JaLCDOI 10.18926/15367
フルテキストURL Mem_Fac_Eng_OU_30_1_9.pdf
著者 Ding Ronggui| 大崎 紘一|
抄録 Decision Support Systems (DSS) have been taken as hopeful support tools for decision making for more than 20 years. There are a lot of literatures on DSS, but most of them are not so practical as the designers expected. This paper points out the crux of this situation and argues that the research on DSS should pay some more attention to the decision making activities before the model using stage. A method named "Problem Situation Decomposing Graph (PSDG)" is presented in this paper for helping the decision maker(DM) elicit the decision making problems. A PSDG is an acycle AND/OR logical directed graph, and which includes all the factors affecting the problem situation based on the DM's knowledge. The logical nodes and parameter determining methods in PSDG can reflect the DM's decision making style. This paper introduces some basic concepts of PSDG, discusses some of its characteristics, and proposes a logical adjacency matrix for PSDG representation and analysis.
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 9
終了ページ 17
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307826
JaLCDOI 10.18926/15372
フルテキストURL Mem_Fac_Eng_OU_30_1_25.pdf
著者 Sun Yonghao| 加川 幸雄|
抄録 Identification of unknown electric charges or sources distributed in space is made from the data observed over the field boundary using dual reciprocity boundary element models. The inhomogeneous term of the Poisson field can equivalently be expressed as the linear combination of the functions associated with the particular solutions to transform into Laplace equation. For the solution procedure, the variational formulation is employed, in which the regular boundary integral approach is incorporated to avoid the singularity. Numerical examples are presented to demonstrate the availability and the capability.
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 25
終了ページ 33
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307314
JaLCDOI 10.18926/15374
フルテキストURL Mem_Fac_Eng_OU_30_1_35.pdf
著者 Mahmood Zaheed| 加川 幸雄|
抄録 Divergence-free shape functions are proposed for the finite elements, with which inhomogeneously-loaded and arbitrarily-shaped waveguides are analysed. The method is based on vectorial finite element formulation employing edge elements. The shape functions used for the approximation of the fields are shown analytically to be divergence-free and as an evidence, the non-physical solutions that appeared in the longitudinal component finite element formulation have been shown to be absent. To show the validity of the elements, application is made for the analysis of rectangular waveguides loaded with dielectric slab and a waveguide with curved structure. The solutions obtained are compared with the analytical ones or the solutions reported elsewhere. The degree of accuracy has been found satisfactory.
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 35
終了ページ 46
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307293
JaLCDOI 10.18926/15381
フルテキストURL Mem_Fac_Eng_OU_30_1_75.pdf
著者 東辻 浩夫| 井上 嘉彦| 岸本 篤也| 東辻 千枝子| 奈良 重俊|
抄録 Molecular dynamics of the Yukawa system, the system of particles interacting via the Yukawa or the screened Coulomb potential, are formulated for various statistical ensembles and external conditions. The Yukawa potential smoothly interpolates the long-range Coulomb and the short-range interactions by adjusting a single parameter, the screening length. In order to reduce the effect of boundaries, the periodic boundary conditions are imposed and the deformations of the fundamental vectors of periodicity are taken into account. Ewald-type expressions for interaction energy, force, and kinematic pressure are given explicitly.
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 75
終了ページ 87
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307479
JaLCDOI 10.18926/15389
フルテキストURL Mem_Fac_Eng_OU_30_1_121.pdf
著者 Kuk Hun| 谷野 哲三| 田中 雅博|
抄録 In this paper we provide some theoretical results on stability and sensitivity analysis in convex vector optimization. Given a family of parametrized vector optimization problems, the perturbation maps are defined as the set-valued map which associates to each parameter value the set of minimal points (properly minimal points, weakly minimal points) of the perturbed feasible set with respect to an ordering convex cone. Sufficient conditions for the upper and lower semicontinuity of the perturbations map are obtained. We also provide quantitative properties of the perturbation maps under some convexity assumptions.
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 121
終了ページ 131
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307414
JaLCDOI 10.18926/15369
フルテキストURL Mem_Fac_Eng_OU_30_1_19.pdf
著者 中村 隆夫| 山本 尚武|
抄録 This paper describes a new measurement method and principle of detection of biodynamics using bioelectrical impedance method based on four-electrode technique with sinusoidal constant current. This method uses a human body itself as a part of the sensor. First, we show a bioelectrical impedance measuring device and the change of bioelectrical resistance is measured in human movement. Second, we proposes a principle of detection of biodynamics based on correspondence of magnitude, form and stability of movement to impedance waveform. Hence we can use this method for the judgement of sports skill using the impedance characteristics.
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 19
終了ページ 24
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307151
JaLCDOI 10.18926/15386
フルテキストURL Mem_Fac_Eng_OU_30_1_111.pdf
著者 Ye Ju| 田中 雅博| 谷野 哲三|
抄録 Mutation is one of the important operators in genetic algorithm. In traditional genetic algorithm, mutation is activated stochastically. In this way it is unknown and cannot be controlled for which individuals to be mutated. Therefore, it is unavoidable that some good individuals are destroyed by mutation and then the evolutionary efficiency of the genetic algorithm is dampened. Owing to this kind of destructivity of mutation, the operator of mutation has to be limited within a very small probability, and the potentiality of mutation is consequently limited. In this paper, we present an evolutionary chain-based mutation and a control strategy of reasonable competition, in which the heuristic information provided by the evaluation function is well utilized. This method avoids the blindness of stochastic mutation. The performance improved in this method is shown by two examples, a fuzzy modeling for the identification of a nonlinear function and a typical combinatorial optimization problem-the traveling salesman problem.
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 111
終了ページ 120
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307635
JaLCDOI 10.18926/15384
フルテキストURL Mem_Fac_Eng_OU_30_1_99.pdf
著者 Wang, Ming| 和田 修己| 古賀 隆治|
抄録 A cylindric mirror was used, in place of a parabolic mirror, to collimate the crescent blue laser beam radiated from the Cerenkov SHG in channel waveguide configuration. The cylindric mirror radius is requested to be twice the focal length of the parabolic mirror. The focusing effect of the cylindric mirror in collimation can be compensated by slightly lifting the mirror in its normal direction. Under the condition that the mirror was declined by 5.56° and lifted by 25 μm, we got the collimated beam with divergence angle less than 1.3 mrad. In the focusing experiment, the collimated beam was focused with spotsize of 1.8 μm. The details on the analysis and experiment are reported.
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 99
終了ページ 110
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307418
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 10.18926/15408
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 10.18926/15411
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 10.18926/15426
フルテキストURL Mem_Fac_Eng_OU_29_2_77.pdf
著者 都留 寛治| Nishiyama Chikako| 大槻 主税| 尾坂 明義|
抄録 Poly(methyl methacrylate) substrates were immersed in suspensions containing bioactive 50CaO・50SiO(2) (mol%) glass particles (45 μm in diameter) and a 6:4 (volume fraction) mixture of ethanol and THF, and an ultrasonic energy was applied to the system. A layer of glass particles was implanted and covered more than 50% of the substrate surface. Thin film X-ray diffraction patterns and FT-IR reflection spectra indicated deposition of apatite on the glass-implanted substrates after they were soaked for 12 h in a simulated body fluid similar in apatite-deposition ability to the human blood plasma. Flake-like apatite crystallites formed on the substrate soaked in SBF for 3 days.
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 77
終了ページ 81
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307332
JaLCDOI 10.18926/15428
フルテキストURL Mem_Fac_Eng_OU_29_2_83.pdf
著者 都留 寛治| Nishiyama Chikako| 大槻 主税| 尾坂 明義|
抄録 One of the CaO,SiO(2)-based bioactive glasses(5OCaO・ 5OSiO (2) in mol%) were soaked for various periods in a simulated body fluid(SBF) with or without containing alcohols such as methanol, ethanol, and 1-propanol. Effect of the alcohols was investigated on the apatite formation on the glass surface with thin-film X-ray diffraction, FT-IR reflection spectroscopy and scanning electron microscopy. Under the presence of alcohols up to 0.1mol/l in the SBF an apatite layer was formed on the glass, while it consisted of crystallites similar in morphology but larger in size than that found for the SBF without the alcohols. It was concluded that the alcohols little influenced the the apatite forming ability of the CaO,SiO(2)-based glasses.
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 83
終了ページ 88
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307301
JaLCDOI 10.18926/15415
フルテキストURL Mem_Fac_Eng_OU_29_2_29.pdf
著者 岡 久雄| 福田 敬|
抄録 In the stiffness evaluation from the skin surface, the body structure under the skin, like a bone and muscle, influences on the measurement results. The authors developed the measurement system of biomechanical impedance with applying a vibration of acoustic frequency onto the body surface. We measured the viscoelasticity of the silicone-gel model, which involves metal blocks, from the gel surface by using this system. The internal structure of model is estimated from the relation between the viscoelasticity and the distance from the gel surface to the internal block. Applying this method, the shape of ribs of the right chest are estimated. The shapes and viscoelasticity of silicone-gel tumor model, which has two different tumors, are also estimated.
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 29
終了ページ 37
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307199
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 10.18926/15417
フルテキストURL Mem_Fac_Eng_OU_29_2_39.pdf
著者 岡 久雄| 坂本 俊哉| Irie Takashi|
抄録 The body structures under the skin surface, such as bones and tendon, have an influence on the stiffness evaluation observed from the surface. In this case, the observed stiffness should be called an apparent stiffness. To obtain the biomechanical properties of skin itself, the influence of body structure should be removed. This study deals with the correction method of apparent viscoelasticity which calculated from apparent biomechanical impedance. This method is applied to the measured result of the forearm and the right chest to confirm its effectiveness.
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 39
終了ページ 47
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307527
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 10.18926/15422
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 10.18926/15430
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