检索结果-内蒙古大学图书馆

Trends in Material Science and Inventive Materials (ICTMIM), International Conference on

作者： Bathala Neeraja M. Dharani K. Lakshmi Khandan L. Umasankar Sukhi Y Rukmani Devi Department of Electrical and Electronics Engineering Government Polytechnic Telangana India Department of Electrical and Electronics Engineering C. Abdul Hakeem College of Engineering and Technology Ranipet Tamil Nadu India Department of Electrical and Electronics Engineering Madanapalle Institute of Technology & Science Madanapalle Andhra Pradesh India Department of Electrical and Electronics Engineering S. A. Engineering College Chennai Tamil Nadu India Department of Electrical and Electronics Engineering R.M.K. Engineering College Tiruvallur Tamil Nadu India Department of Computer Science Saveetha College of Liberal Arts and Sciences SIMATS Deemed to be University Chennai Tamil Nadu India

ISBN: (数字)9798331501488

ISBN: (纸本)9798331501495

electrical drive systems utilizing parallel inverters are widely employed in various industrial applications due to their efficiency and flexibilityStill, one major disadvantage of these systems is the existence of zero-sequence circulating currents (ZSCC) that can distort circulate current and deteriorate the performance with higher losses. In this research work a new strategy that encompasses a synergistic hybrid control associated with a PI deliver optimized through FHO to manage ZSCC in electrical drive systems with parallel inverters is presented. The primary objective of this study is to develop an effective control strategy that mitigates circulating currents (CC) while maintaining system stability across different operating conditions and minimizing Total Harmonic Distortion (THD). The proposed FHO method fine-tunes the parameters of the PI controller, resulting in improved control performance and adaptability. At that point, the suggested approach is put into practice on the MATLAB platform and contrasted with a number of current approaches, including Particle Swarm Optimization (PSO), Bacterial Foraging Optimization Technique (BFOT), and Genetic Algorithm (GA). The proposed method achieves a THD of approximately 3.16%, significantly lower than existing methods, thereby validating the effectiveness of the proposed synergetic hybrid control in enhancing the operational efficiency of electrical drive systems.

关键词： Total harmonic distortion PI control Microorganisms System performance Optimization methods Inverters Real-time systems Reliability Particle swarm optimization Genetic algorithms

来源：评论

学校读者我要写书评

暂无评论

Terminal distribution and the impacts of natural hidden terminal

引用

ELECTRONICS LETTERS 1997年第9期33卷 750-751页

作者： Zahedi, A Pahlavan, K Department of Electrical Engineering Worcester Polytechnic Institute Worcester USA

If the access point (AP) and all the mobile terminals (MT)s have the same coverage radius R, there will always be terminals in the coverage area of the AP which are hidden to one another. The authors introduce this phenomenon, which is referred to as the natural hidden terminal problem, and the throughput of the PLP with even and uneven coverage radii of AP and MTs is analysed, considering capture effects. The effect of uneven coverage radii is analysed and compared for uniform and Gaussian terminal distribution functions.

关键词： local area networks packet radio networks

来源：评论

学校读者我要写书评

暂无评论

DESIGN OF ANALOG AND DIGITAL DATA-TRANSMISSION FILTERS

引用

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-FUNDAMENTAL THEORY AND APPLICATIONS 1993年第7期40卷 449-460页

作者： BAHER, H BENEAT, J Department of Electrical Engineering Worcester Polytechnic Institute Worcester MD USA

This paper presents a design technique for continuous-time and discrete-time data transmission filters. These are pulse shaping networks allowing transmission with minimum intersymbol interference in the time domain, while providing high amplitude selectivity and a close approximation to a constant group delay over the band of interest in the frequency domain. The technique gives the denominator of the filter transfer function in analytic closed form, while its numerator is determined by solving a set of linear algebraic equations. This results in a very powerful, yet simple and straightforward design method, in contrast to existing techniques which usually require the solution of nonlinear equations. Furthermore, all the frequency- and time-domain requirements appear simultaneously in the design without any need for subsequent corrections or equalization.

关键词： Equalization Denominator group delay TRANSFER FUNCTIONS TIME-DOMAIN design approach data transmission design techniques Frequency-domain analysis Filters nonlinear equations Pulse shape closed forms Numerator intersymbolic interference

来源：评论

学校读者我要写书评

暂无评论

Long Short-term Fusion by Multi-scale Distillation for Screen Content Video Quality Enhancement

引用

IEEE Transactions on Circuits and Systems for Video Technology 2025年

作者： Huang, Ziyin Chan, Yui-Lam Kwong, Ngai-Wing Tsang, Sik-Ho Lam, Kin-Man Ling, Wing-Kuen The Hong Kong Polytechnic University Department of Electrical and Electronic Engineering Hong Kong Hong Kong Hong Kong Chu Hai College Department of Computer Science Hong Kong Hong Kong Tsientang Institute for Advanced Study Center for Integrated Circuits and Artificial Intelligence Zhejiang China

Different from natural videos, where artifacts distributed evenly, the artifacts of compressed screen content videos mainly occur in the edge areas. Besides, these videos often exhibit abrupt scene switches, resulting in noticeable distortions in video reconstruction. Existing multiple-frame models using a fixed range of neighbor frames face challenges in effectively enhancing frames during scene switches and lack efficiency in reconstructing high-frequency details. To address these limitations, we propose a novel method that effectively handles scene switches and reconstructs high-frequency information. In the feature extraction part, we develop long-term and short-term feature extraction streams, in which the long-term feature extraction stream learns the contextual information, and the short-term feature extraction stream extracts more related information from shorter input to assist the long-term stream to handle fast motion and scene switches. To further enhance the frame quality during scene switches, we incorporate a similarity-based neighbor frame selector before feeding frames into the short-term stream. This selector identifies relevant neighbor frames, aiding in the efficient handling of scene switches. To dynamically fuse the short-term feature and long-term features, the muti-scale feature distillation focuses on adaptively recalibrating channel-wise feature responses to achieve effective feature distillation. In the reconstruction part, a high-frequency reconstruction block is proposed for guiding the model to restore the high-frequency components. Experimental results demonstrate the significant advancements achieved by our proposed Long Short-term Fusion by Multi-Scale Distillation (LSFMD) method in enhancing the quality of compressed screen content videos, surpassing the current state-of-the-art methods. © 2025 IEEE.

关键词： Image reconstruction

来源：评论

学校读者我要写书评

暂无评论

HIERARCHICAL BLOCK TRUNCATION CODING OF DIGITAL HDTV IMAGES

引用

IEEE TRANSACTIONS ON CONSUMER ELECTRONICS 1990年第3期36卷 254-261页

作者： NASRABADI, NM CHOO, CY HARRIES, T SMALLCOMB, J Electrical Engineering Department Worcester Polytechnic Institute USA

A source coding technique for compressing HDTV (high-definition television) digital images for B-ISDN (broadband integrated services digital network) visual services is presented. The proposed technique is called hierarchical block truncation coding (HBTC). It is a combination of the block truncation coding (BTC) technique and a quadtree segmentation method. The quadtree segmentation is used to decompose an image into homogeneous regions so that the BTC method can exploit the nonstationarity of the image data. Bit rates around 1.46 b/pixel are achieved with this method. Experimental results for several HDTV images are presented. It is shown that greater image compression can be achieved by using a hierarchical BTC method in conjunction with quadtree segmentation, than by applying BTC to an image with uniform block divisions, since the correlation of uniform areas is exploited. This is especially true for appropriate images such as HDTV with large uniform areas.< >

关键词： Image coding HDTV Image segmentation Source coding Bit rate B-ISDN Bandwidth Digital images Image resolution Visual communication

来源：评论

学校读者我要写书评

暂无评论

AN INTEGRATED VOICE DATA SYSTEM FOR MOBILE INDOOR RADIO NETWORKS

引用

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 1990年第1期39卷 75-82页

作者： ZHANG, K PAHLAVAN, K Department of Electrical Engineering Worcester Polytechnic Institute Worcester MA USA

A centralized, integrated voice/data radio network for fading multipath indoor radio channels is proposed and analyzed. The packets of voice and data are integrated through a movable boundary method. The uplink channel access uses a framed-polling protocol whereas the downlink uses a time-division multiple-access (TDMA) scheme. This system dynamically switches between two transmission rates and uses multiple antennas to maximize the throughput in the fading multipath indoor environment. Throughput and delay characteristics of the system are analyzed using four different techniques. The results are compared with those of Monte Carlo computer simulations. A simple relationship between the number of voice terminals and the throughput of the data traffic are derived for an upper bound of 10-ms delay for the data packets.< >

关键词： Data systems Indoor radio communication Throughput Fading Delay Radio network Speech analysis Access protocols Downlink Time division multiple access

来源：评论

学校读者我要写书评

暂无评论

Fundamental Safety-Capability Trade-offs in Fine-tuning Large Language Models

arXiv

引用

arXiv 2025年

作者： Chen, Pin-Yu Shen, Han Das, Payel Chen, Tianyi IBM Research 1101 Kitchawan Road Yorktown HeightsNY10601 United States Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute Jonsson Engineering Center 110 8th Street TroyNY12180 United States

Fine-tuning Large Language Models (LLMs) on some task-specific datasets has been a primary use of LLMs. However, it has been empirically observed that this approach to enhancing capability inevitably compromises safety, a phenomenon also known as the safety-capability trade-off in LLM fine-tuning. This paper presents a theoretical framework for understanding the interplay between safety and capability in two primary safety-aware LLM fine-tuning strategies, providing new insights into the effects of data similarity, context overlap, and alignment loss landscape. Our theoretical results characterize the fundamental limits of the safety-capability trade-off in LLM fine-tuning, which are also validated by numerical experiments. Copyright © 2025, The Authors. All rights reserved.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Privacy-Preserving Short-Term Travel Demand Forecasting Based on Federated Learning

引用

IEEE Transactions on Vehicular Technology 2025年

作者： Du, Runmeng He, Daojing Song, Yan Ding, Zikang Chan, Sammy Li, Xuru Xi'an Polytechnic University School of Computer Science Xi'an710048 China Harbin Institute of Technology School of Computer Science and Technology Shenzhen518055 China East China Normal University School of Software Engineering Shanghai200062 China University of Electronic Science and Technology of China School of Computer Science and Engineering Sichuan611731 China City University of Hong Kong Department of Electrical Engineering Hong Kong Shanghai Maritime University College of Information Engineering Shanghai201306 China

Travel demand forecasting (TDF) is a crucial task in route planning, navigation, and scheduling. However, developing models for such tasks requires significant amount of order data, which can pose privacy concerns for users. Federated learning (FL) has addressed privacy concerns related to TDF. However, previous works only consider the data of a single factor to train the model, resulting in a less precise assessment of the demand for on-demand ride services. Moreover, non-independent and identically distributed ( non-IID) data across clients also brings a challenge in personalizing models for TDF tasks when applying FL directly. In this work, a privacy-preserving short-term TDF scheme for non-IID data is proposed to deal with these problems. Our approach analyzes the correlation between various potential influencing factors and travel demand and summarizes the input variables of the FL model to achieve accurate TDF prediction with privacy preservation. Additionally, we provide each client with a personalized model trained on independent and identically distributed (IID) data to compensate for local model weight divergence. Finally, experiments are conducted on the 2022 Shanghai data of the Didi platform as a use case, and the results demonstrate that our scheme effectively improves the model's performance. © 1967-2012 IEEE.

关键词： Differential privacy

来源：评论

学校读者我要写书评

暂无评论

AI-enabled driver assistance: monitoring head and gaze movements for enhanced safety

引用

Complex and Intelligent Systems 2025年第7期11卷 1-28页

作者： Mudassar Shah, Sayyed Zengkang, Gan Sun, Zhaoyun Hussain, Tariq Zaman, Khalid Alwabli, Abdullah Jaffar, Amar Y. Ali, Farman School of Civil and Transportation Engineering Shenzhen University Guangdong 518060 China School of Computer Science and Technology Zhejiang Gongshang University Hangzhou 310018 China Institute of Intelligent Manufacturing Technology Shenzhen Polytechnic University Guangdong Shenzhen 518000 China Department of Electrical Engineering College of Engineering and Computing in Alqunfudah Umm Al-Qura University Mecca 21955 Saudi Arabia Computer and Network Engineering Department College of Computing Umm Al-Qura University Makkah Saudi Arabia Department of Computer Science and Engineering School of Convergence College of Computing and Informatics Sungkyunkwan University Seoul 03063 South Korea

This paper introduces a real-time head-pose detection and eye-gaze estimation system for Automatic Driver Assistance Technology (ADAT) aimed at enhancing driver safety by accurately collecting and transmitting data on the driver’s head position and eye gaze to mitigate potential risks. Existing methods are constrained by significant limitations, including reduced accuracy under challenging conditions such as varying head orientations and lighting, higher latency in real-time applications (e.g., Faster-RCNN and TPH-YOLOv5), and computational inefficiency, which hinders their deployment in resource-constrained environments. To address these challenges, we propose a novel framework using the Transformer Detection of Gaze Head - YOLOv7 (TDGH-YOLOv7) object detector. The key contributions of this work include the development of a reference image dataset encompassing diverse vertical and horizontal gaze positions alongside the implementation of an optimized detection system that achieves state-of-the-art performance in terms of accuracy and latency. The proposed system achieves superior precision, with a weighted accuracy of 95.02% and Root Mean Square Errors of 2.23 and 1.68 for vertical and horizontal gaze estimation, respectively, validated on the MPII-Gaze and DG-Unicamp datasets. A comprehensive comparative analysis with existing models, such as CNN, SSD, Faster-RCNN, and YOLOv8, underscores the robustness and efficiency of the proposed approach. Finally, the implications of these findings are discussed, and potential avenues for future research are outlined. © The Author(s) 2025.

关键词： Eye gaze estimation Eye tracking Facial detection Gaze Head pose detection

来源：评论

学校读者我要写书评

暂无评论

ON THE CHALLENGES OF INTEGRATING SCIENCE-EDUCATION AND SPACE-FLIGHT EXPERIMENTS

引用

IEEE TRANSACTIONS ON EDUCATION 1989年第4期32卷 436-438页

作者： LOOFT, FJ Department of Electrical Engineering Worcester Polytechnic Institute Worcester MA USA

The NASA Small Self-Contained Payloads Program provides an opportunity to involve students in the definition and development of space-flight experiments. The program offers an opportunity to emphasize and incorporate the basic sciences in the experiment development process. The program organization, approaches for defining an experiment, and the program methodology are described. The experiment development framework emphasizes the need for a strong basic science background and leads naturally to scientifically meaningful experiments.< >

关键词： Educational institutions NASA Payloads Space shuttles electrical capacitance tomography Circuit testing Educational programs engineering education Buildings

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：