منابع مشابه
Reporting Flock Patterns
Data representing moving objects is rapidly getting more available, especially in the area of wildlife GPS tracking. It is a central belief that information is hidden in large data sets in the form of interesting patterns, where a pattern can be any configuration of some moving objects in a certain area and/or during a certain time period. One of the most common spatio-temporal patterns sought ...
متن کاملFlock Patterns and Context
The wide deployment of location detection devices (for example, smartphones) leads to collecting of large datasets in the form of trajectories. There are a whole set of papers devoted to trajectory-based queries. Mostly, they are concentrated on similarity queries. In the same time, there is a constantly groving interest in getting various forms for aggregating behavior of trajectories as group...
متن کاملEfficient Algorithms to Discover Flock Patterns in Trajectories
With the ubiquitous use of location enabled devices, pattern discovery in trajectories has been receiving increasing interest. Among such patterns, we have queries related to how groups of moving objects behave over time such as discovering flocks. A flock pattern is defined as a set of moving objects that move within a predefined distance to each other for a given continuous period of time. A ...
متن کاملEfficient Mining of Closed Flock Patterns from Large Trajectory Data
In this paper, we study the closed pattern mining problem for a class of spatio-temporal patterns, called closed (k, r)-flock patterns in trajectory databases. A (k, r)-flock pattern (Gudmundsson and van Kreveld, 2006) represents a set of moving objects traveling close each other within radius r during time period of length k. Based on the notion of the envelope for a flock pattern, we introduc...
متن کاملA New Semifield Flock
Let K be a quadratic cone of PG(3, q) with vertex v. A flock F of K is a partition of K"[v] into q conics. If all planes containing the elements of the flock F share a common line, then F is called linear. Given a flock F there is a standard construction of a generalized quadrangle Q(F) associated with F ([19]), which is classical if and only if F is a linear flock. Article ID jcta.1998.2933, a...
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ژورنال
عنوان ژورنال: Computational Geometry
سال: 2008
ISSN: 0925-7721
DOI: 10.1016/j.comgeo.2007.10.003