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基于纤维截面模型的预应力桥墩抗震性能分析

中国安全生产科学技术 2019年第S1期15卷 146-149页

作者：许文俊杨再兴夏秀江潘彪北京城建设计发展集团股份有限公司北京100037

为研究预应力混凝土在地震作用下的能量耗散能力和滞回特性,采用基于柔度法的纤维模型分析方法建立整体现浇预应力桥墩的分析模型,在低周期循环荷载作用下,进行非线性时程分析。比较预应力钢筋混凝土桥墩与普通钢筋混凝土桥墩的滞回性能... 详细信息

为研究预应力混凝土在地震作用下的能量耗散能力和滞回特性,采用基于柔度法的纤维模型分析方法建立整体现浇预应力桥墩的分析模型,在低周期循环荷载作用下,进行非线性时程分析。比较预应力钢筋混凝土桥墩与普通钢筋混凝土桥墩的滞回性能,并在此基础上进行参数分析。结果表明:预应力桥墩的自复位能力好,残余变形小,但耗能能力较差。桥墩的残余变形和耗能能力随着预应力钢筋距截面形心距离、预应力张拉程度和配筋率的增大而减小。

关键词：纤维单元预应力桥墩滞回曲线非线性时程分析

心房颤动射频消融术中活化凝血时间维持在220~270 s的安全性

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临床心血管病杂志 2022年第6期38卷 467-471页

作者：杨再鑫石亮王彦江田颖刘兴鹏首都医科大学附属北京朝阳医院心脏中心北京100020 北京怀柔医院心内科

目的:评估心房颤动(房颤)患者导管消融术中将活化凝血时间(ACT)维持于略低于指南建议范围的安全性。方法:连续纳入行房颤射频消融术的1065例患者,单次房间隔穿刺成功后根据体重给予100 U/kg的首剂肝素,之后每15~20 min测量1次ACT,根据AC... 详细信息

目的:评估心房颤动(房颤)患者导管消融术中将活化凝血时间(ACT)维持于略低于指南建议范围的安全性。方法:连续纳入行房颤射频消融术的1065例患者,单次房间隔穿刺成功后根据体重给予100 U/kg的首剂肝素,之后每15~20 min测量1次ACT,根据ACT测值每次追加1000~2000 U肝素,ACT目标范围为220~270 s。应用冷盐水灌注消融导管进行肺静脉隔离和左房消融。结果:术中的ACT均值为(234.6±30.4)s,平均手术时间(145.8±36.7)min,术中平均肝素用量为(11092.0±2297.6)U。在并发症方面,1例(0.09%)发生了围术期症状性脑栓塞,10例(0.9%)发生了急性心脏压塞。结论:在应用单次房间隔穿刺和冷盐水灌注消融导管的条件下,房颤射频消融术中ACT均值维持于低于指南建议的范围并不增加围术期血栓栓塞事件。

关键词：心房颤动射频消融抗凝活化凝血时间并发症

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火电厂升压站保护改造分析

内蒙古电力技术 2019年第6期37卷 98-100页

作者：周景杨再欣邢立新北京华电力拓能源科技有限公司北京100035 内蒙古电力科学研究院呼和浩特010020

针对丰镇电厂继电保护装置可靠性和灵敏性较低的问题,对该厂的短引线保护、线路保护和断路器保护进行改造。在保护装置调试正确后,采用发电机零起升流短路试验方法,对改造后的二次设备进行保护相量测试分析,并解决母差保护电流相序反接... 详细信息

针对丰镇电厂继电保护装置可靠性和灵敏性较低的问题,对该厂的短引线保护、线路保护和断路器保护进行改造。在保护装置调试正确后,采用发电机零起升流短路试验方法,对改造后的二次设备进行保护相量测试分析,并解决母差保护电流相序反接问题,保障了电厂的安全稳定运行。

关键词：继电保护装置短引线保护母差保护相量测试

基于RTDS的安全稳定控制系统动模试验分析

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内蒙古电力技术 2017年第6期35卷 1-5,20页

作者：杨再欣刘锋高晨王蕴敏内蒙古电力科学研究院呼和浩特010020

基于实时数字电力仿真系统(RTDS)建立安全稳定控制系统的数字动模试验模型,研究威俊—包北500 kV变电站的临时安全稳定控制系统。依据安全稳定控制系统入网检测要求,对工程中安稳装置进行全面的功能检测,重点对跳闸判据、安稳策略、切... 详细信息

基于实时数字电力仿真系统(RTDS)建立安全稳定控制系统的数字动模试验模型,研究威俊—包北500 kV变电站的临时安全稳定控制系统。依据安全稳定控制系统入网检测要求,对工程中安稳装置进行全面的功能检测,重点对跳闸判据、安稳策略、切机原则及系统振荡进行装置校验。试验结果表明,通过RTDS搭建的动模试验平台具备安全稳定控制系统的装置级校验能力,能够真实准确地反映安稳装置的动作行为和控制特性,在线路发生低频振荡时安稳装置能够依据策略正确动作。

关键词：安全稳定控制系统动模试验 RTDS 安稳装置

贝那普利联合阿托伐他汀治疗高血压伴高血脂疗效分析

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中国循证心血管医学杂志 2018年第6期10卷 737-738页

作者：任进平李松高雅杨再鑫北京怀柔医院心内科北京101400

目的探究贝那普利联合阿托伐他汀治疗高血压伴高血脂的临床效果。方法选择北京怀柔医院于2016年3月~2017年3月收治的高血压伴高血脂患者78例,随机分为实验组与对照组(各39例),实验组采用贝那普利联合阿托伐他汀治疗,对照组仅用贝那普利... 详细信息

目的探究贝那普利联合阿托伐他汀治疗高血压伴高血脂的临床效果。方法选择北京怀柔医院于2016年3月~2017年3月收治的高血压伴高血脂患者78例,随机分为实验组与对照组(各39例),实验组采用贝那普利联合阿托伐他汀治疗,对照组仅用贝那普利治疗,观察两组患者临床疗效。结果治疗后实验组有效率显著高于对照组(P<0.05),两组收缩压(SBP)、舒张压(DBP)显著低于治疗前(P<0.05),实验组SBP、DBP显著低于对照组(P<0.05),实验组三酰甘油(TG)、总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)显著低于对照组(P<0.05),高密度脂蛋白胆固醇(HDL-C)显著高于对照组(P<0.05)。结论原发性高血压伴高血脂患者,采用贝那普利联合阿托伐他汀疗效较好,具有临床应用价值。

关键词：贝那普利阿托伐他汀高血压高血脂

Increase in the variability of terrestrial carbon uptake in response to enhanced future ENSO modulation

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 32-38页

作者： Younong Li Li Dan Jing Peng Qidong yang Fuqiang yang Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region Department of Atmospheric ScienceYunnan UniversityKunmingChina

El Niño-Southern Oscillation(ENSO)is a major driver of climate change in middle and low latitudes and thus strongly influences the terrestrial carbon cycle through land-air *** the ENSO modulation and carbon flux variability are projected to increase in the future,but their connection still needs further *** investigate the impact of future ENSO modulation on carbon flux variability,this study used 10 CMIP6 earth system models to analyze ENSO modulation and carbon flux variability in middle and low latitudes,and their relationship,under different scenarios simulated by CMIP6 *** results show a high consistency in the simulations,with both ENSO modulation and carbon flux variability showing an increasing trend in the *** higher the emissions scenario,especially SSP5-8.5 compared to SSP2-4.5,the greater the increase in *** flux variability in the middle and low latitudes under SSP2-4.5 increases by 30.9%compared to historical levels during 1951-2000,while under SSP5-8.5 it increases by 58.2%.Further analysis suggests that ENSO influences mid-and low-latitude carbon flux variability primarily through *** occurrence may potentially be attributed to the increased responsiveness of gross primary productivity towards regional temperature fluctuations,combined with the intensified influence of ENSO on land surface temperatures.

关键词： Carbon variability ENSO modulation CMIP6 models

High-temperature-tolerant flexible supercapacitors: Gel polymer electrolytes and electrode materials

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Journal of Energy Chemistry 2025年第1期100卷 426-457页

作者： Chong Peng Xinyi Huang Mingwei Zhao Shuling Liao Quanhong yang Nianjun yang Siyu Yu School of Chemistry & Chemical Engineering Southwest University Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy Storage School of Chemical Engineering and Technology and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Department of Chemistry & IMO-IMOMEC Hasselt University

The development of flexible supercapacitors(FSCs) capable of operating at high temperatures is crucial for expanding the application areas and operating conditions of supercapacitors. Gel polymer electrolytes and electrode materials stand as two key components that significantly impact the efficacy of hightemperature-tolerant FSCs(HT-FSCs). They should not only exhibit high electrochemical performance and excellent flexibility, but also withstand intense thermal stress. Considerable efforts have been devoted to enhancing their thermal stability while maintaining high electrochemical and mechanical performance. In this review, the fundamentals of HT-FSCs are outlined. A comprehensive overview of state-of-the-art progress and achievements in HT-FSCs, with a focus on thermally stable gel polymer electrolytes and electrode materials is provided. Finally, challenges and future perspectives regarding HT-FSCs are discussed, alongside strategies for elevating operational temperatures and *** review offers both theoretical foundations and practical guidelines for designing and manufacturing HT-FSCs, further promoting their widespread adoption across diverse fields.

关键词： Flexible supercapacitors High-temperature tolerance Gel polymer electrolytes Electrode materials

Role of the Greenland Sea ice anomaly in the late-spring drought over Northwest China

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 1-5页

作者： yang Liu Huopo Chen Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University for Information Science and TechnologyNanjingChina

Drought across Northwest China in late spring has exerted a vital effect on the local climate and agricultural production,and has been alleviated during the past *** study explored the influence of the preceding Arctic sea ice on the May drought in Northwest China caused by the precipitation *** analysis indicated that when the Greenland Sea ice concentration is abnormally high during February to April,the dry conditions in Northwest China tend to be *** increase of sea ice in the Greenland Sea can excite a meridional circulation,which causes sea surface temperature(SST)anomalies in the North Atlantic via the sea-air interaction,manifested as significant warm SST anomalies over the south of Greenland and the subtropical North Atlantic,but negative SST anomalies over the west of the *** abnormal SST pattern maintains to May and triggers a zonal wave train from the North Atlantic through Scandinavia and Central Asia to Northwest China,leading to abnormal cyclones in Northwest ***,Northwest China experiences a more humid climate than usual.

关键词： Arctic sea ice Greenland Sea North Atlantic SST Drought Northwest China

A surface engineering strategy for the stabilization of zinc metal anodes with montmorillonite layers toward long-life rechargeable aqueous zinc ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 94-105页

作者： Wenbo Wang Ruifeng Xu Xu Zhang Peiyu Wang Bao yang Bingjun yang Juan yang Kailimai Su Pengjun Ma Yanan Deng Xianfeng Fan Wanjun Chen Key Laboratory for Electronic Materials College of Electrical Engineering Northwest Minzu University Resource Chemistry and Energy Materials Research Center State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Institute for Materials and Processes School of Engineering University of Edinburgh

Rechargeable aqueous zinc-ion batteries （AZIBs） exhibit appreciable potential in the domain of electrochemical energy ***,there are serious challenges for AZIBs,for instance zinc dendrite growth,hydrogen evolution reaction （HER）,and corrosion side ***,we propose a surface engineering modification strategy for coating the montmorillonite （MMT） layer onto the surface of the Zn anode to tackle these issues,thereby achieving high cycling stability for rechargeable *** results reveal that the MMT layer on the surface of the Zn anode is able to provide ordered zincophilic channels for zinc ions migration,facilitating the reaction kinetics of zinc *** functional theory（DFT） calculations and water contact angle （CA） tests prove that MMT@Zn anode exhibits superior adsorption capacity for Zn2+and better hydrophobicity than the bare Zn anode,thereby achieving excellent cycling ***,the MMT@Zn||MMT@Zn symmetric cell holds the stable cycling over 5600 h at 0.5 mA cm-2and 0.125 m A h cm-2,even exceeding 1800 h long cycling under harsh conditions of 5 m A cm-2and 1.25 m A h *** MMT@Zn||V2O5full cell reaches over 3000 cycles at 2 A g-1with excellent rate ***,this surface engineering modification strategy for enhancing the electrochemical performance of AZIBs represents a promising application.

关键词： Surface engineering strategy Montmorillonite layer Protection mechanism of Zn anode Cycling stability Aqueous zinc ion batteries