著者

宇都宮 敏男

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.6, pp.511-512, 1986-06-20 (Released:2008-04-17)

著者

下田 篤 小杉 秀則 狩野 隆文 薦田 憲久

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.128, no.4, pp.562-568, 2008-04-01 (Released:2008-04-01)

参考文献数

10

被引用文献数

1 2

---

A method of forecasting shipping number of parts is proposed for build-to-order products using quote information in pre-sales as an advance indicator. As the target shipping number of parts changes irregularity in a short cycle, it is difficult to forecast with conventional methods. In case of build-to-order product, quote information is useful for forecasting multiplying by order probability. But the problem is how to identify the order probability includes unobservable noise. The method assumes the noise as normal random number and corrects it with Kalman filter. The shipping number is calculated using identified order probability and previous quoted information. The method was evaluated using 78 types of parts of an information equipment product. Experimental result demonstrates that shipping number of parts whose average rate of change are less than 0.4 can be estimated with 28.2% of mean absolute percent error, making the method available for forecasting the target shipping number.

著者

前田 康弘 宮原 裕二

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.131, no.4, pp.166-166, 2011-04-01 (Released:2011-04-01)

著者

島谷 直規 保田 俊行 大倉 和博 松村 嘉之

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.134, no.9, pp.1355-1364, 2014 (Released:2014-09-01)

参考文献数

25

---

Evolutionary swarm robotics (ESR) is an artificial evolution approach to generating meaningful swarm behavior in multi-robot systems which typically consist of many homogenous autonomous robots in which the same robot controllers designed with evolving artificial neural networks are employed. Historically speaking, this approach has been thought to be a promising approach for swarm robotics systems (SRS), because the swarm behavior is an emergent phenomenon caused by many local interactions among autonomous robots and it is very hard to give a program to each robot for appropriate swarm behavior in advance. However, its realization is considered to be impractical even for a simulated SRS because the artificial evolution requires a very large computational cost. In this paper, in order to overcome this computational cost problem, a novel implementation method, i.e., the parallel problem solving using graphics processing units (GPUs) and OpenMP on a multi-core CPU, is introduced. The efficiency of the proposed method is demonstrated with the food-foraging problem with an evolving SRS.

著者

塙 智仁 鄧 明聡

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.134, no.9, pp.1214-1220, 2014 (Released:2014-09-01)

参考文献数

12

被引用文献数

1

---

In this paper, a nonlinear control system considering the uncertainties of the backlash of nonlinear plants is proposed. The uncertainties of the backlash of nonlinear plants are included in thresholds of backlash. Firstly, a backlash model with uncertain thresholds is proposed. Secondly, a robust nonlinear control system is designed. Finally, the effectiveness of the proposed system is confirmed by simulations.

著者

中村 幸紀 野口 裕喜 涌井 伸二

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.134, no.9, pp.1182-1190, 2014 (Released:2014-09-01)

参考文献数

23

被引用文献数

1

---

This paper considers the compensation of flow disturbance, which is the variation of air pressure supplied by the air compressor of pneumatic active anti-vibration apparatuses (AVAs). Since the air pressure varies periodically, repetitive control is utilized for the suppression of the vibration induced by the flow disturbance. As the constant gain of the repetitive controller increases, disturbance compensation is improved further. On the other hand, when the gain becomes large, transmissibility increases in the frequency region including the mechanical resonance of AVAs. It leads to the performance degradation of the vibration isolation. In order to overcome the trade-off between the disturbance compensation and the transmissibility, a notch filter is employed instead of the constant gain in the repetitive controller. The center frequency of the filter is set to the frequency region including the mechanical resonance of AVAs so as to avoid the increase of the transmissibility. By using the proposed method, the performance of disturbance compensation can be improved without increasing the transmissibility. Furthermore, effects of parameters for the notch filter are investigated. Experimental and simulation results show that the performance of flow disturbance suppression and the transmissibility of the AVA are almost same regardless of parameters in the notch filter.

著者

高木 太郎 水本 郁朗

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.134, no.9, pp.1175-1181, 2014 (Released:2014-09-01)

参考文献数

12

被引用文献数

2 2

---

This paper deals with a design problem of an adaptive PID control with an adaptive Neural Network (NN) feedforward control input for discrete-time systems with a parallel feedforward compensator (PFC). The stability of the designed adaptive PID control system is analyzed provided that the augmented controlled system with a PFC is ASPR. The effectiveness of the adaptive PID control method will be confirmed through numerical simulations for a discrete-time system.

著者

濱上 知樹 澤田 和人

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.134, no.9, pp.1282-1286, 2014 (Released:2014-09-01)

参考文献数

13

---

Study of heritage database and historical archive become an active area in multidisciplinary fields. The huge and high dimensional content is a sort of big data consisting of various kinds of information elements, and has valuable knowledge and the wisdom of mankind. This study focuses on Kosode Byobu collection which is antique fine art in Edo era. By analyzing high-resolution digital images of them and extracting knowledge structure by machine learning, we apply it for intelligent display and research of the art. This article introduces the background of the project and shows fundamental approach for tackling to retrieving intelligent structure and developing effective display technique.

著者

秦 誠一

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.131, no.7, pp.NL7_2-NL7_2, 2011-07-01 (Released:2011-07-01)

著者

高橋 宏知 中尾 政之 加我 君孝 Thierry Hervé

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.9, pp.1469-1480, 2002-09-01 (Released:2008-12-19)

参考文献数

40

---

We employ the independent component analysis (ICA) for multiple-site grand-averaged auditory-evoked-potentials and show its feasibility to interpret the data physiologically. We first simulate near field potential at auditory cortex to examine how ensemble firing activities and synaptic activities generate the potential: both arise biphasic potential and firing activities are followed by synaptic activities by a few millisecond. We then implement ICA to our multiple-site auditory-evoked middle latency responses (MLR). The simulation and previous reports suggest that ICA successfully extract from the data three significant components, that are cortical firing activities, cortical synaptic activities, and far activities. ICA also shows how these compo-nents contribute to MLR waveforms and suggests how typical MLRs are generated: MLR only with Na-Pa-Nb appears when both synaptic activities and firing activities are sufficiently large: the No-Po-Na-Pa-Nh complex appears when both are not so large; and the NA-PA-NB-PB-NC complex appears when both are sufficiently small.

著者

安田 倫己 山田 明宏 田中 武

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 = The transactions of the Institute of Electrical Engineers of Japan. A, A publication of Fundamentals and Materials Society (ISSN:03854205)

巻号頁・発行日

vol.132, no.12, pp.1112-1117, 2012-12-01

参考文献数

5

被引用文献数

1

---

LSI systems are used at all places in modern society. A number of different technologies are used to produce LSI systems, therefore it becomes difficult to understand these systems. The education which was consistent from an integrated circuit (IC) design to a printed circuit board mounting was mainly attained at universities and graduate schools. In this study, the training for understanding IC stacked structure and layout design was conducted on the education of a senior high school. Exclusive CAD software for LSI design, α-SX was used to IC layout design. Each Student had designed an inverter and a NAND circuit. They had designed a full adder circuit in a group. Then with public development equipment, IC chips were actually manufactured along with this layout design. Bare chips were observed with scanning electron microscope (SEM). SEM and Energy Dispersive x-ray Spectroscopy (EDX) analysis were effective to deeply understand between stacked structures and material characteristics of an IC. This project was taken as a cooperation education of a high school and a university. We showed the possibility to take in an integrated circuit structure education to one of the training subjects in a senior high school.

著者

高瀬 國克

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.5, pp.607-607, 2000-05-01 (Released:2008-12-19)

著者

伊庭 健二 川崎 龍子 熊野 長次郎

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.114, no.2, pp.252-258, 1994-02-20 (Released:2008-12-19)

参考文献数

5

---

This paper presents a method for drawing power system networks using fractal technique. It is quite common to represent power systems as visual network graph. The drawing of such graph, however, was performed manually by human-hand. Automatic drawing makes possible to represent power system flexibly. The mathematical problem seems to be similar to “How to draw planar graph”. However, unlike to the planar graph problem which treats eassentially non-separable, power systems contain a few loops. Fractal graph is utilized in this paper. Our problem is defined as follows: (1) All vertex must be on the grid. All branches must be composed of horizontal or vertical line segments. The vertex that has more than 5 degree can be divided into sub-vertices. (2) Geometrical relationship between two vertices must be preserved as long as possible (In this paper, “Geometrical” means “Directional”). (3) Branches should not cross each other as long as possible. The method is applied to some practical power system networks. Although the method has some week points for grid systems, the test results show the feasibility of the proposed method.

著者

石川 幸一郎 谷口 治人 鈴木 宏和 太田 豊 水野 陽二郎

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.134, no.7, pp.568-578, 2014 (Released:2014-07-01)

参考文献数

29

被引用文献数

6

---

Because of global warming, the attention to the photovoltaic generation has increased, and a lot of photovoltaic generations will be installed in the power system. In Japan, most photovoltaic generations will be connected to the distribution system. This will make the power flow in the power system changed. That is to say that the forward power flow (flow from higher voltage system to lower voltage system) reduces, or, moreover, that the reverse power flow occurs. Because of the change in power flow, the voltage characteristics will be also changed. Consequently, it is expected that the penetration of photovoltaic generation has some impacts on voltage stability. In previous study, the voltage characteristics in simple power system model which consists of one infinite bus, one load, and one photovoltaic generation is made clear. It is indicated from the results that there is not only forward power flow limit but also reverse power flow limit (left nose in PV curve), and that, when the output power from photovoltaic generation is very large, left nose sometimes has some impacts on voltage stability. In this paper, the voltage stability in the simple power system model considering the dynamics of an induction motor is discussed.

著者

石川 幸一郎 谷口 治人 鈴木 宏和 太田 豊 水野 陽二郎

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.134, no.1, pp.2-8, 2014-01-01 (Released:2014-01-01)

参考文献数

14

被引用文献数

2 9

---

Because of global warming, the attention to the photovoltaic generation has increased, and a lot of photovoltaic generations will be installed to the power system in future. In Japan, most photovoltaic generations will be connected to the distribution system. This will make the power flow in the power system changed. That is to say that the forward power flow (flow from higher voltage system to lower voltage system) reduces, or, moreover, that the reverse power flow occurs. Because of the change in power flow, the voltage characteristics will be also changed. Consequently, it is expected that the penetration of photovoltaic generation has some impacts on voltage stability. In this paper, simple power system model which consists of one infinite bus, one load, and one photovoltaic generation is considered, and the fundamental voltage characteristics are discussed by PV curves and phasor diagram. The voltage characteristics considering the current limit by PCS (Power Conditioning System) in the photovoltaic generation are also discussed.

著者

吉川 茂樹 北 裕幸 田中 英一 長谷川 淳

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.12, pp.1137-1145, 2005 (Released:2006-03-01)

参考文献数

23

被引用文献数

3 2 4

---

The authors have proposed the Flexible, Reliable and Intelligent ENergy Delivery System (FRIENDS) as a concept of future electric power systems. The concept of FRIENDS takes into account the deregulation of the electric power industry and progress of technologies such as power electronics, distributed generators (DG), distributed energy storage systems (ESS), information and communication. One of the most important characteristics of FRIENDS is that new facilities called Quality Control Centers (QCC) are installed between distribution systems and electric consumers.This paper presents a methodology for DSM based on a real-time pricing system through the information and communication network in FRIENDS. The economic use of DG and ESS in QCC is also considered in the proposed DSM. The sigmoid logistic function is used for modeling the real-time pricing system and a couple of parameters in the function are optimized by the Genetic Algorithm so that the profit of QCC is maximized. The effectiveness of the proposed DSM is ascertained by evaluating the profit or the load factor of QCC through simulations using model systems.

著者

川畑 理 大沼 均

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 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society (ISSN:09136339)

巻号頁・発行日

vol.129, no.5, pp.470-475, 2009-05-01

---

In this paper, we present a design method for reducing local losses in a Gate Turn-Off Thyristor (GTO) at turn-on and protecting GTOs, particularly those of the flat-package type used in the high-frequency switching from overheating failure. This method utilizes the measurement of cathode-current spread obtained by infrared measurement. The performance of this was verified observing the gate-current at turn-on in a GTO used in the LC resonant commutation circuit for a power supply rated 10kHz, 1.0MW.

著者

藤村 喜久郎 徳高 平蔵 石川 眞澄

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.119, no.7, pp.875-882, 1999-07-01 (Released:2008-12-19)

参考文献数

12

被引用文献数

1

---

Angeniol et al. applied Kohonen's Self-Organizing Maps (SOM) to solve the traveling salesman problem (TSP) and showed to have a practically enough solution obtained for a short time in comparison to a method depending on a conventional neural network in 1988. We confirmed already that a calculation time is shortened further about TSP of 500 cities, by introducing a momentum effect to the renewal coefficient of original method (Angeniol's, method; SOM-TSP). Here, we report that we evaluated a performance of our improved method about TSP of more large 1000, 2000, 10000 cities.

著者

古田 勝久

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.134, no.6, pp.327-327, 2014 (Released:2014-06-01)

---

本記事に「抄録」はありません。

著者

小野 仁志 趙 昌錫 南谷 晴之

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.115, no.12, pp.1568-1569, 1995-11-20 (Released:2008-12-19)

参考文献数

2