对比多种数据生成方法,提升消防干预模拟的逼真度。
Generating Heterogeneous Multi-dimensional Data : A Comparative Study
- 比较随机采样、VAE、GAN等五种数据生成方法。
- 扩散模型在捕捉低频事件和时空分布上表现最佳。
- 专为消防场景设计评估指标,适合应急系统研究者。
消防救援中的人员与物资调配高度依赖模拟实验。为优化响应效率,需生成多样化数据以测试不同场景。本研究对比了随机采样、表格变分自编码器、标准生成对抗网络、条件表格生成对抗网络及扩散概率模型等方法,评估其在捕捉消防干预复杂性方面的有效性。传统评价指标难以反映合成数据在真实场景中的适用性,因此引入领域专用指标(如响应时间分布、时空分布、事故表征)与标准度量(如Wasserstein距离)联合评估。数据分布高度不平衡,各变量均非正态分布,增加了生成难度。评估关注数据变异、复杂相关性保持、罕见事件再现、统计分布一致性及操作相关性。
原文摘要 · Abstract (English)
Allocation of personnel and material resources is highly sensible in the case of firefighter interventions. This allocation relies on simulations to experiment with various scenarios. The main objective of this allocation is the global optimization of the firefighters response. Data generation is then mandatory to study various scenarios In this study, we propose to compare different data generation methods. Methods such as Random Sampling, Tabular Variational Autoencoders, standard Generative Adversarial Networks, Conditional Tabular Generative Adversarial Networks and Diffusion Probabilistic Models are examined to ascertain their efficacy in capturing the intricacies of firefighter interventions. Traditional evaluation metrics often fall short in capturing the nuanced requirements of synthetic datasets for real-world scenarios. To address this gap, an evaluation of synthetic data quality is conducted using a combination of domain-specific metrics tailored to the firefighting domain and standard measures such as the Wasserstein distance. Domain-specific metrics include response time distribution, spatial-temporal distribution of interventions, and accidents representation. These metrics are designed to assess data variability, the preservation of fine and complex correlations and anomalies such as event with a very low occurrence, the conformity with the initial statistical distribution and the operational relevance of the synthetic data. The distribution has the particularity of being highly unbalanced, none of the variables following a Gaussian distribution, adding complexity to the data generation process.
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