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Shaking table test study on performance and functionality of a typical telecommunication room after earthquakes

Earthquake Engineering and Engineering Vibration 2024年第2期23卷 455-474页

作者： li Bo Guo Endong Sun Guoliang Ji Shuqiang Mao Chenxi Wang Tao Han Di li xiaofei Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationHarbin 150080China Key Laboratory of Earthquake Disaster Mitigation Ministry of Emergency ManagementHarbin 150080China China Academy of Information and Communications Technology Beijing 100191China School of Architecture Engineering Binzhou UniversityBinzhou 256600China

Large numbers of basic transceiver stations,where the telecommunication room is one of the main components,comprise an important part of the telecommunication *** earthquakes,considerable economic loss from telecommunication systems is often associated with seismic damage and functional loss of the telecommunication ***,research related to this has been *** this study,shaking table tests were conducted for a full-scale typical telecommunication room,including a light-steel house and the necessary communication and power supply *** tests not only focused on the seismic damage to all the structures but also considered the functions of the communication and power supply of the *** interactions between these facilities and their effects on communication function were also *** with the damage to structures,the interruption of the power supply due to earthquakes is a weak ***,the damage indexes,together with their threshold values of different damage states for the communication and power supply equipment,were derived from the test *** results of this research can contribute to the literature gaps regarding seismic performance studies of telecommunication rooms,and can serve as a valuable reference for future research on its seismic fragility and economic losses evaluation.

关键词： telecommunication light-steel house communication equipment power supply equipment seismic performance functionality

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YWHAZ gene contributes to the radioresistance of oral squamous cell carcinoma cells

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Radiation Medicine and Protection 2024年第1期5卷 30-36页

作者： Songling Hu Cong Chen Hengheng Chen Xin Yu xiaofei li Yang Bai Chunlin Shao Department of Preventive Dentistry Shanghai Stomatological Hospital&School of StomatologyShanghai Medical CollegeFudan UniversityShanghai 200001China Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases Shanghai Medical CollegeFudan UniversityShanghai 200001China Institute of Radiation Medicine Shanghai Medical CollegeFudan UniversityShanghai 200032China

Objective:To investigate the contribution of YWHAZ gene on the radioresistance and metastasis ability of oral squamous cell carcinoma(OSCC)***:The relationship between the expression level of YWHAZ gene and the survival of head and neck squamous cell carcinoma(HNSC)patients was analyzed using Gene Expression Profiling Interactive Analysis(GEPIA)database.A radioresistance cell line(CAL-27R)was constructed by irradiating CAL-27 cells with frac-tional *** survival was measured by colony formation *** migration and invasion were detected by transwell *** formation of yH2AX foci was detected by immunofluorescence assay,The protein expressions were detected by Westemn blot *** some experiments,CAL-27R cells were effectively transferred with siRNA YWHAZ(siYWHAZ).Results:GEPIA database showed that the expression level of YWHAZ in HNSC tumors was higher than that in adjacent normal tissues,and the HNSC patients with higher level of YWHAZ had a shorter *** vitro experiments demonstrated that the expression of YWHAZ protein in CAL-27 cells was lower than HSC-3 cells(t=18.89,Pling effect,apoptosis induction,and yH2AX foci formation inCAL-27R and HSC-3 ***,siRNA YWHAZ transfection also reduced the invasion and migration abilities of the irradiated CAL 27R[t=21.09,Plicable to be a potential target for OSOC radiotherapy.

关键词： Oral squamous cells Radiation sensitivity YWHAZ gene Cell migration

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Topological pseudospin switcher:Mechanism and acoustic realization

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 46-53页

作者： Jia-He Chen Yiyin Chen Yaoqieyu Song Yongxu Xu Xinrong li Jingsong Wang Jiawei He Jiaxu Qu Zheng li xiaofei li Wenqiang lin Jiannan Chen Caixing Fu Zhi Hong Hang School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou 215006China Institute for Advanced Study Soochow UniversitySuzhou 215006China Provincial Key Lab of Thin Films Soochow UniversitySuzhou 215006China

The control of the pseudospin of sound wave has attracted increasing attention in recent *** the finite-size effect of topological acoustics,we successfully construct an H-shaped acoustic topological pseudospin switcher that sound wave energy can be easily switched through different *** interesting phenomenon of pseudospin flipping is numerically and experimentally demonstrated.A quantitative interference theory is proposed that the constructive and destructive interference of pseudospin states leads to pseudospin flipping and preserving in multiple *** verify the key parameters of the design,including the length of the passage and its interface state dispersion,and the theory can be extended to other topology acoustics and photonics ***,the tunable topological sonic crystal we use provides adjustable convenience to pseudospin switcher *** pseudospin switching behavior offers an efficient method to control the acoustic topological edge state transport,which has great potential in versatile applications,such as integrated acoustics,acoustic security,and information processing.

关键词： topological acoustics realization

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Pro-resolving lipid mediator reduces amyloid-β42–induced gene expression in human monocyte–derived microglia

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Neural Regeneration Research 2025年第3期20卷 873-886页

作者： Ying Wang Xiang Zhang Henrik Biverstål Nicolas GBazan Shuai Tan Nailin li Makiko Ohshima Marianne Schultzberg xiaofei li Department of Neurobiology Care Sciences&SocietyDivision of NeurogeriatricsKarolinska InstitutetStockholmSweden Department of Neurology Neuroscience CenterThe First Hospital of Jilin UniversityChangchunJilin ProvinceChina Department of Physiology and Pharmacology Karolinska InstitutetStockholmSweden Department of Biosciences and Nutrition Karolinska InstitutetHuddingeSweden Neuroscience Center of Excellence Louisiana State UniversityNew OrleansLAUSA Department of Medicine SolnaClinical Pharmacology GroupKarolinska University HospitalStockholmSweden

Specialized pro-resolving lipid mediators including maresin 1 mediate resolution but the levels of these are reduced in Alzheimer's disease brain, suggesting that they constitute a novel target for the treatment of Alzheimer's disease to prevent/stop inflammation and combat disease pathology. Therefore, it is important to clarify whether they counteract the expression of genes and proteins induced by amyloid-β. With this objective, we analyzed the relevance of human monocyte–derived microglia for in vitro modeling of neuroinflammation and its resolution in the context of Alzheimer's disease and investigated the pro-resolving bioactivity of maresin 1 on amyloid-β42–induced Alzheimer's disease–like inflammation. Analysis of RNA-sequencing data and secreted proteins in supernatants from the monocyte-derived microglia showed that the monocyte-derived microglia resembled Alzheimer's disease–like neuroinflammation in human brain microglia after incubation with amyloid-β42. Maresin 1 restored homeostasis by down-regulating inflammatory pathway related gene expression induced by amyloid-β42 in monocyte-derived microglia, protection of maresin 1 against the effects of amyloid-β42 is mediated by a re-balancing of inflammatory transcriptional networks in which modulation of gene transcription in the nuclear factor-kappa B pathway plays a major part. We pinpointed molecular targets that are associated with both neuroinflammation in Alzheimer's disease and therapeutic targets by maresin 1. In conclusion, monocyte-derived microglia represent a relevant in vitro microglial model for studies on Alzheimer's disease-like inflammation and drug response for individual patients. Maresin 1 ameliorates amyloid-β42–induced changes in several genes of importance in Alzheimer's disease, highlighting its potential as a therapeutic target for Alzheimer's disease.

关键词： Alzheimer's disease amyloid-β maresin microglia monocyte neuroinflammation resolution RNA-sequencing specialized pro-resolving lipid mediator

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Comparison of isotope-based linear and Bayesian mixing models in determining moisture recycling ratio

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Journal of Arid Land 2024年第6期16卷 739-751页

作者： XIAO Yanqiong WANG liwei WANG Shengjie Kei YOSHIMURA SHI Yudong li xiaofei Athanassios A ARGIRIOU ZHANG Mingjun Key Laboratory of Resource Environment and Sustainable Development of Oasis of Gansu Province College of Geography and Environmental ScienceNorthwest Normal UniversityLanzhou 730070China Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou 730000China Atmosphere and Ocean Research Institute University of TokyoKashiwa 277-8568Japan School of Environmental Science and Engineering Shaanxi University of Science and TechnologyXi'an 710021China Laboratory of Atmospheric Physics Department of PhysicsUniversity of PatrasPatras GR-26500Greece

Stable water isotopes are natural tracers quantifying the contribution of moisture recycling to local precipitation,i.e.,the moisture recycling ratio,but various isotope-based models usually lead to different results,which affects the accuracy of local moisture *** this study,a total of 18 stations from four typical areas in China were selected to compare the performance of isotope-based linear and Bayesian mixing models and to determine local moisture recycling *** the three vapor sources including advection,transpiration,and surface evaporation,the advection vapor usually played a dominant role,and the contribution of surface evaporation was less than that of *** the abnormal values were ignored,the arithmetic averages of differences between isotope-based linear and the Bayesian mixing models were 0.9%for transpiration,0.2%for surface evaporation,and–1.1%for advection,respectively,and the medians were 0.5%,0.2%,and–0.8%,*** importance of transpiration was slightly less for most cases when the Bayesian mixing model was applied,and the contribution of advection was relatively *** Bayesian mixing model was found to perform better in determining an efficient solution since linear model sometimes resulted in negative contribution *** test with two isotope scenarios indicated that the Bayesian model had a relatively low sensitivity to the changes in isotope input,and it was important to accurately estimate the isotopes in precipitation ***,the Bayesian mixing model should be recommended instead of a linear *** findings are useful for understanding the performance of isotope-based linear and Bayesian mixing models under various climate backgrounds.

关键词： moisture recycling stable water isotope linear mixing model Bayesian mixing model China

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茶室幻景——莱凯厅中国版画研究

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美术 2024年第7期 106-115页

作者：李啸非中国艺术研究院美术研究所

本文的讨论对象是奥地利格拉兹宫殿博物馆莱凯厅中的28幅中国版画。这些制造技术与视觉效果均十分出色的木刻版画,由7个主题构成,并与清初社会流行的图像密切相关。此外,清初宫廷艺术中与莱凯厅版画类似的阴影、体积表现,在欧洲传教士... 详细信息

本文的讨论对象是奥地利格拉兹宫殿博物馆莱凯厅中的28幅中国版画。这些制造技术与视觉效果均十分出色的木刻版画,由7个主题构成,并与清初社会流行的图像密切相关。此外,清初宫廷艺术中与莱凯厅版画类似的阴影、体积表现,在欧洲传教士传入的铜版画、绘画和建筑装饰中均可得见。莱凯厅版画很可能制作于18世纪上半叶的苏州,为了迎合当时的消费者,刻意强调了祈求吉祥、彰显文人素养的方面。随着全球贸易路线的发展,18世纪的欧洲迎来了思想、技术和物质频繁交流的时代,“中国风”成为当时的流行元素,中国版画所具有的物质性和视觉性特征,也包含在形成“中国风”的多元物质形式之中。

关键词：莱凯厅苏州版中国风视觉性

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以面带点:政策试点中地方政府政绩互补的实现机制——以M县宅基地三权分置改革试点为观察对象

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公共管理学报 2024年第3期21卷 124-136,174页

作者：李晓飞崔月中南大学公共管理学院长沙410075

政策试点何以在结果不确定性与地方政府政绩刚性之间的张力中持续运作?采用内容分析法、参与式观察法和深度访谈法,对中部地区M县宅基地三权分置改革试点进行持续追踪发现,随着试点推进,利益分立的县乡政府因政绩驱动弱化产生利益博弈,... 详细信息

政策试点何以在结果不确定性与地方政府政绩刚性之间的张力中持续运作?采用内容分析法、参与式观察法和深度访谈法,对中部地区M县宅基地三权分置改革试点进行持续追踪发现,随着试点推进,利益分立的县乡政府因政绩驱动弱化产生利益博弈,政绩逆差在投入与产出的失衡中逐渐显现。为规避可能由此引致的试点失败风险,县乡政府借助内生于科层体制的弹性调适空间对试点运行轨迹予以适时调整,通过“软硬兼施”的互动方式搭建放大试点效果与消除试点风险的“任务面”以互相交换政绩,由此形成政绩共营的组织关系,在实现政绩互补的基础上推动试点持续运作,最终成功兼顾了获取满意政绩与维持试点稳定运行双重目标。地方政府通过以面带点实现政绩互补进而为试点空间增能的行为逻辑,为洞悉中国情境下政策试点可持续运作提供了新的学理观照。

关键词：政策试点以面带点政绩逆差政绩交换政绩互补

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德国电力系统转型对我国新能源发展运行的启示

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电网技术 2024年第7期48卷 2884-2894,I0074页

作者：梁志峰礼晓飞郭琳润张金平清华大学电机工程与应用电子技术系北京市海淀区100084 国家电网有限公司国家电力调度控制中心北京市西城区10003l 不详

德国能源转型起步早,2022年可再生能源装机容量占总装机容量之比达到了55%,在全世界处于领先地位。德国能源转型主要依靠发展新能源,德国能源转型过程中,其电力系统运行方式、电力市场交易和管理模式方面对我国新能源发展具有重要的借... 详细信息

德国能源转型起步早,2022年可再生能源装机容量占总装机容量之比达到了55%,在全世界处于领先地位。德国能源转型主要依靠发展新能源,德国能源转型过程中,其电力系统运行方式、电力市场交易和管理模式方面对我国新能源发展具有重要的借鉴意义。首先从管理、运行和基础设施3方面梳理德国电力系统发展的情况及主要特点;然后归纳了德国电力市场的交易机制和新能源参与市场模式;进而在新能源并网运行管理、技术标准制定、发电功率预测及市场机制4个方面,开展中国与德国对比分析;最后结合我国电网运行的实际情况,总结出未来新能源发展与运行的启示。

关键词：电力系统转型新能源分布式光伏调度运行电力市场

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基层治理中的政策悬浮何以发生?——基于“指标干扰区”的组织学解释

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行政论坛 2024年第2期31卷 111-123页

作者：李晓飞江可盈中南大学公共管理学院湖南长沙410075

在基层治理场景中,政策悬浮是一个屡被观察到的现象,但直面此议题的学术研究却付之阙如,政策悬浮何以发生仍是未解之谜。以M镇基层治理场景为观察对象的案例研究结果表明,“指标干扰区”是促发政策悬浮的结构化和稳态化机制。基层治理... 详细信息

在基层治理场景中,政策悬浮是一个屡被观察到的现象,但直面此议题的学术研究却付之阙如,政策悬浮何以发生仍是未解之谜。以M镇基层治理场景为观察对象的案例研究结果表明,“指标干扰区”是促发政策悬浮的结构化和稳态化机制。基层治理中的指标驱动不仅引发悬浮型政权“再生产”,也导致基层政府在政策在地化践行过程中产生行为偏差,由此形成的悬空式地方转译和脱嵌式政策执行破坏了双向有效性,催生“指标干扰区”,引致在驱使基层政府主动靠拢科层的同时,既难以将国家意志中的民生信号准确传导至乡村社会,也难以使政策在地化践行充分观照民众诉求,呈现出“文本为实、品质为虚”的悬浮形态。由于“指标干扰区”具有制度化、体系化和情境化等三重组织学特征,其在促发政策悬浮之外的连带效应同样不可忽视。就此而言,“指标干扰区”这一组织学解释不仅有助于洞悉中国情境下政策悬浮的发生机制,也为加强基层治理体系和治理能力现代化建设提供了新的学理参照。

关键词：基层治理政策悬浮 “指标干扰区” 政策转译政策执行

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汽车铝合金密封工艺问题分析控制

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涂层与防护 2024年第5期45卷 36-38,39,40页

作者：李小飞奇瑞新能源汽车股份有限公司安徽芜湖241003

汽车PVC涂胶作为整车防水密封的关键工序,直接影响到整车的功能使用。而由涂胶缺陷所造成的车内渗水和车辆锈蚀,会引起客户极大抱怨甚至退车。本研究通过详解PVC涂胶过程中的常见缺陷及行之有效的控制措施,以对铝合金车身用PVC涂胶工艺... 详细信息

汽车PVC涂胶作为整车防水密封的关键工序,直接影响到整车的功能使用。而由涂胶缺陷所造成的车内渗水和车辆锈蚀,会引起客户极大抱怨甚至退车。本研究通过详解PVC涂胶过程中的常见缺陷及行之有效的控制措施,以对铝合金车身用PVC涂胶工艺作重点探讨。

关键词：汽车 PVC 密封涂胶漏水缺陷

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