The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper we propose a web log mining-based network user behavior analysis scheme, which plays an important role in network structure optimization and website server configuration. Based on clustering and regression model, we studied the network user's visit model in a university by analyzing a large amount of web log data which is collected from the university campus network. The data analyzing...
ETL plays a significant role in DW construction. Basically, ETL management is rooted in metadata management of the ETL processes. A metadata management system with good design can highly improve the ETL efficiency. However, the large amount and the wide distribution of metadata in ETL processes cause the mismanagement of metadata, which hasn't got a good solution yet. To deal with this problem, the...
In this thesis, memory principle and ant colony algorithm are fused and applied in intrusion detection system. The method of controlling pheromone used in ant colony algorithm is applied to simulate the memory process of human brain, and the concept of pheromone is put forth. The processes of memorizing and forgetting are reasonably interpreted through the increase and decrease of pheromone, and in...
In order to accelerate the execution of XQuery, this paper introduces an evaluator named as XML query lazy evaluator (XQLE), which uses lazy evaluation optimization technique. The input language is functional XML query language (FXQL) that is a functional language with concise form. For data model, XQLE uses generalized list with the ability to hold closure and XML node to support lazy calculation...
While models for data provenance have been extensively studied in the literature, the efficient evaluation of the resulting provenance queries remains an open problem. Traditional query optimization techniques, like the use of general-purpose indexes, or the materialization of provenance data, fail on different fronts to address the problem. Provenance-specific optimization techniques, like the use...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.