Aiming at the problem of software system reliability and cost distribution, an optimal model for software component cost distribution based on reliability is proposed.

针对软件系统可靠性和费用分配问题，给出了一种基于可靠性的软件构件费用分配最优模型。

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Based on the comprehensive reading of references about distribution network planning and reliability, the thesis presents the study of distribution system optimal planning and reliability analysis.

本文在广泛阅读国内外配电网可靠性分析和规划的有关文献的基础上，总结前人的研究成果，针对配电网的可靠性分析和优化规划进行了研究。

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By using this method the economic cost for improving system transient stability can be calculated, and the economic cost can be applied to the study of optimal reliability indices.

此方法能用于计算为提高电力系统暂态安全性而须付出的经济代价，经济代价可用于最佳可靠性指标研究。

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