检索结果-内蒙古大学图书馆

IEEE Open Journal of Antennas and Propagation 2021年 2卷 151-162页

作者： Boursianis, Achilles D. Papadopoulou, Maria S. Pierezan, Juliano Mariani, Viviana C. Coelho, Leandro S. Sarigiannidis, Panagiotis Koulouridis, Stavros Goudos, Sotirios K. ELEDIA@AUTH Research Group School of Physics Aristotle University of Thessaloniki Thessaloniki54124 Greece Department of Electrical Engineering Federal University of Parana Curitiba80060-000 Brazil Industrial and Systems Engineering Graduate Program and Mechanical Engineering Graduate Program Pontifical Catholic University of Parana Curitiba80215-901 Brazil Department of Electrical and Computer Engineering University of Western Macedonia Kozani501 00 Greece Electrical and Computer Engineering Department University of Patras Patras26504 Greece

Radio frequency energy harvesting has attracted considerable interest as a technique of enabling self-powered wireless networks. This technique faces several challenges, such as the receiving and the rectifying modules of a rectenna system. Multiband antennas provide several comparative advantages against the goal of maximizing the amount of energy harvesting. In this work, we present a multiband microstrip patch antenna with three slits operating in the LoRaWAN (Long Range Wide Area Network) and the cellular (GSM-1800 and UMTS) communication frequency bands. A feasible solution of the antenna is obtained by the application of a recently introduced nature-inspired optimization technique, namely the Coyote Optimization Algorithm. The proposed antenna operates satisfactorily in the LoRaWAN (Long Range Wide Area Network) and the cellular (GSM-1800 and UMTS) communication frequency bands. Measured results of the proposed antenna exhibit an acceptable performance (multiband frequency operation, maximum gain of 3.94 dBi, broadside operation) and demonstrate features of operation, which make it a strong candidate for various RF energy harvesting applications. © 2020 IEEE.

关键词： Microstrip antennas

来源：评论

学校读者我要写书评

暂无评论

Evolving granular classification neural networks

Evolving granular classification neural networks

引用

2009 International Joint Conference on Neural Networks, IJCNN 2009

作者： Leite, Daniel F. Costa Jr., Pyramo Gomide, Fernando Faculty of Electrical and Computer Engineering University of Campinas Brazil Graduate Program in Electrical Engineering Catholic University of Minas Gerais Brazil

ISBN: (纸本)9781424435531

The objective of this study is to introduce the concept of evolving granular neural networks (eGNN) and to develop a framework of information granulation and its role in the online design of neural networks. The suggested eGNN are neural models supported by granule-based learning algorithms whose aim is to tackle classification problems in continuously changing environments. eGNN are constructed from streams of data using fast incremental learning algorithms. eGNN models require a relatively small amount of memory to perform classification tasks. Basically, they try to find information occurring in the incoming data using the concept of granules and T-S neurons as basic processing elements. The main characteristics of eGNN models are continuous learning, self-organization, and adaptation to unknown environments. Association rules and parameters can be easily extracted from its structure at any step during the evolving process. The rule base gives a granular description of the behavior of the system in the input space together with the associated classes. To illustrate the effectiveness of the approach, the paper considers the Iris and Wine benchmark problems. © 2009 IEEE.

关键词： Learning algorithms

来源：评论

学校读者我要写书评

暂无评论

DETERMINATION OF HARMONIC LEVELS IN NON-LINEAR NETWORKS BY COMPUTER-SIMULATION

引用

IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY 1982年第1期24卷 50-52页

作者： GUTMANN, RJ CAMNITZ, LH Solid-State and Microstructures Engineering Division National Science Foundation Electrical Engineering Graduate Program Cornell University Ithaca NY USA

A method of accurately determining harmonic levels in nonlinear networks with periodic excitation is described. Timedomain omain transient analysis is combined with ac steady-state analysis using standard computer-simulation circuit-analysis programs to evaluate low levels of harmonic distortion with appreciably reduced numerical error. The technique is useful in a variety of applications such as mixers, rectifiers, power amplifiers, and switching power supplies.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Compact Model Build Upon Dynamic Weighting Artificial Neural Network Approach for Complementary Field Effect Transistors

引用

IEEE Transactions on Electron Devices 2024年第1期71卷 246-253页

作者： Butola, Rajat Li, Yiming Kola, Sekhar Reddy National Yang Ming Chiao Tung University Parallel and Scientific Computing Laboratory Electrical Engineering and Computer Science International Graduate Program Hsinchu300093 Taiwan Institute of Pioneer Semiconductor Innovation The Institute of Artificial Intelligence Innovation National Yang Ming Chiao Tung University Parallel and Scientific Computing Laboratory Electrical Engineering and Computer Science International Graduate Program The Institute of Communications Engineering the Institute of Biomedical Engineering Department of Electronics and Electrical Engineering Hsinchu300093 Taiwan

In this work, a dynamic weighting-artificial neural network (DW-ANN) methodology is presented for quick and automated compact model (CM) generation. It takes advantage of both TCAD simulations for high accuracy and SPICE simulations for cost-effectiveness. This methodology is developed for gate-all-around (GAA) silicon (Si) nanosheet (NS) complementary field effect transistor (CFET), a potential candidate for future CMOS technology due to its innate properties. The critical process variation (PV) sources that severely degrade the CFET performance are estimated using DW-ANN. It reduces the computation cost and predicts the effects of PV sources with less than 1% error. Furthermore, a compact DW-ANN-based Verilog-A model has been developed that captures the dc as well as transient behavior accurately for circuit-level analysis. CFET-based circuits such as inverter, 6T-static random access memory (SRAM), and ring oscillator (RO) are characterized and implemented using DW-ANN-based CM. The overall average error of the model is reported as less than 2%. Therefore, the proposed device and circuit modeling approach provides a feasible solution for the rapid compact modeling of new emerging devices with good convergence and high accuracy. © 1963-2012 IEEE.

关键词： Neural networks

来源：评论

学校读者我要写书评

暂无评论

Fast saliency detection using sparse random color samples and joint upsampling 29

Fast saliency detection using sparse random color samples an...

引用

29th SIBGRAPI Conference on Graphics, Patterns and Images, SIBGRAPI 2016

作者： Lie, Maiko Min Ian Borba, Gustavo Benvenutti Neto, Hugo Vieira Gamba, Humberto Remigio Graduate Program in Electrical and Computer Engineering Federal University of Technology - Paraná Curitiba Brazil Graduate Program in Biomedical Engineering Federal University of Technology - Paraná Curitiba Brazil

ISBN: (纸本)9781509035687

The human visual system employs a mechanism of visual attention, which selects only part of the incoming information for further processing. Through this mechanism, the brain avoids overloading its limited cognitive capacities. In computer vision, this task is usually accomplished through saliency detection, which outputs the regions of an image that are distinctive with respect to its surroundings. This ability is desirable in many technological applications, such as image compression, video quality assessment and content-based image retrieval. In this paper, a saliency detection method based on color distance with sparse random samples and joint upsampling is presented. This approach computes full-resolution saliency maps with short runtime by leveraging both edge-preserving smoothing and joint upsampling capabilities of the Fast Global Smoother. The proposed method is assessed through precision-recall curves, F-measure and average runtime on the MSRA1K dataset. Results show that the method is competitive with state-of-the-art algorithms in both saliency detection accuracy and runtime. © 2016 IEEE.

关键词： Image compression

来源：评论

学校读者我要写书评

暂无评论

Automatic image thumbnailing based on fast visual saliency detection 16

Automatic image thumbnailing based on fast visual saliency d...

引用

22nd Brazilian Symposium on Multimedia and the Web, WebMedia 2016

作者： Lie, Maiko M. I. Neto, Hugo Vieira Borba, Gustavo B. Gamba, Humberto R. Graduate Program in Electrical and Computer Engineering Federal University of Technology - Paraná Curitiba Brazil Graduate Program in Biomedical Engineering Federal University of Technology - Paraná Curitiba Brazil

ISBN: (纸本)9781450345125

Image retargeting has seen many applications in areas such as content adaptation for small displays and thumbnailing for image database browsing. Most retargeting methods, however, are too expensive computationally to achieve fast performance on common desktop systems. This work addresses the problem of fast automatic thumbnailing for image browsing. A simple approach of automatic thresholding saliency maps and cropping using bounding box extraction is presented. Eight of the fastest saliency detectors in the literature and three automatic thresholding methods are assessed using precision, recall, F-score and execution time on the MSRA1K dataset. The results show that the approach is computationally efficient and adequate for fast automatic image thumbnailing. In particular, saliency detection with difference to random color samples (RS) thresholded by Rosin's method achieved the best trade-off between execution time and F-score. © 2016 ACM.

关键词： Economic and social effects

来源：评论

学校读者我要写书评

暂无评论

Optimal Sizing of Battery Energy Storage Systems in Grid-Connected Power Systems

Optimal Sizing of Battery Energy Storage Systems in Grid-Con...

引用

2024 IEEE URUCON, URUCON 2024

作者： Medeiros, Gabriel. L. Souza, Benemar. A. Federal University of Campina Grande Graduate Program of Electrical Engineering Campina Grande Brazil

ISBN: (纸本)9798350355383

This paper presents a novel methodology for optimal sizing of multiple Battery Energy Storage Systems (BESS) in grid-connected Hybrid Generation Systems (HGS), focusing on centralized dispatch of wind and photovoltaic sources. Using Particle Swarm Optimization (PSO), the study evaluates key reliability indicators, such as dispatch expectations, curtailment reduction, and grid impact, to determine the optimal BESS size. Climatological data from Brazil and load profiles from the Brazilian Northeast system are utilized to assess the BESS impact on the grid. Applied to two configurations on the IEEE 14-bus test grid, the methodology identifies optimal BESS capacities of 33.33 MWh for Site A and 19.47 MWh for Site B, achieving reductions of 8.15% in system inflexibility, 9.09% in curtailment potential, and 8.34% in slack-bus import fluctuations. © 2024 IEEE.

关键词： Battery storage

来源：评论

学校读者我要写书评

暂无评论

Design and Strategy Deployment of SD-WAN Technology: In Indonesia (Case Study: PT. XYZ)

Design and Strategy Deployment of SD-WAN Technology: In Indo...

引用

2021 International Conference on Green Energy, Computing and Sustainable Technology, GECOST 2021

作者： Pratiwi, Wiwi Gunawan, Dadang Universitas Indonesia Graduate Program of Telecommunication Management Department of Electrical Engineering Jakarta Indonesia

ISBN: (纸本)9781665438650

For large companies with branch offices spread across various regions, it is not enough to rely on traditional wide area network (WAN) technology to connect networks between data centers, head offices, and branch offices that are far apart. This is because traditional WAN operation requires many devices with their own complexities. SDN is a method that separates the Control Plane and the Forwarding Plane. In a traditional network, the two functions above are in the same device. One of the SDN technologies on the network is SD-WAN. Another problem in traditional network is WAN infrastructure primarily uses MPLS, which can be very expensive and has limited bandwidth. With the increasing volume of data, MPLS costs can be quite high the expensive cost. PT. XYZ as a banking company that has branches scattered everywhere must pay attention to this. This paper proposes the suitable design and implementation scenario of SD-WAN technology at PT. XYZ so that the existing network can be integrated. From the proposed design, it can be shown that SD-WAN technology is able to answer the weaknesses of traditional WANs in terms of ease of monitoring, cost efficiency, and flexibility © 2021 IEEE.

关键词： Wide area networks

来源：评论

学校读者我要写书评

暂无评论

New perspectives of a 5G operating model

New perspectives of a 5G operating model

引用

International Conference on Telecommunication, Electronic and Computer engineering 2019, ICTEC 2019

作者： Suryanegara, Muhammad Graduate Program in Telecommunications Management Department of Electrical Engineering Depok Universitas Indonesia Indonesia

The way 5G operators manage infrastructure, enterprise and customers will be radically different compared to preceding generations. This paper aims to provide new perspectives on the 5G operating model by presenting a visual guide on how mobile network operators should deliver value to their prospective 5G customers. The model presented enriches the eTOM framework by elaborating on the implications of virtual network operations, the consequences of an mmWave band, the value of the non-human customer, the security concerns, the role of the content provider in a new ecosystem, and the anticipation of the next generation technological platform. © 2020 IOP Publishing Ltd. All rights reserved.

关键词： Network management

来源：评论

学校读者我要写书评

暂无评论

Ultra wideband microstrip antenna using T-shaped stub fed by coplanar waveguide

Ultra wideband microstrip antenna using T-shaped stub fed by...

引用

2013 13th International Conference on Quality in Research, QiR 2013 - In Conjunction with the 2nd International Conference on Civic Space, ICCS 2013

作者： Hadinegoro, Rastanto Surjati, Indra Ningsih, Yuli Kurnia Graduate Program Department of Electrical Engineering Faculty of Industrial Technology TrisaktiUniversity Jakarta Indonesia

ISBN: (纸本)9781467357852

A novel design for ultra wideband microstrip antenna using T-shape stub fed by coplanar waveguide is proposed and experimentally studied. The multiband frequencies can be reached by controlling the length of a and b of the T shaped stub. The results shown that the proposed antenna can be achieved multiband frequencies with return loss -21.5 dB at frequency 2.65GHz, return loss -24.5dB at frequency 5GHz, and return loss -35dB at frequency 8.42GHz. Impedance bandwidth of the proposed antenna is 6570 MHz or about 200% (VSWR

关键词： Coplanar waveguides

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：