Research Of Product Public Opinion Analysis Based On Semantic Gramamr

Nowadays, with the rapid development of market economy, social economy has become increasingly prominent in social conflicts, and product quality and after-sales service have become the decisive factors of enterprise development and have an key influence on user consumption. This is why network-based public opinion analysis of products has become an important research topic.At present, major pragmatic methods of public opinion analysis are keyword-based, and such keywords-based methods and related statistical methods suffer several defeats.First, Many noisy data are recognized as positive results, governments and enterprises can not achieve the desired results from public opinion analysis.Second, methods of removing repeative network public opinions, classification of public opinion, evaluation of positive and negative public opinions are still premature.Finally, public opinions in their early stages of development are very significant, but since the data are sparse, keyword-based methods in general fail in detecting such early public opinions.To solve these problems, scholars have proposed a method of analysis based a semantic Grammatical of public opinions, but because of the diversity of products and complex nature, this method is not folly applicable to product public opinion analysis. This thesis presents a topic of public opinions and product public opinion Grammatical (PPOG) as fundamental techniques. Through a large number of product public opinion test, the analysis method based on PPOG has a better application prospect.The main results of the thesis are as follows:First, in the use of national standards "statistical classification catalogue" for various products to establish a unified framework, the establishment of a framework based on the theme of product classification, the basis for the analysis of product public opinion.Second, proposed the use of product classification structure and public opinion topic using top-down product public opinion grammar design method to establish product public opinion grammar.Third, by observation of public opinion corpus and seed pattern library and summary, put forward a kind of using seed pattern library method of product public opinion grammar redundant senses of a word meaning clear. Fourth, the important principles and methods to be followed in the process of the design of the product public opinion grammar and the grammar designer should be followed.Finally, on the basis of LL (1), a prototype system for the analysis of public opinion is realized, and the experiment is carried out, and preliminary results are obtained.