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arXiv 2208.00564cs.LGquant-phstat.ML
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用于神经元密度估计的量子自适应傅里叶特征

Quantum Adaptive Fourier Features for Neural Density Estimation

MindLab(思维实验室);Universidad Nacional de Colombia(哥伦比亚国立大学)

Joseph A. Gallego, Fabio A. González

摘要:

密度估计是统计学和机器学习应用中的基本任务。核密度估计是低维非参数密度估计的有力工具,但在高维情况下性能较差。此外,其预测复杂度与更多的训练数据点成线性比例。本文提出了一种神经密度估计方法,该方法可以看作是核密度估计的一种,但没有高的预测计算复杂性。该方法是基于密度矩阵,在量子力学中使用的形式主义,和自适应傅立叶特征。该方法可以在没有优化的情况下进行训练,但它也可以与深度学习架构集成,并使用梯度下降进行训练。因此,它可以被看作是一种神经密度估计方法。该方法在不同的合成和真实数据集上进行了评估,并将其性能与最先进的神经密度估计方法进行了比较,获得了有竞争力的结果。

英文摘要:

Density estimation is a fundamental task in statistics and machine learning applications. Kernel density estimation is a powerful tool for non-parametric density estimation in low dimensions; however, its performance is poor in higher dimensions. Moreover, its prediction complexity scale linearly with more training data points. This paper presents a method for neural density estimation that can be seen as a type of kernel density estimation, but without the high prediction computational complexity. The method is based on density matrices, a formalism used in quantum mechanics, and adaptive Fourier features. The method can be trained without optimization, but it could be also integrated with deep learning architectures and trained using gradient descent. Thus, it could be seen as a form of neural density estimation method. The method was evaluated in different synthetic and real datasets, and its performance compared against state-of-the-art neural density estimation methods, obtaining competitive results.

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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