误差系数

Multi-focus images are taken as experimental data, mean square error, difference coefficient, correlation coefficient are used to evaluate the results, and comparison with results based on wavelet transform is also carried out .

对多聚焦图像进行了实验，采用均方误差、偏差指数和相关系数对融合结果进行了客观评价，并与基于小波变换的融合进行了比较，实验结果表明该方法除分解2层时与小波性能相当，取其他分解层数时均获得更好的融合效果。

It was found that there's definite product relationship between the iteration times m and the corresponding critical equivalent coefficient error.

特别地，对带有迭代若干次的充分伸展的Marcov映射的混沌加密系统，其迭代次数m与相应的临界等效系数误差间存在明确的倍数关系。

Firstly,the differential equation with parameters is given,at the same time,in order to let the truncation error of differential equation reach O(Δt~2+Δx~4) as high as possible,the method of undetermined coefficent is used to appropriately select the expression of these parameters.Secondly,the stability condition of the scheme derived is given by using the Fourier method of stability analysi...

首先给出了含参变量的差分方程，并用待定系数法适当地选取了这些参数的表示式，以使差分方程的截断误差阶尽可能高地达到了O(Δt2+Δx4)；其次用稳定性分析的Fourier方法给出了所得格式的稳定性条件；然后给出了确定差分格式中参数的两种方法，得到了一个稳定性条件为r/3的分支稳定的高精度显式差分格式；最后给出了数值例子，数值结果表明了本文格式较现有同类格式的优越性和理论分析的正确性。

In order to reduce error of Nu number at large Ra number and thermal diffusivity, we analyze truncation error of corresponding heat-transfer equation and introduce an adjusting parameter in the equilibrium distribution function.

针对一二阶精度模型在Ra数极高或热传导系数极大时，Nu数的计算与经验值相比出现较大偏差，分析LBM对应宏观热传导方程的截断误差后，在平衡分布函数中引进一个调节因子。

In the PFD, both the differentials and non-differential terms in the differential equation are discretized, and the coefficients of the power series are determined by means of eliminating the truncation error of the corresponding modified scheme, then the high accurate difference scheme is obtained.

摄动有限差分方法在微分方程的差分近似中，离散微商项的同时，也离散非微商项，把非微商项摄动展开成网格步长△x的幂级数，并通过提高差分格式相应修正微分方程误差阶的方法求出摄动幂级数系数，从而获得高精度差分格式。

I Under the general linear model with normal error vector and under convex or matrix losses, the necessary and sufficient condition for there to be UMRU estimators of any linear estimable function SXβ of regression coefficients are obtained.

i在误差向量遵从正态分布，在凸损失或矩阵损失下，得到了回归系数的可估线性函数SXβ的UMRU估计存在的充分必要条件。

Furthermore, a content adaptive IMC algorithm in MCTF, composed of two estimation models, is put forth to reduce the ghosting artifacts. One model is based on characteristic of subbands coefficients for low activity region estimation, and the other is to estimate the MV accuracy in high subbands from the energy after ME. Artifacts, caused by inaccuracy ME or update step, can be reduced effectively by the estimation models.

根据小波变换的子带系数特性，建立了图像平坦区域的估算模型；根据运动估计后的高频子带能量，建立了运动估计准确程度的估算模型，从而实现了具有内容自适应特性的MCTF反向运动补偿算法，减小了ghosting伪影，克服了由于运动估计的不准确以及更新步骤可能导致的低频子带反向补偿误差。

It shows that theoretical calculation is almost in agreement with the experimental results. Its relative error is smaller than 18%.

通过对耐火纤维材料导热系数的计算结果和实验测定值的比较，两者基本一致，其相对误差小于 18％。

Several numerical examples for the two-dimensional impenetrable and penetrable obstacles with arbitrary shapes is given to demonstrate that the algorithm yields a reasonable reconstruction of the obstacle even when 10% errors are added to the Fourier coefficient of the far-field pattern.

以具有各种形状的二维不可穿透和可穿透障碍物的重构作为算例，进行了深入的数值研究，结果表明了即使在所用的远场分布的某一个Fourier系数中加入10%的随机误差，也能得到很理想的重构结果。

Also the error of the premise of the magnified method based on the geometric progression of additional deformations is studied. It is recommended that the two methods should be combined together.

文中分析了基于附加变形的等比级数假定的放大系数二阶分析法的误差来源和特点，分析同时表明，两个方法的结合是自然而有效的。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。