查询词典 mean square

The angular distribution of the scattering coefficient of the HH polarization is obtained by numerical implementation, the influence of the fractal dimension, the special fundamental frequency, the scale interval, the permittivity of substrate medium, the permittivity and the mean layer thickness of intermediate medium, the root mean square of rough surface, and the frequency of the incident wave on the bistaticscattering coefficient is discussed.

通过数值计算得到了HH极化下双站散射系数随散射角的变化曲线，讨论了分维、空间基频、标度区间、底层介质介电常数、中间介质介电常数和厚度、粗糙面高度起伏均方根及入射波频率对双站散射系数的影响，得到了平面波入射一维带限Weierstrass分形分层介质粗糙面散射系数的分形特征、基本特征、分区特征和随频率变化的特征。

The correlative coefficients R could be 0.8867, with the Mean Absolute Error and the Mean Square Error being 15.07 and 377.4 respectively for the training set, while the predicting precision were 3.5% and 16.5% for the corroborant set.

同时，该网络能解决富营养化多影响因素之间的不确定性和非线性，模型的预测精度较高，对合理制定和实施西湖水质治理具有较高的实用价值。

The simulation results demonstrate that the proposed algorithm can effectively reduce the location estimation error and variance of the MS, and has favorable performance in both root mean square error and mean error cumulative distribution function.

仿真结果表明，该算法能有效降低移动台位置估计的误差和方差，具有良好的均方根误差和均值误差CDF性能。

For Panel data model, this thesis studies the comparisons about two stage esti-mator, least square estimator, Within estimator and Between es-timator of regression parameter under generalized mean square error criterion and Pitman criterion.

在广义谱分解估计的基础上，应用目前备受关注的广义p值方法给出了混合模型方差分量的精确检验，通过模拟研究表明此检验方法能够很好的兼顾控制犯第一类错误的概率和功效。

Considering the randomness of the structural physical parameters and utilizing the random variable's functional moment method and the algebra synthesis method, the mean value and the variance of the mean square value of the structural displacement response under stationary random excitation are computed firstly from the expressions of structural stationary response in frequency domain. And then the expressions of the mean value and the variance of stochastic rigid frames dynamic reliability are educed from the Poisson formula of calculating dynamic reliability.

考虑结构的物理参数具有随机性，从结构随机响应的频域表达式出发，利用求解随机变量数字特征的代数综合法和矩法，导出随机参数刚架结构在平稳随机激励下的位移及速度响应均方值的数字特征，再由动力可靠性的Poisson公式导出结构动力可靠度的计算公式。

The superiority of a class of linear estimator with respect to generalized least square(GLS estimator of regression coefficients was studied in terms of the mean square error matrix(MSEM criterion, and the lower bound and super bound of three relative efficiencies were obtained respectively.

在均方误差矩阵准则下研究了回归系数的一类线性估计相对于广义最小二乘估计的优良性问题，并讨论了三种不同相对效率的上、下界。

We use residual mean square instead of residual sum of square.

结果分段线性函数是比阶梯函数更广的函数类。

An FCC term for "the square root of the ratio of the root- mean-square free space field intensity produced at one mile in a horizontal plane in micro- volts per meter for one kilowatt antenna input power 137.6 mV/m."

FCC术语，"水平面1英里处产生的自由空间场强的均方根比值的平方根，表示为微伏每米。输入功率为1千瓦的天线功率增益为137.6 mV/m。"

According to this research, the root mean square error could achieve ±1.156cm,±1.253cm and ±1.376cm by adopting hyperbolic mode, three times of the distance mode and distance square model. Its precision is good enough for engineering measurement. It provides not only the quicker methods to measure the orthometric height on survey engineer, but also a academic reference on regional geoid model

实验结果发现，经数学模式改正后双曲线模式、距离三次方模式及距离平方模式分别能达到±1.156cm、±1.253cm及±1.376cm合乎工程测量规范之标准，本研究在工程上不仅提供实务上快速测得正高的方法，於学术上亦可提供区域性大地起伏模型相关研究之参考。

Among them, weighted least square combination , minimum mean square error combination and auxiliary vector combination are very effective methods.

其中包括加权最小二乘合成、最小均方误差合成和辅助矢量合成等多种合成检测方法，性能仿真结果证明了这些检测方法的有效性。

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。