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Performance of Amperometric and Potentiometric Hydrogen Sensors

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Journal of Materials Science & Technology 2014年第11期30卷 1160-1165页

作者： yuejun Ouyang Xiaojian Wang gang yu Zhengwei Song xueyuan zhang State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan University Materials Science and Engineering Laboratory Huaihua University

The principle, design, construction and performance of the amperometric and potentiometric sensors for measuring the permeation rate of hydrogen through the wall of metal equipment were investigated in order to develop a new type of hydrogen sensor with high accuracy. The transient curves of hydrogen permeation under a given charging condition were employed to evaluate the performance of two types of hydrogen sensors. The relative deviation of the hydrogen concentration detected with two types of sensors under the same condition varied from 3.0% to 13%. The accuracy, response time, reproducibility, and installation were discussed and compared. Response time of the potentiometric sensor （E-sensor） was shorter than that of the amperometric sensor （I-sensor）. Both types of sensors exhibited good reproducibility. Development of I-sensor composed of a kind of proton conductor adhesives or non-fluid electrolytes which contain two functions of high electrical conductivity and a strong adhesion will be a promising prospect in order to measure hydrogen permeation at high temperature.

关键词： Hydrogen sensor Hydrogen diffusion Hydrogen embrittlement Nickel

An On-line Monitoring System for Hydrogen Distribution in the Metallic Wall Caused by Hydrogen Permeation

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Journal of Materials Science & Technology 2001年第3期17卷 346-350页

作者： gang yu Shenyang University of Technology, 110023, China xueyuan zhang and yuanlong du State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China E-mail: yugang@*** Shenyang Univ. of Technol. Shenyang 110023 China

Based on the electrochemical permeation technique and the patent by du, an intelligent elec-trochemical measurement system for determination of the hydrogen distribution in the wall of hydrogenation reactor has been developed and tested. It consists of a PC computer, a single chip unit, an I/V converter and an electrochemical hydrogen probe. The construction of the electrochemical hydrogen probe is described and the features of the measured system are given. The diffusion coefficient of 2.25CrlMo steel determined with present system was in good agree-ment with the value in the literature. Experimental results of hydrogen concentration in a wall of hydrogen charged testing autoclave made of AISI 321 stainless steel are presented. The present system can intelligently display hydrogen amount-of-substance concentration and mass fraction concentration, hydrogen concentration distribution curves in steels, permeation current density curve. An intelligent detection technique can be provided for predicting the susceptibility to hydrogen-induced cracks owing to hydrogen permeation in the wall of hydrogenation reactor in the field.

关键词： Hydrogen bonds

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断裂基因转录原理在曲线锯形态设计中的应用

包装工程 2024年第10期45卷 70-77,105页

作者：马胜奎李刚张祎颖陈元龙胡奇彬昆明理工大学昆明650504

目的为满足电动工具企业对品牌识别的需求,将生物学断裂基因转录原理应用到产品形态设计过程中以实现电动工具产品的迭代更新,加强产品的家族化特征和品牌识别性。方法分析企业目标产品族的基本形态基因,利用平面绘图软件提取早期产品... 详细信息

目的为满足电动工具企业对品牌识别的需求,将生物学断裂基因转录原理应用到产品形态设计过程中以实现电动工具产品的迭代更新,加强产品的家族化特征和品牌识别性。方法分析企业目标产品族的基本形态基因,利用平面绘图软件提取早期产品造型的轮廓线,形成该产品的形态基因图谱,基于断裂基因转录的剪接机制和电动工具迭代中形态基因筛减过程的相似之处,运用设计形态分析法和聚类分析将形态基因分为3类,即典型基因、次典型基因和一般基因,其中典型基因和次典型基因组合形成产品基因框架体。以产品基因框架体为基础,以形状文法为推演方法,基于建立的品牌特征识别的规则约束,创造出新产品的形态基因图谱以指导产品迭代,最后通过李克特量表对新旧形态基因图谱进行评估验证。结果提出了基于断裂基因转录原理的迭代设计理论与方法,通过形状文法创造出具有家族识别特征的新形态基因图谱。结论以东达品牌曲线锯设计为例,根据李克特量表的相关统计数据显示,新形态基因图谱优于旧形态基因图谱,验证了该方法的可行性。

关键词：工业设计形态设计断裂基因产品基因形状文法曲线锯

Relationship between the Brittlement Susceptibility and H Permeation Current for UNS G11180 Steel in 5% NaCl Solution with H_2S

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Journal of Materials Science & Technology 1998年第6期14卷 555-558页

作者： xueyuan zhang and yuanlong du(State Key Lab. for Corrosion and Protection, Institute of Corrosion and Protection of Metals,Chinese Academy of Sciences, Shenyang 110015, China) State Key Lab. for Corrosion and Protection Institute of Corrosion and Protection of Metals Chinese Academy of Sciences Shenyang 110015 China

Sulfide stress corrosion cracking (SSCC) behaviour of UNS G11180 steel in 5% NaCl solution with H2S was studied by slow strain rate tensile test (SSRT), SEM and electrochemical hydro gen permeation technique. The results reveal different cracking mechanism and H permeation current (IH) through UNS G11180 steel plate in different concentration of H2S solution. The susceptibility to SSCC of UNS G11180 Steel in 5% NaCl solution with H2S was evaluated by the permeation current(IH, μA), which depends on the concentration (c×10-6) of H2S by the equation:IH = 8.525 ×c0.7249. lt is proved that the electrochemical H permeation method is a practical way to assess the susceptibility to SSCC.

关键词： UNS NaCl Solution with H2S Relationship between the Brittlement Susceptibility and H Permeation Current for UNS G11180 Steel in 5

基于NS-3网络模拟器的MPQUIC协议仿真研究

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南京大学学报（自然科学版） 2024年第4期60卷 625-632页

作者：聂金全樊越华吴骏逸章志明雷刚曹远龙江西师范大学软件学院南昌330022 江西省区块链数据安全与治理工程研究中心南昌330022

随着5G移动视频应用加速落地以及国内视频流需求的迅速激增,迫切需要一种新的数据传输协议来提供可靠的安全性,以保障上层应用处理更多的接入连接以及满足更低的延时需求.多路径QUIC协议(Multipath Quick UDP Internet Connection,MPQU... 详细信息

随着5G移动视频应用加速落地以及国内视频流需求的迅速激增,迫切需要一种新的数据传输协议来提供可靠的安全性,以保障上层应用处理更多的接入连接以及满足更低的延时需求.多路径QUIC协议(Multipath Quick UDP Internet Connection,MPQUIC)具有拟合多条链路带宽资源、强大连接的容错能力和高可靠性等优点,被认为将在未来移动互联网数据传输中发挥重要的作用.然而,目前国内外研究人员对于MPQUIC协议的相关研究正处于初步阶段,该协议还没有一个普适性的、开源的仿真平台.因此,借助全球网络仿真领域应用最广的NS-3网络模拟器搭建了MPQUIC仿真平台(ns3-mpquic),为相关学者提供研究MPQUIC协议的开源、免费、普适的基础平台,为全球专家学者对MPQUIC协议的模拟部署和优化提供助力.

关键词：多路径传输 MPQUIC NS-3网络模拟器仿真平台

Research on the impact of high-temperature aging on the thermal safety of lithium-ion batteries

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Journal of Energy Chemistry 2023年第12期87卷 378-389,I0010页

作者： Guangxu zhang Xuezhe Wei Siqi Chen gang Wei Jiangong Zhu xueyuan Wang Guangshuai Han Haifeng Dai Clean Energy Automotive Engineering Center Tongji UniversityShanghai 201804China School of Automotive Studies Tongji UniversityShanghai 201804China Institute for Advanced Study Tongji UniversityShanghai 200092China Shanghai AI NEV Innovative Platform Co. Ltd.Shanghai 201804China

Understanding the thermal safety evolution of lithium-ion batteries during high-temperature usage conditions bears significant implications for enhancing the safety management of aging *** work investigates the thermal safety evolution mechanism of lithium-ion batteries during high-temperature *** arise in the thermal safety evolution and degradation mechanisms for lithium-ion batteries undergoing cyclic aging and calendar *** multi-angle characterization analysis,the intricate mechanism governing the thermal safety evolution of lithium-ion batteries during high-temperature aging is ***,lithium plating serves as the pivotal factor contributing to the reduction in the self-heating initial ***,the crystal structure of the cathode induced by the dissolution of transition metals and the reductive gas generated during aging attacking the crystal structure of the cathode lead to a decrease in thermal runaway triggering ***,the loss of active materials and active lithium during aging contributes to a decline in both the maximum temperature and the maximum temperature rise rate,ultimately indicating a decrease in the thermal hazards of aging batteries.

关键词： Lithium-ion batteries High-temperature aging Thermal safety Degradation Lithium plating

Study of in-situ Electrochemical SSCC/HE Susceptibility Probe

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Journal of Materials Science & Technology 2001年第6期17卷 670-672页

作者： xueyuan zhang, Enhou HAN and yuanlong du State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China [Manuscript received August 30, 2000, in revised for Chinese Acad Sci Inst Met Res State Key Lab Corros & Protect Shenyang 110016 Peoples R China

An in-situ probe technique with an outward attached type of electrochemical sensor for inspection and evaluation of the susceptibility to sulfide stress corrosion cracking (SSCC) and hydrogen embrittlement (HE) of pipeline/vessel was developed. The relationship between SSCC/HE susceptibility of steel UNS G10180 and UNS G11190 and I-H was determined by the measurement of the stable hydrogen permeation rate (I-H) and the study of SSCC/HE susceptibility of the above two steels in TM-01-77 solution. Environmental sensitive cracking (ESC) of UNS G10180 and UNS G11190 steels can be inspected, evaluated, judged by the combination with the microcomputer system (MCS)/periphery attachment and the designed software. The results give an important insurance for safety control of the pressurized pipeline/vessel operated in the environment with H2S.

关键词： SSCC HE

Preliminary results of ice radar investigation along the traverse between Zhongshan and Dome A in East Antarctic ice sheet:Ice thickness and subglacial topography

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Chinese Science Bulletin 2010年第24期55卷 2715-2722页

作者： CUI XiangBin SUN Bo TIAN gang TANG xueyuan zhang XiangPei JIANG yunyun GUO JingXue LI Xin Polar Research Institute of China Shanghai 200136 China Department of Earth Science Zhejiang University Hangzhou 310027 China

during the 24th Chinese National Antarctic Research Expedition(CHINARE 24,2007/08),a ground-based ice radar was used to survey ice thickness and subglacial topography along the 1170 km traverse between Zhongshan and Dome A in East Antarctic ice sheet(EAIS).Ice-bedrock interface was detected along 82%of the traverse and data was collected at a horizontal resolution of duce curves of ice thickness distribution and subglacial topography along the *** results indicate that,along the traverse,the average ice thickness is 2037 m,smaller than the average ice thickness in EAIS;the thickest ice is at 730 km,and the thinnest ice(891 m)is at the edge of the ice sheet,but the slightly larger ice thickness(1078 m) in inland appears at 1020 km;the average subglacial topography elevation is 728 m,greatly larger than the average value in EAIS, and the largest elevation reaches up to 2650 m at 1034 *** lowest terrain is located at 765 *** further inland of 900?1170 km,the subglacial topography is relatively high due to the existence of the Gamburtsev Subglacial Mountains in the ***,the influence of subglacial topography on ice surface is not significant,except at 900 km where great rise of subglacial topography causes evident uplift of ice *** ice-bedrock interface was detected,the frequent and strong change of ice thickness and subglacial topography in small-scale means large bedrock roughness along the traverse,and is considered as the result of the integrated influence of ice flow,basal environments and *** segment where bedrock was not detected has very large ice *** strong ice flow there also makes internal structure more complicated and induces serious attenuation of radar signals.

关键词：冰下地形东南极洲雷达测量冰厚度冰穹遍历冰盖中山

Ice radar investigation at Dome A, East Antarctica:Ice thickness and subglacial topography

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Chinese Science Bulletin 2010年第4期55卷 425-431页

作者： CUI XiangBin SUN Bo TIAN gang TANG xueyuan zhang XiangPei JIANG yunyun GUO JingXue LI Xin Department of Earth Science Zhejiang University Hangzhou 310027 China Polar Research Institute of China Shanghai 200136 China

Dome A, located in the central East Antarctic ice sheet (EAIS), is the highest summit of the Antarctic ice sheet. From ice-sheet evolution modeling results, Dome A is likely to preserve over one million years of the Earth's paleo-climatic and -environmental records, and considered an ideal deep ice core drilling site. Ice thickness and subglacial topography are critical factors for ice-sheet models to determine the timescale and location of a deep ice core. during the 21st and 24th Chinese National Antarctic Research Expedition (CHINARE 21, 2004/05; CHINARE 24, 2007/08), ground-based ice radar systems were used to a three-dimensional investigation in the central 30 km×30 km region at Dome A. The successfully obtained high resolution and accuracy data of ice thickness and subglacial topography were then interpolated into the ice thickness distribution and subglacial topography digital elevation model (DEM) with a regular grid resolution of 140.5 m×140.5 m. The results of the ice radar investigation indicate that the average ice thickness in the Dome A central 30 km×30 km region is 2233 m, with a minimal ice thickness of 1618 m and a maximal ice thickness of 3139 m at Kunlun Station. The subglacial topography is relatively sharp, with an elevation range of 949-2445 m. The typical, clear mountain glaciation morphology is likely to reflect the early evolution of the Antarctic ice sheet. Based on the ice thickness distribution and subglacial topography characteristics, the location of Kunlun Station was suggested to carry out the first high-resolution, long time-scale deep ice core drilling. However, the internal structure and basal environments at Kunlun Station still need further research to determine.

关键词：冰下地形东南极洲冰穹雷达厚度冰层