本文研究一类随着食物量的增加捕食者捕食速度的变化率起变化的种群模型。
In this paper, the population model which the velocity of the preying rate of the predator population changes when quantities of the prey population increase is concerned.
暗化程度和折射率改变随激光强度、扫描速度、扫描行间距变化而变化。
Darkening and refractive index change varied with laser intensity, scan speed and line interval.
其中交通运输用地和牧草地的变化速度最大，年变化率分别为10.1%和5.5%。
The speed of the transportation land and the grassland are the biggest, whose annual variance ratio are 10.1% and 5.5%.
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