Abstract
In forest dynamics models, the intensive computation and load involved in the simulation of seed dispersal can become unbearably huge for large-scale forest analysis. To solve this problem, we propose a multi-resolution algorithm to compute seed dispersal on GPU. By exploiting the computation parallelism of seed dispersal, the computation of the whole forest plot is divided into multiple small plot cells, which are computed independently by parallel threads on GPU. To further improve the calculation efficiency with limited threads scale for GPU computation, we propose a hierarchical method to cluster the plot cells into a multi-resolution form according to the biological curves of tree seed dispersal. Experimental results show that our algorithm not only greatly reduces computational time but also obtains comparably correct results as compared to the naive GPU algorithm, which makes it especially suitable for large-scale forest modeling.
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Project supported by the National Natural Science Foundation of China (Nos. 61173097 and 61003265), the Natural Science Foundation of Zhejiang Province, China (No. Z1090459), the Science and Technology Planning Project of Zhejiang Province, China (No. 2010C33046), and Tsinghua-Tencent Joint Laboratory for Internet Innovation Technology
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Fan, J., Ji, Hf., Guan, Xx. et al. A GPU-based multi-resolution algorithm for simulation of seed dispersal. J. Zhejiang Univ. - Sci. C 13, 816–827 (2012). https://doi.org/10.1631/jzus.C1200147
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DOI: https://doi.org/10.1631/jzus.C1200147