全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Rebecca N. Hann , Heedong Kim , Yue Zheng
来源:[J].Review of Accounting Studies, 2019, Vol.24 (3), pp.927-971Springer
摘要:Abstract(#br)We examine whether there is intra-industry information transfer with respect to the second moment of returns around earnings announcements. Using implied volatility from option prices to proxy for uncertainty about firm fundamentals, we find a significantly posi...
作者:Heedong Kim , Hungsok Park ...
来源:[J].American Journal of Electrical Power and Energy Systems, 2018, Vol.7 (5)SciencePG
摘要:This research shows that all of the insulation characteristics (insulation resistance, partial discharge, dissipation factor, and alternating leakage current) of HV motor become worse at high temperature. It is also shows that partial discharge and insulation resistance are reduc...
作者:Heedong Kim , Joo-Hee Jun ...
来源:[C].SPIE OPTO2006SPIE
摘要:Trichromatic LED backlights render higher color gamut and panel transmittance to the liquid crystal displays (LCDs) than yellow phosphor-converted white LED backlights can possibly do at their best. In realization, however, several technical challenges arise, such as color mixing...
作者:... Wiedenbrug, E. , Teska, M. , Heedong Kim
来源:[C].Energy Conversion Congress and Exposition (ECCE), 2012 IEEE2012IEEE
摘要:Rotor axial air ducts are used in large motors for cooling and reduction of weight and material. The rotor axial ducts can produce twice slip-frequency, 2sfs, components in the vibration, or current spectrum that can be misinterpreted as induction motor rotor faults. T...
作者:... Dongsik Kang , Jintae Cho , Heedong Kim
来源:[J].Dielectrics and Electrical Insulation, IEEE Transactions on(IF 1.36), 2012, Vol.1 (1), pp.53- 60IEEE
摘要:Turn insulation degradation is one of the major root causes of stator insulation failure leading to motor breakdown. The surge test is the only test available for testing the integrity of turn insulation; however, it is a high voltage pass/fail test that provides an indicati...

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