For the insulation diagnosis of stator windings of generators, sampling surveys are conducted on the coils to estimate the dielectric strength of the stator winding. Previous research has relied on inferring the breakdow ... more
This paper describes measurements of progression velocity and electric field intensity at the head of plasma bullet in atmospheric pressure argon plasma jets (APJs) using two-typed probe. The probe used firstly is consis ... more
Characterizations of pulsed power output for pulsed power generator using GaN FET have been evaluated and compared with using SiC-MOS FET. The fast rise/fall time of output voltage without the dependance on the dummy loa ... more
G-Value of Hydrogen Peroxide Generated by Water Radiolysis with Irradiation of Pulsed Intense Relativistic Electron Beam
論文No: ページ数: 2 日付: 2024/12/01
著者: Soichi Hasegawa (Department of Nuclear Technology, Nagaoka University of Technology), Kazumasa Takahashi (Department of Electrical, Electronics and Information Engineering, Nagaoka University of Technology), Toru Sasaki (Department of Science of Technology Innovation, Nagaoka University of Technology/Department of Electrical, Electronics and Information Engineering, Nagaoka University of Technology), Takashi Kikuchi (Department of Nuclear Technology, Nagaoka University of Technology/Department of Electrical, Electronics and Information Engineering, Nagaoka University of Technology/Extreme Energy-Density Research Institute, Nagaoka University of Technology), Go Imada (Department of Engineering, Niigata Institute of Technology/Extreme Energy-Density Research Institute, Nagaoka University of Technology)
キーワード : pulsed intense relativistic electron beam (PIREB)，dose，G-value，hydrogen peroxide
G-value of hydrogen peroxide irradiated by pulsed intense relativistic electron beam (PIREB) was demonstrated. The PIREB with a kinetic energy of up to 2 MeV and pulse duration of 100 ns (FWHM) was generated using the in ... more
Technology Trends of Industrial Heat Pumps for Expanding their Applications
論文No: ページ数: 4 日付: 2024/12/01
著者: 甲斐田 武延（（一財）電力中央研究所）
キーワード : ヒートポンプ，TRL，COP，温度リフト，二次エネルギー価格比 heat pump，technology readiness level，coefficient of performance，temperature lift，electricity-fuel price ratio
The importance of industrial heat pumps for decarbonization has gained widespread recognition. Research, development and demonstration of high-temperature heat pumps with supply of 100℃ or higher are being accelerated es ... more
In this paper, the authors propose an ensemble forecasting method using multiple individuals for short-time-ahead (one hour ahead) insolation forecasting by using neuro evolution (NE), in which a genetic algorithm is app ... more
Impacts of Quadrature-axis Equivalent Circuit Model of Turbine Generator on Simulation Results of Frequency Change in Grid Fault
論文No: ページ数: 10 日付: 2024/12/01
著者: 青木 廉（（一財）電力中央研究所），天野 博之（（一財）電力中央研究所）
キーワード : タービン発電機，横軸リアクタンス，周波数変化率，インバータ脱落 turbine generator，quadrature-axis reactance，rate of change of frequency，inverter trip
In power system dynamic analysis, especially voltage analysis at load disconnection, it is known that the turbine generator model considering quadrature axis transient reactance Xq' (called LGT =5 in CRIEPI's Power Syste ... more
When a constraint violation occurs due to adding a new load to distribution systems, it can be resolved by reconfiguring the distribution systems by changing the states of switches and/or by minimum necessary investment. ... more
During power outages, blackout sections could be recovered early by switching the states of switchgears in distribution networks. The scale of the remaining power outage depends on the initial network configuration. Ther ... more
This paper proposes the application of IEC 61850 standards to manage communications for output curtailment setpoints directed at generators with non-firm connection agreements. The unique requirements of such communicati ... more
For the efficient lightning protection design, analysis of actual outages is essential. We estimate the strokes causing surge protection device burnout faults using two ways. One method considers the location, and the ot ... more
Brief Screening Tools for Cognitive Impairment Using Motor Evoked Potentials in a Non-Active Manner
論文No: ページ数: 6 日付: 2024/12/01
著者: 片瀬 瑛仁（名古屋工業大学大学院工学研究科），加藤 昇平（名古屋工業大学大学院工学研究科），佐久間 拓人（名古屋工業大学大学院工学研究科），村上 丈伸（鳥取大学医学部医学科）
キーワード : 運動誘発電位，認知機能障害，経頭蓋磁気刺激法 motor evoked potentials，cognitive impairment，transcranial magnetic stimulation
The number of patients with dementia is increasing, and early detection of dementia is important to reduce the burden on medical institutions. Because Alzheimer's disease accounts for the largest proportion of causative ... more
Proposal and Evaluation of a Pitch Estimation Model Based on Reconstruction of the Spectrum of Input Sound by Using Timbre Information and Pitch Information
論文No: ページ数: 7 日付: 2024/12/01
著者: 川 凌司（名城大学大学院理工学研究科），坂野 秀樹（名城大学大学院理工学研究科），旭 健作（名城大学大学院理工学研究科）
キーワード : 自動採譜，多重音高推定，音楽情報検索，深層学習 automatic music transcription，multi-pitch estimation，music information retrieval，deep learning
Automatic music transcription (AMT) is a task that automatically generates music score from the sound of music. Pitch estimation is one of the most important technology in AMT, and its accuracy strongly affects the quali ... more
In Japan, head-on collisions involving automobiles constitute approximately 30% of accidents between vehicles, placing them among the leading causes. Therefore, our research focuses on preventing head-on collisions by st ... more
Individual identification methods using ICT are required to reduce the workload of dairy farmers. Our research focuses on animal vocalizations as one of the resources useful for individual identification. In previous stu ... more
Visually induced eye movements in larval fish, especially those in zebrafish have been intensively studied to understand neural mechanisms of sensory-motor transformation and motor learning. In this study, we developed a ... more
Optimized MAC Protocol for Throughput and Fairness in Multi-hop Adhoc WLANs
論文No: ページ数: 8 日付: 2024/12/01
著者: Takumi Sanada (The Faculty of Information Science and Technology, Aichi Prefectural University), Xuejun Tian (The Faculty of Information Science and Technology, Aichi Prefectural University), Takashi Okuda (The Faculty of Information Science and Technology, Aichi Prefectural University)
キーワード : WLANs，multi-hop，MAC，Backoff，throughput
Wireless local area networks (WLANs) have become increasingly popular and widely deployed. The medium access control (MAC) protocol is one of the important technologies in WLANs and directly affects communication efficie ... more
A cyber physical system that enables to evaluate the electromagnetic (EM) field of the wireless communication environment in which mobile objects exist is proposed. The high-speed electromagnetic analysis is achieved by ... more
Wire-free robot not using wires between links is proposed by utilizing wireless power transmission and communication. Attaching and detaching the links easily enable to install the arms into a facility on demand. Conside ... more
Power Control in Nano-Satellites Using Optimization Methods
論文No: ページ数: 9 日付: 2024/12/01
著者: 松本 優樹（東京電機大学大学院 理工学研究科），金丸 真奈美（東京電機大学大学院 理工学研究科），塚原 彰彦（東京電機大学大学院 理工学研究科），田中 慶太（東京電機大学大学院 理工学研究科）
キーワード : MPPT制御，山登り法，粒子群最適化法，遺伝的アルゴリズム Maximum Power Point Tracking (MPPT) control，Perturbation and Observation (P&O)，Particle Swarm Optimization (PSO)，Genetic Algorithm (GA)
This study aims to develop a high-power acquisition system for nano-satellites. Microcomputers are utilized for power control of nano-satellites, considering size and power consumption. In this study, Perturbation & Obse ... more
For the purpose of creating learning support tool for singing instruction, three acoustical parameters based on Singer's formant shown in classical singing voice is defined and discussed. Since Singer's formant is consid ... more
Data Augmentation Method Using Generative Model for Skeleton-based Human Action Recognition
論文No: ページ数: 8 日付: 2024/12/01
著者: 濵部 翔太（名城大学），山田 啓一（名城大学）
キーワード : 人物行動認識，データ拡張，生成モデル，拡散モデル human action recognition，data augmentation，generative model，diffusion model
Human action recognition from video images generally requires a large amount of training data, but often only a limited amount of data is available. This paper proposes a data augmentation method using a generative model ... more
This paper proposes discrete spider monkey optimization with dynamic multiple populations for a vending machine column optimization problem. For beverage vending machines, there is a need to reduce the number of vending ... more
Multiple Content Selections Using Digital Signage Considering Changes in Purchasing Intentions
論文No: ページ数: 8 日付: 2024/12/01
著者: 前田 康成（北見工業大学地域未来デザイン工学科）
キーワード : デジタルサイネージ，複数回のコンテンツ選択，購買意欲，センサー，統計的決定理論 digital signage，multiple content selections，purchasing intention，sensor，statistical decision theory
There is a lot of previous research on sales promotion strategy using digital signage. Maximization of expected sales is one of important topics on sales promotion strategy using digital signage. In the previous research ... more
Improvement of the Typhoon Damage Prediction System for Electric Power Distribution Equipment (RAMPT): Proposal of a Correction Method Considering the Tree and Information of Landslide Hazard Prediction
論文No: ページ数: 9 日付: 2024/12/01
著者: 遠藤 尚希（（一財）電力中央研究所），朱牟田 善治（（一財）電力中央研究所），高橋 健吾（（株）電力計算センター）
キーワード : 配電設備，被害予測，台風，土砂災害，倒木 electric power distribution equipment，damage prediction，typhoon，sediment disaster，fallen tree
Risk assessment and management system for power lifeline against typhoon (RAMPT), developed by the CRIEPI, is a system capable of predicting the amount of damage caused to distribution equipment based on wind forecasts. ... more
In this paper, we propose a method for classifying multiple gait patterns including abnormal movements when walking on stairs using micro-Doppler radar. We measured three types of movements while walking down the stairs, ... more
This paper introduces a parallel computation of Nested-Layer Particle Swarm Optimization (NLPSO) approach for investigating bifurcation points in continuous-time dynamical systems. The method offers efficient bifurcation ... more
Investigation of Electric Field Coupling Wireless Power Transfer System with Immittance Converters
論文No: ページ数: 10 日付: 2024/12/01
著者: 広沢 友貴（青山学院大学），御園 惟人（青山学院大学），佐藤 佑樹（青山学院大学），松本 洋和（青山学院大学）
キーワード : イミタンス変換器，ワイヤレス送電システム，電界結合方式 immittance converter，wireless power transfer system，capacitive wireless power transfer
This study proposes a capacitive wireless power transfer system using immittance converters. In this system, two immittance converters were set in the front and back stages of the coupler, enabling the suppression of the ... more
It is important to drive an IPM motor system stably. However, unstable oscillation at the DC input has been reported. According to the impedance method, the stability is assured when the input admittance of the drive sys ... more
Inductors used in power converter circuits are subjected to various currents when rectangular voltage waveforms are applied. Under these conditions, instead of forming a hysteresis loop, the magnetic material in the indu ... more
