著者

冨田 泰志 小林 朗 鶴貝 満男

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.133, no.8, pp.1607-1615, 2013-08-01 (Released:2013-08-01)

参考文献数

25

被引用文献数

3

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To lower the burden on the global environment, renewable energy resources are increasingly being integrated to power systems, in particular, a great deal of photovoltaics (PVs) in Japan are expected to be installed on the roof-top of residential houses. However, this will make the supply-demand balance control and the voltage control of a power system difficult. A measure to reduce this impact is consuming excess power in local area where PVs are located.We have developed a control algorithm for adjusting the operating pattern of multiple heat pump water heaters as a group to maximize the consumption of excess power of PVs in local area. The problem was formulated as a combinatorial optimization problem, and the tabu search method was applied as a meta-heuristics solution. The result of a case study for group control of six consumers that used the same low-voltage transformer showed an operating pattern that has the following features. First, the consumption of excess PV power was maximized. Second, the consumption of commercial electric power was minimized. We also compared the result by controlling a group of six consumers with the result by controlling of six consumers that had been controlled individually, and showed that the consumption of PV excess power was increased by 46% at the same level of commercial electric power consumption.

著者

残間 忠直 福田 純一 道木 慎二 石田 宗秋 大熊 繁 松本 敬史 西森 英二

出版者

The Institute of Electrical Engineers of Japan

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.127, no.2, pp.264-273, 2007-02-01

参考文献数

14

被引用文献数

1 2

---

This paper concerns a DC-DC converter control. In DC-DC converters, there exist both continuous components such as inductance, conductance and resistance and discrete ones, IGBT and MOSFET as semiconductor switching elements. Such a system can be regarded as a hybrid dynamical system. Thus, this paper presents a dc-dc control technique based on the model predictive control. Specifically, a case in which the load of the dc-dc converter changes from active to sleep is considered. In the case, a control method which makes the output voltage follow to the reference quickly in transition, and the switching frequency be constant in steady state. In addition, in applying the model predictive control to power electronics circuits, the switching characteristic of the device and the restriction condition for protection are also considered. The effectiveness of the proposed method is illustrated by comparing a conventional method through some simulation results.

著者

奥村 次徳

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.1, pp.1-1, 2002-01-01 (Released:2008-12-19)

著者

阿部 清彦 大和田 厚祐 大井 尚一 大山 実

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.127, no.7, pp.1036-1042, 2007-07-01 (Released:2007-09-01)

参考文献数

17

被引用文献数

1 2

---

We have developed an eye-gaze input system for people with severe physical disabilities, such as amyotrophic lateral sclerosis (ALS) patients. This system utilizes a personal computer and a home video camera to detect eye-gaze under natural light. The system detects both vertical and horizontal eye-gaze by simple image analysis, and does not require special image processing units or sensors. We also developed the platform for eye-gaze input based on our system.In this paper, we propose a new web browsing system for physically disabled computer users as an application of the platform for eye-gaze input. The proposed web browsing system uses a method of direct indicator selection. The method categorizes indicators by their function. These indicators are hierarchized relations; users can select the felicitous function by switching indicators group. This system also analyzes the location of selectable object on web page, such as hyperlink, radio button, edit box, etc. This system stores the locations of these objects, in other words, the mouse cursor skips to the object of candidate input. Therefore it enables web browsing at a faster pace.

著者

小幡 孝太郎 杉岡 幸次 甲野 竜哉 高井 裕司 豊田 浩一 緑川 克美

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.2, pp.241-245, 2003-02-01

参考文献数

13

---

Dynamics of ablation of fused silica by multiwavelength excitation process using F₂ and KrF excimer laser has been investigated by energy analyzed mass spectrometry of ablated species. The number of generated Si⁺ ion by multiwavelength excitation process corresponds to that by single-F₂ laser ablation and to approximately 2.1 times higher than that by single-KrF excimer laser ablation. In addition, kinetic energy distribution of Si⁺ ablated by multiwavelength excitation process shows almost same as that by single-F₂ laser ablation. We regard that absorption of KrF excimer laser by excited state generated by F₂ laser (excited-state absorption: ESA) causes effective photoionization, resulting in enhancement of Si⁺ with higher kinetic energy and then in high-quality ablation.

著者

河口 信夫 坂部 俊樹 稲垣 康善

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.116, no.1, pp.103-110, 1995-12-20 (Released:2008-12-19)

参考文献数

23

---

Term Rewriting System (TRS) is one of the simplest computation models for functional programming languages. It can also be used to model term manipulation required in program verification and transformation. In such applications, an environment for term rewriting with user friendly graphical interface is strongly required for analyzing structure of terms and rewriting processes. Most TRS interpreters developed so far are text, based ones, and hence they do not provide sufficient supports for analyzing structure of terms. We have proposed a new idea for a term visualization based on Graphical User Interfaces (GUI) [11] [12]. This paper shows how to realize the idea with the functional programming language Standard ML (SML). We illustrate the implementation can be easily modified and extended since the rewriting part and GUI part of the program are clearly separated owing to the module system of SML.

著者

木村 優志 澤田 心大 入部 百合絵 桂田 浩一 新田 恒雄

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.132, no.9, pp.1473-1480, 2012-09-01 (Released:2012-09-01)

参考文献数

21

---

In this paper, we propose a task estimation method based on multiple subspaces extracted from multi-modal information of image objects in visual scenes and spoken words in dialog appeared in the same task. The multiple subspaces are obtained by using latent semantic analysis (LSA). In the proposed method, a task vector composed of spoken words and the frequencies of image-object appearances are extracted first, and then similarities among the input task vector and reference sub-spaces of different tasks are compared. Experiments are conducted on the identification of game tasks. Experimental results show that the proposed method with multi-modal information outperforms the method in which only single modality of image or spoken dialog is applied. Moreover, the proposed method achieved accurate performance even if less spoken dialog is applied.

著者

滑川 徹 細田 康彦

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.132, no.9, pp.1446-1453, 2012-09-01 (Released:2012-09-01)

参考文献数

29

被引用文献数

1 2

---

This paper deals with H∞ filter-based short-term electric load prediction considering characteristics of load curve. We propose a predictive method to forecast a future electric load demand for 36 hours from 0 PM, and then evaluate the peak and bottom of load curves in the next day. We propose a load model, estimates unknown parameters of model via H∞ filter using the separated data from holiday and weekday, a same pattern of the previous data have been chosen and assigned to parameters for the model. The simulation results show the effectiveness of the proposed prediction methodology.

著者

山口 智

出版者

The Institute of Electrical Engineers of Japan

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.128, no.11, pp.1696-1703, 2008-11-01

被引用文献数

6 8

---

Differential Evolution(DE) is one of the evolutionary algorithms, and has shown excellent ability for solving global optimization problems over continuous spaces. DE has a few control parameters that have to be set by users. The ability of DE is depending on these control parameters, and, in many cases, trial-and-error process are required for finding suitable parameters. This paper proposes a method for tuning the DE control parameters automatically. The proposed method tunes control parameters within DE search process. By using this method, trial-and-error processes for finding appropriate control parameters are not required. To evaluate the performance, the proposed method was applied to 9 benchmark function optimization problems. The results indicate that the proposed method shows 100% feasibility to solving the optimization problems without outstanding increase of generations required for finding the optimum solutions.

著者

平塚 三好

出版者

The Institute of Electrical Engineers of Japan

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.131, no.2, pp.278-282, 2011-02-01

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Assuming that patent trolls would come up in the field of software and the like in Japan in the future, we have proposed countermeasures to apply compulsory license against their exercise of patent right. Specifically, in order to avoid injunctive relief of the patent trolls, we have proposed that the enforcement regulation for Japanese Patent Act Article 83 is overhauled in attempt to broadly construe the provision of "the grant of non-exclusive license where invention is not worked" as "the grant of non-exclusive license where invention will not be worked in the future". Also, we have compared such countermeasures with other countermeasures to apply the principle of abuse of rights to the injunctive relief.

著者

宮崎 保光

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.1, pp.99-104, 1997-12-20 (Released:2008-12-19)

参考文献数

12

被引用文献数

1 2

---

High bit rate and high speed mobile radio communications using microwaves and millimeter waves are very attractive for wireless mega and giga bits LAN and video transmissions. Radio interferences due to multi-propagation paths and multiple scattering by street buildings and natural structures of hills and trees are very important problems for high bit rate mobile radio communications. Real time high speed signal processing for delayed fading noises may be required. Optical signal processing using optical and radio interactions are most useful method to accomplish real time high speed signal processing. Fundamental properties and applications of optical signal processors using optical active waveguide devices are shown for high bit-rate mobile communications.

著者

森 春夫 萩村 和夫 今井 哲二

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. C (ISSN:03854221)

巻号頁・発行日

vol.105, no.1, pp.1-8, 1985-01-20 (Released:2008-12-19)

参考文献数

10

著者

田中 隆治 吉岡 理文

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.131, no.11, pp.1895-1900, 2011-11-01 (Released:2011-11-01)

参考文献数

7

---

In recent years, Augmented Reality (AR) becomes the focus of attention as a technology for obtaining some information. Most AR systems have used some markers to display any information. However, since markerless AR systems can be used intuitively, they are researched actively.In this paper, we study about the AR system based on the hand recognition as a markerless system. The reason why we used a hand is that we don't need to prepare or carry on any tool, and can easy to watch any information on a hand. Taehee Lee et al. introduced HandyAR which employ the hand recognition. In this method, there are some problems. At first, when the method learns skin model, it needs many learning data. This is because it uses RGB color model. Secondly, it is difficult to get hand because hand images which are extracted by the skin model have noise. Thirdly, the method uses finger positions to estimate the hand coordinate. Therefore it is sensitive to finger state. We improved HandyAR to solve these problems. Experimental result showed that our method had higher performance than conventional methods.

著者

荒木 望 帆足 勇希 小西 康夫 満渕 邦彦 石垣 博行

出版者

The Institute of Electrical Engineers of Japan

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.131, no.4, pp.736-741, 2011-04-01

被引用文献数

1

---

This paper proposed an active finger recognition method using Bayesian filter in order to control a myoelectric hand. We have previously proposed a finger joint angle estimation method based on measured surface electromyography (EMG) signals and a linear model. However, when we estimate 2 or more finger angles by this estimation method, the estimation angle of the inactive finger is not accurate. This is caused by interference of surface EMG signal. To solve this interference problem, we proposed active finger recognition method from the amplitude spectrum of surface EMG signal using Bayesian filter. To confirm the effectiveness of this recognition method, we developed a myoelectric hand simulator that implements proposed recognition algorithm and carried out real-time recognition experiment.

著者

玉木 徹 山村 毅 大西 昇

出版者

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.120, no.12, pp.1801-1808, 2000-12-01

被引用文献数

1

著者

樋口 寛晃 旭 健作 佐川 雄二 杉江 昇

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.12, pp.2439-2445, 2004 (Released:2005-03-01)

参考文献数

18

被引用文献数

1 2

---

We propose a method for separating speeches using two spectrograms. First, two spectrograms are generated from voices recorded with a pair of microphones. The onsets and the offsets of the frequency components are extracted as the features using image processing techniques. Then the correspondences of the features between the spectrograms are determined and the intermicrophone time differences are calculated. Each of frequency components with the common onset/offset occurrences and time difference are grouped together as originating one of the speech signals. A set of band-pass filters are generated corresponding to each group of frequency components. Finally, each of the separated speech signals is extracted by applying the set of band-pass filters to the voice signal recorded by a microphone. Experiments were conducted with the mixture of a male speech sound and a female speech sound consisting of Japanese vowel and contain consonant. The evaluation results demonstrated that the separation was done reasonably well with the proposed method.

著者

加藤 省三 荒木 睦大 小越 康宏 谷口 秀次 森 幹男

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.130, no.6, pp.1054-1060, 2010-06-01 (Released:2010-06-01)

参考文献数

20

被引用文献数

1

---

The processing of kana-to-kanji conversion can be classified into two categories of processing: The first is the processing to detect the boundaries of words in non-segmented kana strings, and the second is the processing to select the candidate of kanji-kana words. Also, the methods of kana-to-kanji conversion can be mainly classified into two types from the point of view of the two processing described above: One is to conduct simultaneously these two processing (called Method-A), and the other is to conduct sequentially them (called Method-B), namely, to detect the boundaries of kana words by using Markov chain model of kana words, and then to convert kana words to kanji-kana words and to select the maximum likely candidates by using Markov chain model of kanji-kana words. This paper evaluates two types of kana-to-kanji conversion method (Method-A and Method-B) by using 2nd-order Markov chain model of words. Through the experiments by using statistical data of daily Japanese newspaper, Method-A and Method-B are evaluated by the criteria of the accuracy rate of conversion, the conversion processing time and the memory capacity. From the results of the experiments, it is concluded that the Method-B is superior to Method-A in the conversion processing time and the memory capacity and is effective in kana-to-kanji conversion of bunsetsu.

著者

雨宮 正樹 今江 理人 藤井 靖久 鈴山 智也 内藤 孝 浦川 順治 海老原 清一 照沼 信浩

出版者

The Institute of Electrical Engineers of Japan

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.130, no.4, pp.644-650, 2010-04-01

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A precise frequency dissemination system using optical fiber is studied. The purpose of the system is to transmit frequency standard with little deterioration to distant many users. It is composed of a phase compensation transmitter, bidirectional optical amplifiers, optical amplified distributor, and receiver. The system target is to achieve a stable transmission of hydrogen maser class signals. For short term stability, it is shown the required optical received power to realize the Allan deviation of 1×10^-13 (averaging time of 1 s). For long term stability, a new compensation method using third wavelength transmission is effective to suppress phase fluctuation induced by fiber temperature change. Experimental result shows stability of 8×10^-17 at 10⁵ s in a fiber link of 160 km in total with one bidirectional optical amplifier.

著者

堂脇 清志 森 俊介 福島 千尋 浅井 貴康

出版者

The Institute of Electrical Engineers of Japan

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.10, pp.1670-1679, 2003-10-01

被引用文献数

2 1

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This paper describes on a comprehensive economic analysis concerning biomass gasification systems. In Japan, promoting biomass energy systems in domestic area comes to be expected recently. However, there are some problems in achieving this project. The costs for plant building are very expensive comparing with conventional ones. Accordingly, the unit costs of electricity increase up to as high as other environmental energy systems.<br>In this paper, biomass energy systems using woody biomass are proposed from the viewpoints of successful environmental business. The biomass integrated gasification combined cycle (BIGCC) plant by Independent Power Producer and biomass gasification co-generation (BGCGS) plant in the sawmill or the asphalt-concrete production factory will have opportunities to be implemented in the near future. Our analysis concludes that the systems proposed in this paper provide the following outcomes with subsidies: (1) the generating cost in BIGCC becomes from 15.1 to 36.6 yen/kWh, (2) the generating cost in BGCGS becomes from 2.6 to 32.2 yen/kWh, (3) the cost reduction of products in BGCGS in asphalt factory comes to about 60 million yen per year.

著者

七夕 高也 清水 久代 篠村 知子 高野 誠 宮村 中村 浩子 斎藤 隆文

出版者

The Institute of Electrical Engineers of Japan

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.128, no.6, pp.962-969, 2008-06-01

被引用文献数

3 1

---

We developed an imaging system and image analysis software for phenotype analysis of rice seedlings growth. The developed imaging system could collect rice seedlings growth images in test tubes every 10 minutes. The image analysis software could detect leaf tip points and collect measurement of leaf height. Using this system, we could obtain detailed measurement and analysis phenotype of rice seedlings growth depends on time parameters, germination timing and leaf elongation timing.