For group multi-criteria clustering problems with linguistic assessment information,a new method is proposed,in which the decision-makers weights are incomplete certain,and so are criteria weights.

As concerning group multi-criteria assignment problem with linguistic assessment information,a new method is proposed,in which the decision-makers weights are uncertain,and so are criteria weights.

Then,the discrete linguistic evaluation set is extended to continuous space.

The difference in the form of expression between languages lie in linguistic structure,and have connection with specified society and culture The following is aimed at the mutual connection between language and cultural elements such as national trait, form of thought and linguistic psychology, combining a mount of linguistic materials, which reveals the essence of refusing manifest.

Seemingly these functions are quite irrelevant,while from the aspects of culture background,linguistic psychology and language competence,they are closely related.

Setting out from phylogeny of mental language and being based on analytical philosophy.

Fodor regards the complexity and formation of thoughts, the systematization of language understanding and proofs of introspection as the basic reasons of the existence of mental language.

Zweig s using mental language in his works is a great success.