著者

中西 俊男

出版者

日本シミュレーション学会

雑誌

シミュレーション (ISSN:02859947)

巻号頁・発行日

vol.1, pp.17-24, 1981-12-15

著者

長谷川 浩志 吉川 向 上原 広靖 川面 恵司

出版者

日本シミュレーション学会

雑誌

シミュレーション (ISSN:02859947)

巻号頁・発行日

vol.25, no.2, pp.144-155, 2006-06-15

被引用文献数

1

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In this paper, Authors proposed a hybrid meta-heuristic method for the integer optimization of multi-peak problems to support the engineering field. For the search ability of the optimal process, the proposed method did not define a traditional combination, i.e., combining global search ability and local search ability, but newly defined the combination of multi search ability (MSA), local search ability (LSA) and neighborhood optimal search ability (NOSA). For NOSA, this proposed method introduced direct search process which self-changes design variables with reflecting recognition of dependence relation among design variables automatically. The proposed method was applied to some benchmark functions to estimate its performance, and was confirmed that it improved amount of computational cost and convergence up to the optimal solution.

著者

村井 康二 林 祐司

出版者

日本シミュレーション学会

雑誌

シミュレーション (ISSN:02859947)

巻号頁・発行日

vol.25, no.4, pp.289-296, 2006-12-15

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Recently, the environmental destruction problems are international social problems. The transport systems are important elements for the conservation of the air environment. The environmental parameters are CO_2, NO_x and SO_x from the transport systems. This paper describes the effects of the reduction for CO_2, NO_x and SO_x by systematizing ship's navigation schedule planning (Eco-navigation systems: Eco-navi) which can utilize the tidal current and the wind in inland sea. The Eco-navi consists of three sub-systems: "Cell decision system", "Current calculation system", and "Wind calculation system". We define 'Cell' as the minimum unit for calculating the hours underway. The cell, latitude: 1' ×longitude: 1', has the current and wind information. We can calculate the hours underway by utilizing the current/wind effects. We calculated the hours underway for the neap tides, ligging the tides and the spring tides of 'Kobe' to 'Hesaki' by using the data of training ship Fukae Maru, and its time saving ration is 5.1%, 9.6%, and 14.8% respectively, even if we reduce the system errors (3.8%). We proposed about 5% reduction of air pollution (CO_2, NO_x, SO_x) from the vessel in inland sea.

著者

宮内 康行 桝田 道夫 清水 正亜 藤田 恵一 矢川 元基

出版者

日本シミュレーション学会

雑誌

シミュレーション (ISSN:02859947)

巻号頁・発行日

vol.2, no.2, pp.105-113, 1983-07-15

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Two advanced methods for 2-dimensional finite element analysis of natural convection were developed and explained in this paper. The one method, based on the stream function-vorticity formulation, could get rid of numerical errors and constraint of perpendicular mesh subdivision by excluding a finite difference approximation of vorticity on no-slip boundaries. The other method, besed on primitive variables and the penalty function method, could reduce the number of independent variables by excluding pressure terms from basic equations, and economize computer memories considerably. A strong stabilizing effect of upwinding was observed in both methods. These methods were successfully applied to problems of natural convection around a horizontal hot cylinder.

著者

和泉 潔

出版者

日本シミュレーション学会

雑誌

シミュレーション (ISSN:02859947)

巻号頁・発行日

vol.23, no.3, pp.183-190, 2004-09-15

被引用文献数

2

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This paper introduces an artificial market approach, a new agent-based simulation approach of financial markets, and overviews artificial market researches that test economic theories of financial markets. First, we introduce our study that rethought efficient market hypothesis from a viewpoint of complexity of market participants' prediction methods and market price's dynamics, and examined the hypothesis using simulation results of our artificial market model. Then, we review other artificial market studies. Finally, we show some future directions of artificial market studies and their requirements.

著者

姫野 信吉

出版者

日本シミュレーション学会

雑誌

シミュレーション (ISSN:02859947)

巻号頁・発行日

vol.12, no.4, pp.262-267, 1993-12-15

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The Rigid Body Spring Model (RBSM) is extended and applied to prediction of muscle contraction forces around the human hip joint. A cadaver is disected to measure weights and lenghts of its muscles. Every muscle bandle is modeled as a spring, whose stiffness is proportional to its cross-sectional area. Boundary conditions are given to solve as ordinary way of RBSM. Every muscle contraction force is given as a tensile force of its relative spring. Muscle forces and their resultant joint force vector are thus obtained quite easily. This method is expected useful to analyze locomotion systems of living bodies.

著者

矢吹 太朗 伊庭 斉志

出版者

日本シミュレーション学会

雑誌

シミュレーション (ISSN:02859947)

巻号頁・発行日

vol.23, no.3, pp.177-182, 2004-09-15

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Swarm, a software package for multi-agent simulation of complex systems, is introduced. This library supplies researchers with varieties of graphical user interfaces and a useful scheduler for discrete time step simulation. We first explain tutorials for beginners of complex systems and Swarm. We then show two practical simulation examples implemented on Swarm, e.g., percolation on a two dimensional tetragonal lattice and Turing's model of morphogenesis. For the readers' information, we give the installation manual of Swarm in Windows system in the appendix. We also discuss some Swarm's defects and possible extensions for the purpose of future research.