The causes of degeneration and death of the SGN in acoustic trauma are as yet not completely known.

噪声通过机械、代谢和血运等途径损伤毛细胞的机制已基本明确，但SGN的变性死亡的原因还不清楚。

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The integration uncertain border value is estimated by fuzzy inference and the soft switch control is accomplished by tanh (x) function replacing SGN (x).

根据模糊推理估计集成不确定边界，利用双曲正切函数代替符号函数实现软切换连续控制。

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The facility in Johnsdale, Oxted, was installed by Southern Gas Networks (SGN) in December.

BBC: The gas governor in Oxted

An SGN spokeswoman said emergency engineers had been on-site working around the clock to repair the leak.

BBC: Southeastern: Southern Gas 'too slow' over Kent gas leak

" also from SGN, includes the same frenetic action, but set in the jet age, rather than World War II, like "Skies.

FORBES: SGN's 'Skies' To Sell iPhone Pilots Virtual Guns, Planes