Read e-book online Analyzing Time Interval Data : Introducing an Information PDF

By Philipp Meisen

Philipp Meisen introduces a version, a question language, and a similarity degree allowing clients to research time period info. The brought instruments are mixed to layout and notice a data approach. The offered method is in a position to acting analytical initiatives (avoiding any form of summarizability problems), offering insights, and visualizing effects processing hundreds of thousands of periods inside milliseconds utilizing an intuitive SQL-based question language. the center of the answer is predicated on numerous bitmap-based indexes, which allow the approach to address large quantities of time period data. 

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Extra resources for Analyzing Time Interval Data : Introducing an Information System for Time Interval Data Analysis

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In addition, GTA is a theoretical definition which "offers a uniform way of expressing concisely the various forms of temporal aggregation" and "does not imply an efficient implementation" (Böhlen et al. 2008). 1 discusses the usage of temporal aggregators, as well as summarizability problems. Chapter 5 introduces a query language supporting the usage of temporal aggregations. 3 Temporal Models In literature about time, various temporal models have been proposed to represent physical time. Generally it can be stated that physical time can be modeled as discrete, dense, or continuous (Dyreson et al.

A time interval of [09:45:12, 09:45:57]). During (or after) the observation the properties color, class, weight, fall, and duration were measured. f. 2), it is noticeable that properties may have to be handled differently from a semantical and analytical point of view. For example, the property color can be of interest when filtering, whereas the property class may be useful to determine a price, which can be important when aggregating. , the property fall is not constant. 00 m is only valid for time points t ≥ tend.

41 Medium The feature requests DI-02 and DI-03 are defined to cover important and often, in the context of time interval data analysis, applied strategies. The specified strategies are used to ensure data quality (by plausibility checks) or to offer the possibility to enrich missing values. , the information system should offer a scripting interface useful to implement integration or cleansing techniques. This interface enables an analyst to apply techniques prior to using additional data integration tools.

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