系统抽样

Methods The study was performed by systematic and cluster sampling and questionnaire.

采用系统整群抽样的方法，以填写调查表的形式进行问卷调查。

Methods To use the methods of delamination and systematic in 8212 persons in the urban districts of Xuzhou.

利用分层整群抽样和系统分析的方法。

Worse, you can't rely on sampling because the system is discontinuous.

更糟糕的是，你还不能依靠抽样的方式来对系统进行测试，因为它是非连续的。

Importance sample method has the potential applied value in computer simulation of error control systems.

重要性抽样方法在差错控制系统仿真中有潜在的应用价值。

The examples show how to have a accordant test in interal control system by means of fixed sample size sampling and the testing of estimation of difference in variable sampling was explained by examples.

现代审计的主要标志之一是审计方法的改进，在评价内部控制系统为基础的审计中采用了统计抽样的方法，提高了审计效率，保证了

In this thesis, a series of the problems of stochastic simulation for geomagnetic field was investigated.

完整的随机模拟包含统计模型化，模拟抽样和模拟推断三个部分，本文比较系统地研究了地磁场随机模拟的若干问题。

Yet it's hard not to assign blame to the industry's decades-old system of peer review that again showed its ineffectiveness on Jan.

但是，不谴责行业的跟不上时代的抽样复查系统是很困难的，它在1月3日再次表明了他的低效率。

Multi-stage random sampling method is used, and the sample size is 750 persons in total.

采用多阶段系统随机抽样的方法，抽取750人进行入户调查。

Two kinds of DPA estimators are given by way of Nonstandard Analysis andprobability parameter sampling,respectively.One kind of DPA algorithm,based on a sample pathof GI/GI/l system,can estimate simultaneously EST and expected busy period length gradient.

分别从非标准分析和概率参数抽样方式的角度建立了两类DPA估计量，特别地，前一类DPA估计量可以同时估计顾客的期望系统时间和忙期期望长度的梯度。

The first CATI system was developed in America, in the middle of 70's. They used CATI to help them to design survey, and to perform the probability sampling.

CATI系统发展最早在美国，约从1970年代中期开始，他们将统计中的机率抽样以电脑程式表现，藉以提高调查回收率。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。