AR5395及AR6659的贮能释能周期性

本文分析了了AR5395和AR6659的X射线耀斑活动周期性，耀斑强度周期的存在表明活动区的能量积累和释放过程具有可重复性，包括贮存的能量大小也具可重复性，计算得出AR5395的耀风强度周期为24．49小时，而AR6659的周期为57．39小时，耀斑指数按周期的分布证明在一个贮能周期中活动区贮存的能量大致相同，周期内的平均耀斑指数代表能量积累效率，AR6659较之AR5395有较长的能量积累周期和较高的能量积累效率．此外，本文还讨论了耀斑事件出现的周期．这种周期的长短代表活动区磁结构对于耀斑出现的稳定程度，并且，当活动区处于较高能量状态（即相对势场状态的偏离较大）时，出现耀斑不稳定性的可能性增加。

The Periodicity of Energy Storage and Release in AR5395 and AR6659

The periodicity of X-ray flare activity in AR5395 and AR6659 has been analysed in this paper. The existence of the intensity period of flare activity shows that the processes of energy storage and release in an active region have repeatability, including the magnitude of the energy stored has the repeatability. From our calculation the period of fiare intensity for AR5395 is 24.49 hours, and 57.39 hours for AR6659. The distribution of flare indexes versus periods suggests that the energy stored within each period in an active region is approximately identical. The mean flare index in a period represents the energy building-up efficiency. In AR6659 there is a longer intensity period and higher energy storage efficiency than in AR5395. In addition, the occurrence period of fiare events is discussed, the length of occurrence period shows the stability of magnetic field structure in terms of fiare activity in a region, and when the active region is at a higher energy state, the probability that flare instability arises will increase