另外，非参数化形式的bootstrapping不需要对底层pdf做任何假设。

Furthermore, the nonparametric form of bootstrapping makes no assumptions about the underlying PDF.

youdao

传统的时序分析中，通常要建立合适的模型，要么首先假设特定的时序分布，要么用非参数估算模型来估计参数。

Traditionally, time series analysis involves building an appropriate model and using either parametric or nonparametric methods to make inference about the model parameters.

youdao

传统的时序分析中，通常要建立合适的模型，要么首先假设特定的时序分布，要么用非参数估算模型来估计参数。

Traditionally, time series analysis involves building an appropriate model and using either parametric or nonparametric methods to make inference about the model parameters.

youdao