...的办法是先 对两个指标先分别计算出分层估计,然后再构造比估计,这时得到的估计量称为 联合比估计 ( combined ratio estimator ) 一、分别比率估计 因为比率估计是有偏估计,只有在大样本情况下,偏倚才会趋向于0,所以 对分层随机抽样来说,如果采用分别比...
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联合国儿童基金会估计,今年在索马里、肯尼亚和埃塞俄比亚将有48万儿童出现严重的营养不良。
The U.N. Children’s Fund estimates 480, 000 children in Somalia, Kenya and Ethiopia will be severely malnourished this year.
联合国儿童基金会估计,今年在索马里、肯尼亚和埃塞俄比亚将有48万儿童出现严重的营养不良。
The U.N. Children’s Fund estimates 480,000 children in Somalia, Kenya and Ethiopia will be severely malnourished this year.
分组判决算法利用检测窗内所有数据帧,在广义似然比准则下对相关模板进行联合估计,进一步压制了模板噪声。
The group decision algorithm based on GLRT principle was utilized to estimate correlation template through all data frames in detection window and could offer better noise suppression.
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