查询词典 variance

We don't know what the error variance, s2, is, because we don't observe the errors, ui

我们不知道误差方差 s2 是多少，因为我们不能观察到误差 ui

It is usual to estimate the error variance in the existing method of second order character.

现行的二阶特征算法通常是对方差的估计，算法存在共同的局限性，即假定样本中不含有显著误差，并且服从正态分布。

And the variance of background error covariance obtained by NMC-method is tuned with the IV-method results.

将NMC方法统计的结果，结合已有的Ⅳ方法的结果对误差协方差的方差部分进行了调整。

The methods do not necessary to assume the components time-to-failure distribution. Thus, error of reliability and variance decreases.

该方法不需假设系统或单元产品的寿命服从某一分布，减少了因寿命分布选择不当所造成的可靠性和方差的误差。

Robust filtering for the delta operator formulated linear uncertain discrete time systems with error variance constraints is considered.

研究基于Delta算子描述的线性不确定离散时间系统在稳态估计误差方差约束下的鲁棒滤波问题。

The usual choice of weights is the inverse of pure error variance in the response.

在"权重"栏中，输入包含权重的列，权重必须大于或等于0，在每个对话框中单击"确定"

The empirical wavelet coefficients of the error variance in the model are given and shown to be asympototically i.i.d. normal.

首先给出了回归模型的条件方差函数的经验小波系数，然后证明了它们是渐近独立和正态的。

By comparison of the standard variance of predictive error, we can find that fuzzy T-S model is more precise than conventional ARX model.

从预测误差方差的分析对比结果来看，该模型预测比传统的ARX线性模型预测要准确。

Index funds ; risk ; tracking error variance ; stress test

指数基金；风险；跟踪误差方差；压力测试

The expressions of polynomial and neural network are used to approximate angular error, it is demonstrated that the variance error by using neural network is smaller, which raises a higher request on the performance of the computer.

本文研究了误差模型的存贮方式问题，对于误差拟合采用了多项式法和神经网络方法，神经网络法的逼近程度高，但对计算机的性能要求也高。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。