In this paper, by the analyses about the strategy of the combination hedge in futures markets and its risk, we get least squares estimation of the hedge ratio and its risk.
对期货市场组合套期保值策略和保值风险进行了分析，给出组合套期保值率的最小二乘估计和保值风险的估计。
For a surveyed gravity anomaly, the combination of some squares is taken as the initial model.
对于一个实测的重力异常，先用若干方格的组合作为初始模型。
For a surveyed gravity anomaly, the combination of some squares is taken as the initial model.
对于一个实测的重力异常，先用若干方格的组合作为初始模型。
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