JaLCDOI 10.18926/15404
フルテキストURL Mem_Fac_Eng_OU_27_2_41.pdf
著者 Prokop Jiri| Myojin Sho|
抄録 The fundamental objective of this paper is to aggregate and establish a set of practical principles, guidelines, and procedures to clarify and improve classification yard design and to enhance the efficiency of the design process. The paper primarily addresses theoretical and technical aspects of hump yard height and grade design, placement of the switches and the retarders. It attempts to compile and document yard design procedures, based on the Theory of Energy Head and Energy Loss. This procedures are applicable to the design of new yards, rehabilitation of the existing yards of different types and sizes including manually operated as well as highly automated classification yards.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1993-03-25
27巻
2号
開始ページ 41
終了ページ 58
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307241
JaLCDOI 10.18926/15405
フルテキストURL Mem_Fac_Eng_OU_30_2_39.pdf
著者 東辻 千枝子|
抄録 A simple model for oxygen ion conduction in perovskite compounds is proposed. The potential for an oxygen ion is calculated as the sum of the long range Coulomb potential and short range repulsive potential in a cubic lattice. The activation energy is estimated as the difference in the values of potential at the barrier and at the stable site. When appropriate conditions are satisfied, the activation energy has a minimum as a function of lattice constant in accordance with recent experiments.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1996-03-29
30巻
2号
開始ページ 39
終了ページ 43
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307769
JaLCDOI 10.18926/15406
フルテキストURL Mem_Fac_Eng_OU_27_2_59.pdf
著者 Prokop Jiri| Myojin Sho|
抄録 The paper presents methods for simulation and examination of the performance of a classification yard, including both manual and computer-aided methods. Presented methods are applicable to the simulation and examination of full range of yards of different types and sizes including manually operated as well as highly automated classification yards.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1993-03-25
27巻
2号
開始ページ 59
終了ページ 71
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307384
JaLCDOI 10.18926/15407
フルテキストURL Mem_Fac_Eng_OU_26_1_1.pdf
著者 榊原 精| Kanadani, Teruto|
抄録 Reversion of the age-hardened Al-15mass % Zn alloy, in which ellipsoidal GP zones were formed, was investigated by hardness test. Ellipsoidal zones were reverted more quickly near the surface and grain boundary than in the interior, as spherical zones did. The results confirm their role as sources for vacancies in reversion.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1991-11-30
26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 120002308003
JaLCDOI 10.18926/15408
フルテキストURL Mem_Fac_Eng_OU_29_2_1.pdf
著者 榊原 精| Nakagawa, Keiyu| Kanadani, Teruto|
抄録 Effect of addition of a small amount of copper to Al- 12mass % Zn binary alloy on the process of low temperature aging is studied by hardness test and transmission electron microscopy. Age hardening rate after quenching from various temperatures is slowed down by addition of 0.5mass % copper to the binary alloy. The hardness obtained after long aging, however, is increased a little by the addition of copper. The extent of soft surface layer formed by aging in the copper-added alloy is nearly equal to that obtained in the binary alloy.
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 1
終了ページ 4
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307763
JaLCDOI 10.18926/15409
フルテキストURL Mem_Fac_Eng_OU_29_2_5.pdf
著者 稲葉 英男| Tu Ping| 尾崎 公一|
抄録 Transient characteristics of the rectangular latent heat storage vessel packed with shape-stabilized phase change (solid-liquid) material (PCM) are investigated numerically by solving the governing equations of both the PCM and the heat transfer medium(water) simultaneously as a conjugate problem with the finite difference technique. It's found that the heat storage characteristics are greatly affected by the flow direction of the heat transfer medium since the natural and forced convection coexists in the heat storage vessel. That is, it is classified that the effectively thermal efficiency of the latent heat storage system is obtained by the downflow along vertical PCM for heat storage process and the upflow for heat release process. The effect of the inlet velocity of heat transfer medium(water) on transient heat characteristics of the latent heat storage system is also revealed in the present study.
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 5
終了ページ 12
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307377
JaLCDOI 10.18926/15410
フルテキストURL Mem_Fac_Eng_OU_26_1_9.pdf
著者 Uno, Yoshiyuki| Nakajima, Toshikatsu| Okada Minoru|
抄録 Practical utilization of ram type electrical discharge machining in uninflammable fluid has been expected in place of inflammable kerosine type fluid for unmanned operation in a workshop. The electrical discharge machining performance in deionized water is experimentally investigated on the basis of the analysis of the crater generated by a single pulse discharge. The experimental analysis makes it clear that the electrical discharge machining performance in deionized water is greatly affected by the electrode polarity. The metal removal rate in the normal polarity machining is higher than that in reverse polarity machining, while the electrode wear rate in the normal polarity machining is greater than that in reverse polarity machining. Therefore the electrode polarity should be properly selected according to the purpose of machining.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1991-11-30
26巻
1号
開始ページ 9
終了ページ 20
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307319
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 10.18926/15412
フルテキストURL Mem_Fac_Eng_OU_26_1_21.pdf
著者 野津 滋| 稲葉 英男|
抄録 A numerical study is performed for the facilitated diffusion of carbon-dioxide in an ultrapure water film flowing downward along a vertical surface. The model adopted for the present work includes the effects of the reaction rate for the hydration of CO(2)in a liquid. Comparison of the total concentration of CO(2) for different film thickness indicates that the effects of the hydration is more remarkable for the thinner liquid film.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1991-11-30
26巻
1号
開始ページ 21
終了ページ 26
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307958
JaLCDOI 10.18926/15413
フルテキストURL Mem_Fac_Eng_OU_29_2_23.pdf
著者 梶原 康博| 大崎 紘一| Dong Rui|
抄録 A method for reducing the variety of parts is proposed. The variety of parts in a product and the variety of parts among products are evaluated in consideration of some factors that influence the production cost. Rules are formulated for selecting parts which should be eliminated or whose designs should be changed to reduce these varieties. An expert system is developed based on this method for reducing the variety of parts.
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 23
終了ページ 27
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307257
JaLCDOI 10.18926/15419
フルテキストURL Mem_Fac_Eng_OU_29_2_49.pdf
著者 Ahmed, Anis| Taniguchi, Shinji| 和田 修己| Wang, Ming| 古賀 隆治|
抄録 For weakly guiding dielectric waveguides, the eigenmode field distributions are calculated numerically with a simple algorithm. In this numerical method, the transverse sampling space can be chosen arbitrarily, and hence a narrow waveguide can be analyzed. The field satisfying scalar wave equation is expressed by the discrete Fourier transform and the mode eigenvalues and eigenfunctions are calculated by solving an eigenvalue equation numerically. The validity of this method is checked for 2-D waveguides having step and parabolic or square index distributions. It is found that for the well guided TE modes of the slab waveguide, the accuracy of this method is remarkably good, but some discrepancies are found if the mode is near cut off. In the problems where the normalized guide index b is small, caution should be taken in applying the results of this numerical method.
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 49
終了ページ 55
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307858
JaLCDOI 10.18926/15420
フルテキストURL Mem_Fac_Eng_OU_26_1_61.pdf
著者 河原 長美| Danno Hideki| Kunimatsu Takao|
抄録 Lake Biwa is the largest lake in Japan, and one of the most important fresh water resources. The Hino River is the fourth largest river among the rivers which flow into Lake Biwa. The eutrophication of the lake has been warned since the 1960s. In order to improve the water quality of the lake, to decrease the loads through rivers is inevitable. Therefore, it is needed to predict the effects of measures to control pollutant loads and the influence of development in the basin on the loads from rivers before developing the basin and taking measures. This paper deals mainly with the model of water quality management for the Hino River and the effects of the development in the basin on the water quality. The model was formulated considering loads from forests, rice paddy fields, households, housing land, industrial factories. Using this model, a calculation system by a microcomputer was developed and the influence of urbanization of the basin was discussed.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1991-11-30
26巻
1号
開始ページ 61
終了ページ 73
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307182
JaLCDOI 10.18926/15421
フルテキストURL Mem_Fac_Eng_OU_26_1_75.pdf
著者 Myojin Sho| Noguchi Hisahumi| Yamada Masahito|
抄録 Four radials-single ring urban expressway network is priced and, simultaneously, optimized in its spatial formation under the constraint that a balance must be kept of revenue and expenditure. The model consists of three sub-models: road system, car trip generation-attraction and traffic diversion. Network performance is assessed on two criteria; trip number criterion on which the aggregate number of car trips diverted onto expressway is maximized and travel hour criterion on which the travel hours of car trips integrated over the road system; surface and expressway, is minimized. Optimization is tried by numerical calculation for some sets of parameters in the model. The results are summarized as follows; (1) simultaneous optimization of price and spatial formation of the expressway network is possible on each of criteria, (2) trip number criterion produces lower pricing and smaller network while travel hour criterion does higher pricing and larger network, (3) optimum solution lies in a delicate relation of price and spatial network formation that comes from the balance constraint.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1991-11-30
26巻
1号
開始ページ 75
終了ページ 94
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307318
JaLCDOI 10.18926/15422
フルテキストURL Mem_Fac_Eng_OU_29_2_57.pdf
著者 東辻 浩夫|
抄録 As plasmas with extremely reduced dimensionality, properties of one-dimensional classical plasmas are analyzed in the domain of strong coupling and static and dynamic structure factors and the plasmon dispersion relation are obtained. These plasmas may be realized in Penning traps with sufficiently strong confinement and also in semiconductor quantum wires under appropriate conditions.
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 57
終了ページ 65
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307838
JaLCDOI 10.18926/15423
フルテキストURL Mem_Fac_Eng_OU_26_1_95.pdf
著者 川上 浩司| 小西 忠孝|
抄録 This paper describes a method to construct IDEA BANK automatically. IDEA BANK is the data base of the "function-structure module" which is utilized in systematic conceptual design from Value Engineering perspectives. The method based on the Machine Learning EBL technique was evaluated and implemented for the IDEA BANK using SUN workstation. The practical implementation of the IDEA BANK acquisition was discussed after elucidating the problem and solution of the EBL technique in engineering design. In the IDEA BANK system, the structural features of an existing article are analyzed by hierarchically organized domain specific knowledge to yield a systematic explanation of how they function and attain their design goals. The explanation resulted in a generalized version of the Functional Diagram used in Value Engineering from which "function-structure module" can be extracted systematically.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1991-11-30
26巻
1号
開始ページ 95
終了ページ 108
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307756
JaLCDOI 10.18926/15424
フルテキストURL Mem_Fac_Eng_OU_29_2_67.pdf
著者 東辻 千枝子| Matsubara Takeo| Obuchi Masumi|
抄録 The π-electron band of C(60) molecule has been obtained by the tight binding approximation. Application of molecular orbital wave functions derived on the basis of the optimized bond orbital model gives, with simpler calculations, the results in satisfactory agreement with those of previous theoretical analyses.
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 67
終了ページ 76
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307408
JaLCDOI 10.18926/15425
フルテキストURL Mem_Fac_Eng_OU_26_2_1.pdf
著者 稲葉 英男| 大竹 秀雄| 野津 滋|
抄録 Radiative characteristics of the frost layer melted by radiative heat are experimentally examined. A frost layer is heated from above by the radiative heat from a halogen lamp set. Thermal radiation of the lamp has the wavelength spectrum characteristics similar to those of the solar radiation. The effect of the environmental temperature upon the frost melting process is clarified in experiments. The optical characteristics of reflectivity, absorptivity and transmissivity of the frost layer during the melting of the frost layer are measured using special measuring instruments.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1992-03-28
26巻
2号
開始ページ 1
終了ページ 16
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307428
JaLCDOI 10.18926/15427
フルテキストURL Mem_Fac_Eng_OU_26_2_17.pdf
著者 Feng Yibu| 稲葉 英男| 野津 滋|
抄録 Heat transfer measurements were conducted during freezing of quiescent water in a horizontal cylinder. A horizontal cylinder with inner diameter of 61.1 mm is cooled by air in a constant low temperature room and time variations of the radial distribution of fluid temperature were observed. Experimental results for the velocity of the phase change interface, the time taken for complete freezing and apparent freezing heat transfer coefficient were compared with the simple theoretical model based on the quasisteady assumption.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1992-03-28
26巻
2号
開始ページ 17
終了ページ 24
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307382
JaLCDOI 10.18926/15429
フルテキストURL Mem_Fac_Eng_OU_26_2_25.pdf
著者 松田 正明| 大崎 紘一|
抄録 The eye movement has been studied widely, because it gives various information about the characteristics of visual work. Almost all of those studies have concentrated on the distribution of the visual points, the direction and width of the saccadic movement and the fixation time of the measures. However there are few measures to evaluate the relationship between the visual objects and eye movement. Recently, the personal computer become portable and this makes it possible to analyze the many data and to show the results graphically on the experimental field. In this study, we propose a series of methods to evaluate how a subject looks at a visual field using the queue theory, and how often man looks at the central part of the visual field using the statistical two-dimensional ellipse. We developed the Pascal program on an personal computer(NEC PC9800). This program has 3 functions. One is the measurement of eye movement, the second is the calculation of the proposed measures and the third is the display of the results of these calculations.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1992-03-28
26巻
2号
開始ページ 25
終了ページ 41
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308015
JaLCDOI 10.18926/15430
フルテキストURL Mem_Fac_Eng_OU_29_2_89.pdf
著者 Sekoguchi, Kenji| Miyazaki, Shigeji|
抄録 The present paper deals with a new perfomance measure, the actual mean flow time, defined as a mean of the elapsed time of each job counted from the start time on a schedule to the corresponding due date. For the one machine backward scheduling model with a common due date and independent setup times, LPT schedule is shown as the optimal solution for the proposed measure. An optimal algorithm is presented for the case with dependent setup times on the basis of the algorithm by Arcelus and Chandra for a n / 1 / F forward scheduling problem. The proposed algorithm is coded in C-language and a computational experience is reported through a 16-bit computer.
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 89
終了ページ 94
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307729