著者

東盛 良夫

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.113, no.2, pp.177-184, 1993

被引用文献数

1

---

Electric power is in great demand, and it is transmitted to distant places for consumers with high efficiency, where various insulators are being used for power transmission and distribution line for insulation.<br>Insulators contaminated by salt particles have been causes for flashovers on the surface under high voltage in humid climate and light rain. Rapid salt contamination of the insulator surface by typhoons has been investigated on the campus of University of the Ryukyus for several years.<br>The results obtained from the exposure tests are:<br>(1) Accumulative contamination of the insulator surface occurred always on the bottom surface of the insulators, and on the upper surface of insulators during the period without rainfall.<br>(2) The extent of contamination of the pin-type insulators with the saltproof dishes was 1/2_??_1/6 in comparison to that of pin-type insulators without ones.<br>(3) The salt contamination of the insulator surfaces is almost always influenced by wind speed and precipitation.<br>(4) Flashover voltage of salt contminated insulators by typhoons drops to approximately 1/10 of that for clean and dry insulators.

著者

松尾 康平 海住 太郎 中園 智晶 渡邉 慶 鈴木 隆文

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.136, no.9, pp.1324-1334, 2016-09-01 (Released:2016-09-01)

参考文献数

30

---

Dual-task paradigm is a behavioral procedure in which subjects are required to perform two independent tasks in parallel, each of which involves a distinct stimulus-response association that leads to a unique goal. Although dual tasks are widely used in human studies, they are seldom used in animals. One such rare case was a rat simultaneous temporal processing (STP) task, in which rats were asked to time two different intervals simultaneously(1). However, there are a few limitations in this paradigm, such that, for example, each of the two component tasks was not clearly associated with a unique stimulus-response association. In this report, in order to better characterize temporal dual-task performance in rats, we developed a modified version of the STP task that was comprised of two clearly-divided component tasks, and equipped our experimental system with a novel video-based motion tracking system. We show that even under this more rigidly controlled dual-task setting, rats are able to time two different intervals virtually without interference, and that our tracking system can simultaneously detect head-direction and body-location of a rat with high accuracy. These results suggest that the present experimental paradigm should be useful for investigating cognitive processes that underlie dual-task performance at both the behavioral and neuronal levels.

著者

西川 尚男 菅原 俊一 栗原 塁 青木 努 小上 泰司

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.125, no.7, pp.680-686, 2005 (Released:2005-10-01)

参考文献数

20

被引用文献数

4 3

---

It is well known that the operation with low humidified reactants accelerates cell voltage loss of PEFC. On the other hand, the mechanism of the voltage loss is not clear. On this study, two kinds of cells which have different thickness membrane (15 and 30μm) were evaluated under operation with low humidified reactants to clarify the voltage loss mode. The study indicates that there are two different cell voltage loss modes. For 15μm cell (a thin membrane cell), the cell voltage decayed along with open circuit voltage decrease with H2 crossover increase. It is the case that H2 crossover depresses cell voltage. For 30μm cell (a thick membrane cell), the cell voltage decayed along with open circuit voltage decrease without H2 crossover increase. This decay mechanism of voltage loss without H2 crossover was focused to study. New methods for measuring humidity distribution and current distribution in a cell were introduced for further analyze. It is found that effective catalyst area loss in cathode catalyst layer could depress cell voltage.

著者

中野 友雄

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.97, no.10, pp.841-848, 1977-10-20 (Released:2008-04-17)

参考文献数

7

被引用文献数

1

著者

高木 雅昭 岩船 由美子 山本 博巳 山地 憲治 岡野 邦彦 日渡 良爾 池谷 知彦

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 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society (ISSN:03854213)

巻号頁・発行日

vol.130, no.7, pp.651-660, 2010-07-01

参考文献数

19

被引用文献数

3 1

---

In the power sector, the national government has set the goal that the introduction of PV reaches 53 million kW by 2030. However, large-scale introduction of PV will cause several problems in power systems such as surplus electricity. We need large capacity of pumped storages or batteries for the surplus electricity, but the construction costs of these plants are very high. On the other hand, in the transport sector, Electric Vehicle (EV) is being developed as an environmentally friendly vehicle. To promote the diffusion of EV, it is necessary to build infrastructures that can charge EV in a short time; a battery switch station is one of the solutions to this problem. At a station, the automated switch platform will replace the depleted battery with a fully-charged battery. The depleted battery is placed in a storage room and recharged to be available to other drivers. In this study, we propose the use of station's battery as a countermeasure for surplus electricity of PV and evaluate the economic value of the proposed system. We assumed that 53 million kW of PV is introduced in the nationwide power system and considered two countermeasures for surplus electricity: (1) Pumped storage; (2) Battery of station. The difference in total annual cost between Pumped case and Battery case results in 792.6 billion yen. Hence, if a utility leases the batteries from stations fewer than 792.6 billion yen, the utility will have the cost advantage in Battery case.

著者

畑 良輔

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.121, no.2, pp.123-126, 2001-02-01 (Released:2008-04-17)

参考文献数

4

被引用文献数

3 3

著者

大田 明博 臼田 孝 中野 英俊

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.6, pp.203-208, 2003 (Released:2003-09-01)

参考文献数

8

---

The calibration procedures of charge amplifier (CA) on vibration acceleration standard are described. The calibration principle and fundamental calibration procedures are explained in detail. Typical commercial CAs (3 types, 4 CAs) are evaluated in terms of the frequency sensitivity gain, the long-term stability, the linearity for input charge, the linearity for gain setting and the effects of environmental conditions (temperature and humidity). The maximum discrepancy in the sensitivity gain is approximately 4 % among the tested CAs. A relative sensitivity gain difference of 1.5 % still remains when CAs of the same type are compared. It should be mentioned that a difference of 1.5 % is not negligible. Such a large difference has not been commonly observed up to the present time. Based on these experimental results, the technical guides for charge amplifier calibration are summarized.

著者

高木 利夫 武藤 藤太郎

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.90, no.4, pp.554-560, 1970-04-20 (Released:2008-04-17)

参考文献数

14

著者

服部 正典 大須賀 昭彦 関 俊文 一色 正男 本位田 真一

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 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society (ISSN:03854221)

巻号頁・発行日

vol.123, no.11, pp.2010-2019, 2003-11-01

参考文献数

12

被引用文献数

1

---

This paper describes a &ldquo;Ubiquitous Personalize Agent&rdquo; and it&rsquo;s application: &ldquo;Shopping assistance service&rdquo; for ubiquitous environments. Ubiquitous personalize agent is realized based on context reasoning technology. It can determine contexts of users by referring a lot of data which can be retrieved from devices in ubiquitous environments. We also have had an experimental trial of this service. In this paper, we state the technology, service, and evaluation on the experimental trial.

著者

丸林 元 鈴木 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.121, no.11, pp.754-757, 2001-11-01 (Released:2008-04-17)

参考文献数

6

被引用文献数

3 2

著者

孫 悠洛 鎌野 琢也 安野 卓 鈴木 茂行 原田 寛信

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.124, no.10, pp.2148-2154, 2004 (Released:2005-01-01)

参考文献数

32

被引用文献数

2 1

---

This paper describes the generation of adaptive gait patterns using new Central Pattern Generators (CPGs) including motor dynamic models for a quadruped robot under various environment. The CPGs act as the flexible oscillators of the joints and make the desired angle of the joints. The CPGs are mutually connected each other, and the sets of their coupling parameters are adjusted by genetic algorithm so that the quadruped robot can realize the stable and adequate gait patterns. As a result of generation, the suitable CPG networks for not only a walking straight gait pattern but also rotation gait patterns are obtained. Experimental results demonstrate that the proposed CPG networks are effective to automatically adjust the adaptive gait patterns for the tested quadruped robot under various environment. Furthermore, the target tracking control based on image processing is achieved by combining the generated gait patterns.

著者

板垣 和芳

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.109, no.7, pp.525-528, 1989-07-20 (Released:2008-04-17)

著者

多谷 邦彦 竹田 直人 小林 正 尾崎 吉明 黒木 修隆

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. C (ISSN:03854221)

巻号頁・発行日

vol.137, no.5, pp.742-749, 2017

被引用文献数

4

---

<p>Today we can take many pictures with smart phones or digital cameras, and can edit them easily by ourselves. These pictures are very useful not only for hobby, but for investigation. It is very important to check whether they are doctored or not. This paper proposes an automatic detection method of doctored JPEG images based on two different analyisis: the block noise analysis and the Double-JPEG analysis. Former can find unnatural boundaries of 8×8 DCT blocks while latter can find double saved images by other editing software. Finally SVM classifies images into doctored and undoctored groups based on the above analysis. Experimental results have shown that the detection accuracy of our method achieves 0.90 in terms of F-measure while J. He's method achieves 0.82.</p>

著者

槇尾 榮

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌

巻号頁・発行日

vol.46, no.450, pp.65-77, 1926

---

蓄電池の充電電完了したならば回路を開くが其の場合に於ける電池電壓は如何樣に移動するものであるかを研究した。本論は單に充電の場合に就てだけの過渡現象を取扱つた。<br>ドレザレツク氏がErholung des Accumulatorsとして之を多少論じてゐるが著者の場合は猶ほ一歩すゝめて未發表である諸點にわたつて其の研究をすゝめた。

著者

久保 敏 落合 統

出版者

一般社団法人 電気学会

雑誌

電氣學會雜誌 (ISSN:00202878)

巻号頁・発行日

vol.112, no.11, pp.847-852, 1992-11-20

参考文献数

4

著者

小川 知行 若尾 真治 近藤 圭一郎

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.126, no.12, pp.1690-1698, 2006 (Released:2007-03-01)

参考文献数

8

被引用文献数

2 4

---

In this paper, we study an optimal design for a hybrid power source railway vehicle as an alternative to diesel railway vehicles. The hybrid power source railway vehicle is assumed to be composed of the fuel cell and the electric double layer capacitor. We apply the multiobjective optimization based on the genetic algorithm for the vehicle design, aiming at reduction of both initial cost and energy consumption. The pareto optimal solutions are obtained using the multiobjective optimization.First we develop a simulation model of the hybrid power source railway vehicle and its electric power control methods. Next we derive the pareto optimal solutions as a result of the multiobjective optimization. Finally, we categorize the pareto optimal solutions to some groups, which enables us to elucidate characteristics of the pareto optimal solutions. Consequently, using the multiobjective optimization approach we effectively comprehend the problem characteristics and can obtain the plural valuable solutions.

著者

伴野 啓介 伴野 明

出版者

一般社団法人 電気学会

雑誌

電学論E (ISSN:13418939)

巻号頁・発行日

vol.138, no.8, pp.343-353, 2018-08-01

被引用文献数

2

---

<p>It has been suggested that the <i>Kansei</i> Multi-Media Display (KMMD) is able to emit air flows and scents in addition to conventional audio-visual information through the display. This display is characterized as follows: the display has slits and pits to emit air flows from a position close to projected pictures due to a system where the display is equipped in the back with an air blower and an air flow direction controller. This study aimed to show the psychological effects of two content layouts for cool refreshment, which were produced based on the characteristics of this multi-media display. The possibilities for function and application of the KMMD were examined. An experiment of a virtual fan created as a three-dimensional CG assessed the effects of cool refreshment and the feeling of presence induced by the air flows, which was connected to the swing movement of the fan and emitted from a position close to the image of the fan. Further, an experiment with seasonal images was conducted, providing aromas, which have been reported to affect an individual's sense of cold, when showing video scenes of a cold region. This experiment revealed cross modal physiological effects, such as the decline of the feeling of temperature and the temperature of the skin surface, which were induced subjectively and psychologically by the attribute of this scene.</p>

著者

野村 弘

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.11, pp.711, 1998-11-01 (Released:2008-04-17)

著者

山田 芳靖 土方 啓暢 川原 伸章 藤坂 洋一 中川 誠司

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・マイクロマシン準部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A publication of Sensors and Micromachines Society (ISSN:13418939)

巻号頁・発行日

vol.124, no.8, pp.272-277, 2004-08-01

参考文献数

4

被引用文献数

7 4

---

Voice recognition utilizing bone-conducted voice, which is very robust under noisy environment, has been investigated. The suitability for voice recognition and voice communication of bone-conducted voice recorded at several measurement points on human head was evaluated using LPC cepstrum distance (LCD) and Speech Transmission Index (STI). Experimental results show that forehead and cheek are good as the acquisition points of bone-conducted voice. In order to improve the quality of bone-conducted voice, a novel sensor, which has an inclined frequency response, was fabricated. Using the sensor, acquired bone-conducted voice has a similar frequency response as that of air-conducted voice. Spectral Subtraction is suggested as a method to improve the voice recognition ratio of bone-conducted voice.

著者

河島 信樹

出版者

一般社団法人 電気学会

雑誌

電気学会誌 = The journal of the Institute of Electrical Engineers of Japan (ISSN:13405551)

巻号頁・発行日

vol.129, no.7, pp.422-425, 2009-07-01

参考文献数

13

被引用文献数

2 4

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