JaLCDOI 10.18926/19616
フルテキストURL Mem_Fac_Eng_OU_33_1_53.pdf
著者 Li Sen| 大崎 紘一| 梶原 康博| 宗澤 良臣|
抄録 A method for designing a monitoring system with multiple cameras is proposed in order to supervise and recognize the progress of wide work area. First, a wide view camera is deveeloped by combining several usual cameras so that its visual angle could cover more than π/2. Secondly, A method for determining the number and location points of cameras is proposed by considering the shape of monitored area and the installation cost of cameras. The monitored area is divided into three kinds of basic shape (rectangular form, L form and convex form). For every basic shape area, the camera is located at the vertex pasition, so that the whole area can be monitored by the camera.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1998-11-30
33巻
1号
開始ページ 53
終了ページ 57
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002309122
JaLCDOI 10.18926/15411
フルテキストURL Mem_Fac_Eng_OU_29_2_13.pdf
著者 Dwianto Gatot| 大崎 紘一| 梶原 康博|
抄録 We propose a method to design the supplying method of parts to an assembly line. Three types of supplying model (Serial, Parallel, and Mixed) are proposed based on the relation between the area of part and that of the transportation equipment. The part is supplied by the pallet on which the all parts of one product are arranged or by the lot of one part. AGV or conveyor are used to transport the pallet. The supplying model is evaluated from the total transportation cost calculated from the price of the transportation equipment and of land.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1995-03-27
29巻
2号
開始ページ 13
終了ページ 21
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307903
JaLCDOI 10.18926/14156
フルテキストURL Mem_Fac_Eng_39_1_71.pdf
著者 Nogami, Yasuyuki| Morikawa, Yoshitaka|
抄録 This paper proposes an algorithm for generating prime order elliptic curves over extension field whose extension degree is a power of 2. The proposed algorithm is based on the fact that the order of the twisted elliptic curve is able to be a prime number when the extension degree for the twist operation is a power of 2. When the definition field is F(2(40)−87)(4) , the proposed algorithm can generate a prime order elliptic curve within 5 seconds on PentiumIII (800MHz) with C language.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 71
終了ページ 81
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308036
JaLCDOI 10.18926/15365
フルテキストURL Mem_Fac_Eng_OU_30_1_1.pdf
著者 Dong Liu| 梶原 康博| 大崎 紘一| 宗澤 良臣|
抄録 A method for standardizing parts is proposed. This method aims to reduce the sort of parts for cutting the manufacturing cost and for improving specifications of parts. Two linear mathematical programming models are proposed for standardizing the parts. One model aims at cutting cost half without causing any degradation of mechanical specifications of parts. The other model aims at doubling mechanical specifications of parts below the acceptable manufacturing cost. These models are formulated in 0-1 integer programming forms. The integer programming model shows which part is common to other parts. An example is shown to demonstrate the use of the developed method.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1995-12-28
30巻
1号
開始ページ 1
終了ページ 7
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307491
JaLCDOI 10.18926/15592
フルテキストURL Mem_Sch_Eng_OU_2_127.pdf
著者 Misaki Takayoshi| Kato Osamu| Yamamoto Hideki|
抄録 Described in this paper is a method of automatic washing for salt contaminated insulators. An average value of leakage current through the surface of the pilot insulator in a duration is measured, for this is a function of the quantity of salt adhered and its moisture content. In each cycle, the program signals give one by one the instructions on a start and an end of the integration of leakage current, a detection of the integrated value, a stop of the washing device and a reset of the integrator. The integrator consists of RC circuit and the main detecting part consists of the thyristor whose firing gate voltage is used as a reference value. If the integrator output rises above the firing gate voltage, the pulse signals are made in the signal conversion part at the same time that the thyristor turns on, which are distributed to the pump motor or the electromagnetic valve. Then the insulators on hot-line are washed all together in the appointed duration. Finally, by the various experiments this method was proved to have enough accuracy and reliability in practical use. The conclusions are summarized as follows. (1) An average value of leakage current is justified to be the detecting variable. (2) The RC circuit used as the integrator is proved to be easy in maintenance. (3) Because of the fairly short duration of the detecting action, the integrator is kept in a sufficiently safe condition under expected environment.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1967-04-01
2巻
1号
開始ページ 127
終了ページ 132
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307133
JaLCDOI 10.18926/15480
フルテキストURL Mem_Fac_Eng_OU_25_1_1.pdf
著者 Gao Hong| 和田 力| 則次 俊郎|
抄録 How to reduce and simplify the calculation for image recognition is a very attractive and important issue in order to realize the real time control of a robot based on the image recognition results. This paper describes a method of extracting 2 - dimensional geometrical features of cubic objects based on the normal vector distributions from the visual information obtained with the laser range finder to reduce the calculation of the image recognition. In this research a laser beam is scanned in the horizontal plane to which the cubic objects stand vertically and the laser spot is detected with a TV camera every sampling time. These spots make an intermittent locus which includes some special lines corresponding to the cubic objects. To extract the features of the cubic objects, we utilize the normal vectors formed on the locus. If some normal vectors distribute in the same direction and the origin of the normal vectors are very close to their neighbor's, these normal vectors can be classified into the same class, -the straight line class. Because the normal vectors on the neighbor surfaces of the cubic objects are vertical to each other, we use this property to determine the pair of straight lines which belong to the cubic objects. Making the histogram based on the normal vectors with the same direction, we obtain the peaks which are supported by the points on the cubic object surfaces. Then, the points can be extracted from the set of points on the whole locus inversely according to the relations with the peaks and the features of the cubic object can be extracted by applying method of least square to these extracted points. The experiments proved the availability of the proposed processing algorithm.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1990-12-14
25巻
1号
開始ページ 1
終了ページ 13
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308010
JaLCDOI 10.18926/15624
フルテキストURL Mem_Sch_Eng_OU_3_157.pdf
著者 Misaki Takayoshi| Okamoto Takuji| Kato Osamu|
抄録 In the analog circuits for the systms governed by the dilfercntial equations with the coefficients which are a function of one or mOre of the dependent variables, the magnitudes of their circuit elements must be variable in accordance with the nature of the function. Such circuit elements can be realized by means of inserting or removing the additional elements with high speed switches in the analog circuits. Particularly, in the case of varying stepwise this method is effective. But as an analog circuit is regarded as a short-time or repetitive type analyzer, the above switches must be instantaneous operation. In this paper, first, it is made sure by the experiments that some of the transistor switches arc met this condition, and moreover arc very low closed resistance, very high open resistance and neglegible small voltage offsets. Next, the basic technique for the direct analog simulation usiug transistor switches is described about the simple example, i.e. the oscillatory system with varying cross-scctional surge tank. Finally, as its applications, the transient problems of these oscillatory systems arc solved by means of these analog circuits.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1968-09-01
3巻
1号
開始ページ 157
終了ページ 162
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307953
JaLCDOI 10.18926/19601
フルテキストURL Mem_Fac_Eng_OU_31_2_61.pdf
著者 Yamada Mitsuru| 大崎 紘一|
抄録 At present, the two dimensional CAD systems which are used to make drawings go around widely. But in order to use design data at the lower stream of production process, the replacement from the two dimensional CAD systems to the three dimensional CAD systems have started. Accordingly it is dimensional drawings for the three dimensional shapes. And it is also necessary to store them in the three dimensional CAD systems. And in the studying of the machine vision which is often used as "Eyes of robot" , it is being studied the method to recognize the three dimensional objects from the two dimensional image. This is the problem about data exchange, too. Therefore in this report, we propose the method to exchange the plural two dimensional elements of figure from image relations between elements were found from reference of the element coordinates. Next, the three dimensional shapes were reasoned from reference of the knowledge (for corner, etc) prepared beforehand. Then that data were exchanged to the three dimensional CAD data. We report one example about this method.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1997-03-28
31巻
2号
開始ページ 61
終了ページ 65
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002309050
JaLCDOI 10.18926/19680
フルテキストURL Mem_Fac_Eng_OU_33_2_85.pdf
著者 山田 充| 大崎 紘一|
抄録 We reason the circumstances around the three-dimensional vertex from the information about the intersection point in the two-dimensional image data inputted from a camera on the premise that we use this method as the eye ot the robot. In this method, we use the Vertex-Dictionary. We make the Vertex-Dictionary by calculation from CAD data of object figure (these data are already known) and the position data of the point of view. This dictionary includes the data of position and relations of connect surface etc. about a vertex. We get the data of three-dimensional vertex by comparison the data of two-dimensional intersection point in image data and Vertex-Dictionary. And we get the three-dimensional object by reasoning about the information of circumstances of all vertexes. Then we can recognize the three-dimensional object from image data. In this report, we explain the process to calculate the Vertex-Dictionary and some examples about this method.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1999-04-27
33巻
2号
開始ページ 85
終了ページ 89
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002309120
著者 Itano, Arao| Arakawa, Satiyo|
発行日 1932-01-19
出版物タイトル Berichte des Ohara Instituts für landwirtschaftliche Forschungen
5巻
2号
資料タイプ 紀要論文
JaLCDOI 10.18926/15622
フルテキストURL Mem_Sch_Eng_OU_3_143.pdf
著者 Himei Toyoji| Inoue Jyunichi| Fukumori Kooichi|
抄録 A modified type of the resonant turn-off d-c chopprr using an auxiliary SCR, compared with its conventional one, has no limitation about its starting and also operates more steadily. Presented in this paper, making a comparison between the modified type and the conventional one, are the circuit analysis and its efficiency measurement from the point of view of overall efficiency, that is, the ratio of the output to the input. Furthermore, some effects of the source impedance, counter emf load, etc. are discussed. As a result, it has been analytically clarified that this modified type is different from the conventional circuit only by one terminal connection of turn-off capacitor, but has the features of uncompounded circuit configuration, no limitation about its starting and more steady operation.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1968-09-01
3巻
1号
開始ページ 143
終了ページ 150
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307152
JaLCDOI 10.18926/1018
フルテキストURL 10_0089_0100.pdf
著者 石山 健一|
抄録 In a work concerning stability analysis, Burmeister, Dobell, and Kuga(1968) showed the properties of Solow type growth model with many capital goods. They suggested that the one-sector Solow model is stable not because it has only one capital good, but because it has particularly simple saving function. In the analysis, they proved the global stability of the multi-sector Solow model. The model is, however, unrealistic due to their neoclassical flamework in which full employment is permanetly kept. In this note, we allow for the existence of unemployment in their model. We substitute linear functions for Cobb-Douglas production functions. Also we introduce some elements of Goodwin's model (Goodwin(1965)), thus generalizing Sato's model in Sato(1985). The purpose of this paper is to analyze of the stability of a thus extended Goodwin model. We consider the relationship between the number of capital goods and the stability of the system. This paper is organized as follows. In section 2, we propose an extended Goodwin model and show the existence of a positive equilibrium. In section 3 concerning a neighbourhood of the equilibirium the property of three dimensional case is compared with that of two dimensional case. Section 4 is devoted to a couple of analyses by computer simulations. Some comments are given in the final section.
キーワード Multi-Sector Goodwin Model
出版物タイトル 岡山大学大学院文化科学研究科紀要
発行日 2000-11
10巻
1号
開始ページ 89
終了ページ 100
言語 Japanese
論文のバージョン publisher
NAID 120002306040
著者 Moritsugu, Masumi| Kawasaki, Toshio|
発行日 1979-05
出版物タイトル Berichte des Ohara Instituts für landwirtschaftliche Biologie, Okayama Universität
17巻
4号
資料タイプ 紀要論文
著者 Seo, Takuro| Yamaguchi, Nobuyuki|
発行日 1968
出版物タイトル Berichte des Ohara Instituts für landwirtschaftliche Biologie, Okayama Universität
14巻
3号
資料タイプ 紀要論文
JaLCDOI 10.18926/15690
フルテキストURL Mem_Sch_Eng_OU_10_2_55.pdf
著者 Nakata Takayoshi| Ishihara Yoshiyuki| Matsubara Kazunori| Nakano Masanori|
抄録 A new method have been developed based upon analogue-to-digital conversion techniques and memories. The method involves the scaling of operating frequency from "real" to "optimum" for the power loss measurement. The advantages of using this techniques are as follows: (1) extreme availability at lower frequency region, (2) high accuracy and high stability, (3) simple measuring procedure, (4) digital indication. This method can be measured the power losses over the frequency range 0.1Hz to 1kHz for magnetic circuit and d.c. to 1kHz in such a purely resistive circuit. We estimate the accuracy of this core loss measuring system within 1.0% over all these frequency range. Using this system, specific core losses of the various grades of silicon iron have been measured in the frequency range 0.1Hz to 200Hz.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1976-01-27
10巻
2号
開始ページ 55
終了ページ 61
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307969
著者 Nisikado, Yosikazu| Matsumoto, Hiroyoshi|
発行日 1929-08-28
出版物タイトル Berichte des Ohara Instituts für landwirtschaftliche Forschungen
4巻
2号
資料タイプ 紀要論文
著者 小泉 憲治|
発行日 1960
出版物タイトル 岡山大学農学部学術報告
16巻
1号
資料タイプ 紀要論文
著者 Itano, Arao|
発行日 1938-05-03
出版物タイトル Berichte des Ohara Instituts für landwirtschaftliche Forschungen
8巻
2号
資料タイプ 紀要論文
著者 Itano, A.| Tsuji, Y.| Hasegawa, T.| Moriya, T.|
発行日 1937-12-14
出版物タイトル Berichte des Ohara Instituts für landwirtschaftliche Forschungen
8巻
1号
資料タイプ 紀要論文
JaLCDOI 10.18926/15714
フルテキストURL Mem_Sch_Eng_OU_12_23.pdf
著者 Yamashita Yuhiko| Monobe Kazuo|
抄録 A new realistic, structural model is proposed for the glassy solid state of poly(ethylene terephthalate) (PET). The model is considered basing on crystallization behaviors from the glassy state of PET, and in particular including the evidence from the estimation of chain folding energy in this report. When PET is quenched from its melt into the glassy state, irregular folds with lower conformational energy remain in glassy structure and disturb the three dimensional arrangement of the chains connected with the folds. In conclusion, we suggested that the structure of glassy PET is not in amorphous state which is represented by the interpenetrating random coil model, but in frozen metastable state which can be approached from the chain folded structure of polymer crystals.
出版物タイトル Memoirs of the School of Engineering, Okayama University
発行日 1978-02-25
12巻
開始ページ 23
終了ページ 28
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307771