The color diagnosis is to observe the changes of patient’s facial features and can be a diagnostic method understand condition. theory technology TCM are self-contained have accumulated rich experience in about 2000 years. However, it still visual description inspection expression language. It influenced by amount doctor’s language ability. has strong subjectivity poor clarity.

In this paper, a maximum likelihood estimation and a minimum entropy estimation for the expected value and variance of normal fuzzy variable are discussed within the framework of credibility theory. As an application, a credibilistic portfolio selection model is proposed, which is an improvement over the traditional models as it only needs the predicted values on the security returns instead of...