According to data provided by doctor, under the assumption that sample is normal, performed frequency analysis, pair test and variance analysis.
针对医生提供的数据，在样本服从正态分布的假设下，进行了频数分析、配对检验和方差分析。
The experiments results shown that the effect of rotational speed variance on the desalination and its efficiency wer. e obvious under same experiment condition.
实验结果表明，在实验条件相同的情况下，离心转速的变化对灰白冰的脱盐、脱盐效果均有显著影响。
The state vectors expectation, variance and covariance matrices are given under the conditions of the systems with regular infinite extreme point and singular infinite extreme point.
在系统具有正则无穷远极点和奇异无穷远极点的条件下，得到了系统状态向量的均值、方差阵及协方差阵的计算公式。
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