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Traditional process capability indices require that quality characteristics follow normal distribution. But in the actual production processes, quality characteristic usually has a non-normal distribution and almost all the production processes exhibit the between batch variability besides the within batch variability. This paper proposed confidence intervals for process capability indices for log-normal...
This paper discusses the VaRU minimization portfolio selection problem assuming that the return rates of risky securities are uncertain variables. Considering the realistic financial market, we propose a new model which adds the integer constraint of the transaction lot. Then the crisp form of the model is given. In the meanwhile, a revised branch-and-bound method is introduced in the paper. Finally,...
This paper discusses the uncertain portfolio selection problem for the insurer. A new model is proposed assuming that the return rates of risky securities are uncertain variables. Then the crisp forms of the model are given. Finally, each result of two numerical examples shows the application of the model.
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