检索结果-内蒙古大学图书馆

Corrigendum to ‘The synergistic effect of ultrasound and Er on the microstructure and mechanical properties of an Al–Cu alloy with high Fe content’ [J Mater Res Technol 36 (2025) 2053–2063]

引用

Journal of materials Research and technology 2025年 36卷 6433-6433页

作者： Jinxin Cai Li Zhang Longfei Li Guangxi Lu Cong Xu Ripeng Jiang Yanfang Zhang Lihong Wu Shaokang Guan School of Materials Science and Engineering Henan Province Key Laboratory of Advanced Light Alloys Zhengzhou University Zhengzhou 450001 China State Key Laboratory of Precision Manufacturing for Extreme Service Performance Central South University Changsha 410083 China Sanying Precision Instruments Co. Ltd. Tianjin 300399 China Key Laboratory of Materials Processing and Mold (Ministry of Education) Zhengzhou University Zhengzhou 450001 China

来源：评论

学校读者我要写书评

暂无评论

Nanofibril Organization in Silk Fiber as Inspiration for Ductile and Damage-Tolerant Fiber Design

引用

advanced Fiber materials 2019年第3期1卷 231-240页

作者： Shihui Lin Chao Ye Wenwen Zhang Anchang Xu Shixian Chen Jing Ren Shengjie Ling School of Physical Science and Technology ShanghaiTech University393 Middle Huaxia RoadShanghai 201210China Jiangsu Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources Jiangsu Key Lab of Biomass‑Based Green Fuel and ChemicalsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China State Key Laboratory of New Textile Materials and Advanced Processing Technology School of Textile Science and EngineeringWuhan Textile UniversityWuhan 430200China

Ductile and damage-tolerant fibers(DDTFs)are desired in aerospace engineering,mechanical engineering,and biomedical engineering because of their ability to prevent the catastrophic sudden structural/mechanical ***,in practice,design and fabrication of DDTFs remain a major challenge due to finite fiber size and limited processing *** this regard,animal silks can provide *** are hierarchically structured protein fibers with an elegant trade-off of mechanical strength,extensibility and damage tolerance,making them one of the toughest materials *** this article,we confirmed that nanofibril organization could improve the ductility and damage-tolerance of silk fibers through restricted fibril shearing,controlled slippage and *** by these strategies,we further established a rational strategy to produce polyamide DDTFs by combining electrospinning and yarn-spinning *** resultant polymeric DDTFs show a silk-like fracture resistance behavior,indicating potential applications in smart textile,biomedicine,and mechanical engineering.

关键词： Fiber Silk Mechanical property Damage tolerance Bioinspired materials

来源：评论

学校读者我要写书评

暂无评论

Enhancement of Optical Signal-to-Noise Ratio Based on Phase-Sensitive Amplification at Low Gain Levels

Enhancement of Optical Signal-to-Noise Ratio Based on Phase-...

引用

Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Zhirong Chen Xiaojie Guo Zhaohui Li Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems State Key Laboratory of Optoelectronic Materials and Technologies and School of Electronics and Information Technology Sun Yat-sen University Guangzhou China Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics Technology Jinan University Guangzhou China Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai China

ISBN: (纸本)9781665410953

We experimentally investigated optical signal-to-noise ratio (OSNR) enhancement in phase-sensitive amplifiers (PSA) at low gain levels. With balanced input signal-idler powers and OSNRs, nearly 3-dB OSNR improvement is obtained in a PSA with a PS gain as low as 6.4 dB, resulting in SNR improvement of 2.4 dB for 20-GBaud QPSK signal.

关键词： Phase shift keying Stimulated emission Noise reduction Asia Optical noise Optical amplifiers Gain

来源：评论

学校读者我要写书评

暂无评论

Microstructure and Mechanical Properties of AISI 304L Austenitic Stainless Steel Processed by Various Schedules of Rolling 7

Microstructure and Mechanical Properties of AISI 304L Austen...

引用

7th All-Russian Conference on Nanomaterials, NANO 2020

作者： Raab, A.G. Raab, G.I. Tokar, A.A. Rybalchenko, O.V. Belyakov, A.N. Dobatkin, S.V. La, P. Institute of Physics of Advanced Materials Ufa State Aviation Technical University K. Marx st. 12 Ufa450008 Russia A A Baikov Institute of Metallurgy and Materials Science of Ras Leninsky pr. 49 Moscow119334 Russia Belgorod State University Pobeda st. 85 Belgorod308015 Russia State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou China National University of Science and Technology "misis" Leninskiy pr. 4 Moscow119049 Russia

The paper studies various rolling schedules implemented at 500°C (incl. direct, reverse, and cross rolling) and their effect on the structure formation and mechanical properties in AISI 304L stainless steel samples. Both TEM and SEM research techniques were applied. An ultrafine grain-subgrain microstructure was found to be formed inside elongated original grains. Rolling-processed microstructural elements were close in their size with the minimum value observed after a reverse rolling (240 nm). Mechanical properties were studied using microhardness measurements and tensile testing revealing a considerable increase in strength accompanied by a density reduction upon deformation. The strength values in the material subjected to all three rolling schedules are relatively close to the highest yield strength and ultimate tensile stress observed after reverse rolling with a strain degree of 70%. © Published under licence by IOP Publishing Ltd.

关键词： Tensile testing

来源：评论

学校读者我要写书评

暂无评论

Ultra-wideband electrostrictive mechanical antenna

arXiv

引用

arXiv 2021年

作者： Xu, Jianchun Li, Zhao Pan, Xuchao Wen, Xi Cao, Jinqing Gong, Wen Yang, Shaolong Lei, Ming Yao, Fangzhou Bi, Ke State Key Laboratory of Information Photonics and Optical Communications School of Electronic Engineering School of Science Beijing University of Posts and Telecommunications Beijing100876 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China School of Mechanical Engineering Nanjing University of Science and Technology Nanjing210094 China Research Center of Advanced Functional Ceramic Materials Wuzhen Laboratory Jiaxing314500 China Center of Advanced Ceramic Materials and Devices Yangtze Delta Region Institute Tsinghua University Zhejiang314006 China

Conventional mechanical antennas provide a strategy in long-wave communication with a surprisingly compact size below 1/1,000 of the wavelength. However, the narrow bandwidth and weak field intensity seriously hamper its practical applications. Here, we present a mechanical antenna based on the electrostrictive effect of PMN-PT-based relaxor ferroelectric ceramic to improve radiation capacity and achieve ultra-wideband characteristics (10 kHz - 1 MHz, the relative bandwidth is beyond 196%). Determined by the different underlying mechanism, the mechanical antenna based on the electrostrictive effect exhibits excellent communication properties from traditional mechanical antennas. The functions of signal coding, transmitting, receiving, and decoding were experimentally demonstrated. This approach offers a promising way of constructing mechanical antennas for long-wave communication. Copyright © 2021, The Authors. All rights reserved.

关键词： Antennas

来源：评论

学校读者我要写书评

暂无评论

Electronic Metal-Support Interaction Induces Hydrogen Spillover and Platinum Utilization in Hydrogen Evolution Reaction

引用

Angewandte Chemie 2024年第1期137卷

作者： Yumei Feng Yuhua Xie Yingjie Yu Dr. Yazhou Chen Prof. Dr. Qingting Liu Prof. Dr. Haifeng Bao Dr. Fang Luo Shuyuan Pan Prof. Dr. Zehui Yang State Key Laboratory of New Textile Materials & Advanced Processing Technology College of Materials Science and Engineering Wuhan Textile University Wuhan 430200 China Faculty of Materials Science and Chemistry China University of Geosciences Wuhan 388 Lumo RD Wuhan 430074 China Y. Feng Y. Xie and Y. Yu equally contributed to this work. Hubei Provincial Key Laboratory of Green Materials for Light Industry Hubei University of Technology Wuhan 430068 China

The substantial promotion of hydrogen evolution reaction (HER) catalytic performance relies on the breakup of the Sabatier principle, which can be achieved by the alternation of the support and electronic metal support interaction (EMSI) is noticed. Due to the utilization of tungsten disulfides as support for platinum (Pt@WS 2 ), surprisingly, Pt@WS 2 demands only 31 mV overpotential to attain 10 mA cm −2 in acidic HER test, corresponding to a 2.5-fold higher mass activity than benchmarked Pt/C. The pH dependent electrochemical measurements associated with H 2 -TPD and in situ Raman spectroscopy indicate a hydrogen spillover involved HER mechanism is confirmed. The WS 2 support triggers a higher hydrogen binding strength for Pt leading to the increment in hydrogen concentration at Pt sites proved by upshifted d band center as well as lower Gibbs free energy of hydrogen, favourable for hydrogen spillover. Besides, the WS 2 shows a comparably lower effect on Gibbs free energy for different Pt layers (−0.50 eV layer −1 ) than carbon black (−0.88 eV layer −1 ) contributing to a better Pt utilization. Also, the theoretical calculation suggests the hydrogen spillover occurs on the 3 rd Pt layer in Pt@WS 2 ; moreover, the energy barrier is lowered with increment in hydrogen coverage on Pt. Therefore, the boosted HER activity attributes to the EMSI effect caused hydrogen spillover and enhancement in Pt utilization efficiency.

关键词： Hydrogen evolution reaction Electronic metal-support interaction Hydrogen spillover Tungsten sulfides in situ Raman spectroscopy

来源：评论

学校读者我要写书评

暂无评论

Solvent-free synthesis of Co single atom and nanocluster decorated N-doped carbon for efficient oxygen reduction

引用

Chinese Chemical Letters 2024年

作者： Xinyuan Li Zhuozhu Li Wenzhong Huang Jiantao Li Wei Zhang Shihao Feng Hao Fan Zhuo Chen Sungsik Lee Congcong Cai Liang Zhou Hubei Longzhong Laboratory Wuhan University of Technology (Xiangyang Demonstration Zone) Xiangyang 441000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Chemical Sciences and Engineering Division Argonne National Laboratory Lemont IL 60439 United States X-ray Science Division Argonne National Laboratory Lemont IL 60439 United States Zhongyu Feima New Material Technology Innovation Center (Zhengzhou) Co. Ltd. High Technology Industrial Development Zone Zhengzhou 450001 China

The advancement of efficient, cheap, and durable catalysts for oxygen reduction reaction (ORR) to substitute Pt/C in metal-air batteries is of paramount importance. However, traditional solvent-based methods fall short in terms of environmental benign and scalability. Herein, a solvent-free organic-inorganic self-assembly approach is explored to construct cobalt single atom and cobalt nanocluster decorated nitrogen-doped porous carbon spheres (Co-SA/NC@NCS). The solvent-free synthesis demonstrates an impressively high yield (282 g/L) and the resultant Co-SA/NC@NCS possesses a high N content (6.9 wt%). Density functional theory calculations disclose that the Co-SAs and Co-NCs are able to optimize the surface oxygen adsorption capability and enhance the conductivity of the NCS, thereby facilitating the ORR performance. The solvent-free synthesis is also feasible for the synthesis of other non-noble metal element (Fe, Ni, and Zn) decorated nitrogen-doped porous carbon spheres.

关键词： Organic-inorganic self-assembly Nitrogen-doped carbon Oxygen reduction reaction Single atom catalyst Zn-air battery

来源：评论

学校读者我要写书评

暂无评论

Tailoring Zirconia Supported Intermetallic Platinum Alloy via Reactive Metal-Support Interactions for High-Performing Fuel Cells

引用

Angewandte Chemie 2024年第26期136卷

作者： Zijie Lin Nadaraj Sathishkumar Yu Xia Shenzhou Li Xuan Liu Jialun Mao Hao Shi Prof. Gang Lu Prof. Tanyuan Wang Prof. Hsing-Lin Wang Prof. Yunhui Huang Prof. Lior Elbaz Prof. Qing Li State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology 430074 Wuhan China Department of Physics and Astronomy California State University Northridge 91330 Northridge CA USA Department of Materials Science and Engineering Southern University of Science and Technology 518055 Shenzhen China Department of Chemistry and the Institute of Nanotechnology and Advanced Materials Bar-Ilan University 5290002 Ramat-Gan Israel

Developing efficient and anti-corrosive oxygen reduction reaction (ORR) catalysts is of great importance for the applications of proton exchange membrane fuel cells (PEMFCs). Herein, we report a novel approach to prepare metal oxides supported intermetallic Pt alloy nanoparticles (NPs) via the reactive metal-support interaction (RMSI) as ORR catalysts, using Ni-doped cubic ZrO 2 (Ni/ZrO 2 ) supported L1 0 −PtNi NPs as a proof of concept. Benefiting from the Ni migration during RMSI, the oxygen vacancy concentrations in the support are increased, leading to an electron enrichment of Pt. The optimal L1 0 −PtNi−Ni/ZrO 2 −RMSI catalyst achieves remarkably low mass activity (MA) loss (17.8 %) after 400,000 accelerated durability test cycles in a half-cell and exceptional PEMFC performance (MA=0.76 A mg Pt −1 at 0.9 V, peak power density=1.52/0.92 W cm −2 in H 2 −O 2 /−air, and 18.4 % MA decay after 30,000 cycles), representing the best reported Pt-based ORR catalysts without carbon supports. Density functional theory (DFT) calculations reveal that L1 0 −PtNi−Ni/ZrO 2 −RMSI requires a lower energetic barrier for ORR than L1 0 −PtNi−Ni/ZrO 2 (direct loading), which is ascribed to a decreased Bader charge transfer between Pt and *OH, and the improved stability of L1 0 −PtNi−Ni/ZrO 2 −RMSI compared to L1 0 −PtNi−C can be contributed to the increased adhesion energy and Ni vacancy formation energy within the PtNi alloy.

关键词： oxygen reduction reaction zirconia reactive metal-support interaction intermetallics fuel cells

来源：评论

学校读者我要写书评

暂无评论

Digital medical education empowered by intelligent fabric space

引用

National Science Open 2022年第1期1卷 68-77页

作者： Min Chen Rui Wang Rui Wang Yingting Zhou Zicheng He Xiaojuan Liu Muyao He Jiaxi Wang Chaolin Huang Huamin Zhou Ping Hong Chong Hou Ning Zhou Dingyu Zhang Guangming Tao Sport and Health Initiative Optical Valley Laboratory and Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China School of Computer Science and Technology Huazhong University of Science and TechnologyWuhan 430074China Wuhan Jinyintan Hospital Wuhan 430048China State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Beijing Sport University Beijing 100091China School of Optics and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Tongji Medical College Huazhong University of Science and TechnologyWuhan 430074China Hubei Provincial Health and Health Committee Wuhan 430015China

Medical education plays an important role in promoting the development of global medical ***,the intrinsic gap existing between institutional medical teaching and practical clinical tasks causes low education efficiency and students’weak *** developments of sensing fabric and embedded computing,along with the advances in artificial intelligence(AI)and digital twin technology are paving the way for the transformation of medical research towards *** this work,we present an intelligent fabric space based on novel functional fabric materials and digital twin networking enabled by 5G and internet of things(IoT)*** this space,medical students can learn knowledge with collaborative mapping of the digital and real world,cyber-physical interaction and real-time tactile *** the proposed service system will evaluate and feedback students’operational behaviors to improve their experimental *** provide four typical applications of intelligent fabric space for medical education,including medical education training,health and behavior tracking,operation playback and reproduction,as well as medical knowledge *** proposed intelligent fabric space has the potential to promote innovative technologies for training cutting-edge medical students by effective and efficient ways.

关键词： medical education intelligent fabric digital twin tactile interaction

来源：评论

学校读者我要写书评

暂无评论

Progress and perspectives on molecular design of crosslinked polymer electrolytes for solid-state lithium batteries

Review of Materials Research

引用

Review of materials Research 2025年第1期1卷

作者： Fei Pei Lin Wu Wenjie Lin Yi Zhang Qi Kang Fenghua Zhang Yuan Shen Qiang Gao Zhenyu Huang Yunhui Huang State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China Institute of New Energy for Vehicles School of Materials Science and Engineering Tongji University Shanghai 201804 China Zhejiang Geely Holding Group Co. Ltd. Hangzhou 310051 China

Solid-state polymer electrolytes (SPEs) coupling with high-specific-energy cathodes/anodes are candidate schemes for meeting the safety and energy density needs of next generation lithium batteries due to the reinforced mechanical/chemical and electrochemical stability. However, many pressing challenges, such as low ionic conductivity, large interfacial resistance and side reactions, hindering their practical applications in solid-state lithium batteries (SSLBs). Crosslinked SPEs as one of the most attractive structures exhibit many advantages, such as superior mechanical strength, thermal/chemical stability, and reduced crystallinity. The design/synthesis strategies of crosslinked SPEs and how do the geometric structural parameters affect electrochemical performance of the SPEs are not fully understood. This review comprehensively summarizes the very recent advances of crosslinked SPEs for SSLBs by discussing the related publications, which involves physical and chemical crosslinking strategies. The selection of crosslinked monomers and reaction type are classified in detail. The relationships between crosslinking structures and physical/electrochemical properties at molecular level are comprehensive analyzed. Finally, the challenges and future prospects of crosslinked SPEs in this rapidly evolving field are outlined. Overall, this review is expected to serve as a guide for designing high-performance crosslinked SPEs, and will receive widespread attention in the field of binders, separators, hydrogels, electronic skin and engineering plastics.

关键词： Crosslinked polymer electrolytes Solid-state lithium batteries Physical crosslinking Chemical crosslinking High energy density

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：