太阳活动周期的稳定性与伪周期
Stability of cycle in samplogram and spurious cycles in solar activity
摘要：
由于非平稳信号在频谱上会产生显著的峰值，因此具有随机显著性的谱分析方法不能有效地区分伪周期。我表明，在太阳活动的极大值和极小值之间的随机分离，可以使一个虚假的，但显着的频谱峰。通过对随机信号应用平均下采样和差分，甚至可以拾取弱稳定周期。这是因为两种操作都不同地改变频谱中的峰值高度，并且寄生周期在两种操作中又是不稳定的。我介绍了一个sampogram显示这些操作和稳定性直观。
英文摘要：
The spectral analysis with stochastic significance cannot distinguish the spurious cycles effectively, because a non-stationary signal can make a significant peak in spectrum. I show that the random separation between the grand extremes such as grand maxima and minima in solar activity can make a spurious but significant peak in spectrum. And it is possible to pick even the weak stable cycle by applying an averaging down-sampling and the differencing to a random signal. This is because both operations variously change the height of peak in spectrum and the spurious cycle is in turn unstable in both operations. I introduce a samplogram showing these operations and stability intuitively.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
