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Optimization of Industrial Wastewater Treatment Using Intuitionistic Fuzzy Goal Geometric Programming Problem
Tsinghua University Press - Tập 8 - Trang 329-343 - 2016
On the lattice of stratified principal L-topologies
Tsinghua University Press - Tập 5 - Trang 351-358 - 2013
We investigate the lattice structure of the set of all stratified principal L-topologies on a given set X. It proves that the lattice of stratified principal L-topologies S p(X) has atoms and dual atoms if and only if L has atoms and dual atoms respectively. Moreover, it is complete and semi-complemented. We also discuss some other properties of the lattice.
Weighted portfolio selection models based on possibility theory
Tsinghua University Press - Tập 1 - Trang 115-127 - 2009
In this paper, we discuss portfolio selection problem in a fuzzy uncertain environment. Based on the Fullér’s and Zhang’s notations, we discuss some properties of weighted lower and upper possibilistic means and variances as in probability theory. We further present two weighted possibilistic portfolio selection models with bounded constraint, which can be transformed to linear programming problem......
Optimal selection of a landfill disposal site using a modified fuzzy utility approach
Tsinghua University Press - Tập 4 - Trang 313-338 - 2012
The present paper develops an integrated fuzzy based model to select an optimal landfill site among the given alternative sites by using the concept of fuzzyutility method and multi-nomial logit theory. The suitability of different landfill sites are evaluated based on some important criteria involved in the process such as accessibility and transportation; environmental, geological and climatic c......
Environmental risk modelling under probability-normal interval-valued fuzzy number
Tsinghua University Press - Tập 5 - Trang 359-371 - 2013
In almost all the realistic circumstances, such as health risk assessment and uncertainty analysis of atmospheric dispersion, it is very essential to include all the information into modelling. The parameters associated to a particular model may include different kind of variability, imprecision and uncertainty. More often, it is seen that available informations are interpreted in probabilistic se......
Fuzzy Asymptotic Expansions of Meyer-König and Zeller Operators
Tsinghua University Press - Tập 7 - Trang 499-506 - 2015
β-compactness in L-fuzzy topological spaces
Tsinghua University Press - Tập 2 - Trang 283-292 - 2010
In this paper, β-compactness is introduced in L-topological spaces, where L is a fuzzy lattice. And its topological properties are systematically studied. This β-compactness is defined for arbitrary L-subsets. The intersection of a β-compact L-fuzzy subset and a β-closed L-fuzzy subset is β-compact with a good extension. Also different characterizations are obtained and some of its properties are ......
Centrality Measures in Directed Fuzzy Social Networks
Tsinghua University Press - Tập 7 - Trang 115-128 - 2015
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