查询词典 mean-square error

For the 592 chemicals, the coefficient of determination of the regression model was as high as 0.9696 with a mean absolute error of 0.37 log-unit.

对所有592种化合物而言，模型的可决系数高达0.9696。估算结果的平均绝对误差仅为0.37个对数单位。

According to the ensemble neural network model established in this paper, the estimation result showed that the network had good stability and prediction accuracy and the estimation absolute mean relative error of 207 samples was 8.62%.

估算结果表明，所建立的神经网络集成模型，其网络有良好的稳定性和预测精度，207个样本估算的绝对平均相对误差为8.62%。

Basing on the mechanism of errors in levelling, a rigorous formula is first de- rived for calculating the mean accidental error per kilometer η.

由于σ在目前的一般水准测量作业中还是不能确定的，所以研究j在各种不同情况下略去σ定权，对平差质量所产生的影响。

These algorithms might not only recover carder phase , but also achieve lower residual mean squared error .

该算法不仅能够完成信道均衡，纠正相位旋转，而且可以获得较低的剩余均方误差。

The coefficient of determination and mean residual error of the final model were 0.993 and 0.239 log-unit, respectively.

最终模型的可决系数为0.993，平均误差为0.239个对数单位。

The relationship between the topology and convegence of networks is approached and the reason causing overtraining and overfitting is analysed. Then the redundant weights and nodes in the network are defined by using improved activity function and a new algorithm called the BPNSO for determining the network structure for any application is proposed, which use dual optimization objective function combining the mean squre error of the network output with network complexity penalty function.

文章对网络拓扑结构与网络收敛性和稳定性的关系进行了探讨，分析了网络出现Overtraining或Overfitting的原因和解决的目标，提出了神经网络结构优化的策略，改进了活化函数，定义了冗余权值和冗余节点的概念，为辨识和删除冗余权值和冗余节点，提出采用优化目标函数中增加网络复杂度罚函数的双重优化目标函数，并对罚因子提出了基于学习误差和权值的自适应动态调整公式，论文定义了这种BP网络结构优化方法为BPNSO，并给出了完整的计算流程。

From our experimental results, we find the expanding input features with back propagation learning rule can get fast convergence in training and decrease the mean absolute error between the desired output and the actual output.

实验显示，采用此种扩展型特徵值的倒传递学习法网路可以加速网路的学习效率以及降低实际输出值与期望输出值之间的绝对值误差。

The wide used method in weather, hydrography, etc., Kalman filter, is used to update the coefficients of the empirical model and expected to make better improvement. The test with the ionosound data of hourly values from 1986 to 1995 at Changchun illustrates that the root-mean-squre error of the forecasted values in one hour advance is 0.76 MHz in winter, 0.68 MHz in summer and 0.61 MHz in equinoxes, respectively.

尝试利用气象预报中常用的Kalman滤波方法对模型的系数进行实时修正，以提高预报精度，并对长春站1986-1995年近一个太阳周f0F2数据进行提前一小时预报试验。

We characterize performance by the expected mean squared error in steady state.

我们通过稳态的均方误差确定了该估计量的效果。

It is found that the fitting accuracy is higher and the mean relative error between fitted and standard value is less than 0.3%.

该方法的拟合精度较高，拟合值与辐射模式标准值的平均相对误差在0.3%以下。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。