出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.125, no.1, pp.29-33, 2005 (Released:2007-02-02)

本記事に「抄録」はありません。
著者
瓜生原 信輔
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌E(センサ・マイクロマシン部門誌) (ISSN:13418939)
巻号頁・発行日
vol.123, no.8, pp.271-278, 2003 (Released:2003-11-01)
参考文献数
10
被引用文献数
2 2

“Suica" is our contact-less IC-card's nickname: Super Urban Intelligent CArd. There are two types of Suica: 4.5 million Suica Commuter Pass with the stored fare (SF) function and 2 million Suica IO (SF) Cards have already been procured for ticket gate system. Suica can be used without taking the card from the pass-case, and the necessary fare will be extracted from the card automatically at the gate. Suica can be used repeatedly with the re-writing and reloading function. Suica Pass can be re-issued with the remaining stored fare when it is lost. There are 5.84 million Suica holders (about 2.94 million Suica Season Pass holders and 2.9 million Suica IO Card holders) as of 24, March 2003. Average reloading value amount is about 3, 000 Yens. There are almost 3 million transactions (not including the usage of Suica Pass inside the pass zone).
著者
畑 正
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.123, no.7, pp.410-413, 2003-07-01 (Released:2008-04-17)
参考文献数
3
著者
北野 淳一
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.124, no.8, pp.520-523, 2004-08-01 (Released:2008-04-17)
参考文献数
1
被引用文献数
3 1
著者
丹下 吉雄 松井 哲郎
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)
巻号頁・発行日
vol.144, no.1, pp.21-27, 2024-01-01 (Released:2024-01-01)
参考文献数
25

In this paper, we propose a self-tuning algorithm by which we can achieve autonomous engineering including model identification and control parameter tuning on the edge-type MPC (Model Predictive Control). In the model identification algorithm, offset estimation is introduced in order to replace step response tests. We compare the control performance of the self-tuning edge-type MPC with those of PID control and offline-tuned edge-type MPC for a MIMO stir process model. As a result, the proposed self-tuning edge-type MPC achieves faster tracking performance without any pre-tuning.
著者
田中 伸一郎
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.126, no.8, pp.546-549, 2006-08-01 (Released:2007-02-06)
参考文献数
6
被引用文献数
1 1

本記事に「抄録」はありません。
著者
渡邉朝紀
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.117, no.5, pp.289-292, 1997-04-20 (Released:2008-04-17)
参考文献数
3
著者
白崎 圭亮 北内 義弘
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)
巻号頁・発行日
vol.137, no.4, pp.265-273, 2017-04-01 (Released:2017-04-01)
参考文献数
16
被引用文献数
7

It is difficult to assess how transient stability of trunk transmission power systems may be affected by a system fault under the conditions created by the widespread use of renewable energy (RE) because it may greatly differ depending on power system conditions such as the operation statuses of generators and RE, and also on whether or not any RE is tripped after the fault, for example. Then we developed photovoltaics (PV) generation model for transient stability analysis and defined a scenario for the widespread use of RE in order to perform an analysis using this power system model. We confirmed that this made it easy to identify the impacts on transient stability and their causes even when different power system conditions contribute in a complex manner.
著者
安喰 浩司 渡邉 朝紀
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.118, no.9, pp.514-517, 1998-09-01 (Released:2008-04-17)
参考文献数
8
著者
前川 佐理
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌D(産業応用部門誌) (ISSN:09136339)
巻号頁・発行日
vol.143, no.8, pp.NL8_11, 2023-08-01 (Released:2023-08-01)

Our research focuses on power electronics and motor control. In this document we present our research topics.
著者
江川 正尚
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)
巻号頁・発行日
vol.129, no.2, pp.253-256, 2009-02-01 (Released:2009-02-01)
参考文献数
9
被引用文献数
1

On July 23, 1987, a very hot day, the largest wide-area power outage occurred in Kanto-Area, Japan. The cause was a voltage collapse on the bulk power network of Tokyo Electric Power Company, due to the abnormal rate of demand rising following resume after lunch break. Aggressive studies on voltage collapse throughout industry and university have led to great advances in power system stability. This essay describes the detail record of the outage, the applied countermeasures, and the inside story when the multiple voltage solutions of power flow on actual power system were found out for the first time.
著者
高道 慎之介
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.141, no.2, pp.93-96, 2021-02-01 (Released:2021-02-01)
参考文献数
9

1.はじめにボイスチェンジャー(音声変換)とは,音声を人工的に加工・変換する技術である。ボイスチェンジャーという単語から読者の皆さまは何を想起するだろうか。ヘリウムガス,映画「キングコング」,アニメ「名探偵コナン」・「ドラえもん」,それともVTuber(Virtual YouTuber)だろ
著者
井上 博之 金森 健人 酒見 由美 菅野 哲 稲村 勝樹
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)
巻号頁・発行日
vol.143, no.8, pp.743-753, 2023-08-01 (Released:2023-08-01)
参考文献数
45

To realize connected and/or self-driving vehicles for a mobility environment, it requires an authentication mechanism to prevent spoofing of on-board units of the vehicle and a mechanism to prevent eavesdropping and tampering of communication data between an on-board unit and servers in the cloud. Considering the huge number of vehicles in the system, an authentication method is required to mitigate the complexity of operation and management for the number of vehicles. In this paper, we propose a data utilization system that securely stores in-vehicle LAN data, which consist of control data flowing inside a vehicle, in the cloud in real time, and provides this information securely to third parties such as vehicle users, car dealers, and non-life insurance companies. The system uses ID-based cryptography as a mutual authentication method between on-board units and the data collection servers, and uses a key generated from the ID of an on-board unit to ease the key management. We integrate the management information of the vehicle and the authentication key of the vehicle in the system, and thus reduces the complexity of the operation and the key management.