They are mainly Landscape Ecology model and Dynamic Changing model of Land Use.

主要有景观生态学模型和土地利用动态变化模型。

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Of these representations, hierarchical dynamic simplification can continuously refine a LoD model at run time according to changing view point.

基于层次结构的动态简化方法能够根据视点的变化，实时连续地转换场景细节模型。

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By adjusting dynamic fuel pump rack position, closed loop of engine speed in suddenly changing of load was realized in this model. It could keep engine speed stability in different status of engine.

通过动态调整油泵齿条位置实现对柴油机突变负载下转速的闭环控制，从而保证在不同工况下转速的稳定性。

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