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 | English |

論文のバージョン | publisher |

NAID | 120002308612 |

JaLCDOI | 10.18926/14063 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_42_71.pdf |

著者 | Kawase, Koichi| 小西 正躬| 今井 純| |

抄録 | In this research, Fuzzy control theory is applied to the inventory control of the supply chain between multiple companies. The proposed control method deals with the amount of inventories expressing supply chain between multiple companies. Referring past demand and tardiness, inventory amounts of raw materials are determined by Fuzzy inference. The method that an appropriate inventory control becomes possible optimizing fuzzy control gain by using SA method for Fuzzy control. The variation of uncertain demand is given to the proposal method. Furthermore, the method of forecasting demand and the effectiveness of fuzzy control method are confirmed by numerical experiments. As the results, the proposal method suppressed increase in an unnecessary cost when demand varies. |

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 | 71 |

終了ページ | 78 |

ISSN | 0475-0071 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308296 |

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 | Japanese |

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 | English |

論文のバージョン | publisher |

NAID | 120002308624 |

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 | English |

論文のバージョン | publisher |

NAID | 120002308105 |

JaLCDOI | 10.18926/14071 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_42_110.pdf |

著者 | Nogami, Yasuyuki| Morikawa, Yoshitaka| |

抄録 | This paper shows a method for checking the parity of (#Jc − 1)/2 without calculating the order #Jc, where #Jc is the order of genus 2 or 3 hyperelliptic curve. |

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 | 110 |

終了ページ | 114 |

ISSN | 0475-0071 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308489 |

JaLCDOI | 10.18926/14061 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_42_56.pdf |

著者 | Miyake Takashi| 東辻 千枝子| Nakanishi Kenta| 鶴田 健二| 東辻 浩夫| |

抄録 | We analyze the ground state of the two-dimensional quantum system of electrons confined in a parabolic potential with the system size around 100. We map the system onto a classical system on the basis of the classical-map hypernetted-chain (CHNC) method which has been proven to work in the integral-equation-based analyses of uniform unbounded systems and then apply classical numerical simulations. We find that the confined system undergoes the transition to the spin polarized state with the decrease of the average density and the corresponding critical value is as low as rs ∼ 0.3 in terms of the usual rs parameter estimated for the average density. As the ground state for given value of the rs parameter, our data give the critical value for the transition around 20 which is consistent with the known possibility. The advantage of our method is a direct applicability to geometrically complex systems which are difficult to analyze by integral equations. The application to the structure like quantum dots reported here is the first example of such applications. |

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 | 56 |

終了ページ | 59 |

ISSN | 0475-0071 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308633 |

JaLCDOI | 10.18926/14069 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_42_104.pdf |

著者 | Donghui, MA| Torii, Tashiyuki| Shimizu, Kenichi| Matsuba, Akira| |

抄録 | As model specimens of surface film-bonded materials, pure copper films with a thickness of 100μm were bonded to the surface of steel base with epoxy resin, where the tensile residual stress was measured by an X-ray on the surface copper film. The distribution of initial electric resistance was measured on both copper film and base specimen by a direct current potential drop technique. As a result, there was a good agreement between the measured and theoretical values. From the fatigue testing results, it was shown that the measured electric resistance increased with the fatigue crack length on the copper film, which was almost equal to the theoretical value calculated for a central slit in a plate with finite width. This was probably because the fatigue crack was opened due to the tensile residual stress on the film even under unloading condition. In addition, the internal crack length during fatigue was examined by ultrasonic testing for the film-bonded specimen. As a result, there was a difference in the fatigue crack length between the surface copper film and the inner base. |

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 | 104 |

終了ページ | 109 |

ISSN | 0475-0071 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308537 |

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 | English |

論文のバージョン | publisher |

NAID | 120002308447 |

JaLCDOI | 10.18926/14059 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_42_48.pdf |

著者 | 東辻 千枝子| Miyake Takashi| Nakanishi Kenta| 鶴田 健二| 東辻 浩夫| |

抄録 | Based on the mapping introduced by the classical-map hypernetted-chain (CHNC) method, classical numerical simulations, Monte Carlo and molecular dynamics, have been applied to the twodimensional electron fluid and the results are compared with those of quantum Monte Carlo simulations hitherto reported. It is shown that polarization properties of the ground state obtained by the diffusion Monte Carlo method are reproduced within the accuracy of quantum simulations by both of two mapping functions for the quantum temperature which have been proposed within the CHNC method. These results may serve as the basis of numerical simulations based on the CHNC method which are applicable to finite non-periodic systems like quantum dots and systems at finite temperatures. |

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 | 48 |

終了ページ | 52 |

ISSN | 0475-0071 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308425 |

JaLCDOI | 10.18926/14058 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_42_44.pdf |

著者 | Ogawa Takafumi| 鶴田 健二| 東辻 千枝子| 東辻 浩夫| Hiroshi Iyetomi| |

抄録 | To analyze vibrational properties of Si crystal with a single charge-neutral vacancy, we perform large-scale simulations based on tight-binding molecular-dynamics method. Vibrational modes and frequencies are obtained by diagonalizing dynamical matrix within a harmonic approximation. Results indicate that there exist vibrational modes spatially localized around the vacancy and large frequency shifts associated with the localized modes contribute significantly to reduction of the vibrational free energy. |

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 | 44 |

終了ページ | 47 |

ISSN | 0475-0071 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308412 |

JaLCDOI | 10.18926/14053 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_42_1.pdf |

著者 | Asatani Jun| 甲本 卓也| Toru Fujiwara| Tadao Kasami| |

抄録 | Two typical examples, the (32, 21, 6) and (64, 45, 8) extended code of primitive permuted BCH codes, are considered. The sets of minimum weight codewords are analyzed in terms of Boolean polynomial representation. They are classied by using their split weight structure with respect to the left and right half trellis sections, and for each class, the standard form is presented. Based on the results, we can generate a proper list of the minimum weight codewords of the codes. |

キーワード | Boolean polynomial representation extended BCH codes minimum weight codewords binary shift invariance property |

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 | 1 |

終了ページ | 9 |

ISSN | 0475-0071 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308333 |

JaLCDOI | 10.18926/17831 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_43_22.pdf |

著者 | 東辻 浩夫| Chai Hong| 東辻 千枝子| 鶴田 健二| |

抄録 | For the transfer of quantum information and the creation of entangled states, the application of tuned spin chains, systems of spins with the nearest-neighbor coupling tuned so as to give high efficiency, has been proposed and some examples of high performance have been given by several authors. In this article, the effect of deviations from tuned values and the effect of resultant asymmetry are investigated through numerical simulations and theoretical analyses. It is shown that there exists a system where the transfer efficiency is comparable with exactly tuned ones and, at the same time, robust to noises in the coupling constants. It is also shown that the effect of asymmetry on the efficiency of entanglement creation is of the second order when the asymmetry is small. |

出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |

発行日 | 2009-01 |

巻 | 43巻 |

開始ページ | 22 |

終了ページ | 26 |

ISSN | 1349-6115 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308966 |

JaLCDOI | 10.18926/17826 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_43_8.pdf |

著者 | Umeda Ryosuke| 東辻 千枝子| 鶴田 健二| 東辻 浩夫| |

抄録 | Metamaterial which has negative permittivity and permeability is investigated via computer simulations. Effects of the nanostructure on dielectric and magnetic properties of the material are taken into account by introducing the Drude-Lorentz model in the materials dispersion. We include multi-band process in the dielectric response in order to reproduce accurately experimental values of bulk Au thin film. Size effect on the dispersion is examined by comparing the model with that of a noble metal particle. Based on the dispersion model constructed, we analyze the electromagnetic response of nanostructured metamaterials to evanescent waves at microwave and optical frequencies via finite-difference time-domain simulatioins on parallel computer. A re- focusing and an amplification of the evanescent waves propagating through a metamaterial, consisting of metal slab/vacuum stacking, is demonstrated for the frequencies of 30GHz and 744THz. |

出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |

発行日 | 2009-01 |

巻 | 43巻 |

開始ページ | 8 |

終了ページ | 15 |

ISSN | 1349-6115 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308833 |

JaLCDOI | 10.18926/17833 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_43_27.pdf |

著者 | 東辻 浩夫| |

抄録 | When the Coulomb coupling between fine particles becomes sufficiently strong in fine particle plasmas, the isothermal compressibility of the whole system diverges and we have a phase separation and an associated critical point. Experimental conditions of fine particle plasmas, densities and temperatures of components and the fine particle size, are obtained corresponding to characteristic parameters around the critical point and the dependency on ion species and other factors is discussed. |

出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |

発行日 | 2009-01 |

巻 | 43巻 |

開始ページ | 27 |

終了ページ | 31 |

ISSN | 1349-6115 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308947 |

JaLCDOI | 10.18926/17822 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_43_1.pdf |

著者 | Shimizu, Kenichi| Torii, Tashiyuki| Ishida, Koki| |

抄録 | Using a fatigue testing method by which fatigue cracks can be initiated and propagated in a film adhered to cover an elliptical through-hole in a base plate subjected to push-pull cyclic loads, annealed copper films with the thickness of 100μm and those reduced the thickness from the 100μm to 50μm by an electro-polishing were fatigued under a constant stress amplitude with a stress ratio of zero. The crystal rotation behavior with the fatigue crack propagation was investigated by measuring the crystal orientation around the fatigue crack initiated from the notch root before and after fatigue testing, using EBSD (Electron Back-scatter Diffraction) method. Then, the change of crystal orientation with fatigue testing was evaluated quantitatively from the misorientation between the crystal orientation matrix on the same point obtained before and after fatigue testing. As a result, the angle of the crystal rotation obtained from the region showing the high fatigue crack propagation rate was larger than that obtained from the region showing the low fatigue crack propagation rate for the film with the thickness of 100μm, while the fatigue crack propagated faster in the film with the thickness of 50μm than that with the thickness of 100μm regardless of the small crystal rotation angles with the fatigue testing for the film with the thickness of 50μm. |

出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |

発行日 | 2009-01 |

巻 | 43巻 |

開始ページ | 1 |

終了ページ | 7 |

ISSN | 1349-6115 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308710 |

JaLCDOI | 10.18926/17849 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_43_99.pdf |

著者 | Kato, Hidehiro| Nogami, Yasuyuki| Morikawa, Yoshitaka| |

抄録 | A square root (SQRT) algorithm in extension field F(p(m))(m = r(0)r(1)･･･r(n−1)･2(d), r(i) : odd prime, d : positive integer) is proposed in this paper. First, a conventional SQRT algorithm, the Tonelli-Shanks algorithm, is modified to compute the inverse SQRT in F(p(2d)), where most of the computations are performed in the corresponding subfields F(p(2i)) for 0 ≤ i ≤ d-1. Then the Frobenius mappings with addition chain are adopted for the proposed SQRT algorithm, in which a lot of computations in a given extension field F(p(m)) are also reduced to those in a proper subfield by the norm computations. Those reductions of the field degree increase efficiency in the SQRT implementation. The Tonelli-Shanks algorithm and the proposed algorithm in F(p(6)) and F(p(10)) were implemented on a Core2 (2.66 GHz) using the C++ programming language. The computer simulations showed that, on average, the proposed algorithm accelerated the SQRT computation by 6 times in F(p(6)), and by 10 times in F(p(10)), compared to the Tonelli-Shanks algorithm. |

出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |

発行日 | 2009-01 |

巻 | 43巻 |

開始ページ | 99 |

終了ページ | 107 |

ISSN | 1349-6115 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308980 |

JaLCDOI | 10.18926/17851 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_43_108.pdf |

著者 | Nekado, Kenta| Kato, Hidehiro| Nogami, Yasuyuki| Morikawa, Yoshitaka| |

抄録 | Recently, pairing-based cryptographies such as ID-based cryptography and group signature have been studied. For fast pairing calculation, not only pairing algorithms but also arithmetic operations in extension field must be efficiently carried out. The authors show efficient arithmetic operations of extension field for Xate pairing especially with Freeman curve. |

出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |

発行日 | 2009-01 |

巻 | 43巻 |

開始ページ | 108 |

終了ページ | 112 |

ISSN | 1349-6115 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308904 |

JaLCDOI | 10.18926/17853 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_43_113.pdf |

著者 | Sakemi, Yumi| Kato, hidehiro| Nogami, Yasuyuki| Morikawa, Yoshikawa| |

抄録 | Barreto–Naehrig (BN) curve has been introduced as an efficient pairing-friendly elliptic curve over prime field F(p) whose embedding degree is 12. The characteristic and Frobenius trace are given as polynomials of integer variable X. The authors proposed an improvement of Miller's algorithm of twisted Ate pairing with BN curve by applying X of small hamming weight in ITC–CSCC2008; however, its cost evaluation has not been explicitly shown. This paper shows the detail of the cost evaluation. |

出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |

発行日 | 2009-01 |

巻 | 43巻 |

開始ページ | 113 |

終了ページ | 116 |

ISSN | 1349-6115 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308945 |

JaLCDOI | 10.18926/17847 |
---|---|

フルテキストURL | Mem_Fac_Eng_OU_43_93.pdf |

著者 | Ueno, Hirokazu| Morikawa, Yoshitaka| |

抄録 | This paper investigates the relation between error distribution and predictive order of minimum mean abusolute error predictors (MMAE predictors) designed for lossless coding of grayscale images. Design of MMAE predictors reduces to the linear programming problem. Let k be the number of coefficients in a predictor (predictor order), we imagine that predictor order k may have a distribution shaping effect. Main purpose of this paper is to ensure that k has such an effect. |

出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |

発行日 | 2009-01 |

巻 | 43巻 |

開始ページ | 93 |

終了ページ | 98 |

ISSN | 1349-6115 |

言語 | English |

論文のバージョン | publisher |

NAID | 120002308979 |