"The airplane almost becomes a living organism this way," Krein says.

“这样飞机几乎变成了一个有机体”Krein说。

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Then, by introducing a corresponding Krein space stochastic system and applying projection and innovation analysis, the minimum of indefinite quadratic form and its existence condition are derived.

引入相应的格林空间随机系统，应用格林空间投影理论和新息分析方法，得到了不定二次型的最小值及其存在条件。

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