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Sang-eon Park

Yonsei University · 数学

研究室紹介

Professor Sang-eon Park's research lab specializes in statistical inference, particularly in the areas of entropy estimation, Fisher information in order statistics, and goodness-of-fit testing. The lab focuses on developing nonparametric and information-theoretic methods for statistical inference, with an emphasis on censored data and distribution-free approaches. Key contributions include the derivation of distribution functions for sample entropy, recurrence relations for Fisher information, and the development of censored Kullback-Leibler information for robust goodness-of-fit testing.

entropy estimationFisher informationorder statisticsgoodness-of-fit testingcensored data

Research Overview

Papers
85
Total Citations
1,067
Papers (5y)
10
Primary Field
数学

Research Output Trend

Figures are computed from collected data and may differ slightly.

Publications per year (5y)
10total
2020
2021
2022
2024
2025
Citations per year (5y)
19total
20202021202220242025

Selected Papers

15
1
Article|79 citations·1995
The entropy of consecutive order statistics
Sangun Park
SJR Q1IEEE Transactions on Information Theory

Calculation of the entropy of a set of consecutive order statistics is relatively more complicated than that of the entropy of the individual order statistic, which has been studied by Wong and Chan (1990). We provide some fundamental relations occurring in the entropy of consecutive-order statistics, which are very useful for computations. We first consider the decomposition of the entropy of order statistics, and derive some recurrence relations in the first r order statistics. We also establi

Statistics and ProbabilityMathematics
2
Article|76 citations·2012
On cumulative residual Kullback–Leibler information
Sangun Park, Murali Rao, Dong Wan Shin
SJR Q2Statistics & Probability Letters
Statistics and ProbabilityMathematics
3
Article|61 citations·2003
Correcting moments for goodness of fit tests based on two entropy estimates
Sangun Park, Dongryeon Park
SJR Q2Journal of Statistical Computation and Simulation

The sample entropy (Vasicek, 1976) has been most widely used as a nonparametric entropy estimator due to its simplicity, but its underlying distribution function has not been known yet though its moments are required in establishing the entropy-based goodness of test statistic (Soofi et al., 1995). In this paper we derive the nonparametric distribution function of the sample entropy as a piece-wise uniform distribution in the lights of Theil (1980) and Dudwicz and van der Meulen (1987). Then we

Statistics and ProbabilityMathematics
4
Article|61 citations·1996
Fisher Information in Order Statistics
Sangun Park
SJR Q1Journal of the American Statistical Association

Abstract When we have n independently and identically distributed observations, it is an interesting question how the Fisher information is distributed among order statistics. The recipe for the Fisher information in order statistics is easy, but the detailed calculation has been known to be complicated. An indirect approach, using a decomposition of the Fisher information in order statistics, simplifies the calculation. Some recurrence relations for the Fisher information in order statistics ar

Statistics and ProbabilityMathematics
5
Article|39 citations·2009
On simple calculation of the Fisher information in hybrid censoring schemes
Sangun Park, N. Balakrishnan
SJR Q2Statistics & Probability Letters
Statistics and ProbabilityMathematics
6
Article|36 citations·1999
A goodness-of-fit test for normality based on the sample entropy of order statistics
Sangun Park
SJR Q2Statistics & Probability Letters
Statistics and ProbabilityMathematics
7
Article|32 citations·2003
On the asymptotic Fisher information in order statistics
Sangun Park
SJR Q2Metrika
Statistics and ProbabilityMathematics
8
Article|30 citations·2008
Fisher information in hybrid censored data
Sangun Park, N. Balakrishnan, Gang Zheng
SJR Q2Statistics & Probability Letters
Statistics and ProbabilityMathematics
9
Article|27 citations·2007
Censored Kullback-Leibler Information and Goodness-of-Fit Test with Type II Censored Data
Jonggun Lim, Sangun Park
SJR Q2Journal of Applied Statistics

The Kulback-Leibler information has been considered for establishing goodness-of-fit test statistics, which have been shown to perform very well (Arizono & Ohta, 1989; Ebrahimi et al., 1992, etc). In this paper, we propose censored Kullback-Leibler information to generalize the discussion of the Kullback-Leibler information to the censored case. Then we establish a goodness-of-fit test statistic based on the censored Kullback-Leibler information with the type 2 censored data, and compare the tes

Statistics and ProbabilityMathematics
10
Article|21 citations·2007
Agent based intelligent search framework for product information using ontology mapping
Wooju Kim, Dae Woo Choi, Sangun Park
SJR Q2Journal of Intelligent Information Systems
Information SystemsComputer Science
11
Article|20 citations·2013
Kullback–Leibler information of a censored variable and its applications
Sangun Park, Minsuk Shin
SJR Q3Statistics

In this paper, we study the Kullback–Leibler (KL) information of a censored variable, which we will simply call it censored KL information. The censored KL information is shown to have the necessary monotonicity property in addition to inherent properties of nonnegativity and characterization. We also present a representation of the censored KL information in terms of the relative risk and study its relation with the Fisher information in censored data. Finally, we evaluate the estimated censore

Statistics and ProbabilityMathematics
12
Article|20 citations·1996
Fisher Information in Order Statistics
Sangun Park
SJR Q1Journal of the American Statistical Association

Abstract When we have n independently and identically distributed observations, it is an interesting question how the Fisher information is distributed among order statistics. The recipe for the Fisher information in order statistics is easy, but the detailed calculation has been known to be complicated. An indirect approach, using a decomposition of the Fisher information in order statistics, simplifies the calculation. Some recurrence relations for the Fisher information in order statistics ar

Artificial IntelligenceComputer Science
13
Article|19 citations·2015
Cumulative residual Kullback–Leibler information with the progressively Type-II censored data
Sangun Park, Reza Pakyari
SJR Q2Statistics & Probability Letters
Statistics and ProbabilityMathematics
14
Article|19 citations·2014
On censored cumulative residual Kullback–Leibler information and goodness-of-fit test with type II censored data
Sangun Park, Johan Lim
SJR Q2Statistical Papers
Statistics and ProbabilityMathematics
15
Article|18 citations·2011
A very flexible hybrid censoring scheme and its Fisher information
Sangun Park, N. Balakrishnan
SJR Q2Journal of Statistical Computation and Simulation

Various hybrid censoring schemes, which are mixtures of Type I and Type II censoring schemes, have been suggested for flexibility in termination time and efficiency level. In this paper, we propose a general hybrid censoring scheme to be a censoring scheme with Type I or Type II bounds which provides more flexible termination time and efficiency level. The Type I hybrid censoring scheme can be interpreted as a Type I censoring scheme with a Type II upper bound, while the generalized Type I hybri

Statistics and ProbabilityMathematics

Research Areas

Statistics and ProbabilityArtificial IntelligenceInformation SystemsStatistics, Probability and UncertaintyMolecular BiologyEnvironmental Engineering

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