取样误差

The relationship between the sample mass and the number of particles were investigated for different sampling modes (sampling by mass and sampling by the number of particles).

按质量取样的误差理论的提出，解决了长期以来人们在考虑按质量取样的误差时所必须进行的近似处理的局限性，填补了该领域的一项空白。

The sampling of complicated materials were investigated. The relationship between the composite sampling variance and the number of increments was studied. The quantitative equation for estimating the composite sampling errors directly from the physical and chemical parameters of the population with multinomial distribution theory was presented. Monte Carlo simulation technique was employed to verify the above theories.

对于复杂物质的取样，研究了分层性物质的组合取样误差与份样数目之间的关系；采用多项分布理论，提出了组合取样误差公式，建立了组合取样误差与被研究总体的理化参数(如组分含量、质量分数等)之间的定量关系，通过Monte Carlo模拟技术对此进行了验证。

Because of random sampling error, it is impossible to learn the exact value of b using only the information in the sample.

由于随机取样误差的存在，我们不可能通过样本知道b 的准确值。

Several even ts,that affect genetic variation during ecological restoration,such as sampling error and small population size (bottleneck or founding event and subsequent inb reeding and genetic drift),were extensively discussed.

分析 了生态恢复过程中影响种群遗传变异的因素，主要有取样误差和小种群效应(主要是瓶颈或建立者事件及其以后的近交和漂变)；在进行生态恢复时也要考虑局部适应，对影响种群局部适应的因素也进行了分析。

It does not have a sampling error.

它不存在取样误差。

This calls into question the utility of this technique in reducing sampling error to identify SIM.

因此，对EME技术的应用可降低识别SIM的取样误差的说法值得商榷。

The margin of sampling error was plus or minus 4 percentage points for teens and 3 for adults.

青少年的取样误差在正负4%，成年人在3%。

This mapping can introduce sampling inaccuracies at texel boundaries.

得到的纹理地址被舍入到最近的整数，这种映射方法在texel边界会产生取样误差。

Taking particulate material as an example, the effect of micro-homogeneity of the material on the sampling error was investigated. The variation of the analyte contents with the grain sizes, and the possibility of stratifying the population by the grain sizes were studied.

以粒状物质为例研究了物质微观均匀度及其对取样误差的影响，探讨了被测组分含量随颗粒粒度的变化规律，研究了按粒度对物质进行分层及分层取样的可行性。

Investigation on the sampling error of two-component Particulate mixture is very essential to the general theory of sampling for chemical analysis.

本文对二元颗粒混合物按质量取样的误差进行了深入研究，详细分析了混合物的各种参数对被测组分含量取样误差的影响，应用MonteCarlo技术对取样进行了模拟。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。