检索结果-内蒙古大学图书馆

5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Wu, Zhicheng Zhu, Junjie Sun, Xingfa Han, Yi Xu, Jin Yuan, Jingxin Naval University of Engineering National Key Laboratory of Science and Technology on Vessel Integrated Power System Wuhan China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

When hybrid energy storage technology is applied in different occasions, there are key problems in topology design and configuration optimization. For electromagnetic emission application scenarios with strict volume-weight constraints and large power-energy requirements, a hybrid energy storage group chopper discharge topology is designed, and its working principle and operation boundary are introduced. Then, taking the single maximum power demand, continuous maximum energy demand and multiple constraints of the transmitting load as the design input, the optimal con-figuration of supercapacitor and lithium battery is carried out. Taking the weight, volume and cost as the comprehensive optimization objectives, iterative approximation is carried out, and finally the optimal configuration solution of the hybrid energy storage system is obtained. The effectiveness of the topology is verified by simulation. © 2022 IEEE.

关键词： Choppers (circuits)

来源：评论

学校读者我要写书评

暂无评论

Manipulating Electromagnetic Absorption and Heat Transfer Simultaneously

Manipulating Electromagnetic Absorption and Heat Transfer Si...

引用

2024 Photonics and Electromagnetics Research Symposium, PIERS 2024

作者： Wang, Y. Han, T.C. Liang, D.F. Deng, L.J. University of Electronic Science and Technology of China National Engineering Research Center of Electromagnetic Radiation Control Materials Chengdu611731 China University of Electronic Science and Technology of China Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of Education Chengdu611731 China

ISBN: (纸本)9798350375909

This study proposes a scheme of periodically filling BN pillars within the absorbing material, which can simultaneously realize the wave-absorbing and thermal conductivity performance through a reasonable radius design. In order to enhance the feasibility of the scheme, we added 0.1 mm BN films to the upper and lower surfaces of the composite structure, which can achieve effective absorbing performance. Additionally, we evaluated the thermal performance of the composite structure under different heat dissipation boundaries, and the results indicate that the composite structure achieves a significant temperature reduction under forced convection conditions, providing a feasible scheme for simultaneously realizing both the function of absorption and thermal conductivity. © 2024 IEEE.

关键词： Thermal conductivity

来源：评论

学校读者我要写书评

暂无评论

Multi-physics Analysis of a Rasorber

Multi-physics Analysis of a Rasorber

引用

2024 Photonics and Electromagnetics Research Symposium, PIERS 2024

作者： Wen, K.H. Xie, H.Y. Yue, X.L. Xie, M.T. Han, T.C. University of Electronic Science and Technology of China National Engineering Research Center of Electromagnetic Radiation Control Materials Chengdu611731 China University of Electronic Science and Technology of China Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of Education Chengdu611731 China

ISBN: (纸本)9798350375909

The electromagnetic-thermal effects of a sandwich-structured rasorber for high-power microwave (HPM) systems is simulated and analyzed. Both of electromagnetic and thermal characteristics are obtained in the multi-field module of simulation software CST. The rasorber is configured by cascading a lossy layer above a lossless layer with an air to separate them, which has a -10 dB reflection reduction ranging from 5.4 to 14.8 GHz and a transmission window with an insertion loss of 0.34 dB at 10 GHz when the loss tangent of substrate material is fixed as 0 to achieve high-efficiency transmission. The temperature focuses mainly on the area where the electric field intensity is maximum for both lossy layer and lossless, and the peak temperature is greater in the former than in the latter. With the increase of slot width of Jerusalem cross-slot from 0.1 to 0.6 mm in the lossless layer, the stable temperature can drop from 144.2°C to 101.1°C. A novel phenomenon was found in the curves of the transient peak temperature versus time with the variation of incident angles under TE and TM polarization. This work provides a new insight for FSRs, indicting the potential possibility for conformal applications under modern high-power array antennas systems, which can be used for the evaluation between electromagnetic and thermal properties. © 2024 IEEE.

关键词： Antenna arrays

来源：评论

学校读者我要写书评

暂无评论

Perovskite films with gradient bandgap for self-powered multiband photodetectors and spectrometers

引用

Nano Research 2023年第7期16卷 10256-10262页

作者： Chuantian Zuo Lixiu Zhang Xiyan Pan He Tian keyou Yan Yuanhang Cheng Zhiwen Jin Chenyi Yi Xiaoliang Zhang Wu-Qiang Wu Qinye Bao Liyuan Han Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China School of Physics and Electronic Science East China Normal UniversityShanghai 200241China School of Integrated Circuits Tsinghua UniversityBeijing 100084China School of Environment and Energy South China University of TechnologyGuangzhou 510000China School of New Energy Nanjing University of Science and TechnologyJiangyin 214443China School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China State Key Laboratory of Power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084China School of Materials Science and Engineering Beihang UniversityBeijing 100191China School of Chemistry Sun Yat-sen UniversityGuangzhou 510006China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Semiconductor Materials Science Beijing Key Laboratory of Low Dimensional Semiconductor Materials and DevicesInstitute of SemiconductorsChinese Academy of SciencesBeijing 100083China

Bandgap-graded materials present varying spectral responses at different positions,making them possible to be used as an alternative to photoactive materials array in multi-spectral responsive devices,thus miniaturizing the ***,the preparation of bandgap-graded materials usually requires complicated deposition *** we report a facile lowtemperature solution process to make films with lateral bandgap gradients,which form spontaneously via self-spreading and interdiffusion of *** show lead halide perovskite films with MAPbCl_(3)-MAPbBr_(3)and MAPbBr_(3)-MAPbI_(3)gradients,which exhibit light absorption onsets ranging from 410 to 781 *** bandgap-graded films were used to make self-powered multiband photodetectors,which show different spectral responses at different positions without applying bias ***,self-powered spectrometers were made by using the multiband photodetectors.

关键词： self-spreading interdiffusion bandgap-graded perovskite multiband photodetectors self-powered spectrometers

来源：评论

学校读者我要写书评

暂无评论

Precise orbit determination for Tianwen-1 during mapping phase

引用

Astrodynamics 2024年第3期8卷 471-481页

作者： Shanhong Liu Jing Kong Jianfeng Cao Hao Huang Haijun Man Jianguo Yan Xie Li National Key Laboratory of Science and Technology on Aerospace Flight Dynamics Beijing100094China Beijing Aerospace Control Center Beijing100094China Institute for Frontiers in Astronomy and Astrophysics Bejing Normal UniversityBeijing100875China Astronomy Department Bejing Normal UniversityBeijing100875China State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhan430079China

The mapping phase is a key stage of the Tianwen-1 orbiter. It has the longest exploration time and gathers abundant radio tracking data via the Chinese deep space network. Thus, it also provides opportunities for radio science research topics such as the Mars gravity field model, ephemeris, and radio occultation experiments. At this stage, the need for imaging takes the highest priority, leading to frequent attitude adjustments for the spacecraft, which presents challenges for Precise Orbit Determination (POD). To improve the accuracy of the spacecraft’s orbit, this study analyzes the effects of arc length, the empirical acceleration, and the solar radiation pressure parameters on POD, considering the limited number of radio tracking observations. For one-day arcs, the POD is not able to adequately account for wheel off-loading and a few unknown forces with limited observations, but reasonable fitting is performed for the wheel off-loading occurring during tracking periods or the gap between two tracking periods. When extending the POD arc to three days, the estimated empirical acceleration can be well-fitted and reflects the aggregation feature, but the solar radiation pressure parameter has little impact on POD results. The root mean square of two-way range-rate residuals after POD is about 0.18-0.35 mm/s;the orbital position accuracy of 60% of the arcs is better than 100 m.

关键词： empirical acceleration mapping phase precise orbit determination(POD) radio science

来源：评论

学校读者我要写书评

暂无评论

Dielectric breakdown properties of Al-air mixtures

引用

Plasma science and technology 2021年第5期23卷 59-65页

作者： Xiyuan CAI Xiao ZHANG Junyong LU Sai TAN Yongsheng ZHANG Guanxiang ZHANG National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of EngineeringWuhan 430033People's Republic of China

In order to investigate the influence of aluminum vapor on the breakdown performance of air,this paper makes a study of the dielectric breakdown characteristics of Al-air mixture in the temperature range of 300-5000 K at atmospheric pressure.A Boltzmann analysis method is used to deal with the electron energy distribution function(EEDF),the reduced ionization coefficients(α/N),the reduced attachment coefficients(η/N)and the critical reduced breakdown strength((E/N)cr)so as to explore the influence of temperature and mixing ratio on the dielectric breakdown *** the temperature range of 300-2000 K,the property of the mixture is mainly determined by the mixing proportion of aluminum vapor because the composition of particles remains *** the temperature range of 2000-2500 K,the decomposition of Al2O_(2)leads to the increase of aluminum oxides and NO,and a rise in the percentage of highenergy electrons as well as the increment ofα/***,the joint action of O_(2)and NO makesη/N increase first and then decrease,and(E/N)crgoes down to a smaller temperature *** increase in the proportion of aluminum vapor causes(E/N)crto decrease in the low-temperature region and to increase in the high-temperature region,which will reduce the transition between these two temperature regions.

关键词： aluminum vapor arc discharges Boltzmann analysis dielectric properties electromagnetic rail launch muzzle arc

来源：评论

学校读者我要写书评

暂无评论

Interference Cancellation and Iterative Multi-User Detection for Satellite OTFS-NOMA Networks 22

Interference Cancellation and Iterative Multi-User Detection...

引用

22nd International Conference on Optical Communications and Networks, ICOCN 2024

作者： Sun, Meng Zhang, Qi Xin, Xiangjun Chai, Furong Li, Yuanfeng Wang, Yanxiang Zhao, Yi Tian, Feng Tian, Qinghua Wang, Yongjun Beijing100876 China Beijing Key Laboratory of Space-round Interconnection and Convergence Beijing100876 China National University of Defense Technology Science and Technology on Information Systems Engineering Laboratory Changsha410073 China School of Information and Electronics Beijing Institute of Technology Beijing100081 China Beijing Institute of Control and Electronic Technology Beijing100038 China

An iterative multiuser detection based on channel matched filtering and interference cancellation is proposed for satellite-terrestrial OTFS-NOMA systems. Simulation results demonstrate that our algorithm effectively ... 详细信息

ISBN: (纸本)9798350367652

关键词： Multiuser detection

来源：评论

学校读者我要写书评

暂无评论

Antibacterial activities of a novel Cu-bearing high-entropy alloy against multi-drug-resistant Acinetobacter baumannii and Staphylococcus aureus

引用

Rare Metals 2022年第2期41卷 570-579页

作者： En-Ze Zhou Guang-Yu Ren Yun-Ling Sun Yong-Qiang Fan Yi Yang Ming-Yue Sun Da-Ke Xu Yi-Ping Lu Jian-Jun Wang Hua-Bing Li Fu-Hui Wang Shenyang National Laboratory for Materials Science Key Laboratory for Anisotrotropy and Texture of Materials(Ministry of Education)School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China General Hospital of Northern Theater Command Shenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

Acinetobacter baumannii and methicillin-resistant Staphylococcus aureus(MRSA)are two prevalent pathogens and have developed high resistant to most ***,it is a pressing need to develop a new method to inhibit the spread of drug-resistant *** containing high-entropy alloy(HEA,Al0.4CoCr-CuFeNi)is a new kind of alloy material,which shows extensive antibacterial activity and mechanical properties in our previous *** study further develops another HEA(CoCrCuFeNi)and evaluates its resistance against gram-negative *** and Gram-positive *** antibacterial tests show that the antibacterial rate of the HEA toward both bacteria reached nearly 99%,far better than the traditional copper-bearing 304 stainless steel(304 Cu-SS).The biofilm observation shows that the HEA could not only kill the planktonic bacteria,but also effectively inhibit the formation of *** data demonstrate that CoCrCuFeNi HEA possesses effective antibacterial and antibiofilm activities,making it a potential candidate for using in hospital,food industry,and domestic kitchens.

关键词： High-entropy alloy Acinetobacter baumannii Methicillin-resistant Staphylococcus aureus(MRSA) Antibacterial activity Antibiofilm activity

来源：评论

学校读者我要写书评

暂无评论

Research on active arc-ignition technology as a possible residual-energy-release strategy in electromagnetic rail launch

引用

Plasma science and technology 2021年第8期23卷 167-174页

作者： Xiyuan CAI Sai TAN Junyong LU Xiao ZHANG Yun GUO National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of EngineeringWuhan 430033People's Republic of China

In order to solve the problem of the original residual energy release strategy being unsuitable for high-energy and fast-firing electromagnetic rail launch,this work has explored the applicability of active arc-ignition technology(AAT).The results obtained from the comparison of launching experiments show that AAT has no influence on the acceleration of the armature and is capable of quickly releasing the residual *** on the theory of magnetohydrodynamics,this work has also made numerical simulation of the muzzle arc,analyzed the influence of AAT on the muzzle arc flow field,electromagnetic(EM)field and temperature field,and evaluated the performance of AAT according to the projectile initial disturbance,the EM impact on guidance devices and the rail *** results show that AAT is now one of the most practicable strategies for residual energy release.

关键词： muzzle arc initial disturbance guidance device arc ablation backflow

来源：评论

学校读者我要写书评

暂无评论

Long-term and short-term plasticity independently mimicked in highly reliable Ru-doped Ge_(2)Sb_(2)Te_(5) electronic synapses

引用

InfoMat 2024年第8期6卷 85-96页

作者： Qiang Wang Yachuan Wang Yankun Wang Luyue Jiang Jinyan Zhao Zhitang Song Jinshun Bi Libo Zhao Zhuangde Jiang Jutta Schwarzkopf Shengli Wu Bin Zhang Wei Ren Sannian Song Gang Niu State Key Laboratory for Manufacturing Systems Engineering Electronic Materials Research LaboratoryKey Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringXi'an Jiaotong UniversityXi'anthe People's Republic of China School of Integrated Circuits Peking UniversityBeijingthe People's Republic of China Beijing Microelectronics Technology Institute Beijingthe People's Republic of China National Key Laboratory of Human-Machine Hybrid Augmented Intelligence National Engineering Research Center for Visual information and Applicationsand School of SoftwareXi'an Jiaotong UniversityXi'anthe People's Republic of China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghaithe People's Republic of China Key Laboratory of Microelectronics Device and Integrated Technology The Institute of Microelectronics of Chinese Academy of SciencesBeijingthe People's Republic of China University of Chinese Academy of Sciences Beijingthe People's Republic of China The State Key Laboratory for Manufacturing Systems Engineering&The International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology Xi'an Jiaotong UniversityXi'anthe People's Republic of China Leibniz-Institut für Kristallzüchtung Max-Born-Straße 2BerlinGermany Key Laboratory of Physical Electronics and Devices Ministry of EducationSchool of Electronic Science and EngineeringXi'an Jiaotong UniversityXi'anthe People's Republic of China The International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology Xi'an Jiaotong UniversityXi'anthe People's Republic of China

In order to fulfill the complex cognitive behaviors in neuromorphic systems with reduced peripheral circuits,the reliable electronic synapses mimicked by single device that achieves diverse long-term and short-term plasticity are *** change random access memory(PCRAM)is of great potential for artificial synapses,which faces,however,difficulty to realize short-term plasticity due to the long-lasting resistance *** work reports the ruthenium-doped Ge_(2)Sb_(2)Te_(5)(RuGST)based PCRAM,demonstrating a series of synaptic behaviors of short-term potentiation,pair-pulse facilitation,longterm depression,and short-term plasticity in the same single *** optimized RuGST electronic synapse with the high transformation temperature of hexagonal phase>380C,the outstanding endurance>108 cycles,the low resistance drift factor of 0.092,as well as the extremely high linearity with correlation coefficients of 0.999 and 0.976 in parts of potentiation and *** investigations also go insight to mechanisms of Ru doping according to thorough microstructure characterization,revealing that Ru dopant is able to enter GST lattices thus changing and stabilizing atomic arrangement of *** leads to the short-term plasticity realized by RuGST ***,the proposed RuGST electronic synapses performs a high accuracy of94.1%in a task of image recognition of CIFAR-100 database using ResNet *** work promotes the development of PCRAM platforms for large-scale neuromorphic systems.

关键词： electronic synapses neuromorphic computing PCRAM Ru-doped Ge_(2)Sb_(2)Te_(5)

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：