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Shouquan Chen,Geng Zhang 한국통계학회 2012 Journal of the Korean Statistical Society Vol.41 No.4
Let {Xn, n ≥ 1} be a sequence of d-dimensional stationary Gaussian vectors, and let Mn denote the maxima of {Xk, 1 ≤ k ≤ n}. Suppose that there are missing data in each component of Xk and let Mn denote the maxima of the observed variables. In this paper,we study the asymptotic distribution of the random vector (Mn,Mn) as the correlation and cross-correlation satisfy strongly dependent conditions.
Rates of convergence of extreme for STSD under power normalization
Shouquan Chen,Bo Feng 한국통계학회 2014 Journal of the Korean Statistical Society Vol.43 No.4
By using the theory of p-max stable laws,we study the rates of convergence of extremes forSTSD under power normalization. In this paper we derive the exact uniform convergencerate of the distribution of the maximum to its extreme value limit.
Osteopontin enhances sperm capacitation and in vitro fertilization efficiency in boars
( Yun Chen ),( Kai Wang ),( Shouquan Zhang ) 한국축산학회 2022 한국축산학회지 Vol.64 No.2
In this study, we used more reliable experimental materials and methods to detect the effects of osteopontin (OPN) on boar sperm in vitro capacitation, acrosome reaction, and fertilization efficiency. We reorganized and obtained the OPN protein of the porcine source. Immunofluorescence and Western blot show the localization and expression of the OPN protein before and after sperm capacitation. To determine whether OPN can affect sperm during sperm capacitation, we examined cyclic adenosine monophosphate (cAMP) concentrations after sperm capacitation, and the results showed that OPN significantly increased the cAMP concentration in sperm (p < 0.05). Flow cytometry showed that 0.1 μg/mL OPN-treated sperm had better acrosome reaction ability. In vitro fertilization (IVF) showed that 0.1 μg/mL OPN significantly increased the rate of embryo division. In conclusion, this study found that 0.1 μg/mL porcine OPN protein can significantly improve porcine capacitated sperm motility, cAMP concentration after capacitation sperm, acrosome reaction ability, and embryo division during IVF and provides new clues to explore the mechanism of OPN’s function on sperm.
Zhang, Geng,Chen, Shouquan 한국통계학회 2012 Journal of the Korean Statistical Society Vol.41 No.4
Let {$X_n$, $n{\geq}1$} be a sequence of d-dimensional stationary Gaussian vectors, and let $M_n$ denote the maxima of {$X_k$, $1{\leq}k{\leq}n$}. Suppose that there are missing data in each component of $X_k$ and let $\tilde{M}_n$ denote the maxima of the observed variables. In this paper, we study the asymptotic distribution of the random vector ($\tilde{M}_n$, $M_n$) as the correlation and cross-correlation satisfy strongly dependent conditions.
Lingling Du,Shouquan Chen 한국통계학회 2016 Journal of the Korean Statistical Society Vol.45 No.2
For a generalized gamma random sequence, some fundamental properties and convergence rates of the distribution of its partial maximum to the Gumbel extreme value distribution are derived. The asymptotic expansions for the distribution and density of maximum from generalized gamma distribution are given under an optimal choice of normalizing constants.