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Planetary gearbox is widely used in many fields due to its robustness and high power-weight ratio, but implement fault diagnosis on it is a challenge all the time. This paper proposed a new fault diagnosis method of planetary gearbox based on EMD and EDT. Firstly, the vibration data is decomposed into several IMFs by EMD. Then select sensitive IMFs which contain main fault information depend on the...
This paper investigates the relationship of voluntary disclosure and information quality. A broad sample of 4551 listed Chinese firms is choused excluding financial industries from 2005 to 2008. Considering endogenous problem, we use OLS model and a model of simultaneous equations (2SLS method) to explore the relationship, respectively. Our results indicate that there is a typical endogenous problem...
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