sampling unit是什么意思

用法例句

Directed multi-level sample successive elimination Algorithm;

方向性多层抽样继承排除全搜索算法

The application of sample in incremental update of sequence pattern;

抽样技术在序列模式增量更新中的应用

The Method for Data Mining Based on Entropy Theory and Sample Test;

基于信息熵理论和抽样测试的数据挖掘

Sampling and acceptance of shaped refractory products;

定形耐火制品的抽样与验收

Development algorithm of single sampling inspection plan of pass-fail experiment;

成败型一次抽样检验方案算法的等价变形

The sampling and application way of the inspection on mechanical and electrical products on the same productive state;

相同生产条件下机电产品检验的抽样方法与实施程序

Extension of two useful results in two-stage sampling and its applications;

对二阶抽样中两个定理的扩充及其应用

Based on the calculations in simple random sampling,stratified random sampling and two-stage sampling,it is shown that when the sampling size of two-stage sampling is 1/2 that of simple random sampling,the mean square error is much smaller than that of simple random sampling.

在通过对简单随机抽样、分层随机抽样和二阶抽样的实例计算之后,证明二阶抽样在抽样样本量为简单随机抽样的1/2时,其样本方差远小于简单随机抽样的样本方差;在样本量与分层随机抽样相同的情况下,其样本方差也要远小于分层随机抽样方差,提高了抽样数据的可信度和精度,从而肯定了二阶抽样方法对于数控机床可靠性研究中数据抽样问题的适用性,节约了抽样成本。

Based on the precision and the cost of the relationship between the use of conditional extremum for the function of several variables method to determine when the first sample for sampling with probability proportion to size,the second-simple random sampling,the two-stage sampling is optimal allocation.

本文根据精度与费用之间的关系,利用求多元函数条件极值的方法,确定当第一级抽样为有放回PPS抽样,第二级抽样为简单随机抽样时,二阶抽样的样本容量最优分配。

Spatial dispersion pattern and sampling method of sweet beet (Spodoptera exigua (Hübner)) larva in green Chinese onion fields;

甜菜夜蛾幼虫在大葱上空间分布型及抽样方法

Through analysis of typical instances, shortcomings that existing in GB 5491-1985 percentage sampling method for wheat flour in bags in inspection and supervision were pointed out.

在实际工作中，通过典型事例分析，指出在监督检验中，袋装小麦粉按ＧＢ５４９１—１９８５ 百分比抽样方法存在的缺陷，建议采用ＧＢ２８２８ 标准，以解决批量大小时判别的宽严问

Objective:To explore the sampling method of telephone survey.

目的:探讨电话访问的抽样方法。

Discussion on concrete strength quality control and seasonable method of sampling inspection;

混凝土强度质量控制及其合理抽样检验方法的探讨

Concrete flexural strength sampling inspection for airport pavement;

机场道面混凝土抗折强度抽样检验(续)

Research on Sampling Inspection Methods of Residential Watt-hour Meter in Use and Its Empirical Analysis;

在线民用电表抽样检验方法研究与实证分析