键词： one-dimensional photonic crystal digital signal processing Z-transform

Characterization of acute-on-chronic liver diseases: A multicenter prospective cohort study

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World Journal of Hepatology 2024年第5期16卷 809-821页

作者： Yuan-Yao zhang Sen Luo Hai Li Shu-Ning Sun Xian-Bo Wang Xin Zheng Yan Huang Bei-Ling Li Yan-Hang Gao Zhi-Ping Qian Feng Liu Xiao-Bo Lu {1.-Ping Liu Hao-Tang Ren Yu-Bao Zheng Hua-Dong Yan Guo-Hong Deng Liang Qiao Yan zhang Wen-Yi Gu Xiao-Mei Xiang Yi zhou Yi-Xin Hou Qun zhang Yan Xiong Cong-Cong zou {1. Chen Ze-Bing Huang Xiu-Hua Jiang Ting-Ting Qi Yuan-Yuan Chen Na Gao Chun-Yan Liu Wei Yuan xue Mei Jing Li Tao Li rong-Jiong Zheng Xin-Yi zhou {1. Zhao Zhong-Ji Meng Department of Infectious Disease Institute of Biomedical ResearchRegulatory Mechanism and Targeted Therapy for Liver Cancer Shiyan Key LaboratoryHubei provincial Clinical Research Center for Precise Diagnosis and Treatment of Liver CancerTaihe HospitalHubei University of MedicineShiyan 442000Hubei ProvinceChina Department of Gastroenterology Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200120China Department of Infectious Diseases Southwest HospitalThe Third Military Medical University(Army Medical University)Chongqing 400000China Center of Integrative Medicine Beijing Ditan HospitalCapital Medical UniversityBeijing 100020China Department of Infectious Diseases Institute of Infection and ImmunologyUnion HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430020Hubei ProvinceChina Department of Infectious Diseases Hunan Key Laboratory of Viral HepatitisXiangya HospitalCentral South UniversityChangsha 110051Hunan ProvinceChina Hepatology Unit Department of Infectious DiseasesNanfang HospitalSouthern Medical UniversityGuangzhou 510515Guangdong ProvinceChina Department of Hepatology The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Liver Intensive Care Unit Shanghai Public Health Clinical CentreFudan UniversityShanghai 200093China Tianjin institute of Hepatology Nankai University Second People's HospitalTianjin 300192China Infectious Disease Center The First Affiliated Hospital of Xinjiang Medical UniversityUrumqi 830054Xinjiang Uygur Autonomous RegionChina Department of Infectious Diseases and Hepatology The Second Hospital of Shandong UniversityJinan 250000Shandong ProvinceChina State Key Laboratory for Diagnosis and Treatment of Infectious Diseases Collaborative Innovation Center for Diagnosis and Treatment of Infectious DiseaseThe First Affiliated HospitalZhejiang University School of MedicineHangzhou 310000Zhejiang ProvinceChina Department of Infectious Diseases The Thir

BACKGROUND Acute-on-chronic liver disease(AoCLD)accounts for the majority of patients hospitalized in the Department of Hepatology or Infectious *** To explore the characterization of AoCLD to provide theoretical guidance for the accurate diagnosis and prognosis of *** Patients with AoCLD from the chinese Acute-on-Chronic Liver Failure(ACLF)study cohort were included in this *** clinical characteristics and outcomes,and the 90-d survival rate associated with each clinical type of AoCLD were analyzed,using the Kaplan-Meier method and the log-rank *** A total of 3375 patients with AoCLD were enrolled,including 1.79(49.7%)patients with liver cirrhosis acute decompensation(LC-AD),850({1..{1.)patients with ACLF,577(1..1.)patients with chronic hepatitis acute exacer-bation(CHAE),and {1.9(8.0%)patients with liver cirrhosis active phase(LC-A).The most common cause of chronic liver disease(CLD)was HBV infection(71.4%).The most common precipitants of AoCLD was bacterial infection({1..8%).The 90-d mortality rates of each clinical subtype of AoCLD were 43.4%({1.{1.535)for type-C ACLF,36.0%(36/1.0)for type-B ACLF,{1..0%(58/{1.5)for type-A ACLF,9.0%(1.1.1.79)for LC-AD,3.0%(8/{1.9)for LC-A,and 1.{1.(7/577)for *** HBV infection is the main cause of CLD,and bacterial infection is the main precipitant of *** most common clinical type of AoCLD is *** diagnosis and timely intervention are needed to reduce the mortality of patients with LC-AD or ACLF.

关键词： Acute-on-chronic liver disease Acute-on-chronic liver failure Liver cirrhosis Clinical features Prognosis

3D-QSAR study of 2.(S)-camptothecin analogs

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Acta Pharmacologica Sinica 2007年第2期28卷 307-314页

作者： Ai-jun LU~(1,2. Zhen-shan zhang~2.Ming-yue ZHENG~2.Han-jun zou~2.Xiao-min LUO~2.Hua-liang JIANG~(2.3,4)1 Jiangsu Simcere Pharmaceutical Research Company Ltd,Nanjing 2.0042.china 2.Drug Discovery and Design Center,State Key Lab of Drug Research,shanghai institute of Materia Medica,chinese academy of Sciences,shanghai 2.12.3,china 3 School of Pharmacy,East china University of Science and Technology,shanghai 2.02.7,china Jiangsu Simcere Pharmaceutical Research Company Ltd Nanjing 210042ChinaDrug Discovery and Design CenterState Key Lab of Drug ResearchShanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China

Aim:To build up a quantitative structure-activity relationship（QSAR）model of2.（S）-camptothecin（CPT）analogs for the prediction of the activity of new CPTanalogs for drug ***:A training set of 43 structurally diverse CPTanalogs which were inhibitors of topoisomerase I were used to construct a quan-titative structure-activity relationship model with a comparative molecular fieldanalysis（CoMFA）.The QSAR model was optimized using partial least squares（PLS）analysis.A test set of 1. compounds was evaluated using the ***:The CoMFA model was constructed successfully,and a good cross-validated correlation was obtained in which q2.as ***,the analysis ofthe non-cross-validated PLS model in which r2.as 0.935 was built and permitteddemonstrations of high predictability for the activities of the 1. CPT analogs inthe test set selected in ***:The CoMFA model indicated thatbulky negative-charged group at position 9,1. and 1. of CPT would increaseactivity,but excessively increasing bulky group at position 1. is adverse to inhibi-tory activity;substituents that occupy position 7 with the bulky positive groupwill enhance the inhibitive *** model can be used to design new CPTanalogs and understand the mechanism of action.

关键词： comparative molecular field analysis(CoMFA) camptothecin(CPT) topoisomerase I(Top I)