检索结果-内蒙古大学图书馆

2023 International Conference on Smart Energy systems and Technologies, SEST 2023

作者： Matijasevic, Terezija Antic, Tomislav Capuder, Tomislav University of Zagreb Faculty of Electrical Engineering and Computing Department of Energy and Power Systems Zagreb Croatia

ISBN: (纸本)9798350397901

Current major changes in distribution systems require better monitoring from energy utilities to prevent possible issues in the form of deterioration of power quality and stability, voltage oscillations, and many others. However, distribution networks are still characterized by their limited observability, where information such as switching state and line parameters are not known. This constraint further complicates analyses concerning the observations of distribution networks. Therefore, this paper proposes a methodology that, as an answer to these problems, offers machine learning-based algorithms that aim to determine the switching state and line parameters of distribution networks using only collected historical Advanced Metering Infrastructure (AMI) measurements. This model was tested on the radial IEEE 33-bus benchmark system and both meshed and radial real-world distribution networks. The results demonstrate that the proposed method can provide an accurate estimation of line parameters and network topology relying only on voltage magnitudes and active and reactive power measurements. © 2023 IEEE.

关键词： Power quality

来源：评论

学校读者我要写书评

暂无评论

Multi-channel CNN to classify Nepali COVID-19 related tweets using hybrid features

引用

Journal of Ambient Intelligence and Humanized Computing 2024年第3期15卷 2047-2056页

作者： Sitaula, Chiranjibi Shahi, Tej Bahadur Department of Electrical and Computer Systems Engineering Monash University Wellington Rd ClaytonVIC3800 Australia Earth Observation and AI Research Group Department of Infrastructure Engineering The University of Melbourne ParkvilleVIC3010 Australia School of Engineering and Technology Central Queensland University Rockhampton Australia Central Department of Computer Science and Information Technology Tribhuvan University TU Rd Kathmandu Kirtipur44618 Nepal

Because of the current COVID-19 pandemic’s increasing fears among people, it has triggered several health complications such as depression and anxiety. Such complications have not only affected developed countries but also developing countries such as Nepal. These complications can be understood from peoples’ tweets and comments posted online after their felicitous analysis and sentiment classification. Nevertheless, owing to the limited number of tokens and words in each tweet, it is crucial to capture multiple pieces of information associated with them for better understanding. In this study, we, first, represent each tweet by combining both syntactic and semantic information, called hybrid features. The syntactic information is generated from the bag-of-words method, whereas the semantic information is generated from the combination of the fastText-based (ft) and domain-specific (ds) methods. Second, we design a novel multi-channel CNN (MCNN) model, which ensembles the multiple CNNs, to capture multi-scale information for better classification. Last, we evaluate the efficacy of both the proposed feature extraction method and the MCNN model classifying tweets into three sentiment classes (positive, neutral, and negative) on the NepCOV19Tweets dataset, which is the only public COVID-19 tweets dataset in the Nepali language. The evaluation results show that the proposed hybrid features outperform individual feature extraction methods with the highest classification accuracy of 69.7% and the MCNN model outperforms the existing methods with the highest classification accuracy of 71.3% during classification. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023.

关键词： COVID-19

来源：评论

学校读者我要写书评

暂无评论

Enhanced DFT-Based Chaotic Image Block Cipher with Several Modes of Operation 12

Enhanced DFT-Based Chaotic Image Block Cipher with Several M...

引用

12th International Conference on Image Processing Theory, Tools and Applications, IPTA 2023

作者： Yassin, Mahmoud Y. M. Nasir, Ali A. Taha, Mostafa Iqbal, Naveed Department of Electrical Engineering Dhahran Saudi Arabia Center for Communication Systems and Sensing Kfupm Dhahran Saudi Arabia Carleton University Systems and Computer Engineering OttawaON Canada

ISBN: (纸本)9798350325416

Chaotic image encryption has been investigated extensively in the literature in different domains, including the frequency domain using Discrete Fourier Transform (DFT). Despite DFT-based chaotic image cryptosystems exhibiting good confusion properties, they suffer from poor diffusion characteristics and non-uniform histograms. Therefore, they are vulnerable to many attacks, such as differential attacks, and statistical cryptanalytic attacks. This paper presents an enhanced block cipher image cryptosystem with several modes of operation based on the concept of bit reversal using the 2D chaotic Baker map and DFT. The proposed enhancement develops an improved image encryption scheme that involves properly diffusion-confusion enhanced operations within modified versions of the known block cipher modes of operation, namely Cipher Block Chaining Mode (CBC), Cipher Feedback Mode (CFB), and Output Feedback Mode (OFB). These enhanced operations are based on a 2D chaotic baker map in the Fourier domain. The proposed enhancement is validated using a MATLAB simulation. Results show that the proposed work manages to overcome the abovementioned problems outstandingly and outperforms the existing results in the literature in many encryption quality metrics. © 2023 IEEE.

关键词： Discrete Fourier transforms

来源：评论

学校读者我要写书评

暂无评论

"There is a Damn Hello on the Social Media!" Insights into Public Risk Communication in the Digital Age 18th

"There is a Damn Hello on the Social Media!" Insights into P...

引用

18th IFIP WG 11.12 International Symposium on Human Aspects of Information Security and Assurance, HAISA 2024

作者： Große, Christine Division of Computer Science Electrical and Space Engineering Department of Digital Services and Systems Luleå University of Technology Luleå971 87 Sweden

ISBN: (纸本)9783031725586

The ability to handle threats, such as disinformation, manipulation of public opinion, and disruption of critical supplies, is becoming increasingly important, thus, necessitating, among other strategies, efforts to establish a proper risk communication to the public. This paper addresses the need for more empirical research in this area to contribute to the development of an in-depth understanding of public risk communication that includes information-related threats and cyber issues. The study involves officials of three public organizations entrusted with safety and security in society: the police, the rescue service, and the county administrative board of a county in the middle of Sweden. The results detail the recognition of risks to be communicated, the organization of the communication process, the messages that these actors seek to bring forth, and to whom as well as challenges of public risk communication in the digital era. The findings indicate that information-related and cyber risks are increasingly essential to consider as an additional layer of public communication. Two implications emerged as particularly important: (1) all communication about risks and crises must consider the systemic risk of mis- and disinformation, and (2) tailored communication about the risks interrelated with disinformation should use human-centered, dialogue-based, and moderated approaches. Further research can focus on associated challenges, considering the distribution of responsibilities, inter-organizational information sharing and cooperation, and the possibly stochastic effects on critical (information) infrastructures and, ultimately, societal values. © IFIP International Federation for Information Processing 2025.

关键词： Stochastic systems

来源：评论

学校读者我要写书评

暂无评论

"Risky or Trustworthy?": User Behavior towards Biometric Authentication Method 7

"Risky or Trustworthy?": User Behavior towards Biometric Aut...

引用

7th Information systems International Conference, ISICO 2023

作者： Kusyanti, Ari Catherina, Harin Puspa Ayu Effendrik, Popong Santoso, Nurudin Ekowati, Nurul Syamsi Department of Computer Science Universitas Brawijaya Indonesia Department of Information Systems Universitas Brawijaya Indonesia Department of Electrical Engineering Politeknik Negeri Malang Indonesia

Smartphones as a means of communication are not only used to send and receive messages and make phone calls. Today's smartphones are also intended to store personal data and sensitive information hence it is vulnerable to be illegally accessed by others. Fingerprint as a biometric lock screen for smartphones can be trusted to ensure the security and privacy of smartphone users. A fingerprint is closely related to a user's identity. When using fingerprints, users provide their personal biometric pattern, unknowingly giving their privacy and making them vulnerable to unauthorized use of their biometric pattern. This study is designed to reveal the factors that influence users when using fingerprints as a smartphone lock, using eight variables adapted from previous research. The data analysis used is Partial Least Squares (PLS) analysis. The results of this study suggest that trust, attitudes, and perceived risk are the factors that influence users when using their fingerprint as a smartphone lock. © 2023 The Authors. Published by Elsevier B.V.

关键词： Smartphones

来源：评论

学校读者我要写书评

暂无评论

Comprehensive Overview of Multi-agent systems for Controlling Smart Grids

引用

CSEE Journal of Power and Energy systems 2022年第1期8卷 115-131页

作者： Om Prakash Mahela Mahdi Khosravy Neeraj Gupta Baseem Khan Hassan Haes Alhelou Rajendra Mahla Nilesh Patel Pierluigi Siano Power System Planning Division Rajasthan Rajya Vidyut Prasaran Nigam Ltd.Jaipur-302005India Media Integrated Communication Laboratory Graduate School of EngineeringOsaka UniversityOsakaJapan Computer Science and Engineering Department Oakland UniversityRochesterUSA Department of Electrical and Computer Engineering Hawassa UniversityHawassa 1530Ethiopia Faculty of Mechanical and Electrical Engineering Tishreen UniversityLattakiaSyria Department of Electrical Engineering National Institute of Technology Kurukshetra Department of Management&Innovation Systems University of Salerno84084 SalernoItaly

Agents are intelligent entities that act flexibly and autonomously and make wise decisions based on their intelligence and experience.A multi-agent system(MAS)contains multiple,intelligent,and interconnected collaborating agents for solving a problem beyond the ability of a single agent.A smart grid(SG)combines advanced intelligent systems,control techniques,and sensing methods with an existing utility power *** controlling smart grids,various control systems with different architectures have already been ***-based control of power system operations has been shown to overcome the limitations of time required for analysis,relaying,and protection;transmission switching;communication protocols;and management of plant *** systems provide an alternative for fast and accurate power network *** paper provides a comprehensive overview of MASs used for the control of smart *** paper provides a wide-spectrum view of the status of smart grids,MAS-based control techniques and their implementation for the control of smart *** of MASs in the control of various aspects of smart grids-including the management of energy,marketing energy,pricing,scheduling energy,reliability,network security,fault handling capability,communication between agents,SG-electrical vehicles,SG-building energy systems,and soft grids—have been critically *** than a hundred publications on the topic of MAS-based control of smart grids have been critically examined,classified,and arranged for fast reference.

关键词： Coordinated control multi-agent systems renewable energy sources smart energy infrastructure smart grid

来源：评论

学校读者我要写书评

暂无评论

PERFORMANCE TESTING OF A SOLAR PV SYSTEM CONTROLLED AS A VIRTUAL SYNCHRONOUS MACHINE TO VERIFY GRID CODE COMPLIANCE 22

PERFORMANCE TESTING OF A SOLAR PV SYSTEM CONTROLLED AS A VIR...

引用

22nd IET International Conference on AC and DC Power Transmission, ACDC Global 2025

作者： Gunasekara, Randupama T. Muthumuni, Dharshana Filizadeh, Shaahin Power Systems Technology Centre Manitoba Hydro International Winnipeg Canada Department of Electrical and Computer Engineering University of Manitoba Winnipeg Canada

This paper presents a comprehensive analysis of the functional response verification of an inverter operating as a Virtual Synchronous Machine (VSM) in grid-following mode. The proposed VSM control strategy addresses critical technical challenges associated with integrating Inverter-Based Resources (IBRs) into weak power grids. Modern grid codes outline essential performance requirements of IBRs, including voltage regulation, reactive power support, frequency control, and resilience during grid disturbances. An electromagnetic transient (EMT)-domain based testing procedure (generally referred to as Model Quality Tests - MQT) of a 50 MVA solar PV plant controlled as a VSM is presented. These tests ensure accurate model representation and IBR's compliance with regulatory standards. Furthermore, the paper explores the adaptability of VSM controls in delivering essential functional features, such as inertial and fast frequency response, to enhance grid stability and operational efficiency. The test results highlight the ability of inverters operating as VSMs to meet essential grid code requirements, thereby enabling the reliable integration of renewable energy sources into power systems and supporting the transition toward sustainable energy. © The Institution of engineering & Technology 2025.

关键词： Electric power system control

来源：评论

学校读者我要写书评

暂无评论

A General Framework for Human-Drone Interaction under Limited On-board Sensing

A General Framework for Human-Drone Interaction under Limite...

引用

2023 systems and Information engineering Design Symposium, SIEDS 2023

作者： Nayhouse, S. Chadha, S. Hourican, P. Moore, C. Bezzo, N. University of Virginia Departments of Systems and Information Engineering and Electrical and Computer Engineering CharlottesvilleVA22903 United States University of Virginia Department of Electrical and Computer Engineering CharlottesvilleVA22903 United States

ISBN: (纸本)9798350300642

Recent advancements in unmanned aerial vehicles (UAVs), has allowed their deployment for numerous applications like aerial photography, infrastructure inspection, search and rescue, and surveillance. Despite the potential for full autonomy, many applications still necessitate human operators for navigating complex environments and decision-making. Existing solutions often employ high-precision and simple sensors like 2-D or 3-D LiDAR, which may provide more data than necessary and contribute to increased system complexity and cost. To address these challenges and bridge the gap between full autonomy and human-controlled UAVs, this work develops a shared-autonomy framework for UAVs, leveraging lightweight, low-cost 1-D LiDAR sensors combined with mobility behaviors to obtain performance comparable to more advanced 2-D/3-D LiDAR sensors while minimizing energy, computation overhead, and weight. Our framework includes a novel state machine method that exploits the UAV mobility to compensate for the limitations of 1-D LiDAR sensors, ensuring safety and obstacle avoidance through a physics-based algorithm that transitions between teleoperation and autonomous mode as needed based on environmental conditions and safety-critical issues. Experimental validations on real UAVs demonstrates the effectiveness of this shared autonomy scheme in complex environments, and the system is further generalized to larger UAVs and prototyped with a custom sensor configuration and onboard obstacle avoidance. © 2023 IEEE.

关键词： Drones

来源：评论

学校读者我要写书评

暂无评论

An Inductance Testing Method of Dual Three-phase Permanent Magnet Synchronous Machines Using Equivalent Electromagnetic Field Analysis

An Inductance Testing Method of Dual Three-phase Permanent M...

引用

2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023

作者： Zeng, Depeng Zhang, Qiang Zou, Jibin Xu, Yongxiang Pan, Hailang Harbin Engineering University College of Intelligent Systems Science and Engineering Harbin150001 China Harbin Institute of Technology Department of Electrical Engineering Harbin150001 China

ISBN: (纸本)9798350338362

Nowadays, in the test of permanent magnet synchronous machines (PMSMs) with traditional q-axis and d-axis inductances testing methods, the machine needs to be connected to a mechanical load, and the test must be performed in the normal operating situation. However, there are some problems existing in traditional q-axis and d-axis inductances testing methods for PMSMs, such as complexity of test systems, high testing cost, etc. It restricts the testing method development of PMSMs. In this paper, a normal method for testing q-axis and d-axis inductances of dual three-phase PMSMs is proposed based on its structural characteristics and AC standstill test. The key point of the proposed method is using equivalent electromagnetic field analysis. The advantages of this method are avoiding auxiliary equipment and considering the saturation effect. In the process of testing the q-axis and d-axis inductances of dual three-phase PMSMs, AC current with DC bias is excited in a set of windings of dual three-phase PMSMs. The DC current component is used to reflect the saturation of the magnetic circuit, and the AC current component is used for the inductance test;DC current is excited the other set of winding of the machine, and it is used to adjust and fix the rotor position. Finally, the method is validated in simulation and experiment, and the error analysis of the test results is performed. © 2023 IEEE.

关键词： Inductance

来源：评论

学校读者我要写书评

暂无评论

TECMH:Transformer-Based Cross-Modal Hashing For Fine-Grained Image-Text Retrieval

引用

Computers, Materials & Continua 2023年第5期75卷 3713-3728页

作者： Qiqi Li Longfei Ma Zheng Jiang Mingyong Li Bo Jin College of Computer and Information Science Chongqing Normal UniversityChongqing401331China Institute of Systems and Robotics(ISR) Department of Electrical and Computer Engineering(DEEC)University of CoimbraCoimbraPortugal

In recent years,cross-modal hash retrieval has become a popular research field because of its advantages of high efficiency and low ***-modal retrieval technology can be applied to search engines,crossmodalmedical processing,*** existing main method is to use amulti-label matching paradigm to finish the retrieval ***,such methods do not use fine-grained information in the multi-modal data,which may lead to suboptimal *** avoid cross-modal matching turning into label matching,this paper proposes an end-to-end fine-grained cross-modal hash retrieval method,which can focus more on the fine-grained semantic information of multi-modal ***,the method refines the image features and no longer uses multiple labels to represent text features but uses BERT for ***,this method uses the inference capabilities of the transformer encoder to generate global fine-grained ***,in order to better judge the effect of the fine-grained model,this paper uses the datasets in the image text matching field instead of the traditional label-matching *** article experiment on Microsoft COCO(MS-COCO)and Flickr30K datasets and compare it with the previous *** experimental results show that this method can obtain more advanced results in the cross-modal hash retrieval field.

关键词： Deep learning cross-modal retrieval hash learning transformer

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：