We prove the model exists unique solution.

我们证明此类模型解存在唯一。

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Moreover, for some Special cases, it is proved that there exists unique equilibrium solution and it is global asymptotically stable.

在适当条件下，证明了平衡解方程有唯一解且是全局渐近稳定的。

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It is well known that for a smoothing functional there exists a unique minimizing solution determined by a minimal function equation.

然而，直接求解由此得到的极小元素所满足的方程有较大的困难。

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