The paper discusses applying grey theory to power load forecasts, design equal-dimension and new-information model, and illustrate appropriate size of the sample on the basis of practical data.
文中将灰色理论应用于电力负荷预测，设计了等维新息模型，并根据实际数据说明了样本的合适长度。
In this paper we study the size and the power of permutation test and compare them with those of other test methods under small sample size.
目的 ：论述病例 对照研究设计中样本大小与统计功效估计方法。
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