Then the paper probes an ambiguity in defining sign in general: a sign is either something that represents something else or correlation between something and something else represented by something.

Then,certain theories and strategies are employed in disambiguation.

This thesis explores the common phenomena of ambiguity in English and the forming factors there of and proposes means of disambiguation.

Study bifurcation from the branch of trivial solutions for a class of semilinear elliptic equations, at the second eigenvalue of the Laplacian in,× and we give the exact bifurcation solutions formular.

Linear analysis have shown that the system exists stable stationary bifurcation solution .

Second,it is proved that under some conditions,the positive steady-state solutions are stable by using the stability theorem on bifurcation solutions.

By local bifurcation theory and perturbation theory,the existence of local bifurcating solution and its stability are obtained.

A approach for word disambiguation based on HNC;

BUAASEISEG can recognize new words in various domains and do disambiguation and segment words with arbitrary length.

Taking four kinds of popular full-text software as subjects of study,it makes some practical suggestions after analyzing their problems: choice of word meaning,phrase identification,disambiguation and improper syntactic disposition.