arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2402.04740stat.MLcs.LGq-fin.CPq-fin.ST
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多维标记霍克斯过程的非参数估计

Non-Parametric Estimation of Multi-dimensional Marked Hawkes Processes

Indian Institute of Science(印度科学学院)

Sobin Joseph, Shashi Jain

AI总结:

针对标记霍克斯过程非参数估计的空白,提出两种神经网络模型估计条件强度,在合成数据验证并应用于加密货币订单簿数据。

摘要:

霍克斯过程的一个扩展,标记霍克斯过程的特点在于每次事件的跳跃大小可变,这与无标记霍克斯过程中观察到的恒定跳跃大小形成对比。尽管已有大量文献致力于线性和非线性霍克斯过程的非参数估计,但关于标记霍克斯过程的文献仍存在显著空白。针对这一问题,我们提出了一种估计标记霍克斯过程条件强度的 methodology。我们引入了两种不同的模型:\textit{浅层神经霍克斯带标记}——用于具有兴奋性核的霍克斯过程,以及\textit{非线性霍克斯带标记的神经网络}——用于非线性霍克斯过程。这两种方法都将过去的到达时间及其对应的标记作为输入以获得到达强度。该方法完全是非参数的,保留了标记霍克斯过程相关的可解释性。为了验证我们方法的有效性,我们将该方法应用于具有已知真实值的合成数据集。此外,我们将我们的方法应用于建模加密货币订单簿数据,展示了其在实际场景中的适用性。

英文摘要:

An extension of the Hawkes process, the Marked Hawkes process distinguishes itself by featuring variable jump size across each event, in contrast to the constant jump size observed in a Hawkes process without marks. While extensive literature has been dedicated to the non-parametric estimation of both the linear and non-linear Hawkes process, there remains a significant gap in the literature regarding the marked Hawkes process. In response to this, we propose a methodology for estimating the conditional intensity of the marked Hawkes process. We introduce two distinct models: \textit{Shallow Neural Hawkes with marks}- for Hawkes processes with excitatory kernels and \textit{Neural Network for Non-Linear Hawkes with Marks}- for non-linear Hawkes processes. Both these approaches take the past arrival times and their corresponding marks as the input to obtain the arrival intensity. This approach is entirely non-parametric, preserving the interpretability associated with the marked Hawkes process. To validate the efficacy of our method, we subject the method to synthetic datasets with known ground truth. Additionally, we apply our method to model cryptocurrency order book data, demonstrating its applicability to real-world scenarios.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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