|Author:||Lee, Hung Fai|
|Title:||Spatial-temporal community emotion estimation through social media text sentiment analysis|
|Subject:||Social media -- Social aspects.|
Social media -- Social aspects -- China -- Hong Kong.
Online social networks -- Social aspects.
Online social networks -- Social aspects -- China -- Hong Kong.
Public opinion -- Data processing.
Hong Kong Polytechnic University -- Dissertations
|Department:||Department of Computing|
|Pages:||vii, 50, 3 pages : color illustrations|
|Abstract:||Community sentiment status awareness is beneficial to individual emotion regulation . Strong emotional content spread over wide geographical area with fast speed . Community emotion status can be quickly reflected on social media. Therefore, a spatial-temporal community emotion status awareness system can be built by collecting text content from social media for sentiment analysis. Data was collected from social media Twitter by using Twitter provided API, the replied message marked with user's location and issuing date. The system scan through 14 districts in Hong Kong to collect the post between end of August to the end of October. 1-gram tf-idf technique were adopted to extract emotion feature from the text. Emotion classifier was built by using SVM-rbf kernel machine learning model. Non-local online corpus dataset was adopted as training set. The post from corpus which contain certain number of top 200 most frequent appear terms in local collected dataset was picked for training. This can refine the online corpus dataset as consist with local collected post as possible. The experiment result shows training with higher term consistency dataset has better accuracy while classifying local collected tweets. Collective emotion visualized in different region and different time. Analyzing those spatial-temporal data found that emotion in Southern and Shatin district has more obvious downward trends during data collection period. In district Wan Chai, Central Western and Yau Tsim Mong have higher tendency with good mood on Friday, Saturday and Sunday.|
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