检索结果-内蒙古大学图书馆

SSRN 2024年

作者： Zhong, Lingshan Du, Zijuan Guo, Siyu Ren, Xianglong Qiao, Ang Tao, Haizheng State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan430070 China Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Zhongshan528400 China

Metal node substitution is a feasible approach to modify the properties and functions of metal-organic frameworks (MOFs). In this work, we synthesized a series of bimetallic Zn1-xCox-ZIF-62 glass membranes (the molar ratio x = 0.05, 0.1, 0.2, 0.3) by melt-quenching their corresponding polycrystalline membranes, which were prepared by an in-situ solvothermal method. Interestingly, the replacement of Zn by Co in the ZIF-62 glass membrane led to a mixed-metal node effect on the gas separation performance, i.e., a nonlinear change of the separation selectivity for CO2/CH4 and H2/CH4 binary gas mixtures with increasing x. By revealing the structural evolution induced by the metal node substitution, we found that the different affinity of Zn/Co metal nodes to gas molecules and the various porosity of the bimetallic ZIF-62 glass membranes are the two main factors contributing to the mixed-metal node effect on the gas separation performance. This work demonstrates that metal node substitution in the MOF structure could be a valuable strategy to tune and improve the gas separation properties of MOF glass membranes. © 2024, The Authors. All rights reserved.

关键词： Organometallics

来源：评论

学校读者我要写书评

暂无评论

A covalent organic polymer-based transistor with multifunctional memory and synaptic functions

引用

Journal of Materials Chemistry C 2023年第4期12卷 1334-1340页

作者： Feng, Zihao Elewa, Ahmed M. Mekhemer, Islam M. A. Niu, Wenbiao Ma, Xin-Qi Jia, Ziqi Zhao, JiYu Han, Su-Ting Chou, Ho-Hsiu Zhou, Ye Institute for Advanced Study Shenzhen University Shenzhen518060 China Nuclear Chemistry Department Egyptian Atomic Energy Authority Cairo13759 Egypt Department of Chemical Engineering National Tsing Hua University Hsinchu300044 Taiwan State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian116024 China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University Hung Hom Hong Kong

Inspired by biological systems that are highly connected and can process massive amounts of data, neuromorphic transistors may overcome the traditional von Neumann bottleneck. In this work, an organic synaptic transistor was fabricated with a covalent organic polymer MT-TP to mimic the behavior of biological synapses. The device exhibits hole trapping/detrapping ability and outstanding stability. The common biological synaptic behaviors were successfully simulated by the MT-TP synaptic transistor. Eventually, an artificial neural network was constructed and the total accuracy for identifying numbers could reach 86.2%. The results demonstrate that the MT-TP based organic synaptic transistor is a good candidate for future computing systems. © 2024 The Royal Society of Chemistry.

关键词： Transistors

来源：评论

学校读者我要写书评

暂无评论

合理设计多电子转移机制实现更好的水系锌-有机电池

引用

Science China Materials 2024年第5期67卷 1367-1378页

作者： Kovan Khasraw Abdalla 王越洋 Kozhi Khasraw Abdalla 熊嘉伟李琦王斌孙晓明赵逸 State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing100029China Department of Biomedical Science Komar University of Science and TechnologySulaimaniyahIraq College of Education University of GeorgiaAthensGA30605USA Minmetals Exploration&Development CO. LTDBeijing100010China Advanced Technology Research Institute Beijing Institute of TechnologyJinan250300China

由于环境相容性好、分子结构可定制和有机物资源丰富等优势,水系锌-有机物电池(AZOBs)成为构建新一代大规模储能系统的关键技术.然而,电导率差、有机物溶解和单一活性基团等问题严重限制了有机物正极材料的倍率性能、稳定性和比容量.因... 详细信息

由于环境相容性好、分子结构可定制和有机物资源丰富等优势,水系锌-有机物电池(AZOBs)成为构建新一代大规模储能系统的关键技术.然而,电导率差、有机物溶解和单一活性基团等问题严重限制了有机物正极材料的倍率性能、稳定性和比容量.因此,具备多氧化还原中心和稳定骨架的有机物正极材料对于实现高性能有机物正极材料至关重要.这些多官能团有机物可协同作用并激发基于多电子转移的氧化还原反应,进而促进H^(+)/Zn^(2+)共嵌以显著提升电池性能.本文探索了多官能团有机物电极的分子结构与其氧化还原反应机理之间的构效关系.本文综述了多官能团有机正极材料在提高氧化还原电位、比容量、动力学以及稳定性等方面面临的挑战和解决策略,为进一步开发先进AZOBs的关键正极材料提供了重要基础.

关键词： aqueous zinc organic battery multifunctional organic cathodes energy storage mechanism molecular structure optimization high performance

来源：评论

学校读者我要写书评

暂无评论

A damping control strategy for torsional oscillations of DFIG-based WTs caused by inertia control

A damping control strategy for torsional oscillations of DFI...

引用

2020 IEEE Power and Energy Society General Meeting, PESGM 2020

作者： Zhang, Xiaojie Hu, Jiabing He, Wei Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9781728155081

As wind power plays an increasingly important role in power systems, the safe and steady operation of wind turbines is causing more attention. The torsional oscillation in doubly fed induction generation based (DFIG-based) wind turbines (WTs) is a serious problem reducing service life of mechanical component. However, as the grid codes require wind farms to participate in frequency response, the application of inertia control may make the issue more significant. This paper presents a damping control strategy for suppressing torsional oscillation of DFIG-based WTs' drive-train caused by the inertia control. Different from the existing damping control schemes, the proposed damping control is based on modulation of reactive current of grid-side converter. This kind of control scheme can effectively restrain torsional oscillation without increasing the complexity of torque control or speed control. Time-domain simulations are performed to demonstrate the efficacy of the proposed control scheme. © 2020 IEEE.

关键词： Wind turbines

来源：评论

学校读者我要写书评

暂无评论

Enhancing energy density of poly(vinylidene fluoride) composite film via addition of N-doped carbon modified boron nitride and sandwich-structural engineering

引用

Applied Surface Science 2023年第1期640卷

作者： Huang, Huabo Mei, Wentao Wang, Yucong Huang, Juan Li, Liang Ji, Jiayou Xiong, Chuanxi Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Key Laboratory for Green Chemical Process of Ministry of Education School of Materials Science and Engineering Wuhan Institute of Technology Wuhan430205 China Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education School of Textile Science and Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

It is a challenge to simultaneously enhance dielectric constant and breakdown strength of dielectrics and achieve a greatly elevated energy density. Herein, polyaniline was first coated onto the surface of boron nitride nanosheets (BN), and then nitrogen-doped carbon (NC) was formed through a carburization process, resulting in BN@NC composite, which was subsequently added to poly(vinylidene fluoride) (PVDF) to prepare a composite film with high dielectric performance. The characterization showed that BN@NC effectively preserved the nanosheet structure of BN and formed strong hydrogen bonding interactions with the PVDF matrix, promoting the β-PVDF formation. This not only improved the compatibility but also enhanced the interfacial polarization between conductive NC and the polymer, leading to a high dielectric constant. Moreover, the electrically insulating BN prevented the formation of leakage current, resulting in a high breakdown strength. Finally, a sandwich-structured film was constructed, and exhibited a dielectric constant of 10.2 (at 1 kHz), a breakdown strength of 380 MV m−1, and an energy density of 6.1 J cm−3, which were 20%, 36%, and 74% higher, respectively, than those of pure PVDF film (8.5, 280 MV m−1, and 3.5 J cm−3). This work highlights significant potential for applications in low-cost and high-energy density dielectric composites. © 2023 Elsevier B.V.

关键词： Boron nitride

来源：评论

学校读者我要写书评

暂无评论

Measurement-based Path Loss Prediction and Analysis in Water Scenarios

Measurement-based Path Loss Prediction and Analysis in Water...

引用

IEEE International Conference on Computational electromagnetics (ICCEM)

作者： Hanpeng Li Xiaomin Chen Hangang Li Jian Ma Xuchao Ye Lixin Song Taotao Zhang Weizhi Zhong Qiuming Zhu College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Nanjing China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System Luoyang China

ISBN: (数字)9798350383317

ISBN: (纸本)9798350383324

Unmanned aerial vehicles (UAVs) have enabled the unmanned management of water areas. Path loss (PL) serves as a critical factor that affects the UAV communication quality. In this work, a PL model for UAV channel in water scenarios is proposed, aiming to explore the multidimensional relationship between transceiver distance, carrier frequency, UAV height, and PL by constructing an Artificial Neural Network (ANN). Moreover, channel measurements are conducted in a river area, and the obtained data are analyzed using the proposed ANN model as well as the close-in (CI) model. The analysis results demonstrates that the PL increases initially and then declines as the UAV height increases. The proposed ANN model has higher prediction accuracy than the classic empirical model, and can achieve precise prediction of the PL in water scenarios.

关键词： Analytical models Accuracy Computational modeling Artificial neural networks Predictive models Autonomous aerial vehicles Data models

来源：评论

学校读者我要写书评

暂无评论

EPICS Based Distributed Beam Optimization Framework in HUSTFEL Control System

EPICS Based Distributed Beam Optimization Framework in HUSTF...

引用

Electrical engineering (CIYCEE), IEEE China International Youth Conference on

作者： Liming Zhong Yanqi Hu Xiude Tu Yongqian Xiong State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781665400657

The compact terahertz free electron laser light source requires high quality of electron beam. For the long time the beam tuning tasks were done by operators manually, however it is challenging for operators to obtain ideal beam quality. Automatic beam tuning methods using optimization algorithms are required. Therefore a software framework, the sequential decision-making framework, has been developed so as to utilize existing tuning methods and newly emerged intelligent control techniques in the accelerator control community. The framework can serve as a platform for the development, test and demonstration of different control algorithms. It can also support normal tasks like automatic emittance measurement and remnant magnetism removal of quadrupoles. Since the completion of the framework, the efficiency of the laboratory operations has been greatly improved.

关键词： Software algorithms Measurement by laser beam Control systems Software Laser beams Laser tuning Task analysis

来源：评论

学校读者我要写书评

暂无评论

A chemically mediated artificial neuron (Sept, 10.1038/s41928-022-00803-0, 2022)

引用

NATURE ELECTRONICS 2022年第9期5卷 622-622页

作者： Wang, Ting Wang, Ming Wang, Jianwu Yang, Le Ren, Xueyang Song, Gang Chen, Shisheng Yuan, Yuehui Liu, Ruiqing Pan, Liang Li, Zheng Leow, Wan Ru Luo, Yifei Ji, Shaobo Cui, Zequn He, Ke Zhang, Feilong Lv, Fengting Tian, Yuanyuan Cai, Kaiyu Yang, Bowen Niu, Jingyi Zou, Haochen Liu, Songrui Xu, Guoliang Fan, Xing Hu, Benhui Loh, Xian Jun Wang, Lianhui Chen, Xiaodong State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications Nanjing China Innovative Center for Flexible Devices (iFLEX) Max Planck–NTU Joint Lab for Artificial Senses School of Materials Science and Engineering Nanyang Technological University Singapore Singapore Frontier Institute of Chip and System Fudan University Shanghai China Institute of Materials Research and Engineering Agency for Science Technology and Research (A*STAR) Singapore Singapore School of Biomedical Engineering and Informatics Nanjing Medical University Nanjing China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing China College of Chemistry University of Chinese Academy of Sciences Beijing China

Brain–machine interfaces typically rely on electrophysiological signals to interpret and transmit neurological information. In biological systems, however, neurotransmitters are chemical-based interneuron messengers. This mismatch can potentially lead to incorrect interpretation of the transmitted neuron information. Here we report a chemically mediated artificial neuron that can receive and release the neurotransmitter dopamine. The artificial neuron detects dopamine using a carbon-based electrochemical sensor and then processes the sensory signals using a memristor with synaptic plasticity, before stimulating dopamine release through a heat-responsive hydrogel. The system responds to dopamine exocytosis from rat pheochromocytoma cells and also releases dopamine to activate pheochromocytoma cells, forming a chemical communication loop similar to interneurons. To illustrate the potential of this approach, we show that the artificial neuron can trigger the controllable movement of a mouse leg and robotic hand.

关键词： Neurons

来源：评论

学校读者我要写书评

暂无评论

Stable perovskite solar cells with efficiency of 22.6%via quinoxaline-based polymeric hole transport material

引用

Science China Chemistry 2021年第11期64卷 2035-2044页

作者： Chenxing Lu Can Zhu Lei Meng Chenkai Sun Wenbin Lai Shucheng Qin Jinyuan Zhang Wenchao Huang Jiaqi Du Yiyang Wang Yongfang Li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing100190China School of Chemical Science University of Chinese Academy of SciencesBeijing100049China College of Chemistry Green Catalysis CenterZhengzhou UniversityZhengzhou450001China Department of Materials Science and Engineering Monash UniversityClaytonVIC3168Australia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan528216China Laboratory of Advanced Optoelectronic Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou215123China

Poor stability of spiro-OMe TAD hole transport materials(HTMs)with dopant is a major obstacle for the commercialization of perovskite solar cells(pero-SCs).Herein,we demonstrate a series of quinoxaline-based D-A copolymers PBQ5,PBQ6 and PBQ10 as the dopant-free polymer HTMs for high performance *** D-A copolymers are composed of fluorothienyl benzodithiophene(BDTT)as D-unit,difluoroquinoxaline(DFQ)with different side chains as A-unit,and thiophene asπ-bridge,where the side chains on the DFQ unit are bi-alkyl for PBQ5,bi-alkyl-fluorothienyl for PBQ6,and alkoxyl for *** the three copolymers are adopted as the dopant-free HTM in the *** planar n-i-p structured pero-SCs based on(FAPb I_(3))_(0.98)(MAPb Br_(3))_(0.02)with PBQ6 HTM demonstrated the high power conversion efficiency(PCE)of 22.6%with Vocof1.13 V and FF of 80.8%,which is benefitted from the suitable energy level and high hole mobility of *** PCE of 22.6%is the highest efficiency reported in the n-i-p structured pero-SCs based on dopant-free D-A copolymer *** addition,the peroSCs show significantly enhanced ambient,thermal and light-soaking stability compared with the devices with traditional spiroOMe TAD HTM.

关键词： perovskite solar cells hole transport materials D-A copolymer difluoroquinoxaline stability

来源：评论

学校读者我要写书评

暂无评论

Yolk-Shell P3-Type K_(0.5)[Mn_(0.85)Ni_(0.1)Co_(0.05)]O_(2):A Low-Cost Cathode for Potassium-Ion Batteries

引用

Energy & Environmental Materials 2022年第1期5卷 261-269页

作者： Jiaxin Hao Ke Xiong Jiang Zhou Apparao M.Rao Xianyou Wang Huan Liu Bingan Lu School of Physics and Electronics State Key Laboratory of Advanced Design and Manufacturing for Vehicle BodyHunan UniversityChangsha 410082China Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education Hunan Province Key Laboratory of Electrochemical Energy Storage and ConversionSchool of ChemistryXiangtan UniversityXiangtan 411105China School of Materials Science and Engineering Central South UniversityChangsha 410083China Department of Physics and Astronomy Clemson Nanomaterials InstituteClemson UniversityClemson SC 29634USA College of Materials Science and Engineering Hunan University of Scienceand TechnologyXiangtan 411201China Fujian Strait Research Institute of Industrial Graphene Technologies Quanzhou 362000China

Low-cost preparation methods for cathodes with high capacity and long cycle life are crucial for commercializing potassium-ion batteries(PIBs).Presently,the charging/discharging strain that develops in the active cathode material of PIBs causes cracks in the particles,leading to a sharp capacity ***,to abate the strain release and the need for an industrially relevant process,a simple low-cost co-precipitation method for synthesizing yolk-shell P3-type K_(0.5)[Mn_(0.85)Ni_(0.1)Co_(0.05)]O_(2) (YS-KMNC)was *** cathode material for PIBs,the YS-KMNC delivers a high reversible capacity(96 mAh g^(-1) at 20 mA g^(-1))and excellent cycle stability(80.5%retention over 400 cycles at a high current density of 200 mA g^(-1)).More importantly,a full battery assembled with the YS-KMNC cathode and a commercial graphite anode exhibits a high operating voltage(0.5-3.4 V)and an excellent cycling performance(84.2%retention for 100 cycles at 100 mA g^(-1)).Considering the low-cost,simple production process and high performance of YS-KMNC cathode,this work could pave the way for the commercial development of PIBs.

关键词： cathode materials K_(0.5)[Mn_(0.85)Ni_(0.1)Co_(0.05)]O_(2) strain release volume expansion yolk-shell structure

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：