منابع مشابه
Spatio-Temporal Retrieval with RasDaMan
Database support for multidimensional arrays is an area of growing importance; a variety of highvolume applications such as spatio-temporal data management and statistics/OLAP become focus of academic and market interest. RasDaMan is a domain-independent array database management system with server-based query optimization and evaluation. The system is fully operational and being used in intern...
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Spatio-temporal point process models play a central role in the analysis of spatially distributed systems in several disciplines. Yet, scalable inference remains computationally challenging both due to the high resolution modelling generally required and the analytically intractable likelihood function. Here, we exploit the sparsity structure typical of (spatially) discretised log-Gaussian Cox ...
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A new technique is proposed for clustering and similarity retrieval of video motion clips based on spatio-temporal object trajectories. The trajectories are treated as motion time series and represented either by least squares or Chebyshev polynomial approximations. Trajectory clustering is then carried out to discover patterns of similar object motion behaviour. The coefficients of the basis f...
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The results of traditional spatial queries (i.e., range search, nearest neighbor, etc.) are usually meaningless in spatio-temporal applications, because they will be invalidated by the movements of query and/or data objects. In practice, a query result R should be accompanied with validity information specifying (i) the (future) time T that R will expire, and (ii) the change C of R at time T (s...
متن کاملSupplementary material: Spatio-temporal Person Retrieval via Natural Language Queries
In this section, we provide the further details of the dataset statistics. The description length. We first analyze the description length (i.e., the number of words in a description). Figure 1 shows the distribution of the number of words in a description. We can see that our dataset contains various lengths of descriptions. The average length of descriptions in our dataset is 13.1. We also sh...
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ژورنال
عنوان ژورنال: ACM Transactions on Information Systems
سال: 2001
ISSN: 1046-8188,1558-2868
DOI: 10.1145/366836.366874