There is much difference of the soil moisture's spatial distribution and change processing under different vegetation coverage.

不同植被覆盖度下冻土活动层的土壤水分分布及变化过程存在差异。

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Along with the change of market environment, firms and merchants will adjust the time arrangement and spatial distribution combination of transaction in order to achieve the minimum transaction.

交易者将随着市场环境的变化，调整交易时间配置和空间分布的组合，以求达到交易成本最小化。

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Analysis shows that the system not only can quantitatively predicate the spatial distribution and temporal change of the dust, but also the source, density in the air, transfer and deposition.

分析表明，预报系统不仅能定性预报沙尘天气的空间分布与时间演变，而且能定量预报沙尘源地、大气中的沙尘浓度、沙尘的输送以及沉降。

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