• 제목/요약/키워드: Estimations of parameters

검색결과 189건 처리시간 0.03초

관개용 저수지의 퇴사량과 유역 유사량 추정식 (Predictive Equations for Deposits and Sediment Yields at Irrigation Reservoirs)

  • 김진택;박승우;서승덕
    • 한국농공학회지
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    • 제35권2호
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    • pp.104-115
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    • 1993
  • The objectives of this paper were to develop predictive equations for reservoir deposits and watershed sediment yields based on sediment survey data for irrigation reservoirs. Hundred reservoirs of various sizes, which have the surveyed data for sediment deposits, were chosen and fourteen watershed physiological and hydrological parameters were investigated. Correlationships between watershed parameters and sediment deposits were investigated and a best fit regression equation was derived, which may be applied for estimating reservoir sediment deposits. The sediment deposits were converted to the watershed sediment yields by applying the trap efficiencies and specific weights. The resulting sediment yields were related to watershed parameters and an empirical predictive equation was also proposed that may be used for rough estimations of watershed sediment yields.

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Effects of noe-economic factors on the cyclcal fluctuations of price level in Korea

  • Yoon, Suk-Bum
    • Journal of the Korean Statistical Society
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    • 제3권1호
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    • pp.17-30
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    • 1974
  • There are a number of studies on the peculiarities of inflation in underdeveloped economies. These studies are, however, confined to the cases of Latin American countries, and the essence of methodologies applied in the studies is basically estimations of linear parameters of an extended quantity equation with lagged variables. As it is generally observed, inflation in most of underdeveloped economies are, to some extent, affected by non-economic factors such as political instability, social disorder, abrupt institutional changes, etc. Sometimes, these factors underlying the basic movement of price level change are reflected in such variables as quantity of money supply, income velocity, gross national product.

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FUNDAMENTAL STUDY OF INTELLIGENT MUSTI-FUNCTIONAL INSTRUMENTATION AND ITS SIGNAL PRICESSING ABILITIES

  • Wakuya, Hiroshi;Shimoyama, Akihiko;Shida, Katsunori
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 1995년도 Proceedings of the Korea Automation Control Conference, 10th (KACC); Seoul, Korea; 23-25 Oct. 1995
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    • pp.166-169
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    • 1995
  • An intelligent system which is an integration of multi-functional instrumentation (MFI) and a neural network is discussed. According to some experiments of temperature and wind velocity it is clear that this system can learn the data structure of two parameters above. So it makes good performances for estimations of non-sample data.

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Estimating exponentiated parameter and distribution of quotient and ratio in an exponentiated Pareto

  • Moon, Yeung-Gil;Lee, Chang-Soo;Kang, Jun-Ho
    • Journal of the Korean Data and Information Science Society
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    • 제21권5호
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    • pp.967-972
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    • 2010
  • We shall consider estimations of an exponetiated parameter of the exponentiated Pareto distribution with known scale and threshold parameters. A quotient distribution of two independent exponentiated Pareto random variables is obtained. We also derive the distribution of the ratio of two independent exponentiated Pareto random variables.

Estimations in a skewed uniform distribution

  • Son, Hee-Ju;Woo, Jung-Soo
    • Journal of the Korean Data and Information Science Society
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    • 제20권4호
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    • pp.733-740
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    • 2009
  • We obtain a skewed uniform distribution by a uniform distribution, and evaluate its coeffcient of skewness. And we obtain the approximate maximum likelihood estimator (AML) and moment estimator of skew parameter in the skewed uniform distribution. And we compare simulated mean squared errors (MSE) of those estimators, and also compare MSE of two proposed reliability estimators in two independent skewed uniform distributions each with different skew parameters.

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Estimations in a Skewed Double Weibull Distribution

  • Son, Hee-Ju;Woo, Jung-Soo
    • Communications for Statistical Applications and Methods
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    • 제16권5호
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    • pp.859-870
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    • 2009
  • We obtain a skewed double Weibull distribution by a double Weibull distribution, and evaluate its coefficient of skewness. And we obtain the approximate maximum likelihood estimator(AML) and moment estimator of skew parameter in the skewed double Weibull distribution, and hence compare simulated mean squared errors(MSE) of those estimators. We compare simulated MSE of two proposed reliability estimators in two independent skewed double Weibull distributions each with different skew parameters. Finally we introduce a skewed double Weibull distribution generated by a uniform kernel.

THE LENGTH-BIASED POWERED INVERSE RAYLEIGH DISTRIBUTION WITH APPLICATIONS

  • MUSTAFA, ABDELFATTAH;KHAN, M.I.
    • Journal of applied mathematics & informatics
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    • 제40권1_2호
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    • pp.1-13
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    • 2022
  • This article introduces a new distribution called length-biased powered inverse Rayleigh distribution. Some of its statistical properties are derived. Maximum likelihood procedure is applied to report the point and interval estimations of all model parameters. The proposed distribution is also applied to two real data sets for illustrative purposes.

Inference on P(Y

  • Kim, Joong-Dae;Moon, Yeung-Gil;Kang, Jun-Ho
    • Journal of the Korean Data and Information Science Society
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    • 제14권4호
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    • pp.989-995
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    • 2003
  • Inference for probability P(Y

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Real-time Aircraft Parameter Estimation using LWR

  • Song,Yongkyu;Hong, Sung-Kyung
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2001년도 ICCAS
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    • pp.141.4-141
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    • 2001
  • In this paper the Local Weighted Regression LWR technique is applied to the estimation of aircrcraft parameters. The method consists In improving the Local Weighted Regression LWR technique by adding a data Retention-and-Deletion RD strategy. The improvement comes with reduced computational effort since the two techniques can share their main computational procedures. The purpose of the study was to establish if the proposed algorithm could provide fast and reliable real-time estimations, with accuracy comparable to other well-known off-line identification schemes. The algorithm was tested using specific parameter estimation maneuvers and flight data of the NASA F/A-18 HARV. The results were compared with both the estimation obtained from ...

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Reliability Tests on SpatiaLight's LCOS Microdisplays

  • Shin, Dong-Soo;Sun, Raymond;Jin, Michael
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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    • pp.951-954
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    • 2004
  • We report the recent reliability test results of SpatiaLight's liquid crystal on Silicon (LCOS) microdisplays. Two different types of reliability tests have been performed: 1) thermal and 2) thermal with high intensity UV light. Various important device parameters were regularly monitored including the contrast ratio, color uniformity, and switching time. The test data shows that there are no degradations that fail the pass criteria. Lifetime estimations are given from the test data.

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