研究瞬时频率的估计方法具有重要的理论意义和实用价值。

So the research about its methods to estimate will be valuable in theory and practice.

youdao

近年来，稳健估计在洪水频率分析中的应用已被提出。

Robust estimation has been applied in flood frequency analysis.

youdao

近年来，稳健估计在洪水频率分析中的应用已被提出。

Robust estimation has been applied in flood frequency analysis.

youdao