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- Hung T. Nguyen, Nhu T. Nguyen, Tonghui Wang
- International Journal of Uncertainty, Fuzziness…
- 1997

- Tonghui Wang, Baokun Li, Arjun K. Gupta
- J. Multivariate Analysis
- 2009

Not all the knowledge comes from measurements and observations. In many real-life situations, in addition to the results of measurements and observations, we have expert estimates, estimates that are often formulated in terms of natural language, like “ is large”. It is therefore necessary to extend traditional statistical techniques to the case when some… (More)

Poverty measures are used to measure poverty levels or degrees of poverty in a population. Stochastic dominance refers to a set of relations between distributions. Stochastic dominance orders of poverty measures have been discussed by many authors in the literature. In this paper, definition of stochastic dominance is introduced and used to order poverty… (More)

Poverty measures are used to measure poverty levels or degrees of poverty in a population. In this paper, we investigate the estimation of poverty measures using truncated log-normal, truncated gamma, and truncated epsilonskew-normal distributions. For comparisons and illustrations, our results are applied to the real data sets collected in Egypt between… (More)

- Komsan Suriya, Tatcha Sudtasan, Tonghui Wang, Octavio Lerma, Vladik Kreinovich
- 2014

In this paper, we propose a natural model describing competition between two research groups of the same average research strength. The analysis of this model enables us to conclude that a more diverse group has an advantage: namely, the more diverse the group, the higher the average quality of its publications.

- Hung T. Nguyen, Tonghui Wang, Berlin Wu
- Int. J. Intell. Syst.
- 2004

By Fuzzy theory we mean Zadeh’s mathematical theory of generalized sets and their associated logics. At this state of the art, fuzzy theory has provided significant contributions to artificial intelligence via a broader umbrella of soft computing. Like other theories of mathematics, such as number theory and potential theory, fuzzy theory has its own… (More)

Let μ be a self-similar measure on R generated by an equicontractive iterated function system. We prove that the Hausdorff dimension of μ∗n tends to 1 as n tends to infinity, where μ∗n denotes the n-fold convolution of μ. Similar results hold for the Lq dimension and the entropy dimension of μ∗n.

- Komsan Suriya, Tatcha Sudtasan, Tonghui Wang, Octavio Lerma, Vladik Kreinovich
- 2015

In many practical situations, we have probability distributions which are close to normal but skewed. Several families of distributions were proposed to describe such phenomena. The most widely used is skew-normal distribution, whose probability density (pdf) is equal to the product of the pdf of a normal distribution and a cumulative distribution function… (More)

- John Harding, Massimo Marinacci, Nhu T. Nguyen, Tonghui Wang
- International Journal of Uncertainty, Fuzziness…
- 1997