The main generation methods consist of mixed congruencemethod, inverse transform method, function transform method and refuse-accept method, which are illustrated by means of giving several examples.
In this paper, based on the relation between normal subgroup and congruence, another depiction of normal series power semigroup is given from the angles of congruence by the method of analogy.
The ray trace and the illuminance calculation method of the CAD system is analyzed. And the linear congruence generator is introduced in the calculation, which improves the emulation reliability.