检索结果-内蒙古大学图书馆

arXiv 2019年

作者： An, Sensong Fowler, Clayton Zheng, Bowen Shalaginov, Mikhail Y. Tang, Hong Li, Hang Zhou, Li Ding, Jun Agarwal, Anuradha Murthy Rivero-Baleine, Clara Richardson, Kathleen A. Gu, Tian Hu, Juejun Zhang, Hualiang Department of Electrical & Computer Engineering University of Massachusetts Lowell LowellMA United States Department of Materials Science & Engineering Massachusetts Institute of Technology CambridgeMA United States Shanghai Key Laboratory of Multidimensional Information Processing East China Normal University Shanghai China Lockheed Martin Corporation OrlandoFL United States CREOL University of Central Florida OrlandoFL United States

Metasurfaces have become a promising means for manipulating optical wavefronts in flat and high-performance optical devices. Conventional metasurface device design relies on trial-and-error methods to obtain target electromagnetic (EM) response, an approach that demands significant efforts to investigate the enormous number of possible meta-atom structures. In this paper, a deep neural network approach is introduced that significantly improves on both speed and accuracy compared to techniques currently used to assemble metasurface-based devices. Our neural network approach overcomes three key challenges that have limited previous neural-network-based design schemes: input/output vector dimensional mismatch, accurate EM-wave phase prediction, as well as adaptation to 3-D dielectric structures, and can be generically applied to a wide variety of metasurface device designs across the entire electromagnetic spectrum. Using this new methodology, examples of neural networks capable of producing on-demand designs for meta-atoms, metasurface filters, and phase-change reconfigurable metasurfaces are demonstrated. Copyright © 2019, The Authors. All rights reserved.

关键词： Deep neural networks

来源：评论

学校读者我要写书评

暂无评论

Corrigendum to “X-ray photoelectron spectroscopy investigation of the valence band offset at beryllium oxide-diamond interfaces” [Diam. Relat. Mater. 101 (2020) 107647–7]

引用

Diamond and Related materials 2021年 111卷

作者： Donghyi Koh Todd W. Hudnall Christopher W. Bielawski Sanjay K. Banerjee Justin Brockman Markus Kuhn Sean W. King Microelectronics Research Center Department of Electrical and Computer Engineering University of Texas at Austin 10100 Burnet Road Austin TX 78758 United States of America Department of Chemistry and Biochemistry Texas State University San Marcos TX 78666 United States of America Center for Multidimensional Carbon Materials (CMCM) Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea Department of Chemistry Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea Department of Energy Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea Logic Technology Development Intel Corporation Hillsboro OR 97124 United States of America

来源：评论

学校读者我要写书评

暂无评论

Polar Polarization Mode and Average Radical Flux Intensity Measurements Based on All Optical Spatial Communication Systems

引用

Journal of Optical Communications 2019年第s1期45卷 s53-s61页

作者： Amiri, I.S. Rashed, Ahmed Nabih Zaki Jahan, Sohely Paul, Bikash Kumar Ahmed, Kawsar Computational Optics Research Group Advanced Institute of Materials Science Ton Duc Thang University Ho Chi Minh City700000 Viet Nam Faculty of Applied Sciences Ton Duc Thang University Ho Chi Minh City Viet Nam Faculty of Electronic Engineering Electronics and Electrical Communications Engineering Department Menoufia University Menouf Menoufia32951 Egypt Department of Computer Science and Engineering University of Barisal Kornokathi Barisal8200 Bangladesh Ashulia Savar1342 Bangladesh Department of Information and Communication Technology Mawlana Bhashani Science and Technology University Santosh Tangail1902 Bangladesh Group of Bio-photomatiχ Mawlana Bhashani Science and Technology University Santosh Tangail1902 Bangladesh

This study presents the polar polarization mode and average radical intensity flux distribution measurements based on all optical spatial communication systems. The numerical technique that is applied with the simulation model is the diffraction fast Fourier integral transform. Spatial optical sources are used such as continuous wave (CW) laser and vertical cavity surface-emitting laser (VCSEL) with spatial connector and spatial aperture. Spatial temporal polarization effects are taken into account. Percentage encircled flux/average flux radical intensity and polar radical polarization are measured with spatial connector distance and spatial aperture width. The encircled flux is constant at 95% of its value in the case of VCSEL laser source at a radical distance of exactly 10 μm. However, the encircled flux is constant at 92 %of its value in the case of CW laser source at a radical distance of exactly 6 μm. It is noticed that the encircled flux increases with increasing radial distance of spatial apertures that are used with two suggested light sources. The encircled flux is constant at 93 % of its value in the case of VCSEL laser source at a radical distance of exactly 10 μm. © 2019 Walter de Gruyter GmbH, Berlin/Boston.

关键词： Surface emitting lasers

来源：评论

学校读者我要写书评

暂无评论

A novel CAD system for detecting acute rejection of renal allografts based on integrating imaging-markers and laboratory biomarkers

A novel CAD system for detecting acute rejection of renal al...

引用

2018 IEEE International Conference on Imaging Systems and Techniques, IST 2018

作者： Shehata, Mohamed Ghazal, Mohammed Khalifa, Fahmi El-Ghar, Mohamed Abou Khalil, Ashraf Dwyer, Amy C. El-Giziri, Ahmed El-Melegy, Moumen El-Baz, Ayman BioImaging Lab University of Louisville LouisvilleKY40292 United States Electrical and Computer Engineering Department Abu Dhabi University Abu Dhabi United Arab Emirates Radiology Department Urology and Nephrology Center University of Mansoura Mansoura35516 Egypt Computer Science and Information Technology Department Abu Dhabi University Abu Dhabi United Arab Emirates Kidney Disease Program University of Louisville LouisvilleKY40202 United States Department of Electrical Engineering Assiut University Assiut71516 Egypt

ISBN: (纸本)9781538666289

The goal of this paper is to determine the parameters that are correlated with the biopsy diagnosis of acute renal rejection (AR) post-transplantation, using laboratory biomarkers and (3D+-value) diffusion weighted MR (DW-MR) image-markers. 16 patients with non-rejection (NR) and 45 patients with AR renal allografts determined by their renal biopsy as a gold standard were included. All kidneys were evaluated using both laboratory biomarkers (e.g., creatinine clearance (CrCl) and serum creatinine (SCr)) and DW-MR image-markers. To extract the latter, DW-MR kidney images were first segmented using a geometric deformable model, then, DW-MR image-markers known as apparent diffusion coefficients (ADCs), were estimated for segmented kidneys at multiple b-values (i.e. strength and timing, of, the, field, gradients, (b50,b 100,...,b 1000 s/mm2)). A statistical analysis investigating possible correlations between potential biomarkers of AR and the biopsy diagnosis was firstly performed. Two categories of parameters were mainly examined: (i) laboratory biomarkers (CrCl and SCr) and (ii) the average ADC (aADC) at individual b-values. Analysis of Variance(ANOVA) and the likelihood ratio (χ2) tests found that both CrCl and SCr affected significantly the likelihood of AR, as did the aADC for the individual b-values of b 100, b 500, b 600, b 700, and b 900s/mm2. Nevertheless, patient demographics (i.e. age and sex) and the aADC at the remaining b-values had no significant effect. The statistical analysis results encouraged us to investigate if this can lead to building a computer-aided diagnostic (CAD) system with the ability to classify AR from NR renal allografts. To achieve this goal, stacked auto-encoders (SAEs) based on deep learning approach were trained using the fusion of the statistically significant DW-MR image-markers and laboratory biomarkers for the classification purposes. Preliminary results obtained (92% accuracy, 92% sensitivity, and 94% specificity) hold a lot of

关键词： Creatinine

来源：评论

学校读者我要写书评

暂无评论

Stepwise-Nanocavity-Assisted Transmissive Color Filter Array Microprints

引用

Research 2018年第1期2018卷 34-43页

作者： Yasi Wang Mengjie Zheng Qifeng Ruan Yanming Zhou Yiqin Chen Peng Dai Zhengmei Yang Zihao Lin Yuxiang Long Ying Li Na Liu Cheng-Wei Qiu Joel K.W.Yang Huigao Duan State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China School of Physics and Electronics Hunan UniversityChangsha 410082China SZU-NUS Collaborative Innovation Center for Optoelectronic Science&Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationCollege of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Department of Electrical and Computer Engineering National University of Singapore4 Engineering Drive 3Singapore 117583Singapore Engineering Product Development Pillar Singapore University of Technology and Design8 Somapah RoadSingapore 487372Singapore Kirchhof Institute for Physics University of HeidelbergIm Neuenheimer Feld 22769120 HeidelbergGermany

Visible-light color flters using patterned nanostructures have attracted much interest due to their various advantages such as compactness,enhanced stability,and environmental friendliness compared with traditional pigment or dye-based optical *** most existing studies are based on planar nanostructures with lateral variation in size,shape,and arrangement,the vertical dimension of structures is a long-ignored degree of freedom for the structural ***,we demonstrate a synthetic platform for transmissive color flter array by coordinated manipulations between height-varying nanocavities and their lateral flling *** thickness variation of those nanocavities has been fully deployed as an alternative degree of freedom,yielding vivid colors with wide gamut and excellent *** results show that the color-rendering capability of the pixelated nanocavities can be still retained as pixels are miniaturized to 500 *** between closely spaced pixels of a Bayer color flter arrangement was calculated,showing minimal crosstalk for 1μm2 square *** work provides an approach to designing and fabricating ultracompact color flter arrays for various potential applications including stained-glass microprints,microspectrometers,and high-resolution image sensing systems.

关键词： arrangement rendering cavity

来源：评论

学校读者我要写书评

暂无评论

electrical Stimulation in Combating Pressure Ulcer for Immobilize Subjects: A Conceptual Framework

引用

Journal of Physics: Conference Series 2019年第1期1372卷

作者： Amelia Wong Azman Rashidah Funke Olanrewaju Fajingbesi, Fawwaz Eniola Ahmad, Zuraida Yasir Mohd Mustafah Nur Azah Hamzaid Department of Electrical and Computer Engineering Department of Electrical and Computer Engineering Department of Physics Electronics and Earth Science Fountain University Osogbo Nigeria Department of Manufacturing and Materials Engineering Department of Mechatronics Engineering International Islamic University Malaysia Department of Biomedical Engineering Faculty of Engineering University Malaya

A paradigm shift in health system did intensify the need for research on wearable electronics. There are numerous reasons that could lead to skin ulcers. The most common are lesion due to constant pressure, incontinence control, excessive humidity and postural changes. Over the years, there have been numerous interventions ranging from specific skin treatment, introducing prevention programs as well as to mechanical intervention. On the rise in such clinical rehabilitation program is the use of electrical stimulation (ES) at a therapeutic level, wound care and muscle function restoration. This paper presents a concept development and implementation process of a new pressure ulcer intervention system which can be used for both chairbound and bedridden patients. The concept here is to integrate the use of electrical stimulation, interface pressure mapping and redistribution with antimicrobial protection not only to act as therapeutic but at the same time as a means of prevention of pressure ulcers by improving muscle tone and decreasing atrophy among immobilized subjects.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A potential neurophysiological correlate of electric-acoustic pitch matching in adult cochlear implant users: Pilot data

引用

Cochlear Implants International 2018年第4期19卷 198-209页

作者： Tan, Chin-Tuan Martin, Brett A. Svirsky, Mario A. Department of Electrical and Computer Engineering School of Behavioral and Brain Science (Callier Center for Communication Disorders) University of Texas at Dallas Richardson TX United States Program in Speech-Language-Hearing Sciences and Program in Audiology Graduate Center City University of New York New York NY United States Department of Otolaryngology New York University New York NY United States

The overall goal of this study was to identify an objective physiological correlate of electric-acoustic pitch matching in unilaterally implanted cochlear implant (CI) participants with residual hearing in the non-implanted ear. electrical and acoustic stimuli were presented in a continuously alternating fashion across ears. The acoustic stimulus and the electrical stimulus were either matched or mismatched in pitch. Auditory evoked potentials were obtained from nine CI users. Results indicated that N1 latency was stimulus-dependent, decreasing when the acoustic frequency of the tone presented to the non-implanted ear was increased. More importantly, there was an additional decrease in N1 latency in the pitch-matched condition. These results indicate the potential utility of N1 latency as an index of pitch matching in CI users. © 2018 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Auditory evoked potential Electric-acoustic pitch matching N1 latency

来源：评论

学校读者我要写书评

暂无评论

Realization of 2D crystalline metal nitrides via selective atomic substitution

arXiv

引用

arXiv 2019年

作者： Cao, Jun Li, Tianshu Gao, Hongze Lin, Yuxuan Wang, Xingzhi Wang, Haozhe Palacios, Tomás Ling, Xi Department of Chemistry Boston University 590 Commonwealth Avenue BostonMA02215 United States Division of Materials Science and Engineering Boston University 15 St. Marys Street BostonMA02215 United States Photonics Center Boston University 8 St. Marys Street BostonMA02215 United States Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States

Two-dimensional (2D) transition metal nitrides (TMNs) are new members in the 2D materials family with a wide range of applications. Particularly, highly crystalline and large area thin films of TMNs are potentially promising for applications in electronic and optoelectronic devices;however, the synthesis of such TMNs has not yet been achieved. Here, we report the synthesis of few-nanometer thin Mo5N6 crystals with large area and high quality via in situ chemical conversion of layered Mo5N2crystals. The structure and quality of the ultrathin Mo5N6 crystal are confirmed using transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. The large lateral dimensions of Mo5N6crystals are inherited from the Mo5N2crystals that are used for the conversion. Atomic force microscopy characterization reveals the thickness of Mo5N6crystals is reduced to about 1/3 of the MoS2 crystal. electrical measurements show the obtained Mo5N6 samples are metallic with high electrical conductivity (∼ 100 ω sq-1), which is comparable to graphene. The versatility of this general approach is demonstrated by expanding the method to synthesize W5N6and TiN. Our strategy offers a new direction for preparing 2D TMNs with desirable characteristics, opening a door for studying fundamental physics and facilitating the development of next generation electronics. Copyright © 2019, The Authors. All rights reserved.

关键词： Molybdenum compounds

来源：评论

学校读者我要写书评

暂无评论

A Reliable Double-Sided 1200-V/600-A Multichip Half-bridge Insulated Gate Bipolar Transistor (IGBT) Module with High Power Density

A Reliable Double-Sided 1200-V/600-A Multichip Half-bridge I...

引用

Workshop on Wide Bandgap Power Devices and Applications in Asia (WiPDA Asia)

作者： Zheng Wang Yunhui Mei Wen Liu Yijing Xie Shancan Fu Xin Li Guo-Quan Lu Tianjin Key Laboratory of Advanced Joining Technology School of Materials Science and Engineering Tianjin University Tianjin China Department of Materials Science and Engineering and the Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA

ISBN: (纸本)9781538643938

A double-sided 1200-V/600-A multichip half-bridge insulated gate bipolar transistor (IGBT) module is successfully fabricated utilizing nanosilver paste as die attachment. The module consists of eight IGBT chips and eight diodes with extremely high power density. The dimension of this module is only 70 mm $\times 59$ mm $\times 3.48$ mm with a maximum power density as high as 5. $01 \times 10^{4} \mathrm{k}\mathrm{W}/\mathrm{L}$, which is more than 9 times higher than the power density of a commercial wire-bonding one. Thermal properties and electrical properties of the double-sided module are also characterized. In order to use the module with such high power density, double-sided cooling is suggested. No degradation of the power devices proved that the way to double-sided packaging power devices could be used for future manufacturing of high power density power module.

关键词： Insulated gate bipolar transistors Density measurement Power system measurements Inductance Substrates Heating systems Packaging

来源：评论

学校读者我要写书评

暂无评论

An electrochemical thermal transistor

arXiv

引用

arXiv 2019年

作者： Sood, Aditya Xiong, Feng Chen, Shunda Wang, Haotian Selli, Daniele Zhang, Jinsong McClellan, Connor J. Sun, Jie Donadio, Davide Cui, Yi Pop, Eric Goodson, Kenneth E. Department of Materials Science and Engineering Stanford University StanfordCA94305 United States Department of Mechanical Engineering Stanford University StanfordCA94305 United States Department of Electrical Engineering Stanford University StanfordCA94305 United States Department of Chemistry University of California DavisCA95616 United States Max Planck Institute for Polymer Research Ackermannweg 10 MainzD-55128 Germany Ikerbasque Basque Foundation for Science BilbaoE-48011 Spain Stanford Institute for Materials and Energy Science SLAC National Accelerator Laboratory Menlo ParkCA94025 United States Precourt Institute for Energy Stanford University StanfordCA94305 United States Department of Electrical and Computer Engineering University of Pittsburgh PittsburghPA15261 United States Department of Chemical and Biomolecular Engineering Rice University HoustonTX77005 United States Dipartimento di Scienza dei Materiali Universita di Milano-Bicocca Milano20125 Italy School of Chemical Engineering and Technology Tianjin University Tianjin300350 China

The ability to actively regulate heat flow at the nanoscale could be a game changer for applications in thermal management and energy harvesting. Such a breakthrough could also enable the control of heat flow using thermal circuits, in a manner analogous to electronic circuits. Here we demonstrate switchable thermal transistors with an order of magnitude thermal on/off ratio, based on reversible electrochemical lithium intercalation in MoS2 thin films. We use spatially-resolved time-domain thermoreflectance to map the lithium ion distribution during device operation, and atomic force microscopy to show that the lithiated state correlates with increased thickness and surface roughness. First principles calculations reveal that the thermal conductance modulation is due to phonon scattering by lithium rattler modes, c-axis strain, and stacking disorder. This study lays the foundation for electrochemically-driven nanoscale thermal regulators, and establishes thermal metrology as a useful probe of spatio-temporal intercalant dynamics in nanomaterials. Copyright © 2019, The Authors. All rights reserved.

关键词： Layered semiconductors

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：