Study on the similarity of NC instructions based on theory of similarity

Based on theory of similarity,analyze the similarity,similarity units and similarity degree at multi-levels from system of similarity standpoint between different NC systems.According to partitioning principles of similarity units,define the similarity units in all-levels and quantify their eigenvalues and attribute values.Give the mathematical model to compute the similarity degree of NC instructions.Define the deterministic similitude and fuzzy similitude of NC instructions,which provide the foundation for the translation of NC instructions between different NC systems.