First, the partial differential equations are transformed into discrete space, discrete time nonlinear difference equations through characteristic method and finite difference approach.

首先，通过特征线法和有限差分法得到了时间离散和空间离散的非线性状态方程。

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"But I think the committee made a mistake in giving the prize so soon,frankly, because it somewhat discredits and cheapens the whole notion of the Peace Prize because we haven't yet seen if this Obama approach really is going to make a difference in solving problems.

VOA: standard.2009.10.09

They are sick of Washington's harsh and cynical hyper-partisanship, but they do not have a split-the-difference approach to politics.

CNN: Commentary: Obama losing independent voters

Indeed, the names given to their missiles by the two countries reflect the difference in approach.

ECONOMIST: Asian security

Is some of this just a core difference in approach in terms of how we move this forward between Democrats and Republicans?

WHITEHOUSE: President Obama News Conference