| JaLCDOI | 10.18926/19603 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_31_2_67.pdf |
| 著者 | Li Zhenzi| 大崎 紘一| 梶原 康博| |
| 抄録 | In this paper, we propose the price determination method using the parameter of the price elasticity that shows the relation between price and demand. Firstly, the state of the price elasticity is examined under the condition that the relation between price and demand are assumed by the inverse proportional function, the linear function and the quadratic function. Secondly, the profit is estimated for each product by break even point analysis. And the price is determined under the condition that the relation between the demand and price is shown by one of three demand-pridce functions above mentioned. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1997-03-28 |
| 巻 | 31巻 |
| 号 | 2号 |
| 開始ページ | 67 |
| 終了ページ | 72 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002309056 |
| 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 |
| 巻 | 30巻 |
| 号 | 1号 |
| 開始ページ | 19 |
| 終了ページ | 24 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307151 |
| JaLCDOI | 10.18926/15391 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_27_1_33.pdf |
| 著者 | 島田 行恭| 鈴木 和彦| 佐山 隼敏| |
| 抄録 | Neural nets have recently become the focus of much attention, largely because of their wide range of complex and nonlinear problems. This paper presents a new integrated approach using neural networks for diagnosing process failures. The fault propagation in process is modeled by causal relationships from the fault tree and its minimal cut sets. The measurement patterns required for training and testing the neural network were obtained from fault propagation model. The network is able to diagnose even in the presence of malfunction of certain sensors. We demonstrate via a nitric acid cooler process how the neural network can learn and successfully diagnose the faults. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1992-11-25 |
| 巻 | 27巻 |
| 号 | 1号 |
| 開始ページ | 33 |
| 終了ページ | 44 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307902 |
| JaLCDOI | 10.18926/15482 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_24_1_93.pdf |
| 著者 | 東辻 浩夫| 畑谷 光輝| |
| 抄録 | Propagation of charged carriers in semiconductor superlattices is analyzed on the basis of the effective mass approximation with appropriate boundary conditions at heterojunctions taken into account. Applying the finite element method, clarified are the effects of details of the potential profile, such as linear and smooth gradings and random fluctuations, on characteristics of superlattices which are expected to work as collector barriers and energy filters in electronic devices. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1989-11-29 |
| 巻 | 24巻 |
| 号 | 1号 |
| 開始ページ | 93 |
| 終了ページ | 105 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307513 |
| JaLCDOI | 10.18926/46972 |
|---|---|
| フルテキストURL | mfe_37_1_051_060.pdf |
| 著者 | Namba, Akihiro| Toyota, Yoshitaka| Wada, Osami| Koga, Ryuji| |
| 抄録 | This paper presents pulse timing control method to reduce electromagnetic emission from multiple signal interconnections. Pulse timing control gives intentional skew between signals. Higher order harmonics are canceled because of the difference of the phase between the signals. Using this property, pulse timing control can reduce the EMI in wide frequency range. In this paper, we show that radiated electromagnetic field from multiple signal lines reduces its intensity to the same level of the field from one line by using pulse timing control. The result of measurement shows that EMI from four differential transmission lines can be reduced more than 9 dB in the 200 MHz to 800 MHz frequency range. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2002-11 |
| 巻 | 37巻 |
| 号 | 1号 |
| 開始ページ | 51 |
| 終了ページ | 60 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 80015683518 |
| JaLCDOI | 10.18926/15492 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_25_1_59.pdf |
| 著者 | 河野 伊一郎| 西垣 誠| Okada Junji| |
| 抄録 | In this paper, we propose a method to determine the coefficients of permeability of the unconfined aquifer consisted of two different permeability layers. With mixing the conventional pumping test and falling head permeability test, the coefficients of permeabilitiy k(1) and k(2) were obtained. The validity of the proposed method is investigated by using the numerical simulation. As the results, it becomes apparent that the proposed method is applicable to real hydarulic problems. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1990-12-14 |
| 巻 | 25巻 |
| 号 | 1号 |
| 開始ページ | 59 |
| 終了ページ | 69 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307472 |
| JaLCDOI | 10.18926/14098 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_40_1_16.pdf |
| 著者 | 阿部 快洋| 小西 正躬| 西 竜志| 今井 純| |
| 抄録 | In this study, auto tuning of PID control gains in hot strip looper controller is made based on RNN model. Neuro emulator is employed to model the characteristics of looper dynamics. Combining neuro emulator and RNN model, auto tuning system of PID control gains is constructed. As the inputs to RNN, plural evaluation functions which reflect individual preference of human experts. Further, Self learning mechamism is embeded to RNN model which enables adaptation to the change in rolling chracteristics. Through numerical experiments, the effect of the proposed method is ascertained. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2006-01 |
| 巻 | 40巻 |
| 号 | 1号 |
| 開始ページ | 16 |
| 終了ページ | 22 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308615 |
| 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 |
| 巻 | 26巻 |
| 号 | 2号 |
| 開始ページ | 1 |
| 終了ページ | 16 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307428 |
| JaLCDOI | 10.18926/19654 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_33_2_9.pdf |
| 著者 | 山本 恭二| |
| 抄録 | The molecular dynamics study is applied for interaction of the gas molecule with the solid wall to analyse the flow of a rarefied gas between two wall. The wall consisting of Pt molecules is considered to be in a state of physical adsorbates. Two problems are considered : one is the flow problem and the other is the temperature problem. It is found that the tangential momentum accommodation coefficient is about 0.8 when the relative speed ratio of the two walls is unity, while it decreases with increasing Knudsen number when the relative wall speed ratio is 5.0. It shown that the temperature accommodation coefficient is about 0.85 at 300K wall, 0.75 at 450K wall, and 0.69 at 600K wall. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1999-04-27 |
| 巻 | 33巻 |
| 号 | 2号 |
| 開始ページ | 9 |
| 終了ページ | 17 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002309121 |
| JaLCDOI | 10.18926/19612 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_33_1_39.pdf |
| 著者 | 宗澤 良臣| 大崎 紘一| 梶原 康博| |
| 抄録 | In this paper, we propose a recognition index to evaluate the complexity of discrimination among parts and units. The parts and units are classified into some groups (the number of groups is shown as n) by one characteristic, such as color, shape, size and so on. The recognition index of each is denoted as log(2) (n+1) by the information quantity formula. The recognition diagram shows the classfication of parts and units into only one part and unit by the structure of a characteristic. Further we propose the line balancing method for assembly line based on the working time and recognition index. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1998-11-30 |
| 巻 | 33巻 |
| 号 | 1号 |
| 開始ページ | 39 |
| 終了ページ | 45 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002309042 |
| JaLCDOI | 10.18926/15377 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_30_1_47.pdf |
| 著者 | 加川 幸雄| Sun Yonghao| Mahmood Zaheed| |
| 抄録 | Regular boundary element method is employed for the variational formulation of Helmholtz equation that governs the waveguiding problems. Like in the Charge simulation method, in this method, the source points associated with the fundamental solutions are allocated outside the domain so that the singular integrals which occur in the standard boundary element procedure can be avoided. First, the formulation is developed for the two-dimensional scalar Helmholtz problem solving for the axial components of either electric or magnetic fields. The application of the formulation is shown for simple hollow rectangular waveguide and dielectric-slab-loaded rectangular waveguide. Then the formulation is extended for the analysis of dielectric waveguides of open type incorporating axial components of both electric and magnetic fields, for the solution of the propagating modes which are generally of hybrid types. To show the validity and quality of the formulation, it is applied to a circular step-index optical waveguide and a dielectric rectangular waveguide. Very close agreements have been found when the solutions are compared with the ones obtained by different methods. One distinct merit of the extended formulation is that it has been fixed to suppress the spurious solutions which are encountered while solved by the conventional boundary element method. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1995-12-28 |
| 巻 | 30巻 |
| 号 | 1号 |
| 開始ページ | 47 |
| 終了ページ | 62 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307187 |
| JaLCDOI | 10.18926/47025 |
|---|---|
| フルテキストURL | mfe_36_2_051_060.pdf |
| 著者 | Hikida, Masaki| Magari, Masaki| Nakayama, Yasunori| Kanayama, Naoki| Ohmori, Hitoshi| |
| 抄録 | A population of peripheral B cells have been shown to express recombination activating gene products, RAG-1 and RAG-2, which are considered to be involved in revising the B cell antigen receptor (BCR) in the periphery. BCR engagement has been reported to turn off RAG expression in peripheral B cells, whereas the same treatment has an opposite effect in immature B cells in the bone marrow. In contrast to receptor editing that is involved in the removal of autoreactivity in immature B cells, it has been shown that secondary V(D)J rearrangement in peripheral B cells, termed receptor revision, contributes to affinity maturation of antibodies. Here, we show that RAG-2 expression in murine splenic B cells was abrogated by the coligation of BCR with complement receptors (CD21/CD35) much more efficiently than by the engagement of BCR alone. On the other hand, the same coligation augmented proliferation of anti-CD40-stimulated B cells. Consistent with these observations, RAG-2 expression was lower in the draining lymph nodes of the quasi-monoclonal mice when they were immunized with a high-affinity antigen than with a low-affinity one. These findings suggest a crucial role for CD21/CD35 in directing the conservation or the revision of BCRs in peripheral B cells. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2002-03 |
| 巻 | 36巻 |
| 号 | 2号 |
| 開始ページ | 51 |
| 終了ページ | 60 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 80015582223 |
| JaLCDOI | 10.18926/49321 |
|---|---|
| フルテキストURL | mfe_047_019_024.pdf |
| 著者 | Nogami, Yasuyuki| Sumo, Taichi| |
| 抄録 | Recent efficient pairings such as Ate pairing use two efficient rational point subgroups such that π(P) = P and π(Q) = [p]Q, where π, p, P, and Q are the Frobenius map for rational point, the characteristic of definition field, and torsion points for pairing, respectively. This relation accelerates not only pairing but also pairing–related operations such as scalar multiplications. It holds in the case that the embedding degree k divides r − 1, where r is the order of torsion rational points. Thus, such a case has been well studied. Alternatively, this paper focuses on the case that the degree divides r + 1 but does not divide r − 1. Then, this paper shows a multiplicative representation for r–torsion points based on the fact that the characteristic polynomial f(π) becomes irreducible over Fr for which π also plays a role of variable. |
| キーワード | pairing–friendly curve torsion point group structure rank |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2013-01 |
| 巻 | 47巻 |
| 開始ページ | 19 |
| 終了ページ | 24 |
| ISSN | 1349-6115 |
| 言語 | 英語 |
| 著作権者 | Copyright © by the authors |
| 論文のバージョン | publisher |
| NAID | 120005232373 |
| JaLCDOI | 10.18926/19606 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_33_1_5.pdf |
| 著者 | 阿部 武治| Namikoshi Ryuji| Nagayama Noriyuki| Takano Yasuju| |
| 抄録 | The influence of the slip between the inclusion and the matrix during the plastic deformation of inhomogeneous material with elliptic inclusions is investigated. The material is assumed to be rigid-plastic. The boundary slip region is modeled by assuming lower yield stress for the thin boundary region than those of the inclusion and the matrix. The rigid-plastic finite element method is used for the numerical calculation under the plane strain condition. The effects of the aspect ratio of the inclusion, the yield stress of the boundary region, and the volume fraction of the inclusion on the deformation mode are studied. The patterns of the strain concentration and the averaged flow stress of the inhomogeneous material are also discussed. The results may be helpful for understanding creep or superplastic deformation of metals with inclusions. |
| キーワード | Plasticity Composite Material Sliding Inclusions Rigid-Plastic Deformation Finite Element Method |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1998-11-30 |
| 巻 | 33巻 |
| 号 | 1号 |
| 開始ページ | 5 |
| 終了ページ | 17 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002309204 |
| JaLCDOI | 10.18926/46970 |
|---|---|
| フルテキストURL | mfe_37_1_025_032.pdf |
| 著者 | Kanazawa, Yasushi| Kanatani, Kenichi| |
| 抄録 | We present a new method for detecting point matches between two images without using any combinatorial search. Our strategy is to impose various local and non-local constraints as "soft" constraints by introducing their "confidence" measures via "mean-field approximations". The computation is a cascade of evaluating the confidence values and sorting according to them. In the end, we impose the "hard" epipolar constraint by RANSAC. We also introduce a model selection procedure to test if the image mapping can be regarded as a homography. We demonstrate the effectiveness of our method by real image examples. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2002-11 |
| 巻 | 37巻 |
| 号 | 1号 |
| 開始ページ | 25 |
| 終了ページ | 32 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 80015664456 |
| JaLCDOI | 10.18926/15352 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_35_35.pdf |
| 著者 | 島村 薫| 内田 哲也| 井上 智博| |
| 抄録 | Rigid polymer, poly(p-phenylene benzobisthiazole), formed lamellar crystals where the molecular chains were oriented perpendicular to the lamellae. It was supposed that, because of wide distribution in the chain length, the lamellar surface bristled with the chain cilia among which many voids were included. Crystallographically, this region afforded us a transitional structure from full to deficient packings of chains. The structure was analyzed using the scanning probe microscope. In the course the method for imaging one molecular chain end was developed. From the images it was concluded that an isolated long cilius did not move so violently at room temperature. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2001-03-27 |
| 巻 | 35巻 |
| 号 | 1-2号 |
| 開始ページ | 35 |
| 終了ページ | 40 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307784 |
| JaLCDOI | 10.18926/15445 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_26_2_139.pdf |
| 著者 | 廣瀬 壮一| |
| 抄録 | Scattering problems by a penny-shaped crack are solved using a time-domain boundary integral equation method, The crack is located in an infinite homogeneous, isotropic, linearly elastic solid, and is subjected to an oblique incident wave of either P-, SV-, or SH-wave, The hypersingular integral equation is solved to obtain near-field solutions as well as scattered far-fields. The accuracy of the present method is confirmed by comparing the near-field solutions for different arrangement of elements, Scattered far-fields are calculated for various incident waves, and their usefulness in quantitative non-destructive evaluation is discussed. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1992-03-28 |
| 巻 | 26巻 |
| 号 | 2号 |
| 開始ページ | 139 |
| 終了ページ | 150 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307492 |
| JaLCDOI | 10.18926/19584 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_29_1_1.pdf |
| 著者 | Uno, Yoshiyuki| Kubota, Shin-ichiro| Yokomizo, Seiichi| Ogata, Kojiro| Tada, Nobuhiko| |
| 抄録 | Scribing of copper coated alumina ceramic board with Q-switched YAG laser used for the maskless direct patterning of circuit board is experimentally investigated, which leads to efficient production of trial circuit board. Better dividing of alumina circuit board 655μm in thickness can be attained by the scribing of about 100μm depth. Higher repetition frequency of laser irradiation leads to smaller notch angle and lower breaking load. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1994-11-30 |
| 巻 | 29巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 6 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002309083 |
| JaLCDOI | 10.18926/15488 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_25_1_37.pdf |
| 著者 | Bouzidi, Moncef| 古賀 隆治| 和田 修己| 香川 直己| Hai, Xu| 小坂 恵| Sano, Hiroya| |
| 抄録 | Is proposed a tunable diode laser absorption spectrometer system which employs a pulsed current to drive the diode laser still implementing a second-harmonic detection methods enhancing a signal to noise up to 104 times that the case without it. This system affords the lead-salt diode laser a higher operating temperature which allows a more compact deep cooling system. A principle is based on employing a gated integrator between the preamplifier and the lock-in amplifier. Investigations are made on the optimum selection of the gating aperture time interval as determined by response time of the infrared detector and the pulse width of the laser driving current. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 1990-12-14 |
| 巻 | 25巻 |
| 号 | 1号 |
| 開始ページ | 37 |
| 終了ページ | 50 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002307549 |
| JaLCDOI | 10.18926/46977 |
|---|---|
| フルテキストURL | mfe_37_2_013_027.pdf |
| 著者 | Shibuta, Taizo| Konishi, Masami| Imai, Jun| Nishi, Tatsushi| |
| 抄録 | Nowadays, various kind of reactor furnaces are widely used for the production in industry. The raw materials charged into the furnace generate reaction heat produced by blowing gas. Generally speaking, the reaction heat generated in the furnace is remarkably high. Therefore the occurrence of an inappropriate temperature distribution in the furnace may make damege or serious accident of the furnace. This is the motivation of furnace control. The author is considering the application of studied results to the furnace control of Blast Furnace in steel industry. To the propose, the approximated and simplified Macro Model of the Blast Furnace is constructed which has the function of representation of qualitative characteristics of the furnace in dynamical sense. The furnace temperature, distribution greatly effects both on the producting and the product quality of the furnace. Needless to say, stable furnace operation is indispensable for the economical prosperity of the industry. In this paper, macro simulation of the furnace is developed to support the analysis and design of the furnace control. Using the simulator, the stability and the control characteristics for inner furnace temperature distribtion are analised quantitatively. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2003-03 |
| 巻 | 37巻 |
| 号 | 2号 |
| 開始ページ | 13 |
| 終了ページ | 27 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 80015999991 |