mean sample tree 中央木 standard error of sample mean 样本平均值的标准误 sampling distribution of sample mean 样本平均值的抽样分布 distribution of mean of sample 样本均值的分布 相似单词 precision n.[U] 1.准确(性); 明确(性); 精确(性) 2.精密(度) Sample n. 示例,字样 n. 样品,标本...
Chemistry, Physics.the extent to which a given set of measurements of the same sample agree with their mean.Compareaccuracy(def2). adjective of, relating to, or characterized by precision: precision swimming; precision instruments for aircraft. ...
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What does preciseness mean? Preciseness denotes the exactness and clarity of an expression or measurement. 15 What is precision? Precision refers to the consistency and closeness of multiple measurements to each other. 14 Can a measurement be precise but not precise? Yes, measurements can be consis...
MAP(Mean Average Precision)：单个主题的平均准确率是每篇相关文档检索出后的准确率的平均值。主集合的平均准确率(MAP)是每个主题的平均准确率的平均值。 MAP 是反映系统在全部相关文档上性能的单值指标。系统检索出来的相关文档越靠前(rank 越高)，MAP就可能越高。如果系统没有返回相关文档，则准确率...
The mean life of the positive muon has been measured to a precision of 11 ppm using a low-energy, pulsed muon beam stopped in a ferromagnetic target, which was surrounded by a scintillator detector array. The result, taumu = 2.197 013 (24) mus, is in excellent agreement with the ...
aIn terms of precision and long-range penetration the MONOLIT-32 is inferior to the AP-20, but at shorter ranges they are almost equivalent, as at 10m the MONOLIT-32 penetrates a 6mm steel plate. 根据精确度和远程渗透MONOLIT-32是下等对AP-20,但在更短的范围他们是几乎等效的,和在10m MONOLIT...
Repeated diving along transect lines from 5 to 35m resulted only in small deviations independent of water depth indicating the precision of the method for monitoring studies. Routing of given reference points with a Garmin 76CSx handheld placed in an underwater housing resulted in mean deviances ...
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With existing data, the formal error which can be achieved is of the order of 5 cm rms, for a regional, yearly averaged, mean sea surface, and 50 cm rms for continental ice. These errors are likely to improve further as better orbits and corrections are made available. This suggests ...