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Influence evaluation of loading conditions during pressurized thermal shock transients based on thermal-hydraulics and structural analyses

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Frontiers of Mechanical Engineering 2018年第4期13卷 563-570页

作者： Jinya KATSUYAMA Shumpei UNO Tadashi WATANABE yinsheng li Japan Atomic Energy Agency Ibaraki 319-1195 Japan Mizuho Information & Research Institute Inc. Tokyo 101-8443 Japan Fukui University Fukui 914-0055 Japan

The thermal hydraulic （TH） behavior of coo- lant water is a key factor in the structural integrity assessments on reactor pressure vessels （RPVs） of pressurized water reactors （PWRs） under pressurized thermal shock （PTS） events, because the TH behavior may affect the loading conditions in the assessment. From the viewpoint of TH behavior, configuration of plant equipment and their dimensions, and operator action time considerably influence various parameters, such as the temperature and flow rate of coolant water and inner pressure. In this study, to investigate the influence of the operator action time on TH behavior during a PTS event, we developed an analysis model for a typical Japanese PWR plant, including the RPV and the main components of both primary and secondary systems, and performed TH analyses by using a system analysis code called RELAP5. We applied two different operator action times based on the Japanese and the United States （US） rules： Operators may act after 10 min （Japanese rules） and 30 min （the US rules） after the occurrence of PTS events. Based on the results of TH analysis with different operator action times, we also performed structural analyses for evaluating thermal-stress distributions in the RPV during PTS events as loading conditions in the structural integrity assessment. From the analysis results, it was clarified that differences in operator action times significantly affect TH behavior and loading conditions, as the Japanese rule may lead to lower stresses than that under the US rule because an earlier operator action caused lower pressure in the RPV.

关键词： structural integrity reactor pressure vessel pressurized thermal shock thermal hydraulic analysis pressurized water reactor weld residual stress

基于双人零和博弈的孤岛微电网有界L2增益负荷频率控制

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电力系统自动化 2024年第3期48卷 93-102页

作者：李寅生王冰陈玉全黄浩乾河海大学能源与电气学院江苏省南京市211100

针对含不确定建模误差和新能源接入的孤岛微电网,提出了一种结合有界L2增益基线控制和扰动补偿的综合负荷频率控制(LFC)方法。首先,推导了微电网的全驱模型,将建模误差和新能源的影响总结成一个综合扰动。为提高系统的鲁棒性,该综合扰... 详细信息

针对含不确定建模误差和新能源接入的孤岛微电网,提出了一种结合有界L2增益基线控制和扰动补偿的综合负荷频率控制(LFC)方法。首先,推导了微电网的全驱模型,将建模误差和新能源的影响总结成一个综合扰动。为提高系统的鲁棒性,该综合扰动被定义成控制信号的对手玩家。进一步,关于扰动抑制的有界L2增益问题被等价成求解综合扰动和控制信号的零和博弈Nash均衡,由此推导出有界L2增益基线控制器。为改善频率的二次控制,设计了基于五阶广义积分观测器的扰动补偿控制,并在此基础上引入了一种针对发电速率约束(GRC)的新型抗发电速率约束(anti-GRC)措施。最后,搭建了16 MW的新能源-柴油混合微电网仿真模型,并在多种工况下对所提出的综合LFC方法进行测试,验证了其有效性。

关键词：孤岛微电网负荷频率控制零和博弈有界L2增益扰动补偿控制发电速率约束

Damage of hippocampal neurons in rats with chronic alcoholism

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Neural Regeneration Research 2014年第17期9卷 1610-1615页

作者： Ailin Du Hongbo Jiang Lei Xu Na An Hui liu yinsheng li Ruiling Zhang Second Affiliated Hospital of Xinxiang Medical University Department of Physiology and Neurobiology Xinxiang Medical University Department of Neurology the Third Affiliated Hospital of Xinxiang Medical University Henan Provincial Key Laboratory of Bio-psychiatry

Chronic alcoholism can damage the cytoskeleton and aggravate neurological deficits. However, the effect of chronic alcoholism on hippocampal neurons remains unclear. In this study, a model of chronic alcoholism was established in rats that were fed with 6% alcohol for 42 days. Endogenous hydrogen sulfide content and cystathionine-beta-synthase activity in the hippocampus of rats with chronic alcoholism were significantly increased, while F-actin expression was decreased. Hippocampal neurons in rats with chronic alcoholism appeared to have a fuzzy nuclear mem- brane, mitochondrial edema, and ruptured mitochondrial crista. These findings suggest that chronic alcoholism can cause learning and memory decline in rats, which may be associated with the hydrogen sulfide/cystathionine-beta-synthase system, mitochondrial damage and reduced expression of F-actin.

关键词： nerve regeneration chronic alcoholism hydrogen sulfide cystathionine-beta-synthase learning memory F-actin mitochondria hippocampus NSFC grant neural regeneration

Behavior and respiration responses of the earthworm Eisenia fetida to soil arsenite pollution

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Pedosphere 2021年第3期31卷 452-459页

作者： Yali WANG Yizhao WU Jo CAVANAGH Xiuhong WANG Jiangping QIU yinsheng li School of Agriculture and Biology Shanghai Jiao Tong UniversityShanghai 200240China School of Environmental Engineering Henan University of TechnologyZhengzhou 450001China Landcare Research P.O.Box 40Lincoln 7640New Zealand

Soil arsenic(As)pollution from mining and industrial sources is a serious issue in China.Earthworms are considered ecosystem engineers and contribute to soil fertility development and maintenance of soil physico-chemical properties.In this study,earthworms were exposed to soils with different sodium arsenite concentrations(0,5,20,and 80 mg As kg^(-1))for 60 d to investigate the changes in soil properties and the responses of the earthworms(e.g.,burrowing activity and respiration).Earthworm burrowing activity decreased with increasing arsenite concentrations,and earthworm respiration was significantly lower in soils with 20 and 80 mg As kg^(-1) compared to 0 mg As kg^(-1).Changes in soil properties were also observed after incubation of As-amended soil with earthworms.Specifically,soil pH decreased,while soil electrical conductivity and contents of soil NH3--N,Olsen-P,and available K increased.Our results suggest that arsenite negatively impacts the metabolic activity of earthworms,leading to reduced burrowing activity,which in turn modifies the effects of earthworms on soil fertility and remediation.

关键词： As contamination earthworm avoidance earthworm burrowing activity maximum burrow length remediation soil property

基于变桨与襟翼协同的降载特性研究及机理分析

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动力工程学报 2024年第7期44卷 1068-1074页

作者：白冬晓王冰李寅生王万成河海大学能源与电气学院南京211100

研究了尾缘襟翼长度、偏转角和攻角对翼型降载特性的影响,并分析其影响机理。结果表明:变桨与尾缘襟翼的协同控制可有效实现挥舞方向上的降载;尾缘襟翼长度越大,尾缘偏转角越小,攻角越远离临界值,降载性能越佳;偏转角增大会导致临界攻... 详细信息

研究了尾缘襟翼长度、偏转角和攻角对翼型降载特性的影响,并分析其影响机理。结果表明:变桨与尾缘襟翼的协同控制可有效实现挥舞方向上的降载;尾缘襟翼长度越大,尾缘偏转角越小,攻角越远离临界值,降载性能越佳;偏转角增大会导致临界攻角位置前移;为实现快速降载,在正偏转角、大攻角下优先选择尾缘控制,其他情况下均优先选择变桨控制;降载特性与翼型及翼缝流体分布密切相关,压差越小,降载性能越好。

关键词：法向力系数静压尾缘襟翼长度襟翼偏转角攻角

Earthworms in soil ecology and organic waste management

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Pedosphere 2021年第3期31卷 373-374页

作者： yinsheng li Zhenjun SUN Feng HU Kevin R.BUTT Joann K.WHALEN School of Agriculture and Biology Shanghai Jiao Tong UniversityShanghai 200240China College of Resources and Environmental Sciences Agricultural UniversityBeijing 100083China College of Resources and Environmental Sciences Nanjing Agricultural UniversityNanjing 210095China School of Natural Sciences University of Central LancashirePreston PR12HEUK Department of Natural Resource Sciences Faculty of Agricultural and Environmental SciencesMcGill UniversityQuebec H9X 3V9Canada

Earthworms are important members of the soil macrofauna.Since C.Darwin(1881)described the important function of earthworms in pedogenesis and in maintenance of soil fertility,there has been continual interest in studying earthworm biology and ecology.Most of the attention in such studies is on earthworm functions in soil nutrient recycling.However,with increasing concerns about the environment,studies using earthworms to mediate organic waste treatment and as an indicator of soil pollution and remediation strategies have grown rapidly in recent years.

关键词： soil fertility pollution

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杜甫对林寿图诗歌创作的影响

闽江学院学报 2024年第1期45卷 11-17页

作者：马誉萌李寅生广西大学文学与文化研究中心广西南宁530004

林寿图是晚清时期的政治家、文学家,也是少陵原杜甫祠堂重修的出资人。在林寿图学诗的过程中,杜甫一直是他诗歌中重要的取法对象,又由于他与杜甫拥有相似的经历,使之与杜甫产生了精神上的共鸣。杜甫对林寿图诗歌创作的影响主要体现在题... 详细信息

林寿图是晚清时期的政治家、文学家,也是少陵原杜甫祠堂重修的出资人。在林寿图学诗的过程中,杜甫一直是他诗歌中重要的取法对象,又由于他与杜甫拥有相似的经历,使之与杜甫产生了精神上的共鸣。杜甫对林寿图诗歌创作的影响主要体现在题材与主题、语词和艺术手法三方面,林寿图还会在诗歌中直接使用杜甫的相关典故,以表达对杜甫的追思。

关键词：林寿图诗歌创作杜甫艺术手法杜甫祠堂

Compressive performance of a foam-filled fiber-reinforced grid beetle elytron plate

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Science China(Technological Sciences) 2023年第3期66卷 830-840页

作者： HAO Ning SONG YiHeng CHEN JinXiang HE ChaoChao li yinsheng Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education Southeast UniversityNanjing 211189China

The compressive mechanical properties,failure modes and foam filler strengthening mechanism and effect of a short basalt fiber-reinforced epoxy resin composite grid beetle elytron plate with a polyvinyl chloride(PVC)foam-filled core(GBEPfc)are investigated via compression experiments and the finite element method.The results are compared with those of a grid plate(GPfc)with the same wall thickness as the GBEPfc.Additionally,a fully integrated preparation method and process are developed for the GBEPfc,with a material composition that is close to the structure and composition of the organism.Increases of more than 20%in the specific compressive strength and specific energy absorption of the GBEPfcrelative to the GPfcare ascertained.The foam provides a constraining force for the fiber composite structure;consequently,the trabeculae and honeycomb walls of the core transition from a lower-order deformation that easily occurs to a higher-order deformation that occurs less readily.The interaction between the core composite structure and PVC foam is described.The GBEPfcdeveloped in this paper is simple in structure and easy to prepare,and the material composition is close to biological prototypes and materials used in practical engineerings,which lays a foundation for the application of beetle elytron plates.

关键词： beetle elytron beetle elytron plate foam-filled sandwich plate basalt fiber-reinforced polymer(BFRP) compressive properties

宝天曼国家级自然保护区蚯蚓物种多样性及其影响因素

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生物多样性 2024年第4期32卷 35-45页

作者：李雪萌蒋际宝张曾鲁刘晓静王亚利吴宜钊李银生邱江平赵琦上海交通大学农业与生物学院上海200240 上海长三角区域生态环境变化与综合治理国家野外科学观测研究站上海200240 河南内乡宝天曼国家级自然保护区管理局河南内乡474350 河南工业大学环境工程学院郑州450001

宝天曼国家级自然保护区独特的地理位置和气候条件使其成为生物多样性研究热点地区之一,但关于该地区蚯蚓物种多样性的研究却十分匮乏。本研究在系统调查宝天曼国家级自然保护区蚯蚓物种的基础上,联合5个线粒体基因(COI、COII、ND1、12S... 详细信息

宝天曼国家级自然保护区独特的地理位置和气候条件使其成为生物多样性研究热点地区之一,但关于该地区蚯蚓物种多样性的研究却十分匮乏。本研究在系统调查宝天曼国家级自然保护区蚯蚓物种的基础上,联合5个线粒体基因(COI、COII、ND1、12S、16S)构建蚯蚓系统发育树,并结合海拔、土壤、凋落物质量等环境因素建立结构方程模型,初步探讨了宝天曼蚯蚓多样性形成的主要影响因素。研究结果表明:(1)宝天曼国家级自然保护区共记录到蚯蚓3科5属14种,多为广布种,其中巨蚓科为优势科;(2)蚯蚓物种数随海拔升高而增加,但500–1,000 m海拔段的蚯蚓α多样性更高,分布也更均匀,符合中间高度膨胀格局;(3)在局域尺度上,海拔高度对蚯蚓物种多样性和系统发育多样性的影响较大,其次为土壤性质和凋落物质量。宝天曼国家级自然保护区蚯蚓物种组成及多样性成因的研究丰富了我国蚯蚓物种库和基因库。

关键词：蚯蚓生物多样性海拔高度宝天曼国家级自然保护区