Algorithm of Word-Lattice Parsing Based on Improved CYK-Algorithm

Abstract

Through thoroughly researching on CYK-algorithm (Cocke-Younger-Kasami) parsing to normal sentence, especially on generating algorithm about initial CYK-table of word-lattice structure, and improving CYK-algorithm by regarding the span of time sequence of word-lattice transformed as the attribute, a kind of word-lattice parsing algorithm based on improved CYK-algorithm is proposed in the paper. Based on initial CYK-table of word-lattice distorted, continue parsing through software algorithm design without changing the structure or the data of CYK-table, according the program structure, a mixed structure model is put forward. At last, the feasibility, running progress and running result of the algorithm is illustrated by an instance, consistent with the theoretical analysis.