This paper implements a database synchronization system for the SQLite. For some of the problems encountered in the design and development of systems, by looking for literature, guessing and analyzing implementation methods of these similar systems, has solved some key issues and design and implement our own solutions. Mainly UUID replaces integer data format as data representation; Design table to store synchronization information metadata; Use HTTP protocol to transmit data and resolve security authentication and encrypted transmission; Use JSON format as the serial data format on the network transmission; Use JZEE platform to process system concurrent.
Abstract. In order to enhance prediction precision of online public opinion, it put forward a kind of online public opinion prediction model (PSR-SVR) with the combination of chaos theory and support vector regression. First of all, the original data of online public opinion were obtained throughout topic segmentation, hotspot extraction, and data aggregate. Then, time sequence of online public opinion was reconstructed throughout phase-space reconstruction. Finally, the reconstructed time sequence of online public opinion was input support vector regression for modeling and prediction, and then it was compared with other online public opinion prediction model by experiment. The result shows that compared with the contrast model, PSR-SVR improves the prediction precision and reliability of online public opinion, and the prediction results have certain practical value.
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