منابع مشابه
Discovering Periodic Patterns in Database Audit Trails
Information about periodic processing of database operations has a pivotal importance for continuous physical database design and automated performance tuning of database systems. This work shows how to detect the oscillations of database workloads caused by the periodical invocations of user applications. In particular, we present an algorithm for discovering the periodic patterns in processin...
متن کاملDiscovering Periodic-Frequent Patterns in Transactional Databases
Since mining frequent patterns from transactional databases involves an exponential mining space and generates a huge number of patterns, efficient discovery of user-interest-based frequent pattern set becomes the first priority for a mining algorithm. In many real-world scenarios it is often sufficient to mine a small interesting representative subset of frequent patterns. Temporal periodicity...
متن کاملDiscovering Periodic Patterns in Historical News
We address the problem of observing periodic changes in the behaviour of a large population, by analysing the daily contents of newspapers published in the United States and United Kingdom from 1836 to 1922. This is done by analysing the daily time series of the relative frequency of the 25K most frequent words for each country, resulting in the study of 50K time series for 31,755 days. Behavio...
متن کاملDiscovering Periodic Patterns in System Logs
Historical information stored in the software system logs, audit trails, traces of user applications, etc. can be analysed to discover the patterns in periodic variations of levels and structures of the past workloads. These patterns allow for the estimation of intensities and structures of the future workloads. The correctly anticipated future workloads are used to improve performance of softw...
متن کاملDiscovering Quasi-Periodic-Frequent Patterns in Transactional Databases
Periodic-frequent patterns are an important class of user-interest-based frequent patterns that exist in a transactional database. A frequent pattern can be said periodic-frequent if it appears periodically throughout the database. We have observed that it is difficult to mine periodic-frequent patterns in very large databases. The reason is that the occurrence behavior of the patterns can vary...
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ژورنال
عنوان ژورنال: Knowledge and Information Systems
سال: 2004
ISSN: 0219-1377,0219-3116
DOI: 10.1007/s10115-003-0111-z