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- The ratio of sample size to population size. 抽样规模与人口规模的比率。
- ratio of sample sizes 样本比例
- The test results indicate that the sample effect is neglectable if the ratio of the sample size to the maximum size of the coarse-grained material is large. 结果表明:当试样与粗粒料最大粒径之比大于一定值时,试样缩尺的影响很小;
- Investigates the survey manner, sampling method and calculation of sample size. 就调查方式、抽样方法和样本容量的计算进行了探讨。
- Objective Explore the method for the estimation of sample size in two stage cluster randomization tirals. 目的探讨两阶段整群随机化设计两组比较样本例数估计方法。
- Estimation of sample size must be completed before the sample of post-enumeration quality survey is drawn. 样本量估计是抽取事后质量检查样本之前必须要做的一项工作。
- A new computational formula of fiducial probability in consideration of sample size and subsample standard deviation is derived from the least squares principle. 利用最小二乘原理,推导出考虑样本容量和子样标准差的求解置信概率的函数,继而确定数据的置信区间,对数据进行筛选。
- Experiments on engine show that, with the increasing of sample size, error classifying decreases continuously and finally, it fluctuates smoothly in some ranges. 结果表明,随着学习样本量的增加,该分类器的误判率越来越小,最终在一定范围内呈现平稳波动变化。
- The ratio of students to teachers is 35:1. 学生和老师的比率是三十五比一。
- With the content of nuciferine as the marker, the optimized adsorpting conditions including the ratio of dia-height, the dynamic adsorpting capacity, the concentration of sample, the velocity of adsorption and the leak curve were studied. 本课题从九种大孔吸附树脂中进行筛选,从中选择一种吸附性能最好的树脂进行研究,以荷叶碱含量为指标,通过对径高比、动态吸附量、上样浓度、吸附流速及泄漏曲线的考察,优选出最佳吸附条件;
- The ratio of schoolboys to schoolgirls is 2 to 1. 男学生和女学生的比例是2比1。
- Men outnumber women here in the ratio of three to one. 此地男子数量以三比一超过女子。
- He dipped into the bag and brought out a handful of sample wheat. 他把手伸进袋里,取出一把小麦样品。
- The results showed that many factors influenced the American drop weight impact test,such as temperature,sample size and the moulding process of samples. 结果表明,美式落锤冲击试验受很多因素(如温度、试样尺寸和试样的成型工艺)影响。
- In front-end electronics of PET,in order to restrain noise and improve Signal Noise Ratio of sampled data,a passive second order RC filer is designed. 为了减小PET前端电子电路中信号的噪声干扰,提高信号的信噪比,本文设计了一个二阶无源RC滤波器。
- Comparison variations of trials sample size. 比较取样数量多寡之变化。
- According to the ratio of the number of support vectors to the number of samples in each time window,epsilon is adjusted to handle time-varying noise of system. 提出一种时间窗内?着可调的支持向量回归方法,根据各时间窗的支持向量的比例动态调整?着,能够处理噪声时变的回归问题。
- On the other hand, indirect method, as a statistical method, has overcritical requirement for sampling size, but not for the selecting of samples. 间接法作为一种统计方法,对样本点的选取条件相对宽松,但对样本数量有一定的要求。
- The ratio of men to women was two to one. 男女的比例是二比一。
- The ratios of 1 to 5 and 20 to 100 are the same. 1与5之比和20与100之比相同。