说明：  1.加载告警时间excel文件，进行告警事件的时长和发生间隔的统计分析； 2.计算告警事件对之间的互相关系数； 3.讨论相关分析中时间门限的取值对相关性分析结果的影响； 4.对上述两种相关性分别做告警聚类，并图形化显示；
(1., we should grasp the characteristic attributes of alarm information and analyze the time and interval of alarm events. 2. calculate the intercorrelation coefficient between the alarm event pairs; 3., we discuss the influence of time threshold on correlation analysis in correlation analysis. 4., alarm clustering and graphical display were performed on the above two correlations respectively.)