其根本差别只在于保证率频率法是人为地确定频率，而综合历时曲线法本身固有一个频率。
The substantial difference lies in that guaranteed rate frequency method determines the rate artificially, but synthetic duration curve method has its intrinsic frequency.
本研究的贡献在于，以历史法和统计法等多种方法相结合，廓清了清代江西解元和举人分布的共时态、历时态特点。
Contribution of this dissertation is to comb out the Characteristics of distribution of Jie-yuan and Ju-ren in Jiangxi with a conjunct method of history and statistics.
讨论了采用年多个样法选样时，城市短历时暴雨的指数分布的统计特征。
The statistical characteristics of exponential distribution of urban short-duration rainstorm are studied when the rainstorm series are chosen by annual multi-sampling method.
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