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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

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Recursive Filter with Partial Knowledge on Inputs and Outputs

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International Journal of Automation and computing 2015年第1期12卷 35-42页

作者： jinya Su Baibing li Wen-Hua Chen Department of Aeronautical and Automotive Engineering Loughborough University School of Business and Economics Loughborough University

This paper investigates the problem of state estimation for discrete-time stochastic linear systems, where additional knowledge on the unknown inputs is available at an aggregate level and the knowledge on the missing measurements can be described by a known stochastic distribution. Firstly, the available knowledge on the unknown inputs and the state equation is used to form the prior distribution of the state vector at each time step. Secondly, to obtain an analytically tractable likelihood function, the effect of missing measurements is broken down into a systematic part and a random part, and the latter is modeled as part of the observation noise. Then, a recursive filter is obtained based on Bayesian inference. Finally, a numerical example is provided to evaluate the performance of the proposed methods.

关键词： Bayesian inference,Kalman filter,missing measurements,state estimation,unknown inputs

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Efficient synthesis of cyclic carbonates under atmospheric CO_(2) by DMAP-based ionic liquids: the difference of inert hydrogen atom and active hydrogen atom in cation

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Green Chemical Engineering 2023年第3期4卷 285-293页

作者： Zhengkun Zhang JinYa Li Guanyao Yu Chao Zeng Menglong Wang Susu Huang li Wang Jinglai Zhang Henan Province Engineering Research Center of Green Anticorrosion Technology for Magnesium Alloys Henan UniversityKaifeng475004China Henan Engineering Research Center of Corrosion and Protection for Magnesium Alloys Henan UniversityKaifeng475004China College of Chemistry and Chemical Engineering Henan UniversityKaifeng475004China

The coupling reaction of carbon dioxide(CO_(2)) and epoxides is one of the most efficient pathways to achieve the carbon balance.However,to accomplish it under the mild conditions,especially under the atmospheric pressure,is still a perplexing problem.Three novel ionic liquids(ILs),[DMAPBrPC][TMGH],[DMAPBrPC][DBUH],and[DMAPBrPC][BTMA],are designed and synthesized.All of them display the excellent catalytic activity for the title reaction achieving the yield over 96.6% under the atmospheric CO_(2) pressure at 60℃.Interestingly,[DMAPBrPC][BTMA]with the inert hydrogen atom in cation exhibits the superior catalytic activity as compared to other two ILs with the protic hydrogen atom in cation along with the same anion.The active hydrogen atom in[DMAPBrPC][TMGH]and[DMAPBrPC][DBUH]would impede the–COO^(-)group to absorb CO 2,which is an unfavorable item for the reaction.Moreover,the strong hydrogen bond in[DMAPBrPC][TMGH]and[DMAPBrPC][DBUH]would lessen the nucleophilic ability of Br^(-) anion resulting in the inferior catalytic performance,which is further confirmed by the density functional theory(DFT)calculations.The cation without the active hydrogen atom could also be employed to design the ILs with the excellent catalytic feature when it is combined with the suitable anion.

关键词： Carbon dioxide DMAP-based ionic liquids Inert hydrogen atom DFT calculations Atmospheric pressure

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Testing final closure time of the Paleo-Asian Ocean along the Solonker suture by a transition of compressional and extensional setting

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Geoscience Frontiers 2020年第6期11卷 1935-1951页

作者： Haidong Zhang Jianchao liu Jinkun Yang Jiakun Ge jinya Wang Zhen li The School of Earth Science and Resources Chang’an UniversityXi’an 710054China Department of Geology Northwest UniversityXi’an 710069China Laboratory of Mineralization and Dynamics Chang’an UniversityXi’an 710054China Anhui Branch of China National Geological Exploration Center of Building Material Industry Hefei 230022China

The giant Central Asian Orogenic Belt is an extensive accretionary orogen,of which the Solonker suture,as a major regional suture,coincides closely with an early Permian paleobiogeographical boundary.This suture is considered to mark the location of the final closure of the Paleo-Asian Ocean between the North China Craton and the Mongolian Terrane.Although the closure time of the Paleo-Asian Ocean along the Solonker suture has generally been regarded as Late Permian-Early Triassic,uncertainty remains because of a lack of typical collisionrelated features(e.g.,high-grade regional metamorphism and well-developed fold-thrust structures)and a scarcity of outcrops.The present study reports Early Permian foliated gabbros and dikes(288-275 Ma)and Middle-Late Permian undeformed layered gabbros,strongly peraluminous granites,and I-type granites(265-254 Ma)in the Xinhure area along the northern margin of the North China Craton.The Early Permian foliated intrusions have a subduction-related geochemical signature and were derived from partial melting of lithospheric mantle modified by subduction-related melts or fluids at the active margin of the North China Craton.In contrast,the Late Permian undeformed layered gabbros and strongly peraluminous granites were derived from partial melting of lithospheric mantle and middle-upper crust,respectively,triggered by asthenospheric upwelling.Therefore,a transition from an end-compressional to an extensional environment according to a transition from collision termination to postcollision of the North China Craton and Mongolian Terrane may have occurred between 275 Ma and 262 Ma.This time span can be considered as the final closure time of the Paleo-Asian Ocean along the Solonker suture.

关键词： Central Asian orogenic belt Solonker suture Layered gabbro Strongly peraluminous granite Paleo-Asian ocean closure time

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伟大建党精神融入高职院校思政课的价值意蕴与实践研究

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林业科技情报 2023年第3期55卷 242-244页

作者：李晋雅运城师范高等专科学校山西运城044000

伟大建党精神是中国精神的着力体现,因其内涵丰富、意义深远,将其融入到高校的思政教育之中具有重要作用。当代青年作为建设强大祖国的主力军,传承并弘扬中国精神是其当担与使命。作为一名高职院校的思政教师,要在思政教育中合理融入伟... 详细信息

伟大建党精神是中国精神的着力体现,因其内涵丰富、意义深远,将其融入到高校的思政教育之中具有重要作用。当代青年作为建设强大祖国的主力军,传承并弘扬中国精神是其当担与使命。作为一名高职院校的思政教师,要在思政教育中合理融入伟大建党精神,为新时期建设培养出意识坚定、品格优秀、不负韶华、忠于祖国、忠于人民的新时代人才。本文主要从伟大建党精神内涵入手,分析伟大建党精神融入到高职院校思政教育的价值意蕴,讨论将伟大建党精神融入到高职院校思政教育的实践路径,希望为当代高职院校思政教育工作提供借鉴思路。

关键词：建党精神高职院校思政教育价值实践

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Lymphopenia predicts disease severity of COVID-19:a descriptive and predictive study

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Signal Transduction and Targeted Therapy 2020年第1期5卷 2129-2131页

作者： li Tan Qi Wang Duanyang Zhang jinya Ding Qianchuan Huang Yi-Quan Tang Qiongshu Wang Hongming Miao Department of Disease Control and Prevention General Hospital of Central Theater Command430015 WuhanHubei provincePeople’s Republic of China Department of Laboratory General Hospital of Central Theater Command430015 WuhanHubei provincePeople’s Republic of China MRC Laboratory of Molecular Biology Cambridge Biomedical CampusCambridge CB20QHUK Department of Biochemistry and Molecular Biology Third Military Medical University(Army Medical University)400038 ChongqingPeople’s Republic of China

Dear Editor,An outbreak of an unknown infectious pneumonia has recently occurred in Wuhan,China.1 The pathogen of the disease was quickly identified as a novel coronavirus(SARS-CoV-2,severe acute respiratory syndrome coronavirus 2),and the disease was named coronavirus disease-19(COVID-19).2 The virus has so far caused 78,959 confirmed cases and 2791 deaths in China according to the reports of government.COVID-19 has been spreading in many countries such as Japan,Korea,Singapore,Iran,and Italia.

关键词： severity acute Lymph

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高职学生社会主义核心价值观生活化实现路径探索

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成才之路 2022年第36期 21-24页

作者：李晋雅运城师范高等专科学校山西运城044000

当前,高职学生社会主义核心价值观培育虽然取得了一些成就,但是仍然存在内容创新不足、形式较为单一、环境仍需优化、管理体系欠缺等问题。这就需要高职院校认真分析社会主义核心价值观的内在优势,充分体现社会主义核心价值观生活化主... 详细信息

当前,高职学生社会主义核心价值观培育虽然取得了一些成就,但是仍然存在内容创新不足、形式较为单一、环境仍需优化、管理体系欠缺等问题。这就需要高职院校认真分析社会主义核心价值观的内在优势,充分体现社会主义核心价值观生活化主体性、隐秘性、辐射性的特点。要丰富教育内容,构建“理论+”课堂;依托社团建设,优化第二课堂;优化校园环境,营造育人氛围;立足日常生活,完善保障机制。

关键词：高职学生社会主义核心价值观生活化路径

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Finite-time disturbance rejection control for robotic manipulators based on sliding mode differentiator 25th

Finite-time disturbance rejection control for robotic manipu...

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第25届中国控制与决策会议

作者： jinya Su Jun Yang Shihua li School of Automation Southeast University Key Laboratory of Measurement and Control of CSE Ministry of Education

ISBN: (纸本)9781467355339

The continuous finite-time high-precision anti-disturbance control problem for robotic manipulators （RM） under external disturbances and parameter uncertainties is investigated in this article. Firstly, a continuous terminal sliding mode control （CTSMC） is introduced to stabilize the nominal dynamics of the RM in finite time. Secondly, a sliding mode differentiator is employed to estimate the lumped disturbances to its nominal dynamics in finite time. By feedforward compensating the estimation of the lumped disturbances, a continuous composite controller is thus obtained for the RM system. The composite controller enjoys the following superior properties: 1) it is continuous and thus no chattering phenomenon appears;2) the finite-time convergence property of the RM system under the proposed controller is guaranteed even in the presence of disturbances and uncertainties;3) the nominal control performance of the proposed method is recovered to the baseline CTSMC method in the absence of disturbances and uncertainties. The excellent properties of the proposed algorithm is demonstrated by simulation studies.

关键词： Continuous finite-time anti-disturbance control Terminal sliding mode Robotic manipulators

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The aboveground biomass of desert steppe and its spatiotemporal variation in western Inner Mongolia

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Research in Cold and Arid Regions 2013年第3期5卷 339-346页

作者： Tian Gao Bin Xu XiuChun Yang YunXiang Jin HaiLong Ma JinYa Li HaiDa Yu Key Laboratory of Agri-informatics Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences

A precise understanding of the aboveground biomass of desert steppe and its spatio-temporal variation is important to understand how arid ecosystems respond to climate change and to ensure that scarce grassland resources are used rationally. On the basis of 756 ground survey quadrats sampled in western Inner Mongolia steppe in 2005-2011 and remote sensing data from the Moderate Resolu- tion Imaging Spectroradiometer （MODIS）--the normalized difference vegetation index （NDVI） dataset for the period of 2001-2011--we developed a statistical model to estimate the aboveground biomass of the desert steppe and further explored the rela- tionships between aboveground biomass and climate factors. The conclusions are as follows：（1） the aboveground biomass of the steppe in the research area was 5.27 Tg （1 Tg=1012 g） on average over 11 years; between 2001 and 2011, the aboveground biomass of the western Inner Mongolia steppe exhibited fluctuations, with no significant trend over time; （2） the aboveground biomass of the steppe in the research area exhibits distinct spatial variation and generally decreases gradually from southeast to northwest; and （3） the important factor causing intemnnual variations in aboveground biomass is precipitation during the period from January to July, but we did not find a significant relationship between the aboveground biomass and the corresponding temperature changes. The precipitation in this period is also an important factor influencing the spatial distribution of aboveground biomass （R2=0.39, P〈0.001）, while the temperature might be a minor factor （R2=0.12, P〈0.01 ）. The uncertainties in our estimate are primarily due to uncertainty in converting the fresh grass yield estimates to dry weight, underestimates of the biomass of shrubs, and error in remote sensing dataset.

关键词： Inner Mongolia desert steppe normalized difference vegetation index （NDVI） aboveground biomass climate factors

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我国高校图书馆阅读推广模式演化研究

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图书情报工作 2018年第22期62卷 5-14页

作者：李倩韩晋雅山西大学经济与管理学院太原030006 中国科学技术信息研究所北京100038

[目的/意义]针对高校图书馆阅读推广模式发展历程进行阶段划分,对每个阶段下模式的构成要素变化情况进行剖析,并指出高校图书馆阅读推广模式未来发展趋势。[方法/过程]5W理论和文献分析法为模式的内涵界定和构成要素分析提供依据; Cites... 详细信息

[目的/意义]针对高校图书馆阅读推广模式发展历程进行阶段划分,对每个阶段下模式的构成要素变化情况进行剖析,并指出高校图书馆阅读推广模式未来发展趋势。[方法/过程]5W理论和文献分析法为模式的内涵界定和构成要素分析提供依据; Citespace可视化工具的处理结果、阅读推广媒介和读者阅读习惯的变化为发展阶段划分提供依据。[结果/结论]高校图书馆阅读推广模式是由其要素在特定时空下排列组合固化而成。其发展分为基于到馆读者的传统纸质阅读推广模式阶段、面向网络用户的数字化阅读推广模式阶段、基于一般用户的手持电子阅读器外借服务推广模式阶段、面向手机用户的微平台互动式阅读推广模式阶段和面向新时代读者的多元化立体阅读推广模式阶段。推广主体专业化、推广方式游戏化、推广对象社会化、推广内容碎片化、效果评估系统化为模式发展趋势。

关键词：高校图书馆阅读推广模式演化 5W传播理论微平台互动式阅读推广多元化立体阅读推广

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