Failure rate and average repair time of input-bus unit were calculated by state Spaces method. Power reliability indices of whole systems were computed by min-cut method.

该方法用状态空间法求解输入母线单元失效频率和平均修复时间，用最小割集法计算整个系统的供电可靠性指标。

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This paper uses the world wide accepted method to collect and analyze the present available data. Average indices of power system units in China during 1995-1999 were provided.

本文按国际通常采用的方法对现有的数据进行了收集、整理和统计分析，给出了我国电力系统元件1995～ 1999五年的平均可靠性指标。

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A new method is proposed to reduce the peak-to-average power ratio of orthogonal frequency division multiplexing system.

提出了一种新的降低正交频分复用系统峰均功率比的方法。

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