The results showed that the dailyyield of China' s stock market had obvious heteroscedasticity, volatility, aggregation, sustainability and leverage effect.
分析结果显示：我国股市日收益率具有明显的异方差性、波动性、聚集性、持续性和杠杆效应。
2
Proppant back-production prediction software is also present in this paper, which can determine the critical gas flow rate and critical dailyyield for proppant flowing back.