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- 2016
一种耦合元胞自动机的改进林火蔓延仿真算法
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Abstract:
针对传统林火蔓延仿真模型在模拟大范围森林火灾时误差大和效率低的问题，对文献[10]的林火模型添加时间修正来提升林火蔓延模拟的准确性，提出耦合地理元胞自动机模拟林火蔓延过程的仿真算法。分析了元胞自动机时间步长对模拟精度的影响，优化时间步长选择，提高了模拟大规模森林火灾的精度及效率。以模拟2006年5月大兴安岭林区森林大火蔓延过程为例验证本算法，发现地理元胞自动机算法中时间步长取整个元胞完全燃烧所需时间的1/8效果最好，林火蔓延模拟结果与实际TM影像解译的火情时空一致性较高，Kappa系数平均为0.6352，准确率平均为87.89%。算法可用于实际林火蔓延过程的重现及趋势预测，且算法可逆
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