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Working Pressure Induced Microstructure and Stress Evolution of Sputtered ZrN Coatings

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稀有金属材料与工程 2012年第S1期41卷 429-432页

作者： Qi Zhengbing Yan Weili Hong Jinqing zhu fangping Sun Peng Wang Zhoucheng Wu Zhengtao Peng Dongliang Wu Chonghu Xiamen Univ Coll Chem & Chem Engn Xiamen 361005 Peoples R China China Natl R&D Ctr Tungsten Technol Xiamen 361005 Peoples R China

The influence of working pressure on microstructure and residual stress evolution of magnetron sputtered ZrN coatings were systemically *** and XRD results reveal that all as-deposited coatings at varying working pressure are stoichiometric ZrN with cubic NaCl structure.A decrease in working pressure results in preferred orientation evolution from(111)to(200).This evolution is driven by kinetics processes,such as adatom surface migration and competitive grain growth,rather than by *** explanation is also supported by morphology characterization as the surface and cross-section morphologies transition from tapered shape and columnar structure to round and non-columnar(equiaxed)structure.

关键词： ZrN coating working pressure preferred orientation residual stress microstructure

高温碳化养护对干硬性水泥净浆强度及微观性能的影响

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硅酸盐通报 2021年第10期40卷 3337-3344页

作者：林忠财朱芳萍王敏湖南大学土木工程学院长沙410082

碳化养护可在加快水泥制品早期强度发展的同时固定二氧化碳,因此已引起国内外学者的广泛关注,然而,高温对碳化养护进程的影响却未见报道。本文选用5个温度(20℃、100℃、120℃、140℃、160℃)对干硬性水泥净浆进行碳化养护,探究了抗压... 详细信息

碳化养护可在加快水泥制品早期强度发展的同时固定二氧化碳,因此已引起国内外学者的广泛关注,然而,高温对碳化养护进程的影响却未见报道。本文选用5个温度(20℃、100℃、120℃、140℃、160℃)对干硬性水泥净浆进行碳化养护,探究了抗压强度随碳化温度的变化规律,并结合热重分析、X-射线衍射、红外光谱及扫描电镜等方法对碳化养护后样品的微观性能进行表征。结果表明:抗压强度及碳化程度随温度的升高表现出先增加后趋于平缓的趋势,碳化温度为140℃的试件相比碳化温度为20℃的试件抗压强度增长近4倍,表明高温碳化是加速养护的有效措施,适当的高温可以蒸发部分自由水,有利于碳化反应进行。此外,高温碳化养护生成了高聚合程度的无定形硅胶和三种不同晶型的碳酸钙(CaCO3),其中文石和球霰石所占比例相比于常温碳化有所上升。

关键词：高温碳化养护干硬性水泥净浆抗压强度碳化程度矿物成分

当前电力系统配电网络中成套产品的配置设计缺陷与改进

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科学之友 2012年第4期 29-30页

作者：朱方萍宜兴市中利电气设备有限公司

文章对目前我国电力系统的高低压成套设备配置设计进行了综述和缺陷分析,并根据笔者多年的实践工作经验提出该类成套产品配置设计的改进方案。

关键词：电力系统配电网络成套产品设计缺陷与改进

氮气流量对磁控溅射ZrN纳米涂层结构及硬度的影响

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西安交通大学学报 2011年第1期45卷 137-140页

作者：黄若轩孙鹏朱芳萍祁正兵王周成厦门大学材料学院福建厦门361005 厦门大学化学化工学院福建厦门361005

利用磁控溅射方法,通过改变氮气流量制备出ZrN纳米涂层,研究了氮气流量对ZrN纳米涂层结构及硬度的影响,并采用表面轮廓仪、X射线衍射仪、扫描电镜及纳米压痕表征了ZrN纳米涂层的厚度、相结构、形貌及硬度.实验结果表明,随着氮气流量增加... 详细信息

利用磁控溅射方法,通过改变氮气流量制备出ZrN纳米涂层,研究了氮气流量对ZrN纳米涂层结构及硬度的影响,并采用表面轮廓仪、X射线衍射仪、扫描电镜及纳米压痕表征了ZrN纳米涂层的厚度、相结构、形貌及硬度.实验结果表明,随着氮气流量增加,涂层厚度减小,涂层择优取向由(111)变为(200),对应的截面形貌由柱状结构变为非柱状结构;传统的位错滑移机制不适用于ZrN纳米涂层的塑性变形,其硬度随择优取向和晶粒尺寸的增大而增加.

关键词：氮化锆纳米涂层磁控溅射取向性硬度

Few-shot incremental radar target recognition framework based on scattering-topology properties

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Chinese Journal of Aeronautics 2024年第8期37卷 246-260页

作者： Chenxuan LI Weigang zhu Bakun zhu Yonggang LI Graduate School Space Engineering UniversityBeijing 101400China Department of Electronic and Optical Engineering Space Engineering UniversityBeijing 101400China

The continuous emergence of new targets in open scenarios leads to a substantial decrease in the performance of Inverse Synthetic Aperture Radar(ISAR)recognition ***,data scarcity further exacerbates the challenge of identifying new classes of ISAR *** this paper,a few-shot incremental target recognition framework based on Scattering-Topology Properties(STPIL)is ***,STPIL extracts scattering-topology properties of ISAR targets as recognition ***,the pseudo-incremental training strategy effectively alleviates the algorithm’s forgetting of old knowledge,and improves compatibility with new ***,a feature embedding network,with few parameters,is designed based on the graph neural *** embedding network is highly adaptable to changes in data ***,STPIL fully considers the joint distribution and marginal distribution in scattering features,and uses the Brownian distance metric module to make the scattering-topology features more *** results on both the simulation dataset and the public measured data indicate that STPIL can effectively balance new classes with old classes,and has superior performance to other advanced methods in the incremental recognition of targets.

关键词： Brownian distance metric Graph neural networks Incremental learning Inverse Synthetic Aperture Radar(ISAR) Scattering

Stress-strain relationship for reactive powder concrete with recycled powder under uniaxial compression

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Frontiers of Structural and Civil Engineering 2024年第7期18卷 1015-1027页

作者： Peng zhu Yunming zhu Wenjun QU Liyu XIE College of Civil Engineering Tongji UniversityShanghai 200092China Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education Tongji UniversityShanghai 200092China

The recycled powder(RP)from construction wastes can be used to partially replace cement in the preparation of reactive powder *** this paper,reactive powder concrete mixtures with RP partially replacing cement,and natural sand instead of quartz,are *** curing is used,instead of steam curing that is normally requested by standard for reactive powder *** influences of RP replacement ratio(0%,10%,20%,30%),silica fume proportion(10%,15%,20%),and steel fiber proportion(0%,1%,2%)are *** effects of RP,silica fume,and steel fiber proportion on compressive strength,elastic modulus,and relative absorption energy are analyzed,and theoretical models for compressive strength,elastic modulus,and relative absorption energy are established.A constitutive model for the uniaxial compressive stress-strain relationship of reactive powder concrete with RP is *** the increase of RP replacement ratio from 0% to 30%,the compressive strength decreases by 42% and elastic modulus decreases by 24%.

关键词： recycled powder reactive powder concrete elastic modulus relative absorbed energy stress-strain relationship

Carbon Emission Effects Driven by Evolution of Chinese Dietary Structure from 1987 to 2020

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Chinese Geographical Science 2024年第1期34卷 181-194页

作者： zhu Yuanyuan ZHANG Yan zhu Xiaohua Key Laboratory of Geographic Process Analysis&Simulation Hubei Province Central China Normal UniversityWuhan430079China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing100101China

Exploring carbon emission effects based on the evolution of residents’ dietary structure to achieve the carbon neutrality goal and mitigate climate change is an important *** study took China as the research object(data excluding Hong Kong,Macao and Taiwan) and used the carbon emission coefficient method to quantitatively measure the food carbon emissions from 1987–2020,then analyzed the carbon emission effects under the evolution of dietary *** results showed that during the study period,the Chinese dietary structure gradually changed to a high-carbon consumption *** dietary structure of urban residents developed to a balanced one,while that of rural residents developed to a high-quality *** the study period,the per capita food carbon emissions and total food consumption of Chinese showed an increasing *** per capita food carbon emissions of residents in urban and rural showed an overall upward *** total food carbon emissions in urban increased significantly,while that in rural increased first and then *** influence of beef and mutton on carbon emissions is the highest in dietary *** with the balanced dietary pattern,the food carbon emissions of Chinese residents had not yet reached the peak,but were evolving to a high-carbon consumption pattern.

关键词： dietary structure structural evolution carbon emission effects carbon neutrality China

Designing hierarchical structures for innovative cooling textile

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Nano Research 2024年第10期17卷 9202-9224页

作者： Xiran Du Jinlei Li Bin zhu Jia zhu National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsNanjing UniversityNanjing 210023China School of Sustainable Energy and Resources Nanjing UniversitySuzhou 215163China

The potential of personal cooling technologies in reducing air conditioning energy consumption and enhancing human thermal comfort is *** review focuses on recent advancements in hierarchical structure design for innovative cooling *** with insights into fundamental heat transfer processes between the human body,textile,and the surroundings,we uncover key control *** the advanced hierarchical structure designs enabling effective radiation,sweat evaporation,conduction management,and integration of cold energy sources for realizing effective human body cooling are systematically ***,we explore multifunctional designs beyond cooling,including switchable cooling-heating and ***,we engage in discussions on unifying cooling performance tests and additional multiple requirements to make strides toward practical *** review is anticipated to be a valuable resource,providing the scientific and industrial communities with a quick grasp of past advancements,current challenges,and future directions in achieving effective human body cooling.

关键词： thermal comfort personal cooling textile hierarchical structures

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用偏心转盘塔萃取纯化含铀废料

湿法冶金 2021年第3期40卷 249-254页

作者：万强诸方平谭星星中核建中核燃料元件有限公司四川宜宾644000

研究了采用偏心转盘塔替代混合澄清槽对含铀废料进行萃取纯化,考察了转盘雷诺数、通量等对萃取的影响。结果表明:原料液中杂质含量对偏心转盘塔萃取效果影响很小;在V_(o)/V_(a)=1.2/1、转盘雷诺数约13824、通量为66 L/h(芯块溶解液)和55... 详细信息

研究了采用偏心转盘塔替代混合澄清槽对含铀废料进行萃取纯化,考察了转盘雷诺数、通量等对萃取的影响。结果表明:原料液中杂质含量对偏心转盘塔萃取效果影响很小;在V_(o)/V_(a)=1.2/1、转盘雷诺数约13824、通量为66 L/h(芯块溶解液)和55 L/h(碱渣浸出液)条件下,萃取效果较好;在V_(a)/V_(o)=1.2/1、转盘雷诺数约23128、通量为55 L/h条件下,2种原料液均有较好反萃取效果;偏心转盘塔替代混合澄清槽萃取纯化含铀废料效果较好,可在工业放大设计中参考应用。

关键词：偏心转盘塔萃取纯化含铀废料