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Nonlocal and strain gradient effects on nonlinear forced vibration of axially moving nanobeams under internal resonance conditions

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Applied Mathematics and Mechanics(English Edition) 2020年第2期41卷 261-278页

作者： Jing WANG yilin zhu Bo ZHANG Huoming SHEN Juan LIU School of Mechanical and Electrical Engineering Southwest Petroleum UniversityChengdu 610500China School of Civil Engineering and Architecture Southwest Petroleum UniversityChengdu 610500China School of Mechanics and Engineering Southwest Jiaotong UniversityChengdu 611756China Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province Chengdu 611756China

Based on the nonlocal strain gradient theory(NSGT), a model is proposed for an axially moving nanobeam with two kinds of scale effects. The internal resonanceaccompanied fundamental harmonic response of the external excitation frequency in the vicinities of the first and second natural frequencies is studied by adopting the multivariate Lindstedt-Poincaré(L-P) method. Based on the root discriminant of the frequencyamplitude equation under internal resonance conditions, theoretical analyses are performed to investigate the scale effects of the resonance region and the critical external excitation amplitude. Numerical results show that the region of internal resonance is related to the amplitude of the external excitation. Particularly, the internal resonance disappears after a certain critical value of the external excitation amplitude is *** is also shown that the scale parameters, i.e., the nonlocal parameters and the material characteristic length parameters, respectively, reduce and increase the critical amplitude,leading to a promotion or suppression of the occurrence of internal resonance. In addition,the scale parameters affect the size of the enclosed loop of the bifurcated solution curves as well by changing their intersection, divergence, or tangency.

关键词： scale effect axially moving nanobeam internal resonance critical amplitude

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A bibliometric analysis of Stirling engine and in-depth review of its application for energy supply systems

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Energy Reviews 2023年第4期2卷 12-34页

作者： Lanlan Zhang Kai Han Yongzhen Wang yilin zhu Shengyuan Zhong Geyu Zhong School of Mechanical Engineering Beijing Institute of TechnologyBeijing100081China School of Energy and Environmental Engineering Hebei University of TechnologyTianjin300401China Innovation Center in Chongqing Beijing Institute of TechnologyChongqing401120China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing100190China Science and Technology Research Institute China Three Gorges CorporationBeijing100038China

With the great advantages and continuous innovations,prolific research efforts have been devoted to the Stirling engine(SE)domain driven by the sustainability *** this study,a bibliometric analysis is conducted to explore the research tend and hotspots of *** country co-authorship,institute co-authorship and keyword networks are engendered from the visual map using VOSviewer,showing China ranks the first with the total number of published articles and the majority publications are presented by Chinese Academy of *** to the highest node centrality,the research findings in USA can be considered the most influential and greatly worthy being referred,particularly represented by the early contribution for thermo-acoustic *** total 7 keyword clusters are classified through the top terms in Citespace and 4 of them are related to its energy supply system,demonstrating the typical application of SE-based combined heat and power(CHP)and integrated multi-energy complementary system have gained much *** on this,a detailed review of SE-based energy supply systems is further conducted through the system forms,4E performance evaluation and soft model combing optimization *** relevant issues hindering the improvement of these terms are summa-rized,providing the potential guides to help develop the SE-based energy supply system.

关键词： Stirling engine Bibliometric analysis Energy supply system 4E performance evaluation Model and optimization

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China's Space Exploration

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Aerospace China 1994年第2期 27-29页

作者： zhu yilin

In this report the author outlines China’s space exploration to date,describes plans for the next decade and proposes a framework for international cooperation in the exploration of

关键词： cooperation Winter radiometer magnetometer payload instruments initially willing lunar urgently

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Current applications of artificial intelligence-based computer vision in laparoscopic surgery

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Laparoscopic, Endoscopic and Robotic Surgery 2023年第3期6卷 91-96页

作者： Kangwei Guo Haisu Tao yilin zhu Baihong Li Chihua Fang Yinling Qian Jian Yang The First Department of Hepatobiliary Surgery Zhujiang HospitalSouthern Medical UniversityGuangzhou 510280China Guangdong Provincial Clinical and Engineering Center of Digital Medicine Guangzhou 510280China The Second Clinical Medical College of Southern Medical University Guangzhou 510280China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

Recent advances in artificial intelligence(AI)have sparked a surge in the application of computer vision(CV)in surgical video *** surgery produces a large number of surgical videos,which provides a new opportunity for improving of CV technology in laparoscopic ***-based CV techniques may leverage these surgical video data to develop real-time automated decision support tools and surgeon training systems,which shows a new direction in dealing with the shortcomings of laparoscopic *** effectiveness of CV applications in surgical procedures is still under early evaluation,so it is necessary to discuss challenges and *** review introduced the commonly used deep learning algorithms in CV and described their usage in detail in four application scenes,including phase recognition,anatomy detection,instrument detection and action recognition in laparoscopic *** currently described applications of CV in laparoscopic surgery are *** of the current research focuses on the identification of workflow and anatomical structure,while the identification of instruments and surgical actions is still awaiting further *** research on the use of CV in laparoscopic surgery should focus on applications in more scenarios,such as surgeon skill assessment and the development of more efficient models.

关键词： Artificial intelligence Computer vision Deep learning Laparoscopic surgery

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China's Communications Satellites and Their Benefits

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Aerospace China 1993年第2期 13-16页

作者： Qi Faren and zhu yilin

Since 1984 China has launched 2 experimental and 4 operational communications satellites which have played an important role in the national e-conomic construction. TV transmission, TV education, long distance telephone and telegraph, data transfer in finance and railway traffic, etc.. This paper describes the status and features of these satellites in detail. Now, a new communications satellite with medium capacity , designated Dong-fanghong-3 (DFH-3), is under development and scheduled to be launched later 1993. It is also the first satellite that will be under commercial management in China.

关键词： scheduled finance telephone railway operational designated traffic thousand antenna Winter

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我国地区产业转移问题研究综述

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生产力研究 2005年第9期 228-230,199页

作者：朱宜林清华大学经济管理学院北京100084

本文对产业转移的理论渊源以及近期学术界关于我国各地区的产业定位、产业转移的实证分析方法、目标模式、影响效果、动力机制和阻碍因素的观点进行了综述,重点介绍了产业转移的理论渊源、推动因素和阻碍原因,并进行了对比分析。

关键词：产业转移理论渊源产业定位动力机制阻碍因素

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Acquired immune thrombotic thrombocytopenic purpura(TTP)associated with inactivated COVID-19 vaccine CoronaVac

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Frontiers of Medicine 2024年第4期18卷 744-751页

作者： Zhangbiao Long Suyu Jiang Honglei Xin Lu Zhang Ruinan Lu Fengqi Liu Yong Xu Linv Wang Jun Wang Xuezhong Zhang Hui Liao Jinning Shi Xue Yan Xiang zhu Ruonan Shao Zijian Li yilin zhu Han Yan Jiao Wu Chao Fang Xiaodong Xi Xiaofeng Shi Department of Hematology The First Affiliated Hospital of Anhui Medical UniversityHefei230022China Department of Hematology The Second Affiliated Hospital of Nanjing Medical UniversityNanjing210003China Department of Hematology The First Affiliated Hospital of Nanjing Medical UniversityJiangsu Province HospitalNanjing210029China Department of Hematology Nanjing Drum Tower HospitalThe Affiliated Hospital of Nanjing University Medical SchoolNanjing210008China Department of Hematology The Affiliated Hospital of Nanjing University of Chinese MedicineThe First Clinical Medical College of Nanjing University of Chinese MedicineNanjing210009China Department of Hematology Zhongda Hospital of Southeast UniversityNanjing210044China Department of Hematology Nanjing First HospitalNanjing Medical UniversityNanjing210006China Department of Hematology The Air Force Hospital of Eastern Theater commandNanjing210016China Department of Hematology Jiangning Hospital Affiliated of Nanjing Medical UniversityNanjing211199China Department of Hematology Nanjing Hospital of Chinese MedicineNanjing210006China Department of Pharmacology School of Basic MedicineTongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious DiseasesHuazhong University of Science and TechnologyThe Key Laboratory for Drug Target Researches and Pharmacodynamic Evaluation of Hubei ProvinceWuhan430030China Shanghai Institute of Hematology State Key Laboratory of Medical GenomicsRuijin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai200025China

Corona virus disease 2019(COVID-19)due to severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infection has affected the whole *** thrombotic thrombocytopenic purpura(TTP)has been reported after administration of mRNA-or adenoviral vector-based COVID-19 vaccines,including ***2-S,BNT162b2,mRNA-1273,and ChAdOx1 ***,whether inactivated vaccines,such as CoronaVac,could cause TTP and whether the symptoms in TTPs caused by inactivated vaccines are different from previously reported cases are *** this study,two cases were *** cases developed TTP after the second CoronaVac vaccination shot,but not the *** demonstrated symptoms of fever,neurological abnormalities,renal dysfunction,thrombocytopenia,and *** patients achieved complete remission through several sessions of plasma exchanges and immune *** incidence of TTP in Nanjing area was *** number of patients with TTP was 12 in 2019,6 in 2020,16 in 2021,and 19 in *** the authors’knowledge,this report is the first report of TTP associated with inactivated COVID-19 vaccine(CoronaVac).The rarity and delayed onset may be due to the relatively milder immune response caused by the inactivated vaccines than mRNA-based *** plasma exchange is a vital treatment for CoronaVac-related TTP,similar to activated vaccine-related TTP.

关键词： thrombotic thrombocytopenia purpura(TTP) corona virus disease 2019(COVID-19) CoronaVac acute respiratory syndrome coronavirus 2(SARS-CoV-2) vaccine

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基于反双曲正弦函数的循环本构模型

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西南石油大学学报（自然科学版） 2021年第6期43卷 22-32页

作者：朱一林王凯西南石油大学土木工程与测绘学院四川成都610500 油气藏地质及开发工程国家重点实验室·西南石油大学四川成都610500 四川大学建筑与环境学院四川成都610065

为改善本构模型对循环变形应力应变滞回环的预测能力,基于反双曲正弦函数提出了一个新的随动硬化律。在该硬化律中,背应力分为长程、中程和短程3部分,并且每部分都符合“A F”硬化律的演化形式(即包含线性项和动态恢复项)。在长程和中... 详细信息

为改善本构模型对循环变形应力应变滞回环的预测能力,基于反双曲正弦函数提出了一个新的随动硬化律。在该硬化律中,背应力分为长程、中程和短程3部分,并且每部分都符合“A F”硬化律的演化形式(即包含线性项和动态恢复项)。在长程和中程背应力中,动态恢复系数逐渐演化以描述大变形瞬态包辛格效应,并且系数中引入了棘轮系数以描述材料的棘轮行为;在短程背应力中,线性项和动态恢复项分别由两部分组成,其中一部分只在反向屈服发生时起作用以描述小变形下反向屈服塑性模量降低的行为。在单调加载时,该随动硬化律可以积分为一个反双曲正弦函数,并且调控单调加载响应、棘轮变形演化和滞回环形状的参数互不耦合。基于该随动硬化律,在次弹性大变形框架下建立了循环本构模型,并考察了其对棘轮变形和应力应变滞回环的预测能力。

关键词：循环本构模型棘轮效应滞回环大变形对数应力率

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增强六手臂缺失支柱手性拉胀超材料力学性能理论研究

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力学学报 2022年第10期54卷 2733-2746,I0002页

作者：朱一林江松辉于超西南石油大学土木工程与测绘学院工程安全与防护研究院成都610500 西南交通大学力学与航空航天学院应用力学与结构安全四川省重点实验室成都610031

前期研究工作中,基于有限元分析,作者发展了一种在大变形范围内具有可调恒定负泊松比的新型增强六手臂缺失支柱手性拉胀超材料.为了揭示微观结构-力学性能关系,并进一步指导超材料目标参数设计,本文在小变形框架下基于能量法建立了表征... 详细信息

前期研究工作中,基于有限元分析,作者发展了一种在大变形范围内具有可调恒定负泊松比的新型增强六手臂缺失支柱手性拉胀超材料.为了揭示微观结构-力学性能关系,并进一步指导超材料目标参数设计,本文在小变形框架下基于能量法建立了表征该拉胀材料等效泊松比和弹性模量的理论模型.增强六手臂缺失支柱手性拉胀材料由“Z”型手臂元件组成.“Z”型手臂可以被假设为两端简支的欧拉-伯努利梁.因此,本文首先推导了两端受集中力和力偶的任意形状欧拉-伯努利梁的应变能.然后,考虑平衡条件和变形协调条件进一步给出了材料等效泊松比和弹性模量的理论表达式.研究表明只有“Z”型梁的内外手臂比为2:1时,理论表达式才有简洁的形式.为了更好地利用所推导的理论表达,基于理论推导,本文开发了MATLAT图形用户界面(GUI).在GUI中输入可描述该超材料几何形状的独立几何参数,即可直接获取其等效泊松比和弹性模量.最后,基于理论结果,系统讨论了超材料微结构几何参数对其等效力学性能的影响,并将理论解与有限元计算结果进行了对比.结果表明,可以通过调控微结构几何参数获取大范围的目标力学性能.

关键词：拉胀超材料缺失支柱手性结构负泊松比图形用户界面

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来华学生课外社交投入与汉语语用能力的社会网络分析

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现代外语 2024年第4期47卷 528-539页

作者：李茨婷朱逸琳上海外国语大学

本研究采用汉语请求口语语篇补全任务、社会网络问卷、回溯性口头报告和半结构化访谈,从社会网络分析视角探讨3名来华国际学生课外社交投入与其汉语语用能力之间的联动机制。结果发现:1)网络平衡型和稀疏型学习者社交投入程度较高,汉语... 详细信息

本研究采用汉语请求口语语篇补全任务、社会网络问卷、回溯性口头报告和半结构化访谈,从社会网络分析视角探讨3名来华国际学生课外社交投入与其汉语语用能力之间的联动机制。结果发现:1)网络平衡型和稀疏型学习者社交投入程度较高,汉语语用能力较强;2)网络单一密集型学习者社交投入程度较低,汉语语用能力较弱;3)作为社会网络分析的重要维度,中心度对社会投入和语用能力存在重要影响。本研究揭示了课外社会网络对来华学生汉语语用能力发展的作用,具象界定了社交投入的内涵和维度,为来华学生的二语语用能力发展提供了启示。

关键词：社交投入社会网络分析汉语语用能力来华国际学生

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