多数自然灾害不会对经济周期产生重大影响。
MOST natural disasters do not have a major impact on the business cycle.
她像濮德培一样用衰退分析来衡量一定时期、周期性的和自然灾害的有关价格影响。
Like Perdue, she USES regression analysis to try to measure the relative impact on prices of the passage of time, seasonality, and natural catastrophes.
基于自组织临界性的理论框架，针对处于周期区与混沌区之间状态的灾害系统，研究其可预测性及预测方法。
Some disaster systems are in a state between cycle region and chaos region. Their predictability and prediction technique are researched based on self-organized critical theory.
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