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一种低活化铁素体／马氏体钢的高能重离子辐照效应研究

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原子核物理评论 2009年第1期26卷 48-54页

作者：张崇宏杨义涛宋银 j.s.jang 孙友梅金运范李炳生中国科学院近代物理研究所甘肃兰州730000 Korea Atomic Energy Research Institute Daejeon305-353Korea(South)

低活化的铁素体/马氏体钢是先进核能装置(如聚变堆)的重要候选结构材料。在聚变堆实际工作环境下,由于高温和高氦产生率引起的材料失效是这类材料面临的一个重要问题。本项研究以兰州重离子加速器(HIRFL)提供的中能惰性气体离子束(20Ne,... 详细信息

低活化的铁素体/马氏体钢是先进核能装置(如聚变堆)的重要候选结构材料。在聚变堆实际工作环境下,由于高温和高氦产生率引起的材料失效是这类材料面临的一个重要问题。本项研究以兰州重离子加速器(HIRFL)提供的中能惰性气体离子束(20Ne,122 MeV)作为模拟辐照条件,借助透射电子显微镜,研究了一种低活化的9Cr铁素体/马氏体钢(T92B)组织结构的变化和辐照肿胀。实验结果表明,高温下当材料中晶格原子的撞出损伤和惰性气体原子沉积浓度超过一定限值时,材料内部形成高浓度的空洞,并且空洞肿胀率显著依赖于辐照温度和剂量;在马氏体板条界面及其它晶界处空洞趋于优先形成,并且在晶界交汇处呈加速生长。基于氦泡的形核生长与空洞肿胀的经典模型探讨了在不同辐照条件(He离子、Ne离子、Fe/He离子双束、快中子、Ni离子)下铁素体/马氏体钢中肿胀率数据的关联。

关键词：铁素体/马氏体钢高能重离子辐照损伤空洞肿胀

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浮动式平台对挠性管的疲劳损坏

石油石化节能 1999年第7期11卷 47-49页

作者： j.s.jang V.A.Avakov 曹峰新疆准东石油勘探开发公司信息研究所

我们已经开发出一个PC计算机模型能够准确预测浮动式平台升降对挠性管劳损的作用。这个模型表明。如果操作中不正确评估和预测浮动式平台升降的作用，挠性管劳损会在几分钟或几小时内导致操作失败。

关键词：钻井完井修井挠性管浮动式平台计算机模型

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浮动式平台对挠性管的疲劳损坏

国外油田工程 1999年第7期15卷 47-49页

作者： j.s.jang V.A.Avakov 曹峰新疆准东石油勘探开发公司信息研究所

关键词：钻井挠性管浮动式平台模型疲劳损坏

氧化物粒子弥散强化的合金中界面对高温氦脆的抑制机理研究

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科学通报 2008年第7期53卷 833-837页

作者：张崇宏 j.s.jang 杨义涛宋银孙友梅 H.D.Cho 金运范中国科学院近代物理研究所甘肃兰州730000 Korea Atomic Energy Research Institute Daejeon305-353South Korea

探讨了在0.5Tm(Tm为材料熔点)温度附近一种氧化物粒子弥散强化的铁基合金中惰性气体离子辐照引起的组织结构变化.实验利用高能20Ne离子辐照材料样品至3个剂量水平.借助透射电子显微镜发现,即使在最高辐照剂量,材料的晶界处也没有发生空... 详细信息

探讨了在0.5Tm(Tm为材料熔点)温度附近一种氧化物粒子弥散强化的铁基合金中惰性气体离子辐照引起的组织结构变化.实验利用高能20Ne离子辐照材料样品至3个剂量水平.借助透射电子显微镜发现,即使在最高辐照剂量,材料的晶界处也没有发生空洞的加速生长,显著区别于相同辐照条件下传统铁基合金的组织结构变化.这个特点反映出氧化物粒子弥散强化合金具有在高温和高氦产生率的苛刻环境中(诸如在聚变堆内部)使用的潜力.晶界处空洞生长的抑制效应可归因于材料晶粒内部高密度的氧化物纳米颗粒的界面对惰性气体原子的有效俘获和对辐照缺陷的回复作用.

关键词：氧化物弥散强化合金高能离子辐照氦脆氦泡

HIRFL-sFC新终端ODs铁素体的122MeV Ne离子辐照实验(英文)

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IMP & HIRFL Annual Report 2012年 127-128页

作者：张崇宏 song Yin Yang Yitao Zhang Liqing Gou jie Li jianjian Meng Yancheng jiachao Chen j.s.jang Paul scherrer Institut Villigen PSI Korea Atomic Energy Research Institute

The sector-focused Cyclotron(sFC)at HIRFL is a useful tool to simulate radiation damage in materials candidate to advanced nuclear reactors,because it can supply heavy ions ranging from12C to 238 U in high beam density,with kinetic energies typically in the range 1～10 MeV/u,which can penetrate pure iron up to 31micrometers in depth and produce atomic displacement at a rate around 0.1dpa/*** meet a variety of demand for irradiation of candidate materials,we recently developed a new chamber at the termi-

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Engineering punching shear strength of flat slabs predicted by nature-inspired metaheuristic optimized regression system

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Frontiers of structural and Civil Engineering 2024年第4期18卷 551-567页

作者： Dinh-Nhat TRUONG Van-Lan TO Gia Toai TRUONG Hyoun-seung jang Department of Civil Engineering University of Architecture Ho Chi Minh CityHo Chi Minh City 700000Vietnam Faculty of Civil Engineering and Technology Dong A UniversityDa Nang City 550000Vietnam school of Architecture Seoul National University of Science and TechnologySeoul 01811Republic of Korea

Reinforced concrete(RC)flat slabs,a popular choice in construction due to their flexibility,are susceptible to sudden and brittle punching shear *** design methods often exhibit significant bias and *** estimation of punching shear strength in RC flat slabs is crucial for effective concrete structure design and *** study introduces a novel computation method,the jellyfish-least square support vector machine(js-LssVR)hybrid model,to predict punching shear *** combining machine learning(LssVR)with jellyfish swarm(js)intelligence,this hybrid model ensures precise and reliable *** model’s development utilizes a real-world experimental data *** with seven established optimizers,including artificial bee colony(ABC),differential evolution(DE),genetic algorithm(GA),and others,as well as existing machine learning(ML)-based models and design codes,validates the superiority of the js-LssVR hybrid *** innovative approach significantly enhances prediction accuracy,providing valuable support for civil engineers in estimating RC flat slab punching shear strength.

关键词： punching shear strength reinforced concrete flat slabs machine learning jellyfish search support vector machine

Laser‑Induced and MOF‑Derived Metal Oxide/Carbon Composite for synergistically Improved Ethanol sensing at Room temperature

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Nano-Micro Letters 2024年第6期16卷 210-220页

作者： Hyeongtae Lim Hyeokjin Kwon Hongki Kang jae Eun jang Hyuk‑jun Kwon Department of Electrical Engineering and Computer science DGISTDaegu 42988South Korea Convergence Research Advanced Centre for Olfaction DGISTDaegu 42988South Korea

Advancements in sensor technology have significantly enhanced atmospheric ***,metal oxide and carbon(MO_(x)/C)hybrids have gained attention for their exceptional sensitivity and room-temperature sensing ***,previous methods of synthesizing MO_(x)/C composites suffer from problems,including inhomogeneity,aggregation,and challenges in ***,we introduce a refined method that employs a metal–organic framework(MOF)as a precursor combined with direct laser *** inherent structure of MOFs ensures a uniform distribution of metal ions and organic linkers,yielding homogeneous MO_(x)/C *** laser processing facilitates precise micropatterning(sensor rapidly detected ethanol gas even at room temperature(105 and 18 s for response and recovery,respectively),with a broad range of sensing performance from 170 to 3,400 ppm and a high response value of up to 3,500%.Additionally,this sensor exhibited enhanced stability and thermal resilience compared to previous MOF-based *** research opens up promising avenues for practical applications in MOF-derived sensing devices.

关键词： Metal-organic frameworks Metal oxide Carbon composite Laser Gas sensor

Acupuncture ameliorates atopic dermatitis by modulating gut barrier function in a gut microbiota-dependent manner in mice

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journal of Integrative Medicine 2024年第5期22卷 600-613页

作者： Mijung Yeom sora Ahn Dae-Hyun Hahm sun-Young jang se Hoon jang su-Yang Park jae-Hwan jang jihan Park ju-Young Oh In-seon Lee Kyuseok Kim soon-Kyeong Kwon Hi-joon Park Acupuncture and Meridian science Research Center College of Korean MedicineKyung Hee University Department of Physiology School of MedicineKyung Hee University BioNanocomposite Research Center Kyung Hee University Department of science in Korean Medicine College of Korean MedicineGraduate SchoolKyung Hee University College of Korean Medicine Kyung Hee University Department of Ophthalmology Otorhinolaryngology and Dermatology of Korean MedicineCollege of Korean MedicineKyung Hee University Division of Applied Life science (BK21) Gyeongsang National University Department of Anatomy & Information sciences College of Korean MedicineKyung Hee University

Objective: Atopic dermatitis(AD) is a chronic inflammatory skin disease that may be linked to changes in the gut microbiome. Acupuncture has been proven to be effective in reducing AD symptoms without serious adverse events, but its underlying mechanism is not completely understood. The purpose of this study was to investigate whether the potential effect of acupuncture on AD is gut ***: AD-like skin lesions were induced by applying MC903 topically to the cheek of the *** was done at the Gok-ji(LI11) acupoints. AD-like symptoms were assessed by lesion scores,scratching behavior, and histopathological changes; intestinal barrier function was measured by fecal output, serum lipopolysaccharide levels, histopathological changes, and mRNA expression of markers involved in intestinal permeability and inflammation. Gut microbiota was profiled using 16s rRNA gene sequencing from fecal ***: Acupuncture effectively improved chronic itch as well as the AD-like skin lesions with epidermal thickening, and also significantly altered gut microbiota structure as revealed by β-diversity indices and analysis of similarities. These beneficial effects were eliminated by antibiotic depletion of gut microbiota,but were reproduced in gut microbiota-depleted mice that received a fecal microbiota transplant from acupuncture-treated mice. Interestingly, AD mice had intestinal barrier dysfunction as indicated by increased intestinal permeability, atrophy of the mucosal structure(reduced villus height and crypt depth), decreased expression of tight junctions and mucus synthesis genes, and increased expression of inflammatory mediators in the ileum. Acupuncture attenuated these abnormalities, which was gut ***: Acupuncture ameliorates AD-like phenotypes in a gut microbiota-dependent manner and some of these positive benefits are explained by modulation of the intestinal barrier, providing new perspective for non-phar

关键词： Acupuncture Atopic dermatitis Gut microbiota Intestinal barrier function

When Fleeing Matters:Differences in Escape Behaviours of Three Northeast Asian Anurans

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Asian Herpetological Research 2024年第1期15卷 41-48页

作者： Yoonjung YI Zoljargal PUREVDORj Irina MAsLOVA Yikweon jang Amaël BORZÉE Laboratory of Animal Behaviour and Conservation College of Life SciencesNanjing Forestry UniversityNanjing 210037JiangsuChina Division of Ecoscience and Department of Life sciences Ewha Womans UniversitySeoul 03760Republic of Korea Department of Biology School of MathematicsMongolian State University of EducationUlaanbaatar 210648Mongolia Department of Forest and Environmental Resources Chungnam National UniversityDaejeon 34134Republic of Korea Federal scientific Center of the East Asia Terrestrial Biodiversity Far Eastern Branch of Russian Academy of SciencesVladivostok 690022Russia

Prey species may have their own optimal escape strategy to balance predation risks and the energetic cost of *** species have an advantage when maintaining a short fleeing distance,while others may favour an earlier escape based on microhabitat,size,or body ***,we examined the escape behaviour of the three syntopic Northeast Asian anuran species:Mongolian toads(strauchbufo raddei),Amur brown frogs(Rana amurensis),and japanese treefrogs(Dryophytes japonicus)in Mongolia,Russia,China and DPR *** examined flight initiation distance(FID;the distance from a potential predator to the point when the individual starts to flee)and distance fled(DF;distance between flight initiation and flight termination points)of each species and the effects of microhabitat,sex,and body *** raddei and *** had a longer FID than ***,and *** also had a longer DF than *** trends remained similar when dividing FID and DF by a size proxy(snout-vent length)for all *** suggests that the treefrog *** used a strategy to stay immobile even when they were detected,and the toad *** reacted quicker and more sensitively to predators despite the presence of *** *** had a significantly longer FID than males suggesting that females are more sensitive to predation risk in this species,but body size was not significant for any of the three *** results indicate that the three sympatric species have different escaping strategies,likely related to differences in physiology and crypticity.

关键词： amphibian distance fled escape behaviour flight initiation distance predation