A Uni ed Notion of Outliers: Properties and Computation
نویسندگان
چکیده
As said in signal processing, \One person's noise is another person's signal." For many applications , such as the exploration of satellite or medical images, and the monitoring of criminal activities in electronic commerce, identifying exceptions can often lead to the discovery of truly unexpected knowledge. In this paper, we study an intuitive notion of outliers. A key contribution of this paper is to show how the proposed notion of outliers uniies or generalizes many existing notions of outliers provided by discordancy tests for standard statistical distributions. Thus, a uniied outlier detection system can replace a whole spectrum of statistical discordancy tests with a single module detecting only the kinds of outliers proposed. A second contribution of this paper is the development of an approach to nd all outliers in a dataset. The structure underlying this approach resembles a data cube, which has the advantage of facilitating integration with the many OLAP and data mining systems using data cubes.
منابع مشابه
A Uni ed Approach to Spatial Outliers Detection
Spatial outliers represent locations which are signiicantly diierent from their neighborhoods even though they may not be signiicantly diierent from the entire population. Identiication of spatial outliers can lead to the discovery of unexpected , interesting, and implicit knowledge, such as local instability. In this paper, we rst provide a general deenition of S-outliers for spatial outliers....
متن کاملA Uni ed Systolic Array for Fast Computation of the DCT/DST/DHT
This paper proposes a two-dimensional (2-D) VLSI architecture using a uni ed systolic array for fast computation of the discrete cosine transform/discrete sine transform/discrete Hartley transform (DCT/DST/DHT). The N -point discrete transform is decomposed into evenand oddnumbered frequency samples and they are computed independently at the same time. The proposed uni ed systolic array archite...
متن کاملFilter theory in MTL-algebras based on Uni-soft property
The notion of (Boolean) uni-soft filters in MTL-algebras is introduced, and several properties of them are investigated. Characterizations of (Boolean) uni-soft filters are discussed, and some (necessary and sufficient) conditions for a uni-soft filter to be Boolean are provided. The condensational property for a Boolean uni-soft filter is established.
متن کاملGENERIC CRSs INFINITE - DOMAIN PROBLEMS FINITE - DOMAIN PROBLEMS
The lack of a uni ed framework for constraint problems has resulted in a diversity of constraint solution techniques and methods for describing constraint problems. A uni ed framework would allow the construction of a kernel constraint engine, capable of solving constraint problems composed of models from di erent domains, such as engineering and geometric problems. As a rst step towards such a...
متن کاملA Unified Notion of Outliers: Properties and Computation
As said in signal processing, “One person’s noise is another person’s signal.” For many applications, such as the exploration of satellite or medical images, and the monitoring of criminal activities in electronic commerce, identifying exceptions can often lead to the discovery of truly unexpected knowledge. In this paper, we study an intuitive notion of outliers. A key contribution of this pap...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1997