検索結果 1995 件
| JaLCDOI | 10.18926/14087 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_41_1_73.pdf |
| 著者 | 金谷 健一| |
| 抄録 | A rigorous accuracy analysis is given to various techniques for estimating parameters of geometric models from noisy data for computer vision applications. First, it is pointed out that parameter estimation for vision applications is very different in nature from traditional statistical analysis and hence a different mathematical framework is necessary in such a domain. After general theories on estimation and accuracy are given, typical existing techniques are selected, and their accuracy is evaluated up to higher order terms. This leads to a “hyperaccurate” method that outperforms existing methods. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2007-01 |
| 巻 | 41巻 |
| 号 | 1号 |
| 開始ページ | 73 |
| 終了ページ | 92 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308410 |
| JaLCDOI | 10.18926/14084 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_41_1_52.pdf |
| 著者 | 稲葉 英男| Syahrul Husain| 堀部 明彦| 春木 直人| |
| 抄録 | The effects of heat and mass transfer parameters on the efficiency of fluidized bed drying have been studied to optimize the input and output conditions. The analysis was carried out using two different materials, wheat and corn. Energy and exergy models based on the first and second law of thermodynamic are developed. Furthermore, some unified non-dimensional experimental correlations for predicting the efficiency of fluidized bed drying process have been proposed. The effects of hydrodynamics and thermodynamics conditions such as the inlet air temperature, the initial moisture content and well known Fourier and Reynolds numbers on energy efficiency and exergy efficiency were analyzed using the developed model. A good agreement was achieved between the model predictions, non-dimensional correlations and the available experimental results. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2007-01 |
| 巻 | 41巻 |
| 号 | 1号 |
| 開始ページ | 52 |
| 終了ページ | 62 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308668 |
| JaLCDOI | 10.18926/14082 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_41_1_31.pdf |
| 著者 | 濱名 良平| 小西 正躬| 今井 純| |
| 抄録 | Various kind of productions are made in semiconductor factories, where it employs the production system with multiprocess and multiple Automated Guided Vehicles(AGVs) for transportation. It is difficult to optimize planning of production and transportation simultaneously because of the complicated flow of semifinished products. This paper describes the formulations of production scheduling and transportation routing, and algorithm for simultaneous optimization of plannings by using logic cuts. The entire problem is decomposed to the master problem and the sub problem. If it derives the infeasible solutions, new constraints are added to the master problem to eliminate the solution area including infeasible solutions. The results of about optimality and computation time by using CPLEX solver are shown compared with conventional decomposition method to check up effectivity of proposed method in small size problem, and about optimality and computaion time for large scale problem. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2007-01 |
| 巻 | 41巻 |
| 号 | 1号 |
| 開始ページ | 31 |
| 終了ページ | 43 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308108 |
| JaLCDOI | 10.18926/14080 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_41_1_11.pdf |
| 著者 | Nogami, Yasuyuki| Morikawa, Yoshitaka| |
| 抄録 | This paper proposes an algorithm for generating irreducible cubic trinomials in the form x(3) + ax + b, b ∈ F(p), where a is a certain fixed non-zero element in the prime field F(p). The proposed algorithm needs a certain irreducible cubic trinomial over F(p) to be previously given as a generator; however, the proposed algorithm can generate irreducible cubic polynomials one after another by changing a certain parameter in F(p). In this paper, we compare the calculation cost and the average computation time for generating an irreducible cubic polynomial, especially trinomial, among Hiramoto et al. irreducibility testing algorithm, Berlekamp-Massey minimal polynomial determining algorithm, and the proposed algorithm. From the experimental results, it is shown that the proposed algorithm is the fastest among the three algorithms for generating irreducible cubic trinomials. |
| キーワード | irreducible cubic polynomial minimal polynomial |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2007-01 |
| 巻 | 41巻 |
| 号 | 1号 |
| 開始ページ | 11 |
| 終了ページ | 19 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308381 |
| JaLCDOI | 10.18926/14079 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_41_1_1.pdf |
| 著者 | Nogami, Yasuyuki| Morikawa, Yoshitaka| |
| 抄録 | In this paper, we first show the number of x's such that x(2) +u, u ∈ F(*)(p) , becomes a quadratic residue in F(p), and then this number is proven to be equal to (p+1)/2 if −u is a quadratic residue in Fp, which is a necessary fact for the following. With respect to the irreducible cubic polynomials over Fp in the form of x(3)+ax+b, we give a classification based on the trace of an element in F(p3) and based on whether or not the coefficient of x, i.e. the parameter a, is a quadratic residue in Fp. According to this classification, we can know the minimal set of the irreducible cubic polynomials, from which all the irreducible cubic polynomials can be generated by using the following two variable transformations: x=x + i, x=j−1x, i, j ∈ Fp, j ≠ 0. Based on the classification and that necessary fact, we show the number of the irreducible cubic polynomials in the form of x(3)+ax+b, b ∈ F(p), where a is a certain fixed element in F(p). |
| キーワード | Irreducible cubic polynomial trace quadratic residue |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2007-01 |
| 巻 | 41巻 |
| 号 | 1号 |
| 開始ページ | 1 |
| 終了ページ | 10 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308562 |
| JaLCDOI | 10.18926/14065 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_42_91.pdf |
| 著者 | Ryohei, Hamana| 小西 正躬| 今井 純| |
| 抄録 | Various kind of productions are made in semiconductor fabrications, where it employs the production system with multiprocesses and multiple Automated Guided Vehicles(AGVs) for transportation. It is difficult to optimize planning of production and transportation simultaneously because of the complicated flow of semifinished products. This paper describes the formulations of production scheduling, transportation routing and sequence planning of material handling system, and algorithm for simultaneous optimization of plannings by using solution space reduction and simulated annealing method. In this paper, all production system is decomposed to the production scheduling problem, transportation routing problem by AGVs and sequence planning of material handling system with managing stockers and buffers. Production scheduling problem and transportation routing problem are solved by the optimization algorithm using the decomposition routing problem. Sequence planning of material handling robot problem is solved by the algorithm using simulated annealing method. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2008-01 |
| 巻 | 42巻 |
| 号 | 1号 |
| 開始ページ | 91 |
| 終了ページ | 103 |
| ISSN | 0475-0071 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002308279 |
| JaLCDOI | 10.18926/14064 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_42_79.pdf |
| 著者 | Notsu Tadafumi| 小西 正躬| 今井 純| |
| 抄録 | The operations of a reactor furnace such as a blast furnace still depend on the experiences and intuitions of skilled operators due to the complexity of internal furnace phenomena and high temperature. There is a great demand for stable operations under the circumstances of a decrease in the number of skilled operators and difficulty in technology inheritance. This paper aims to construct mathematical description for control of a reactor furnace. Further, the linear-quadratic-gaussian control system for a reactor furnace is proposed, which estimates inner furnace temperature distribution using measured data near furnace wall. Temperature distribution of a furnace is controlled based on the estimated inner temperature distribution changing of boundary conditions of a furnace. The practicability of the proposed control method was checked through numerical experiments. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2008-01 |
| 巻 | 42巻 |
| 号 | 1号 |
| 開始ページ | 79 |
| 終了ページ | 90 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308624 |
| JaLCDOI | 10.18926/14062 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_42_60.pdf |
| 著者 | Kikuchi, Junji| 小西 正躬| 今井 純| |
| 抄録 | In steel works, molten metals discharged from blast furnace are put into a pan for transportation called torpedo and transported to steel making factory by a locomotive. In molten metals transportation, it becomes issues to prevent temperature drop of molten metals for stable production of down stream plants to shorten transportation time. Therefore it is necessary to make an appropriate plan for molten metals transfer considering the production and the transportation simultaneously. In this paper, molten metals transfer planning method is proposed including production scheduling. That is, torpedo schedule, transfer request assignment and route plan of locomotives are optimized according to each objective. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2008-01 |
| 巻 | 42巻 |
| 号 | 1号 |
| 開始ページ | 60 |
| 終了ページ | 70 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308612 |
| JaLCDOI | 10.18926/14057 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_42_36.pdf |
| 著者 | Kato, Hidehiro| Nekado, Kenta| Nogami, Yasuyuki| Morikawa, Yoshitaka| |
| 抄録 | This paper proposes an exponentiation method with Frobenius mappings. Our method is closely related to so-called interleaving exponentiation. Different from the interleaving exponentiation methods, our method can carry out several exponentiations using same base at the same time. The efficiency to use Frobenius mappings for an exponentiation in extension field is well introduced by Avanzi and Mihailescu. This exponentiation method is based on so-called simultaneous exponentiation and uses many Frobenius mappings. Their method more decreased the number of multiplications; however, the number of Frobenius mappings inversely increased. Compared to their method , the number of multiplications needed for the proposed method becomes about 20% larger; however, that of Frobenius mappings becomes small enough. |
| キーワード | exponentiation Frobenius mapping extension field |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2008-01 |
| 巻 | 42巻 |
| 号 | 1号 |
| 開始ページ | 36 |
| 終了ページ | 43 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308105 |
| JaLCDOI | 10.18926/14056 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_42_18.pdf |
| 著者 | 金谷 健一| Yasuyuki Sugaya| |
| 抄録 | We classify and review existing algorithms for computing the fundamental matrix from point correspondences and propose new effective schemes: 7-parameter Levenberg-Marquardt (LM) search, EFNS, and EFNS-based bundle adjustment. Doing experimental comparison, we show that EFNS and the 7-parameter LM search exhibit the best performance and that additional bundle adjustment does not increase the accuracy to any noticeable degree. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2008-01 |
| 巻 | 42巻 |
| 号 | 1号 |
| 開始ページ | 18 |
| 終了ページ | 35 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308468 |
| JaLCDOI | 10.18926/14055 |
|---|---|
| フルテキストURL | Mem_Fac_Eng_OU_42_10.pdf |
| 著者 | 金谷 健一| |
| 抄録 | The author introduced the "geometric AIC" and the "geometric MDL" as model selection criteria for geometric fitting problems. These correspond to Akaike’s "AIC" and Rissanen's "BIC", respectively, well known in the statistical estimation framework. Another criterion well known is Schwarz’ "BIC", but its counterpart for geometric fitting has been unknown. This paper introduces the corresponding criterion, which we call the "geometric BIC", and shows that it is of the same form as the geometric MDL. We present the underlying logical reasoning of Bayesian estimation. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2008-01 |
| 巻 | 42巻 |
| 号 | 1号 |
| 開始ページ | 10 |
| 終了ページ | 17 |
| ISSN | 0475-0071 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002308447 |
| JaLCDOI | 10.18926/ESR/13922 |
|---|---|
| フルテキストURL | ESR_4_76.pdf |
| 著者 | 河原 昭| |
| 抄録 | Statistical calculation have been carried out on the volumes of the asymmetric unit of minerals. This treatment is related to the origin of the symmetry and periodicity of the crystals, and to the equilibrium conditions of these crystals. From the view point of the cohesion energy, if the crystals were grown under the condition of nearly perfect equilibrium states, than all the volumes of the asymmetric unit of each crystal structure will be approximately equal, and if the volume of the asymmetric units of a certain mineral is larger than the average value, this mineral is considered to be grown in a metastable condition. The calculation of the cell dimensions of minerals have been carried out by the use of deta from previous investigations. The statistical consideration of the volumes of the asymmetric unit of minerals is considered to be an appropriate criterion to relate the stability of minerals to their descriptive mineralogy. |
| キーワード | geneses of symmetry symmetry periododicity equilibrium |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 1997-09-20 |
| 巻 | 4巻 |
| 号 | 1号 |
| 開始ページ | 79 |
| 終了ページ | 96 |
| ISSN | 1340-7414 |
| 言語 | 英語 |
| 著作権者 | 岡山大学地球科学研究報告編集委員会 |
| 論文のバージョン | publisher |
| NAID | 120002310432 |
| 著者 | 白木 照夫| |
|---|---|
| 発行日 | 1993-08 |
| 出版物タイトル | 岡山医学会雑誌 |
| 巻 | 105巻 |
| 号 | 7-8号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | Hanno Volker Ackermann| |
|---|---|
| 発行日 | 2008-03-25 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| 著者 | クチヤフチイス アポストロス| |
|---|---|
| 発行日 | 2007-09-30 |
| 出版物タイトル | |
| 資料タイプ | 学位論文 |
| JaLCDOI | 10.18926/fest/12829 |
|---|---|
| フルテキストURL | 13_063_066.pdf |
| 著者 | Akudago Apambilla John| 西垣 誠| Chegbeleh Larry Pax| Alim Md. Abdul| 小松 満| 熊丸 耕志| |
| 抄録 | Filters are essential in the design of embankments/dams, drains and wells for water and oil supplies. As a result of these functions, filter use is increasing. In order to use the required filter, various empirical relations have been given based on mathematical and field experience. However, these guidelines have not worked to perfection considering the fact that clogging within the filter face is a serious challenge. A short review on filter design criteria is given in this script coupled with a numerical formulation to propose the design limits. |
| キーワード | filter particle clogging filter classification numerical model equation force of attraction |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2008-03 |
| 巻 | 13巻 |
| 号 | 1号 |
| 開始ページ | 63 |
| 終了ページ | 66 |
| ISSN | 1341-9099 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002304909 |
| JaLCDOI | 10.18926/bgeou/12822 |
|---|---|
| タイトル（別表記） | Formation of Mathematical Literacy and Progress of Teaching Study |
| フルテキストURL | 137_153_166.pdf |
| 著者 | 尾島 卓| |
| 抄録 | 本年 4月に実施された｢全国学力･学習状況調査｣は、｢学力｣問題の新たな局面をひらいた。この調査が教育に携わる地域・家庭・学校に対して広範に大きな影響を及ぼすことが予想される。本論は、新たな全国調査と国際的な｢学力調査｣との関係、現在の教育改革の流れの仲の位置づけの検討を通して、授業研究が向かうべき新たな方向性について、とりわけ小学校の算数科授業を中心に検討を行うものである。 |
| キーワード | 全国学力・学習状況調査 PISA 授業研究 |
| 出版物タイトル | 岡山大学教育学部研究集録 |
| 発行日 | 2008-02-25 |
| 巻 | 137巻 |
| 開始ページ | 153 |
| 終了ページ | 166 |
| ISSN | 0471-4008 |
| 言語 | 日本語 |
| 論文のバージョン | publisher |
| NAID | 120002304835 |
| JaLCDOI | 10.18926/fest/12819 |
|---|---|
| フルテキストURL | 13_023_033.pdf |
| 著者 | 銭花 知弘| 久兼 直人| 森本 智子| 石川 洋文| |
| 抄録 | We carried out simulations of various scenarios for bioterrorist attacks using smallpox occurring in a virtual area set up on the basis of the census of Okayama-city, Japan, which predict the effect of control strategies against bioterrorism and the loss scale. On simulating a smallpox epidemic, we followed the method of the Individual Based Model stochastically, which can treat the population in the virtual area as individuals. Individuals have personal information, behavior patterns, and interactions among social groups. We took into consideration the influence of residual immunity due to past vaccination. We considered Traced Vaccination (TV) and Mass Vaccination (MV) strategies against bioterrorism. We investigated the effect of TV and MV strategies on the suppression of smallpox epidemics. Consequently, the TV strategy was found to have higher effectiveness than the MV strategy. |
| キーワード | smallpox bioterrorism Individual Based Model Traced Vaccination Mass Vaccination |
| 出版物タイトル | 岡山大学環境理工学部研究報告 |
| 発行日 | 2008-03 |
| 巻 | 13巻 |
| 号 | 1号 |
| 開始ページ | 23 |
| 終了ページ | 33 |
| ISSN | 1341-9099 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| NAID | 120002304844 |
| JaLCDOI | 10.18926/OER/12382 |
|---|---|
| フルテキストURL | 39_4_151_176.pdf |
| 著者 | 黒田 耕嗣| 村井 浄信| |
| 抄録 | Using a Gibbs distribution developed in the theory of statistical physics and a long−range percolation theory, we present a new model of a stock price process for explaining the fat tail in the distribution of stock returns. We consider two types of traders, Group A and Group B : Group A traders analyze the past data on the stock market to determine their present trading positions. The way to determine their trading positions is not deterministic but obeys a Gibbs distribution with interactions between the past data and the present trading positions. On the other hand, Group B traders follow the advice reached through the long−range percolation system from the investment adviser. As the resulting stock price process, we derive a Lévy process. |
| キーワード | stock price process Lévy process Gibbs distribution long−range percolation fat tail |
| 出版物タイトル | 岡山大学経済学会雑誌 |
| 発行日 | 2008-03 |
| 巻 | 39巻 |
| 号 | 4号 |
| 開始ページ | 151 |
| 終了ページ | 176 |
| ISSN | 03863069 |
| 言語 | 英語 |
| 著作権者 | 岡山大学経済学会 |
| 論文のバージョン | publisher |
| NAID | 120002304827 |
| 著者 | 森澤 徹男| 加藤 鎌司| |
|---|---|
| 発行日 | 2008-02 |
| 出版物タイトル | 岡山大学農学部学術報告 |
| 巻 | 97巻 |
| 号 | 1号 |
| 資料タイプ | 紀要論文 |