IEEJ Transactions on Electrical and Electronic Engineering最新文献

Determining Reserve Power Shared by Each Consumer to Aggregate Solid Oxide Fuel Cells and Storage Batteries for Frequency Containment Reserve 确定每个消费者共享的储备功率，以聚合固体氧化物燃料电池和蓄电池以实现频率控制储备

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-06-12 DOI: 10.1002/tee.70083

Nanae Kaneko, Yu Fujimoto, Wataru Hirohashi, Yasuhiro Hayashi, Tomoyuki Hirai, Shota Tajima, Toshinari Momose

引用次数: 0

On-Chip Analytical Method for Investigating Protrusive Forces in Growing Plant Roots† 芯片上分析方法研究植物根系生长中的突出力

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-05-30 DOI: 10.1002/tee.70081

Jing Li, Michitaka Notaguchi, Isaku Kanno, Hirotaka Hida

{"title":"On-Chip Analytical Method for Investigating Protrusive Forces in Growing Plant Roots†","authors":"Jing Li, Michitaka Notaguchi, Isaku Kanno, Hirotaka Hida","doi":"10.1002/tee.70081","DOIUrl":"https://doi.org/10.1002/tee.70081","url":null,"abstract":"In this study, we present an on-chip analytical method using a microfluidic device to characterize the mechanical properties in growing roots. Roots are essential organs for plants and grow under heterogeneous conditions in soil. Especially, the mechanical impedance in soil significantly affects root growth. Understanding the mechanical properties of roots and the physical interactions between roots and soil is important in plant science and agriculture. However, an effective method for directly evaluating the mechanical properties of growing roots has not been established. To overcome this technical issue, we developed a polydimethylsiloxane (PDMS) microfluidic device integrated with a cantilevered sensing pillar for measuring the protrusive force generated by the growing roots. Using the developed device, we analyzed the mechanical properties of the roots in a model plant, Arabidopsis thaliana. The root growth behavior and the mechanical interaction with the sensing pillar were recorded using a time-lapse microscopy system. We successfully quantified the mechanical properties of growing roots including the protrusive force and apparent Young's modulus based on a simple physical model considering the root morphology. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 7","pages":"1134-1140"},"PeriodicalIF":1.0,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255869","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

Estimation Method for Thévenin Equivalent Impedance Using Steady-State Fluctuation Data of Renewable Energy Output and Frequency 基于可再生能源输出和频率稳态波动数据的等效阻抗估计方法

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-05-27 DOI: 10.1002/tee.70072

Jun Tamura, Keita Tokumitsu, Hiroyuki Amano

引用次数: 0

Intelligent Prediction of Dielectric Strength for Long Air Gaps at High Altitudes Based on Regularization-Logistic Regression 基于正则化-逻辑回归的高海拔长气隙介质强度智能预测

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-05-07 DOI: 10.1002/tee.70051

Zhibin Qiu, Wenhao Chen, Yu Song, Ting Peng, Chen Liu

{"title":"Intelligent Prediction of Dielectric Strength for Long Air Gaps at High Altitudes Based on Regularization-Logistic Regression","authors":"Zhibin Qiu, Wenhao Chen, Yu Song, Ting Peng, Chen Liu","doi":"10.1002/tee.70051","DOIUrl":"https://doi.org/10.1002/tee.70051","url":null,"abstract":"Air discharge originates from the interaction between electric field (EF) and the meteorological environment, and the dielectric strength of a long air gap is affected by both EF distribution and atmospheric parameters. A regularization-logistic regression (R-LR) model is proposed for the accurate calculation of long air gap discharge voltage at high altitudes. Using 4 meteorological features and 9 EF features as inputs for the R-LR model, the R-LR model was trained using discharge test data from rod-plane air gaps at altitudes of 55–4300 m. The trained model was used to predict the dielectric strength of rod-plane air gaps at an altitude of 5000 m. The prediction results of the R-LR model were compared with those of random forest (RF), support vector classifier (SVC) and k-nearest neighbor (KNN) models. The results showed that the accuracy and generalization of the R-LR model were better than those of the other models. The MAPE of the R-LR model on the test set was 1.32%. The model was validated by using the rod-plane air gap discharge test data under different meteorological environments in a plain area. The predicted discharge voltage values were basically consistent with the test values, further demonstrating the effectiveness and generalizability of the model. This study can offer a reference for predicting the dielectric strength of air gaps under different meteorological environments in high altitude areas. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 8","pages":"1148-1156"},"PeriodicalIF":1.0,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144574139","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

Hierarchical Optimization Combining Parameter and Topology for Outer Rotor in-Wheel Motors 外转子轮内电机参数与拓扑相结合的层次优化

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-05-06 DOI: 10.1002/tee.70055

Kehan Yan, Zunyan Hu, Jianqiu Li, Liangfei Xu, Minggao Ouyang

{"title":"Hierarchical Optimization Combining Parameter and Topology for Outer Rotor in-Wheel Motors","authors":"Kehan Yan, Zunyan Hu, Jianqiu Li, Liangfei Xu, Minggao Ouyang","doi":"10.1002/tee.70055","DOIUrl":"https://doi.org/10.1002/tee.70055","url":null,"abstract":"In-wheel motor (IWM) optimization is critical for its vehicle integration. However, standard algorithms are frequently ineffective when applied to the complex IWM optimization problem, resulting in suboptimal performance and excessive computational costs. This problem arises from the diverse and conflicting objectives, namely peak torque, torque ripple, efficiency, and weight. Thus, this paper introduces a hierarchical optimization method that integrates parameter and topology optimization according to different objectives sequentially. The upper layer employed a computationally fast surrogate model to explore the parameter spaces extensively and select the working point for torque ripple reduction. Then, the lower layer utilizes the best parameter optimization results as constraints, enabling further refinement of the permanent magnet (PM) topology via accurate finite element analysis (FEA). As a result, a radial outer rotor IWM was optimized using this method. Convergence and prototype analyses demonstrate the reliability of the hierarchical optimization with a 10.6% and 1.6% increase in peak torque and efficiency, respectively, and a 43.2% reduction in the torque ripple rate compared with a traditionally engineered counterpart. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 8","pages":"1282-1293"},"PeriodicalIF":1.0,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573708","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

A Mixed Integer-Linear Programming Model for Solving the Hydroelectric Unit Maintenance Scheduling Problem 求解水电机组维修调度问题的混合整数-线性规划模型

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-05-01 DOI: 10.1002/tee.70050

Yuehao Tang

{"title":"A Mixed Integer-Linear Programming Model for Solving the Hydroelectric Unit Maintenance Scheduling Problem","authors":"Yuehao Tang","doi":"10.1002/tee.70050","DOIUrl":"https://doi.org/10.1002/tee.70050","url":null,"abstract":"This paper presents an optimization modeling approach utilizing Mixed Integer Linear Programming (MILP) techniques to address the hydroelectric unit maintenance scheduling problem for British Columbia Hydro and Power Authority (BC Hydro) systems. The research leverages specialized linear formulations and algorithms to solve the combinatorial maintenance problem in large-scale hydroelectric systems. The primary objective is to determine the optimal timing and sequencing for each unit outage within the system, ensuring system productivity, reliability, and operability. The proposed method involves a detailed MILP formulation that considers various constraints. A novel ‘maintenance shape’ algorithm is designed to handle the nonlinearity arising from the maintenance continuity preference, ensuring that all units' maintenance activities within each plant are arranged sequentially without breaks. Results from the case study illustrate the systematic effects of unit maintenance on BC Hydro's competitiveness in the electricity market. The model can be extended to include more plants and reservoirs, providing a valuable tool for BC Hydro and similar utilities in strategically managing their maintenance operations. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 8","pages":"1165-1175"},"PeriodicalIF":1.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573633","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

Constrained State Estimation with Probabilistic Error Model for Underdetermined Systems Such as Distribution Network 基于概率误差模型的配电网络等欠定系统约束状态估计

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-05-01 DOI: 10.1002/tee.70054

Masatoshi Kumagai, Masahiro Watanabe

{"title":"Constrained State Estimation with Probabilistic Error Model for Underdetermined Systems Such as Distribution Network","authors":"Masatoshi Kumagai, Masahiro Watanabe","doi":"10.1002/tee.70054","DOIUrl":"https://doi.org/10.1002/tee.70054","url":null,"abstract":"Constrained state estimation (CSE) clarifies the interval of the feeder voltage profile of an unobservable distribution network containing fewer telemetric sensors than state variables to be estimated. By using the given information about the power flow equations and network operating ranges such as maximum load and photovoltaic generator ratings, CSE provides the estimation interval that minimizes the square error against the partial telemetric measurements while satisfying the network operating ranges. We also developed a probabilistic model of the estimation error outside the estimation interval characteristic of the CSE algorithm. The probabilistic error model is derived by superposition of the error distribution around the arbitrary estimation within the estimation interval. The validity of the probabilistic error model was confirmed by a case study simulation on a benchmark network, in which the model-based probabilistic error distribution well explained the simulation-based estimation errors. This result is necessary to understand the estimation accuracy of CSE for the voltage control application of the distribution network. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 8","pages":"1186-1194"},"PeriodicalIF":1.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573639","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

A Vision-Based Technique for Ice-Coating Shape Measurement of Transmission Lines Conductor 基于视觉的输电线路导体覆冰形状测量技术

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-30 DOI: 10.1002/tee.70052

Ye Zhang, Luyao Wang, Pengchao Zhai, Long Zhao

{"title":"A Vision-Based Technique for Ice-Coating Shape Measurement of Transmission Lines Conductor","authors":"Ye Zhang, Luyao Wang, Pengchao Zhai, Long Zhao","doi":"10.1002/tee.70052","DOIUrl":"https://doi.org/10.1002/tee.70052","url":null,"abstract":"Icing of overhead transmission lines can affect the safe operation of the power distribution and transmission grid due to the additional weight load of the accumulated ice-coating on transmission line conductors. Analyzing the shape of ice accumulation on transmission line conductors helps promote the calculation of ice thickness and weight. In this paper, we present a system for analyzing the shape of ice accumulation based on two digital cameras and an offline processing algorithm. The two cameras separately acquire an image sequence of the iced conductor from the top view and the front view. Then, an image processing algorithm extracts the conductor contour and measures both the diameters of the iced conductor images captured by the two cameras at the same point. An irregular-shape ice coating accumulation model is established and used to describe the cross-sectional ice coating shape of the accumulated ice on the conductor. Finally, a mathematical model for the ice coating weight is established. The proposed system was tested in laboratory experiments using two digital cameras with good low-temperature resistance. The experimental analysis results show that the average error ratio of the proposed irregular shape ice accumulation model in terms of area and thickness fitting are 0.0398 and 0.0612, respectively. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 8","pages":"1176-1185"},"PeriodicalIF":1.0,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144574273","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

A Specialized Variational Autoencoder for Cost-Efficient Pedestrian Trajectory Prediction 一种高效行人轨迹预测的专用变分自编码器

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-28 DOI: 10.1002/tee.70053

Dongchen Li, Zhimao Lin, Jinglu Hu

{"title":"A Specialized Variational Autoencoder for Cost-Efficient Pedestrian Trajectory Prediction","authors":"Dongchen Li, Zhimao Lin, Jinglu Hu","doi":"10.1002/tee.70053","DOIUrl":"https://doi.org/10.1002/tee.70053","url":null,"abstract":"The prediction of pedestrian trajectories represents a crucial and widely discussed topic in the field of AI-driven traffic scenarios. The prediction of pedestrian trajectories is constrained by two factors. First, pedestrians do not have the same traffic rule constraints as vehicles. Second, the computational power of in-vehicle systems is limited. This renders the application of traditional methods challenging. Previous methods have been observed to utilize redundant information, which can result in feature imbalance and the potential for model overfitting. In light of these limitations, we propose a lightweight conditional variational autoencoder model with post-process (L-CVAE-P) for pedestrian prediction scenarios. The L-CVAE-P focuses on the efficient interaction of multidimensional features to achieve a comprehensive enhancement of the model for real-world use. The model is tested on two public datasets and achieved state-of-the-art performance, while maintaining efficiency. The experimental results demonstrate that our work has developed and optimized a pedestrian trajectory prediction model for practical applications. © 2025 The Author(s). IEEJ Transactions on Electrical and Electronic Engineering published by Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 8","pages":"1240-1249"},"PeriodicalIF":1.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/tee.70053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144574284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Searching for Stiffness Singularity Using Directional Palpation by a Microfinger and its Scanning Condition Dependence 微指定向触诊刚度奇异点搜索及其扫描条件依赖性

IF 1 4区工程技术

IEEJ Transactions on Electrical and Electronic Engineering Pub Date : 2025-04-28 DOI: 10.1002/tee.70029

Yuto Hori, Satoshi Konishi

{"title":"Searching for Stiffness Singularity Using Directional Palpation by a Microfinger and its Scanning Condition Dependence","authors":"Yuto Hori, Satoshi Konishi","doi":"10.1002/tee.70029","DOIUrl":"https://doi.org/10.1002/tee.70029","url":null,"abstract":"Minimally invasive treatment has recently emerged as a dominant procedure, as it reduces the patients' physical burden. However, it is still limited by the lack of tactile-sensation feedback from the invading device. We have reported a technology for conducting stiffness-singularity search in an elastic object based on palpation using a microfinger that was integrated with an artificial muscle and a tactile sensor. Here, to advance the application of the technology in medical diagnosis, we focused on tumor detection facilitated by palpation diagnosis using the microfinger. Notably, the miniaturized microfinger exhibits bending actuation, which imparts it with directivity. We have demonstrated an efficient searching method for singularities based on the directivity of the microfinger. Here, we estimated the condition dependence of the search method, as it is key to achieving the application of palpation diagnosis, and confirmed the accuracy of the proposed technology for estimating singularities. Thus, we present a highly efficient search method that offers feedback on tactile information. © 2025 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.","PeriodicalId":13435,"journal":{"name":"IEEJ Transactions on Electrical and Electronic Engineering","volume":"20 7","pages":"1128-1133"},"PeriodicalIF":1.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144256565","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