检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Zhao, Mingliang Wang, Panpan Bai, Xiaodong Liu, Jian Feng, Wei Li, Jianling State Key Laboratory of Advanced Metallurgy School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing100083 China

All-solid-state batteries (ASSBs) using solid polymer electrolytes (SPEs) show a wide range of prospects in many aspects, but they do not perform well at high current densities. A lot of work is devoted to electrolytes to solve the above problems, but there is a lack of research on binders. This paper emphasizes the critical role played by the binder in the positive plates without any liquid infiltration and an aqueous composite binder (CB) is designed by utilizing the characteristics of polyethylene oxide (PEO) and carboxymethyl cellulose lithium (CMC-Li) in lithium-ions transport. Electrochemical tests and FTIR demonstrate that the two polymers in the CB build a high-speed channel for migrating lithium-ions through synergistic action. This group-rich binder is tested to be highly competitive in both mechanical and electrochemical properties, which creates sufficient conditions for achieving high-performance ASSBs. The cells with CB as the binder are assembled which show a capacity of 65.5 mAh·g-1 at a current density of 3C while PVDF-based ASSBs exhibit only 3.3 mAh·g-1, and exhibit a capacity retention of 86.7% after 700 charge/discharge cycles at 0.5C (for comparison, PVDF-based ASSBs exhibit only 42.5%). This novel composite binder provides guidance for the further development of solid polymer batteries. © 2023, The Authors. All rights reserved.

关键词： Polyethylene oxides

来源：评论

学校读者我要写书评

暂无评论

Research on Artificial Neural Network for Geometric Design and Optimization of Three-Stage Segmented Thermoelectric Generators

SSRN

引用

SSRN 2024年

作者： Zhang, Yin Guo, Kailun Wang, Chenglong Zhang, Jing Wang, Yulu Tian, Wenxi Su, Guanghui Qiu, Suizheng School of Nuclear Science and Technology Shanxi Key Laboratory of Advanced Nuclear Energy and Technology State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi’an710049 China School of Mechatronic Engineering Xianyang Vocational Technical College Xi’an712000 China

More green and environmentally friendly electricity production is the driving force for the development of thermoelectric generators. In addition to high-performance thermoelectric materials, optimizing the geometric shape of thermoelectric generators can also maximize thermoelectric efficiency. This work applies artificial neural networks to the design and optimization of a three-stage segmented thermoelectric generator. After verifying the thermoelectric numerical model of COMSOL, this work generated 3000 sets of simulation data for neural network training. After hyperparameter and particle swarm optimization, the trained neural network can exhibit extremely high prediction accuracy. By coupling the genetic algorithm and artificial fish swarm algorithm, the trained artificial neural network can optimize eight geometric parameters of a three-stage segmented thermoelectric generator under different temperature differences. Compared with COMSOL optimization results, the conversion efficiency optimized by GA has increased by 1.42% and 2.48% in cases 1 and 2, respectively;The conversion efficiency optimized by AFSA has increased by 3.61% and 2.86% in cases 1 and 2, respectively. By obtaining almost identical optimization values, the neural network can achieve geometric design optimization within 5 minutes under different temperature differences. This method provides a new and economical avenue for rapid prediction and design of thermoelectric generators. © 2024, The Authors. All rights reserved.

关键词： Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

A Novel Partial Slot Unwounded Method for electromagnetic Vibration Reduction of Large Electric Machines

A Novel Partial Slot Unwounded Method for Electromagnetic Vi...

引用

International Conference on Electrical Machines and Systems (ICEMS)

作者： Xiaolong Zhao Jianjun Liu Longhui Liu Yong Yang Jian Xiao Wanhai Zhao Haoyu Kang Lu Sun Jin Wang Libing Zhou State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology Wuhan China Dongfang Electric Corporation Dongfang Electric Machinery Co. Ltd Deyang China Nanyang Power Supply Company State Grid Henan Electric Power Company Nanyang China

ISBN: (数字)9784886864406

ISBN: (纸本)9798350379105

A novel winding modification method to reduce the electromagnetic vibration noise for large electric machines is proposed in this paper. First, detailed analytical model is provided for the distribution of air-gap flux density and the radial force density. The main source of electromagnetic vibration is identified through the analytical model and the experimental data. Then, a method based on multi-objective optimization of partial slot unwounded (PSU) is proposed to reduce this electromagnetic force that causes the main vibration. The method is more flexible and provides better vibration reduction than the traditional method of changing the winding coils out of regular belt distribution. Finally, the effectivity of the proposed method is verified by FEM results. The electromagnetic force that causes the main vibration is reduced from 7.6 kN/m 2 to 2.7 kN/m 2 and the amplitude of total vibration is expected to reduced from 21.2mm/s to 8.3mm/s.

关键词： Vibrations Analytical models Electric machines Windings Noise electromagnetic forces Harmonic analysis Finite element analysis electromagnetics Optimization

来源：评论

学校读者我要写书评

暂无评论

Follower Jamming to UAV FH Communication System Based on Simulink

Follower Jamming to UAV FH Communication System Based on Sim...

引用

International Conference on Vacuum Electronics

作者： Junhui Li Chunguang Ma Junyu Zhao Jinghan Zhou Yong Luo School of Electronic Science and Engineering University of Electronic Science and Technology of China Chengdu Sichuan China State Key Laboratory of Electromagnetic Space Cognition and Intelligent Control Technology Beijing China

With the vigorous rise of the unmanned aerial vehicle (UAV) market, the “black flight” of UAVs has seriously threatened public safety, flight safety and even air defense safety. Therefore, the research of anti UAV technology is very urgent. The UAV is mainly equipped with the frequency-hopping (FH) communication system which has a strong anti-jamming capability. This paper establishes the structure diagram of the UAV FH communication system based on Simulink. And then the follower jamming of different power and interference dwell ratio (IDR) are set to interfere with the system respectively. We use the error rate to evaluate the interference effect of the model. The simulation results show that in the case of high jamming to signal ratio (JSR), follower jamming can effectively interfere with the UAV FH communication system.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Scintillation response of Ga2O3 excited by laser accelerated ultra-high dose rate proton beam

arXiv

引用

arXiv 2025年

作者： Liang, Yulan Xu, Tianqi Xu, Shirui Wu, Qingfan Zhang, Chaoyi Chen, Haoran Han, Qihang Hua, Chenhao Xue, Jianming Tang, Huili Liu, Bo Ma, Wenjun State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Beijing100871 China MOE Key Laboratory of Advanced Micro-Structure Materials School of Physics Science and Engineering Tongji University Shanghai200092 China

The temporal and spectral profile of β-Ga2O3 excited by ultra-high dose rate proton beam has been investigated. The unique short bright and broad spectra characteristics of laser-accelerated protons were utilized to investigate the scintillation response difference under different dose rate. Our results indicate that for sufficiently high dose rate delivered, the average decay time of β-Ga2O3 decreases by a factor of two. The overlap of carriers generated by high dose rate protons enhances the nonradiative recombination like Auger recombination and exciton-exciton annihilation which shortens the decay time significantly. The study opens up new avenues for investigating the luminescent properties of other scintillator materials using laser-accelerated high dose rate proton beams. Copyright © 2025, The Authors. All rights reserved.

关键词： Excitons

来源：评论

学校读者我要写书评

暂无评论

Sc-Doping in Na3zr2si2po12 Electrolytes Enable Preeminent Performance of Solid-state Sodium Batteries in a Wide Temperature Range

SSRN

引用

SSRN 2022年

作者： Wang, Qiao Yu, Chuang Li, Liping Liu, Xiaoqing Zhang, Xin Gao, Guichen Wang, Yaowen Li, Guangshe State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun130012 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Hubei Wuhan430000 China

Solid-state sodium batteries (SSSBs) display great potential in scale energy storage for their safety, cost and sustainability. However, it is a great challenge to achieve high ionic conductivity and temperature adaptability for most sodium-ion solid electrolytes. Here, we demonstrate that Sc 3+ -doped Na 3 Zr 2 Si 2 PO 12 (NASICON) is a promising electrolyte for a wide temperature range utilizing in SSSBs from 0 to 50 °C. Optimal Na 3.4 Zr 1.6 Sc 0.4 Si 2 PO 12 shows a superior Na-ion conductivity, up to 1.77×10 -3 S cm -1 at room temperature, and excellent Na metal compatibility, as confirmed by symmetrical cell test. Furthermore, the solid-state sodium battery with the configuration of Na 3 V 2 (PO 4 ) 3 /Na 3.4 Zr 1.6 Sc 0.4 Si 2 PO 12 /Na maintains a discharge capacity of 98.7 mAh g -1 at 1C after 300 cycles at room temperature. Even at 0 °C, the battery still displays a reversible capacity of 99.2 mAh g -1 at 0.1C after 100 cycles. Through the structure analysis and ex-situ and in-situ characterizations, the reasons that dominate the excellent performance of the assembled all-solid-state sodium battery with NASICON electrolytes is revealed. © 2022, The Authors. All rights reserved.

关键词： Solid electrolytes

来源：评论

学校读者我要写书评

暂无评论

Medium and Long-Term Electricity Forecasting Method Based on Solow Model: A Case of Hubei Province 4

Medium and Long-Term Electricity Forecasting Method Based on...

引用

4th IEEE China International Electrical and Energy Conference, CIEEC 2021

作者： Ling, Xu Yu, Haiyang Lou, Suhua Wang, Yuan Xi, Jianghui Ouyang, Litao Central China Branch of State Grid Corporation of China Wuhan China Huazhong University of Science and Technology China-EU Institute for Clean and Renewable Energy Wuhan China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9781728171494

Accurate electricity forecasting is very significant to power system. Modern smart grid has huge data and complex structure, and the nonlinear relationship between influencing factors and electricity demand is complex, random and changeable. Only by making full use of large amounts of data, accurate, stable and reliable medium and long-term electricity prediction can be made. Based on the traditional Solow Model, this paper proposes an Extended Solow Model by analyzing a lot of economic data and extracting key influencing factors. With the real load data of Hubei power grid, the experimental results show that the Extended Solow Model proposed by this paper can effectively improve the forecasting accuracy of 1.40% compared with the traditional Solow Model. © 2021 IEEE.

关键词： Forecasting

来源：评论

学校读者我要写书评

暂无评论

All-weather,natural silent speech recognition via machine-learning-assisted tattoo-like electronics

引用

npj Flexible Electronics 2021年第1期5卷 183-191页

作者： Youhua Wang Tianyi Tang Yin Xu Yunzhao Bai Lang Yin Guang Li Hongmiao Zhang Huicong Liu YongAn Huang State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhanChina Flexible Electronics Research Center Huazhong University of Science and TechnologyWuhanChina School of Mechanical and Electric Engineering Jiangsu Provincial Key Laboratory of Advanced RoboticsSoochow UniversitySuzhouChina State Key Laboratory of Industrial Control Technologyg Institute of Cyber Systems and ControlZhejiang UniversityHangzhouChina

The internal availability of silent speech serves as a translator for people with aphasia and keeps human–machine/human interactions working under various *** paper develops a silent speech strategy to achieve all-weather,natural *** strategy requires few usage specialized skills like sign language but accurately transfers high-capacity information in complicated and changeable daily *** the strategy,the tattoo-like electronics imperceptibly attached on facial skin record high-quality bio-data of various silent speech,and the machine-learning algorithm deployed on the cloud recognizes accurately the silent speech and reduces the weight of the wireless acquisition module.A series of experiments show that the silent speech recognition system(SSRS)can enduringly comply with large deformation(~45%)of faces by virtue of the electricitypreferred tattoo-like electrodes and recognize up to 110 words covering daily vocabularies with a high average accuracy of 92.64%simply by use of small-sample machine *** successfully apply the SSRS to 1-day routine life,including daily greeting,running,dining,manipulating industrial robots in deafening noise,and expressing in darkness,which shows great promotion in real-world applications.

关键词： translator weather silent

来源：评论

学校读者我要写书评

暂无评论

A novel operation principle of air-core pulsed alternators to achieve multiple railgun launches 1

A novel operation principle of air-core pulsed alternators t...

引用

1st IEEE China International Youth Conference on Electrical engineering, CIYCEE 2020

作者： Yu, Kexun Zhu, Hanting Xie, Xianfei Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan CO430074 China

ISBN: (纸本)9781728196596

The pulsed power supply based on air-core pulsed alternator can output a current up to the megampere level in an extremely short time, with outstanding advantages of high energy density, high power density, and high integration degree. It has been a preferred power source for electromagnetic launch (EML) system. To achieve the required amplitude of the output current pulses, the field current of the alternator is often required to be up to tens of thousands ampere level. Therefore, the self-excitation method is often used to achieve the required field current in very short time. How to maintain high field current after the self-excitation process, is the key technology of the air-core pulsed alternator to achieve multiple railgun projectile launches in short time. However, the operation principles already proposed are only suitable to achieve single railgun projectile launch after the field current is built by self-excitation. If multiple railgun projectile launches are required, multiple self-excitations are required, which will not only require long time, but also causes a large amount of losses generated in the field winding. In this paper, a novel operation principle of the EML system, based on the air-core pulsed alternator, to achieve multiple electromagnetic railgun projectile launches after a self-excitation process is introduced. Based on the operation principle above, the changing trend of the field current is modeled and analyzed. Finally, the entire operation process of the EML system is simulated to verify the feasibility of the proposed operation principle. © 2020 IEEE.

关键词： Rail guns

来源：评论

学校读者我要写书评

暂无评论

La-Ca-Co co-doped BaFe12O19 ceramics with tunable magnetic properties for enhanced microwave absorbing application

引用

Ceramics International 2025年

作者： Feng, Gangli Ma, Bo Li, Ning Feng, Junning Zhou, Wancheng School of Materials Science & Engineering North Minzu University Yinchuan China National and Local Joint Engineering Research Center of Advanced Carbon-Based Ceramics Preparation Technology North Minzu University Yinchuan China Key Laboratory of Powders & Advanced Ceramics North Minzu University Yinchuan China State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an China

Single BaFe12O19 material is not suitable for microwave absorption due to its high complex permittivity and impedance mismatch. To address this issue, we enhance the complex permeability to broaden bandwidth and have a good absorption performance by La-Ca-Co co-doped BaFe12O19 ceramics. High-resolution XPS spectra of Co2p in Ba0.8Ca0.2Fe11.4Co0.6O19 indicate that the doped cobalt ions exist mainly in trivalent form in Ba0.8Ca0.2Fe11.4Co0.6O19 ceramics. The bandwidth of the reflection loss (RL) less than −5 dB is 10 GHz for the Ba0.7La0.1Ca0.2Fe11.4Co0.6O19 ceramic at a sample thickness of 1.5 mm was achieved, implying a great potential for practical applications in the electromagnetic (EM) wave absorption. © 2025

关键词： Binary alloys

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：