• Title, Summary, Keyword: Computer simulation

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Worm Virus Modeling and Simulation Methodology Using Artificial Life. (인공생명기반의 웜 바이러스 모델링 및 시뮬레이션 방법론)

  • Oh Ji-yeon;Chi Sung-do
    • Proceedings of the Korea Society for Simulation Conference
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    • pp.171-179
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    • 2005
  • Computer virus modeling and simulation research has been conducted with focus on the network vulnerability analysis. However, computer virus generally shows the biological virus characters such as proliferation, reproduction and evolution. Therefore it is necessary to research the computer virus modeling and simulation using Artificial Life. The approach of computer modeling and simulation using the Artificial Life technology Provides the efficient analysis method for the effects on the network by computer virus and the behavioral mechanism of the computer virus. Hence this paper proposes the methodology of computer virus modeling and simulation using Artificial Life, which may be contribute the research on the computer virus vaccine.

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A Computer Simulation of a Driving Vehicle Performance using an Set of Engine Part Load Performance and a Transmission Shift Map (엔진 부분 부하 성능 및 변속기 시프트맵을 이용한 차량주행성능 컴퓨터 시뮬레이션)

  • Lee, Choong Hoon
    • Journal of ILASS-Korea
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    • v.19 no.2
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    • pp.64-68
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    • 2014
  • A driving vehicle performance which is driven by FTP-75 mode was simulated by computer. Throttle valve position, engine speed, air mass flow rate, fuel consumption et al. were computer simulated. A set of engine part load performance data, automatic transmission shift map and vehicle specifications were used for the computer simulation. Throttle valve position, engine speed, air mass flow rate et al. measured for evaluating the computer simulation results by driving the vehicle with FTP-75 mode on a chassis dynamometer. GT-Power$^{(R)}$ software was used for the computer simulation of the driving vehicle performance. Experimental fuel consumption rate was measured by using an ECU HILS fuel injection system. The experimental data and simulation results were compared. The computer simulation of the driving vehicle performance predicts the measured data well comparatively.

JAVA-BASED SIMULATION FOR DEVS

  • Bai, Tao;Zeng, Jianchao;Wang, Meng
    • Proceedings of the Korea Society for Simulation Conference
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    • pp.349-353
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    • 2001
  • There are many excellent characters of Java-based simulation compared with existing ones in the respect of running on the Internet/Web, reuse, integration and etc.. In this paper, the main idea of design and realization of Java-based modeling and simulation software for DEVS will be discussed in detail.

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A Statistical Estimation of The Universal Constants Using A Simulation Predictor

  • Park, Jeong-Soo-
    • Proceedings of the Korea Society for Simulation Conference
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    • pp.6-6
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    • 1992
  • This work deals with nonlinear least squares method for estimating unknown universial constants C in a computer simulation code real experimental data(or database) and computer simulation data. The best linear unbiased predictor based on a spatial statistical model is fitted from the computer simulation data. Then nonlinear least squares estimation method is applied to the real data using the fitted prediction model(or simulation predictor) as if it were the true simulation model. An application to the computational nuclear fusion device is presented.

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The Study on the Dimensional Computer Simulation of Solidification behavior by FDM in Al-Bronze Casting (Al-bronze에 있어서 직접차분법에 의한 2차원 응고해석에 관한 연구)

  • Choe, Jeong-Gil;Jeong, Un-Jae;Kim, Dong-Ok
    • 한국기계연구소 소보
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    • pp.111-123
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    • 1987
  • Two dimensional computer simulation of solidification behavior using FDM as simulation tool was applied to AI-bronze casting. By the comparison of computer simulation with the experimental results, it was showed that the final shrinkage position and solidification time are good accordance with results of computer simulation. It is expected that this software will be widely applied to casting design or rise ring for directional solidification.

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A Study on the Implementation of GPSS Program on a Parallel Computer (GPSS 프로그램의 병렬화에 관한 연구)

  • 윤정미
    • Journal of the Korea Society for Simulation
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    • v.8 no.2
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    • pp.57-72
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    • 1999
  • With the rapidly increasing complexity of decision-marking or system development in the fields of industry, management, etc., modelling techniques using simulation has become more highlighted. Particularly, the advent of parallel computer systems not only has opened a new horizon of parallel simulation, but also has greatly contributed to the speed-up of the execution of simulation. The implementation of parallel simulation, however, is not a easy job for those who accustomed to the existing computer systems. And it is also necessarily confronted with the problem of synchronization conflict in the process. Thus, how to allow a wider community of users to gain access to parallel simulation while solving synchronization conflicts has become an important issue in simulation study. As a method to solve these problems, this paper is primarily concerned with the implementation of GPSS which is a generally used simulation language for discrete event simulation, onto a parallel computer using C-LINDA. For that, this paper, is to suggest a model and algorithm and to experiment it using a case.

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Analysis of the Productivity of Automobile Painting Process using Computer Simulation (생산성 향상을 위한 챠량 도장공정의 시뮬레이션)

  • 김충규
    • Proceedings of the Korea Society for Simulation Conference
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    • pp.94-99
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    • 1999
  • In this Paper, the estimation method of painting process in the automobile plant using computer simulation techniques is studied to improve the bottle neck process, the weak point and the productivity. For model and analysis, Promodel is used which is a manufacturing oriented simulation software developed by Promodel corporation in the U.S.A. Firstly the result of the simulation shows that we can obtain capability improvement in the system performance using computer simulation. Secondly, the optimum system specification is decided by comparing reports generated by scenario in simulation program find out the suitable conditions. Finally, the speed of conveyor and a pitch of painting body as the most critical parameters are chosen on the basis of exhaustive field evaluation to study their effects o the capacity of the process. The best alternative condition for the maximum capacity of the process is selected by computer simulation.

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An Integrated Simulation Method to Support Virtual Factory Engineering

  • Zhai, Wenbin;Fan, Xiumin;Yan, Juanqi;Zhu, Pengsheng
    • International Journal of CAD/CAM
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    • v.2 no.1
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    • pp.39-44
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    • 2002
  • This paper presents a structure and architecture of an integrated simulation method (ISM) to meet the requirements of virtual factory engineering (VFE). Combining CAD, VR and discrete event simulation techniques, the ISM provides static and dynamic simulation functions for implementation of VFE throughout the lifecycle. The static simulation can be used to evaluate the factory layout. The dynamic simulation enables us to evaluate ergonomics of factory, process performance of production system, feasibility of production plan and operation of factory, and to train operators safely, which cover the whole VFE lifecycle. The principles of the key techniques of VFE, including virtual factory data management system (VFDMS), static and dynamic simulation, are also discussed. To demonstrate and validate the ISM, a case study has been carried out in an assembly factory.

Worm Virus Modeling and Simu1ation Methodology Using Artificial Life (인공생명 기반의 웜바이러스 모델링 및 시뮬레이선 방법론)

  • You, Yong-Jun;Chae, Soo-Hoan;Chi, Sung-Do;Oh, Ji-Yeon
    • Journal of the Korea Society for Simulation
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    • v.15 no.4
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    • pp.1-10
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    • 2006
  • Computer virus modeling and simulation research has conducted with focus on the network vulnerability analysis. But computer virus shows the biological virus characters such as proliferation, reproduction and evolution. Therefore it is necessary to research the computer virus modeling and simulation using the Artificial life technique. The approach of computer modeling and simulation using Artificial life provides the analysis method about the effects on the network by computer virus and the behavior mechanism of computer virus. Hence this paper proposes the methodology of computer virus modeling and simulation using Artificial life, which is effected to contribute the research on the computer virus vaccine.

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Evaluating Service System Alternatives via a Computer Simulation-enabled MCDM Framework

  • Deng, Wei-Jaw;Pei, Wen;Tsai, Chih-Hung
    • International Journal of Quality Innovation
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    • v.8 no.2
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    • pp.100-114
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    • 2007
  • Decision makers in the service industry must effectively cope with queuing problems, service capacity optimization, service efficiency and service quality problems. This study proposes a computer simulation-enabled MCDM framework that integrates computer simulation analysis, Taguchi method, expert opinion and multiple criteria decision making (MCDM) to assist decision makers in coping with decision problems. In this framework, Taguchi method is adopted to reduce the time required for the simulation experiment. Computer simulation analysis is adopted to obtain useful information for rapid decision-making without interrupting actual production. MCDM is used to select the optimal alternative. The illustrative result is extremely promising.