arXiv:2409.15764cs.LGcs.AI2024-09被引 5

针对多类型犯罪预测中模式混杂与区域数据不均问题,提出时空图专家混合框架。

Spatial-Temporal Mixture-of-Graph-Experts for Multi-Type Crime Prediction

  • 设计注意力门控的图专家混合模块,区分不同犯罪类型的时空特征。
  • 引入跨专家对比学习,使每个专家专注特定模式,减少冗余。
  • 采用分层自适应损失重加权,缓解数据稀疏区域的学习不足。

随着各类犯罪持续威胁公共安全与经济发展,对多种犯罪类型进行联合预测变得愈发重要。尽管已有大量研究,但多数方法忽视了不同犯罪类别的异质性,且未能解决空间分布不平衡的问题。本文提出时空图专家混合(ST-MoGE)框架,用于多类型犯罪的联合预测。为增强模型识别多样化时空依赖的能力,并缓解不同犯罪类别间时空异质性带来的潜在冲突,我们引入一种注意力门控的图专家混合(MGEs)模块,以捕捉每类犯罪的独特与共享模式。随后提出跨专家对比学习(CECL),用于更新MGEs并强制每个专家专注于特定模式建模,从而降低模式混淆与冗余。此外,为应对空间分布不均问题,提出分层自适应损失重加权(HALR)方法,消除数据稀疏区域的偏差与学习不足。我们在两个真实世界犯罪数据集上进行了全面实验,并与十二个先进基线模型进行比较。结果表明所提方法具有显著优势。

原文摘要 · Abstract (English)

As various types of crime continue to threaten public safety and economic development, predicting the occurrence of multiple types of crimes becomes increasingly vital for effective prevention measures. Although extensive efforts have been made, most of them overlook the heterogeneity of different crime categories and fail to address the issue of imbalanced spatial distribution. In this work, we propose a Spatial-Temporal Mixture-of-Graph-Experts (ST-MoGE) framework for collective multiple-type crime prediction. To enhance the model's ability to identify diverse spatial-temporal dependencies and mitigate potential conflicts caused by spatial-temporal heterogeneity of different crime categories, we introduce an attentive-gated Mixture-of-Graph-Experts (MGEs) module to capture the distinctive and shared crime patterns of each crime category. Then, we propose Cross-Expert Contrastive Learning(CECL) to update the MGEs and force each expert to focus on specific pattern modeling, thereby reducing blending and redundancy. Furthermore, to address the issue of imbalanced spatial distribution, we propose a Hierarchical Adaptive Loss Re-weighting (HALR) approach to eliminate biases and insufficient learning of data-scarce regions. To evaluate the effectiveness of our methods, we conduct comprehensive experiments on two real-world crime datasets and compare our results with twelve advanced baselines. The experimental results demonstrate the superiority of our methods.

犯罪预测图神经网络多任务学习时空建模

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