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State of charge estimation for electric vehicles using random forest

Green Energy and Intelligent Transportation 2024年第5期3卷 42-51页

作者： Mohd Herwan Sulaiman Zuriani Mustaffa Faculty of Electrical&Electronics Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah(UMPSA)26600 Pekan PahangMalaysia Faculty of Computing Universiti Malaysia Pahang Al-Sultan Abdullah(UMPSA)26600 Pekan PahangMalaysia

This paper introduces an innovative approach to addressing a critical challenge in the electric vehicle(EV)industry—the accurate estimation of the state of charge(SOC)of EV batteries under real-world operating *** electric mobility landscape is rapidly evolving,demanding more precise SOC estimation methods to improve range prediction accuracy and battery *** study applies a Random Forest(RF)machine learning algorithm to improve SOC ***,SOC estimation has posed a formidable challenge,particularly in capturing the complex dependencies between various parameters and SOC values during dynamic driving *** methods,including the Extreme Learning Machine(ELM),have exhibited limitations in providing the accuracy and robustness required for practical EV *** contrast,this research introduces the RF model,for SOC estimation approach that excels in real-world *** leveraging decision trees and ensemble learning,the RF model forms resilient relationships between input parameters,such as voltage,current,ambient temperature,and battery temperatures,and SOC *** unique approach empowers the model to deliver precise and consistent SOC estimates across diverse driving *** comparative analyses showcase the superiority of the RF over *** RF model not only outperforms in accuracy but also demonstrates exceptional robustness and reliability,addressing the pressing needs of the EV *** results of this study not only underscore the potential of RF in advancing electric mobility but also suggest a promising integration of the SOC estimation approach into the battery management system of BMW *** integration holds the key to more efficient and dependable electric vehicle operations,marking a significant milestone in the ongoing evolution of EV ***,the RF model demonstrates a lower Root Mean Squared Error(RMSE)of 5.902,8%compared to 6.312,7%for ELM,and a

关键词： Electric vehicles Extreme learning machine Machine learning Random Forest State of charge of battery

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Refractive Index Measurement Based on Fibre Optics with Multiparameter Sensing Capabilities 19

Refractive Index Measurement Based on Fibre Optics with Mult...

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19th IEEE International Colloquium on Signal Processing and Its Applications, CSPA 2023

作者： Bong, Paul Cornelius Tan, Alfred Jia Yee Chua, Hong Siang Swinburne University of Technology Sarawak Campus Faculty of Engineering Computing and Science Kuching Malaysia

ISBN: (纸本)9781665476928

Quality control and assurance plays a core in chemical, agrifood, F B and pharmaceutical industries due to quality regulations. Refractometry plays an indispensable part in determining the composition or purity of a sample and conventional solutions can be intrusive and very expensive. In this paper we aim to determine the Refractive Index (RI) sensing and multiparameter sensing capabilities of a triple U-shaped side + center polished macrobent fibre optic sensor prototype. This prototype was tested on controlled glycerol samples ranging from (1.34-1.39) Refractive Index Unit (RIU) and showed a linear trend in RI sensing. It boasts an average percentage error of 0.1318% in refractive index measurements when subjected to 12 randomly prepared test data within the range of(1.33 to 1.40) RIU. Individually, the percentage error is higher for each probe but did not exceed 0.4% when used in tandem. This proves improved performance when using multiple probes with different configurations. The sensor was also able to extrapolate further for 1. 40RIU which was not within the range of the training data thus it is highly scalable. Its temperature sensing (30°C to 45°C) capabilities was also tested. Despite the great performance in RI sensing, the center polished probe was found unsuitable. The 500\mum diagonal polished probe showed great sensitivity and linearity while the 300\mum diagonal polished probe showed low sensitivity and high linearity, thus allowing the system to determine the RIU of the solution at room temperature. This project shows great promise in the field of multiparameter RI sensing. © 2023 IEEE.

关键词： Probes

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Community Involvement in Fire reporting: Time Series Examination of Official Reports and Social Media Posts in Split and Dalmatia County 8

Community Involvement in Fire reporting: Time Series Examina...

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8th International Conference on Smart and Sustainable Technologies, SpliTech 2023

作者： Buhovac, Selena Knežić Šerić, Ljiljana Ivanda, Antonia University of Mostar Faculty of Mechanical Engineering Computing and Electrical Engineering Mostar Bosnia and Herzegovina University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia

ISBN: (纸本)9789532901283

In this paper, we examine the value of social media posts in comparison with official records on a case study of wildfires that occurred on the territory of Split and Dalmatia County in 2021 and 2022. Three sources of data were used. Unofficial data from the Facebook social network fun page, official daily media reports posted by Croatian Fire Association and official data from the firefighting interventions database. Appropriate measures for event description based on word counts and number of intervention participants was utilized to create timeseries of data from three sources. To obtain insights into data correlation, time series analysis metrics and Pearson's and R2, coefficient of determination were employed. While the plots reveal similarity among the data, the metrics did show evident correlation with traditional measures. However, this paper highlights the significance and value of unofficial crowdsourced data when compared to official data and the significance of community involvement in crisis management. © 2023 University of Split, FESB.

关键词： Time series analysis

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A Comprehensive Review of Large Language Models in Abstractive Summarization of News Articles

A Comprehensive Review of Large Language Models in Abstracti...

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2024 Asia Pacific Conference on Innovation in Technology, APCIT 2024

作者： Bharathi Mohan, G. Akashvarma, M. Yashaswini, G. Keerthana, E. Siddharth, S. Saipooja, K. Prasanna Kumar, G. Doss, Srinath Amrita Vishwa Vidyapeetham Amrita School of Computing Department of Computer Science and Engineering Chennai India Botho University Faculty of Engineering and Technology Botswana

ISBN: (纸本)9798350361537

Recent years have seen significant advancements in Large Language Models (LLMs), particularly in their application to natural language processing tasks. One prominent application is the abstractive summarization of news articles, a process that distills extensive textual information into a succinct yet comprehensive representation. The significance of this task lies in its capacity to efficiently distill key information. This paper focuses on evaluating the performance of various LLMs - Llama-2-7b, T5, Bart, and Pegasus - specifically fine-tuned on the CNN Daily dataset of news articles. QLoRA and Prompt-Based Fine-Tuning Approaches are employed systematically to compare the efficacy of these models in generating summaries that capture the essence of news articles. Evaluation metrics, including ROUGE, BLEU, and cosine similarity, are utilized to assess summarization quality. The findings reveal distinctive results among the selected LLMs such that Llama-2 excels in ROUGE-1 and ROUGE-L with scoreS of 0.45 and 0.427, Pegasus demonstrates remarkable performance in ROUGE-2 and cosine similarity with scores 0.19 and 0.6 respectively. © 2024 IEEE.

关键词： Natural language processing systems

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Grid-Forming PV System for Frequency Ancillary Services Provision 3

Grid-Forming PV System for Frequency Ancillary Services Prov...

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3rd International Conference on Energy Transition in the Mediterranean Area, SyNERGY MED 2024

作者： Barac, Bojana Capuder, Tomislav Panteli, Mathaios University of Zagreb Faculty of Electrical Engineering and Computing Department of Energy and Power Systems Croatia University of Cyprus Department of Electrical and Computer Engineering Cyprus

ISBN: (纸本)9798350375923

With the increasing penetration of photovoltaic (PV) systems posing challenges to power system stability, this paper investigates the effectiveness of grid-forming controlled PV systems in providing frequency ancillary services. The study implements the Virtual Synchronous Machine strategy, utilizing DC-link capacitor energy for inertial response provision (DCVQVSM), integrated within a grid-forming topology. To ensure power-frequency droop control, an additional control loop is introduced within the DCVQ-VSM topology. The efficacy of this control system is proved through simulations conducted on a simple two-bus system and a fully-electrified active distribution network (ADN). Both case studies demonstrate the successful operation of grid-forming controlled PV systems, highlighting their capability to influence power system frequency dynamics. The analysis underscores the significance of deloading PV operation in facilitating flexibility services provision, thereby enhancing the reliability and resilience of system operation. © 2024 IEEE.

关键词： Synchronous machinery

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Towards distinguishing trust based attacks in an IoV network

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Journal of King Saud University - Computer and Information Sciences 2025年第4期37卷 1-15页

作者： Wang, Yingxun Mahmood, Adnan Mohd Sabri, Mohamad Faizrizwan Zen, Hushairi Faculty of Engineering Universiti Malaysia Sarawak Sarawak Kota Samarahan 94300 Malaysia Faculty of Computer and Information Engineering Qilu Institute of Technology Jinan 250200 China School of Computing Macquarie University Sydney 2109 NSW Australia Faculty of Engineering and Technology i-CATS University College Sarawak Kuching 93350 Malaysia

The paradigm of the Internet of Vehicles (IoV) promises significant innovative advancements and is receiving an increased attention of the researchers from both academia and industry. The IoV creates an intelligent network between different road entities and their corresponding roadside infrastructure via state-of-the-art sensing and communication technologies and, therefore, facilitates in addressing a range of safety-critical and non-safety vehicular applications. Accordingly, the security of an IoV network is of importance with internal attacks being of considerable concern. Although the conventional cryptography-based schemes are extremely intelligent in tackling the external attacks, trust has been recently employed to handle the internal attacks. Nevertheless, trust-based attacks also present a formidable challenge. Therefore, in this paper, an IoV-based trust management heuristic has been envisaged that takes into account both direct trust and indirect trust to ascertain the behaviors of the vehicles vis-à-vis time in a bid to detect various trust-based attacks, i.e., zig-zag attacks, self-promoting attacks, on-off attacks, and opportunistic attacks, along with the attackers’ multiple attacking strategies. The experimental findings further demonstrate that the envisaged IoV-based trust management heuristic exhibits prompt and accurate detection of the trust-based attacks in contrast to the state-of-the-art trust management mechanisms. © The Author(s) 2025.

关键词： Internet of vehicles Non-safety vehicular applications Safety-critical vehicular applications Trust-related attacks Vehicles’ behaviors

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Improvement of Vision-Based Hand Gesture Recognition System with Distance Range 22nd

Improvement of Vision-Based Hand Gesture Recognition System ...

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22nd Asia Simulation Conference, AsiaSim 2023

作者： Mukhtar, Muhammad Eirfan Sunar, Noorhazirah Wahab, Nur Haliza Abd Muhammad, Nor Aishah Rahmat, Mohd Fua’ad Faculty of Electrical Engineering Universiti Teknologi Malaysia Johor Johor Bahru Malaysia Faculty of Computing Universiti Teknologi Malaysia Johor Johor Bahru Malaysia

ISBN: (纸本)9789819972395

Hand gestures are widely explored for the human action interface, reducing the complexity of interaction between humans and computers. Hand gesture-based interaction for computer applications enables touchless operation without the need for other devices such as a keyboard and mouse. It also guarantees sterility and safer interaction for multiple users. The issue of HGR has a low range of detection. This study aims to improve the distance range for HGR from the user to the computer camera using the zoom algorithm that is processed by OpenCV and the Mediapipe library. To verify the proposed system, a Graphical User Interface (GUI) for four applications is developed in HGR mode. The GUI includes the development of cursor mouse event commands and a virtual keyboard display. The proposed method was then tested for some time, and the result indicates that the maximum range of detection increased with the accuracy of the HGR. The proposed method meets the expected outcome and can be used for applications such as slide presentations and watching video applications. © 2024, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Graphical user interfaces

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An approach for measuring spatial similarity among COVID-19 epicenters

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Geo-Spatial Information Science 2023年第3期26卷 496-513页

作者： Neda Kaffash Charandabi Abolghasem Sadeghi-Niaraki Soo-Mi Choi Tamer Abuhmed Geomatic Department Marand Technical FacultyUniversity of TabrizTabrizIran Department of Computer Science and Engineering and Convergence Engineering for Intelligent Drone Sejong UniversitySeoulSouth Korea College of Computing and Informatics Sungkyunkwan UniversitySuwonSouth Korea

Most countries and territories worldwide are affected by coronavirus disease 2019(COVID-19),and some cities have become known as epicenters owing to high *** of the changeable and unknown nature of the virus,managers of different cities could learn from the experiences of cities that have been successful in controlling COVID-19 instead of wasting time exploring different *** would be even more beneficial if they analyzed the experiences of similar *** similarity of such cities could be examined within a geographic information system based on various *** study investigated the similarities among eight cities-Wuhan,Tehran,Bergamo,Madrid,Paris,Daegu,New York,and Berlin-in terms of the COVID-19 situation(target)in these locations based on proximity factors,weather,and demographic ***,the factor and target layers were prepared,and then similar cities were identified using a similarity model and different distance *** results were aggregated using the Copeland method because of the different outcomes for each *** most similar city was identified for each selected city,and its similarity level was determined based on these *** results suggested the following pairs of similar cities:Wuhan-Berlin,Tehran-Berlin,Daegu-Wuhan,Bergamo-Madrid,Paris-Madrid,and New York-Paris based on COVID-19 related data up to 15 April 2020(target T1),and Daegu-Wuhan,Tehran-Madrid,Bergamo-Paris,Berlin-Paris,and New York-Madrid up to 8 December 2021(target T2)with a minimum and maximum similarity rate of 82.85%and 92.36%,*** similar cities,the most similar factors among the proximity criteria are the distance from bus and metro stations;among weather,the criteria are humidity and pressure;and among demographics,the criteria are male and female population ratios,literacy ratio,and death ratio from asthma and cancer,with a minimum and maximum difference of 0%and 64.94%,*** addition,according to the rando

关键词： COVID-19 GIS spatial similarity environmental factors demographic factors

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YOLO-based Traffic Signal Optimization for Intelligent Traffic Flow Management 8

YOLO-based Traffic Signal Optimization for Intelligent Traff...

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8th International Conference on I-SMAC (IoT in Social, Mobile, Analytics and Cloud), I-SMAC 2024

作者： Joesam Dinesh, C. Shrinidhi, S. Amaran, Sibi Sree Kumar, K. Karthikeyan, U. Srm Institute of Science and Technology Dept of Computing Technologies Kattankulathur India Dept of Computing Technologies Kattankulathur India Srm Institute of Science and Technology Computing Technologies College of Engineering and Technology Faculty of Engineering and Technology Kattankulathur SRM Nagar Tamilnadu Chennai603203 India

ISBN: (纸本)9798350376425

As cities grow in population and the number of vehicles increases, traffic congestion has become a major problem. Traffic jams lead to delays, driver stress, higher fuel consumption, and increased air pollution. Megacities are particularly affected. To manage traffic effectively, it's essential to calculate road traffic density in real-time. Optimizing traffic control is crucial for this. The system uses live images from traffic cameras and AI-based image processing to measure vehicle density and adjust traffic signals accordingly, reducing congestion, speeding up transit, and lowering pollution. © 2024 IEEE.

关键词： Traffic congestion

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Implementation of Voltage Regulation in a Spread-Spectrum-Clocked Buck Converter 46

Implementation of Voltage Regulation in a Spread-Spectrum-Cl...

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46th ICT and Electronics Convention, MIPRO 2023

作者： Kundrata, Jurica Baric, Adrijan University of Zagreb Faculty of Electrical Engineering and Computing Unska 3 Zagreb10000 Croatia

ISBN: (纸本)9789532331042

Buck converters use spread-spectrum technique to reduce the electromagnetic emissions by distributing the electromagnetic interference in a frequency band around the switching frequency which consequently reduces the amplitude of the interference. Changing the switching frequency also changes the output voltage and causes an unwanted output voltage ripple. The output voltage ripple is then reduced by properly controlling the time delay used in the duty cycle controller of the buck converter. This paper presents a digital implementation of the duty cycle controller used in the buck converter which uses a phase-locked loop to generate the switching frequency. Changing the divider value of the phase-locked loop changes its output frequency, but this frequency change is not instantaneous and it is modelled as a second-order system response. The implementation of the duty cycle controller presented and analysed in this paper aims to compensate for this transient change of the output frequency, i.e. the switching frequency and keep the duty cycle of the buck converter constant. The paper focuses on the compensation algorithm used to generate a constant duty cycle, as well as on the challenges of its digital implementation. © 2023 MIPRO Croatian Society.

关键词： Voltage regulators

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