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Development and Application of Neutron Computed Tomography at CARR

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Development and Application of Neutron Computed Tomography a...

2016年全国射线数字成像与CT新技术研讨会

作者： Songbai Han Linfeng He guohai wei Meimei Wu Yu Wang Yuqing Li Hongli Wang Yuntao Liu Dongfeng Chen Neutron Scattering Laboratory Department of Nuclear PhysicsChina Institute of Atomic Energy

Neutron imaging(NI) has unique feature compared with X-ray imaging for the difference of the transmission characteristics through *** sensitivity to light elements,especially hydrogen,and the large penetration length through metals give it special *** has become a particularly useful universal technique for scientific and applied studies in various research *** article reviews the recent development of neutron imaging at China Advanced Research Reactor(CARR),including the instrumentations for indirect and real-time imaging and their application for non-destructive testing of nuclear fuel rod,two-phase flow,fuel cell,rock and concrete,etc.

关键词： Neutron Imaging Computed Tomography China Advanced Research Reactor

来源： cnki会议评论

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接口继电器的选择

冶金动力 2010年第4期 18-19页

作者：卫国海中冶华天工程技术有限公司安徽马鞍山243000

详细介绍了选择接口继电器的注意事项,并从性价比上突出菲尼克斯端子继电器的优点。

关键词：接口继电器选择

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钢筋混凝土T形梁火灾后残余性能有限元分析

低温建筑技术 2021年第4期43卷 42-45,55页

作者：魏国海青岛理工大学土木工程学院山东青岛266033

高温受火后钢筋混凝土构件剩余力学性能准确检验,是火灾以后对结构损伤评定与加固设计的基础。通过ANSYS计算总结T形梁不同参数下的残余承载力与变化规律。研究结果表明,通过对高温后T形梁抗弯承载力和抗弯刚度的计算,发现刚度的损失幅... 详细信息

高温受火后钢筋混凝土构件剩余力学性能准确检验,是火灾以后对结构损伤评定与加固设计的基础。通过ANSYS计算总结T形梁不同参数下的残余承载力与变化规律。研究结果表明,通过对高温后T形梁抗弯承载力和抗弯刚度的计算,发现刚度的损失幅度很大,且前30min内损伤更严重,后期损伤幅度逐渐变缓,与刚度变化趋势不同,高温后抗弯承载力损失幅度并不大,这是由于钢筋在恢复到常温后强度也随之恢复,承载力的损失主要是受压区混凝土的损失。通过增加保护层厚度可以减缓受拉钢筋的受热速度,有效的减缓构件的损伤。单独对带裂缝梁的火灾情况进行分析,与不带裂缝的梁进行对比,得出裂缝的存在加速了混凝土梁的损伤速度。

关键词： T型梁数值模拟刚度承载力

Boosting Oxygen Evolution Reaction Performance on NiFe‑Based Catalysts Through d‑Orbital Hybridization

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Nano-Micro Letters 2025年第1期17卷 281-292页

作者： Xing Wang wei Pi Sheng Hu Haifeng Bao Na Yao wei Luo State Key Laboratory of New Textile Materials and Advanced Processing Technology Key Laboratory of New Textile Materials and Applications of Hubei ProvinceSchool of Materials Science and EngineeringWuhan Textile UniversityWuhan 430200People’s Republic of China College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072People’s Republic of China

Anion-exchange membrane water electrolyzers(AEMWEs)for green hydrogen production have received intensive attention due to their feasibility of using earth-abundant NiFe-based *** introducing a third metal into NiFe-based catalysts to construct asymmetrical M-NiFe units,the d-orbital and electronic structures can be adjusted,which is an important strategy to achieve sufficient oxygen evolution reaction(OER)performance in ***,the ternary NiFeM(M:La,Mo)catalysts featured with distinct M-NiFe units and varying d-orbitals are reported in this *** and theoretical calculation results reveal that the doping of La leads to optimized hybridization between d orbital in NiFeM and 2p in oxygen,resulting in enhanced adsorption strength of oxygen intermediates,and reduced rate-determining step energy barrier,which is responsible for the enhanced OER *** critically,the obtained NiFeLa catalyst only requires 1.58 V to reach 1 A cm^(−2) in an anion exchange membrane electrolyzer and demonstrates excellent long-term stability of up to 600 h.

关键词： NiFe-based catalysts d-orbital coupling Oxygen evolution reaction Anion exchange membrane electrolyzer

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中子小角散射实验及原始数据的处理

核技术 2010年第4期33卷 253-257页

作者：魏国海刘祥锋李天富张莉王雨王洪立中国原子能科学研究院中子散射研究室北京102413 中国国际工程咨询公司北京100048

中子小角散射技术是研究纳米尺度范围材料结构的有力工具。中子小角散射实验测量和原始数据的处理方法相对较复杂。为了获得样品的绝对中子小角散射强度数据,通常需要进行入射中子束强度、散射强度、样品的透射率、实验本底以及空样品... 详细信息

中子小角散射技术是研究纳米尺度范围材料结构的有力工具。中子小角散射实验测量和原始数据的处理方法相对较复杂。为了获得样品的绝对中子小角散射强度数据,通常需要进行入射中子束强度、散射强度、样品的透射率、实验本底以及空样品盒的散射强度和透射率等多项实验测量。若要获取较宽散射矢量范围的实验数据,还要改变实验仪器设置,对同一样品进行几次测量。而对所测数据也需要进行多项处理,才可获得便于分析的小角散射强度曲线。本文简单介绍实验原理和测量方法,重点讨论原始数据的处理方法,其中详细讨论了各向同性散射数据的平均以及合并方法。

关键词：中子小角散射实验测量原始数据处理

From text to image:challenges in integrating vision into ChatGPT for medical image interpretation

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Neural Regeneration Research 2025年第2期20卷 487-488页

作者： Shunsuke Koga wei Du Department of Pathology and Laboratory Medicine Hospital of the University of PennsylvaniaPhiladelphiaPAUSA

Large language models(LLMs),such as ChatGPT developed by OpenAI,represent a significant advancement in artificial intelligence(AI),designed to understand,generate,and interpret human language by analyzing extensive text *** potential integration into clinical settings offers a promising avenue that could transform clinical diagnosis and decision-making processes in the future(Thirunavukarasu et al.,2023).This article aims to provide an in-depth analysis of LLMs’current and potential impact on clinical *** ability to generate differential diagnosis lists underscores their potential as invaluable tools in medical practice and education(Hirosawa et al.,2023;Koga et al.,2023).

关键词： image diagnosis text

Record-breaking bifunctional oxygen electrocatalyst accomplished by a data-driven approach for zinc-air batteries

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Journal of Energy Chemistry 2025年第1期100卷 144-145页

作者： Deviprasath Chinnadurai Zhi wei Seh Institute of Materials Research and Engineering (IMRE) Agency for Science Technology and Research (A*STAR)

Rechargeable zinc-air batteries(ZABs) have recently drawn great attention in energy research due to their high theoretical capacity,low costs, and inherently safe nature [1–3]. However, the sluggish cathode reactions necessitate the development of bifunctional oxygen electrocatalysts with lower ΔE indicator values. The ΔE indicator is commonly employed to quantitatively evaluate the electrocatalytic activity of a bifunctional oxygen electrocatalyst,representing the overall overpotential from oxygen reduction reaction(ORR) to oxygen evolution reaction(OER).

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Fabrication and Mechano-sensing Characteristics of Bending Polypyrrole Actuator

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 240-245页

作者： CHEN Jinyou HU wei School of Automotive Engineering Hunan Financial&Industrial Vocational-technical CollegeHengyang 421002China College of Mechanical and Electrical Engineering Hunan Agricultural UniversityChangsha 410128China

To prepare a conductive polymer actuator with decent performance,a self-built experimental platform for the preparation of polypyrrole film is *** of the essential goals is to examine the mechanical characteristics of the actuator in the presence of various combinations of process parameters,combined with the orthogonal test method of"four factors and three levels".The bending and sensing characteristics of actuators of various sizes are methodically examined using a self-made bending polypyrrole *** functional relationship between the bending displacement and the output voltage signal is established by studying the characteristics of the actuator sensor subjected to various degrees of *** experimental results reveal that the bending displacement of the actuator tip almost exhibits a linear variation as a function of length and *** the voltage reaches 0.8 V,the bending speed of the actuator tends to be ***,the mechanical properties of the self-assembled polypyrrole actuator are verified by the design and fabrication of the microgripper.

关键词： conductive polymer polypyrrole mechanical characteristics actuators sensing characteristics

核燃料元件三维中子成像定量无损检测方法研究

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核动力工程 2017年第S1期38卷 71-73页

作者：魏国海陈东风韩松柏刘蕴韬武梅梅贺林峰王雨中国原子能科学研究院中子散射实验室北京102413

中子照相是无损检测技术(NDT)中的一种。可用于检测核燃料元件内部缺陷、确定燃料芯块中^(235)U富集度、检测燃料内可燃毒物、确定包壳氢聚的位置及含量等。传统的核燃料元件中子照相方法获得二维检测成像,无法获得芯块碎片形貌、芯块... 详细信息

中子照相是无损检测技术(NDT)中的一种。可用于检测核燃料元件内部缺陷、确定燃料芯块中^(235)U富集度、检测燃料内可燃毒物、确定包壳氢聚的位置及含量等。传统的核燃料元件中子照相方法获得二维检测成像,无法获得芯块碎片形貌、芯块内部颗粒分布、包壳破损状态等缺陷的三维立体形态信息。本文介绍在中国先进研究堆(CARR)及德国亥姆霍兹柏林研究中心(HZB)开展的核燃料元件三维中子成像定量NDT方法研究。缺陷的三维定量可获得内部杂质的三维成像,并可定量测量相关参数。包壳氢聚的三维测量可实现几乎所有包壳位置的氢聚含量定量测量。

关键词：核燃料元件中子照相无损检测(NDT) 中国先进研究堆(CARR)