检索结果-内蒙古大学图书馆

Corrosion behavior of novel Cu-Ni-Al-Si alloy with super-high strength in 3.5% NaCl solution

Transactions of Nonferrous Metals Society of China 2017年第5期27卷 1096-1104页

作者： Jia-jun ZHU San-hua LI Lei-nuo SHEN Wu-lin YANG Zhou LI College of Materials Science and Engineering Hunan University Changsha 410082 China Hunan Province Key Laboratory for Spray Deposition Technology and Application Hunan University Changsha 410082 China School of Materials Science and Engineering Central South University Changsha 410083 China

A novel Cu?6.5Ni?1Al?1Si?0.15Mg?0.15Ce alloy with super-high strength was designed and its corrosion behavior in3.5%NaCl solution at25°C was investigated by the means of SEM observation,TEM observation and XPS *** alloy after solution treatment,80%cold rolling and aging at450°C for1h had the best comprehensive properties with hardness of HV314,electrical conductivity of19.4%IACS,tensile strength of1017MPa,and average annual corrosion rate of0.028mm/*** oxides and chloride products formed at first,followed by the formation of dyroxides *** alloy showed super-high strength,good electrical conductivity and corrosion resistant because Ni2Si hindered the precipitation of large NiAl at the grain boundary and the denickelefication of the alloy.

关键词： Cu-Ni-Al-Si alloy Ni2Si precipitate corrosion behavior average annual corrosion rate corrosion product

来源：评论

学校读者我要写书评

暂无评论

Ultrafine Sn_(4)P_(3)nanocrystals from chloride reduction on mechanically activated Na surface for sodium/lithium ion batteries

引用

Nano Research 2020年第11期13卷 3157-3164页

作者： Zhiliang Liu Xiangxi Wang Zhuoyan Wu Sungjin Yang Shaolei Yang Shunpeng Chen Xinteng Wu Xinghua Chang Piaoping Yang Jie Zheng Xingguo Li Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin150001China Beijing National Laboratory for Molecular Sciences(BNLMS) College of Chemistry and Molecular EngineeringPeking University5 Yiheyuan RoadBeijing100871China Comprehensive Energy Research Center Institute of Science and TechnologyChina Three Gorges CorporationBeijing100038China Key Laboratory for Mineral Materials and Application of Hunan Province School of Minerals Processing and BioengineeringCentral South UniversityChangsha410083China

Nanostructured metal phosphides are very attractive materials in energy storage and conversion,but their applications are severely limited by complicated preparation steps,harsh conditions and large excess of highly toxic phosphorus *** we develop a highly efficient one-step method to synthesize Sn_(4)P_(3)nanostructure based on simultaneous reduction of SnCl_(4)and PCl_(3)on mechanically activated Na surface and in situ *** low-toxic PCl3 displays a very high phosphorizing efficiency(100%).Furthermore,this simple method is powerful to control phosphide *** Sn_(4)P_(3)nanocrystals(<5 nm)supported on carbon sheets(Sn_(4)P_(3)/C)are obtained,which is due to the unique bottom-up surface-limited *** the anode material for sodium/lithium ion batteries(SIBs/LIBs),the Sn_(4)P_(3)/C shows profound sodiation/lithiation extents,good phase-conversion reversibility,excellent rate performance and long cycling stability,retaining high capacities of 420 mAh/g for SIBs and 760 mAh/g for LIBs even after 400 cycles at 1.0 A/*** simple and efficient preparation,low-toxic and high-efficiency phosphorus source and good control of nanosize,this method is very promising for low-cost and scalable preparation of high-performance Sn_(4)P_(3)anode.

关键词： metal phosphide chloride reduction ultrafine Sn_(4)P_(3)nanocrystals lithium-ion battery(LIB) sodium-ion battery(SIB) anode material

来源：评论

学校读者我要写书评

暂无评论

超高性能混凝土钢纤维-基体界面黏结性能研究综述

引用

Engineering 2023年第3期22卷 215-232页

作者：邓毓琳张祖华史才军吴泽媚张超慧 Key Laboratory for Green&Advanced Civil Engineering Materials and Application Technology of Hunan Province College of Civil EngineeringHunan UniversityChangsha 410082China Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education School of Materials Science and EngineeringTongji UniversityShanghai 201804China

超高性能混凝土(UHPC)是一种相对较新的水泥混凝土复合材料,由于其优异的机械强度和耐久性,在基础设施建设中具有巨大的应用潜力。钢纤维与基体的界面黏结性能是决定UHPC其他力学性能的主要因素,包括抗拉、抗折、抗压强度和破坏模式(断... 详细信息

超高性能混凝土(UHPC)是一种相对较新的水泥混凝土复合材料,由于其优异的机械强度和耐久性,在基础设施建设中具有巨大的应用潜力。钢纤维与基体的界面黏结性能是决定UHPC其他力学性能的主要因素,包括抗拉、抗折、抗压强度和破坏模式(断裂行为)。本文通过讨论并比较多种纤维拉拔测试方法和分析模型,全面综述了UHPC的纤维-基体黏结行为的研究进展;详细确定并讨论了影响纤维-基体黏结的参数,包括纤维的几何形状和方向、表面处理、基体的组成和强度。最后,基于现有研究,对未来UHPC增强方法和测试细节提出了建议。

关键词： Ultra-high performance concrete Interfacial bond Steel fiber Pullout behavior

来源：评论

学校读者我要写书评

暂无评论

Graphene Films Synthesized by Ultrasonic Spray Pyrolysis

Graphene Films Synthesized by Ultrasonic Spray Pyrolysis

引用

2014中国功能材料科技与产业高层论坛

作者： Wei Liu Xiaohua Chen Weina Deng Aiping Hu Qunli Tang College of Materials Science and Engineering Hunan Province Key Laboratory for Spray Deposition Technology and ApplicationHunan University

Graphene films were synthesized by ultrasonic spray *** well-graphitized Graphene films with different layers from 2 to 8 have been obtained on nickel foam substrate by using ethanol *** images show continual large area graphene films covered whole nickel foam surface,while Raman spectra confirm that as-grown multi-to few-layer graphene films with high quality were obtained at different *** results further show high degree of crystallinity of transferred graphene *** procedure described can be scaled up for large-scale production at low cost.

关键词： Ultrasonic spray pyrolysis graphene films liquid precursor

来源：评论

学校读者我要写书评

暂无评论

Recent advances of SiO_(x)-based anodes for sustainable lithium-ion batteries

引用

Nano Research Energy 2023年第3期2卷 66-88页

作者： Mengyu Zhang Naiwen Liang Derek Hao Zuxin Chen Fan Zhang Jiang Yin Yahui Yang Li-shan Yang Key Laboratory of Chemical Biology&Traditional Chinese Medicine Research(Ministry of Education of China) National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of ResourcesKey Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceHunan Normal UniversityChangsha 410081China School of Science STEM CollegeRMIT UniversityMelbourne 3000Australia School of Semiconductor Science and Technology South China Normal UniversityFoshan 528225China International Iberian Nanotechnology Laboratory(INL) 4715-330 BragaPortugal

The world is facing an ever-growing global energy crisis with unprecedented depth and *** sustainable development of high energy density lithium-ion batteries for electric vehicles and portable electric devices has become a feasible way to deal with this *** suboxides(SiO_(x))have been deemed as one of the most promising anode materials because of their ultrahigh theoretical lithium storage capacity,proper working potential,natural abundance,and environmental ***,the mass utilization of SiO_(x)-based anodes is severely obstructed by their low electrical conductivity and inevitable volume *** lithium silicate and lithium oxide formed in the first lithiation process act as buffer layers to some extent,it is urgent to address the accompanying low initial Coulombic efficiency and unsatisfactory cycling *** this review,we summarized recent advances in the synthesis methods of SiO_(x)-based ***,the benefits and shortcomings of the various methods are briefly ***,we discussed the effective combination of SiO_(x) with carbon materials and designs of porous structure,which could considerably enhance the electrochemical performance in ***,progresses on the modified strategies,advanced characteristics and industrial applications for SiO_(x)-based anodes are also ***,the remaining challenges encountered and future perspectives on SiO_(x)-based anodes are highlighted.

关键词： SiO_(x)anodes lithium-ion batteries synthesis methods SiO_(x)/C composites porous

来源：评论

学校读者我要写书评

暂无评论

Intelligent Logistics Service Quality Assurance Mechanism Based on Federated Collaborative Cache in 5G+ Edge Computing Environment 16th

Intelligent Logistics Service Quality Assurance Mechanism Ba...

引用

16th EAI International Conference on Wireless Internet, WiCON 2023

作者： Liu, Yiwen Fu, Jinrong Zhao, Zikai Yang, Yahui Peng, Ling Qu, Taiguo Feng, Tao School of Computer and Artificial Intelligence Huaihua University Huaihua418000 China Key Laboratory of Wuling-Mountain Health Big Data Intelligent Processing and Application in Hunan Province Universities Huaihua418000 China Key Laboratory of Intelligent Control Technology for Wuling-Mountain Ecological Agriculture in Hunan Province Huaihua418000 China School of Foreign Languages Huaihua University Huaihua418000 China

ISBN: (纸本)9783031580529

Aiming at the problem of quality assurance of intelligent logistics service in 5G+ edge computing environment, this paper proposes a mechanism based on federated cooperative cache, which aims to utilize the computing and storage resources of edge nodes to realize rapid processing and sharing of logistics data and improve the efficiency and reliability of logistics services. This paper first analyzes the characteristics and challenges of intelligent logistics services under 5G+ edge computing environment, and then introduces the concept and principle of federated cooperative cache, as well as its application scenarios and advantages in intelligent logistics services. Then, this paper designs an intelligent logistics service quality assurance mechanism based on federated cooperative cache, including five modules such as data partitioning, data transmission, data fusion, data access and data update, and gives the corresponding algorithms and processes. Finally, this paper verifies the effectiveness and performance of the proposed mechanism through simulation experiments. Compared with the traditional centralized cache and distributed cache, the proposed mechanism can reduce the data transmission delay, improve the data hit rate and data consistency, so as to ensure the quality of intelligent logistics services. In the future, the federated collaborative cache mechanism can be further optimized to consider the needs of multiple scenarios. And explore the application potential of other areas to drive the continuous development and innovation of intelligent logistics services. © ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2024.

关键词： Edge computing

来源：评论

学校读者我要写书评

暂无评论

Research on Highly Secure Metaverse Based on Extended Reality Under Edge Computing 16th

Research on Highly Secure Metaverse Based on Extended Realit...

引用

16th EAI International Conference on Wireless Internet, WiCON 2023

作者： Fu, Jinrong Liu, Yiwen Yan, Haobo Yang, Yahui Peng, Ling Shi, Yuanquan Feng, Tao School of Computer and Artificial Intelligence Huaihua University Huaihua418000 China Key Laboratory of Wuling-Mountain Health Big Data Intelligent Processing and Application in Hunan Province Universities Huaihua418000 China Key Laboratory of Intelligent Control Technology for Wuling-Mountain Ecological Agriculture in Hunan Province Huaihua418000 China School of Foreign Languages Huaihua University Huaihua418000 China

ISBN: (纸本)9783031580529

With the explosion of ChatGPT, the development of artificial intelligence technology ushered in another explosion. Similarly, with the rapid development of extended reality technology and Internet of Things technology, Metaverse will also usher in greater breakthroughs. However, in the development of the extended reality metaverse under edge computing, many security issues will arise. This paper focuses on data security, considering that data will be transmitted and processed between multiple devices and nodes instead of being concentrated in the cloud, which may bring To solve data security issues, relying on the integrated architecture of Metaverse educational applications based on edge computing (MEC), it provides an identity verification and access with higher security and scalability, better performance, and service requirements that meet the current environment Control mechanism solutions, while analyzing other problems that will arise during the development of the extended reality metaverse. Aiming at the security problem on the edge side, a signature authentication scheme is designed based on Elliptic Curve Cryptography (ECC) integrated blockchain encryption technology and the effectiveness of the method is proved. In order to promote the extended reality metaverse under edge computing, it provides a mirror for the application in the field of education under the condition of ensuring data security. © ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2024.

关键词： Edge computing

来源：评论

学校读者我要写书评

暂无评论

Electrochemical detection of nitrite based on diblock copolymers poly(ethylene oxide)-b-poly2-(dimethylamino)ethyl methacrylate (PEO-b-PDMAEMA)

引用

Sensor Letters 2015年第7期13卷 592-598页

作者： Yin, Yefeng Yi, Jie Tang, Shuai Yang, Sui College of Chemistry Xiangtan University XiangtanHunan Province China Key Laboratory of Polymeric Materials and Application Technology of Hunan Province Xiangtan University XiangtanHunan Province China Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province Xiangtan University XiangtanHunan Province China Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education Xiangtan University XiangtanHunan Province China Faculty of Materials Optoelectronics and Physics Xiangtan University XiangtanHunan Province China

A novel non-enzyme nitrite sensor based on diblock copolymers poly(ethylene oxide)-b-poly(2-(dimethylamino)ethyl methacrylate) (PEO-b-PDMAEMA) and multi-walled carbon nanotubes (MWCNTs) composite film was constructed. The PEO-b-PDMAEMA/MWCNTs modified glass carbon electrodes (GCE) (denoted as PEO-b-PDMAEMA/MWCNTs/GCE) exhibited excellent electrocatalytic performance for the oxidation of nitrite. The effect of the PEO-b-PDMAEMA thermo-sensitive properties on the current response of nitrite was studied. The sensor enhances electrocatalytic properties towards the oxidation of nitrite with increasing solution temperature. Furthermore, the sensor exhibited sensitive response to nitrite with a wide linear range from 1.0 × 10-6 to 1.0 × 10-4 M, a low detection limit of 1.0 × 10-6 M and a high sensitivity of 562.16 μA mM-1 cm-2 as well as good stability and repeatability. These results indicated that the proposed composite films modified electrode has good promote applicability for detection nitrite. Copyright © 2015 American Scientific Publishers All rights reserved.

关键词： Block copolymers

来源：评论

学校读者我要写书评

暂无评论

3D visualization technique of human organs

引用

Journal of Information and Computational Science 2008年第2期5卷 481-488页

作者： Song, Limei Huang, Jinghuan Hu, Liqin Province Key Laboratory of Robot Technique and Application Information Engineering College Southwest University of Science and Technology Mianyang 621010 China

3D visualization of human organs is very important for human analysis. The 3D result is very useful for the surgery analysis, and it can also be used to produce human model by carve machine or 3D printer. There is a lot of method to got 3D data, such as 3D laser scan system, 3D phase measurement, shape from shading, shape from motion, shape from focus, shape from photometric, shape from stereo, etc. Laser scan system is the most commonly used method, but its measurement range relies much on the size of rotation or translation flat. Its measurement precision also relies much on the hardware precision. This paper will introduce a non-orbit, non-contact 3D measurement. The main idea is from shape from stereo technique. It will use two cameras to get the 3D data by the help of lighting system. The two cameras are placed in different view angle. After the high precision calibration system, the 3D absolute stereo coordinate can be got. The proposed 3D imaging method is proved that it is a high precision, low cost, and easy operation stereo matching method. It can be used to the visualization of human face, human head, human tooth, human body, etc. The visualization data can be used in the Face recognition or face surgery, tooth surgery, biologic Computer-aided instruction, human art etc. This method can help the doctor to analyze the surgery before the real surgery starts, thus to decrease the medical accident. The 3D data can also store more vivid information for human art and human memory. The 3D visualization method, the calibration system, the 3D data acquisition system, and the application of 3D visualization data will all be introduced in the paper.

关键词： Calibration

来源：评论

学校读者我要写书评

暂无评论

Synergically improved energy storage performance and stability in sol–gel processed BaTiO_(3)/(Pb,La,Ca)TiO_(3)/BaTiO_(3) tri-layer films with a crystalline engineered sandwich structure

引用

Journal of Advanced Ceramics 2023年第12期12卷 2300-2314页

作者： Jinpeng Liu Ying Wang Hanfei Zhu Hongyu Luo Xiao Zhai Yu Huan Jing Yan Kun Wang Chao Liu Hongbo Cheng Jun Ouyang School of Chemistry and Chemical Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China School of Physics Shandong UniversityJinan 250100China School of Material Science and Engineering University of JinanJinan 250022China College of Physics and Electronic Engineering Qilu Normal UniversityJinan 250200China China Tobacco Shandong Industrial Co. Ltd.Jinan 250014China Key Laboratory of Key Film Materials&Application for Equipments(Hunan Province) Hunan Provincial Key Laboratory of Thin Film Materials and DevicesSchool of Material Sciences and EngineeringXiangtan UniversityXiangtan 411105China

Achieving an excellent energy storage performance,together with high cycling reliability,is desirable for expanding technological applications of ferroelectric ***,in well-crystallized ferroelectric materials,the concomitant high polarizability and low polarization saturation field have led to a square-shaped polarization–electric field loop,fatally impairing both recoverable energy density(W_(rec))and efficiency(η).Nanocrystalline ferroelectric films with a macroscopically amorphous structure have shown an improved W_(rec) andη,but their much lower polarizability demands an extremely high electric field to achieve such performances,which is undesirable from an economic ***,we propose a strategy to boost the energy storage performances and stability of ferroelectric capacitors simultaneously by constructing a tri-layer film in which a well-crystallized ferroelectric layer was sandwiched by two pseudo-linear dielectric layers with a dominant amorphous *** sol–gel-derived BaTiO_(3)/(Pb,La,Ca)TiO_(3)/BaTiO_(3)(BTO/PLCT/BTO)tri-layer films,we show that the above design is realized via rapid thermal annealing which fully crystallized the middle PLCT layer while left the top/bottom BTO cap layers in a poor crystallization *** sandwiched structure is endowed with an enhanced maximum polarization while a small remnant one and a much-delayed polarization saturation,which corresponds to large W_(rec)≈80 J/cm^(3) and highη≈86%.Furthermore,the film showed an outstanding cycling stability:its W_(rec) andηremain essentially unchanged after 10^(9) electric cycles(DW/W<4%,Dη/η<2%).These good energy storage characteristics have proved the effectiveness of our proposed strategy,paving a way for the utilization of sandwiched films in applications of electric power systems and advanced pulsed-discharge devices.

关键词： energy storage sandwich film amorphous structure nanocrystal cluster stability

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：