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

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

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节线半金属AlB_(2)水环境下发生吸附后拓扑表面态变化

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物理学报 2024年第12期73卷 350-358页

作者：朱庞栋王长昊王如志北京工业大学材料科学与工程学院新能源材料与技术研究所新型功能材料教育部重点实验室北京100124

拓扑半金属,作为一种独特的拓扑电子态,近年来因其固有的拓扑特性和潜在的器件应用而备受研究关注.体-边界对应是拓扑半金属的一个关键特征,这意味着如果在体相中存在非平庸的能带拓扑,那么在表面会存在受拓扑保护导电状态,即拓扑表面态... 详细信息

拓扑半金属,作为一种独特的拓扑电子态,近年来因其固有的拓扑特性和潜在的器件应用而备受研究关注.体-边界对应是拓扑半金属的一个关键特征,这意味着如果在体相中存在非平庸的能带拓扑,那么在表面会存在受拓扑保护导电状态,即拓扑表面态(topological surface state,TSS).这一特征使其在电催化研究领域备受关注.本文采用第一性原理计算手段研究了AlB_(2)材料的拓扑性质,并构建(010)表面A1端面和B端面平板模型,计算得到了TSS的位置.研究了AlB_(2)表面吸附特性,发现Al端面氢吸附吉布斯自由能(ΔG_(H*))仅为-0.031 eV,相较于商业电催化析氢(hydrogen evolution reaction,HER)催化剂Pt的-0.08 eV更接近于0,展现出了优异的HER性能.观察了AlB_(2)表面吸附H,OH和H_(2)O后TSS的变化,发现当H吸附时TSS变化最显著,其次是OH吸附,H_(2)O因其电中性和弱的表面吸附对TSS的影响很微弱.并且在吸附前后,由于受拓扑保护TSS依旧存在,仅是能量发生了改变,证实了其在环境中的稳定性.本工作研究结果为不同吸附物对AlB_(2)的TSS的影响提供了系统的认识,为今后相关领域的理论和实验研究铺平了道路,也为拓扑材料的实际应用提供了理论支撑.

关键词：拓扑半金属拓扑表面态表面吸附

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Study of the response of 10B-doped MCP to wide-energy range neutrons from eV to MeV

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Nuclear Science and Techniques 2024年第8期35卷 132-141页

作者： Qiang Li Li‑Jiao Wang Xiang‑Biao Qiu Jing‑Wen Li Wei Xu Tao Li Ze‑Bin Lin chang‑Jun Ning Yong‑hao Chen Rui‑Rui Fan Kang Sun Jing‑Yu Tang Rong Zhang Han‑Tao Jing Bo Mei 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 Zheng‑Yao Jin Ling Kang Bo Li Chao Li Gong Li Jia‑Wen Li Xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Guang‑Yuan Luan Bin‑Bin Qi Jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan Zhao‑Hui Song Zhi‑Xin Tan Sheng‑Da Tang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu Li‑Kun Xie Yi‑Wei Yang Han Yi 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 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 PhysicsChinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China North Night Vision Science&Technology(Nanjing)Research Institute Co.Ltd. Nanjing 211106China Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China 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 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 Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China USTC Archaeometry Lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China

Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy *** spatial and temporal resolutions are useful for neutron energy-resolved ***,their practical applications still face many technical *** this study,a B-MCP with 10 mol%10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the China Spallation Neutron *** neutron detection efficiency was calibrated at 1 eV,which is approximately 300 times that of an ordinary MCP and indicates the success of 10 B *** factors that caused the reduction in the detection efficiency were simulated and *** neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of *** response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become *** is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons.

关键词： Neutron radiation image 10B-doped MCP Neutron response Wide-energy range neutrons

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江苏省耕地非粮化时空格局演变及驱动因素分析

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长江流域资源与环境 2024年第2期33卷 436-447页

作者：徐畅郭杰易家林欧名豪南京农业大学公共管理学院江苏南京210095 农村土地资源利用与整治国家地方联合工程研究中心江苏南京210095 南京农业大学中国资源环境与发展研究院江苏南京210095

研究江苏省耕地非粮化时空特征及其驱动因素,为保护耕地和保障粮食安全的政策制定提供参考。基于耕地非粮化的影响机制解析,选择江苏省作为研究区域,分析1996~2020年县域耕地非粮化时空格局演变及其驱动机制,并采用主成分分析法研究驱... 详细信息

研究江苏省耕地非粮化时空特征及其驱动因素,为保护耕地和保障粮食安全的政策制定提供参考。基于耕地非粮化的影响机制解析,选择江苏省作为研究区域,分析1996~2020年县域耕地非粮化时空格局演变及其驱动机制,并采用主成分分析法研究驱动机制及其区域分异。结果表明:(1)江苏省耕地非粮化面积和比率呈现倒“U”型的变化趋势,面积由2322.49千hm2上升到2704.78千hm2后降至2072.76千hm2,比率由19.28%上升至35.46%后降至27.72%;(2)全省县域耕地非粮化率分布具有显著空间集聚特征,整体呈现苏南的高高聚集和苏中、苏北的低低聚集为主,前期为苏北低-近沪地区高,后期主要呈现苏中低-苏南高聚集格局;(3)基于长时序面板数据分析发现,地均GDP和城乡居民可支配收入比与耕地非粮化率呈显著正相关,老龄化程度与非粮化率呈显著负相关关系;(4)经济欠发达地区更容易受社会经济因子影响,经济较发达地区非粮化更易受经营者生产决策影响,资源禀赋较差地区更倾向于非粮化种植。

关键词：耕地非粮化作用机制时空格局演变江苏省

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Combined ATAC-seq,RNA-seq,and GWAS analysis reveals glycogen metabolism regulatory network in Jinjiang oyster(Crassostrea ariakensis)

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Zoological Research 2024年第1期45卷 201-214页

作者： Biao Wu Xi Chen Jie Hu Zhen-Yuan Wang Yan Wang Da-You Xu hao-Bing Guo chang-Wei Shao Li-Qing Zhou Xiu-Jun Sun Tao Yu Xiao-Mei Wang Yan-Xin Zheng Guang-Yi Fan Zhi-Hong Liu State Key Laboratory of Mariculture Biobreeding and Sustainable Goods Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdaoShandong 266071China Laboratory for Marine Fisheries Science and Food Production Processes Laoshan LaboratoryQingdaoShandong 266071China BGI-Qingdao BGI-ShenzhenQingdaoShandong 266426China National Demonstration Center for Experimental Fisheries Science Education Shanghai Ocean UniversityShanghai 201306China changdao Enhancement and Experiment Station Chinese Academy of Fishery SciencesYantaiShandong 265800China State Key Laboratory of Agricultural Genomics BGI-ShenzhenShenzhenGuangdong 518083China

Glycogen serves as the principal energy reserve for metabolic processes in aquatic shellfish and substantially contributes to the flavor and quality of *** Jinjiang oyster(Crassostrea ariakensis)is an economically and ecologically important species in *** the present study,RNA sequencing(RNA-seq)and assay for transposase-accessible chromatin using sequencing(ATAC-seq)were performed to investigate gene expression and chromatin accessibility variations in oysters with different glycogen *** identified 9483 differentially expressed genes(DEGs)and 7215 genes with significantly differential chromatin accessibility(DCAGs)were obtained,with an overlap of 2600 genes between ***,a significant proportion of these genes were enriched in pathways related to glycogen metabolism,including“Glycogen metabolic process”and“Starch and sucrose metabolism”.In addition,genome-wide association study(GWAS)identified 526 single nucleotide polymorphism(SNP)loci associated with glycogen *** loci corresponded to 241 genes,63 of which were categorized as both DEGs and *** study enriches basic research data and provides insights into the molecular mechanisms underlying the regulation of glycogen metabolism in ***.

关键词： Crassostrea ariakensis Glycogen Transcriptome ATAC GWAS

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融合边缘优化SLIC和A*算法的影像镶嵌线提取

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遥感信息 2024年第3期39卷 90-96页

作者：常巧梅张浩张娟山西工程职业学院太原030032 中国科学遥感与数字地球研究所北京100094 山西亚太遥感新技术有限公司太原030032

针对遥感影像自动提取镶嵌线穿过独立地物损害地物完整性的问题,提出融合边缘信息优化SLIC和A*算法的影像镶嵌线提取方法。首先,提取影像边缘信息,并将边缘强度因子与影像光谱信息融合;然后,使用优化的简单线性迭代聚类方法对重叠区域... 详细信息

针对遥感影像自动提取镶嵌线穿过独立地物损害地物完整性的问题,提出融合边缘信息优化SLIC和A*算法的影像镶嵌线提取方法。首先,提取影像边缘信息,并将边缘强度因子与影像光谱信息融合;然后,使用优化的简单线性迭代聚类方法对重叠区域影像进行超像素分割,获取地物完整的超像素,并利用数学形态学算子去除孤立噪声与不完整边界;最后,采用曼哈顿距离启发函数提升A*算法的镶嵌线提取效率,获取最优的镶嵌线提取。分析结果表明,该方法可有效提取影像镶嵌线,避免镶嵌线通过独立建筑物,满足后期正射影像制作要求。

关键词：边缘信息简单线性迭代聚类 A*算法镶嵌线提取

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基于修正统一硬化模型的超固结非饱和红黏土边坡稳定分析

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岩土力学 2024年第4期45卷 1233-1241页

作者：柳伟徐长节杜昊东朱怀龙王长虹华东交通大学轨道交通基础设施性能监测与保障国家重点实验室江西南昌330013 江西交通职业技术学院建筑工程学院江西南昌330013 上海大学力学与工程科学学院上海200444

在降雨和水位升降的联合作用下,库岸边坡易发生滑塌现象。采用理想弹塑性Mohr-Coulomb准则,在干湿循环作用下,分析库岸边坡的稳定性,难以反映边坡土的超固结消散等复杂力学特性。以江西省新干航电枢纽库岸边坡为背景,针对弱超固结非饱... 详细信息

在降雨和水位升降的联合作用下,库岸边坡易发生滑塌现象。采用理想弹塑性Mohr-Coulomb准则,在干湿循环作用下,分析库岸边坡的稳定性,难以反映边坡土的超固结消散等复杂力学特性。以江西省新干航电枢纽库岸边坡为背景,针对弱超固结非饱和红黏土,开展非饱和直剪试验,采用反正切函数,描述吸力应力与基质吸力的数学物理关系,提出红黏土的超固结非饱和统一硬化(unified hardening,UH)模型。然后,在UH模型的基础上,采用C++语言,开发FLAC3D的应用程序;利用GeoStudio软件的SEEP/W模块,计算降雨入渗的非饱和渗流场;编写接口程序,导入FLAC3D,开展库岸边坡的稳定性计算。库岸边坡的水平位移明显大于经典的非饱和理想弹塑性模型计算结果,结果表明,修正UH模型能够合理地预测超固结非饱和红黏土库岸边坡的稳定性,为同类库岸边坡工程稳定性分析提供了参考。

关键词：红黏土统一硬化模型吸力应力超固结边坡稳定分析

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Multi-Scale Pore Structure Heterogeneity in Tuff Reservoirs Investigated with Multi-Experimental Method and Fractal Dimensions in chang 7 Formation,Southern Ordos Basin

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Journal of Earth Science 2024年第2期35卷 666-686页

作者： hao Lu Qing Li Dali Yue Dongdong Xia Shenghe Wu Lang Wen Yu He State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China College of Geosciences China University of PetroleumBeijing102249China Petroleum Exploration and Development Institute of SINOPEC Beijing100083China

The tight tuff reservoir is an unusual type of unconventional reservoir with strong ***,there is a lack of research on the microscopic pore structure that causes the heterogeneity of tuff *** the chang 7 Formation in Ordos Basin,China as a case study,carbon-dioxide gas adsorption,nitrogen gas adsorption and high-pressure mercury injection are integrated to investigate the multi-scale pore structure characteristics of tuff ***,the fractal dimension is introduced to characterize the complexity of pore structure in tuff *** this multi-experimental method,the quantitative characterizations of the full-range pore size distribution of four tuff types were obtained and compared in the size ranges of micropores,mesopores and *** dimension curves derived from full-range pores are divided into six segments as D1,D2,D3,D4,D5 and D6 corresponding to fractal characteristics of micropores,smaller mesopores,larger mesopores,smaller macropores,medium macropores and larger macropores,*** macropore volume,average macropore radius and fractal dimension D5 significantly control petrophysical *** larger macropore volume,average macropore radius and D5 correspond to favorable pore structure and good reservoir quality,which provides new indexes for the tuff reservoir *** study enriches the understanding of the heterogeneity of pore structures and contributes to unconventional oil and gas exploration and development.

关键词： tuff reservoir pore structure carbon-dioxide gas adsorption nitrogen gas adsorption high-pressure mercury injection fractal dimension petroleum geology

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碳交易政策下基于技术投资的供应链纵向合作动态减排研究

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控制与决策 2024年第5期39卷 1654-1664页

作者：王道平常敬雅郝玫北京科技大学经济管理学院北京100083

在碳交易政策背景下,以投资碳减排技术的制造商和投资区块链技术的零售商组成的供应链为研究对象,建立基于技术投资的集中决策模型、分散决策模型和纵向合作决策模型,运用微分博弈的方法研究供应链的技术投资决策与纵向合作策略问题,并... 详细信息

在碳交易政策背景下,以投资碳减排技术的制造商和投资区块链技术的零售商组成的供应链为研究对象,建立基于技术投资的集中决策模型、分散决策模型和纵向合作决策模型,运用微分博弈的方法研究供应链的技术投资决策与纵向合作策略问题,并设计双向成本分担契约来协调供应链.研究结果表明:只有当零售商的边际利润满足一定条件时,零售商才会选择与制造商纵向合作,且碳交易政策的存在会使纵向合作的条件变得更加严格;纵向合作能够实现供应链“减排增效”的双重红利;当碳交易价格高于某一阈值时,消费者绿色偏好和绿色信息敏感度的增加会降低供应链成员的技术投资水平;在一定条件下,双向成本分担契约能够完全协调供应链.

关键词：碳交易政策碳减排技术投资区块链技术投资纵向合作动态减排

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Caveolin‑1 is critical for hepatic iron storage capacity in the development of nonalcoholic fatty liver disease

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Military Medical Research 2024年第2期11卷 206-227页

作者： Guang-Hui Deng Chao-Feng Wu Yun-Jia Li hao Shi Wei-Chao Zhong Mu-Keng Hong Jun-Jie Li Jia-Min Zhao chang Liu Meng-Chen Qin Zhi-Yun Zeng Wei-Min Zhang Ken Kin Lam Yung Zhi-Ping Lv Lei Gao Department of Gastroenterology Integrated Hospital of Traditional Chinese MedicineSouthern Medical UniversityGuangzhou 510315China School of Traditional Chinese Medicine Southern Medical UniversityGuangzhou 510515China Department of Hepatology Cancer CenterIntegrated Hospital of Traditional Chinese MedicineSouthern Medical UniversityGuangzhou 510315China Shenzhen Traditional Chinese Medicine Hospital Shenzhen 518033GuangdongChina Department of Biology Hong Kong Baptist UniversityKowloon TongKowloonHong Kong SAR 999077China

Background:Nonalcoholic fatty liver disease(NAFLD)is associated with disordered lipid and iron *** previous study has substantiated the pivotal role of Caveolin-1(Cav-1)in protecting hepatocytes and mediating iron metabolism in the *** study aimed to explore the specific mechanisms underlying the regulation of iron metabolism by Cav-1 in ***:Hepatocyte-specific Cav-1 overexpression mice and knockout mice were used in this ***-1-knockdown of RAW264.7 cells and mouse primary hepatocytes were performed to verify the changes in ***,a high-fat diet and palmitic acid plus oleic acid treatment were utilized to construct a NAFLD model in vivo and in vitro,respectively,while a high-iron diet was used to construct an in vivo iron overload ***,iron concentration,the expression of Cav-1 and iron metabolism-related proteins in liver tissue or serum were detected using iron assay kit,Prussian blue staining,Western blotting,immunofluorescence staining,immunohistochemical staining and *** related indicators of lipid metabolism and oxidative stress were evaluated by the corresponding reagent kit and ***:Significant disorder of lipid and iron metabolism occurred in *** expression of Cav-1 was decreased in NAFLD hepatocytes(P<0.05),accompanied by iron metabolism ***-1 enhanced the iron storage capacity of hepatocytes by activating the ferritin light chain/ferritin heavy chain pathway in NAFLD,subsequently alleviating the oxidative stress induced by excess ferrous ions in the ***,CD68^(+) CD163^(+) macrophages expressing Cav-1 were found to accelerate iron accumulation in the liver,which was contrary to the effect of Cav-1 in *** correlations were also observed between the serum Cav-1 concentration and the serum iron-related protein levels in NAFLD patients and healthy volunteers(P<0.05).Conclusions:These findings confirm that Cav-1 is an essential target protein that reg

关键词： Caveolin-1 Nonalcoholic fatty liver disease Iron metabolism Ferritin Oxidative stress

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