检索结果-内蒙古大学图书馆

Technology Roadmap for Flexible Sensors

ACS NANO 2023年第6期17卷 5211-5295页

作者： Luo, Yifei Abidian, Mohammad Reza Ahn, Jong-Hyun Akinwande, Deji Andrews, Anne M. Antonietti, Markus Bao, Zhenan Berggren, Magnus Berkey, Christopher A. Bettinger, Christopher John Chen, Jun Chen, Peng Cheng, Wenlong Cheng, Xu Choi, Seon-Jin Chortos, Alex Dagdeviren, Canan Dauskardt, Reinhold H. Di, Chong-an Dickey, Michael D. Duan, Xiangfeng Facchetti, Antonio Fan, Zhiyong Fang, Yin Feng, Jianyou Feng, Xue Gao, Huajian Gao, Wei Gong, Xiwen Guo, Chuan Fei Guo, Xiaojun Hartel, Martin C. He, Zihan Ho, John S. Hu, Youfan Huang, Qiyao Huang, Yu Huo, Fengwei Hussain, Muhammad M. Javey, Ali Jeong, Unyong Jiang, Chen Jiang, Xingyu Kang, Jiheong Karnaushenko, Daniil Khademhosseini, Ali Kim, Dae-Hyeong Kim, Il-Doo Kireev, Dmitry Kong, Lingxuan Lee, Chengkuo Lee, Nae-Eung Lee, Pooi See Lee, Tae-Woo Li, Fengyu Li, Jinxing Liang, Cuiyuan Lim, Chwee Teck Lin, Yuanjing Lipomi, Darren J. Liu, Jia Liu, Kai Liu, Nan Liu, Ren Liu, Yuxin Liu, Yuxuan Liu, Zhiyuan Liu, Zhuangjian Loh, Xian Jun Lu, Nanshu Lv, Zhisheng Magdassi, Shlomo Malliaras, George G. Matsuhisa, Naoji Nathan, Arokia Niu, Simiao Pan, Jieming Pang, Changhyun Pei, Qibing Peng, Huisheng Qi, Dianpeng Ren, Huaying Rogers, John A. Rowe, Aaron Schmidt, Oliver G. Sekitani, Tsuyoshi Seo, Dae-Gyo Shen, Guozhen Sheng, Xing Shi, Qiongfeng Someya, Takao Song, Yanlin Stavrinidou, Eleni Su, Meng Sun, Xuemei Takei, Kuniharu Tao, Xiao-Ming Tee, Benjamin C. K. Thean, Aaron Voon-Yew Trung, Tran Quang Wan, Changjin Wang, Huiliang Wang, Joseph Wang, Ming Wang, Sihong Wang, Ting Wang, Zhong Lin Weiss, Paul S. Wen, Hanqi Xu, Sheng Xu, Tailin Yan, Hongping Yan, Xuzhou Yang, Hui Yang, Le Yang, Shuaijian Yin, Lan Yu, Cunjiang Yu, Guihua Yu, Jing Yu, Shu-Hong Yu, Xinge Zamburg, Evgeny Zhang, Haixia Zhang, Xiangyu Zhang, Xiaosheng Zhang, Xueji Zhang, Yihui Zhang, Yu Zhao, Siyuan Zhao, Xuanhe Zheng, Yuanjin Zheng, Yu-Qing Zheng, Zijian Zhou, Tao Zhu, Bowen Zhu, Ming Zhu, Rong Zhu, Yangzhi Zhu, Yong Zou, Guijin Chen, Xiaodong 08-03 Innovis Singapore 138634 Republic of Singapore Innovative Centre for Flexible Devices (iFLEX) School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore Department of Biomedical Engineering University of Houston Houston Texas 77024 United States School of Electrical and Electronic Engineering Yonsei University Seoul 03722 Republic of Korea Department of Electrical and Computer Engineering The University of Texas at Austin Austin Texas 78712 United States Microelectronics Research Center The University of Texas at Austin Austin Texas 78758 United States Department of Chemistry and Biochemistry California NanoSystems Institute and Department of Psychiatry and Biobehavioral Sciences Semel Institute for Neuroscience and Human Behavior and Hatos Center for Neuropharmacology University of California Los Angeles Los Angeles California 90095 United States Colloid Chemistry Department Max Planck Institute of Colloids and Interfaces 14476 Potsdam Germany Department of Chemical Engineering Stanford University Stanford California 94305 United States Laboratory of Organic Electronics Department of Science and Technology Campus Norrköping Linköping University 83 Linköping Sweden Wallenberg Initiative Materials Science for Sustainability (WISE) and Wallenberg Wood Science Center (WWSC) SE-100 44 Stockholm Sweden Department of Materials Science and Engineering Stanford University Stanford California 94301 United States Department of Biomedical Engineering and Department of Materials Science and Engineering Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States Department of Bioengineering University of California Los Angeles Los Angeles California 90095 United States School of Chemistry Chemical Engineering and Biotechnology Nanyang Technological University Singapore 637457 Singapore Nanobionics Group Department of Chemical and Biological Engineering Monash University Clayton Australia 3800 Monash

Humans rely increasingly on sensors to address grand challenges and to improve quality of life in the era of digitalization and big data. For ubiquitous sensing, flexible sensors are developed to overcome the limitations of conventional rigid counterparts. Despite rapid advancement in bench-side research over the last decade, the market adoption of flexible sensors remains limited. To ease and to expedite their deployment, here, we identify bottlenecks hindering the maturation of flexible sensors and propose promising solutions. We first analyze continued...challenges in achieving satisfactory sensing performance for real-world applications and then summarize issues in compatible sensor-biology interfaces, followed by brief discussions on powering and connecting sensor networks. Issues en route to commercialization and for sustainable growth of the sector are also analyzed, highlighting environmental concerns and emphasizing nontechnical issues such as business, regulatory, and ethical considerations. Additionally, we look at future intelligent flexible sensors. In proposing a comprehensive roadmap, we hope to steer research efforts towards common goals and to guide coordinated development strategies from disparate communities. Through such collaborative

关键词： soft materials mechanics engineering flexible electronics conformable sensors bioelectronics human-machine interfaces body area sensor networks technology translation sustainable electronics

来源：评论

学校读者我要写书评

暂无评论

Social Media Analysis using Sentiment Analysis on COVID-19 from Twitter 6

Social Media Analysis using Sentiment Analysis on COVID-19 f...

引用

6th International Conference on Information Technology, Information Systems and electrical engineering, ICITISEE 2022

作者： Iqbal Maulana, Fairuz Heryadi, Yaya Lukas Suparta, Wayan Arifin, Yulyani Computer Science Department BINUS Graduate Program Computer Science Bina Nusantara University Jakarta11480 Indonesia Faculty of Engineering Jakarta12930 Indonesia Institut Teknologi Nasional Yogyakarta Faculty of Industrial Technology Department of Electrical Engineering Yogyakarta55281 Indonesia Bina Nusantara University School of Computer Science Computer Science Department Jakarta11480 Indonesia

ISBN: (纸本)9798350399615

The development of the internet is getting faster, participating in encouraging the emergence of new and innovative information. In filtering the various information that appears, we need a recommended system to perform well for users in today's internet era. A well-performing recommendation system in question is a reliable recommendation algorithm. This algorithm is fundamental to analyzing various information, such as responses on social media based on user behavior data related to the topic of COVID. This data is crawled from tweets on social media Twitter. The data analysis algorithm obtained uses Python, which is then visualized in the form of a diagram. The processed data is user comments on Twitter, and the text data is analyzed using Python, using more than 60000 data sets taken to form visualizations and conclusions. From sentiment analysis, polarity and subjectivity data are obtained to be analyzed, which are negative, neutral, or positive. The result is show positive tweets with 29.2%, negative tweets is 13%, and 57.8% neutral tweets. Lastly, sentiment analysis can help people effectively infer vast and complex data from social media like Twitter. © 2022 IEEE.

关键词： COVID-19 python sentiment analysis social media twitter

来源：评论

学校读者我要写书评

暂无评论

Soft Magnetic Properties of Amorphous Ring Cores Prepared Via Spark Plasm Sintering Using Fe-Based Amorphous Powders (Fe, Co)68.7(C, Si, B, P)24.5(Mo,Al)6.8

SSRN

引用

SSRN 2024年

作者： Yi, Seonghoon Lee, Jae-Won Kim, Jin-Ah Sohn, In-Joon Yun, Kyyoul Department of Materials Science and Engineering Kyungpook National University Daegu Korea Republic of Department of Electrical Electronic and Computer Engineering Gifu University Gifu Japan

In this study, an Fe-based amorphous alloy (Fe, Co)68.7(C, Si, B, P)24.5(Mo,Al)6.8 with a large supercooled liquid region was developed for fabricating soft magnetic composites utilized in applications involving high-frequency conditions. The alloy was prepared as amorphous ribbons (~25 μm thick) and amorphous rods (Ф3 mm), which were crushed and sieved to form powders with different shapes and particles smaller than 53 μm: amorphous flake powders made from crushed ribbons and amorphous irregular powders made from crushed rods. Additionally, the amorphous flake powder was coated with an amorphous SiO2 layer. Both powders were consolidated via spark plasma sintering into dense ring cores with a relative density exceeding 90%;this high density is attributed to the Newtonian flow within the temperature range of the amorphous powder’s supercooled liquid region. The ring cores remained amorphous even after spark plasma sintering. Excellent soft magnetic properties originating from the amorphous nature and high density of the ring cores were confirmed based on measurements using a vibrating sample magnetometer, a direct current B-H loop tracer, and an alternating current B-H analyzer. Additionally, due to electrical isolation between the powder particles, the eddy current loss of the amorphous ring cores made from the SiO2-coated amorphous flake powder was significantly reduced to 4.86 W/kg (at Bm = 100 mT, 100 kHz). The mechanical hardness of the amorphous ring cores (>690 Hv 0.5) was also observed to be considerably higher than that of commercially available ring cores. These findings verify that the ring cores prepared in this study can be reliable for practical applications involving harsh conditions. © 2024, The Authors. All rights reserved.

关键词： Spark plasma sintering

来源：评论

学校读者我要写书评

暂无评论

Dopant Mapping of Partially Hydrogenated Vanadium Dioxide using the Energy Loss Near Edge Structure Technique

引用

Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada 2023年第1期29卷 1667-1668页

作者： Pofelski, A. Deng, S. Yu, H. Park, T.J. Jia, H. Manna, S. Chan, M.K.Y. Sankaranarayanan, S K Rs Ramanathan, S. Zhu, Y. Condensed Matter Physics and Materials Science Department Brookhaven National Laboratory Upton NY United States School of Materials Engineering Purdue University West Lafayette IN United States Center for Nanoscale Materials Argonne National Laboratory Lemont IL United States Department of Mechanical and Industrial Engineering University of Illinois Chicago IL United States Department of Electrical and Computer Engineering Rutgers State University of New Jersey Piscataway NJ United States

来源：评论

学校读者我要写书评

暂无评论

Adaptable physics-based super-resolution for electron backscatter diffraction maps

引用

npj Computational materials 2022年第1期8卷 2444-2452页

作者： Devendra K.Jangid Neal R.Brodnik Michael G.Goebel Amil Khan SaiSidharth Majeti McLean P.Echlin Samantha H.Daly Tresa M.Pollock B.S.Manjunath Electrical and Computer Engineering University California Santa BarbaraSanta Barbara93106-5050CAUSA Mechanical Engineering University California Santa BarbaraSanta Barbara93106-5050CAUSA Computer Science University California Santa BarbaraSanta Barbara93106-5050CAUSA Materials Department University California Santa BarbaraSanta Barbara93106-5050CAUSA

In computer vision,single-image super-resolution(SISR)has been extensively explored using convolutional neural networks(CNNs)on optical images,but images outside this domain,such as those from scientific experiments,are not well *** data is often gathered using non-optical methods,which alters the metrics for image *** such example is electron backscatter diffraction(EBSD),a materials characterization technique that maps crystal arrangement in solid materials,which provides insight into processing,structure,and property *** present a broadly adaptable approach for applying state-of-art SISR networks to generate super-resolved EBSD orientation *** approach includes quaternion-based orientation recognition,loss functions that consider rotational effects and crystallographic symmetry,and an inference pipeline to convert network output into established visualization formats for EBSD *** ability to generate physically accurate,high-resolution EBSD maps with super-resolution enables high-throughput characterization and broadens the capture capabilities for three-dimensional experimental EBSD datasets.

关键词： maps resolution networks

来源：评论

学校读者我要写书评

暂无评论

MnBi IPMSM and PMASynRM Torque Density Limitations due to Temperature-Dependent Demagnetization

MnBi IPMSM and PMASynRM Torque Density Limitations due to Te...

引用

IEEE Energy Conversion Congress and Exposition, ECCE

作者： Ryan Brody Paul Ohodnicki Brandon Grainger Department of Electrical and Computer Engineering University of Pittsburgh Pittsburgh PA USA Department of Mechanical Engineering and Materials Science University of Pittsburgh Pittsburgh PA USA

ISBN: (数字)9798350376067

ISBN: (纸本)9798350376074

Permanent magnets (PM) demagnetization occurs when applying external fields opposite the PM’s polarity. To a certain degree, this effect is reversible and useful in high-speed permanent magnet synchronous motors (PMSMs) by enabling flux weakening control and reluctance torque. However, relatively large external fields cause irreversible demagnetization, damaging the magnet and, thus, the motor. In PMSMs, irreversible demagnetization can significantly limit torque density, especially when using rare earth (RE) free PMs with low coercivity. Irreversible demagnetization risk can be controlled in motor designs to increase torque density if the motor drive is designed appropriately, but the impact of this relationship has yet to be quantified statistically. Therefore, this paper does so by designing and comparing PMSMs with varying demagnetization risk and comparing their performance in terms of torque density and short circuit current. The motor designs presented here are based on the specifications for the 2011 Nissan Leaf, and electric vehicles (EVs) contribute significantly to RE PM demand by typically using interior permanent magnet motors (IPMSMs) with RE PMs. Therefore, the authors also assess demagnetization risk during EV drive cycles for the MnBi motor designs presented here. Because demagnetization effects are particularly limiting in permanent magnet assisted synchronous reluctance motors (PMASynRM) that use MnBi PMs, this paper focuses on various MnBi PMASynRM designs and compare them to a MnBi IPMSM design previously published by the authors.

关键词： Temperature dependence Temperature distribution Torque Short-circuit currents Magnetomechanical effects Permanent magnet motors Permanent magnets Topology Demagnetization Reluctance motors

来源：评论

学校读者我要写书评

暂无评论

Seatbelt-Embroidered Metamaterials for In-Vehicle Vital Sign Monitoring

Seatbelt-Embroidered Metamaterials for In-Vehicle Vital Sign...

引用

2023 IEEE/MTT-S International Microwave Symposium, IMS 2023

作者： Zeng, Qihang Tian, Xi Nguyen, Dat T. Yang, Xin Chia, Patrick Wu, Changsheng Ho, John S. National University of Singapore Department of Electrical and Computer Engineering Singapore National University of Singapore SIA-NUS Digital Aviation Corporate Laboratory Singapore National University of Singapore Integrative Sciences & Engineering NUS Graduate School Singapore National University of Singapore Department of Materials Science and Engineering Singapore

ISBN: (纸本)9798350347647

Continuous in-vehicle physiological monitoring can improve safety through early detection of driver fatigue and drowsiness. However, developing a system capable of effective and robust physiological monitoring in practical driving scenarios is challenging due to the noisy vehicular environment in which the sensor is exposed to engine vibrations, unpredictable road conditions and random body motions. In this work, we introduce a seatbelt-integrated metamaterial sensor for unobtrusive and continuous in-vehicle respiration and heartbeat monitoring. The metamaterial sensor is fabricated by digital embroidery of conductive threads and can continuously monitor respiration and heartbeat in a contactless manner. Our sensor supports confined microwave surface waves that are modulated by subtle local physiological motions, which are sensitively transduced into changes in the phase of the transmitted signal. We developed an algorithm based on variational mode decomposition (VMD) for noise-robust extraction of respiration and heart rate. We experimentally demonstrate the embroidered metamaterial in real-life driving scenarios and show accurate heartbeat detection with a median inter-beat interval (IBI) detection error of 23.5 ms during driving. Our results highlight the potential of embroidered metamaterial sensors in driver physiological monitoring applications, especially for the unobtrusive detection of fatigue and drowsiness. © 2023 IEEE.

关键词： Surface waves

来源：评论

学校读者我要写书评

暂无评论

13 GHz Acoustic Resonator with Q of 600 in High-Quality Thin-Film Aluminum Nitride

13 GHz Acoustic Resonator with Q of 600 in High-Quality Thin...

引用

IEEE International Symposium on Applications of Ferroelectrics (ISAF)

作者： Sinwoo Cho Omar A. Barrera Hrithik Agrawal Michael Liao Ellie Y. Wang Vakhtang Chulukhadze Jack Kramer Joshua Campbell Tzu-Hsuan Hsu Ian Anderson Mark S. Goorsky Ruochen Lu Department of Electrical and Computer Engineering The University of Texas Austin TX US Department of Materials Science & Engineering University of California Los Angeles CA US

ISBN: (数字)9798350371901

ISBN: (纸本)9798350371918

This study reports a high-quality thin-film aluminum nitride (AlN) acoustic Lamb wave resonator (LWR) with a compact size and low-loss operation. The device is composed of 60 nm thick Al electrodes on the top of 200 nm thick plasma vapor deposition (PVD) AlN film. The design and stack of the resonator are selected for leveraging of Ku-band operation (12-18 GHz) with top electrodes of wavelengths (λ, 0.5-0.8 µm). Specifically, λ of 0.8 µm implements a 13.0 GHz resonator with a record-breaking Q p_3dB of 600, enabled by fundamental symmetric (S0) mode surpassing prior works. The results highlight the potential for the effectiveness of the new stack and optimized resonator design in Ku-band. Further study will be focused on identifying and minimizing the dominant loss.

关键词： Electrodes Performance evaluation Electric potential Resonant frequency Ku-band Acoustics Plasmas III-V semiconductor materials Frequency control Aluminum nitride

来源：评论

学校读者我要写书评

暂无评论

Information Rates Over DMCs with Many Independent Views

Information Rates Over DMCs with Many Independent Views

引用

IEEE International Symposium on Information Theory

作者： V. Arvind Rameshwar Nir Weinberger IUDX Program Unit Indian Institute of Science Bengaluru India Department of Electrical and Computer Engineering Technion Haifa Israel

ISBN: (数字)9798350382846

ISBN: (纸本)9798350382853

In this paper, we investigate the fundamental limits of reliable communication over a discrete memoryless channel (DMC) when there are a large number of noisy views of a transmitted symbol, i.e., when several copies of a single symbol are sent independently through the DMC. We argue that the channel capacity and dispersion of such a multi-view DMC converge exponentially quickly in the number of views to to the entropy and varentropy of the input distribution, respectively, and identify the exact rate of convergence. This rate equals the smallest Chernoff information between two conditional distributions of the output given unequal inputs. Our results hence help us characterize the largest finite-blocklength rates achievable for any fixed error probability. We also present a new channel model that we call the Poisson approximation channel-of possible independent interest-whose capacity closely approximates the capacity of the multi-view binary symmetric channel (BSC).

关键词： Monte Carlo methods Error probability Symbols Entropy Memoryless systems Reliability Noise measurement

来源：评论

学校读者我要写书评

暂无评论

A Study on the Performance Improvement of Axial Flux Permanent Magnet Machines Based on Stator Slot Design with Semi-Closed Slots or Magnetic Wedges

A Study on the Performance Improvement of Axial Flux Permane...

引用

IEEE Transportation Electrification Conference and Expo (ITEC)

作者： Jangho Yun Brandon Grainger Paul Ohodnicki Department of Mechanical Engineering and Materials Science University of Pittsburgh Pittsburgh PA USA Department of Electrical and Computer Engineering University of Pittsburgh Pittsburgh PA USA

ISBN: (数字)9798350317664

ISBN: (纸本)9798350317671

The most important specifications for electric propulsion systems are torque, efficiency, and constant power speed range (CPSR). Axial flux permanent magnet (AFPM) machines suitable for applications that require compact design and high-power density are difficult to manufacture and assemble compared to radial flux permanent magnet (RFPM) machines. In this paper, the effects of stator semi-closed slots and magnetic wedges on performance are analyzed. The inner stator dual sided rotor and inner rotor dual sided stator geometries, which are mainly utilized in electric vehicle systems, were created based on the 3-D finite element analysis (FEA) model. FEA results show that the stator slot design increases output power by 8% in the inner rotor dual sided stator motor and increases efficiency by 8.3% in the inner stator dual sided rotor motor compared to open slots. The results show that semi-closed slots and magnetic wedges have a significant impact on the performance of AFPM machines and must be considered for design optimization.

关键词： Geometry Magnetic flux Torque Rotors Stators Motors Permanent magnets

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：