In this paper, we analysis the defects of least variance method, and advance a least second moment method of the futures hedging.
在本文我们分析最小方差法存在的缺陷，提出了套期保值的最小二阶矩方法。
The objective appraisal method of clustering analysis, variance coefficient, combined with comprehensive appraisal of distance is advanced in the paper.
提出将聚类法、变异系数法与距离综合评价法相结合的客观评价方法。
The simple factor analysis of variance and further statistical method of multiple comparison and independent exponent t-test were used.
运用单因子方差分析及进一步的多重比较、立样本t检验的统计方法。
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