巻号一覧
49 巻 (2006)
- 4 号 p. 279-
- 3 号 p. 151-
- 2 号 p. 83-
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49 巻, 4 号
選択された号の論文の13件中1～13を表示しています
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原稿種別: 表紙
2006 年 49 巻 4 号 p. Cover10-
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーPDF形式でダウンロード (14K) -
原稿種別: 付録等
2006 年 49 巻 4 号 p. App6-
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーPDF形式でダウンロード (63K) -
Kiyoshi Yoneda原稿種別: 本文
2006 年 49 巻 4 号 p. 279-289
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーA new method is proposed to solve systems of linear approximate equations Xθ≈y where the unknowns θ and the data y are positive and the matrix X consists of nonnegative elements. Writing the i-th near-equality X_i.θ/y_i≈1 the assumed model is X_i.θ/y_i=ζ_i with mutually independent positive errors ζ_i. The loss function is denned by Σw_i(ζ_i-1)logζ_i in which w_i is the importance weight for the i-th near-equality. A reparameterization reduces the method to unconstrained minimization of a smooth strictly convex function implying the unique existence of positive solution and the applicability of Newton's method that converges quadratically. The solution stability is controlled by weighting prior guesses of the unknowns θ. The method matches the maximum likelihood estimation if all weights wi are equal and ζ_i independently follow the probability density function ∝ t^<ω(1-t)>,0<ω.抄録全体を表示PDF形式でダウンロード (694K) -
Yasuhito Kishi, Issei Kino原稿種別: 本文
2006 年 49 巻 4 号 p. 290-305
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーA class of semi-Markov process was introduced by Latouche and referred as the semi-Poisson process in which the intervals of time between events are identically, exponentially distributed random variables and are not independent but dependent random variables. In this paper, we extend the class of semi-Poisson process to the class in which the random variables axe identically distributed with a given PH-distribution and are not independent but dependent. We refer it as the semi-PH process.抄録全体を表示PDF形式でダウンロード (947K) -
Ryusuke Hohzaki原稿種別: 本文
2006 年 49 巻 4 号 p. 306-318
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーThis paper deals with an inspection game of the customs and a smuggler. The customs can take two options of assigning a patrol or not. The smuggler has two strategies of shipping its cargo of contraband or not. Two players have several opportunities to take an action during a limited number of days but only the smuggler cannot discard any opportunity intentionally. When the smuggling coincides with the patrol, there are three possibilities that the customs captures the smuggler, the smuggler makes a success of the smuggling or none of them happens. If the smuggler is captured or there remains no day for playing the game, the game ends. There have been some studies so far on the inspection game. Some consider the cases that the smuggler has only one smuggling or the perfect-capture case that the customs can certainly arrest the smuggler on patrol, and others think of a recursive game without the probabilities of fulfilling players' purposes. However there has been little study in which they discussed the stochastic inspection. In this paper, we formulate the problem into a multi-stage two-person zero-sum stochastic game and investigate some characteristics of its equilibrium solution, some of which are given in closed forms in special cases.抄録全体を表示PDF形式でダウンロード (936K) -
Shinya Mizuno, Yutaka Sakuma, Masakiyo Miyazawa原稿種別: 本文
2006 年 49 巻 4 号 p. 319-331
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーWe consider congestion of traffics that are randomly produced in a bounded area. Those traffics start at local lines which are connected to a main line, and they have a common destination located at the end of the main line. We assume that a stream on the main line runs with a constant speed, while local traffics can join the main stream only if a certain free space condition is satisfied. So, there may arise queues at junctions where the local lines meet the main line. Our primary interest is to see congestion at the junctions. To this end, we formulate this model as a discrete time queueing process, and compute the stationary distributions of the queue lengths at the junctions, provided stability conditions are satisfied. In particular, we give inductive formulas to compute the mean queue lengths. This model may be applied to road traffics and synchronous data transfers in telecommunication networks. From the theoretical point of view, the model may be considered as an extension of priority queues. Some numerical examples are presented as well.抄録全体を表示PDF形式でダウンロード (899K) -
Kouichi Taji, Keiji Matsumoto原稿種別: 本文
2006 年 49 巻 4 号 p. 332-341
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーIn the analytic hierarchy process (AHP), the consistency of pairwise comparison is measured by the consistency index (CI) value of pairwise comparison matrices. The CI value is denned by the size and the principal eigenvalue of comparison matrix, and the larger the CI value is, the less consistent pairwise comparison is. In this paper, we propose the estimation method of consistency intervals, in which the pairwise comparison value can move without exceeding given CI threshold. The proposed method is based on the eigenvalue method but does not calculate the principal eigenvalue and eigenvector at all, and hence, the method enables quick estimation. The method also enables us to detect which pairwise comparison leads to inconsistency of pairwise comparison and what extent the consistency can be improved, if the CI value of an original comparison matrix is large. Several numerical examples show that the proposed method is practically efficient.抄録全体を表示PDF形式でダウンロード (699K) -
原稿種別: 付録等
2006 年 49 巻 4 号 p. 342-
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーPDF形式でダウンロード (58K) -
原稿種別: 索引
2006 年 49 巻 4 号 p. 343-345
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーPDF形式でダウンロード (97K) -
原稿種別: 索引
2006 年 49 巻 4 号 p. 346-348
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーPDF形式でダウンロード (139K) -
原稿種別: 付録等
2006 年 49 巻 4 号 p. App7-
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーPDF形式でダウンロード (92K) -
原稿種別: 表紙
2006 年 49 巻 4 号 p. Cover11-
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーPDF形式でダウンロード (27K) -
原稿種別: 表紙
2006 年 49 巻 4 号 p. Cover12-
発行日: 2006年
公開日: 2017/06/27
ジャーナル フリーPDF形式でダウンロード (27K)
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