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Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at CSNS Back-n

火山作用与地球层圈演化——全国第四次火山学术研讨会

作者： zhao li~1 Zhang zhaochong~(1,2) Yan Shenghao~3 Chen Bailin~4 Zhou Gang~5 HeYongkang~5 Chai Fengmei~2 He lixin~5 1. State Key laboratory of geological Processes and mineral Resources, China University of Geosciences, beijing 100083 2. institute of geology, chinese academy of geological sciences, beijing 100037 3. institute of mineral Resources, chinese academy of geological sciences, beijing 100037 4. institute of Geomechanics, chinese academy of geological sciences, beijing 100081 5. No. 4 geological Party, Xinjiang Bureau of geology and Resources, Aertai, Xinjiang

＜正＞ The Altay orogenic belt, Xinjiang Uygur Autonomous Region in NW China, represents one of the important sites of juvenile crustal growth during the Phanerozoic time. However, some important issues, e.g., tectonic evolution and petrogenesis, still remain controversial. Two layers of the picritic rocks in the south margin of the Altay orogenic belt, were discovered in the lower part of marine volcanic-sedimentary

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Nuclear Science and Techniques 2024年第1期35卷 178-187页

作者： Sheng-Da Tang Yong-Hao Chen Jing-Yu Tang Rui-Rui Fan Qiang li Gong li Dong liu Zheng-Yao Jin Xing-Zhu Cui Tian-Xiang Chen Yi-Wei Yang Rong liu Han Yi Yang li Zhen Yang Qi An Hao-Fan Bai Jiang-Bo Bai Jie Bao Ping Cao Qi-Ping Chen Zhen Chen Zeng-Qi Cui An-Chuan Fan Chang-Qing Feng Fan-Zhen Feng Ke-Qing Gao min-Hao Gu Chang-Cai Han Zi-Jie Han Guo-Zhu He Yong-Cheng He Yang Hong Yi-Wei Hu Han-Xiong Huang Wei-Hua Jia Hao-yu Jiang Wei Jiang Zhi-jie Jiang ling Kang Bo li Chao li Jia-Wen li Xiao li Jie liu Shu-Bin liu Guang-Yuan Luan Chang-Jun Ning Bin-Bin Qi Jie Ren Zhi-Zhou Ren Xi-Chao Ruan zhao-Hui Song Kang Sun Zhi-Xin Tan li-Jiao wang Peng-Cheng wang zhao-Hui wang Zhong-Wei Wen Xiao-Guang Wu Xuan Wu li-Kun Xie Yong-Ji Yu Guo-Hui Zhang lin-Hao Zhang Mo-Han Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-liang Zhang Yue Zhang Zhi-Yong Zhang Mao-Yuan zhao Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu Sino-French institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China institute of High-Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China USTC Archaeometry Laboratory University of Science and Technology of ChinaHefei 230026China institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China 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 Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Northwest institute of Nuclear Technology Xi’an 710024China University of chinese academy of sciences Beijing 100049China

Nondestructive and noninvasive neutron assays are essential applications of neutron *** resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an *** back-streaming neutron line(Back-n)is a newly built time-of-flight facility at the China Spallation Neutron Source(CSNS)that provides neutrons in the eV to 300 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test *** results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at *** study reveals its potential future applications.

关键词： CSNS White neutron beam NRTA Nuclide identification Nondestructive method

Quantitative estimation of the shrub canopy LAI from atmosphere-corrected HJ-1 CCD data in Mu Us Sandland

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Science China Earth sciences 2010年第S1期53卷 26-33页

作者： CHEN Wei1,2,CAO ChunXiang1,HE QiSheng1,2,GUO HuaDong3,ZHANG Hao1,2,li RenQiang4,ZHENG Sheng1,2,XU min1,2,GAO MengXu1,2,zhao Jian1,2,li Sha1,NI Xiliang1,2,JIA HuiCong1,JI Wei1,TIAN Rong1,2,liU Cheng1,2,zhao YuXing5 & li JingLu6 1 State Key Laboratory of Remote Sensing Science,Jointly Sponsored by the institute of Remote Sensing Applications of chinese academy of sciences and beijing Normal University,beijing 100101,China 2 Graduate University of chinese academy of sciences,beijing 100049,China 3 Center for Earth Observation and Digital Earth,chinese academy of sciences,beijing 100190,China 4 China Key Laboratory of Ecological Network Observation and Modeling,institute of Geographical sciences and Natural Resources Research,chinese academy of sciences,beijing 100101,China 5 Ordos Forestry Sand Control Science institute,Dongsheng 017000,China 6 Inner Mongolia Biomass Thermoelectricity limited Company,Wushen 017300,China State Key Laboratory of Remote Sensing Science Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University Beijing China Graduate University of chinese academy of sciences Beijing China Center for Earth Observation and Digital Earth Chinese Academy of Sciences Beijing China China Key Laboratory of Ecological Network Observation and Modeling Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China Ordos Forestry Sand Control Science institute Dongsheng China Inner Mongolia Biomass Thermoelectricity limited Company Wushen China

The leaf area index(LAI) is an important ecological parameter that characterizes the interface between vegetation canopy and the *** addition,it is used by most process-oriented ecosystem *** paper investigates the potential of HJ-1 CCD data combined with linear spectral unmixing and an inverted geometric-optical model for the retrieval of the shrub LAI in Wushen Banner of Inner Mongolia in the Mu Us ***(Moderate Resolution Atmospheric Radiance and Transmittance Model) was used for atmospheric *** was extracted using the threshold of the normalized difference vegetation index,with which water bodies and farmland were separated,in combination with a vegetation map of the People's Republic of China(1:1000000).Using the geometric-optical model,we derive the per-pixel reflectance as a simple linear combination of two components,namely sunlit background and *** fraction of sunlit background is related to the shrub *** the support of HJ-1 CCD data,we employ linear spectral unmixing to obtain the fraction of sunlit background in an atmospherically corrected HJ *** addition,we use the measured shrub canopy structural parameters for shrub communities to invert the geometric-optical model and retrieve the pixel-based shrub *** total,18 sample plots collected in Wushen Banner of Inner Mongolia are used for *** results of the shrub LAI show good agreement with R2 of 0.817 and a root-mean-squared error of 0.173.

关键词： shrub leaf area index inversion HJ-1 data geometric-optical model MODTRAN Mu Us Sandland

Bibliometric analysis of the status and trend of biological soil crusts research from 1912 to 2023

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Research in Cold and Arid Regions 2024年第2期16卷 98-108页

作者： XiaoJu Yang FaSi Wu Long li Qinglin Guo ZongRen Yu SongCong Chen XueYong zhao Naiman Desertification Research Station Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China University of chinese academy of sciences Beijing 100049China National Research Center for Conservation of Ancient Wall Paintings and Earthen Sites Dunhuang AcademyDunhuangGansu 736200China Gansu Provincial Research Center for Conservation of Dunhuang Cultural Heritage DunhuangGansu 736200China Cultural Heritage Conservation and Design Consulting Co. Ltd.of Mogao GrottoesDunhuangGansu 736200China

Biological soil crusts(BSCs)play an important role in soil development and ecological function,and it is more important for quantitatively analyzing the processes and trends of BSCs to identify the advantages and disadvantages of BSCs research for the development and application of BSCs *** analysis of 2,186 BSCs literatures from Web of Science showed an exponential growth trend,as China and the United States as the top 2 in terms of publication *** quality publications are mainly from European and American countries,such as the United States,Germany and *** top 3 publishers are Journal of Arid Environments,Soil Biology&Biochemistry and Plant and Soil,and disciplines include ecology,environmental science,and soil science,etc..Research institutions mainly affiliate to the chinese academy of sciences,United States Department of the Interior,United States geological Survey,Hebrew University of Jerusalem,Consejo Superior de Investigaciones Cientificas,and Universidad Rey Juan *** mainly come from United States,Israel,Spain and *** are mainly from the National Natural Science Foundation of China,Spanish Government,chinese academy of sciences,and National Science Foundation of the United *** soil crusts(biocrusts,cyanobacteria,lichens,moss crusts,bryophytes),drylands,climate change,photosynthesis and desert are high-frequency *** research will focus on the driving mechanisms of BSCs on global biogeochemical cycles,maintaining global biodiversity on important ecological processes,global C,N,and P *** impact on biological invasion,sandstorms,and water balance,multifunctional and reciprocal mechanisms for maintaining the stability of desert and sandy ecosystems,and impact on the formulation of management policies for arid ecosystems,corresponding to global climate change,and the estimation of regional,local,and microscale distribution of BSCs based on machine deep learning modeling gradually fo

关键词： Biological soil crusts Bibliometric analysis Web of science CiteSpace VOSviewer

STUDIES ON MECHANISM OF ENTRY OF EB VIRUS INTO NON-B LYMPHOCYTES——ESTABliSHMENT OF AN EB VIRUS-PRODUCING HUMAN-TUPAIA HYBRID CELL liNE TuH18

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Science in China,Ser.B 1984年第3期27卷 284-293页

作者：李以莞吴冰赵志辉衣林刘洪檃黄明王秀琴吴旻 Laboratory of Oncovirology Cancer institute chinese academy of Medical sciences beijing beijing Tianjin Cancer institute chinese academy of Medica1 sciences

With the use of the EB virus-producing lymphoblastoid cell line H18, an attempt wasmade to infect the monolayer cell culture of nasopharyngeal tissue from the normal tupaia,and an EB virus-producing, human-tupaia hybrid cell line was established. The mechanism of entry of EB virus into cells other than B lymphocytes is discussedin this paper.

关键词： EB line EBV STUDIES ON MECHANISM OF ENTRY OF EB VIRUS INTO NON-B LYMPHOCYTES ESTABliSHMENT OF AN EB VIRUS-PRODUCING HUMAN-TUPAIA HYBRID CELL liNE TuH

MODERN　SEISMIC　METHODS　IN　ENGINEERING　INVESTIGATIONS　AT　A　NUCLEAR　POWER　PLANT　SITE

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Scientia Geologica Sinica 1996年第4期 409-417页

作者： Yonggui zhao Hongxiao Jin Chaofan wang Hong Guo Qin li Qilin liao and Jishen Sun (institute of geology, chinese academy of sciences, beijing 100029)

ＭＯＤＥＲＮＳＥＩＳＭＩＣＭＥＴＨＯＤＳＩＮＥＮＧＩＮＥＥＲＩＮＧＩＮＶＥＳＴＩＧＡＴＩＯＮＳＡＴＡＮＵＣＬＥＡＲＰＯＷＥＲＰＬＡＮＴＳＩＴＥＹｏｎｇｇｕｉＺｈａｏ；ＨｏｎｇｘｉａｏＪｉｎ；ＣｈａｏｆａｎＷａｎｇ；Ｈ... 详细信息

ＭＯＤＥＲＮＳＥＩＳＭＩＣＭＥＴＨＯＤＳＩＮＥＮＧＩＮＥＥＲＩＮＧＩＮＶＥＳＴＩＧＡＴＩＯＮＳＡＴＡＮＵＣＬＥＡＲＰＯＷＥＲＰＬＡＮＴＳＩＴＥＹｏｎｇｇｕｉＺｈａｏ；ＨｏｎｇｘｉａｏＪｉｎ；ＣｈａｏｆａｎＷａｎｇ；ＨｏｎｇＧｕｏ；ＱｉｎＬｉ；Ｑｉｌｉ...

关键词： AT NUCLEAR POWER METHODS ENGINEERING

Study on HPLC-DAD Fingerprint of Xueshuan Xinmaining Capsules

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Medicinal Plant 2024年第5期15卷 31-34,49页

作者： Chuang zhao Yuling liU Longfei liN Chunmin wang Hui li Yujie YANG Chengde Medical College Chengde 067000China institute of chinese Medicine China Academy of Chinese SciencesBeijing 100700China Chengde Neck Fukang Pharmaceutical Group Co. Ltd.Chengde 067000China

[Objectives]To establish the HPLC-DAD fingerprint of Xueshuan Xinmaining Capsule(XXC).[Methods]The chromatographic conditions for the analysis of XXC solution were as follows:XSelect HSS T3 column;acetonitrile-0.1%phosphoric acid water was used as mo-bile phase,gradient elution;flow rate:1.0 mL/min;column temperature 30℃;The injection volume is 10μ*** quality of XXC samples produced by different manufacturers was evaluated by similarity evaluation and cluster analysis.[Results]In theHPLC-dad fingerprints of 15 batches of XXC,23 common peaks were identified and 9 peaks were identified,and the similarity was greater than *** to the re-sults of cluster analysis,15 batches of XXC samples could be divided into two categories,S2,S5,S6,S7 and S8 batches belonged to category Ⅰ,and the rest batches belonged to category Ⅱ.[Conclusions]In this study,a representative and universal identification method of Xxc HPLC-DAD fingerprint was *** method has high precision,stability and repeatability,is simple and reliable,and provides a pow-erful reference for further improving the quality evaluation system of XXC.

关键词： Xueshuan Xinmaining Capsule(XXC) HPLC-DAD Fingerprint Identification of chemical component Quality evaluation

Regulation mechanism of EM parameters in natural ferrite and its application in microwave absorbing materials

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Science China(Technological sciences) 2006年第1期49卷 38-49页

作者： ZHENG Yongchun1,2, wang Shijie2, FENG Junming2, li Chunlai1, OUYANG Ziyuan1,2, liU Jianzhong1 & li Xiaobiao2 1. National Astronomical Observatories, chinese academy of sciences, beijing 100012, China 2. State Key Laboratory of Environmental Geochemistry, institute of Geochemistry, chinese academy of sciences, Guiyang 550002, China National Astronomical Observatories Chinese Academy of Sciences Beijing China State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang China

Electromagnetic (EM) parameters (ε ′, ε ″, μ ′, μ″ ) of several M2+Fe2O4 and Fe2O3 type natural ferrites with different geological occurrences are measured in this pa-per. The measurement results show that EM parameters of a magmatic-occurring natural ferrite is very different from other types occurring from sedimentary-metamorphic iron deposit, hydrothermal vein iron deposit, outer contact of magmatic iron deposit. It has potential to be used as magnetic absorbent in microwave absorbing materials. After min-eral separation and concentration, this magmatic-occurring natural ferrite was processed into type A ferrite absorbent. Type A natural ferrite absorbent is a kind of magnetic material with low dielectric constants, high magnetic conductivity and high EM loss. Its EM pa-rameters are ε ′ = 58.60, ε ″ = 10.0, μ ′ = 1.2-1.5, μ ″ = 1.0-1.2, respectively. In order to illuminate the regulation mechanism of EM parameters, we studied the chemical and mineral composition of type A ferrite absorbent. There is high concentration of natural impurities, which regulate the EM parameters of type A ferrite greatly. For comparison, the other types of natural ferrite, single-phase magnetite and two-phase iron minerals (ilmen-ite and magnetite), have few impurity. Thus regulation mechanism of EM parameters was absent in these ferrites. As a result, the regulation of EM parameters is advantageous to develop type A natural ferrite as excellent absorbent, lowers the reflectivity coefficients and enhances the absorbing efficiency of MAM made from it. Furthermore, the impurities in type A natural ferrite and its effects on EM parameters are very difficult to simulate in the synthesize ferrite. The carbonyl-iron powder is another kind of absorbent that is used ex-tensively in MAM. To compare the absorbing properties of these two absorbent, type A natural ferrite and carbonyl-iron powder were mixed with rubber and processed into mi-crowave absorbing sheets with the same procedures and tec

关键词： natural impure ferrite, complex permittivity, complex permeability, microwave absorbing materials.

Suppressing the multimodal size distribution of InAs/GaAs quantum dots through flattening the surface fluctuation

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Science China(Physics,Mechanics & Astronomy) 2010年第5期53卷 788-792页

作者： wang Lu1,2,li MeiCheng1,wang WenXin2,GAO HanChao2,TIAN HaiTao2,XIONG min1 & zhao lianCheng1 1 School of Material Science and Technology,Harbin institute of Technology,Harbin 150001,China 2 National Laboratory for Condensed Matter Physics,institute of Physics,chinese academy of sciences,beijing 100190,China School of Material Science and Technology Harbin Institute of Technology Harbin China National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing China

A method of suppressing the multimodal size distribution of InAs/GaAs quantum dots(QDs) using molecular beam epitaxy through flattening the substrate surface is reported in this *** is found that the surface roughness plays an important role in the growth of QDs through continuous surface evolution(SEQDs).SEQDs are the main components of small QD ensemble in QDs with multimodal size *** is suggested that most of the SEQDs are very likely to nucleate during the growth interruption rather than during the *** growth of QDs on a smoother surface has largely reduced the density of *** photoluminescence line width of uniform QDs is found to be only 17 meV at a low temperature.

关键词： quantum dots multimodal surface fluctuation

Genetic diversity and population structure analysis of Capsicum germplasm accessions

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Journal of Integrative Agriculture 2019年第6期18卷 1312-1320页

作者： GU Xiao-zhen CAO Ya-cong ZHANG Zheng-hai ZHANG Bao-xi zhao Hong ZHANG Xiao-min wang Hai-ping li Xi-xiang wang li-hao The Key Laboratory of Biology and Genetic Improvement of Horticultural Crops Ministry of Agriculture and Rural Affairs/Institute of Vegetables and FlowersChinese Academy of Agricultural SciencesBeijing 100081P.R.China National Mid-term Genebank for Vegetables Institute of Vegetables and FlowersChinese Academy of Agricultural SciencesBeijing 100081P.R.China

Genetic diversity plays an essential role in plant breeding and *** is an important vegetable and spice crop *** genetic diversity of 1 904 accessions of pepper conserved at the National Mid-term Genebank for Vegetables,beijing,China was analyzed based on 29 simple sequence repeat(SSR)markers,which were evenly distributed over 12 pepper *** pepper accessions were divided into two groups in a genetic structure analysis,and the two groups showed obvious differences in fruit type and geographical *** finally selected 248 accessions capturing 75.6%of the SSR alleles as the core collection for further *** into the genetic structure of pepper provide the basis for population-level gene mining and genetic improvement.

关键词： Capsicum germplasm SSR genetic diversity core collection