Name
Abstract | ||
|---|---|---|
A spatial colocation pattern is a group of spatial features whose instances are frequently located together in geographic space. Discovering colocations has many useful applications. For example, colocated plant species discovered from plant distribution data sets can contribute to the analysis of plant geography, phytosociology studies, and plant protection recommendations. In this paper, we study the colocation mining problem in the context of uncertain data, as the data generated from a wide range of data sources are inherently uncertain. One straightforward method to mine the prevalent colocations in a spatially uncertain data set is to simply compute the expected participation index of a candidate and decide if it exceeds a minimum prevalence threshold. Although this definition has been widely adopted, it misses important information about the confidence which can be associated with the participation index of a colocation. We propose another definition, probabilistic prevalent colocations, trying to find all the colocations that are likely to be prevalent in a randomly generated possible world. Finding probabilistic prevalent colocations (PPCs) turn out to be difficult. First, we propose pruning strategies for candidates to reduce the amount of computation of the probabilistic participation index values. Next, we design an improved dynamic programming algorithm for identifying candidates. This algorithm is suitable for parallel computation, and approximate computation. Finally, the effectiveness and efficiency of the methods proposed as well as the pruning strategies and the optimization techniques are verified by extensive experiments with “real $(+)$ synthetic” spatially uncertain data sets. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1109/TKDE.2011.256 | IEEE Trans. Knowl. Data Eng. |
Keywords | Field | DocType |
plant geography,prevalent colocations,probabilistic prevalent colocations,uncertain data,finding probabilistic prevalent colocations,spatially uncertain data sets,pruning strategy,spatially uncertain data set,colocated plant species,discovering colocations,data source,plant distribution data set,approximation algorithms,dynamic programming,data mining,probability,dynamic programming algorithm,parallel processing,data models,possible worlds,parallel computation,indexes,probabilistic logic,ppc | Dynamic programming,Data modeling,Approximation algorithm,Data mining,Data set,Computer science,Uncertain data,Artificial intelligence,Probabilistic logic,Machine learning,Possible world,Computation | Journal |
Volume | Issue | ISSN |
25 | 4 | 1041-4347 |
Citations | PageRank | References |
11 | 0.65 | 0 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Lizhen Wang | 1 | 13 | 1.73 |
| Pingping Wu | 2 | 11 | 0.65 |
| Hongmei Chen | 3 | 34 | 5.17 |