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Observation of the failure mechanism in Ag_(10)Ge_(15)Te_(75)-based memristor induced by ion transport

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Nano Research 2024年第9期17卷 8431-8437页

作者： yuwei xiong Kuibo Yin Weiwei Sun Jingcang Li Shangyang Shang Lei Xin Qiyun Wu Xiaoran Gong Yidong Xia Litao Sun SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of EducationSoutheast UniversityNanjing 210096China College of Engineering and Applied Sciences Nanjing UniversityNanjing 210093China

The solid-electrolyte-based memristors have attracted tremendous attention for the next-generation nonvolatile memory for both logic and neuromorphic ***,they encounter variability performance challenges which originated from the random ionic transport and conductive filaments ***,the electrochemical metallized mechanism associated with ion transport has been ***,the failure mechanism caused by ion transport during cycles is rarely ***,the five stages of failure in the Ag/Ag_(10)Ge_(15)Te_(75)/W memristor are elucidated through ex-situ current-voltage measurements combined with in-situ transmission electron microscopy *** investigation reveals that the migration and enrichment of Ag ions result in the precipitation of Ag_(2)*** formation of Ag_(2)Te hinders the device's ability to maintain its bipolar characteristics and also decreases the resistance value of the high resistance state,thereby reducing the device's switching *** promising results provide important guidance for the future design of structures and the manipulation of ion transport for high-performance memristors.

关键词： Ag10Ge15Te75 in-situ transmission electron microscopy(TEM) failure mechanism

通过激光/分散系耦合增强氧化石墨烯的还原效果:实现大规模、低缺陷的石墨烯用于无折痕散热膜在先进柔性电子器件中的应用

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Science Bulletin 2024年第11期69卷 1716-1727页

作者：孙佳惟熊雨薇贾海洋韩龙祥叶雯孙立涛 College of Electronic and Information Engineering Suzhou University of Science and TechnologySuzhou 215009China SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of EducationSoutheast UniversityNanjing 210096China School of Physics and New Energy Xuzhou University of TechnologyXuzhou 221018China Jiangsu Industrial Intelligent and Low-carbon Technology Engineering Center Suzhou 215000China Suzhou Key Laboratory of Intelligent Low-carbon Technology Application Suzhou 215000China College of Chemistry and Life Sciences Suzhou University of Science and TechnologySuzhou 215009China

The advancement of flexible electronics demands improved components,necessitating heat dissipation membranes(HDMs)to exhibit high thermal conductivity while maintaining structural integrity and performance stability even after extensive ***,we have devised a laser-modulated reduction technique for graphene oxide(GO),enabling the fabrication of high-quality,large-scale,lowdefect graphene,which yields high-performance HDMs after orderly *** work underscores the crucial role of the laser wavelength and dispersion liquid's coupling intensity in influencing the morphology and properties of *** coupling effect and energy conversion are realized when a laser of 1064 nm wavelength irradiates a triethylene glycol(TEG)/N,N-Dimethylformamide(DMF)*** unique synergy generates high transient energy,which facilitates the deprotonation process and ensures a swift,comprehensive GO *** contrast to conventional water-based laser reduction methods,the accelerated reaction magnifies the size of the graphene sheets by mitigating the ablation *** membrane construction with an ordered structure,the corresponding membrane exhibits a high thermal conductivity of 1632 W m^(-1)K^(-1),requiring only~1/10 of the total preparation time required by other reported ***,the resulting HDM demonstrates superior resilience against creasing and folding,maintaining excellent smoothness and negligible reduction in thermal conductivity after violent *** combination of exceptional flexibility and thermal conductivity in HDMs paves the way for long-term practical use in the flexible electronics industry.

关键词： Laser-irradiation technology System coupling Graphene-based Heat dissipation membranes Crease-free

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基于政府补贴的绿色供应链成员销售模式选择

运筹与模糊学 2024年第4期14卷 191-200页

作者：田天赐熊雨薇上海理工大学管理学院上海

随着绿色供应链的发展,选择合适的销售模式是制造商和电商平台面临的一个重要问题。因此,本文构建了一个斯塔克伯格博弈模型,考虑政府补贴下制造商投入绿色技术生产产品,电商平台对产品开展营销活动,研究了政府补贴和平台佣金率对绿色... 详细信息

随着绿色供应链的发展,选择合适的销售模式是制造商和电商平台面临的一个重要问题。因此,本文构建了一个斯塔克伯格博弈模型,考虑政府补贴下制造商投入绿色技术生产产品,电商平台对产品开展营销活动,研究了政府补贴和平台佣金率对绿色供应链成员在不同销售模式下的决策影响,以及何种销售模式更有利于提升社会福利的问题。研究发现:1)无论何种销售模式,政府补贴力度越大,越能够提升制造商的绿色技术投入和平台的营销努力;2)政府补贴环境下,当平台佣金率较小时,制造商(平台)在代销(转售)模式下的最优利润高于转售(代销)模式,当佣金率适中时,制造商和平台在代销模式下的最优利润均高于转售模式,实现绿色供应链成员双赢;3)当佣金率较低(较高)且政府补贴比例适中时,相较于转售(代销)模式,代销(转售)模式更能够提升社会福利。

关键词：绿色供应链销售模式政府补贴社会福利

Combining in-situ TEM observations and theoretical calculation for revealing the thermal stability of CeO_(2) nanoflowers

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Nano Research 2022年第2期15卷 1319-1326页

作者： Mingyun Zhu Kuibo Yin Yifeng Wen Shugui Song yuwei xiong Yunqian Dai Litao Sun SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of EducationSoutheast UniversityNanjing 210096China School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China

The thermal stability of Ce_(2) nanomaterials can directly impact both the uniformity of the supported catalysts and the catalytic behavior of Ce_(2) ***,knowledge about the thermal stability of Ce_(2) is still ***,we conduct in-situ transmission electron microscopy experiments and theoretical calculations to elucidate the thermal stability of Ce_(2) nanomaterials under different environments.A sinter(700℃)are observed within Ce_(2) nanoflowers under O_(2).The sinter firstly occurs among the nanoflowers’monomers and then the sintered nanoparticles structurally decompose to tiny nanoparticles from the strain *** a vacuum environment,the Ce_(2) nanoflowers firstly undergo a transition from cubic fluorite Ce_(2) to hexagonal Ce_(2)O_(3),accompanied by the oxygen *** Ce_(2)O_(3) nanoparticles further atomically sublimate from the edges to the center under high *** calculation results reveal a considerably lower energy barrier for the structural decomposition under O_(2) and for the sublimation under *** work provides a perspective on the structural design and performance optimization of Ce_(2)-based catalysts.

关键词： CeO_(2) in-situ transmission electron microscopy structural evolution thermal stability theoretical calculation

基于三维地质建模的准噶尔盆地断层稳定性研究

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测井技术 2024年第4期48卷 509-519页

作者：熊雨薇张艳马金钰李哲雷成孙文铁长江大学石油工程学院油气钻完井技术国家工程研究中心湖北武汉430100 油气资源与工程全国重点实验室中国石油大学(北京) 北京102249 中国石油西部钻探工程有限公司地质研究院新疆克拉玛依834000 渤海钻探工程有限公司管具与井控技术服务分公司天津300000 辽宁石油化工大学石油天然气工程学院辽宁抚顺113001

地应力的分布特征及断层稳定性对复杂区域的水平井井位部署、钻井方位及水力压裂设计等方面至关重要。准噶尔盆地构造运动剧烈,地层特征较为复杂,需厘清地应力变化规律,判别断层稳定性,把控钻井风险,以提高钻井作业效率。该文以区域地... 详细信息

地应力的分布特征及断层稳定性对复杂区域的水平井井位部署、钻井方位及水力压裂设计等方面至关重要。准噶尔盆地构造运动剧烈,地层特征较为复杂,需厘清地应力变化规律,判别断层稳定性,把控钻井风险,以提高钻井作业效率。该文以区域地质构造、地震等资料为基础,优选地应力计算模型,进行三维地质力学建模。通过模型计算,得出区域地应力大小和特征,判断区域特征为走滑断层控制过渡到正断层控制;基于模拟结果对三段重点层位进行研究,分析得到断层对地应力变化规律的影响。利用Coulomb破坏函数对研究区域内5条主干断层进行力学判别,分析得到F1和F3断层处于稳定状态,F2、F4和F5断层处于不稳定状态,这一判断结果有助于实现钻井风险的及时预警。该研究通过系统的地质力学建模和断层稳定性分析,为复杂区域相关工程研究提供了理论支持,可以有效地提高钻井作业效率。

关键词：测井解释地应力三维地质建模断层稳定性模型计算准噶尔盆地

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塔北地区碳酸盐岩地层超压形成机制研究

测井技术 2024年第4期48卷 527-536页

作者：马金钰张艳熊雨薇徐声驰夏国清长江大学油气钻完井技术国家工程研究中心湖北武汉430100 中国石油大学(北京)油气资源与工程全国重点实验室北京102249 油气钻采工程湖北省重点实验室湖北武汉430100 中国石油集团西部钻探地质研究院录井工程分公司新疆克拉玛依834000

塔北地区古生界碳酸盐岩地层异常压力普遍发育,地层存在多套压力系统。为提高塔北地区碳酸盐岩地层压力预测的精度,研究了该地区地层异常压力的成因。通过对塔北地区实测压力、测井曲线、声波速度—密度交会图、声波速度—垂向有效应力... 详细信息

塔北地区古生界碳酸盐岩地层异常压力普遍发育,地层存在多套压力系统。为提高塔北地区碳酸盐岩地层压力预测的精度,研究了该地区地层异常压力的成因。通过对塔北地区实测压力、测井曲线、声波速度—密度交会图、声波速度—垂向有效应力交会图、气测数据及地震资料的综合分析,表明深层碳酸盐岩地层纵向上发育常压、弱超压和超压系统。弱超压系统压力系数普遍大于1.10,部分超压点压力系数大于1.50,超压主控因素为构造挤压作用和生烃作用。选取引入超压成因机制的Bowers法对深层碳酸盐岩地层压力进行预测,与实测数据相对比,该方法预测的地层压力相对误差低于5.000%,预测精度较高,满足现场工程需求,对塔北及相似地区深层、超深层碳酸盐岩超压成因及压力预测研究具有指导意义。

关键词：压力系数成因机制地层压力 Bowers法塔北地区

基于耳蜗基底膜仿生原理的液压脉动衰减器滤波特性研究

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机械工程学报 2016年第4期52卷 171-177页

作者：贺尚红熊宇维王文长沙理工大学工程车辆安全性设计与可靠性技术湖南省重点实验室长沙410004 湖南工业职业技术学院机械工程系长沙410208

为解决液压系统中由于压力脉动引起的振动和噪声问题,从仿生学角度出发,根据人耳听觉形成过程及耳蜗基底膜的宽频振动响应特征,研究耳蜗基底膜振动的'空间-频率'特性,提出一种仿耳蜗基底膜振动特性的液压脉动抑制方法。设计一种以仿生... 详细信息

为解决液压系统中由于压力脉动引起的振动和噪声问题,从仿生学角度出发,根据人耳听觉形成过程及耳蜗基底膜的宽频振动响应特征,研究耳蜗基底膜振动的'空间-频率'特性,提出一种仿耳蜗基底膜振动特性的液压脉动抑制方法。设计一种以仿生膜片为共振体的结构紧凑灵巧的液压脉动衰减器,克服了传统液压脉动衰减器结构复杂、体积庞大的缺点。基于流固耦合原理,分析仿生膜片在压力流体中的振动特性;结合管路动态特性,建立脉动衰减器的传递矩阵模型,用插入损失对脉动衰减性能进行评价;通过脉动衰减器样机的试验检验其滤波减振性能。理论和试验结果表明该液压脉动衰减器能够有效衰减液压系统有效频率的压力脉动,并且在较宽频带内有较好的滤波效果,实现了广谱滤波。

关键词：耳蜗基底膜仿生膜片脉动衰减器液压脉动

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钢箱梁施工过程中横隔板局部稳定分析

四川建材 2015年第3期41卷 156-158页

作者：熊宇微重庆交通大学土木建筑学院重庆400074

港珠澳非通航段钢箱梁施工过程中有局部失稳现象,利用ANSYS有限元软件,采用变形量来验算结构受力和支点的高差反算支点的最大受力两种手段,找出局部失稳原因。结果表明局部横隔板应力超出屈服强度。

关键词：横隔板局部稳定强度

integrated structure for recognition of different joint motion states with the assistance of a deep learning algorithm

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Microsystems & Nanoengineering 2022年第1期8卷 317-330页

作者： Lei Wen Meng Nie Pengfan Chen Yu-na Zhao Jingcheng Shen Chongqing Wang yuwei xiong Kuibo Yin Litao Sun SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of EducationSchool of Electronic Science&EngineeringSoutheast UniversityNanjing 210096P.R.China

Accurate motion feature extraction and recognition provide critical information for many scientific ***,a new paradigm for a wearable seamless multimode sensor with the ability to decouple pressure and strain stimuli and recognize the different joint motion states is *** wearable sensor is integrated into a unique seamless structure consisting of two main parts(a resistive component and a capacitive component)to decouple the different stimuli by an independent resistance-capacitance sensing *** sensor exhibits both high strain sensitivity(GF=7.62,0-140%strain)under the resistance mechanism and high linear pressure sensitivity(S=3.4 kPa^(-1),0-14 kPa)under the capacitive *** sensor can differentiate the motion characteristics of the positions and states of different joints with precise recognition(97.13%)with the assistance of machine learning *** unique integrated seamless structure is achieved by developing a layer-bylayer casting process that is suitable for large-scale *** proposed wearable seamless multimode sensor and the convenient process are expected to contribute significantly to developing essential components in various emerging research fields,including soft robotics,electronic skin,health care,and innovative sports systems applications.

关键词： motion structure wear