本文针对我们提出的扩散模型——更替性技术创新扩散系统随机演化模型，对其参数做深入的研究。

This paper aims at detailed study of the parameters of the stochastic evolutionary model of the substitute technological innovation diffusion.

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利用概率分析和随机模型的密度演化方法，导出了系统的一些新的可靠性指标和最优检测策略。

The new system reliability indices and the optimal inspection policy are obtained by using probability analysis and the density evolution method in stochastic.

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第二部分，为进一步探讨无标度网络的形成机制，我们研究加点、加边、重连和去边四种演化过程的随机网络模型。

In the second part, in order to explore further the mechanism responsible for scale-freenetworks, we introduce two extended models of the Barabási ?Albert model.

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