The studies on symmetries and exact invariants (conserved quantities) play a very important role in mechanics and physics.

Comparisons and relationships among uncertainty variables

A new method with uncertain linguistic variable of the attribute weights and attribute values based on the ULWM operator and ULHA operator is used to evaluation the reliability of colliery machine.

For the chosen of index system of the university library website evaluation,using uncertain linguistic geometric mean(ULGM) operator to present every index of uncertain linguistic variable result basing on the result of questionnaire investigation.

In this paper,we study the multiple attribute decision making problems,in which the information about attribute weights is partly known and the attribute values take the form of linguistic variables or uncertain linguistic variables,and the decision maker has preferences on alternatives.

Studied was multiple attribute decision making,in which the information about attribute weights is unknown completely and the attribute values and preference information on alternatives take the form of uncertain linguistic variables.

A TOPSIS method is proposed to deal with multiple attribute decision-making [MADM] problems with attribute weights unknown completely and the attribute values taken the form of uncertain linguistic variables.