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

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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Heat-inducible SlWRKY3 confers thermotolerance by activating the SlGRXS1 gene cluster in tomato

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Horticultural Plant Journal 2024年第2期10卷 515-531页

作者： Ying Wang Wenxian Gai Liangdan Yuan Lele Shang Fangman Li Zhao Gong Pingfei Ge Yaru Wang Jinbao Tao Xingyu zhang Haiqiang Dong Yuyang zhang National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops Huazhong Agricultural UniversityWuhanHubei 430070China Hubei Hongshan Laboratory WuhanHubei 430070China

High temperature stress is one of the major environmental factors that affect the growth and development of plants. Although WRKY transcription factors play a critical role in stress responses, there are few studies on the regulation of heat stress by WRKY transcription factors,especially in tomato. Here, we identified a group I WRKY transcription factor, SlWRKY3, involved in thermotolerance in tomato. First, SlWRKY3 was induced and upregulated under heat stress. Accordingly, overexpression of SlWRKY3 led to an increase, whereas knock-out of SlWRKY3 resulted in decreased tolerance to heat stress. Overexpression of SlWRKY3 accumulated less reactive oxygen species(ROS), whereas knock-out of SlWRKY3 accumulated more ROS under heat stress. This indicated that SlWRKY3 positively regulates heat stress in tomato. In addition,SlWRKY3 activated the expression of a range of abiotic stress-responsive genes involved in ROS scavenging, such as a SlGRXS1 gene *** analysis showed that SlWRKY3 can bind to the promoters of the SlGRXS1 gene cluster and activate their expression. Collectively, these results imply that SlWRKY3 is a positive regulator of thermotolerance through direct binding to the promoters of the SlGRXS1 gene cluster and activating their expression and ROS scavenging.

关键词： Tomato WRKY transcription factor SlWRKY3 Thermotolerance SlGRXS1 Gene cluster Abiotic stress

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基于扫描振镜及数字微镜显示器控制的静态体三维显示系统

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光学学报 2024年第8期44卷 52-62页

作者：韩东成杨世植赵强张亮亮邓燕中国科学院安徽光学精密机械研究所大气光学重点实验室安徽合肥230031 中国科技大学研究生院科学岛分院安徽合肥230026 安徽省先进激光技术实验室安徽合肥230037 安徽建筑大学环境与能源工程学院安徽合肥230601 安徽省东超科技有限公司安徽合肥230088

本文介绍了一种波长宽、响应快的静态体三维显示系统,包括显示介质、控制系统及激光系统三部分。实验中,选取具有双频上转换效应的NaYF_(4)∶Er@NaGdF_(4)∶Yb@NaYF_(4)∶Er纳米晶溶液作为显示介质。控制系统选用1024×768的数字微镜显... 详细信息

本文介绍了一种波长宽、响应快的静态体三维显示系统,包括显示介质、控制系统及激光系统三部分。实验中,选取具有双频上转换效应的NaYF_(4)∶Er@NaGdF_(4)∶Yb@NaYF_(4)∶Er纳米晶溶液作为显示介质。控制系统选用1024×768的数字微镜显示器(DMD)及扫描振镜对红外激光进行投影,使用成像光学软件将立体图像的二维切片转换为DMD/扫描振镜的控制信号。激光系统选用1550 nm和850 nm的红外激光,用适当的光学元件调整光束和光路。最终在纳米晶的环己烷溶液中(1 mmol/mL)以30×1024×768的分辨率实现了绿色(532 nm)三维图像体的快速扫描,图像无闪烁、深度线索自然、可360°观看。该显示系统对材料性能要求不高,搭建方便,显示效果明显,为上转换材料在三维显示领域的初步研究及大尺寸体三维显示技术的探究提供了参考。

关键词：体三维显示双步双频上转换 NaYF4纳米晶数字微镜显示器

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基于前视声呐图像的AUV目标识别与跟踪

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舰船科学技术 2024年第5期46卷 115-119页

作者：郑鹏曹园山张超王健徐令令中国船舶科学研究中心、水动力学国家重点实验室江苏无锡214082

声呐图像由于水体不均匀、边界不规则以及声呐设备本身性能的限制,导致图像噪声明显、亮度不均、分辨率低,使得水下AUV装备在使用前视声呐进行水下目标检测时难度较大。针对该问题,基于m750d声呐探测获得的AUV声呐数据,进行了数据提取... 详细信息

声呐图像由于水体不均匀、边界不规则以及声呐设备本身性能的限制,导致图像噪声明显、亮度不均、分辨率低,使得水下AUV装备在使用前视声呐进行水下目标检测时难度较大。针对该问题,基于m750d声呐探测获得的AUV声呐数据,进行了数据提取、高斯滤波处理、扇形映射处理,并采用Jet映射对声呐灰度图像进行了伪彩色映射提高数据标注速度和精度,制作获得了4组2 500张声呐图像的AUV目标检测数据集;采用YOLOv4-tiny目标检测算法开展AUV目标检测研究,研究结果表明该方法在该数据集上表现优秀,mAP@0.50达到94.17%,FPS在22帧左右,说明该轻量级网络在水下AUV目标识别与跟踪应用上具有较好的应用价值。

关键词：前视声呐 Jet映射 AUV目标检测数据集 YOLOv4-tiny目标检测

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Traditional Chinese medicine Pien-Tze-Huang ameliorates LPS-induced sepsis through bile acid-mediated activation of TGR5-STAT3-A20 signalling

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Journal of Pharmaceutical Analysis 2024年第4期14卷 601-614页

作者： Bei Li Yong zhang Xinyuan Liu Ziyang zhang Shuqing Zhuang Xiaoli Zhong Wenbo Chen Yilin Hong Pingli Mo Shuhai Lin Shicong Wang Chundong Yu State Key Laboratory of Cellular Stress Biology School of Life SciencesXiamen UniversityXiamen361102China Fujian Pien Tze Huang Enterprise Key Laboratory of Natural Medicine Research and Development ZhangzhouFujian363000China Xiang'an Hospital of Xiamen University School of MedicineXiamen UniversityXiamen361005China Department of Cardiology Xiamen Key Laboratory of Cardiac ElectrophysiologyXiamen Institute of Cardiovascular DiseasesThe First Affiliated Hospital of Xiamen UniversitySchool of MedicineXiamen UniversityXiamen361003China

Pien Tze Huang(PZH),a class-1 nationally protected traditional Chinese medicine(TCM),has been used to treat liver diseases such as hepatitis;however,the effect of PZH on the progression of sepsis is ***,we reported that PZH attenuated lipopolysaccharide(LPS)-induced sepsis in mice and reduced LPS-induced production of proinflammatory cytokines in macrophages by inhibiting the activation of mitogen-activated protein kinase(MAPK)and nuclear factor-kappa B(NF-κB)***,PZH stimulated signal transducer and activator of transcription 3(STAT3)phosphorylation to induce the expression of A20,which could inhibit the activation of NF-κB and MAPK *** of the bile acid(BA)receptor G protein-coupled bile acid receptor 1(TGR5)in macrophages abolished the effects of PZH on STAT3 phosphorylation and A20 induction,as well as the LPS-induced inflammatory response,suggesting that BAs in PZH may mediate its anti-inflammatory effects by activating ***,deprivation of BAs in PZH by cholestyramine resin reduced the effects of PZH on the expression of phosphorylated-STAT3 and A20,the activation of NF-κB and MAPK signalling,and the production of proinflammatory cytokines,whereas the addition of BAs to cholestyramine resin-treated PZH partially restored the inhibitory effects on the production of proinflammatory ***,our study identifies BAs as the effective components in PZH that activate TGR5-STAT3-A20 signalling to ameliorate LPS-induced sepsis.

关键词： Pien Tze Huang Bile acids Sepsis Inflammation TGR5 STAT3-A20 signalling

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基于双目视觉和圆形标记点的发动机位移精确测试技术

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航空学报 2024年第11期45卷 158-167页

作者：高玉闪闫松张志伟西安航天动力研究所西安710100 航天液体动力全国重点实验室西安710100

为了精确测量发动机静力试验和摇摆试验中结构的三维变形,提出一种基于双目视觉和圆形标记点的高精度位移测量方法,通过在发动机结构表面粘贴反光圆形标记点,并拍摄结构变形过程中的图像序列来识别位移。首先,使用Sobel边缘检测算法提... 详细信息

为了精确测量发动机静力试验和摇摆试验中结构的三维变形,提出一种基于双目视觉和圆形标记点的高精度位移测量方法,通过在发动机结构表面粘贴反光圆形标记点,并拍摄结构变形过程中的图像序列来识别位移。首先,使用Sobel边缘检测算法提取每个圆形标记点的像素级边缘信息;然后,通过基于插值的亚像素边缘检测方法获取亚像素级边缘点,以更准确地确定标记点的位置;最后,利用椭圆最小二乘法对标记点的边缘轮廓进行拟合,从而实现对标记点的精确定位。为了评估该方法的性能,对隔振云台上的静止标记点进行了位移测量。当相机距离标记点0.6 m时,面内2个方向的位移测量标准差分别为0.36μm和0.32μm,离面位移的测量标准差为0.58μm。此外,通过使用位移台提供的标准位移,进一步验证了该算法在处理与相机平面夹角达60°斜面和?12 mm细管路等结构位移测量时的适用性。将该视觉测量系统应用于某发动机机架的静力试验,取得了令人满意的结果。试验表明,该算法能够实时跟踪29个圆形标记点的位移,并且与电感式位移传感器测试结果的最大误差仅为5.6%。与传统的接触式位移测试方法相比,视觉测试方法具有布置迅速、成本低、测量精度高以及增加测量数量不会显著增加工作量等诸多优点,这使其成为一种替代传统位移测试的可靠且有效的方法。

关键词：液体火箭发动机双目视觉圆形标记点亚像素位移

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Coupling N-doping and confined Co_(3)O_(4) on carbon nanotubes by polydopamine coating strategy for pleiotropic water purification

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Rare Metals 2024年第7期43卷 3146-3160页

作者： Wen-Long Tu Gang Wang Yue zhang Hong-yang Zhu Rong-Rong Du Hong-Yao Zhao Sheng Tang Zeng-Jing Guo Jun yang Fu yang Cheng-zhang Zhu School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252000China School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China School of Environmental Science and Engineering Nanjing Tech UniversityNanjing 211816China

The development of effective and sustainable solutions for pleiotropic water purification becomes urgent and *** Fenton-like catalysts for activation of peroxymonosulfate(PMS)to purify organic wastewater show great *** this work,by tuning metal loading with an in-situ polydopamine coating strategy,oxygen vacancy-enriched Co_(3)O_(4) loading on N-doped carbon nanotubes(CNTs)were constructed to enhance PMS activation efficiency for pollutants ***,the obtained modified CNTs afford a well-developed N-containing network structure,which is further endowed with abundant Co(Ⅱ)/Co(Ⅲ)redox cycles and significant metal-carbon *** particular,the surface N doping in CNTs might induce the oriented enrichment of pollutants around the catalyst,which reduces the migration distance and correspondingly improves the utilization of reactive oxidative *** electron transfer efficiency of the catalyst can be further improved by incorporating oxygen vacancy-enriched Co_(3)O_(4).The performance results show that the optimal NC/Co-1 could mineralize 20×10^(-6)of bisphenol A(BPA)by almost 98%in 8 min.A low reaction activation energy(26.05 kJ·mol^(-1))in BPA degradation was demonstrated by the NC/*** importantly,NC/Co-1 can inherit excellent degradation performance towards oxytetracycline,2,4-dichlorophenol,and tetracycline,showing wide practical *** addition,by virtue of the photothermal conversion property,NC/Co-1 achieves an additive function for interfacial solar water evaporation(1.84 kg·m^(-2)·h^(-1),112.51%),showing impressive potential for clean water recovery under complicated environmental pollution conditions.

关键词： Carbon nanotube Advanced oxidation process Co_(3)O_(4) Photothermal conversion Solar water evaporation

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A novel neuroprotective method against ischemic stroke by accelerating the drainage of brain interstitial fluid

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Science China Life Sciences 2024年

作者： Jingge Lian Liu yang Hanbo Tan Shaoyi Su Leonor Serrano Lopes Fangxiao Cheng Junhao yan Yu Fu Wanyi Fu Zhaoheng Xie Jianfei Sun Jicong zhang Zhiqian Tong Yajuan Gao Hongbin Han Key Laboratory of Alzheimer's Disease of Zhejiang Province Institute of Aging School of Mental Health Wenzhou Medical University NMPA Key Laboratory for Evaluation of Medical Imaging Equipment and Technique Department of Radiology Peking University Third Hospital Beijing Key Laboratory of Magnetic Resonance Imaging Technology Institute of Medical Technology Peking University Health Science Center Department of Informatics Technical University of Munich Department of Anatomy and Histology School of Basic Medical Sciences Peking University Department of Neurology Peking University Third Hospital Department of Electronic Engineering Tsinghua University State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University School of Biological Science and Medical Engineering Beihang University

Ischemic stroke is a leading cause of death and disability worldwide. Inflammatory response after stroke determines the outcome of ischemic injury. A recent study has reported an efficient method, epidural arterial implantation(EAI), for accelerating interstitial fluid(ISF)drainage, which provides a promising strategy to clear pro-inflammatory cytokines in the brain extracellular space(ECS). In this study, the method of EAI was modified(m-EAI) to control its function of accelerating the ISF drainage at different time points following ischemic attack. The neuroprotective effect of m-EAI on ischemic stroke was evaluated with the transient middle cerebral artery occlusion(tMCAO)rat model. The results demonstrated the accumulation of IL-1β, IL-6, and TNF-α was significantly decreased by activating m-EAI at 7 d before and immediately after ischemic attack in tMCAO rats, accompanied with decreased infarct volume and improved neurological function. This study consolidates the hypothesis of exacerbated ischemic damage by inflammatory response and provides a new perspective to treat encephalopathy via brain ECS. Further research is essential to investigate whether m-EAI combined with neuroprotective drugs could enhance the therapeutic effect on ischemic stroke.

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Physiological and transcriptome analyses of Chinese cabbage in response to drought stress

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Journal of Integrative Agriculture 2024年第7期23卷 2255-2269页

作者： Lin Chen Chao Li Jiahao zhang Zongrui Li Qi Zeng Qingguo Sun Xiaowu Wang Limin Zhao Lugang zhang Baohua Li State Key Laboratory for Crop Stress Resistance and High-Efficiency Production College of HorticultureNorthwest A&F UniversityYangling 712100China Institute of Vegetables and Flowers Chinese Academy of Agricultural SciencesBeijing 100081China

Chinese cabbage is an important leafy vegetable crop with high water demand and susceptibility to drought *** explore the molecular mechanisms underlying the response to drought,we performed a transcriptome analysis of drought-tolerant and-sensitive Chinese cabbage genotypes under drought stress,and uncovered core drought-responsive genes and key signaling pathways.A co-expression network was constructed by a weighted gene coexpression network analysis(WGCNA)and candidate hub genes involved in drought tolerance were ***,abscisic acid(ABA)biosynthesis and signaling pathways and their drought responses in Chinese cabbage leaves were systemically *** also found that drought treatment increased the antioxidant enzyme activities and glucosinolate contents *** results substantially enhance our understanding of the molecular mechanisms underlying drought responses in Chinese cabbage.

关键词： Chinese cabbage drought stress abscisic acid weighted gene co-expression network analysis glucosinolate

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Efficient Contact between H_(2)O and N-Coordinate Ru Nanoparticles in Three-Dimensionally Ordered Macro/Mesoporous Carbon Boosting Alkaline HER

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Chinese Journal of Chemistry 2024年第2期42卷 164-170页

作者： Jiaqing Luo Chunyu Liu Ruolin zhang Yuanqing Sun Hua Xu Qingying Hu Manxue zhang Jun Li Zhenxing Li Weiyu Song Yuechang Wei Jian Liu State Key Laboratory of Heavy Oil and Bejing Key Lab of Oil&Gas Optical Detection Technology China University of PetroleumBeijing 102249China Laboratory of Heavy Oil at Karamay Ching University of Petroleum-Beijing at KaramayKaramayXinjiang 83400China Basic Research Center for Energy Interdisciplinary College of ScienceChina University of PetroleumBeijing 102249China Petrochemical Research Institute PetroChina Company LimitedBeijing 102206China BeijingNationalLaboratoryfor Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

In this study,a novel approach is proposed to achieve the uniformly dispersed Ru nanoparticles with N coordination loaded on three-dimensionally ordered macro/mesoporous carbon(3DOMMC)through simultaneous pyrolysis of Ru^(3+)and cyanamide on *** an alkaline medium,the synthesized catalysts exhibit exceptional hydrogen evolution reaction(HER)***,Ru-N/3DOMMC demonstrates a significantly low overpotential of 13.8 mV to achieve acrent density of 10 *** exhibits a mass activity 17.5 times higher than that of commercial Pt/*** outstanding performance could be attributed to the ultrahigh Ru dispersion and more efficient contact between active sites and reactant,which derived from the large specific surface area and interconnective three-dimensionally macro/mesopores of 3DOMMC.

关键词： 3DOMMC Hydrogen evolution reaction Electrocatalysis Solid-liquid contact Energy conversion

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