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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This paper studies the relaxation in the two—Level system of the Laser superradiation interacted with radiation by the method of coherence, and gives the solution of light field about sgn.

用相干态方法研究了与辐射相互作用的超辐射激光二能级系统的弛豫，给出在光场高温和低温两种极限情况下准几率密度函数方程的解。

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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