Shaofei Wu

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The recent advance of data mining technology to analyze vast amount of data has played an important role in marketing business, despite its benefits in such areas, data mining also opens new threats to privacy and information security if not done or used properly. The main problem is that from non-sensitive data, one is able to infer sensitive information,(More)
Intrusion detection is an effective security mechanism developed in the recent decade. Because of its wide applicability, intrusion detection becomes the key part of the security mechanism. The modern technologies and models in intrusion detection field are categorized and studied. The characters of current practical IDS are introduced. The theories and(More)
Web service composition is used as subprocess in the workflow system. If the workflow can provide high reliability and constituency through transaction process technology, the composition of Web service and workflow will be the main solution to solve problem of e-business. Traditional transaction model lacks support for long-running transaction in(More)
By applying the approaches of Data Mining into the Electronic Commerce, the owner of the Electronic Commerce can find out the really useful knowledge from the mass of data to make a right decision. Association rules mining has be used in order to find out the user access pattern in Electronic Commerce. Since it can not really fit in the Web log mining, the(More)
It is a challenge to prepare organic electrodes for sodium-ion batteries with long cycle life and high capacity. The highly reactive radical intermediates generated during the sodiation/desodiation process could be a critical issue because of undesired side reactions. Here we present durable electrodes with a stabilized α-C radical intermediate. Through the(More)
Assessing the spatio-temporal variations of surface water quality is important for water environment management. In this study, surface water samples are collected from 2008 to 2015 at 17 stations in the Ying River basin in China. The two pollutants i.e. chemical oxygen demand (COD) and ammonia nitrogen (NH3-N) are analyzed to characterize the river water(More)
The matched spectrum and correlation characteristics are both important to realize the multichannel ultrasonic sensors working together. The spectrum matching can make full use of the bandwidth of the ultrasonic ranging system, and the good correlation characteristic can eliminate crosstalk among multichannel ultrasonic sensors triggering simultaneously.(More)