著者

廣芝 伸哉 牧野 賀成 道端 涼 広藤 裕一 小池 一歩

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.143, no.4, pp.498-503, 2023-04-01 (Released:2023-04-01)

参考文献数

16

---

An extended-gate field effect transistor (EGFET) based creatinine sensor using an enzyme-containing silk-fibroin membrane successfully fabricated. In this experiment, we used creatinine deiminase as a detection enzyme for serum creatinine, which is known as a marker of chronic kidney disease. The fabricated biosensor showed excellent potentiometric response to creatinine over a wide range from 0.007 - 0.4 mg/mL in phosphate buffer solution, which can enable to measure creatinine concentration in blood plasma.

著者

松村 幸輝 河元 勝

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.3, pp.455-466, 2012-03-01 (Released:2012-03-01)

参考文献数

32

---

This paper proposed a new technique which makes the strategy trees for the derivative (option) trading investment decision based on the behavioral finance theory and optimizes it using evolutionary computation, in order to achieve high profitability. The strategy tree uses a technical analysis based on a statistical, experienced technique for the investment decision. The trading model is represented by various technical indexes, and the strategy tree is optimized by the genetic programming(GP) which is one of the evolutionary computations. Moreover, this paper proposed a method using the prospect theory based on the behavioral finance theory to set psychological bias for profit and deficit and attempted to select the appropriate strike price of option for the higher investment efficiency. As a result, this technique produced a good result and found the effectiveness of this trading model by the optimized dealings strategy.

著者

上保 徹志

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.125, no.11, pp.1646-1651, 2005 (Released:2006-02-01)

参考文献数

18

被引用文献数

14 13

---

Various types of radars have been developed and used until now—such as Pulse, FM-CW, and Spread Spectrum. Additionally, another type of radar has been proposed recently. The radar measures distance by using standing wave and has been named as “Standing Wave Radar." Standing wave radar has a shorter minimum detectable range and higher accuracy compared to other types. However, the radar can not measure distance down to zero meters like other types of radars. Minimum detectable range of the standing wave radar depends on a usable frequency range. A wider frequency range is required if we need to measure shorter distance. We show a new method for measuring distance down to zero meters without expanding the frequency range. Specifically, we derive an analytic signal, which is a complex sinusoidal signal, by processing the signals obtained from multiple detectors, and we calculate and obtain distances by Fourier transform of the analytic signal. We then verify the validity of our method by simulations based on numerical calculation. The results show that it is possible to measure distance down to zero meters. In our method, measurement errors are caused by gain deviation of the detectors. They are several cm if the gain deviations are less than ±1%. Prevalent radars still have a common defect that they can not measure distance from zero to the minimum detectable range. We expect that the defect will be eliminated by putting our method into practical use.

著者

伊藤 満代 小矢 美晴 溝尻 勳

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.2, pp.425-430, 2004 (Released:2004-05-01)

参考文献数

17

---

Presently, many of the already proposed blood circulation models are mainly partial models although they are precise models. A complete model that is a combination of these partial models are difficult to analyze because it is complicated to consider both the viscosity of blood and circulatory details at the same time. So, it is difficult to control the model parameters in order to adapt to various cases of circulatory diseases. This paper proposes a complete circulation model as a lumped electrical circuit, which is comparatively simple. In the circuit model, total blood is modeled as seven lumped capacitors, representing the functions of atriums, ventricles, arteries, veins and lungs. We regard the variation of the ventricle capacitance as the driving force of the complete circulation model. In our model, we considered only the variation of pressure between each part and the blood capacity of each part. In particular, the contraction function of the left ventricle is examined under the consideration of whole blood circulation.

著者

永妻 忠夫

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.128, no.6, pp.832-837, 2008-06-01 (Released:2008-06-01)

参考文献数

31

被引用文献数

1 1

---

Terahertz (THz) electromagnetic waves, which cover an unexplored portion of spectrum between infrared and microwaves at frequencies from 100 GHz to 10 THz, have been expected to offer innovations in sensing, imaging, spectroscopy, and communications. This paper reviews recent advances in the terahertz technology, focusing on recent system applications and key devices to enable practical use.

著者

川中 普晴 山本 康高 吉川 大弘 篠木 剛 鶴岡 信治

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.6, pp.1023-1032, 2002-06-01 (Released:2008-12-19)

参考文献数

10

被引用文献数

2

---

Nurse Scheduling Problem (NSP) is the problem that allocating shifts (day and night shifts, holidays, and so on) for nurses under various constraints. Generally, NSP has a lot of constraints. As a result, it needs a lot of knowledge and experience to make the scheduling table with its constraints, and it has been made by the head nurse or the authority in the hospitals. Some researches for NSP using Genetic Algorithm (GA) have been reported. The conventional methods take the constraints into the fitness function. However, if it reduces the fitness value a lot to the parts of solution against the constraints, it causes useless search. Because most of chromosomes are selected in the initial population or as the change by the genetic operations. And if it doesn't reduce the fitness value so much, the final solution has some parts against the constraints. Some of them are established by the Labor Standards Act or the Labor Union Act, so the solution has to be modified. As a result, it is difficult to acquire an effective scheduling table automatically. We study the method of the coding and the genetic operations with their constraints for NSP. In this paper, we propose a new coding method and genetic operations considering the constraints. We apply this method to the NSP using actual shifts and constraints being used in a hospital. It shows that an effective scheduling table satisfying the constraints is acquired by this method.

著者

栗原 陽介 渡辺 嘉二郎 米山 満

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.129, no.8, pp.1562-1568, 2009-08-01 (Released:2009-08-01)

参考文献数

12

被引用文献数

1 2

---

It is quite important for Japan to maintain or promote the health condition of elderly citizens. Given the circumstances, the Ministry of Health, Labour and Welfare has established the standards for the activities and exercises for promoting the health, and quantitatively determined the exercise intensity on 107 items of activities. This exercise intensity, however, requires recording the type and the duration of the activity to be calculated. In this paper, the exercise intensities are surmised using 3D accelerometer while the subjects are walking and running. As the result, the exercise intensities were surmised to be within the root mean square error of 1.2[METs] for walking and 3.2[METs] for running respectively.

著者

渡辺 茂 岩田 純蔵 平野 睦房

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.92, no.1, pp.55-62, 1972 (Released:2008-12-19)

参考文献数

2

著者

中野 博民 内藤 雅将 近藤 良

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.118, no.7-8, pp.1122-1129, 1998-07-01 (Released:2009-10-02)

参考文献数

11

---

Usually, analysis of a conventional symmetrical 3-phase feed-back control system can be done using a single-phase conventional transfer function. However, analysis of 3-phase system having rotating coordinate transformations is difficult by the conventional transfer function. Because, the conventional transfer function cannot deal with the control system having the rotating coordinate transformation inserted in the feed-back loop. Therefore, in this paper, the authors propose a novel extended transfer function with the rotating coordinate transformations and analyze the system having a rotating coordinate transformations.

著者

谷口 正成 高木 相

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.113, no.4, pp.238-244, 1993-04-20 (Released:2008-12-19)

参考文献数

16

---

In this study, the temperature and displacement of printed circuit board (PCB) due to heat of mounted parts were measured by using a thermographic video system and a holographic interferometry measuring system. The relationship between temperature and displacement was studied from the experimental results.As the results, the temperature and displacement on the PCB surface have been influenced with heat of mounted components due to current flow. The distribution of temperature showed some different relationships with the characteristics of the deformation. Therefore, the holographic pattern testing method may be useful in analysis of the detailed thermal stress evaluation of PCB surface and mounted parts.

著者

浅野 利郎 萩原 将文

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) (ISSN:03854221)

巻号頁・発行日

vol.122, no.2, pp.217-223, 2002-02-01 (Released:2008-12-19)

参考文献数

30

被引用文献数

1 1

---

In this paper, we propose a new system reflecting user's emotion in a virtual space. In the system, a user inputs his/her emotion using 6 emotional parameters in detail, and he/she chooses some shapes of objects to exist in a virtual space. From these information, the proposed system reflects user's emotion in 6 aspects using fuzzy logic and weighted average calculation. The aspects are 1) an extent of the space, 2) background colors of the space, 3) colors of the objects, 4) size of the objects, 5) moving speed of the objects, and 6) the number of the objects. In the created virtual space, user can go forward, go back and turn as he/she likes. The system is evaluated by objective questionnaires by 13 testees and the effectiveness has been shown.

著者

鈴木 元哉

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.8, pp.959-970, 2022-08-01 (Released:2022-08-01)

参考文献数

33

被引用文献数

2

---

Estimated response iterative tuning (ERIT) can updated the feedforward controller so as to realize desired closed-loop responses. If ERIT can be applied to vehicle yaw-rate control of automated vehicle, good autonomous driving can be realized. However, ERIT cannot realize desired control performance in the case where the control signal velocity is saturated. To solve this problem, I propose a new data-driven tuning method for vehicle yaw-rate control. Proposed method can update the feedforward controller by using estimation method of a closed-loop transfer function. Compared to ERIT, the proposed method can realize desired control performance even when the initial steering angle velocity is saturated. Furthermore, the proposed method can predict vehicle yaw-rate/steering angle velocity responses. The validity of proposed method is verified through vehicle simulators.

著者

安井 崇 佐藤 勝 武山 真弓

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.7, pp.812-813, 2019-07-01 (Released:2019-07-01)

参考文献数

8

被引用文献数

1

---

Freshness evaluation of Ezoshika meat based on bioelectrical impedance analysis (BIA) using LCR meter is carried out to estimate the quality of the meat. An arc is extracted from a locus of measured impedance to evaluate the condition of the meat. It is revealed that freshness of the meat may be estimated from the position of center of the arc. The arcs obtained by two types of equivalent-circuit models and a simple least squares method (LSQ) are compared. It is also found that the arc extracted by the LSQ explains the measured result well.

著者

南 政孝 塩井 太介 茂木 進一 道平 雅一

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.4, pp.280-286, 2019-04-01 (Released:2019-04-01)

参考文献数

43

被引用文献数

2

---

The grid connection inverter is built in the PCS (Power Conditioning Subsystem) for the distributed power supply, such as photo voltaic system. In order to utilize the power source, it is necessary that the grid connection inverter of the PCS predicts the load and output fluctuation in customer side. Therefore, this paper investigates a load estimation in the grid connection inverter of the PCS. The proposed estimation method adds superimposing perturbative signals in the inverter reference. The validity of the proposed estimation method is experimentally verified. In addition, the perturbative signals for load estimation consist of three different frequency components. As the result, it is experimentally clarified the proposed method improves the estimation accuracy.

著者

山田 隆亮 越前 功 手塚 悟 吉浦 裕

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.126, no.9, pp.1127-1137, 2006-09-01

参考文献数

17

被引用文献数

4

---

Emerging broadband networks and high performance of PCs provide new business opportunities of the live video streaming services for the Internet users in sport events or in music concerts. Digital watermarking for video helps to protect the copyright of the video content and the real-time processing is an essential requirement. For the small start of new business, it should be achieved by flexible software without special equipments. This paper describes a novel real-time watermarking system implemented on a commodity PC. We propose the system architecture and methods to shorten watermarking time by reusing the estimated watermark imperceptibility among neighboring frames. A prototype system enables real time processing in a series of capturing NTSC signals, watermarking the video, encoding it to MPEG4 in QGVA, 1Mbps, 30fps style and storing the video for 12 hours in maximum

著者

鈴木 宏和 矢野 雅文 田仲 広明 清水 博

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.107, no.11, pp.1027-1034, 1987-11-20 (Released:2008-12-19)

参考文献数

7

著者

弥富 昭男

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:03854221)

巻号頁・発行日

vol.114, no.2, pp.158-163, 1994

著者

佐藤 太亮 三宅 真立 金子 修

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.3, pp.299-306, 2022-03-01 (Released:2022-03-01)

参考文献数

14

被引用文献数

5

---

In this paper, we propose a method to achieve a given desired tracking property with only minimal information on the control target by combining FRIT with some extensions to the intelligent PID control system. The intelligent PID control system has a simple structure and can stabilize a system using only parameters without requiring much dynamic characteristics of a control target. Here we firstly extend the intelligent PID to Proportional differentiel leading typed PID controller, which is abbreviated as iI-PD controller, to guarantee the stability of the closed loop for broader class of plants compared with the original inteliggent PID control systems. Secondly, we apply FRIT to decide the parameters of a controller with only one-shot experiment to follow the desired response. Thus, by combining FRIT, we obtain controller parameters which is adjusted so that it enable not only output to follow the desired response but also guarantee the stability of the closed loop system with only an initial experimental data. We also verify the effectiveness of the proposed method with numerical examples.

著者

若狭 拓馬 澤田 賢治

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.3, pp.239-250, 2022-03-01 (Released:2022-03-01)

参考文献数

19

---

This paper considers an interpolated distributed cooperative observer design and its online update for the situation that intelligent transport systems (ITS) and vehicles estimate vehicle platoons' positions in a two-dimensional plane. ITS observes some vehicles' absolute positions, and each vehicle interpolates its position based on the observed relative distance to the surrounding vehicles and the vehicles' estimated position. The observers of each vehicle use the interpolated positions to estimate their vehicles' positions. The interpolated positions are updated depending on the communication status of the surrounding vehicles using sparse modeling. We provide a distributed search algorithm to generate the shortest communication path that can share the estimated position among the observers in a short time. These methods enable us to estimate the distributed position of vehicle platoons under the condition that the positional relationship between vehicles changes on a two-dimensional plane.

著者

盛岡 寛史 仲谷 美江 西田 正吾

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.125, no.8, pp.1266-1275, 2005-08-01

参考文献数

13

被引用文献数

1

---

This paper proposes an algorithm for synthesizing music suitable for emotions in moving pictures. Our goal is to support multi-media content creation; web page design, animation films and so on. Here we adopt a human dance as a moving picture to examine the availability of our method. Because we think the dance image has high affinity with music. This algorithm is composed of three modules. The first is the module for computing emotions from an input dance image, the second is for computing emotions from music in the database and the last is for selecting music suitable for input dance via an interface of emotion.