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分析手段辅助机车线缆寿命评估及热老化监测

电线电缆 2024年第3期67卷 31-35页

作者：胡诚成朱旭东黄颂红洪宁宁上海电缆研究所有限公司特种电缆技术国家重点实验室上海200093 中车株洲电力机车有限公司株洲412001

当前机车线缆保有量巨大,存在较多超龄或老龄的配套线缆及系统,如何更精准地评估机车线缆服役寿命是行业共性难题。文中研究不同老化温度下机车线缆绝缘层聚烯烃材料的氧化诱导温度与相对断裂伸长率保留率的关系,以及不同温度下老化过... 详细信息

当前机车线缆保有量巨大,存在较多超龄或老龄的配套线缆及系统,如何更精准地评估机车线缆服役寿命是行业共性难题。文中研究不同老化温度下机车线缆绝缘层聚烯烃材料的氧化诱导温度与相对断裂伸长率保留率的关系,以及不同温度下老化过程中傅里叶变换红外光谱(FTIR)变化趋势。结果表明,随着老化进程的深入,相对断裂伸长率保留率逐渐降低,氧化诱导温度也逐渐变小;FTIR红外光谱变化趋势为线缆寿命评估中高温点的选择提供了筛选依据。氧化诱导温度测试及FTIR红外光谱测试可作为线缆寿命评估的辅助分析手段,可为常规老化法评估线缆寿命中高温点的选取及热老化进程的监测提供有效借鉴。

关键词：氧化诱导温度傅里叶变换红外光谱线缆寿命评估线缆热老化进程

Heterobimetallic[NiCo]integration in a hydrogenase mimic for boosting light-driven hydrogen evolution in CaTiO_(3)

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Nano Research 2024年第8期17卷 6888-6894页

作者： Kang Li Juanji hong ningning Song Zhanjun Guo Minmin Liang Experimental Center of Advanced Materials School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 10081China

Light-drive hydrogen production using titanium-based perovskite is one sustainable way to reduce current reliance on fossil fuels,but its wide applications are still limited by high electron−hole recombination and sluggish surface ***,the developments for low-cost and highly efficient co-catalysts remain *** by natural[NiFe]-hydrogenase active center structure,a hydrogenase-mimic,NiCo_(2)S_(4) nanozyme was synthesized,and subsequently decorated onto the CaTiO_(3) to catalyze the hydrogen evolution reaction(HER).Among the following test,CaTiO_(3)with a 15%loading of NiCo_(2)S_(4) nanozyme exhibited the highest HER rate of 307.76μmol·g^(–1)·h^(–1),which is 60 times higher than that of the CaTiO_(3) *** results reveal that NiCo_(2)S_(4) not only significantly increased the charge separation efficiency of the photogenerated carriers,but also substantively lowered the HER activation *** studies show that NiCo_(2)S_(4) readily splits H_(2)O by forming the Ni(OH)-Co intermediate and only Ni in the bimetallic center alters the oxidation state during the HER process in a manner analogous to the[NiFe]-*** contrast to the often-expensive synthetic catalysts that rely on rare elements such as ruthenium and platinum,this study shows a promising way to develop the nature-inspired cocatalysts to enhance the photocatalysts’HER performance.

关键词： hydrogen evolution reaction hydrogenase-mimic nanozyme photocatalyst water-splitting

Enhancing flotation recovery of residual carbon from gasification waste by mixing hydrophobic powder with diesel as collector

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Particuology 2024年第6期89卷 211-217页

作者： Rui Han ningning Zhang Anning Zhou Zhen Li Jinzhou Qu hong Wang College of Chemistry and Chemical Engineering Xi’an University of Science and TechnologyXi’anShaanxi 710054China

Coal gasification fine slag(CGFS)is a solid waste containing residual carbon and ash generated during the coal gasification process,and the separation of the two components is the essential way to realize its environmental pollution reduction and resource value *** flotation is the preferred method for separating CGFS,but there is a barrier of low carbon recovery in this process due to the extensive adsorption of collector by the well-developed pores on residual *** this study,a sufficiently simple yet innovative collector,a mixture of hydrophobic powder and diesel,was proposed in an attempt to break the *** experiments with common diesel and this novel collector were performed respectively,and FTIR,XPS,and SEM-EDX were employed to analyze the collector action *** results revealed that the novel collector could significantly improve the residual carbon recovery;test results demonstrated that the novel collector could increase the hydrophobic functional group content on the fine slag surface,and the hydrophobic powders in this novel collector mainly appeared at the pore openings of the flotation *** essence of the mechanism is that the hydrophobic powders play a dual role of blocking pores and providing adsorption sites,thus facilitating the spreading of diesel on the carbon surface and promoting its *** study can provide creative ideas for the efficient disposal of coal gasification waste.

关键词： Coal gasification fine slag Carbon recovery Collector Fotation Hydrophobic powder

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煤炭码头粉尘无组织排放防治措施对比研究

水道港口 2024年第3期45卷 455-460页

作者：洪宁宁彭士涛苏宁叶寅崔继宪刘鹏程利交通运输部天津水运工程科学研究所水路交通环境保护技术交通行业重点实验室天津300456 国能(天津)港务有限责任公司天津300450

露天堆场的粉尘无组织排放一直是干散货码头大气污染防治工作的重点和难点。苫盖和湿式除尘是我国专业化煤炭码头露天堆场粉尘无组织排放的两种主流防治措施。文章以北方某煤码头为例,基于露天堆场采用苫盖和湿式除尘措施下的粉尘无组... 详细信息

露天堆场的粉尘无组织排放一直是干散货码头大气污染防治工作的重点和难点。苫盖和湿式除尘是我国专业化煤炭码头露天堆场粉尘无组织排放的两种主流防治措施。文章以北方某煤码头为例,基于露天堆场采用苫盖和湿式除尘措施下的粉尘无组织排放浓度监测数据,对两种主流粉尘防治措施的环保效益进行了对比分析。研究结果显示:采用湿式除尘措施比采用苫盖措施更适用于高周转率的专业化煤炭码头露天堆场的粉尘无组织排放的防治。

关键词：绿色港口专业化煤炭堆场粉尘防治措施环保效益对比

Evidence of aircraft activity impact on local air quality: A study in the context of uncommon airport operation

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Journal of Environmental Sciences 2023年第3期125卷 603-615页

作者： Hao Xu Kai Xiao Jun Pan Qingyan Fu Xiaodong Wei Junrui Zhou Yamei Yu Xue Hu Huarui Ren Jinping Cheng Shitao Peng ningning hong Yin Ye Ning Su Zehui He Tao Hu School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Wuhan Environmental Protection Science Academy Wuhan 430015China Shanghai Environmental Monitoring Center Shanghai 200233China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing 210044China East China Air Traffic Management Bureau CAAC Shanghai 200335China China-UK Low Carbon College Shanghai 201306China Tianjin Research Institute for Water Transport Engineering Ministry of TransportTianjin 300456China

Wuhan Tianhe International Airport (WUH) was suspended to contain the spread of COVID-19,while Shanghai hongqiao International Airport (SHA) saw a tremendousflight *** of a major international airport is extremely rare and thus represents a unique opportunity to straightforwardly observe the impact of airport emissions on local air *** this study,a series of statistical tools were applied to analyze the variations in air pollutant levels in the vicinity of WUH and *** results of bivariate polar plots show that airport SHA and WUH are a major source of nitrogen ***,NO_(2)and NO diminished by 55.8%,44.1%,76.9%,and 40.4%,33.3% and 59.4% during the COVID-19 lockdown compared to those in the same period of 2018 and 2019,under a reduction in aircraft activities by 58.6%and61.4%.The concentration of NO_(2),SO_(2)and PM_(2.5)decreased by 77.3%,8.2%,29.5%,right after the closure of airport WUH on 23 January *** average concentrations of NO,NO_(2)and NOxscatter plots at downwind of SHA after the lockdown were 78.0%,47.9%,57.4%and 62.3%,34.8%,41.8%lower than those during the same period in 2018 and ***,a significant increase in O_(3)levels by 50.0% and 25.9%at WUH and SHA was observed,*** results evidently show decreased nitrogen oxides concentrations in the airport vicinity due to reduced aircraft activities,while amplified O_(3)pollution due to a lower titration by NO under strong reduction in NOxemissions.

关键词： Aircraft emissions COVID-19 Nitrogen oxides Ozone Airport closure

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山墙疏透率对并列布置双煤棚风荷载的影响

振动与冲击 2021年第22期40卷 275-282页

作者：苏宁彭士涛洪宁宁交通运输部天津水运工程科学研究所天津300456

通过风洞试验研究了煤棚山墙疏透率对大跨度煤棚单体建筑与并列布置双煤棚整体风力系数、风荷载体型系数及极值风压系数的影响规律。研究结果表明,增加煤棚山墙疏透率有利于煤棚内外气流交换,可有效降低分离流在山墙、屋盖边缘及天窗上... 详细信息

通过风洞试验研究了煤棚山墙疏透率对大跨度煤棚单体建筑与并列布置双煤棚整体风力系数、风荷载体型系数及极值风压系数的影响规律。研究结果表明,增加煤棚山墙疏透率有利于煤棚内外气流交换,可有效降低分离流在山墙、屋盖边缘及天窗上的风吸力。与此同时,由于山墙通风,在煤棚内部形成负压使屋盖迎风面正压体型系数和极大值风压增大。并列布置煤棚改变两煤棚相邻半跨的风压分布,屋盖整体最不利合力系数不超过单煤棚在全风向的包络值,但极值风压系数向正值方向移动。结合试验结果总结了山墙疏透煤棚的分区体型系数和分区极值风压系数,供工程设计参考。

关键词：煤棚风荷载风洞试验疏透率干扰效应

基于极点配置的调谐黏滞质量阻尼器脉冲型振动响应控制

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建筑结构学报 2023年第9期44卷 115-123页

作者：苏宁彭士涛洪宁宁东北电力大学建筑工程学院吉林吉林132012 交通运输部天津水运工程科学研究所天津300456

在脉冲型随机激励(如近场地震、突发阵风等)的动力冲击作用下,结构通常因振动响应在短时间内达到最不利峰值而破坏。已有的针对脉冲型响应峰值的控制方法较少。为了更好地实现脉冲型振动响应的被动控制,以调谐黏滞质量阻尼器(TVMD)为研... 详细信息

在脉冲型随机激励(如近场地震、突发阵风等)的动力冲击作用下,结构通常因振动响应在短时间内达到最不利峰值而破坏。已有的针对脉冲型响应峰值的控制方法较少。为了更好地实现脉冲型振动响应的被动控制,以调谐黏滞质量阻尼器(TVMD)为研究对象,通过配置响应传递函数的极点,使结构脉冲响应函数衰减最快,推导得到了TVMD的稳定性最大化优化参数解析公式。通过对具有脉冲特性的近场地震响应和突发阵风响应的振动控制算例分析,将该方法与传统固定点理论得到的优化参数控制效果进行对比。结果表明:基于传递函数极点配置的TVMD脉冲型振动响应控制方法对脉冲型振动响应的峰值控制效果显著优于固定点理论的,且随惯质比变化并不显著,采用该方法可使具有脉冲特性的近场地震位移响应最不利值平均降低约50%,突发阵风最不利极值位移响应降低约40%。

关键词：振动控制脉冲响应调谐黏滞质量阻尼器极点配置稳定性最大化近场地震突发阵风

Research on Cloud Theory Assessment Method for Environmental Carrying Capacity under Port and Waterway Development

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Research on Cloud Theory Assessment Method for Environmental...

广义变式惯容动力吸振器的H_(∞)和H_(2)解析优化

作者： LI Xin LI Mingchang ZHANG Guangyu hong ningning Tianjin Research Institute of Water Transport Engineering

Multi-port and waterway region comprehensive carrying capacity assessment system has characteristic of complex nonlinearity and *** this paper,synthetic assessment method and systematic procedure for multi-region are presented based on cloud theory.A normalized membership determination method is proposed for meeting the reasonability of index membership *** presented method works well in the multi-port and waterway *** shows the method has advantages of concision,*** randomness and ambiguity of assessment indexes’ membership can be reflected in the assessment procedure,so the assessment results are practical significance,and these can provide reliable basis for the regional scientific management.

关键词： cloud theory comprehensive carrying capacity assessment nonlinear uncertainty

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振动与冲击 2023年第9期42卷 47-56页

作者：苏宁张杰洪宁宁彭士涛交通运输部天津水运工程科学研究所天津300456

为使动力吸振器(dynamic vibration absorber,DVA)在连接限制的条件下充分发挥振动控制性能,研究了可连接在主振动系统任意位置的广义变式惯容动力吸振器的参数优化及其控制效果。基于虚功原理,在广义单自由度的主振动系统上,建立了适... 详细信息

为使动力吸振器(dynamic vibration absorber,DVA)在连接限制的条件下充分发挥振动控制性能,研究了可连接在主振动系统任意位置的广义变式惯容动力吸振器的参数优化及其控制效果。基于虚功原理,在广义单自由度的主振动系统上,建立了适用于多种惯容动力吸振器的运动微分方程以及七参数通用频响函数。在此基础上,基于固定点理论推导得到了上述动力吸振器的H_(∞)优化解析解。并通过滤波理论得到了白噪声力和基础激励下的动力响应解析解,基于大量参数分析结果,拟合得到了H_(2)优化的简化计算经验公式。经高耸烟囱结构的风致振动和地震响应控制算例验证,采用提出的经验公式对随机激励下的一阶振动主导的结构进行振动控制优化设计,最优控制比误差在2%以内,具有良好的工程适用性。该文章的分析结果可为广义变式惯容动力吸振器的工程设计提供理论依据,分析流程也可为其他类型动力吸振器的振动控制优化研究提供参考。

关键词：振动控制惯容动力吸振器(DVA) 固定点理论参数优化