• Title/Summary/Keyword: model factor

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Time Variant Parameter Estimation using RLS Algorithm with Adaptive Forgetting Factor Based on Newton-Raphson Method (Newton-Raphson법 기반의 적응 망각율을 갖는 RLS 알고리즘에 의한 원격센서시스템의 시변파라메타 추정)

  • Kim, Kyung-Yup;Lee, Joon-Tark
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • 2007.04a
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    • pp.435-439
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    • 2007
  • This paper deals with RLS algorithm using Newton-Raphson method based adaptive forgetting factor for a passive telemetry RF sensor system in order to estimate the time variant parameter to be included in RF sensor model. For this estimation with RLS algorithm, phasor typed RF sensor system modelled with inductive coupling principle is used. Instead of applying constant forgetting factor to estimate time variant parameter, the adaptive forgetting factor based on Newton-Raphson method is applied to RLS algorithm without constant forgetting factor to be determined intuitively. Finally, we provide numerical examples to evaluate the feasibility and generality of the proposed method in this paper.

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The Effect of 'Process' Factor and 'Infra' Factor in Quality Management on Manufacturing Capabilities and Performance (품질경영 추진방식의 Infra 요인과 Process 요인이 생산경쟁력과 성과에 미치는 영향)

  • Chang, Deok-Shin;Kim, Soo-Wook;Park, Jeong-Soo
    • Journal of the Korean Operations Research and Management Science Society
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    • v.32 no.2
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    • pp.41-51
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    • 2007
  • We categorize quality management practices as two factors ; 'infra factor' and 'process factor.' We confirm the factors' statistical significance with empirical investigation about 167 manufacturing companies in nationwide. Moreover, we find the two factors affect positively on the manufacturing capabilities of differentiation and reliability, and on the performances as improving products and process. We prove these results with empirical method of structural equation model and AMOS program.

Intrinsic Priors for Testing Two Normal Means with the Default Bayes Factors

  • Jongsig Bae;Kim, Hyunsoo;Kim, Seong W.
    • Journal of the Korean Statistical Society
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    • v.29 no.4
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    • pp.443-454
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    • 2000
  • In Bayesian model selection or testing problems of different dimensions, the conventional Bayes factors with improper noninformative priors are not well defined. The intrinsic Bayes factor and the fractional Bayes factor are used to overcome such problems by using a data-splitting idea and fraction, respectively. This article addresses a Bayesian testing for the comparison of two normal means with unknown variance. We derive proper intrinsic priors, whose Bayes factors are asymptotically equivalent to the corresponding fractional Bayes factor. We demonstrate our results with two examples.

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The Evaluation of Soil Loss Considering the R-Factor Value Following the Climate Change (기후변화에 따른 R-Factor 값을 고려한 토양 유실량 평가)

  • Park, Jaehyun;Kim, Dongju;Kim, Minkyu;Jang, Chunhwa;Kang, Hyunwoo;Kum, Donghyuk;Lim, Kyoung
    • KCID journal
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    • v.21 no.1
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    • pp.64-77
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    • 2014
  • This study evaluated the soil loss considering the R-Factor value following the climate change. To calculate the soil loss of the basin in Jaun-ri, Hongcheon-gun which is the study area, the future climate change scenario and convenience revision were used to build the past 30 years, future 30 years R-Factor and it was applied to USLE model. As a result, as the R-Factor value declined a little in the future, the soil loss was also reduced but it corresponds to the 'very high' according to the OECD soil loss grade so the solution to reduce the soil loss is necessary and it can be used for another study material.

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A Study on the Disturbing Factors in University's Hospital Reengineering Project (한 대학병원 종사자들이 인지하는 병원경영혁신의 장애 요인)

  • Nam, Eun-Woo;Van, Myeong-Kyu
    • Korea Journal of Hospital Management
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    • v.1 no.1
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    • pp.136-153
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    • 1996
  • The purpose of this study is to identify the factors hindering hospital reengineering project in one university hospital. The data was collected by the self-administered Questionnaire to 288 members of the hospital in Pusan on April 5-18, 1996. This study took some statistical methodologies, such as descriptive analysis, factor analysis and logit model analysis. The results were as follows; First, in the descriptive analysis for whether the hospital reengineering named RUSH94 was a success or not, the subjects judged that it was not successful and regarded their fable mutual communication as the main factor. Second, in the reason of failure at the reengineering project, the group who thought that the failure factor was the lack of mutual consensus checked the scores of the first factor produced from the factor analysis.

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The Characteristic of Friction-Factor on Honeycomb Surfaces (Part I : Experimantal Tests and Friction-Factor Modeling) (허니콤 표면의 마찰계수 특성에 관한 연구 (Part 1 : 표면 마찰계수 측정 및 모델링))

  • 하태웅
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.18 no.6
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    • pp.1430-1438
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    • 1994
  • Friction-factors for honeycomb surfaces are measured with a flat plate tester. The flat plate test apparatus is described and method is discussed for determining the friction-factor experimentally. The friction-factor is calculated for the flat plate test based on the Fanno-line flow. The test parameters are honeycomb cell width, depth, clearance, inlet pressure, and Reynolds number(or Mach number). A new empirical friction-factor model for honeycomb surfaces are developed as a function of these parameters.