It argues that there is not the day-of-the-week effect in return rate series but one to two weeks of contingency, while there is the day-of-the-week effect and persistency in volatility, and the trading volume is helpful to interpret the volatility.
分析认为,深市日收益率序列不存在每周不同天效应,但存在 12星期的记忆性;波动率序列则存在每周不同天效应和持续性;同时,交易量对波动率具有很好的解释作用,而波动率则不对交易量具有解释作用。
参考来源 - 深市波动率特征分析·2,447,543篇论文数据，部分数据来源于NoteExpress
同义词： doggedness perseverance persistence tenacity tenaciousness pertinacity
以上来源于: WordNet
PHP Object Persistent Database. PODB is implementing persistency by reachability approach.
PODB是通过可通性的途径实现持久性的。
One way to partition the work is according to the issues you need to resolve, such as persistency or reporting.
一种划分的方法就是依照您需要解决的问题，比如持续或者报告。
External file storage is more flexible but does not benefit from database-managed persistency and integrity.
外部文件存储更为灵活，但是无法从数据库管理的持久性和完整性中获益。
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