• Title/Summary/Keyword: prediction computer program

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Development of technique for slope hazards prediction using decision tree model (의사결정나무모형을 이용한 급경사지재해 예측기법 개발)

  • Song, Young-Suk;Cho, Yong-Chan;Chae, Byung-Gon
    • Proceedings of the Korean Geotechical Society Conference
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    • 2009.09a
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    • pp.233-242
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    • 2009
  • Based on the data obtained from field investigation and soil testing to slope hazards occurrence section and non-occurrence section in crystalline rocks like gneiss, granite, and so on, a prediction model was developed by the use of a decision tree model. The classification standard of the selected prediction model is composed of the slope angle, the coefficient of permeability and the void ratio in the order. The computer program, SHAPP ver. 1.0 for prediction of slope hazards around an important national facilities using GIS technique and the developed model. To prove the developed prediction model and the computer program, the field data surveyed from Jumunjin, Gangneung city were compared with the prediction result in the same site. As the result of comparison, the real occurrence location of slope hazards was similar to the predicted section. Through the continuous study, the accuracy about prediction result of slope hazards will be upgraded and the computer program will be commonly used in practical.

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Development and its APPLIcation of Computer Program for Slope Hazards Prediction using Decision Tree Model (의사결정나무모형을 이용한 급경사지재해 예측프로그램 개발 및 적용)

  • Song, Young-Suk;Cho, Yong-Chan;Seo, Yong-Seok;Ahn, Sang-Ro
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.29 no.2C
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    • pp.59-69
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    • 2009
  • Based on the data obtained from field investigation and soil testing to slope hazards occurrence section and non-occurrence section in crystalline rocks like gneiss, granite, and so on, a prediction model was developed by the use of a decision tree model. The classification standard of the selected prediction model is composed of the slope angle, the coefficient of permeability and the void ratio in the order. The computer program, SHAPP ver. 1.0 for prediction of slope hazards around an important national facilities using GIS technique and the developed model. To prove the developed prediction model and the computer program, the field data surveyed from Jumunjin, Gangneung city were compared with the prediction result in the same site. As the result of comparison, the real occurrence location of slope hazards was similar to the predicted section. Through the continuous study, the accuracy about prediction result of slope hazards will be upgraded and the computer program will be commonly used in practical.

RELTSYS: A computer program for life prediction of deteriorating systems

  • Enright, Michael P.;Frangopol, Dan M.
    • Structural Engineering and Mechanics
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    • v.9 no.6
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    • pp.557-568
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    • 2000
  • As time-variant reliability approaches become increasingly used for service life prediction of the aging infrastructure, the demand for computer solution methods continues to increase. Effcient computer techniques have become well established for the reliability analysis of structural systems. Thus far, however, this is largely limited to time-invariant reliability problems. Therefore, the requirements for time-variant reliability prediction of deteriorating structural systems under time-variant loads have remained incomplete. This study presents a computer program for $\underline{REL}$iability of $\underline{T}$ime-Variant $\underline{SYS}$tems, RELTSYS. This program uses a combined technique of adaptive importance sampling, numerical integration, and fault tree analysis to compute time-variant reliabilities of individual components and systems. Time-invariant quantities are generated using Monte Carlo simulation, whereas time-variant quantities are evaluated using numerical integration. Load distribution and post-failure redistribution are considered using fault tree analysis. The strengths and limitations of RELTSYS are presented via a numerical example.

A comparative Study of Noise Prediction Method for Road Traffic Noise Map -Focused on Foreign Traffic Noise Prediction Method- (소음지도 제작을 위한 도로교통 소음예측식 비교연구 -국외 예측식을 중심으로-)

  • Jang, Hwan;Bang, Min;Kim, Heung-Sik
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2008.11a
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    • pp.709-714
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    • 2008
  • The various computer programs are used in computer simulation of the traffic noise prediction. But the difference or problem of calculation method used for road traffic noise prediction is not exactly investigated. In this paper, Road traffic noise is predicted on the specific regions by using four prediction methods such as XPS31-133 model(France), RLS-90 model(Germany), ASJ RTN model(Japan) and FHWA model(U.S.A.), which are operated by a program named SoundPLAN, a program to predict road traffic noise. Those prediction values are compared with a measurement value. The results show that four prediction values for taraffic noise are a little different, because of various input factors according to the prediction methods.

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A Computer Program for System Reliability Prediction (시스템의 신뢰성(信賴性) 예측(豫測)을 위한 컴퓨터 프로그램)

  • Kim, Yeong-Hwi;Choe, Mun-Gi
    • Journal of Korean Institute of Industrial Engineers
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    • v.1 no.2
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    • pp.51-56
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    • 1975
  • A computer program for computing complex system reliability is described. The program is composed of three phases : Phase I program reduces all series, parallel and series-parallel components and subsequently obtains an irreducible non-series-parallel system. Phase II program enumerates all the possible paths from the source to the sink of the graph. Phase III program then computes system reliability based on the information obtained by the Phase II program. The program is based on a modified version of the algorithm published in [6]. An example of the use of the computer program is given.

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Prediction of Environmental Fate of Certain Chemicals Using Computer Simulation Programs (Computer Program을 이용한 화학물질의 환경동태 예측)

  • Kim, Kyun;Kim, Yong-Hwa
    • Korean Journal of Environmental Agriculture
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    • v.12 no.1
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    • pp.69-80
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    • 1993
  • Environmental hazards of a chemical could be assessed by two different approaches : toxicity test and assessment of exposure potentials to human and environmental organisms. For the prediction of environmental fate of chemicals three available computer programs were compared each other and were verified. The results obtained by using these computer programs, PCHEM, EXAMS, and E4CHEM were summarized as follows. The estimated octanol/water partition coefficients by PCHEM were similar to the experimental values in the literature. But the other factors, water solubility and vapor pressure were different from the data in the literature. The simulation results of selected compounds by EXAMS showed similar tendency to the literature results of model field environment. Therefore, this computer program could be utilized to predict the environmental fate of chemicals. E4CHEM program is very simple and this program could predict the ultimate environmental fate of stable chemicals by input of two or three parameters. However, the validity should further be verified in the future field study using more compounds. It is suggested that these approaches could be fully utilized by understanding their limitations to predict the environmental fate of new chemicals under development, to screen the potential environmental pollutants among chemicals already-in use, and to devise measures to minimize the hazards to the environment.

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Integrated CAD/CAE System for Planing Hull Form Design (활주형 선박의 선형설계를 위한 통합 CAD/CAE 시스템)

  • 김태윤;김동준
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.39 no.4
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    • pp.298-304
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    • 2003
  • In this paper a free-form hull design program and performance prediction program for planing boat is introduced. This program enables the designer to do complex geometric hull shape design on a personal computer and accurately to predict power requirements for a given loading and velocity. For a free form design, Bezier curve model is adopted as a basic representation tool of curves and surfaces, and this program has versatile functions to do fairing jobs with a convenient graphical user interface. After creating a hull form the geometric data is provided in a manner compatible with a variety of analysis tools including 'Motion Analysis(by Zarnick)' for prediction of motion characteristics in regular waves, 'Running Attitude (by Savitsky)' for prediction of the running attitude and required power.

COMPUTER PROGRAMS WHICH ENABLE PRICING OF SHEEP AND LAMB CARCASSES BASED ON YIELD ESTIMATION SUITABILITY AND FINANCIAL PARAMETERS

  • Hopkins, D.L.;Hayhurst, G.;Horcicka, J.V.
    • Asian-Australasian Journal of Animal Sciences
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    • v.5 no.1
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    • pp.1-5
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    • 1992
  • A computer program called LAMPRO has been developed for use by the Australian meat industry to assist with the pricing of lamb carcasses. Based on a series of prediction equations and accounting for the cost structure of a meat processor the program allows the real value of a carcass to be established. The concept has also been extended to cater for mutton carcasses destined for either domestic or export markets incorporated in a program called MUTONPRO.

A Study on the Computer Program for the Shipboard Noise Prediction - using Statistical Energy Analysis - (선박 소음 예측 전산 프로그램의 개발에 관한 연구 -통계적 에너지 해석법을 이용한-)

  • Sa-Soo Kim;Ku-Kyun Shin;Hong-Gi Lee
    • Journal of the Society of Naval Architects of Korea
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    • v.28 no.2
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    • pp.293-306
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    • 1991
  • During the last few years recommendations or regulations concerning permissible noise levels on shirts have been issued by the authorities in most countries. For these reasons the need for useful and accurate noise prediction computer programs has been emphasized. A noise prediction program can make it possible to find the most economical solution to achieve a certain noise requirement. This paper attempts to develop a noise prediction computer program using statistical energy analysis(SEA). In this paper, the SEA is used to predict the sound transmission loss for airborne noise and the vibration amplitude of the panel consisting of ship spaces such as floor, wall, and ceiling for structureborne noise. And in order to verify the prediction, a small passenger vessel, G/T120 tons, is selected. It has been shown that the prediction is capable of giving results in good practical agreement with measurements and therefore it is useful for predicting the nolle levels in ships and establishing the countermeasures at early design stage.

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