误差的均方

As to seemingly unrelated regression system,a new biased contracting estimator of the parameters is put forward,which is the combination of generalized ridge covariance-improved estimator and Stein estimator,and the good features of this estimator in mean square error is discussed.

对于一类相依回归系统，结合广义岭型协方差改进估计与Ste in估计，提出了一种新的有偏压缩估计，，并讨论了该估计在均方误差下的优良性质

In the mixed linear model with two variance components, two positive estimates of variance component are proposed, which are dominate the ANOVA estimate and the Tatsuya estimate in the sense of mean-squared errors.

对含有两个方差分量的线性混合模型，本文给出了两个正的截尾估计，并指出它们在均方误差意义下优于ANOVA估计和Tatsuya估计。

Thereby, these facts indicate that the SDE not only have better statistic properties but also have uniformly smaller mean square errors than ANOVAE in an available group of linear mixed models. The other significative following work is to generalize the idea of SDE to multivariate linear mixed model and obtain the SDE of variance component matrices which uniformly dominate the ANOVAE either.

对于含有一个随机效应的混合模型，目前文献中都仅讨论了方差分量的谱分解估计和ANOVA估计等价的充要条件，本文首次给出了方差分量的谱分解估计在均方误差意义下严格的优于ANOVA估计的理论结果，并推广到广义谱分解估计，从而说明谱分解估计不仅较ANOVA估计有更好的统计性质，而且在一类常用的模型下有更小的风险损失。

The computer simulation showed the blind Sign-EMS MLSE algorithm is superior to conditional blind EMS MLSE algorithm in convergence speed and mean square error in typical telephone channel, symmetric channel and common channel.

通过计算机仿真试验，在典型电话信道，对称信道以及普通信道中，对该算法与传统的LMS盲最大似然估计算法性能作了比较，并证明了该算法在收敛速度、均方误差等方面均优于传统算法。

It overcames the shortcoming of the discontinuous character in hard-thresholding function and solves the problem of the permanent bias in soft- thresholding function.

仿真实验结果表明，采用新的阈值函数的去噪效果在信噪比增益和最小均方误差意义上均优于传统的软

The Mean Square Error of Neutral Network dropped to 0.001 after 242 training epochs.The maximum relative error of simulated value...

在均方差为0.001的条件下，网络于242次训练后收敛，模型训练的最大相对误差为2.58%，预测值的最大相对误差为10.08%，表明该模型具有良好的预测和仿真能力。

The performance of the proposed method is compared with that of the well-known vector standard filters such as the VMF, progressive switch median filter, scalar median filter ,minimum distance between central sample and scalar median in its neighborhood vector median filter and the basic vector directional filter.

结果表明，DMNVM滤波性能明显优于现有的VMF、递进开关中值滤波、标量中值滤波、与标量中值距离最小向量滤波和方向矢量中值滤波；同近年提出的自适应向量滤波比较，AVMF客观指标平均绝对误差协MAE、均方误差和标准色差分别是DMNVM的1.81、2.59和2.17倍，这说明DMNVM的滤波性能有显著提高。

A large number of commercial data were simulated, and the high performance of the soft-sensor is demonstrated by the fact that the maximum relative error, relative root mean square error and tracking precision are 2.68%, 0.17% and 0.9569, respectively.

针对大量工业数据，进行仿真计算，得到模型的最大相对误差、相对均方误差和跟踪性能指标分别为2.68%、0.17%和0.9569，说明该软测量模型具有良好的预测能力和跟踪性能。

Simulation results show that the blind MMSE equalizer has smaller mean-square error of symbol estimation than the corresponding zero-forcing equalizer.

仿真结果表明，该均衡器比基于线性预测的盲置零均衡器有更小的符号估计均方误差。

Simulation is carried out to compare it with least mean square-based blind equalizer and neural networks-based blind equalizer, and the results show the method has much better performance.

通过仿真实验，并与采用最小均方误差准则的盲均衡器和采用神经网络的盲均衡器进行比较，结果表明该方法的非线性均衡性能最佳。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。