• Title, Summary, Keyword: uniform distribution

Search Result 2,225, Processing Time 0.043 seconds

Estimations in a skewed uniform distribution

  • Son, Hee-Ju;Woo, Jung-Soo
    • Journal of the Korean Data and Information Science Society
    • /
    • v.20 no.4
    • /
    • pp.733-740
    • /
    • 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.

  • PDF

The effects of non-uniform droplets distribution on the characteristics of group combustion for liquid fuel droplets cloud (비균일 액적분포가 액적군의 집단연소 특성에 미치는 영향)

  • 김호영;전철균
    • Transactions of the Korean Society of Mechanical Engineers
    • /
    • v.11 no.3
    • /
    • pp.479-487
    • /
    • 1987
  • In order to predict the effects of droplets distributions such as number density and droplets size on group combustion characteristics and flame structure for liquid fuel sprays, modifications of group combustions model were made by changing the droplets distributions from uniform to non-uniform. Various droplets distribution models were adopted in this analysis to examine the effect of number density distribution on combustion characteristics and the difference between uniform and non-uniform droplets size distributions for a spherical droplets cloud. As results of present study, hollow droplets could with outer concentrating distribution has shorter total combustion time compare with the case of solid droplets cloud with inner concentrating distribution. Uniform droplets size distribution model predicts the shorter total combustion time compare with non-uniform droplets size distribution model, and the uniform droplets size distribution model may be used to predict the total combustion time for the droplets cloud containing larger initial size of droplets.

Estimations in a Generalized Uniform Distribution

  • Lee, Chang-Soo
    • Journal of the Korean Data and Information Science Society
    • /
    • v.11 no.2
    • /
    • pp.319-325
    • /
    • 2000
  • In this paper, we shall derive MLE's, modified MLE, MRE and UMVUE's of the shape and scale parameters in a generalized uniform distribution, and propose several estimators for the right-tail probability in a generalized uniform distribution using the proposed estimators for the shape and scale parameters. And we shall compare exactly MSE of the proposed estimators for the shape and the scale parameters, and compare numerically efficiencies for the several proposed estimators of the right-tail probability in a generalized uniform distribution by Monte Caslo methods.

  • PDF

Method of Making the Distribution of Voxels Uniform within the Volumetric 3D image Space

  • Lin, Yuanfang;Liu, Xu;Xie, Xiaoyan;Liu, Xiangdong;Li, Haifeng
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • /
    • pp.1138-1141
    • /
    • 2008
  • By defining a uniform reference point array corresponding to the 3D voxel array and abandoning voxels whose deviations from their respective reference points exceed a given tolerance, the distribution of voxels within the volumetric 3D image space gets uniform, effects of non-uniform distribution upon the image reconstructing are eased.

  • PDF

Computer Simulation Study of the Thermoelectric Cooling by Hybrid Method (하이브리드법을 이용한 열전냉각의 수치해석 연구)

  • Kim, N.J.;Lee, J.Y.;Kim, C.B.
    • Solar Energy
    • /
    • v.20 no.1
    • /
    • pp.97-108
    • /
    • 2000
  • The purpose of this study is to minimize the heat transfer surface area and cold fluid exit temperature of heat exchanger which applied to the refrigeration and air-conditioning system by utilizing the thermoelectric principle. Both uniform and non-uniform current distribution methods which applied to the analysis of the TE elements that incorporates heat exchanger were investigated. The non-uniform current distribution method had the better coefficient of performance and had the lower cold fluid exit temperature of the TE cooling system than the uniform current distribution method. It was found that if a TE cooling system incorporates a heat exchanger, a non-uniform current distribution should guarantee to the lowest cold fluid exit temperature. Also, the hybrid method (combination of the uniform and non-uniform current distribution method) is investigated to achieve the best results by combining the uniform and non-uniform current distributions. The results show that it can lower the cold fluid exit temperature and reduce the heat transfer surface area for the parallel flow arrangement if we apply the constant current in some entry region and the non-uniform increasing current in the direction of the cold fluid flow afterwards.

  • PDF

GENERALIZED CONVOLUTION OF UNIFORM DISTRIBUTIONS

  • Kang, Jong-Seong;Kim, Sung-Lai;Kim, Yang-Hee;Jang, Yu-Seon
    • Journal of applied mathematics & informatics
    • /
    • v.28 no.5_6
    • /
    • pp.1573-1581
    • /
    • 2010
  • we investigate the n-fold convolution of the uniform distributions. First, we are concerned with the explicit distribution function of the partial sum ${\zeta}_n$ when the random variables are independent and has identically uniform distribution, next, we determine the n-fold convolution distribution of ${\zeta}_n$ when the identically distributed condition is not satisfied.

Reliability in Two Independent Uniform and Power Function-Half Normal Distribution

  • Woo, Jung-Soo
    • Communications for Statistical Applications and Methods
    • /
    • v.15 no.3
    • /
    • pp.325-332
    • /
    • 2008
  • We consider estimation of reliability P(Y < X) and distribution of the ratio when X and Y are independent uniform random variable and power function random variable, respectively and also consider the estimation problem when X and Y are independent uniform random variable and a half-normal random variable, respectively.

A Lattice Distribution

  • Chung, Han-Young
    • Journal of the Korean Statistical Society
    • /
    • v.10
    • /
    • pp.97-104
    • /
    • 1981
  • It is shown that a lattice distribution defined on a set of n lattice points $L(n,\delta) = {\delta,\delta+1,...,\delta+n-1}$ is a distribution induced from the distribution of convolution of independently and identically distributed (i.i.d.) uniform [0,1] random variables. Also the m-th moment of the lattice distribution is obtained in a quite different approach from Park and Chung (1978). It is verified that the distribution of the sum of n i.i.d. uniform [0,1] random variables is completely determined by the lattice distribution on $L(n,\delta)$ and the uniform distribution on [0,1]. The factorial mement generating function, factorial moments, and moments are also obtained.

  • PDF

A Case Study on Uniform Design Development -Focused on F Distribution Enterprise- (기업의 유니폼 디자인 개발 연구 -F 유통업체 사례를 중심으로-)

  • Kim Zang-Mi;Park Hye-Won
    • Journal of the Korean Society of Costume
    • /
    • v.56 no.5
    • /
    • pp.75-88
    • /
    • 2006
  • The conception of uniform is changing from function and economical efficiency of the past to symbolism and aesthetic sense So, in such a management strategical point of view as enterprises' PR, scouting talent, organization revitalization etc, this is required to settle uniform culture which is proper to each enterprise and design development. The purpose of this thesis is, first, to study to help distribution enterprises' CI or PR by examining the present condition of uniform design in domestic fashion distribution enterprise and planning uniform design on the base of real case and finally making a real thing in person. Second is to suggest to fashion enterprise security of competitive ability of uniform-producing enterprise by developing article design of worth. Third is to present academic area with how to do design education in a wide range not based on trend article development. Following is how and what to study to carry out these purposes. Details about necessity and how and what to study are in an introduction, the conception of uniform in theory through precedential records examination in chapter 2, the present condition of uniform design based on Changwon city in chapter 3, planning uniform design and making a real thing suitable for F enterprise in chapter 4, and the conclusion is in chapter 5. Through this study, I became to know that uniform in distribution enterprise who treats visitors face to face is very important. I supply material and information concluded from this study to uniform industry and hope this will be helpful in developing uniform. It is significant in that this study as being related with enlarged uniform and enterprise, beyond such a uniform area as school uniform and hospital one, expanded the study range of clothing. I already tell you that this study is based on visual expression of uniform and wearer's feeling in clothes is not included.