Pressure transducers are fixed to the inside of the faces to measure the three principal stresses. Under the assumption that the samplingweights at a specific level are independent ofthe random effects at that level, Pfeffermannet al. (1998) adopted the following procedure.Consider the case of a two-level model. Denoteby wi the weight attached to the i-th level-2 unitand by wj| i the weight attached to the j-th level1 unit within i-th level-2 unit of the IU is known to be the lost queen
正在翻譯中..
