检索结果-内蒙古大学图书馆

Next-Generation Optical Communication: Components, Sub-Systems, and Systems XIV 2025

作者： Christofidis, Christos Vrachatis, Dimitrios Tsakalis, Georgios Moschopoulos, Konstantinos Nazarathy, Moshe Tomkos, Ioannis OCSN Laboratory University of Patras Patras264442 Greece Dept. of Electrical and Computer Engineering Technion Israel

ISBN: (纸本)9781510684966

State-of-the-art optical transceivers are limited by DAC driver performance degradation at ultra-high data rates. To enable enhanced data rates in short-reach coherent communication, there is a growing need for energy-efficient, compact, low-loss, highly linear broadband modulators capable of generating higher-order formats such as QAM-m. Conventional MZM optical output suffers from modulation loss and nonlinear constellation distortion due to its nonlinear transfer characteristic and electronic driver noise. An emerging optical Digital-to-Analog Converter (oDAC) structure for generating PAM and QAM signals of any order mitigates conventional MZM limitations by nesting two or more MZMs in parallel, each driven by lower-order NRZ or PAM4 signals. To further improve oDAC performance, implementing modulators with enhanced linearity and other beneficial qualities in its parallel paths would be advantageous. Following this approach, we introduce and analyze a Ring-Assisted Mach-Zehnder Interferometer (RAMZI) optical DAC structure (RAMZI-oDAC), leveraging its ultra-linear and controllable transfer characteristics. The RAMZI-oDAC can be optimally tuned to generate signal constellations with reduced distortion while suppressing electronic driver noise. We present an analysis of the RAMZI-oDAC field transfer characteristic in lightly/strong Under/Over-Coupling (UC/OC) operating regimes. The proposed RAMZI-oDAC design demonstrates a 2 dB improvement in EVM compared to a single RAMZI at 50 Gbaud, extending also the supported baudrate to 90Gbaud. © 2025 SPIE.

关键词： Light modulation

来源：评论

学校读者我要写书评

暂无评论

Reliability Measures in Neutrosophic Soft Graphs

引用

Neutrosophic Sets and Systems 2022年 49卷 239-252页

作者： Anirudh, A. Kannan, R. Aravind Sriganesh, R. Sundareswaran, R. Kumar, S. Sampath Shanmugapriya, M. Broumi, Said Dept. of Computer Science Sri Sivasubramaniya Nadar College of Engineering India Dept. of Electrical and Electronics Engineering. Sri Sivasubramaniya Nadar College of Engineering India Dept. of Mathematics Sri Sivasubramaniya Nadar College of Engineering India Laboratory of Information Processing Faculty of Science Ben M'Sik University Hassan II B.P 7955 Sidi Othman Casablanca Morocco

This paper introduces the concept of reliable nodes in neutrosophic soft graphs by evaluating path-based parameters. A reliable node is defined as one which is least susceptible to changes that are quantized by the indeterminacy and falsity values in a neutrosophic tuple. A new path measure called farness and three novel reliability measures which make use of the same are presented. Farness is defined in terms of a novel score function. The first, proximity reliability of a node, computes the farness of a node to its neighbours. The second, intermediate reliability of a node, computes the fraction of paths of minimal farness that pass through it. The third, crisis reliability of a node, is a hybrid of the two previously defined. It considers the farness of a node to its neighbours taking into account the farness of the neighbours to other nodes in the graph. © 2022. All Rights Reserved.

关键词： Reliability

来源：评论

学校读者我要写书评

暂无评论

Uncommon Conductors and Dielectrics for Wearable Applications

Uncommon Conductors and Dielectrics for Wearable Application...

引用

Antennas and Propagation & USNC/URSI National Radio Science Meeting

作者： Allyanna Rice Asimina Kiourti Dept. of Electrical and Computer Engineering ElectroScience Laboratory The Ohio State University Columbus OH USA

ISBN: (数字)9798350369908

ISBN: (纸本)9798350369915

Recent advances in materials science and additive manufacturing have facilitated the development of new conductors and dielectrics for radio frequency (RF) devices. Wearable technology is well positioned to benefit from alternative materials because devices must be conformal, lightweight, portable, and sometimes stretchable. This paper provides a summary of emerging stretchable conductors and engineered dielectrics with a focus on material characteristics and fabrication methods for wearable applications. In particular, stretchable conductors and engineered dielectrics have emerged as promising elements for novel RF sensors and antennas. Stretchable conductors can be fabricated from conductive threads (for easy integration into clothing) or liquid metals (for maximizing stretch potential). Dielectrics with high permittivities and additively manufactured lenses can improve the performance of antennas placed on or near the tissues. In the future, these uncommon conductors and dielectrics may find applications in several fields, beyond wearables.

关键词： Radio frequency Performance evaluation Fabrication Liquids Metals Conductors Three-dimensional printing

来源：评论

学校读者我要写书评

暂无评论

Fusion of Parameterized and Physics-oriented Statistical Surrogate Models for EM Coupling on Wires in Complex Electronic Enclosures

Fusion of Parameterized and Physics-oriented Statistical Sur...

引用

2024 IEEE International Symposium on Electromagnetic Compatibility, Signal and Power Integrity, EMC+SIPI 2024

作者： Lin, Shen Luo, Sangrui Shao, Yang Peng, Zhen Addissie, Bisrat D. Drikas, Zachary B. University of Illinois at Urbana-Champaign Dept. Electrical and Computer Engineering UrbanaIL61801 United States U.S. Naval Research Laboratory Tactical Electronic Warfare Division WashingtonDC20375 United States

ISBN: (纸本)9798350360394

In this paper, we explore a novel approach in the domain of statistical electromagnetics for high-frequency coupling on wires installed in complex electronic enclosures. The study involves the integration of two distinct types of statistical surrogate models: parameterized models, which are based on predefined parameter spaces for internal wire/cable components, and physics-oriented statistical models, which leverage statistical representations of cavity eigenfunctions and eigenvalues. The fusion of parameterized and physics-oriented statistical surrogate models allows for a comprehensive and versatile statistical analysis, accommodating the complex details and variability present in real-world electronic systems. The proposed work has been validated numerically, including the commercial software and traditional Monte Carlo simulation. © 2024 IEEE.

关键词： Gaussian distribution

来源：评论

学校读者我要写书评

暂无评论

A Theoretical Model for Finite-Element Magnetoinductive Waveguides

A Theoretical Model for Finite-Element Magnetoinductive Wave...

引用

US National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM)

作者： Samuel Coogle Connor Jenkins Asimina Kiourti Dept. of Electrical and Computer Engineering ElectroScience Laboratory The Ohio State University Columbus OH USA

In this work, we present an alternative method for modeling finite-element magnetoinductive waveguides (MIWs) based on an equivalent circuit derivation. The proposed method provides practical insight into the behavior and operation of finite MIWs that cannot be fully explained using the dispersion model currently dominating MIW analysis, such as passband ripples. The model shows excellent agreement with simulated and experimental results when compared with first-order dispersion relation analysis and demonstrates the ability to predict behavior under complex MIW structures, such as junctions. To our knowledge, this is the first time that the equivalent circuit model presented in this work has been used to analyze MIW behavior and performance.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A Dual-Band Leaky Wave Antenna Design for K-Band and W-Band

A Dual-Band Leaky Wave Antenna Design for K-Band and W-Band

引用

2024 IEEE Research and Applications of Photonics in Defense Conference, RAPID 2024

作者： Willis, Andrew Zhang, Jincheng Louisos, Dustin Hofmann, Tino Touma, Jimmy E. University of North Carolina at Charlotte Electrical and Computer Engineering Dept. CharlotteNC28025 United States University of North Carolina at Charlotte Dept. of Physics and Optical Science CharlotteNC28025 United States Air Force Research Laboratory Eglin AFBFL32542 United States

A bi-directional dual-band meta-surface antenna designed to operate at 20 GHz in the longitudinal direction and 80 GHz in the transverse direction is described and simulation results are presented. © 2024 IEEE.

ISBN: (纸本)9798350373097

关键词： Microwave antennas

来源：评论

学校读者我要写书评

暂无评论

Self-Focused Pulse Propagation Is Mediated by Spatiotemporal Optical Vortices

引用

Physical Review Letters 2024年第5期133卷 053803-053803页

作者： M. S. Le G. A. Hine A. Goffin J. P. Palastro H. M. Milchberg Institute for Research in Electronics and Applied Physics Dept. of Physics Oak Ridge Tennessee 37831 USA Dept. of Electrical and Computer Engineering Laboratory for Laser Energetics Rochester New York 14623 USA

We show that the dynamics of high-intensity laser pulses undergoing self-focused propagation in a nonlinear medium can be understood in terms of the topological constraints imposed by the formation and evolution of spatiotemporal optical vortices (STOVs). STOVs are born from pointlike phase defects on the sides of the pulse nucleated by spatiotemporal phase shear. These defects grow into closed loops of spatiotemporal vorticity that initially exclude the pulse propagation axis, but then reconnect to form a pair of toroidal vortex rings that wrap around it. STOVs constrain the intrapulse flow of electromagnetic energy, controlling the focusing-defocusing cycles and pulse splitting inherent to nonlinear pulse propagation. We illustrate this in two widely studied but very different regimes, relativistic self-focusing in plasma and nonrelativistic self-focusing in gas, demonstrating that STOVs mediate nonlinear propagation irrespective of the detailed physics.

关键词： Nonlinear beam dynamics Nonlinear optics Ultrafast optics

来源：评论

学校读者我要写书评

暂无评论

An Improved YOLOv5 Detection Method for Strip Surface Defect 28

An Improved YOLOv5 Detection Method for Strip Surface Defect

引用

28th International Conference on Automation and Computing, ICAC 2023

作者： Liu, Yefeng Yu, Longfei Zhang, Qichun School of Automation and Electrical Dept. Liaoning Key Laboratory of Information Physical Fusion and Intelligent Cnc Machine Tool Manufacturing Shenyang Institute of Technology Dept. Fushun China Shenyang Ligong University Dept. School of Automation and Electrica Engineering China University of Bradford Bradford Dept. Department of Computer Science United Kingdom

ISBN: (纸本)9798350335859

Traditional steel surface defect detection methods have issues such as low detection accuracy and efficiency. It is suggested a technique based on enhanced YOLOv5 steel surface fault identification. In order to improve the network's capacity to handle feature information, this study suggests adding SE attention mechanisms to the YOLOv5s network's Backbone, Neck, and SPPF and replacing the C3 structure at the end of the Backbone with C3TR. To achieve network model lightweight, it is proposed to replace the Neck part in the YOLOv5s model and the convolution in SPPF with Ghost convolution. Then, to improve network feature fusion, extend the improved SPPF to the Neck part. Introduce the SPD convolution in the Backbone section to reduce the information loss caused by the neural network's convolution. The tested mAP is 75.3%, which is 5.3% higher than the original model, 24.6% higher than the SSD method, and 4.6% higher than the YOLOv6 algorithm after the upgraded model has been trained on the NEU-DET dataset. The observed FPS is 81.3, which is 6.3 more than the relative literature algorithm and 18.0 more than the SSD algorithm. © 2023 IEEE.

关键词： Convolution

来源：评论

学校读者我要写书评

暂无评论

Novel PM-Assisted Three-Layer Sub-Harmonic Synchronous Machine

Novel PM-Assisted Three-Layer Sub-Harmonic Synchronous Machi...

引用

International Review of Progress in Applied Computational Electromagnetics (ACES)

作者： S M Sajjad Hossain Rafin Qasim Ali Osama A. Mohammed Dept. of Electrical and Computer Engineering Energy Systems Research Laboratory Florida International University Miami Florida USA Dept. of Electrical Engineering Sukkur IBA University Sukkur Pakistan

ISBN: (数字)9781733509671

ISBN: (纸本)9798350362978

This paper presents a permanent magnet-assisted 3-layer sub-harmonic synchronous machine as a promising solution in the transportation sector. Through finite element analysis, the machine exhibits notable improvements over traditional machines, showcasing a 7.8% reduction in torque ripple and an 8.3% increase in average torque. Precise design parameters yield enhanced performance compared to five different synchronous machines. The incorporation of surface-mounted permanent magnets contributes to superior torque generation, making the machine a promising candidate for advancing in transportation applications.

关键词： Torque Windings Transportation Electromagnetic launching Motors Permanent magnets Topology

来源：评论

学校读者我要写书评

暂无评论

Factorization Machine Learning for Disaggregation of Transmission Load Profiles with High Penetration of Behind-the-Meter Solar

Factorization Machine Learning for Disaggregation of Transmi...

引用

2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023

作者： Zhao, Zhenyu Moscovitz, Daniel Du, Liang Fan, Xiaoyuan Temple University Dept. of Electrical and Computer Engineering Philadelphia United States Pjm Interconnection Ems Support Department Audubon United States Pacific Northwest National Laboratory Richland United States

ISBN: (纸本)9798350316445

The ever-growing high penetration of ubiquitously distributed energy resources, especially behind-the-meter solar (BTM) generations, has significant impacts on nodal load (i.e., net injection) profiles and consequently caused imperative operational challenges to system operators such as regional transmission organizations (RTOs). Illustrated by real-world nodal data and examples at PJM Interconnection, this paper first discusses the application and necessity of effectively extracting daily nodal load profiles in a non-intrusive manner. More importantly, a novel bi-level architecture, including Factorization Machines (FM) learning procedure has been proposed to effectively disaggregate not only one node but every node in an RTO service territory. Specifically, FM leaning is adopted to capture the interconnections between related features to better utilize the correlation between buses in the same region and between a single bus and the zonal load. The proposed bi-level technique is numerically validated using real-world, minute-level, normalized, and anonymized nodal data at PJM service territory. © 2023 IEEE.

关键词： behind-the-meter solar factorization machines load disaggregation load modeling

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：