A large number of texts are rapidly generated as streaming data in social media. Since it is difficult to process such text streams with limited memory in real time, researchers are resorting to text stream compression and sampling to obtain a small portion of valuable information from the streams. In this study, we investigate the crucial question of how to use less memory space to store more valuable texts to maintain the global information of the stream. First, we propose a text stream sampling framework based on compressed sensing theory, which can sample a text stream with a lightweight framework to reduce the space consumption while still retaining the most valuable texts. We then develop a query word-based retrieval task as well as a topic detection and evolution analysis task on the sample stream to evaluate the performance of the framework in retaining valuable information. The framework is evaluated from several aspects using two representative datasets of social media, including compression ratio, runtime, information reserved rate, and efficiency of the text analysis tasks. Experimental results demonstrate that the proposed framework outperforms baseline methods and is able to complete the text analysis tasks with promising results.
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In the following, to distinguish the concept of sample framework proposed in the paper and the samples used in CS theory, the latter is replaced by linear measurements, or measurements in short, which are also commonly used wordings in the CS theory.
The dataset is downloaded from http://snap.stanford.edu/data.
The code are available at http://code.google.com/p/word2vec/.
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The work was partially supported by the National Science Foundation of China (NSFC, No. 61472291) and (NSFC, No. 41472288).
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Tian, G., Huang, J., Peng, M. et al. Dynamic sampling of text streams and its application in text analysis. Knowl Inf Syst 53, 507–531 (2017). https://doi.org/10.1007/s10115-017-1039-z
- Text stream
- Compressed sensing
- Text analysis