Research On The Internet Public Opinions Of Sina Microblog

Recently, With the popularity of the Internet, the increasing awareness of social participation among Internet users, and the occurrence of some social hot spots and unexpected events, the Internet public opinion breaks out a huge of energy. Especially with the rise and development of microblog, Internet users can release information both by computer and by mobile phone, which is not more than 140 characters each note. Characteristics of immediate, fast, convenient and rapid spread of the network further promote the development of the Internet public opinion. Public opinion on the microblog has also become one of the most influential network public opinions.Sina Microblog is a new web application as Twitter Microblog, and a combination of the Micro-Content and the SNS. Sina Microblog has completely changed the method of sharing and communicating information. Through the function of Concerning, Sina Microblog makes Internet users related among each other, so that everyone is both audience and speaker on Internet. This is the change not only in the way of information dissemination, but also in interpersonal relationships. This change brings revolutionary effects on network information values.Signal analysis is a procedure explaining, questioning, assuming, completing, verifying and evaluating the foretastes and signs. This method is based on incomplete information conditions.By focusing on the signal generation, continuous monitoring, scanning, proper identification, interpretation of signals, we can timely prevent the threats and crisises. Signal analysis is an important analysing and forecasting method in intelligence filed.In this paper, the framework of the signal analysis model is decomposited. Signal collection model is mapped to a text acquisition phase. Signal identification model is mapped to topic identifying pgase. Interpretation of phase signal is mapped to emotional orientation discrimination stage. Based on this model, by three experiments of public opinion obtain, public opinion found and public opinion analysis, using of reptiles crawling, text clustering, quantitative analysis, k-means algorithm and the text vector tools, this paper selects the "national total"and "livelihood" two main themes of the text microblogging in sina.com to do the public opinion analysis. In the process of analysing, this paper identifies the hot topics in these two themes, by the statistical and distributing methods, identifys the Sina microblog emotional orientation of text in all topics.We obtain three characteristics, which are a new micro-blog network in Sina precision and long tail of public opinion, time and reputation, diffusion and resonance. At last, these characteristics of Sina Microblog play an important role in e-commerce, enterprise decision support and network public opinion early warning.