摘要
为了改进用椭圆模型预测火场蔓延时．火场各部位的位置难于确定的问题．提出了一个林火蔓延的数学模型──抛物线─半圆形模型。得出了用该模型预测火场面积、周边长度以及面积、周长的增长速度的公式。用该模型预测林火蔓延时主要使用火头的蔓延速度，因而依赖参数少，当原火点不动时，又能确定林火蔓延后各部位的位置，对火场预测是实用的。
It is usually difficult to determine the locations model when predicting the spreading of fire sites. To make this easier, in this essay. a mathematical model of the spreading of forest fires. parabola-semicircle is given and the formula of predicting the area of fire sites, perimeter length with this mathematical model is obtained. To predict the spreading of forest fires with this model mainly concerns the spreading velocity of the head of a fire, thus few parameters are used to determine the locations of every part of the fire after the spreading of the forest fire when the original fire point keep still. Therefore the model is practical when predicting fire sites.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1994年第2期31-36,共6页
Journal of Northeast Forestry University
基金
林业部防火基金
关键词
林火
数学模型
预测
Forest fires
Mathematical model
Forecast
