Decision tree based on class feature matrix;

An extracting rules algorithm based on class feature matrix is presented,which has made use of the characteristic of discernibility matrix.

Based on fundamental theories of English phonetics and phonology,the paper gives a relatively comprehensive account of English consonant cluster s structure and phonetic features from the perspective of the definition,cause,and formulation of neutralization of English consonants as well as their distinctive features and oppositions.

The article approaches the issue from the perspective of iconicity in order to probe into the distinctive features of sexism in English language from different aspects: marked iconicity,number iconicity,order iconicity,range iconicity and metaphor iconicity,so as to reveal its social origin.

It is one of the important claims of phonological theory that all speech sounds are not indivisible wholes but can be decomposed into sets of distinctive features.

Their distinctive features are more complicated.

Based on investigating the various dialects of Jiangsu province, the author puts forward an effectively correcting pronunciation method in foreign language teaching: to take the distinctive features theory as criterion in correction of the pronunciation errors made by the adult students from this province.

The distinctive feature theory is the key part in phonemics.

With counterexamples the paper points out errors in present methods based on discernibility matrix for calculating the core of a decision table and points out that the key reason of errors is inconsistency of equivalent classes in.

Quality about rank of characteristic matrix s power;

Leading into the complex refractive index and making use of the characteristic matrix method,the photonic bandgap of photonic crystal with the variety of the absorb is studied.

Lead into the complex refractive index and make use of the characteristic matrix method,the photonic bandgap of TE wave and TM wave with the variety of the absorption were studied.