Spatial-Net: A Self-Adaptive and Model-Agnostic Deep Learning Framework for Spatially Heterogeneous Datasets
Spatial-Net: A Self-Adaptive and Model-Agnostic Deep Learning Framework for Spatially Heterogeneous Datasets
复制标题
Spatial-Net:用于空间异构数据集的自适应且与模型无关的深度学习框架
DOI:
10.1145/3474717.3483970
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Ravirathinam, Praveen
中科院分区:
文献类型:
--
作者:
Xie, Yiqun;Jia, Xiaowei;Bao, Han;Zhou, Xun;Yu, Jia;Ghosh, Rahul;Ravirathinam, Praveen
Knowledge discovery from spatial data is essential for many important societal applications including crop monitoring, solar energy estimation, traffic prediction and public health. This paper aims to tackle a key challenge posed by spatial data - the intrinsic spatial heterogeneity commonly embedded in their generation processes - in the context of deep learning. In related work, the early rise of convolutional neural networks showed the promising value of explicit spatial-awareness in deep architectures (i.e., preservation of spatial structure among input cells and the use of local connection). However, the issue of spatial heterogeneity has not been sufficiently explored. While recent developments have tried to incorporate awareness of spatial variability (e.g., SVANN), these methods either rely on manually-defined space partitioning or only support very limited partitions (e.g., two) due to reduction of training data. To address these limitations, we propose a Spatial-Net to simultaneously learn a space-partitioning scheme and a deep network architecture with a Significance-based Grow-and-Collapse (SIG-GAC) framework. SIG-GAC allows collaborative training between partitions and uses an exponential reduction tree to control the network size. Experiments using real-world datasets show that Spatial-Net can automatically learn the pattern underlying heterogeneous spatial process and greatly improve model performance.
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DOI:
--
发表时间:
2020
期刊:
arXiv.org
影响因子:
--
作者:
Jayant Gupta;Yiqun Xie;S. Shekhar
通讯作者:
S. Shekhar
DOI:
10.1145/3274895.3274901
发表时间:
2018
期刊:
Proceedings of the 26th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems
影响因子:
--
作者:
Xie, Yiqun;Bhojwani, Rahul;Shekhar, Shashi;Knight, Joseph
通讯作者:
Knight, Joseph
影响因子:
46.9
作者:
Noble, William S.
通讯作者:
Noble, William S.
影响因子:
5
作者:
Jiang, Zhe;Sainju, Arpan Man;Knight, Joseph
通讯作者:
Knight, Joseph