This paper defines latter component s reduction of a pair of families of equivalent relations, reduction of a pair of families of equivalent relations, decision attribute reduction of a decision table, attribute reduction of a decision table.

The spanning space of measurable space and the equivalence relation;

Matrix Discriminance and computer algorithm for equivalence relation

This chapter mostly tells the rough set model under equivalence relation,common relation and probability,gives their definition property and respective kinds of definition type,the relationship between them,and examples.

If we analyze the problem from such angles as theory and reality, we will find out that the traditional view of value unilaterally emphasizes man's leading role so much that it has caused the imbalance of value relationship between man and nature.

To clarify the value relationship between higher education self - study examination and full - time general higher education is a great help to the mutual complement of their advantages, so as to accelerate our higher education.

Value system of educational policy is constituted of value elements of policy activities and their relationships, including value subjects of educational policy, value objects of educational policy, educational policy problems and value relationships of educational policy.