1·The distinction between covariance and contravariance is important for computations with tensors, which often have mixed variance.
协变和逆变的区别对于张量的计算尤为重要，这往往会出现混合方差。
2·For all of the above discussion to be practical, the team must find a way to compute the variance of the project parameters.
要想将上面所讨论的所有内容都成为可实行的，团队必须找到一个计算项目参数方差的方法。
3·In particular, the team can estimate the three values — lowest, nominal, and highest estimations — assuming that the risk was removed, and then apply these values to reestimate the project variance.
特别地，团队可以估计三个值——最低、标准和最高估计值——交涉去掉了风险，并且应用这些值重新估计项目方差。
4·For example, a metric that does not correlate to the project cost or duration cannot aid in assessing the variance reduction in the iterations.
例如，与项目成本或持续时间无关的度量标准不能帮助评估迭代中的方差削减。
5·They conflated high food prices with greater food price volatility, which is best defined as variance around the food price level.
他们把高居不下的食品价格和幅度较大的食品价格波动(最好定义为食品价格水平的方差)混为一谈。
1·I mentioned the potential variance caused by the choice of prefixes.
我提到了前缀选择造成的各种可能的变化。
2·This reduction in uncertainty also reduces the variance in estimations, since there is a direct correlation between these factors and the ability to produce sound estimates.
这种不确定性的削减还减少了估计中的变化，因为在这些因素和生成可靠估值的能力之间存在直接的关联。
3·The new individual will, in theory, be as fit as the parents, plus or minus a small variance caused by the mutation.
理论上说来，新的个体是和双亲一样适应的，由于变异或增或减会有些微小的变化。
4·We approximate the free memory after a garbage collection cycle by using algorithms that analyze the variance of free memory statistics.
通过使用分析可用内存统计信息变化的算法，我们可粗略计算垃圾收集周期之后的可用内存。
5·At the same time, because white noise does not have any recognizable variance, most people eventually don't notice they are hearing anything at all.
同时，因为白噪音没有任何可识别的变化，大部分人最终没有注意到他们所听到的任何东西。
1·Could it be that variance in brain structure in these conditions contributes to the lack of social pleasure experienced by the patients?
这些疾病中，大脑结构的变异造成缺乏社会愉悦是可能的吗？
2·Populations, random samples. Sample statistics, moments of the sample mean and variance.
母体， 随机样本。 样本统计， 样本平均数和变异数的动差。
3·This research provided techniques for the application, conservation in vitro of excellent germplasm and reduction of heredity variance of autotetraploids of Plalycodon grandiflorum.
本研究为优良同源四倍体桔梗的推广应用和优良种质离体保存、减少遗传变异提供了技术依据。
4·Taking 46 Acer truncatum introduced to Yunnan as the study materials, the variance of 9 fruit characters and the correlation between different characters were analyzed.
以云南引种的46株元宝枫的果实为研究材料，对其果实的9个性状变异和各性状间的相关性进行了分析研究。
5·Conclusion: Early PCI in AMI patients can increase the heart rate variance indexes significantly and improve the prognosis dramatically.
结论：对心肌梗死患者及早行pci，可使患者的心率变异指标显著增加，明显改善患者预后。
1·We simulate the stochastic cycle time and get its mean and variance.
我们模拟随机的周期时间，得到平均值以及变异数。
2·The elementary statistics include the statistics concept, data collection and analysis, estimation and hypothesis testing, analysis of variance, regression etc.
本课程包括统计基本概念、统计资料收集及分析、基本机率分配、估计与检定、变异数分析、线性回归等。