著者

宮崎 和光 吉田 望 森 利枝

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.142, no.2, pp.117-128, 2022-02-01 (Released:2022-02-01)

参考文献数

32

---

In 2017, it became mandatory for universities in Japan to disclose their policies in degree granting (Diploma Policy: DP, hereafter) that state standards to confer degrees. Meanwhile, since 1991, nomenclature of major fields that appear in diplomas has been the responsibility of individual universities, instead of the national regulation. This study examines whether the former reasonably evokes the latter, given that both of them are deemed to represent the learning outcomes that the graduate has obtained. In order to do so, we compared the ability of humans and that of a deep-learning system (which is based on the Character-level CNN), to match DPs and major fields that are randomly given. In the examination of human ability, which was implemented with a large enough number of participants to obtain statistically significant results, we found there were a certain number of DPs that the majority of people failed to match with major fields. Given this fact, we analyzed such DPs to demonstrate that the deep learning system shows a high success rate in sorting out the DPs that poorly evoke major fields.

著者

藤野 秀則 石井 裕剛 下田 宏 吉川 榮和

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.1, pp.11-23, 2008-01-01 (Released:2008-01-01)

参考文献数

39

---

For the sustainable society, organization management not based on the mass production and mass consumption but having the flexibility to meet to various social needs precisely is required. For realizing such management, the emploees' work morale is required. Recently, however, the emploees' work morale is tend to decrease. Therefore, in this study, the authors developed the model of the method for promoting and keeping employees' work morale effectively and efficiently. Especially the authors thought “work morale” of “attitude to the work”. Based on this idea, it could be considered that the theory of the persuasion psychology and various persuasion techniques. Therefore, the model of the method applying the character agent was developed based on the forced compliance which is one of persuasion techniques based on the theory of the cognitive dissonance. By the evaluation experiment using human subjects, it was confirmed that developed method could improve workers' work morle effectively.

著者

米口 遼一 村上 隆啓

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.4, pp.352-359, 2018-04-01 (Released:2018-04-01)

参考文献数

9

---

In recent years, a number of algorithms for controlling parameters of an acoustic signal have been realized according as hardware technologies have been developed. A phase vocoder is one of the widely known methods for time scale modification (TSM) and pitch scale modification (PSM). The phase vocoder converts the length and the pitch of the acoustic signal by increasing or decreasing an instantaneous angular frequency. However, due to the phase unwrapping problem that occurs when the instantaneous angular frequency is estimated, the phase vocoder distorts the waveform of the modified signal. In order to alleviate this problem, we present a new algorithm for the phase vocoder. Our method does not encounter the phase unwrapping problem since we directly use the difference of phases between adjacent analysis frames to avoid estimating the instantaneous angular frequency. Moreover, our approach is effective even when the characteristics of the acoustic signal, e.g., a frequency and amplitude, change rapidly.

著者

弓場井 一裕 寺田 真也 平井 淳之

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 = 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.773-780, 2011-04-01

参考文献数

12

被引用文献数

1

---

In model-free controller syntheses, we have no idea whether the designed controller stabilizes the resulting closed-loop system before its implementation. From the view point of safety of the experimental equipment, we should develop the stability test for model-free controller synthesis using the acquired input/output data. Karimi et al. introduced the sufficient stability condition for the closed-loop system and proposed the stability test for NCbT (Noniterative Correlation-based Tuning) for SISO systems. However, since the positions of the plant and the controller have to be swapped in NCbT, its applicability is restricted to SISO systems.<br>This paper proposes to extend the stability test for NCbT to MIMO systems. The basic idea is to use the special reference <i><b>r</b></i>^[<i>i</i>](<i>t</i>) and to acquire input/output data as many times as the number of plant inputs. The small-gain theorem introduces the sufficient stability condition for the closed-loop system in terms of the <i>H</i>_&infin; norm of the specific transfer function matrix, which is estimated from the acquired input/output data by the spectral analysis method.<br> The effectiveness of the proposed stability test is confirmed by the numerical experiment for LV100 gas turbine engine model and the experiment for tension-and-speed control apparatus.

著者

田村 宏樹 坂田 健一郎 唐 政 石井 雅博

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.9, pp.1918-1919, 2004 (Released:2004-12-01)

参考文献数

5

---

In this paper, we propose a genetic algorithm(GA) with local minimum escaping technique. This proposed method uses the local minimum escaping techique. It can escape from the local minimum by correcting parameters when genetic algorithm falls into a local minimum. Simulations are performed to scheduling problem without buffer capacity using this proposed method, and its validity is shown.

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.140, no.9, pp.NL9_1-NL9_5, 2020-09-01 (Released:2020-09-01)

著者

水野 統太 芳賀 瑞穂 水戸 和幸 板倉 直明

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.4, pp.639-644, 2017-04-01 (Released:2017-04-01)

参考文献数

18

---

A diet is possible by various methods now. Recently, the system which enables a partial thin figure by using ultrasonic wave and laser is developed. However, these methods are at risk of a burn or the internal hemorrhage. Therefore, the establishment of the safe method not to destroy a fat tissue is expected. In this study, warm and cold stimulus and vibration stimulus were given in the thigh posterior surface, we examined subcutaneous fat changes over time. We aimed at the establishment of the possible method of the simple and safe diet and fat movement using these external stimulus.

著者

Yusuke Ozawa Kosuke Oiwa Shunsuke Miyazaki Seiya Nishimura Yasushi Nanai Akio Nozawa

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.140, no.7, pp.769-774, 2020-07-01 (Released:2020-07-01)

参考文献数

19

被引用文献数

4

---

Long-term and continuous vital sign monitoring is essential for the early detection of hypertension. Blood pressure sensing based on non-contact biological measurement indices such as photoplethysmograms and skin temperature that can be obtained using visible light and infrared images has been attempted in previous studies. Near-infrared light has high transmissivity to living tissues and has been used for measuring arterial oxygen saturation. This study aims to improve the accuracy of non-contact blood pressure sensing using near-infrared light.

著者

泉田 喜一郎 椎屋 和久 高橋 洋海 デルウィシュ サラハ

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.122, no.3, pp.498-505, 2002-03-01 (Released:2008-12-19)

参考文献数

13

被引用文献数

1 1

---

This study is concerned with detection of objects in motion from time serial pictures of a 6-D. of freedom motion monocular camera. As a point in real space throw an image on corresponding pixels of time serial pictures. So to solve this problem to find out the corresponding algorithm is essential. In this paper we proposed a new method of the detection of motion objects based on compensating background image shift caused by camera rotation and translation. The main point of this idea is, to take two pictures by the passive sensor (CCD camera) in two different times tk and tk+_??_ while the platform is moving, by correcting them rotationally (also called vertical rectification) the rotation disparity will be excluded, and we get two parallel frames that will be matched through their histograms for the translation-distortion extraction.

著者

斉藤 制海 梅野 孝治 阿部 健一 桑原 耕治 前川 明寛

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.109, no.2, pp.89-96, 1989-02-20 (Released:2008-12-19)

参考文献数

9

著者

高村 芳雄

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.108, no.4, pp.252-259, 1988-04-20 (Released:2008-12-19)

参考文献数

6

被引用文献数

1 1

著者

Ayaka Masaki Kent Nagumo Kosuke Oiwa Akio Nozawa

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.140, no.3, pp.409-410, 2020-03-01 (Released:2020-03-01)

参考文献数

3

---

A large number of traffic fatalities are caused by falling asleep at the wheel. Several drowsiness detection technologies have been developed in recent years. A previous study describes how hemodynamics can vary significantly due to drowsiness. However, it was difficult to estimate drowsiness from the time series of hemodynamics. In this study, general models for estimating three drowsiness levels (i.e., high, medium, and low) based on hemodynamics were constructed using a convolutional neural network for detecting the condition before a state of complete sleepiness is reached, the goal being traffic accident prevention. The results showed that the accuracy of the model was 68.9%.

著者

平岩 星哉 小中 英嗣

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.139, no.12, pp.1415-1419, 2019-12-01 (Released:2019-12-01)

参考文献数

11

---

This paper discusses spot allocation in the national high school rugby tournament based on a quantitative strength evaluation method. In the national high school rugby tournament in Japan, each prefecture receives one spot except Hokkaido, which has two spots; Tokyo, which also has two; and Osaka, which has three. In this paper, Kanagawa and Fukuoka prefectures, whose representative teams achieved outstanding results in recent nationwide tournaments, are considered good candidates for extra spots in the tournament. This paper proposes an Elo-based quantitative skill evaluation method using about 1,800 match results. The evaluation results show high accuracy (84%) in match result prediction. In addition, the gaps between the winners and the finalists in Kanagawa and Fukuoka prefectures can be estimated. According to the results, the second team in Kanagawa ranked in the top 10 in the nationwide tournament; therefore, Kanagawa should receive an extra spot in it.

著者

井田 憲一 菅 良平 玄 光男

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.9, pp.1861-1867, 2004 (Released:2004-12-01)

参考文献数

9

被引用文献数

1 1

---

The greedy algorithm is one of solution methods for knapsack problem. Although this algorithm does not necessarily obtain the optimal solution, it can obtain a good solution in short time. We consider this algorithm is very effective at judging the importance of each item.In this paper, we propose a new genetic algorithm for solving a knapsack problem. The algorithm can adjust a search area in consideration of the stability of each item which can obtain from the greedy algorithm. Moreover, we apply the proposed method to a multi-objective problem and a large-scale problem, and test the effectiveness.

著者

森 友哉 宇都宮 陽一 田 学軍 奥田 隆史

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.139, no.5, pp.648-657, 2019

---

<p>Fog-Cloud computing system has recently attracted much attention. This system has a simple three-tiered hierarchy: Network edge, Fog, and Cloud. Network edge includes IoT (Internet of Things) devices. Fog is localized computing facilities including network devices such as an edge router, a switch and any other. In this system, Fog handles various data processing, which are sensitive to delay, to shorten WAN propagation latency arising from the location of Cloud. However, if the data processing is concentrated on Fog, the delay of the processing and power consumption of the network edge may increase rather than Cloud computing. The reason why is because Fog has more limited resources than Cloud. Therefore, we should decide an appropriate allocation of roles between Fog and Cloud taking the latency of the processing and the power consumption of the network edge into account. In this paper, we consider the design of Fog-Cloud computing taking the latency and cost resulted from the power consumption into account by using a mixed integer linear programming.</p>

著者

増田 礼子 森本 千佳子 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.138, no.8, pp.1011-1019, 2018-08-01 (Released:2018-08-01)

参考文献数

16

被引用文献数

1

---

OSS (Open Source Software) has made remarkable progress in recent years. In ES (Enterprise Software) development process, also the OSS usage has been increasing steadily, which means the impact of OSS to the society has become greater and greater. However, the quantitative analysis for OSS development has been put no particular importance today. In this research, we study to enhance COCOMO model, commonly used for ES development, in order to clarify the relationship between human resources and development volume of OSS development projects. We chose 50 of Large Scale OSS development Projects from GitHub for our analysis, and obtained such three findings as: 1. In OSS development projects, with some arrangement in measuring man-months volume, we found that power formula of COCOMO model can be applied for expressing the relationship between the development volume and the outputs. 2. As OSS development characteristics, with the increase of development volume, the efficiency for development shows the rising trend. 3. The tendency found above has been identified as not the results of diversion as copying and modifying sources nor cumulative contribution made by variety of small developers.

著者

鵜沼 宗利 安生 健一 武内 良三

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.115, no.2, pp.212-221, 1995-02-16

参考文献数

16

被引用文献数

14

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

---

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

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

---

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

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

---

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.