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- B HENGJIAN CUI, XUMING HE, KAI W. NG
- 2003

S Algebraically, principal components can be defined as the eigenvalues and eigenvectors of a covariance or correlation matrix, but they are statistically meaningful as successive projections of the multivariate data in the direction of maximal variability. An attractive alternative in robust principal component analysis is to replace the classical… (More)

- Wai Man Tse, Leong Kwan Li, Kai Wang Ng
- Management Science
- 2001

- Anyue Chen, Junping Li, Zhenting Hou, Kai Wang Ng
- Queueing Syst.
- 2010

- Yiqing Chen, Kam C. Yuen, Kai W. Ng
- 2010

The study of precise large deviations for random sums is an important topic in insurance and finance. In this paper, we extend recent results of Tang (2006) and Liu (2009) to random sums in various situations. In particular, we establish a precise large deviation result for a nonstandard renewal risk model in which innovations, modelled as real-valued… (More)

In this paper we consider the probabilities of …nite-and in…nite-time absolute ruin in the renewal risk model with constant premium rate and constant force of interest. In the particular case of compound Poisson model, explicit asymptotic expressions for the …nite-and in…nite-time absolute ruin probabilities are given. For the general renewal risk model, we… (More)

- Guo-Liang Tian, Man-Lai Tang, Kam Chuen Yuen, Kai Wang Ng
- Computational Statistics & Data Analysis
- 2010

- Guo-Liang Tian, Kai Wang Ng, Ming Tan
- Computational Statistics & Data Analysis
- 2008

- Kai Wang Ng, Howell Tong
- 2011

By inverting the Bayes formula in a point-wise manner, we develop measures quantifying the information gained by the Bayesian process, in reference to the Fisher information. Simple examples are used for focused illustrations of the ideas. Numerical computation for the measures is discussed with formulae. By extending the information gain concept to the… (More)

- Kai Wang Ng
- International Encyclopedia of Statistical Science
- 2011

} be two distinct partitions of the sample space, or equivalently two sets of events satisfying three properties: (i) each event is non-void, (ii) events in the same set are mutually exclusive (i.e. P (H j ∪ H k) = P (H j) + P (H k) for j = k), and (iii) each set is collectively exhaustive, (i.e. P (∪ m i=1 H j) = 1). The Bayes formula in general form is,

- Guo-Liang Tian, Kai Wang Ng, Kai-Can Li, Ming Tan
- Computational Statistics & Data Analysis
- 2009

Diarrhoea-associated Haemolytic uraemic syndrome (HUS) is a disease that affects the kidneys and other organs. Motivated by the annual number of cases of HUS collected in Birmingham and Newcastle of England, respectively, from 1970 to 1989, we consider Bayesian changepoint analysis with specific attention to Poisson changepoint models. For changepoint… (More)