因此，由于在新知识的获取方面进行合作交流，方差随着时间减少了。
Hence, the variance diminishes over time due to collaborative interaction on new knowledge acquisition.
该方法基于一个隐含的假设，即可以肯定地做出计划：也就是，持续时间的方差非常低。
It is based on the implicit assumption that the plan can be made with certainty: i.e., that the variance of the durations is very low.
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。
For example, a metric that does not correlate to the project cost or duration cannot aid in assessing the variance reduction in the iterations.
减少方差需要协作，但较多的协作导致员工花费较多时间交互，而很少的时间生成规划工件。
Reducing variance requires collaboration, but more collaboration results in more of the staff effort being spent interacting and less on the generation of the program artifacts.
假设估算的任务持续时间是3个月，并且估计的方差是1 个月。
Suppose the estimated duration of a task is 3 months, and the variance of the estimate is 1 month.
回到此实例，如果估算中的方差是0.1，任务的90%的可信度的日期是3.15个月并且99%的可信度日期是3.3个月，在持续时间上只有10%的增长。
Going back to the example, if, the variance in the estimates is 0.1, the 90% certainty date for the task is 3.15 months and the 99% certainty date is 3.3 months, a mere 10% increase in duration.
估计项目的成本、工作，和持续时间，以及其方差。
Estimate the project's cost, effort, and duration, along with its variance.
因此，评估可由广义自回归条件异方差(GARCH模型)，这可能使避险比率意味着出随时间变化。
Therefore, evaluation could be carried out by means of Generalized Autoregressive Conditional Heteroscedasticity (GARCH), which could make hedge ratio vary with time.
本文通过试验和方差分析，研究了不同盐类及其浓度和浸泡时间对鱿鱼肉片保水性的影响。
In this paper, the effect of different salt and its solution and immersing time on holding water capacity of squid fillet was studied by test and variance analysis.
由于该模型被认为是最集中反映了金融市场数据方差变化的特点而被广泛应用于金融数据时间序列分析中。
Because these models can reflect the feature of the financial market well, they have been widely applied in the time series analysis on financial data.
本文所研究的这种波动性指的是资产收益的方差随时间不断变化，这在计量经济学中称之为异方差问题。
Volatility in the article is the variance of asset return, which varies with time going, and this is also called heteroscedasticity in Econometrics.
本文的目的在于，对于线性平稳时间序列的样本、自协方差、自相关和偏相关函数的渐近性质，给出一个比较系统的描述。
The aim of this paper is to give a systematic account of asymptotic properties of the sample autocovariance, autocorrelation and partial autocorrelation functions of linear stationary time series.
结果表明：色散随机变化增大了暗孤子到达检测窗口的时间抖动方差而降低了暗孤子传输系统的容量。
The results show: the stochastic dispersion variation apparently leads to the time jitters and reduces the capacity of the dark soliton transmission system.
拟合与时间相关的QTL基因型的期望均值向量和剩余误差的协方差矩阵是动态性状功能定位的核心内容。
Modeling time-dependent expected mean vectors of QTL genotypes and the structure of the within-subject residual covariance matrix are the essence for functional mapping QTL of dynamic traits.
用最小方差准则来评价控制器的性能，仅需过程变量的常规闭环操作数据和过程的时间延迟特性。
It only needs routine closed-loop operating data and knowledge of the process time delay using minimum variance as a benchmark in controller performance assessment.
在对某一产品进行试验后，根据原始数据进行方差分析是件烦琐的工作，需要花费不少时间。
It is often a burden and time consuming to perform an analysis of variance on the raw data obtained from product experiments.
重点抽样技术是一种方差减少技术，它能显著地减少运算时间。
So Importance Sampling simulation is used to reduce the time of simulation.
实验结果表明，该算法的运算时间是改进的等均值等方差最近邻域搜索(IEENNS)算法的80%左右。
The experimental results show that the computing time for the new algorithm is 80% that of the improved equal-average equal-variance nearest-neighbor search (IEENNS) algorithm.
采用正交设计和方差分析的方法研究了热压烧结温度、压力、时间对该砂轮性能的影响。
The effect of hot pressing sintering temperature, pressure and time on its properties are investigated by means of orthogonality rejection and variance analysis.
为解决目标跟踪精度与观测时间间隔的矛盾，提出了一种基于目标状态估计协方差控制的观测时间确定算法。
To solve the contradiction between target tracking accuracy and observation interval, an algorithm of calculating observation time based on target estimate covariance control was presented.
应用方差分析和时间序列模型建立了一套新的燃气轮机性能监测方法。
A new set of gas turbine performance monitoring methods has been established by using variance analysis and time sequence models.
自动三色会聚在得到方差函数作为清晰度评价函数后，提出了减少清晰度评价调节时间的具体方法。
After getting the variance method to evaluate the quality of the focusing, some special methods to reduce the focusing evaluation time are proposed.
提出了一种新的概率函数计算方法，用于研究金融时间序列在方差波动方面的多重分形特征。
A new probabilistic function for studying the multi-fractal features on the volatility of variance of financial time series is proposed.
在应用协方差分析充分均衡了两组的血铅水平后，ALAD1- 2的选择反应时间与ALAD1- 1组十分接近。
When the blood lead level was adjusted by covariance analysis, reactive time in choice reaction test of the ALAD1-2 genotype was closed to that of ALAD1-1 homozygote.
在第一种模型中，假定出行者的广义出行费用定义为平均行程时间和行程时间均方差的线性加权和，同时出行者能够正确认识自己的广义出行费用。
In the first model users' generalized travel cost are assumed to be weighted sum of the standard deviation and the mean travel time, and users have perfect knowledge of the road network condition.
广义自回归条件异方差(GARCH)模型具有描述时间序列波动性的能力。
The generalized autoregressive conditional heteroscedasticity (GARCH) model has the ability to describe the volatility of time series.
基于转换测量误差协方差矩阵的特征值分解，给出了转换位置测量的时间渐近特性。
Based on the eigenvalue decomposition of the converted measurement error covariance matrix, asymptotic behavior was given about the converted position measurement error.
采用线性插值及双线性插值得到预测点位置上的本征模态值。 结构由原风压场协方差分析得到的主坐标和上述新本征模态值获得未布置测压点位置的风压时间序列。
The linear interpolation and bilinear interpolation were employed to obtain the values of the proper modes on locations where the wind pressure time series are to be predicted.
采用线性插值及双线性插值得到预测点位置上的本征模态值。 结构由原风压场协方差分析得到的主坐标和上述新本征模态值获得未布置测压点位置的风压时间序列。
The linear interpolation and bilinear interpolation were employed to obtain the values of the proper modes on locations where the wind pressure time series are to be predicted.
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