检索结果-内蒙古大学图书馆

CLEO: Science and Innovations in CLEO 2024, CLEO: S and I 2024 - Part of Conference on Lasers and Electro-Optics

作者： Kudelin, Igor Groman, William Ji, Qing-Xin Guo, Joel Kelleher, Megan Lee, Dahyeon Nakamura, Takuma McLemore, Charles A. Shirmohammadi, Pedram Hanifi, Samin Cheng, Haotian Jin, Naijun Wu, Lue Halladay, Samuel Luo, Yizhi Dai, Zhaowei Jin, Warren Bai, Junwu Liu, Yifan Zhang, Wei Xiang, Chao Chang, Lin Iltchenko, Vladimir Miller, Owen Matsko, Andrey Bowers, Steven M. Rakich, Peter T. Campbell, Joe Bowers, John Vahala, Kerry Quinlan, Franklyn Diddams, Scott A. Department of Physics University of Colorado BoulderCO United States Time and Frequency Division National Institute of Standards and Technology BoulderCO United States T.J. Watson Laboratory of Applied Physics California Institute of Technology PasadenaCA United States Department of Electrical and Computer Engineering University of California Santa BarbaraCA United States Electrical and Computer Engineering University of Virginia CharlottesvilleVA United States Department of Applied Physics Yale University New HavenCT United States Jet Propulsion Laboratory California Institute of Technology PasadenaCA United States Department of Electrical Computer and Energy Engineering University of Colorado BoulderCO United States

Using integrated photonic chip components for'2-point' optical frequency division, we generate a 20 GHz microwave signal with phase noise of −135 dBc/Hz at 10 kHz offset. © Optica Publishing Group 2024

关键词： Photonic integrated circuits

来源：评论

学校读者我要写书评

暂无评论

High-throughput study of the anomalous Hall effect

引用

npj Computational Materials 2023年第1期9卷 767-774页

作者： JakubŽelezný Yuta Yahagi Carles Gomez-Olivella Yang Zhang Yan Sun Institute of Physics Czech Academy of SciencesCukrovarnická1016200 Praha 6Czech Republic Department of Applied Physics Tohoku UniversitySendaiMiyagiJapan Department of Physics and Astronomy University of Tennessee KnoxvilleKnoxvilleTN 37996USA Min H.Kao Department of Electrical Engineering and Computer Science University of TennesseeKnoxvilleTN 37996USA Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Despite its long history,the anomalous Hall continues to attract attention due to its complex origins,its connection to topology,and its use as a probe of magnetic *** this work we investigate the anomalous Hall effect in 2871 ferromagnetic materials using an automatic high-throughput calculation *** analyze general properties of the effect,such as its reliance on spin-orbit coupling strength and *** materials with the largest anomalous Hall effect,we find that symmetry-protected band degeneracies in the non-relativistic electronic structure,such as mirror symmetry-protected nodal lines,are typically responsible for the large ***,we examine the dependence of the anomalous Hall effect on magnetization direction and demonstrate deviations from the commonly assumed expression j^(AHE)~M×E.

关键词： effect symmetry protected

来源：评论

学校读者我要写书评

暂无评论

High-quality Mid-infrared Chalcogenide Ring Resonator

High-quality Mid-infrared Chalcogenide Ring Resonator

引用

2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Lu, Bright Xu, Bo Krueper, Greg Zohrabi, Mo Gopinath, Juliet T. Park, Wounjhang Department of Electrical Computer and Energy Engineering University of Colorado BoulderCO80309 United States Department of Physics University of Colorado BoulderCO80309 United States Materials Science and Engineering Program University of Colorado BoulderCO80309 United States

ISBN: (纸本)9781957171395

We report Ge23Sb7S70 chalcogenide ring resonators with up to 8 × 104 quality factors operating around 3.6 µm wavelength fabricated through e-beam lithography. Their rib waveguide geometry can be engineered to support close-to-zero dispersion modes needed for mid-infrared microcomb generation. CLEO 2024 © Optica Publishing Group 2024 © 2024 The Author(s)

关键词： Ring lasers

来源：评论

学校读者我要写书评

暂无评论

High-quality Mid-infrared Chalcogenide Ring Resonator

High-quality Mid-infrared Chalcogenide Ring Resonator

引用

CLEO: Science and Innovations in CLEO 2024, CLEO: S and I 2024 - Part of Conference on Lasers and Electro-Optics

关键词： Infrared devices

来源：评论

学校读者我要写书评

暂无评论

Comparative Evaluation between Accelerated RISC- V and ARM AI Inference Machines 6

Comparative Evaluation between Accelerated RISC- V and ARM A...

引用

6th World Symposium on Communication engineering, WSCE 2023

作者： Christofas, Vasileios Amanatidis, Petros Karampatzakis, Dimitris Lagkas, Thomas Goudos, Sotirios K. Psannis, Konstantinos E. Sarigiannidis, Panagiotis International Hellenic University Department of Computer Science Kavala Greece Aristotle University of Thessaloniki Department of Physics Thessaloniki Greece University of Macedonia Department of Applied Informatics Thessaloniki Greece University of Western Macedonia Department of Electrical and Computer Engineering Kozani Greece

ISBN: (纸本)9798350339505

Embedded AI development has been rapidly im-proving for the past few years and has had a great impact on edge AI networks. However, as neural networks become deeper and deeper it becomes more difficult to execute complicated tasks without sacrificing a good amount of power and performance. In this paper, we make a comparative evaluation between two AI acceleration devices. The first one features a RISC- V 64-bit processor while the other one is ARM powered. These devices are combined with AI co-processors, or ASICs, with computer vision capabilities. Our benchmark consists of a simple classification task split into multiple versions. The results showed that the RISC- V inference machine had 4 times lower consumption while the ARM machine was up to 15 times faster in our largest network. We discuss the results in great detail while keeping our focus on all aspects equally. Finally, we make recommendations based on their usage and application. © 2023 IEEE.

关键词： computer vision

来源：评论

学校读者我要写书评

暂无评论

Solar radiation estimation on a tilted surface using sky models in the Afar region of Ethiopia

引用

Frontiers in Energy Research 2025年 13卷

作者： Alemu, Anshebo Getachew Anshebo, Teketel Alemu Dessie, Bizuayehu Bogale Department of Physics Samara University of Applied Science Samara Ethiopia Department of Chemical Engineering Wachamo University Hossana Ethiopia Department Electrical and Computer Engineering Samara University of Applied Science Samara Ethiopia

The aim of this study is to estimate solar radiation on an inclined surface using sky models. Two anisotropic (direction dependent) and two isotropic (independent of direction) sky models were used for 12.11°N (latitude) and 40.63°E (longitude) in the Afar region of Ethiopia. The sky model outputs were compared to sample statistical test data from the Ethiopian Meteorological Institute and found to exceed expectations in all cases. We found that the Hay and Davies model predicted the highest incident solar radiation throughout the year. Finally, the model that we propose for estimation of solar radiation events on a tilted surface is the Liu and Jordan (LJ) isotropic model, which has the fewest statistical errors out of all the models evaluated in this study and shows good agreement with the estimated data. Copyright © 2025 Alemu, Anshebo and Dessie.

关键词： Incident solar radiation

来源：评论

学校读者我要写书评

暂无评论

Stroboscopic x-ray diffraction microscopy of dynamic strain in diamond thin-film bulk acoustic resonators for quantum control of nitrogen-vacancy centers

引用

Physical Review applied 2024年第2期22卷 024016-024016页

作者： Anthony D’Addario Johnathan Kuan Noah F. Opondo Ozan Erturk Tao Zhou Sunil A. Bhave Martin V. Holt Gregory D. Fuchs Department of Physics Elmore Family School of Electrical and Computer Engineering Center for Nanoscale Materials School of Applied and Engineering Physics Kavli Institute at Cornell for Nanoscale Science Ithaca New York USA

Bulk-mode acoustic waves in a crystalline material exert lattice strain through the thickness of the sample, which couples to the spin Hamiltonian of defect-based qubits such as the nitrogen-vacancy (N-V) center defect in diamond. This mechanism has previously been harnessed for unconventional quantum spin control, spin decoherence protection, and quantum sensing. Bulk-mode acoustic wave devices are also important in the microelectronics industry as microwave filters. A key challenge in both applications is a lack of appropriate operando microscopy tools for quantifying and visualizing gigahertz-frequency dynamic strain. In this work, we directly image acoustic strain within N-V center-coupled diamond thin-film bulk acoustic wave resonators using stroboscopic scanning hard x-ray diffraction microscopy at the Advanced Photon Source. The far-field scattering patterns of the nanofocused x-ray diffraction encode strain information entirely through the illuminated thickness of the resonator. These patterns have a real-space spatial variation that is consistent with the bulk strain’s expected modal distribution and a momentum-space angular variation from which the strain amplitude can be quantitatively deduced. We also perform optical measurements of strain-driven Rabi precession of of the N-V center spin ensemble, providing an additional quantitative measurement of the strain amplitude. As a result, we directly measure one of the six N-V spin-stress coupling parameters, b=2.73(2) MHz/GPa, by correlating these measurements at the same spatial position and applied microwave power. Our results demonstrate a unique technique for directly imaging ac lattice strain in micromechanical structures and provide a direct measurement of a fundamental constant for the N-V center defect spin Hamiltonian.

关键词： Quantum control Spin dynamics Strain Stress Micromechanical devices Nitrogen vacancy centers in diamond Acoustic techniques X-ray diffraction

来源：评论

学校读者我要写书评

暂无评论

Nonreciprocal Thermal Emission based on Space-Time Modulation of Graphene

Nonreciprocal Thermal Emission based on Space-Time Modulatio...

引用

2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Ghanekar, Alok Wang, Jiahui Guo, Cheng Fan, Shanhui Povinelli, Michelle L. Ming Hsieh Department of Electrical and Computer Engineering University of Southern California Los Angeles90089 United States Department of Applied Physics Stanford University StanfordCA94305 United States Department of Electrical Engineering Stanford University StanfordCA94305 United States

We present a non-reciprocal thermal emitter based on the dynamic space-time modulation of graphene. Compound symmetry in the system gives rise to a new dimension of tunable thermal emission in non-reciprocal systems. ... 详细信息

ISBN: (纸本)9781957171258

关键词： Graphene

来源：评论

学校读者我要写书评

暂无评论

Control of Magnetic Skyrmions in an Exchange Biased van der Waals Ferromagnet

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 1710-1711页

作者： McCray, Arthur R C Lebedev, Dmitry Arpaci, Sevdenur Te Velthuis, Suzanne G E Lopez-Dominguez, Victor Amiri, Pedram Khalili Hersam, Mark C. Petford-Long, Amanda K. Phatak, Charudatta Materials Science Division Argonne National Laboratory Lemont IL United States Applied Physics Program Northwestern University Evanston IL United States Department of Materials Science and Engineering Northwestern University Evanston IL United States Department of Electrical and Computer Engineering Northwestern University Evanston IL United States

来源：评论

学校读者我要写书评

暂无评论

Design of A Rotated 3D-Printed Lens Antenna Assembly with An Ultra-Wideband Antenna for Beam Steering Applications 12

Design of A Rotated 3D-Printed Lens Antenna Assembly with An...

引用

12th International electrical engineering Congress, iEECON 2024

作者： Sangpet, Patchadaporn Thaiwirot, Wanwisa Akkaraekthalin, Prayoot Chudpooti, Nonchanutt King Mongkut's University Of Technology North Bangkok Bangkok Faculty Of Engineering Department Of Electrical And Computer Engineering Bangkok Thailand King Mongkut's University Of Technology North Bangkok Bangkok Faculty Of Applied Science Department Of Industrial Physics And Medical Instrumentation Bangkok Thailand

ISBN: (纸本)9798350383591

The paper presents the rotated 3D-printed dielectric lens assembly with an ultra-wideband (UWB) antenna for use in the beam-steering applications. The focus is on achieving beam steering by combining the rotated 3D-printed dielectric lens assembly with a hemispherical lens and UWB antenna. The UWB antenna is fabricated on an FR-4 substrate, while the hemispherical lens and the rotated 3D-printed lens assembly are made from Acrylonitrile Butadiene Styrene (ABS). To enable the hemispherical lens to rotate to the specified angle, a set of rotatable 3D-printed lenses was etched to determine five angles: -60degrees, -30degrees, 0degrees, 30degrees, and 60degrees. Both simulation and measurement results indicate that at a beginning frequency of 3.5 GHz, the beam cannot be steered when using the UWB antenna with the 3D-printed ABS lens rotated hemispherical lens assembly. However, at middle and high frequencies of 7.0 GHz and 10.0 GHz, respectively, the beam can be steered according to the direction of rotation of the hemispherical lens. © 2024 IEEE.

关键词： Microstrip antennas

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：