NIS+ also extended the naming system so that databases were placed into a tree structure rather than a single domain, allowing for much more complicated and wider-ranging distribution.
NIS+ 还对命名系统进行了扩展，因此数据库将放入树形结构中（而不是单个域中），以便允许更为复杂、范围更广的分布。
That could be extended to all discrete random variable and vector with the infinited countable distribution series.
并且将它推广到任意具有可数无限分布列的离散型随机变量和随机向量。
Finally, the asymptotical distribution of the smoothing estimator related to the extended moment estimator is derived by the study of process before.
最后根据对前面过程的研究得到了推广矩估计量的平滑估计量的渐近分布。
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