利用分支理论分析了非平凡周期解的存在性。

Further, the existence of a nontrivial periodic solution is considered by using bifurcation theory.

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运用分歧理论，隐函数定理，以及渐近展开的方法，获得了非平凡周期解的存在性。

The existence of co-exist periodic solution is investigated by using the bifurcation theory, the implicit function theorem and the method of asymptotic expansion.

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本文研究了具有时滞的细胞神经网络周期解存在性和平凡解的稳定性问题。

In this paper, the problem of periodic solutions and stability of Cellular Neural Networks with delay is studied.

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