In this approach, a part of the system noise models are intended to adaptively match the unknown true mode.

该算法自适应调整部分系统噪声模型，使之接近符合实际的系统噪声模型。

youdao

Mikoshi-nyudo's true identity is unknown, but in some areas, he is believed to be a shape-shifting weasel, fox or tanuki.

见越入道的真实身份仍是未知，但有些地区的人们相信他是由黄鼠狼，狐貍或貍变的。

youdao

While it is unknown just how much of this is true, it is certainly known that silk cultivation has existed in China for several millennia.

虽然我们不知道这其中有多少是真实的，但可以肯定的是，丝绸栽培在中国已经存在了几千年。

youdao

Its true shareholders are unknown, and Carlos Pascual, then U.S. ambassador to Ukraine, remarked at a conference in Kiev that he feared it was connected to organized crime.

FORBES: Magazine Article

"However, the true cost of adverse incidents remains unknown because the treatment costs of remedying the harm caused to patients or clients are not routinely measured, " the office added.

BBC: Surgeon

The true size of the universe is still unknown.

ECONOMIST: In praise of astronomy, the most revolutionary of sciences