基于信息扩散的结果，计算了以年为周期的重大火灾发生次数的超越概率分布，建立了一种重大火灾频度估算方法。
Based on the results of information diffusion, the probability of the num: her of the serious fires per annum can be fitted with the Gaussian distribution.
火周期的延长会引起森林可燃物载量增加，并导致火频度、火灾类型和火强度发生改变。
The longer fire cycle can cause the fuel loading increasing and change fire frequency, fire type and fire intensity in the forest ecosystem.
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