The great potential of intense lasers to generate quantum beams for material search is revealed by introducing some instances such as laser electron acceleration for ultrafast electron diffraction / deflectometry and las ... more
We have developed an intense terahertz wave source aiming at in-situ measurement of periodic surface structures induced by terahertz waves on solid materials with high-spatiotemporal resolution. An intense terahertz wave ... more
Feasibility for fabricating meshed pipes was investigated using laser-scan lithography and electrolytic etching onto stainless-steel pipes with an outer diameter of 100 μm. Such meshed pipes will be useful as needles for ... more
We developed a vibration measurement system by fiber Bragg gratings (FBGs) with a pulse light. The pulse light is produced by modulating a broadband light with an optical fiber switch at a modulation frequency of 40 kHz. ... more
The carbon thin film as a target for laser-driven heavy ion acceleration has been developed using the carbonization of polyimide induced by the irradiation of a XeCl excimer laser. The relationship between the depth of t ... more
Nano/microfabrication experiments on the surface of silicon solar cell are performed by ultraviolet femtosecond laser in the fluence range from 0.10-0.70 J/cm2. The surface morphology change of sample was observed by a l ... more
This paper is the fourth report of gas-insulated switchgear (GIS) history (basically after 2000s to present) in Japan from a view point of transitions of the technological developments and practical applications. Firstly ... more
To understand the electrical treeing properties at an interface, treeing breakdown tests are performed using a 1/2 needle polished to half the original thickness. The treeing properties of multilayer samples, which have ... more
Study on the Novel Grid Sheets Consisting of Conductive Material and Metal Foil and their Application as EM Wave Absorber
論文No: ページ数: 2 日付: 2020/08/01
著者: Shinichiro Yamamoto (Graduate School of Engineering, University of Hyogo), Satoru Aikawa (Graduate School of Engineering, University of Hyogo), Kenichi Hatakeyama (Graduate School of Engineering, University of Hyogo)
キーワード : novel grid sheet consisting of conductive material and metal foil，reflection characteristics，relative permittivity
Recently, EM wave absorbers are frequently applied to prevent undesired EM waves. In our previous works, EM wave absorbers consisting of a artificially designed material and a ferrite rubber mixture have been proposed. A ... more
This paper reviews on the trends in extreme weather events induced by global climate change. The number of tropical cyclones (TCs) making landfall on Japan and their intensity show no discernible long-term trend in the p ... more
Decentralized BESS Charging and Discharging Control Method for Avoiding Pole Transformer Overcapacity
論文No: ページ数: 12 日付: 2020/08/01
著者: 大久保 里矩（早稲田大学），芳澤 信哉（早稲田大学），林 泰弘（早稲田大学），河野 俊介（三菱電機（株）先端技術総合研究所），松田 啓史（三菱電機（株）電力・産業システム事業本部），板屋 伸彦（三菱電機（株）電力・産業システム事業本部），高野 富裕（三菱電機（株）先端技術総合研究所）
キーワード : 蓄電池充放電方法，柱上変圧器容量超過，分散型制御，逆潮流制御 BESS charging and discharging method，pole transformer overcapacity，decentralized control，reverse power flow control
This paper proposes a decentralized charging and discharging control method of a battery energy storage system (BESS) to prevent the over-capacity of a pole transformer (Pole-Tr) in low-voltage (LV) distribution systems ... more
In this study, high voltage is applied to the spherical electrode (diameter: 100mm), and the influence of the high electric field on the lithium ion battery (LIB) is verified. (1) Provide an air gap (20mm) only on the po ... more
The lightning damage to wind turbine has worsened. The anti-lightning receptor, which grounds the lightning current, is very important to avoid corrupting the turbine blade. The receptor proposed which is triple layer (c ... more
Evaluation of Mutual Effect between Power and Traffic Aiming Electrified Urban Transportation System Using Integrated Light Rail Transit and Distribution System Model
Recently, the integrated bigdata platform between social components is paid attention toward realization of the super smart city and society. In this paper, multiplex and integrated optimization of power system and trans ... more
Proposal of Knowledge Graph and Completion Method for Solving Social Issues: An Attempt to Improve the Bicycle Parking Environment in the University
論文No: ページ数: 11 日付: 2020/08/01
著者: 塚越 雄登（電気通信大学大学院），川村 隆浩（農業・食品産業技術総合研究機構），清 雄一（電気通信大学大学院），田原 康之（電気通信大学大学院），大須賀 昭彦（電気通信大学大学院）
キーワード : ナレッジグラフ，Linked open data，欠損推定，Translation-based model knowledge graph，Linked open data，knowledge graph completion，Translation-based model
Societies in Japan face many social issues today. To address these issues, the government is exploring ways to solve problems using data. The purpose of this study is to provide support using existing data for grasping t ... more
The influence of foreign tourists on the Japanese economy is significant. However, the number of tourists have grown at a sluggish pace in local region. In local region, there are attractive features not found in urban a ... more
While some experts have been talking about the decline of local communities, at present there are many charitable local activities for someone, for communities, and for society. However, some of inhabitants mainly elderl ... more
With the expansion of Society 5.0, the realization of a short-term development and secure implementation for a smart factory system is required. SROS2, an open-source platform applicable to industrial robots, realizes sh ... more
Data stream mining of IoT data can support operator to immediately isolate causes of equipment alarms. The challenge, however, is to keep their classifiers high purity (the data ratio with same proper class in a cluster) ... more
Movement trajectories can provide useful information for all fields. However, they may have high privacy parameters, sharing trajectory data with other operators without anonymization carries the risk of linking movement ... more
A Method for Determining Web News Suitable as Teaching Materials of Regional Study in Elementary Schools
論文No: ページ数: 7 日付: 2020/08/01
著者: Shinya Seki (Graduate School of Engineering, Kagawa University), Kazuaki Ando (Faculty of Engineering and Design, Kagawa University)
キーワード : newspaper in education，web news，support vector machine，elementary school teacher，news recommendation，NIE worksheet
Newspaper in Education (NIE) is an educational approach to utilize the newspaper as a teaching material. The purpose of our research is to support elementary school teachers by recommending Web news suitable for regional ... more
Collaborative design is a suitable approach to obtain useful and practical results within a group of people in a relatively short period of time. Our focused problem is to build a large-scale poster for promoting our col ... more
Assessment of Somatosensory Sensitivity and Activity of the Electroencephalogram using Body Surface Electrical Stimulation in Virtual Reality Environments
The aim of this study was to assess Virtual Reality (VR) based visual auditory stimulation can relieve pain. To achieve this, the impact that body surface electrical stimulation has on the body surface potentials and act ... more
PV (photovoltaic) generation has experienced the most growth among the renewable energy sources in the last several years, and the interconnection capacity of PV generations may continue to increase. However, more recent ... more
An Experimental Study on Fluctuation of Centroid Coordinates Depending on Shape of Markers at the Corresponding Point Searching of the Passive Stereo Measurement
論文No: ページ数: 9 日付: 2020/08/01
著者: 橋本 岳（静岡大学），橋本 智洋（東京大学），山本 茂広（神戸大学）
キーワード : 3次元座標計測，マーカー形状，対応点の変動，外れ値抑制，防災 3D position measurement，marker shape，fluctuation of corresponding points，avoiding outlier，disaster prevention
Corresponding point searching is the most important process at the passive stereo measurement. At the long-range target, the number of pixels of binarized target marker images are sometimes few, concretely about 100 pixe ... more
論文No: ページ数: 9 日付: 2020/08/01
著者: Theingi Zin (Department of Electronics and Electrical Engineering, Keio University), Takuro Yamaguchi (Department of Electronics and Electrical Engineering, Keio University), Masaaki Ikehara (Department of Electronics and Electrical Engineering, Keio Univ
キーワード : mixed noise removal，DWM filter，BM3D，multi-surface fitting，interpolation
Nowadays, natural images in the real world can be affected by more than one type of noise during the process of image acquisition and transmission. Many researchers have been trying to remove the mixed noise because it i ... more
As a parameters optimization method for neural networks which is applied to reinforcement learning, Evolution Strategy has been proposed. In this method, neural network parameters are represented by individuals, like ord ... more
Lettuce leaves grown in a plant factory were photographed by a digital camera and a near-infrared camera. We propose an image processing method to investigate the differences in growth depending on the kinds of lettuces ... more
Energy saving control is desirable for magnetically levitated (MAGLEV) vehicles. Hybrid magnets controlled with a zero power control system can reduce the exciting power. However, this conventional system requires a feed ... more
