释文:地球化学采样是将地面划分为若干采样单元,在每一单元中采集1个或数个样品,以样品中的含量来估量整个单元内元素含量的平均值。这就不可避免地发生采样误差。
... 实验室抽样误差 laboratory sampling error 采样误差 sampling errors 取样误差 error of sampling; sampling error ...
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哈里斯互动表示该调查结果会有正负1.2个百分点的采样误差。
Harris Interactive said the results have a sampling error of plus or minus 1.2 percentage points.
单台采样速度可控制在2秒左右,多台同时采样误差较低;
The sampling speed of one unit can be controlled in 2 seconds , and many use together can reduce error.
改进后的聚类结果既消除了采样误差,又保持了云类样本的基本特征属性。
Therefore, the improved FCM clustering results can reduce the sampling errors and retain the main attributes of cloud classification samples.
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