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115 巻, 11 号
選択された号の論文の26件中1～26を表示しています
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武田 洋次1995 年 115 巻 11 号 p. 1223
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーPDF形式でダウンロード (124K) -
岩佐 健司, 森住 昇, 大松 繁, 服部 洋文1995 年 115 巻 11 号 p. 1224-1231
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーThis paper considers a pressure control problem of a chemical plant which produces soda and chloride by electrolysis of salt water. In order to reduce the electrical cost, this plant adopts a switching method of electric current twice a day, which causes fluctuations of pressure inside electrolytic tanks. Conventional PID controllers are used in order to stabilize the pressure and it generally needs much effort and time to tune PID gains.
In this paper, we propose a tuning method of a PID controller based on the Back-Propagation (BP) method of four layered neural networks. In the fourth layer, linear neurons are used to adjust the magnitudes of PID gains. Finally, pressure control results for an electrolytic tank have been illustrated to show the effectiveness of the present approach.抄録全体を表示PDF形式でダウンロード (1292K) -
片山 秀一, 津田川 勝1995 年 115 巻 11 号 p. 1232-1236
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーIn an industrial field a technique called a vibrate-acceleration method which translates vibration of bearing to electrical signal has been widely used for detection of abnormality of a ball-bearing. However, any authorized rule to decide whether a bearing is abnormal or has not been yet established. Presently, final decision dependents in the intuition of an expert.
Then this paper proposes a technique to automatically decide abnormality of ball-bearings by using a two dimensional graphic plane with axis of frequency and time and neural-networks. Effectiveness of the technique is confirmed experimentally. In the experiment, fractal dimension of the graphic plane is firstly measured, and we confirm it has strong correlation with R. M. S. of the vibration-accelation signal. Then we construct a neural network as it makes an input plane for neural-networks the graphical spectal plane. We could have justify accuracy more than 70 percent for nine samples involving abnormal ones.抄録全体を表示PDF形式でダウンロード (1694K) -
溝尻 勳, 八杉 直人, 神谷 邦明1995 年 115 巻 11 号 p. 1237-1244
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーLeft venticular thickness, diameter and their time variance play important role in an assessment of a cardiac function using echocardiography. In order to measure left venticular wall thickness and diameter from echocardiogram, it is required to detect a border which is a boundary between cardiac mussle and blood.
In this paper, we propose a detection method of the border of left venticle from echocardiogram. The border of left venticle has distinctive feature of a smooth continuous curve on echocardiogram. We detect the smooth border of left venticle as Fourier series with several harmonics, and determine Fourier coefficients to be the maximum summation of a echo strength gradient on the border curve. Finally, usefullness of this method is demonstrated shoing some examples.抄録全体を表示PDF形式でダウンロード (3963K) -
乾 喜好, 小南 昌信, 日下 浩次1995 年 115 巻 11 号 p. 1245-1251
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーThe LC resonant circuit security tag, which is a kind of the data-carriers, has become to be used for its simple constitution. But, a basic concept of the design theory of the tag's quality has not been revealed clearly enough until now and its detailed consideration is much expected.
In this paper, by using the electric circuit theory, we analyze an interaction, between the tag and the detecting system, corresponding to a basic characteristics of the tag. Then, the design theory is provided through the theoretical analysis, and the theory is confirmed experimentally with the measuring apparatus of the basic characteristics. By a consideration of a simple model of the tag, we reveal a simulation formula of the quality of the tag. In addition, the tag having new constitution without interconnecting the both sides of aluminum foils and the small-sized tag with a novel insulating film are proposed.抄録全体を表示PDF形式でダウンロード (1411K) -
吉岡 武, 村中 徳明, 今西 茂1995 年 115 巻 11 号 p. 1252-1258
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーIn this paper, we discuss bidirectional current-mode adders using the 5-valued 3-radix Signed-Digit number representation and examine how it can be more high-speed and how can it be more compact. And then, we examine Threshold Detector which is composed of n-MOS's and construct bidirectional current-mode adders with the detector by using the 3-radix Signed-Digit number representation.抄録全体を表示PDF形式でダウンロード (1314K) -
小南 昌信, 松下 宗博, 平田 明史, 日下 浩次1995 年 115 巻 11 号 p. 1259-1264
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーThe use of spread spectrum technique for the location of the transmitter in an indoor environment is described. The core of this system is a small device called data carrier that can be attached or embedded in an object. Radio propagation through indoor channels is very complex because there are many paths with different power which transfer radio waves from transmitter to the receiver. A deterministic analysis of propagation mechanisms in such an environment is used. The analysis uses 1) the method of moments to approximate the currents induced on the wires by the incident field, and 2) Fourier transform techniques to describe the signal in both the space and the frequency domains, in order to obtain an expression relating the transfer function between transmitter and receiver antennas. Numerical results for a wide range of location are obtained through analytical calculation of the correlation function combined with the computational electromagnetics approach. The factors which influence the type of PN code positioning are discussed, and the performance of this system is presented for various configurations.抄録全体を表示PDF形式でダウンロード (792K) -
増田 達也, 伊藤 彰朗, 佐藤 幸史1995 年 115 巻 11 号 p. 1265-1272
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーSome methods for acquiring fuzzy reasoning rules by standard genetic algorithm have been proposed. These methods use a genetic code which contains locuses corresponding to all consequent selections of fuzzy reasoning rules, so that the length of gene becomes very longer as the number of reasoning rules increases. As the result, it is difficult to identify exactly all reasoning rules and to understand their contents.
In this paper, we propose a new method for acquisition of fuzzy reasoning rules to solve this problem. The genetic algorithm we use for this method has a dynamic adjustable function of the length of gene, so that we can obtain only necessary rules to express the characteristics of a controlled object. The rule acquisition process used by this method closely resembles that by which humans create fuzzy reasoning rules by trial and error. We demonstrate the effectiveness of this method by applying it to an obstacle avoidance problem of mobile robot.抄録全体を表示PDF形式でダウンロード (1145K) -
森本 茂雄, 亀山 浩幸, 武田 洋次1995 年 115 巻 11 号 p. 1273-1278
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーIn the industrial motor drive systems such as industrial plants and industrial robots, a torsional vibration is often generated because of the elastic elements in torque transmission. This vibration makes it difficult to achieve quick responses of speed and may result in damage to the plant. Such system is simply modelled as a two-mass system. The shaft torque feedback system with the disturbance observer, which is called “resonance ratio control”, is proposed to suppress the vibration for the two-mass system.
In this paper, the design of controller gains in the shaft torque feedback system is examined considering not only the control performance such as the vibration suppression and dynamic responses but also the robust stability against the noise and the model uncertainties. The validity of the control system and the examinations in this paper is shown by several experiments.抄録全体を表示PDF形式でダウンロード (1294K) -
飯間 等, 三宮 信夫1995 年 115 巻 11 号 p. 1279-1284
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーMost combinatorial optimization problems arc NP hard, and then the enumeration method is the only method to obtain the optimal solution. A large cumber of studies have been done for obtaining a suboptimal solution efficiently. Recently there has been renewal of interest in applying genetic algorithm (GA) to such problems.
In GA individual description is very important by reason that the accuracy of the solution depends strongly on the individual description. This paper aims at investigating the best selection of sequencing individual description in GA. Especially, our attention is paid to the relation between the genotype and the phenotype. For this purpose, an asymmetry traveling salesman problem is considered as an illustrative example. Four individual descriptions for the problem are proposed, and the accuracy of the suboptimal solution obtained is examined for each individual description.抄録全体を表示PDF形式でダウンロード (703K) -
小西 啓治, 川畑 洋昭, 武田 洋次1995 年 115 巻 11 号 p. 1285-1290
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーA trained neural network controller (NNC) can stablilze accurately unstable periodic orbits embedded within a chaotic attractor. A procedure for training the NNC consists of two training processes, off-line and on-line training processes, These training processes do not requir the equation of the chaotic system and the accurate location of the unstable periodic orbits. Furthermore, the trained NNC can track unstable periodic orblits in the chaotic system wohose parameter is slowly varied.抄録全体を表示PDF形式でダウンロード (1434K) -
森 禎弘, 森 武宏, 黒江 康明1995 年 115 巻 11 号 p. 1291-1296
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーIn this paper. we discuss quadratic stability and stabilization of uncertain discrete time linear systems. The uncertainty is supposed to take a polytopic form in the system matrix. It is known that for a polytope of matrices to be quadratically Schur stable, Schur stability of all of it's vertex matrices is necessary and sufficient. Therefore we first show some classes of systems having common quadratic Lyapunov functions. These are derived from the commutativity assumption of a set of matrices. Using this result, we show some classes of the uncertain systems which are quadratically stable.
Based on the stability result, it is possible to stabilize the uncertain systems quadratically. We next propose a method of stabilizing the uncertain systems with a state feedback. It is shown that a feedback matrix is obtaind by a linear matrix inequality. Some numerical examples are worked out to illustrate these results.抄録全体を表示PDF形式でダウンロード (1071K) -
田口 耕造, 清水 修介, 金端 利典, 中西 恒彦, 溝尻 勲1995 年 115 巻 11 号 p. 1297-1303
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーIt is very useful to track moving vehicles for monitoring system such as automatic counting of vehicles. In this paper, we propose measurement method of moving vehicles based on tracking loci of moving vehicles in sequential images. Our proposed tracking system is composed of extracting module, matching module and tracking module. The relation of vehicle regions is obtained using overlapping of the extracted vehicle regions between the current frame and the previous one. Then, the directed graph of barycenter of vehicle region is drawn using the matching result of vehicle regions. Regardless of occlusion of vehicles in the image, our system is able to track moving vehicles correctly by analyzing the directed graph.
At the end of this paper, we show usefullness of this method to analyze the motion of moving vehicles at a junction.抄録全体を表示PDF形式でダウンロード (3995K) -
近藤 広隆, 中西 恒彦1995 年 115 巻 11 号 p. 1304-1309
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーThis paper deals with a noncontact method to measure the width of vehicles by image processing.
There are many methods to measure the length of objects, but it is difficult to measure the length of moving objects without stopping. So a noncontact measurement method is needed for the vehicle width measurement. This paper reports the simple system construction using a portable camera and a personal computer, and reports calculating method using Fourier Transformation to achieve noncontact measurement of vehicle width.
We consider that the brightness of a vehicle on the image differs from background. The general measurement method is to count the pixels count or edge of difference in the brightness between a vehicle image and the background image, but the accuracy of this method is not high enough. We make a spatial frequency spectrum of the image for scale of measurement, which corresponds to vehicle width, and we reanalyze the frequency analysis of the brightness spectrum. Then, we are able to obtain the vehicle width.
In this paper, we show the usefulness of this method for the width measurement of vehicles in the traffic flow.抄録全体を表示PDF形式でダウンロード (1927K) -
土井 滋貴, 高橋 晴雄, 松田 稔1995 年 115 巻 11 号 p. 1310-1316
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーIn a shape recognition, an object shape can be constructed by pasting some faces. The determination of the faces requires a precision distance measurement. In this paper, we suggest a distance mesuring system combining ultrasonic sensors with the scale-space filtering. For the signal processing using the scale-space filtering, tracing the fingerprint calculated by the scale-space filtering is important. We present two tracing methods, one method is to use a rule-based system on feature paramaters extracted from patterns of the fingerprint, and another method is to correct by a phase matching in addition to use the rule-based system. And also expriments of distance mesuring for determination of the identical faces are discussed. The experimental results has shown that the distance mesurement using the scale-space filtering has the advantage of precision.抄録全体を表示PDF形式でダウンロード (1348K) -
荻原 昭夫, 新谷 輝, 土居 直史, 福永 邦雄1995 年 115 巻 11 号 p. 1317-1324
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーIn the field of speech recognition, many researchers have proposed speech recognition methods using auditory information like acoustic signal or visual information like shape and motion of lips. Auditory information has valid features for speech recognition. but it is difficult to accomplish speech recognition in noisy environment. On the other side. visual information has advantage to accomplish speech recognition in noisy environment, but it is difficult to extract effective features for speech recognition. Thus, in case of using either auditory information or visual informaion. it is difficult to accomplish speech recognition perfectly.
In this paper. We propose a method to fuse auditory information and visual information in order to realize more accurate speech recognition. The proposed method consists of two processes: (1) two probabilities for auditory information and visual information are calculated by HMM, (2) these probabilities are fused by using linear combination. We have performed speech recognition experiments of isolated words and have confirmed the validity of the proposed method.抄録全体を表示PDF形式でダウンロード (1670K) -
和田 賢一, 泉 正夫, 福永 邦雄1995 年 115 巻 11 号 p. 1325-1331
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーThis paper describes a new method of 3-D object recognition and pose estimation. Firstly, our method extracts 2.5-D information from input sequential images with epipolar equations. In the next, using the similarity of the relation of feature points between the input image and models, the pose of the object in the scene and positions of feature points are extracted. Thirdly, clusterring of six degree feature space, pose and position, are examined with vectors of feature points calculated in the previous step. And pose and position estimation is engaged with several models in the database. Finally the object in the scene is recognized as the model which has the largest certainty factor of pose and position estimation. Experimental results show our proposed method is robust from noise and complex background in the image.抄録全体を表示PDF形式でダウンロード (1288K) -
崔 載承, 岡本 次郎, 細川 省一1995 年 115 巻 11 号 p. 1332-1337
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーOn the field of speech processing, the treatment of noise is still important problems for speech research. Especially, it has been noticed that the background noise causes remarkable reduction of speech recognition ratio. As the examples of the background noise, there are such various non-stationary noises existing in the real environment as driving noise of automobiles on the road or typing noise of printer. The treatment for these kinds of noises is not so simple as could be eliminated by the former Winer filter, but needs more skillful techniques. In this paper as one of these trials, we show an algorithm which is a speech enhancement method using a model of mutual inhibition for noise reduction in speech which is contaminated by white noise or background noise mentioned above. For evaluating speech quality we used the spectral distortion ratio (SD).抄録全体を表示PDF形式でダウンロード (1172K) -
石川 明, 森川 雅司, 貴志 宗紀, 沓山 弘, 河田 宏, 塚本 一義1995 年 115 巻 11 号 p. 1338-1344
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーIn recent years, genetic algorithms (GA) which simulate the process of natural evolution have gained attention as a means of solving optimization problems, beginning with scheduling problems.
This paper intends for the problem of division of orders (unit quantity of manufacturing units comprising one type of model) in production process scheduling. In actual production activity, since some orders cannot be completed by the delivery date due to the production situation at the factory or the customer's requirements, scheduling is conducted to divide an order among many machines. The introduction of order division also has considerable effects on improving the operation rate of production equipment and reducing total production time. However, there are many combinations for determining which orders should be divided and how many machines they should be divided among, and no effective solution has yet been reported.
We suppose that GA is effective for solving the combination problem mentioned above. This paper proposes an individual description of GA which realizes optimum order division, and reports experimental results of our simulation.抄録全体を表示PDF形式でダウンロード (1552K) -
永目 誠吾, 神原 正樹, 河合 壯, 吉野 勝美1995 年 115 巻 11 号 p. 1345-1348
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーThis study was carried out to clarify the inhibiroty effects of the powdered semiconductor TiO2 with a photocatalytic reaction on oral cariogenic streptococci by cyclic voltammetry. Three bacterial strains (Streptococcus mutans NCTC 10449, S. mutans NCTC 10449, S. cricetus HS-6, S. sobrinus AHT) were suspended in phosphorous buffer solution (pH 7.0) containing TiO2 (0.1% W/V) powder. Oxidation peak current (Ipa) and potential (Epa) of the anodic peak in TiO2-bacterial solutions were measured by cyclic voltammetry. Strains of streptococci showed different Ipa but there was no marked difference in the Epa. Cyclic votlammograms of TiO2-bacterial solutions were different from those of control samples without TiO2; Ipa decreased markedly, while Epa showed no marked change. Specific adsorption behavior of these bacteria to TiO2 was observed by scannning electron miroscopy.抄録全体を表示PDF形式でダウンロード (1296K) -
小南 昌信, 和田 友孝, 高正 信生, 日下 浩次, 綱崎 勝1995 年 115 巻 11 号 p. 1349-1354
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーSpread spectrum techniques have been researched in recent years in a broad area of applications. In applications other than communications, spread spectrum signals are used to obtain accurate range (time delay) and range rate (velocity) measurements in radar and navigation. In designing ranging system, we should consider characteristics of signal waveform, characteristics of electromagnetic field nearby transmitting and receiving antennas and target. In this article, we present a method for unified analysis of two types of pulse compression radar system. The analysis is based on a moment method and Fourier transform. It is profitable in our numerical analysis that the transfer function of propagation channel is not obtained by statistical results, but determine by electromagnetic theory. This method gives a clear physical pictures of the pulse compression and noise reduction mechanism. We also proposed a new type PN code radar system using base band pulse signal. Significant improvement of range resolution is obtained.抄録全体を表示PDF形式でダウンロード (923K) -
曽我 修治, 山本 康文, 大川 剛直, 薦田 憲久1995 年 115 巻 11 号 p. 1355-1361
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーPrecise understanding of market trends is one of the most important issues for many enterprises. Marketing research using questionnaire survey is frequently performed as an effective method for understanding of market trends. In marketing research using questionnaire survey, analyzing and interpreting data are one of the most critical activities. Actually, it takes lots of time and effort for researchers to perform the activity because of examination of a large number of data from various viewpoints. Furthermore, it needs skillful techniques to acquire reasonable interpretation of questionnaire results.
In this paper, cases of questionnaire results interpretation with experts are analyzed and useful techniques for the interpretation are found out. On the basis of this argument, we propose a support method for questionnaire results interpretation for characteristic data extraction. In this method, using a rule base which has been constructed based on expertise knowledge, characteristic data is extracted and comments for the data are created from questionnaire results. Based on the method, we have developed a support system for questionnaire results interpretation, named SQUARE. An outline of SQUARE is briefly illustrated and the evaluation of this system is reported.抄録全体を表示PDF形式でダウンロード (2258K) -
川田 明, 林 重雄1995 年 115 巻 11 号 p. 1362-1368
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーThis paper presents a new method of failure diagnosis by neural network which has been learning with spectra of normal mode and artificial abnormal mode. The data of normal mode can be obtained easily from normal operating machine before failure, and artificial abnormal data are made with the pseud-random numbers. In actuality, it is difficult to make preliminary arrangements for varied abnormal mode. Therefore, the method using artificial abnormal data is practically very usefull.
The effectiveness of proposed method is confirmed by diagnosis of ball-bearing defects. We consider also the degree of spectral resolution have an effect on the rate of correct diagnosis.抄録全体を表示PDF形式でダウンロード (1175K) -
畑 慎也, 大川 剛直, 薦田 憲久1995 年 115 巻 11 号 p. 1369-1376
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーFor strategy planning in organizations, ascertaining the effectiveness of each policy for improvement of organizations is important. It is useful to grasp target behavior caused from a policy through a structural model representing casual relations among several factors. We have proposed a qualitative simulation method, which can envisage behabiors of a system modeled by the structural model as a computer support of strategy planning.
In the qualitative simulation method, however, several numbers of simulation experiments by trial and error, which correspond to changes of conditions or policies, are required to find out a preferable strategy. In this paper, a method which backwardly derives policies from the behavior of the target, named backward simulation, is considered. This method aims at support of strategy planning, by presenting policies for problem soloving to the user efficiently without trial and error. Through the experiment of planning of management strategy for a fashion specialty store using the method, the effectiveness of the method is clarified.抄録全体を表示PDF形式でダウンロード (1398K) -
増田 達也, 前西 成樹1995 年 115 巻 11 号 p. 1377-1378
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーPDF形式でダウンロード (990K) -
神徳 徹雄1995 年 115 巻 11 号 p. 1379-1382
発行日: 1995/10/20
公開日: 2008/12/19
ジャーナル フリーPDF形式でダウンロード (1195K)
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