Implementation of a weblog extraction system with an improved template extraction technique

Purpose: The objectives of this study are to explore an effective technique to extract information from weblogs and develop an experimental system to extract structured information as much as possible with this technique. The system will lay a foundation for evaluation, analysis, retrieval, and utilization of the extracted information.Design/methodology/approach: An improved template extraction technique was proposed.Separate templates designed for extracting blog entry titles, posts and their comments were established, and structured information was extracted online step by step. A dozen of data items, such as the entry titles, posts and their commenters and comments, the numbers of views, and the numbers of citations were extracted from eight major Chinese blog websites,including Sina, Sohu and Bokee.Findings: Results showed that the average accuracy of the experimental extraction system reached 94.6%. Because the online and multi-threading extraction technique was adopted, the speed of extraction was improved with the average speed of 15 pages per second without considering the network delay. In addition, entries posted by Ajax technology can be extracted successfully.Research limitations: As the templates need to be established in advance, this extraction technique can be effectively applied to a limited range of blog websites. In addition, the stability of the extraction templates was affected by the source code of the blog pages.Practical implications: This paper has studied and established a blog page extraction system,which can be used to extract structured data, preserve and update the data, and facilitate the collection, study and utilization of the blog resources, especially academic blog resources.Originality/value: This modified template extraction technique outperforms the Web page downloaders and the specialized blog page downloaders with structured and comprehensive data extraction.

Modeling of strain-inducedγ→α′phase transformation for 201Cu metastable austenitic stainless steel and its verification in rolling processes

To model the strain-inducedγ→α′phase transformation for the Cr-Mn metastable austenitic stainless steel,the 201Cu steel was chosen as the analytical material and the cylindrical samples of this steel with size ofϕ5 mm×10 mm were compressed at strains of 0.2–0.6 in the temperature range of 25–150°C and in the strain rate range of 0.1–5.0 s^(−1).The flaky samples were prepared by wire cutting from the cylindrical samples and the volume fraction of the strain-inducedα′phase was detected in the test point of the flaky samples.The volume fraction changing with the process parameters was modeled,and the critical temperatures and the critical strains to preventγ→α′phase transformation were calculated as other different process parameters changed.The linear fitting goodness of the model between the calculated volume fraction values and the tested ones is 0.986 and the validity of the model was verified by application in cold and warm rolling experiments.