著者
榎本 祐嗣
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.115, no.9, pp.582-585, 1995-08-20 (Released:2008-04-17)
参考文献数
10
著者
鷹野 敏明 山口 潤 阿部 英二 二葉 健一 横手 慎一 河村 洋平 高村 民雄 熊谷 博 大野 裕一 中西 裕治 中島 映至
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌A(基礎・材料・共通部門誌) (ISSN:03854205)
巻号頁・発行日
vol.128, no.4, pp.257-262, 2008-04-01 (Released:2008-04-01)
参考文献数
7
被引用文献数
4 6

We developed a cloud profiling radar, named FALCON-I, transmitting frequency-modulated continuous wave (FM-CW) at 95 GHz for high sensitivity and high spatial resolution ground-based observations. Millimeter wave at 95 GHz is used to realize high sensitivity to small cloud particles. An FM-CW type radar realizes similar sensitivity with much smaller output power to a pulse type radar. Two 1m-diameter parabolic antennas separated by 1.4m each other are used for transmitting and receiving the wave. The direction of the antennas is fixed at the zenith at this moment. The radar can observe clouds up to 20 km in height with a resolution of 9 m. Beam size of the antenna is as small as 0.2 degree of arc, which corresponds to 15 m at the range of 5 km. Observation results showed that the sensitivity of -34 dBZ is realized at 5 km in range, and good spatial resolutions.
著者
秋山 賢成
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.138, no.11, pp.758-761, 2018-11-01 (Released:2018-11-01)
参考文献数
1

1.はじめに昨今のコンピュータ・スマートフォン・テレビ向けなどゲームの進化の背景には,ハードウェアのスペック向上やソフトウェアの使い勝手向上などの,テクノロジーの急速な進化と普及が理由として挙げられる。ハードウェアは,例えば1年前の能力とはほぼ比較がで
著者
椿 崇裕 小林 聖人 上田 好寛 元井 直樹
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.144, no.1, pp.28-34, 2024-01-01 (Released:2024-01-01)
参考文献数
25

For operability improvement, this paper proposes a frequency modification method using fast Fourier transform (FFT) in a bilateral control. A bilateral control is one of the remote control methods with tactile sensation. The bilateral control system consists of the leader and follower systems. By using FFT, the position response and estimated force in the leader and follower systems are converted from the time domain to the frequency domain. In the frequency domain, frequency modification is conducted. After the frequency modification, the frequency domain data is reconverted to the time domain by using inverse FFT. Therefore, the proposed method enables frequency modification that is easy for the operator to manipuate in the bilateral control. For the confirmation of the validity of the proposed method, the experiments that imitate drilling tasks were conducted.
著者
近藤 稔 川村 淳也 寺内 伸雄
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.2, pp.168-173, 2006 (Released:2006-05-01)
参考文献数
10
被引用文献数
3 10

Performance tests are carried out to demonstrate the superiority of a permanent magnet synchronous motor to an induction motor as a traction motor for high-speed train. A prototype motor was manufactured by replacing the rotor of a conventional induction motor. The test results show that the permanent magnet motor is lighter, efficient and more silent than the induction motor because of the different rotor structure.
著者
山下 和彦 野本 洋平 梅沢 淳 宮川 晴妃 川澄 正史 小山 裕徳 斎藤 正男
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.2057-2063, 2004 (Released:2005-01-01)
参考文献数
25
被引用文献数
2 2

There is the increasing concern of the society to prevent the tumbling of the aged. The study of the static, as well as dynamic aspects, such as the muscular strength of the lower-limb and the postural stability, should be developed, especially from the viewpoint of the aged. This paper focuses on the external observation of the foot and toenail, as being correlated to the physical functions of the lower-limb against tumbling. The lower-limb functions are evaluated in terms of the 10 m walking time, the toe-gap force and single-foot standing period. The correlation to the personal tumbling experiences is also examined. It is seen that the groups, which exhibit external abnormalities in the foot and the toenail, generally decline in the muscular strength and postural stability. They also have more frequent tumbling experiences and express in their concern of the danger of tumbling. It seems that those shapes abnormalities can indicate, to some extent, the tumbling danger of the aged.
著者
蓮見 孝雄
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.53, no.535, pp.123-127, 1933-02-10 (Released:2008-11-20)
参考文献数
4

捲線型三相誘導電動機の回韓子一相に,任意のインピーダンスを挿入したる場合の特性の理論的研究をなして居る。尚二三の數字例及實驗の結果をも示してある。本文の内容は次の諸項より成る。