The main purpose of this paper is to extend the Zolotarev's problem concerning with geometric random sums to negative binomial random sums of independent identically distributed random variables.This extension is ...The main purpose of this paper is to extend the Zolotarev's problem concerning with geometric random sums to negative binomial random sums of independent identically distributed random variables.This extension is equivalent to describing all negative binomial infinitely divisible random variables and related results.Using Trotter-operator technique together with Zolotarev-distance's ideality,some upper bounds of convergence rates of normalized negative binomial random sums(in the sense of convergence in distribution)to Gamma,generalized Laplace and generalized Linnik random variables are established.The obtained results are extension and generalization of several known results related to geometric random sums.展开更多
The maximum of k numerical functions defined on , , by , ??is used here in Statistical classification. Previously, it has been used in Statistical Discrimination [1] and in Clustering [2]. We present first some theore...The maximum of k numerical functions defined on , , by , ??is used here in Statistical classification. Previously, it has been used in Statistical Discrimination [1] and in Clustering [2]. We present first some theoretical results on this function, and then its application in classification using a computer program we have developed. This approach leads to clear decisions, even in cases where the extension to several classes of Fisher’s linear discriminant function fails to be effective.展开更多
Quality assurance(QA)has been introduced and developed into Vietnam for almost 15 years.The importation of such a concept from other countries with different cultures may result in resistance in some ways.This study e...Quality assurance(QA)has been introduced and developed into Vietnam for almost 15 years.The importation of such a concept from other countries with different cultures may result in resistance in some ways.This study explores QA arrangements at three institutions of higher education(HE)in Vietnam,a Confucian heritage country,as perceived by academic leaders,QA practitioners,and academics to respond to QA policies from the government.The methodological approach taken in this research is a multiple case study.A qualitative approach was used to explore QA practices at three institutions.Data collected from documentation and in-depth interviews were analyzed for patterns and themes.It was found that centralism and large power distance of a Confucian collectivist country such as Vietnam significantly influenced the government’s attempts to reform HE for quality improvement.Culturally appropriate measures from the bottom level with long-term strategies should be considered to assure and improve quality,including the shift to decentralization in HE.展开更多
文摘The main purpose of this paper is to extend the Zolotarev's problem concerning with geometric random sums to negative binomial random sums of independent identically distributed random variables.This extension is equivalent to describing all negative binomial infinitely divisible random variables and related results.Using Trotter-operator technique together with Zolotarev-distance's ideality,some upper bounds of convergence rates of normalized negative binomial random sums(in the sense of convergence in distribution)to Gamma,generalized Laplace and generalized Linnik random variables are established.The obtained results are extension and generalization of several known results related to geometric random sums.
文摘The maximum of k numerical functions defined on , , by , ??is used here in Statistical classification. Previously, it has been used in Statistical Discrimination [1] and in Clustering [2]. We present first some theoretical results on this function, and then its application in classification using a computer program we have developed. This approach leads to clear decisions, even in cases where the extension to several classes of Fisher’s linear discriminant function fails to be effective.
文摘Quality assurance(QA)has been introduced and developed into Vietnam for almost 15 years.The importation of such a concept from other countries with different cultures may result in resistance in some ways.This study explores QA arrangements at three institutions of higher education(HE)in Vietnam,a Confucian heritage country,as perceived by academic leaders,QA practitioners,and academics to respond to QA policies from the government.The methodological approach taken in this research is a multiple case study.A qualitative approach was used to explore QA practices at three institutions.Data collected from documentation and in-depth interviews were analyzed for patterns and themes.It was found that centralism and large power distance of a Confucian collectivist country such as Vietnam significantly influenced the government’s attempts to reform HE for quality improvement.Culturally appropriate measures from the bottom level with long-term strategies should be considered to assure and improve quality,including the shift to decentralization in HE.
