The suggested model covers a broad range of settings in functional data analysis and the proposed smooth backfitting method is advantageous. Here I discuss its relationship with several alternative approaches.

中文翻译：

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讨论“希尔伯变系数模型的估计”

建议的模型涵盖了功能数据分析中的广泛设置，并且建议的平滑回拟合方法是有利的。在这里，我讨论了它与几种替代方法的关系。