采用逐步回归方法建立了草地头火速度、火强度、火烧迹地形状的预测模型。
A predictive model for head fire speed, fire intensity, and shape of burning site in grassland were established by step statistical method.
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.
测试结果表明，聚氨酯泡沫保温层具有重量轻、强度高、吸水率低、保温效果好、离火自熄等特点；
It is showed in the test result that polyurethane foam heat-insulation layer has advantages such as weight light, strength high, absorbing water rate low and high heat -insulation effect and so on.
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