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.138, no.8, pp.NL8_1_4-NL8_1_6, 2018-08-01 (Released:2018-08-01)

著者

田中 良幸 辻 敏夫 金子 真

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) (ISSN:03854221)

巻号頁・発行日

vol.119, no.4, pp.425-431, 1999-04-01 (Released:2008-12-19)

参考文献数

13

---

This paper proposes a new method for dynamic control of redundant manipulators via artificial potential field approach (APFA). The proposed method is based on the APFA with a combination of a time scale transformation and a time base generator which works as a time scale compressor. The dynamic behavior of the manipulator can be controlled by using the proposed method without any change of the form of the designed controller itself. The effectiveness of the proposed method is verified by computer simulations for redundant manipulators.

著者

林 真一 高田 有時 畑崎 恵介

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.1746-1752, 2016-12-01 (Released:2016-12-01)

参考文献数

17

---

For the system providing server SSD (Solid State Drive) cache and volume tiering functions, it is difficult to determine which data to be placed into SSD tier on the basis of the number of I/O (Input/Output). In this paper, we propose a volume tiering method cooperating with the server SSD cache, which counts the number of I/O on the server and allocates storage SSD to read-intensive areas. We conduct an I/O simulation experiment using I/O log traced on the real environment to validate the proposed method. We show that the proposed method reduces I/O average response time by up to 10% compared to the existing method through the I/O simulation experiment.

著者

今村 昌弘 中内 茂樹 臼井 支朗

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) (ISSN:03854221)

巻号頁・発行日

vol.117, no.1, pp.57-62, 1996-12-20 (Released:2008-12-19)

参考文献数

7

---

Since the shape of color gamut differs for each color reproduction device, it is necessary to transform the colors in order to fit them into the reproducible colors, called Gamut Mapping. However, there have been no practical method for gamut mapping so far because it is difficult to describe the shape of gamut effectively. In this paper, we propose a method of extraction and mapping of destination color gamut based on mutual color space conversion between device-dependent and -independent color spaces performed by two multilayered neural networks. Furthermore, we propose a novel method for gamut mapping which adjusts compression ratio adaptively to the shape of gamut.

著者

鹿間 信介 水野 宏亮

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.7, pp.1309-1315, 2013-07-01 (Released:2013-07-01)

参考文献数

16

---

We have conducted a series of studies on a non-contact groove sensing and reproduction of sound signal from phonograph records based on digital image and signal processing. Images of sound grooves were captured by a PC scanner having an appropriate resolution. After an image processing is performed to improve the image contrast, we have investigated filtering methods to extract the position of the groove edges. In addition, we have linearized the arc-shaped groove lines in order to make subsequent signal processing easy. Finally, we have attempted to reproduce the recorded sound waveform using a set of coordinates of the groove edges and created a WAVE-file for sound playback on PCs.

著者

齋田 貢 吉江 達夫 山名 法明 奈良井 啓一 村守 清

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) (ISSN:03854221)

巻号頁・発行日

vol.115, no.6, pp.779-784, 1995-05-20 (Released:2008-12-19)

参考文献数

5

被引用文献数

1

---

The authors started studying and developing a new capacitor used for a 1.5 MHz highly-stable LC tuning circuit in 1963. The high-stability of capacitor was severely required under the conditions that the signal voltage is from 1.4 to 9.2 V, the temperature is from -30 to 65°C and the period is for 20 years. The aging characteristics of the ceramic capacitors available 20 years ago were ΔC/C=±0.1%/year or so, but the requirements was ΔC/C=(-0.01±0.08)%/20 years. In addition, no design method to satisfy the requirements was established.Therefore, the authors developed a ceramic capacitor housed in a low-humidity metallic case using a paraelectric (MgTiO3) element, considering the stability of aging characteristics for 20 years.It could be assumed during the study that the aging characteristics would change almost linearly with the logarithm of time under the influence of humidity. So, the authors proposed the characteristics change for 20 years could be expected based on the data for 10 days of the specimen. To confirm that the proposal was correct, they measured the aging characteristics for 20 years, and found that the measurement value was within the specified value of ΔC/C which was (-0.01±0.08) %/20 years.

著者

西川 久 山口 裕之 西橋 毅 田中 亜実 道関 隆国

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.137, no.11, pp.1435-1442, 2017-11-01 (Released:2017-11-01)

参考文献数

14

---

This paper presents a method of wireless-power transmission to devices which move from close distance to far area from transmitting antenna. UHF range, specifically 430 MHz, was selected in this study so that both of the near-field and the electro-magnetic energy would exist in the applicable distance and the rectenna would be small enough. The resulting hardware is compact and light enough to be installed on a moving target with only minor sacrifices in size and weight. As a demonstration of this concept, a rectenna and two driving motors were embedded in each of the four rotors of a quadcopter. The rotor assembly (rotor, antenna, rectifier, two motors) is powered by UHF waves and rotates around a mechanically fixed shaft. Successful test flights of the quadcopter demonstrate the feasibility of wireless power transmission to mobile targets.

著者

阿部 真 大久保 重範 中津山 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.117, no.4, pp.452-457, 1997-03-20 (Released:2008-12-19)

参考文献数

12

---

We developed a system that composes BGM automatically with color informations of a picture. This system uses only color informations, so it has no object recognitions and can evaluate full-color picture at high speed.In this paper, we propose a concept of characteristic colors for vision-like evaluating. We succeeded in extracting characteristic colors from a full-color picture by using fuzzy theory and proposing a new expression color method, called dome shaped color system. We also were able to compose various progressive patterns with fuzzy theory, in order to coexist general rules and exceptional inflexions of chord progressions for making music.This system is useful for translating visual informations to suitable auditory informations for handicapped persons, also it can be used for educations with high fused audio-visual media, and so on.

著者

山口 昌樹 大向 一輝

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.137, no.2, pp.310-316, 2017-02-01 (Released:2017-02-01)

参考文献数

29

---

Modern society has seen a tremendous growth in the amount of digital data, however a database for human stress currently is not prevalent. Additionally, diagnostic criteria based on evidence, quantitative scales have not been fully established for stress. The purpose of this research is to provide visually presentation method of stress evidence paper in conjunction with web article in order to help people understand and overcome their stress. We propose a stress evidence search engine named “Kokoronoma” incorporated with i) a rate of evidence which express the relationship between the web article and the scientific paper, ii) human machine interface to show the rate of evidence visually. The fabricated stress evidence search engine was evaluated by the 10 young male users to compare with a multipurpose search engine as Google and Google Scholar. Three kinds of search problem as serotonin, mood disorder, and depression were used for the evaluation. As the results, Stress evidence paper and the rate of evidence were showed in conjunction with web article, automatically. The scores of subjective evaluation of the stress evidence search engine for visible observation images, intuitive awareness, and un-complicatedness showed higher than that of the multipurpose search engine. It was considered that the fabricated stress evidence search engine has an effective in reducing the stress of user.

著者

湯本 剛 植月 啓次 松尾谷 徹 津田 和彦

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.137, no.7, pp.987-994, 2017-07-01 (Released:2017-07-01)

参考文献数

21

被引用文献数

1

---

Along with a rapid increase in the size and complexity of software today, the number of required test cases is also increasing. Although a lot of approaches to derive test cases are proposed, in case of deriving test cases for combination of state transition, N-switch coverage using state transition testing is only one approach. This approach cannot manage increasing test cases. In this paper, a practical knowledge to derive high priority procedural combination test cases in test cases from 1-switch coverage using state transition testing is formalized. Procedural combinations between tasks to be tested which is derived from data design documents are defined as rules. It is confirmed that the expected procedural combination test cases can be derived using this approach from a concrete instance of an IT system.

著者

才木 常正 荒木 望 武尾 正弘 吉田 陽一 前中 一介

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.7, pp.1033-1034, 2016-07-01 (Released:2016-07-01)

参考文献数

5

被引用文献数

1 2

---

In this study, we propose a novel fishing support system using millimeter size acceleration sensors for detecting fish bite. On the base of field test, rod top acceleration of vibration with fish bite and its human cognition were investigated by sensor measurement and verbal communication, respectively. As a result, it was shown that an experimental participant could not cognize all of fish bites that were detected by the sensor. Thus, the validity of the fishing support system with the acceleration sensor mounted on a rod top was confirmed.

著者

才木 常正 荒木 望 兼吉 高宏 武尾 正弘 吉田 陽一 前中 一介

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.137, no.5, pp.770-771, 2017-05-01 (Released:2017-05-01)

参考文献数

5

被引用文献数

2

---

In this study, we investigated about fishing gears control when surf casting by a participant. As a result, it was found that the casting distance became longer when the participant released fishing line at the period of time from the maximum to zero of a fishing rod rotation speed. Thus, the validity of a fishing support system, that automatically releases the fishing line at the optimum time decided by the rotation speed data obtained from an acceleration sensor mounted on the fishing rod, was confirmed.

著者

小坂 満隆 明石 吉三 水野 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.110, no.4, pp.263-272, 1990-04-20 (Released:2008-12-19)

参考文献数

7

---

The importance of SIS (Strategic Information System), which supports strategic business operation, has been increasing with the progress of information and communication technology. In SIS, the close connectivity between information and business is a critical success factor. In this paper the authors propose a methodology of planning SIS. First, introducing the business information system diagram, the role of information for business is clarified. Next, such concept is introduced that the information power as effectiveness for business is determined by the connectivity between information quality and information field representing the necessity of information. On the basis of this concept, a methodology of planning SIS, which consists of 3 factors, that is, steps, tools and frameworks, is proposed. The characteristic of the proposed methodology is to find a solution to the complex problem of planning SIS systematically by employing fixed steps, fixed tools and fixed frameworks.

著者

三森 定道

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.9, pp.1017-1021, 1995-08-20 (Released:2008-12-19)

参考文献数

9

著者

莅戸 立夫 裴 鐘石 水野 皓司

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.10, pp.1100-1104, 1999-10-01 (Released:2008-12-19)

参考文献数

24

著者

吉浦 紀晃 小野里 好邦 木村 博茂

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.8, pp.1538-1545, 2004 (Released:2004-11-01)

参考文献数

27

被引用文献数

1

---

In biometric authentication, the biometric data is registered and authentication is done by collation input biometric data with the registered biometric data. If the registered biometric data is stolen, there is a possibility that the the biometric data of registrants may be used improperly. It is very difficult to prevent such improper use because we no longer change biometric data. Therefore it is necessary to pay sufficient attention to the protection of biometric data. This paper proposes the application of one way function to biometric authentication in order to protect biometric data of registrants. We examine and discuss the possibility of application of one way function in biometric authentication.

著者

林田 智弘 山本 透 木下 拓矢 西崎 一郎 関崎 真也 平塚 尚人

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.137, no.2, pp.242-248, 2017-02-01 (Released:2017-02-01)

参考文献数

13

---

A single or multiple kinds of internal or external environmental variations of the system often cause the property variation of any system under control, and the readjustment of controller parameters is required. To maintain high performance of controlling and minimize the total cost for readjustments of the controller parameters, determination the appropriate timing for readjustment the controller parameters is important. This paper proposes new procedure to determine the appropriate timing for the readjustments based on the time-series data using the recurrent neural networks (RNNs). A well coordinated RNN with proper structure has high performance on the predication of time-series data with the assistance of its internal signal feedback structure. This paper conducts some numerical experiments to verify the availability of the proposed method to some systems. The experimental result indicates that the proposed method has higher performance than other existing method with the same aim.

著者

松村 幸輝 衣笠 智 白木 三秀

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.5, pp.718-728, 2014 (Released:2014-05-01)

参考文献数

18

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This paper proposes the expat assessment system for global management personnel training utilizing the data mining employing evolutionary computation. This study follows the three steps. First step is to research those overseas temporary staff by direct hearing and having them answer the questionnaires. The second step is to make the data base with the results acquired from the step one. The third step is to construct the system to assess the prospective staff's aptitude or adaptability. The system would enable to promote the efficiency of assessment and to be useful in their training. This expat assessment system is built with the decision tree of evaluation standard based on the assorting problem solving method. For designing the non-terminal nodes of the decision tree, a new method is proposed utilizing the idea of the association rules, which is a powerful method in data mining. This is done to find out direct factors related to aptitude or suitability for overseas staff. The terminal nodes of the decision tree are to be optimized by Genetic Algorithm (GA) regarding a series of terminal nodes as the individuals forming the linear structure. As a result, the significant factors are found, which are strongly related to aptitude, adaptability and likeliness to be successful overseas. This research has revealed, by applying the system in practice, actual aptitude, skills and personalities required for expats.

著者

稲田 脩二 梶原 祐輔 島川 博光

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.135, no.9, pp.1149-1150, 2015-09-01 (Released:2015-09-01)

参考文献数

3

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The evaluation of past processes of production from farming records enables job-changing middle or advanced farmer to work more effectively. The paper proposes a method to discriminate farm works from viewpoint videos, reducing the load of farmers. In this method, farmers wear a camera embedded in a glasses to acquire viewpoint videos during their farm works. To confirm the effectiveness of the method, it is applied to the discrimination of watering, plowing, adding fertilizer, disbudding, and seeding. As a result, the method has discriminated watering and plowing with high accuracy using routing information of farm works. In addition, this paper has discussed important factor for farm-works discrimination and the problem of viewpoint video.

著者

萩原 朋道 荒木 光彦

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.110, no.4, pp.235-244, 1990-04-20 (Released:2008-12-19)

参考文献数

5

---

This paper studies properties of limiting zeros, which are defined as zeros of sampled-data systems resulting from continuous-time scalar systems preceded by zero-order hold with sufficiently small sampling period. Firstly, the regions are clarified in which the limiting zeros corresponding to the zeros of the original continuous-time system should exist. Secondly, other limiting zeros are studied, which are always yielded when the relative degree of the original continuous-time system is greater than or equal to 2 and do not have any counterpart of the original continuous-time system. To be specific, stability of such a zero is studied for the case where the relative degree of the original continuous-time system is 2. Using the above two results, a condition is derived on which all the limiting zeros are stable.Furthermore, relating to strong stabilizability of sampled-data systems, which is defined as possibility of being stabilized by a stable controller and is equivalent to the parity interlacing property (a condition on the location of real zeros and real poles), some criteria are given with which to examine whether limiting zeros are real or not.