• 제목/요약/키워드: Exponential Type

검색결과 426건 처리시간 0.03초

FIR 필터의 지수창 함수에 관한 연구 (Exponential Window Function of FTR Filter)

  • 이정재;한영렬;하진구
    • 한국통신학회:학술대회논문집
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    • 한국통신학회 1983년도 추계학술발표회논문집
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    • pp.61-64
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    • 1983
  • It is shown that the new window function of Exponential type can be derived from Cheby-chev Identity for the design of FIR filter, and the various kinds of windows which have different characterristics can also be made by changing the coefficients of them oasily

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Exponential Asymptotic Stability in Perturbed Systems

  • Choi, Sung Kyu;Choi, Cheong Song
    • 충청수학회지
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    • 제3권1호
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    • pp.69-81
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    • 1990
  • In this paper we investigate the problem of exponential asymptotic stability (EAS) in perturbed nonlinear systems of the differential system x' = f(t, x). Also, a simple method for constructing Liapunov functions is used to prove a kind of Massera type converse theorem.

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Intrinsic Bayes Factors for Exponential Model Comparison with Censored Data

  • Kim, Dal-Ho;Kang, Sang-Gil;Kim, Seong W.
    • Journal of the Korean Statistical Society
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    • 제29권1호
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    • pp.123-135
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    • 2000
  • This paper addresses the Bayesian hypotheses testing for the comparison of exponential population under type II censoring. In Bayesian testing problem, conventional Bayes factors can not typically accommodate the use of noninformative priors which are improper and are defined only up to arbitrary constants. To overcome such problem, we use the recently proposed hypotheses testing criterion called the intrinsic Bayes factor. We derive the arithmetic, expected and median intrinsic Bayes factors for our problem. The Monte Carlo simulation is used for calculating intrinsic Bayes factors which are compared with P-values of the classical test.

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Optimal step stress accelerated life tests for the exponential distribution under periodic inspection and type I censoring

  • Moon, Gyoung-Ae;Park, Yong-Kil
    • Journal of the Korean Data and Information Science Society
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    • 제20권6호
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    • pp.1169-1175
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    • 2009
  • In this paper, the inferences of data obtained from periodic inspection and type I censoring for the step-stress accelerated life test are studied. The exponential distribution with a failure rate function that a log-linear function of stress and the tampered failure rate model are considered. The maximum likelihood estimators of the model parameters are estimated and also the optimal stress change time which minimize the asymptotic variance of maximum likelihood estimators of parameters is determined. A numerical example will be given to illustrate the proposed inferential procedures and the sensitivity of the asymptotic variance of the estimated mean by the guessed parameters is investigated.

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Optimal designing of skip lot sampling plan of type SkSP-2 with double sampling plan as the reference plan under generalized exponential distribution

  • Suresh, K.K.;Kavithamani, M.
    • International Journal of Reliability and Applications
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    • 제15권2호
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    • pp.77-84
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    • 2014
  • In this paper, a optimal designing methodology is proposed to determine the parameters for skip-lot sampling plan of type SkSP-2 plan with double sampling plan as reference plan, when the lifetime of the product follows generalized exponential distribution. The two points on the operating characteristic curve approach are used to find the optimal parameters for the proposed plan. The plan parameters are determined so as to minimize the average sample number subject to satisfying simultaneously both producer and consumer risks at the acceptable and limiting quality levels respectively.

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지수모형의 제한된 대체 효과에 관한 연구 (A study on effects of limited replacements in exponential model)

  • 조길호
    • Journal of the Korean Data and Information Science Society
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    • 제24권3호
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    • pp.445-451
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    • 2013
  • 시간 중도 절단된 지수모형에서 고장이 일어나는 즉시 고장 난 부품들을 새로운 부품들로 대체시키는 방법을 고려하였다. 이때 대체 가능한 개수를 제한하는 조건하에서 부품들의 수명분포가 모두 같은 경우와 모두 같지 않은 일반적인 경우에 대한 모수의 최우추정량을 구하였다. 그리고 모의실험을 통해 대체 가능한 개수를 제한한 경우의 모수에 대한 최우추정량과, 대체개수를 제한하지 않은 경우의 모수에 대한 최우추정량을 평균제곱오차의 관점에서 비교하고, 그 차이가 미세하게 되는 제한된 대체 개수를 제시하였다.

Independent Testing in Marshall and Olkin's Bivariate Exponential Model Using Fractional Bayes Factor Under Bivariate Type I Censorship

  • Cho, Kil-Ho;Cho, Jang-Sik;Choi, Seung-Bae
    • Journal of the Korean Data and Information Science Society
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    • 제19권4호
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    • pp.1391-1396
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    • 2008
  • In this paper, we consider two components system which the lifetimes have Marshall and Olkin's bivariate exponential model with bivariate type I censored data. We propose a Bayesian independent test procedure for above model using fractional Bayes factor method by O'Hagan based on improper prior distributions. And we compute the fractional Bayes factor and the posterior probabilities for the hypotheses, respectively. Also we select a hypothesis which has the largest posterior probability. Finally a numerical example is given to illustrate our Bayesian testing procedure.

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N-point modified exponential model for household projections in Korea using multi-point register-based census data

  • Saebom Jeon;Tae Yeon Kwon
    • Communications for Statistical Applications and Methods
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    • 제31권4호
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    • pp.377-391
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    • 2024
  • Accurate household projections are essential for sectors such as housing supply and tax policy planning, given the rapid social changes like declining birthrates, an aging population, and a rise in single-person households that impact household size and type. Korea introduced its first register-based census in 2015, transitioning from five-year general survey-based approach to an annual administrative data-based census. This change in census allows for more frequent and effective capturing the rapid demographic shifts and trends. However, this change in census has caused challenges in future projection by the existing household projection model due to the rapid dynamics. This paper proposes a new household projection method, the N-point Modified Exponential Model (MEM), that accurately reflects register-based census data and mitigates the impact of rapid demographic changes, in three types: the Weighted N-point MEM, the Regression-based N-point MEM, and the Rolling Weighted N+point MEM. Using register-based census data from 2016 to 2020 to forecast household headship rates by age, household size, and household type to 2051, the N-point modified exponential model outperformed the existing model in both long- and short-term forecast accuracy, suggesting its suitability as a future household projection model for Korea.

Transformation of Surface Brightness Profile Types of Dwarf Galaxies : KMTNet Supernova Program Data

  • Lee, Youngdae;Park, Hong Soo;Kim, Sang Chul;Moon, Dae-Sik;Lee, Jae-Joon;Kim, Dong-Jin;Cha, Sang-Mok
    • 천문학회보
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    • 제43권1호
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    • pp.42.3-42.3
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    • 2018
  • We investigate surface brightness profiles (SBPs) of dwarf galaxies in field, group, and cluster environments. Using images from the Korea Microlensing Telescope Network (KMTNet) Supernova Program (KSP) for the NGC 2784 group and SDSS for the Virgo cluster, SBP types are classified into profiles with single exponential (Type I), double exponential (Type II and Type III). Type II and Type III have smaller and larger outer sizes than inner sizes, respectively. SBP types of field dwarfs are compiled from a previous study. The distributions of SBP types are different in three environments. After comparing sizes of dwarfs in different environments, we suggest that since sizes of some dwarfs are changed due to the environmental effects, SBP types are able to be transformed. It makes that the distributions of SBP types in three environments are different.

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