Abstract
This work addresses a novel variant of the Maximum Range-Sum (MaxRS) query for settings in which spatial point objects occur dynamically and, upon occurrence, their significance (i.e., weight) decays over time. The objective of the original MaxRS query is to find a location to place (the centroid of) a fixed-size spatial rectangle so that the sum of the weights of the point objects in its interior is maximized. The unique aspect of the problem studied in this paper, which we call DDW-MaxRS (Dynamic and Decaying Weights MaxRS), is that the placement of its solution can vary over time due to the joint impact of the arrival of new objects and the change of the corresponding weights of the existing objects over time. To improve the efficiency of the DDW-MaxRS problem processing, we propose a memory-efficient approximate algorithmic solution that will naturally infuse uncertainty in the answer. We formally analyze the error bounds’ properties and provide experimental results to quantify the effectiveness of the proposed approach.
Research supported by the NSF SWIFT grant 2030249.
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Notes
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Implementation and the datasets used are publicly available at https://github.com/Ashraf-T/DDW-MaxRS.
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Tahmasbi, A., Trajcevski, G. (2022). Maximum Range-Sum for Dynamically Occurring Objects with Decaying Weights. In: Chiusano, S., Cerquitelli, T., Wrembel, R. (eds) Advances in Databases and Information Systems. ADBIS 2022. Lecture Notes in Computer Science, vol 13389. Springer, Cham. https://doi.org/10.1007/978-3-031-15740-0_18
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