在1990年人口普查中，美国人口普查局专门专门组织了一次旨在总结普查经验的抽样调查，以查明人口普查遗漏(重复)的原因。
During 1990 census, American census Bureau organized a sampling survey for concluding experience of census to find out omitted or duplicated reasons belonging to people.
重权数方法与重抽样方法类似，也是利用计算机的优势通过重复获得大量不同的子样本的重权数估计目标参数的估计量和方差估计量，是一种稳健、通用、有效的方差估计方法。
Replicate weight, which is similar with replicated sample method, gets a lot of replicated weights to obtain the estimators by computer, it is also a robust, common and effective method.
像元结构对输入图像的抽样使联合变换功率谱和相关输出是空间周期性重复的。
The present method is achieved with an amplitude gray-scale spatial light modulator (SLM) as the image input device and based on double exposure holographic phase-shifting interferometry.
像元结构对输入图像的抽样使联合变换功率谱和相关输出是空间周期性重复的。
The present method is achieved with an amplitude gray-scale spatial light modulator (SLM) as the image input device and based on double exposure holographic phase-shifting interferometry.
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