此外，还有一些影响气候的过程，如科学家们不知道如何模拟的土地利用的变化。
Moreover, there are processes that influence climate, such as modifications in land use, that scientists do not know how to simulate.
本文在比较分析了有关ANN设计的方法的基础上，通过反复试验构造了模拟土地利用变化的ANN模型。
Thesis constructs ANN models to simulate land use changes by trial and error on comparing the methods of constructed ANN.
从资金利用和土地利用两个方面模拟出槾桔生产经济效益变化的数学模型，经过技术经济分析，找出槾桔树的最佳经济寿命为树龄33年左右。
Two mathematical models of economic benefit change were simulated. As a result of technical economical analysis, the optimal economic life-span was found to be about 33 years old.
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