著者

小川 理

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.122, no.4, pp.542-547, 2002-04-01 (Released:2008-12-19)

参考文献数

22

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Chromatic dispersion in optical fibers is one of the most important parameters that determine the performance of transmission system. Especially, in the case of recent high-bit-rate and long-haul transmission systems, it is necessary to keep precisely track of the dispersion characteristics of fibers. And the total dispersion of system has to be close to zero by compensating the fiber dispersion, because the dispersion tolerance is very small in such high-bit-rate systems. Firstly in this document, the author explains the basics of chromatic dispersion in fibers and its characteristics of typical fibers. Inthe next, the principle of dispersion compensation techniques and their trends are introduced.

著者

赤崎 正則

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.115, no.7, pp.549-552, 1995-06-20 (Released:2008-12-26)

参考文献数

7

著者

石崎 彰 田中 丈志 高崎 一彦 西方 正司 渡邉 勝之 片桐 淳夫

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.113, no.10, pp.1192-1199, 1993-10-20 (Released:2008-12-19)

参考文献数

4

被引用文献数

14

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It is well known that the direct drive systems not to use the reduction gears with the clearane and backlash are required for the highly precise position control, whose motor must have high torque at very low speed. The authors have developed a new motor for this purpose and named PM vernier motor.In this paper, it is explained at first what is PM vernier motor, the construction and principle, and then the theory able to calculate the torque and how to control its speed are described. It is also shown that the calculated values of torque were agreed well with the experimental results.

著者

宮川 道夫

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.120, no.5, pp.281-284, 2000-05-01 (Released:2008-04-17)

参考文献数

26

被引用文献数

1 1

著者

原 仁 岸 直輝 岩岡 秀人

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.122, no.5, pp.274-279, 2002 (Released:2003-03-28)

参考文献数

11

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We have developed an infrared detector and a micro variable infrared filter for micro-spectrum analyzing devices. Two infrared detectors and the infrared filter were mounted on the identical package. A micro-spectrum analyzing device of 1cm3 volume as the two wavelength NDIR system for combining these elements with the infrared source was able to measure the concentration of carbon dioxide.

著者

田辺 茂 小林 淳男

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.117, no.7, pp.1024-1031, 1997-06-20 (Released:2008-12-19)

参考文献数

10

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We have been developing thyristor valves for high-voltage dc transmission systems for more than 20 years. During this period, the size, power loss and reliability are dramatically improved and one of the technical advancements which support the improvements is to increase the voltage and current rating of thyristors. However when thyristor voltage rating becomes higher than 6kV, increasing the voltage rating does not lead size and power loss reduction of the valve because of turn-off characteristic deteriorations. This paper describes the method which can optimize the thyristor characteristics in such a way that the size and power loss of valves are minimized. Two different approaches for HVDC and back-to-back systems are presented.

著者

清水 教之 西嶋 茂宏

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.116, no.6, pp.334-338, 1996-05-20 (Released:2008-04-17)

参考文献数

13

著者

國井 康晴 マノロックン・ スラデー 橋本 秀紀

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.117, no.5, pp.500-505, 1997-04-20 (Released:2008-12-19)

参考文献数

10

被引用文献数

2

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In this paper we propose a 1DOF master-slave system called HandShake Device (HSD). HSD is composed of 2 systems: one is a master system, which is grasped by an operator, the other is a slave system, which grasps the operator's palm. Two HSDs are respectively placed at a local site and a remote site so that people can physically communicate (by shaking hands) each other through HSDs. HSD applies the virtual model method as an algorithm of tele-operation (tele-handshake). HSD was exhibited in SIGGRAPH'95 with Network Neuro Baby (NNB) which is an Artificial Life acting as a network agent in the computer network. HSD is an interface device which an operator can communicate with NNB physically.

著者

丹羽 利夫 中山 四郎

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.110, no.9, pp.773-776, 1990-09-20 (Released:2008-11-20)

参考文献数

20

著者

吉野 勝美

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.105, no.11, pp.1050-1053, 1985-11-20 (Released:2008-04-17)

参考文献数

14

著者

小坂 満隆

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.118, no.2, pp.264-270, 1998-02-01 (Released:2008-12-19)

参考文献数

6

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Effective utilization of information has become more important in information systems of inter/intranet era, such as real time decision support systems or mass-customization systems. In this paper, a concept of information potential is proposed for considering the effectiveness of information utilization. This concept is analogous to the potential field theory, where the information potential shows the degree of necessity of information in the decision and the information power shows the effect of information in the decision. Based on the proposed concept, a design method of decision support systems is proposed, where the intelligent agent technology is used for evaluating information potential. This method is applied to a real time decision support system, especially a securities dealing decision support system to confirm its effectiveness.

著者

林部 林平 渡辺 誠一 伊藤 秀明

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.122, no.1, pp.23-28, 2002 (Released:2003-03-28)

参考文献数

9

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The authors produced a driving circuit for resistive humidity sensor using the timer IC and applied it to the thermo-hygrometer. This paper describes as follows: (1) a simple driving circuit using the timer IC was produced and the theoretical equation of its oscillating frequency was derived. (2) relative humidity as low as 10 %RH could be measured using the driving circuit for resistive humidity sensor. (3) the measurement error of the thermo-hygrometer using the driving circuit was achieved within ± 3 %RH above 30 %RH.

著者

諸住 哲 西谷 健一 長谷川 淳 藤原 一

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.105, no.4, pp.355-362, 1985

著者

白井 健二 天野 佳則 井上 和夫

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.118, no.10, pp.1485-1492, 1998-10-01 (Released:2009-10-02)

参考文献数

9

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The purpose of this paper is to theoretically identify that there exist stationary distributions in the system with transaction lost. In order to examine this type of system, we formulate and analyze the input/output process as the counting process based on point process. Accordingly, we make clear that this stationary distributions are the geometrical distributions as well. We, also analyze the average transit time in the stationary. We presented the simulation results in order to evaluate this system.

著者

鈴木 誠一 大沼 扶久子 矢波 智佳子 村山 智子 穐吉 真

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.120, no.8-9, pp.1092-1097, 2000-08-01 (Released:2008-12-19)

参考文献数

7

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Pressure ulcer is a symptom frequently found in the patients incapable of moving for themselves in paraplegia or defects in central nervous system. It is caused mainly from chronic pressurization of skin tissue, but many other factors are also reported to promote the pressure ulcer. Shear force is among them. Biomechanical researches suggest mechanochemical reaction of cell that can disturb to repair the wound tissue, however, few studies were made about the relationship between the shear force and the pressure ulcer, because of the difficulty in measuring the shear force without affecting the skin condition itself. To measure the shear force without such interference, we have developed a planar shear force gauge, and measured the skin shear force for its preliminary evaluation. The device was found to be useful for the measurement of the local shear force and the skin deformation. However, further investigation on the material for the torsion frame and the fabrication accuracy is necessary.

著者

大竹 秀幸 猿倉 信彦

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.120, no.1, pp.27-30, 2000-01-01 (Released:2008-04-17)

参考文献数

16

著者

藤原 修三

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.106, no.2, pp.145-149, 1986-02-20 (Released:2008-04-17)

参考文献数

35

著者

岩田 聖也 大山 航 若林 哲史 木村 文隆

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.12, pp.1668-1676, 2016-12-01 (Released:2016-12-01)

参考文献数

18

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The authors have conducted studies on Arabic telop recognition to develop a system for video retrieval by keyword to index and edit Arabic broadcast programs received daily and stored in a big database. This paper describes a dedicated OCR for recognizing low resolution telop in video images. A telop recognition system consisting of text line extraction, word segmentation and segmentation-recognition of words is developed and the performance was experimentally evaluated using datasets of frame images extracted from AlJazeera broadcasting programs. Character recognition of moving telop is difficult due to combing noise caused by the interlacing of scan-lines. A technique to detect and eliminate the combing noise to correctly recognize the moving telop is proposed. This paper also proposes a technique based on insertion operation with minimum edit distance between successive two telops to connect them. The method to connect the moving telops is necessary for automatic language translation. The proposed method using edit distance for bi-gram sequence of telops (Method-B) is shown to be robust to recognition error of characters and successfully connect the telops.

著者

寺谷 達夫

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.121, no.4, pp.433-434, 2001-04-01 (Released:2008-12-19)

被引用文献数

2 4

著者

白井 五郎 沓掛 政志 竹内 茂

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.113, no.12, pp.1371-1380, 1993-12-20 (Released:2008-12-19)

参考文献数

21

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This paper describes a unified automatic generation control (AGC) scheme coordinating EDC (Economical Load Dispatching Control) and LFC (Load Frequency Control). So far, in absorption of the load fluctuations occurring on power systems, both of EDC and LFC systems have been considered separately each other. By coordinating both control systems, undesirable system behaviours are avoided. The responses of frequency deviation, turbine power fluctuation and tie-line power flow deviation are smoothed using the proposed AGC scheme.The background theory is based on servo-type optimal control theory. The structure of the proposed control method is a decentralized type. So, the implementation in multi-area power systems is easy.The effectiveness of the proposed unified AGC is illustrate_??_ by an example, and the simulation results on three-area power systems show that the method is encouraging. In this paper, some of the problems associated with the application of this method to the multi-area AGC are discussed.