Journal of Electrical Engineering & Technology最新文献_第5页

Analysis of Photoplethysmography-Based Surgical Pain Severity Assessment Markers 基于光敏肌电图的手术疼痛严重程度评估指标分析

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-12 DOI: 10.1007/s42835-024-01999-1

Gayeon Ryu, Jae Moon Choi, Jaehyung Lee, Hyeon Seok Seok, Hangsik Shin, Byung-Moon Choi

{"title":"Analysis of Photoplethysmography-Based Surgical Pain Severity Assessment Markers","authors":"Gayeon Ryu, Jae Moon Choi, Jaehyung Lee, Hyeon Seok Seok, Hangsik Shin, Byung-Moon Choi","doi":"10.1007/s42835-024-01999-1","DOIUrl":"https://doi.org/10.1007/s42835-024-01999-1","url":null,"abstract":"We investigated the use of photoplethysmography (PPG) features to assess the severity of both intraoperative and postoperative pain. PPG data was collected from 386 patients undergoing routine surgery. We extracted 180 pain assessment features based on PPG waveform characteristics identified in previous studies. Pain assessment involves a two-step process. First, we evaluated the presence of pain using the extracted features. If significant pain was detected, we then conducted a severity analysis. Pain severity was categorized into three groups: no pain, moderate, and severe. Intraoperative and postoperative pain labeling were based on clinical judgment and numerical rating scale criteria, respectively. For intraoperative pain presence, we performed statistical tests to identify significant changes in features before and after both intubation and skin incision. Postoperative pain presence analysis compared preoperative and postoperative periods. Statistical analysis revealed 106 and 124 features significant for intraoperative and postoperative pain presence, respectively. Among the pain-related features, 27 related to PPG amplitude, area, and slope were significant for all severity comparisons (no pain vs. moderate, no pain vs. severe, and moderate vs. severe) during intraoperative assessment. Postoperative severity assessment identified 12 significant features related to PPG amplitude, area, and pulse interval. These results suggest the potential of PPG-based features for assessing pain severity.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Brake Position Control of Electric Mover Based on the Disturbance Force Observer 基于扰动力观测器的电动滚筒制动位置控制

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-12 DOI: 10.1007/s42835-024-02014-3

Dong-Hee Lee

{"title":"Brake Position Control of Electric Mover Based on the Disturbance Force Observer","authors":"Dong-Hee Lee","doi":"10.1007/s42835-024-02014-3","DOIUrl":"https://doi.org/10.1007/s42835-024-02014-3","url":null,"abstract":"Although the heavy non-powered trailer can be easily moved and driven by the prime traction vehicle, positioning and parking are not easy. This is because it requires highly skilled driving skills. The electric mover system can drive the heavy non-powered trailer itself without a prime vehicle using the electric driven roller at the trailer wheel. During the driving mode, the mover roller is detached from the trailer wheel to reduce the traction vehicle load. The roller is solid-firmed to the trailer tire and then rotates the trailer wheel by the electric motor to adjust the parking position during the parking mode.To suppress the proper friction between the mover roller and trailer tire, the actuator motor has to be stopped at the proper braking point of the roller. And, this can be implemented by the actuator motor current detection. A simple over-current with the holding time is generally used to determine the actuator braking point between the roller and the tire. The conventional over-current detection is very simple and powerful, but the actual frictions at each tire are not similar due to the load and operating conditions of each side mover. The different frictions at each side tire increase the motion and moving errors at the actual positioning and parking motion.To balance the friction between the mover rollers and each tire, the non-linear disturbance force observer based on the sensorless speed estimation of the actuator motor is proposed. To keep the same friction force, the actuator motors are stopped at the same pre-fixed friction level using the estimated disturbance force and estimated actuator motor speed.Compared to the conventional over-current holding time method, the proposed method shows improved friction control performance at each wheel and mover roller. And, the moving torques are improved due to the balanced friction.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142176168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Air Insulation Characteristics and Discharge Mechanism in Electrode Structure with Fixed Multiple Particles 固定多颗粒电极结构中的空气绝缘特性和放电机制

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-07 DOI: 10.1007/s42835-024-02000-9

Dong-Young Lim, Hoyong Joo, Seung-Wook Jee

{"title":"Air Insulation Characteristics and Discharge Mechanism in Electrode Structure with Fixed Multiple Particles","authors":"Dong-Young Lim, Hoyong Joo, Seung-Wook Jee","doi":"10.1007/s42835-024-02000-9","DOIUrl":"https://doi.org/10.1007/s42835-024-02000-9","url":null,"abstract":"The high electric field generated by conductive particles significantly reduces the strength of air insulation. Thus, understanding the effects of conductive particles on the insulation characteristics of air is essential to ensure the operation and stability of a power facility based on air insulation. The purpose of this paper is to provide knowledge to understand the breakdown process caused by conductive particles. This paper presents the insulation characteristics of air in an electrode structure with fixed-multiple conductive particles, and proposes a breakdown development model based on the corona discharge mechanism. Experiments on ac breakdown in atmospheric air were conducted by varying the electrode gap and by using several types of fixed-multiple particle arrangements. It is interesting that the breakdown voltages of air were almost equal for the electrode structures with fixed-single and multiple particles. For understanding the breakdown process, the current waveforms were measured during the corona development. Corona discharges associated with multiple particles are first observed in the positive period of the applied voltage. The breakdown development model including this corona characteristics was proposed based on the electron generation mechanism during the positive and negative period of the applied voltage.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solar Powered Asymmetric Cascaded Multilevel Converter fed Multilevel Inverter 太阳能供电的非对称级联多电平转换器喂多电平逆变器

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-07 DOI: 10.1007/s42835-024-01994-6

K. Jayasudha, Vijayalakshmi Subramanian, M. Marimuthu, Ram Prakash Ponraj

{"title":"Solar Powered Asymmetric Cascaded Multilevel Converter fed Multilevel Inverter","authors":"K. Jayasudha, Vijayalakshmi Subramanian, M. Marimuthu, Ram Prakash Ponraj","doi":"10.1007/s42835-024-01994-6","DOIUrl":"https://doi.org/10.1007/s42835-024-01994-6","url":null,"abstract":"Non isolated multilevel inverters (MLI) with reduced switch components are becoming more popular to attain higher voltage levels. However, this kind of MLI increases the number of DC sources and has some issues like higher charging current, a high peak VA rating of the switches, and a high capacitor ripple voltage. This manuscript presents a modified multicell based multilevel boost inverter with a multistage DC output. It has three sections namely Boost converter, level shifter and h-bridge inverter. The proposed circuit is powered by solar photovoltaic (PV); using the Perturb and Observe Maximum Power Point method. The suggested circuit working in asymmetric mode and produces a 31-level output waveform. This topology helps to reduce the Total Harmonic Distortion, increases the output voltage levels, and reduces the common mode voltage. This topology is compared with other multilevel inverters presented in recent literature and the analysis is presented. Simulation results for various irradiance values are presented with other key factors. The experimental prototype of a 1.5 kW, single phase, 31-level inverter is designed and verified and the proportional results are substantiated.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DC Arc Failure Detection based on Division of Time and Frequency Components using Intelligence Models 基于时间和频率分量划分的直流电弧故障检测（使用智能模型

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-05 DOI: 10.1007/s42835-024-02001-8

Hoang-Long Dang, Sangshin Kwak, Seungdeog Choi

引用次数: 0

Thrust Characteristics Analysis and Parameter Optimization of Five-Phase U-Shaped Consequent-Pole PMSLM 五相 U 型后续极 PMSLM 的推力特性分析与参数优化

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-04 DOI: 10.1007/s42835-024-01993-7

Xiaozhuo Xu, Jingzhou Li, Siyuan Jiang, Baoyu Du, Shengyang Ji

{"title":"Thrust Characteristics Analysis and Parameter Optimization of Five-Phase U-Shaped Consequent-Pole PMSLM","authors":"Xiaozhuo Xu, Jingzhou Li, Siyuan Jiang, Baoyu Du, Shengyang Ji","doi":"10.1007/s42835-024-01993-7","DOIUrl":"https://doi.org/10.1007/s42835-024-01993-7","url":null,"abstract":"In order to improve the thrust characteristics of the multi-phase permanent magnet synchronous linear motor, the five-phase U-shaped consequent-pole permanent magnet synchronous linear motor (FUCP-PMSLM) with 15-slot 16-pole is taken as the research object to analyze the motor thrust and optimize the design parameters. Firstly, the equivalent magnetic circuit method is used to compare the air gap flux density of the U-shaped permanent magnet motor with the non-salient permanent magnet motor, and the influence of the motor phase number changes on the motor thrust is analyzed from the perspective of the magnetomotive force. Secondly, the Taguchi method is used for sensitivity analysis, and four sensitive parameters are selected from seven design parameters as optimization variables, the mathematical model between the motor optimization objectives and optimization variables is obtained by response surface methodology fitting, the multi-objective genetic algorithm is used to solve the problem. The finite element simulation results show that, compared with the initial motor, the average thrust of the optimized motor is increased by 5.8% and the thrust ripple is decreased by 71.3%. Finally, an experimental prototype is fabricated and tested, the test results are basically consistent with the simulation results, which verifies the effectiveness of the design parameter optimization.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141941129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Day-Ahead Prediction of PV Power Output: A One-Year Case Study at Changwon in South Korea 光伏发电量的日前预测：韩国昌原一年期案例研究

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-02 DOI: 10.1007/s42835-024-01974-w

Wanbin Son, Ye-Rim Lee

引用次数: 0

An Integrated Algorithm for Short Term Charging Load Prediction of Electric Vehicles Based on a More Complete Feature Set 基于更完整特征集的电动汽车短期充电负荷预测综合算法

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-02 DOI: 10.1007/s42835-024-01979-5

Wenting Wang, Chun Liu

{"title":"An Integrated Algorithm for Short Term Charging Load Prediction of Electric Vehicles Based on a More Complete Feature Set","authors":"Wenting Wang, Chun Liu","doi":"10.1007/s42835-024-01979-5","DOIUrl":"https://doi.org/10.1007/s42835-024-01979-5","url":null,"abstract":"The large-scale development of electric vehicles has made accurate short-term charging load prediction increasingly important for ensuring the safe operation of the power grid. To address issues of poor generalization ability and overfitting in single models, this paper proposes an integrated stacking prediction algorithm that combines three models: category boost (CatBoost), light gradient boosting machine (LGBM), and ridge regression (RR), using a stacking integration framework. The Cat–LGBM–RR model uses an internal stacking mechanism, where the RR model calculates the final prediction results after the CatBoost and LGBM models generate the necessary metadata. The effectiveness of the proposed model is demonstrated using load data from a new energy charging pile organization in a province of China. This paper’s contributions include: (1) proposing a stacking integration-based prediction algorithm; (2) providing a more thorough feature construction approach; (3) comparing and verifying the performance using enterprise real data sets and a variety of reference models. Numerical examples show that the mape of the Cat–LGBM–RR model was 4.52%. Compared with other models, it has precision advantage.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141882997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chance Constrained Day Ahead Stochastic Unit Commitment with Multiple Uncertainties 具有多重不确定性的机会受限前日随机单位承诺

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-02 DOI: 10.1007/s42835-024-01990-w

Smriti Jain, Ramesh Kumar Pachar, Lata Gidwani

{"title":"Chance Constrained Day Ahead Stochastic Unit Commitment with Multiple Uncertainties","authors":"Smriti Jain, Ramesh Kumar Pachar, Lata Gidwani","doi":"10.1007/s42835-024-01990-w","DOIUrl":"https://doi.org/10.1007/s42835-024-01990-w","url":null,"abstract":"The large scale integration of renewable energy sources and energy storage technologies is driven by energy transition. The integrated technologies pose multiple uncertainties and challenges to System operator such as inconsistency, instability, and economic infeasibility in the Unit Commitment (UC) problem. It requires addressing multiple uncertainties in UC problem while ensuring reliable and cost-effective grid operation. In this paper, a net load demand model is proposed for incorporating multiple uncertainties. Uncertainties pertaining to photovoltaic (PV) generation, load forecasts and energy storage (ES) are modeled with a joint chance constraint approach for solving stochastic day ahead UC. The chance constraint is employed to limit the probability of joint uncertainty within the predefined bounds. The next day UC schedule and costs for IEEE 39-bus system are solved by Mixed Integer NonLinear Programming (MINLP). Three case studies are performed to validate effectiveness of proposed model. Case 1 is base-system analysis of UC costs without uncertainties. Case 2 describes impacts of load forecast uncertainty on UC. In Case 3 impact of joint chance constrained multiple uncertainties on UC cost and schedule are studied with coordinated PV-ES operation. Results prove the efficacy of proposed net load demand model for optimizing system UC with multiple uncertainties.","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141882996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Data-Driven LSTM Model and Predictive Control for Vehicle Lateral Motion 数据驱动的 LSTM 模型和车辆横向运动预测控制

IF 1.9 4区工程技术

Journal of Electrical Engineering & Technology Pub Date : 2024-08-01 DOI: 10.1007/s42835-024-01982-w

Kyeong Hyeon Kim, Cheolmin Jeong, Junghyun Kim, Sanghyuk Lee, Chang Mook Kang

引用次数: 0