The problem of interval estimation of earthquake prediction is discussed, based on the theory and method of interval estimation of extremum distribution.

在提出极值分布区间估计理论和方法的基础上，讨论了地震预报中的区间估计问题。

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This article discusses the optimum interval estimation and fully proves the existence of the optimum interval estimation, simultaneously proposes a method to seek the optimum interval estimation.

文中讨论了区间估计的最优性，并证明了最优区间估计的存在性，同时给出了一种寻求最优区间估计的方法。

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Then, determination method of fractal parameters and scale-invariant interval is given and influence of transform order on the estimation of fractal parameters is also discussed.

其次，给出了分形参数的提取方法和无标度区间，并分析了变换阶数对分形参数估计的影响。

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