The error is related to the two rank partial derivative of the flux function to each factor and the mean variance distribution of each factor on each grid point . the statistical - dynamical parameterization scheme involves the both conditions , therefore , it is more practical for the east china moist region than the mosaic method 另而自乞计一动刀宁肠则院含考虑了要紊的二阶偏导数及其在网格元上的分布的均方差，因而该方案比马赛克法考虑更为周全(至少在东部涅润区如此) 。
The calibration of flow model is acceptable with average rms of 0 . 7m , residual mean of - 0 . 045 m , average absolute mean error of 0 . 1 m and normalized rms value of 2 . 3 % . the contour map of the simulated heads , elaborated acceptable model calibration compared to observed heads map 模型结果中，均方差为0 . 7m ，平均误差为- 0 . 045m ，平均绝对误差为0 . 1m ，标准均方差为2 . 3 ，模拟地下水流场与实际观测地下水流场基本一致，说明所建立的数值模型符合该地区的实际水文地质条件。
Several evaluation criteria of information entropy , across entropy , psnr , average square difference and definition are presented in this dissertation . using these evaluation criteria , we study that different fusion rules influence the image fusion performance . these evaluation criteria are also applied to compare the performance of various image fusion methods 定量的评价图像融合性能是一项重要而复杂的工作，建立了信息熵、交叉熵、峰值信噪比、均方差以及清晰度这几种评价方法和准则，利用这些评价准则，研究不同的融合规则对融合性能的影响，还利用这些评价规则对多种图像融合方法的性能进行了比较研究。
Simulation results show that the efficient three - step search performs well than new three - step search for different search range and motion and requires less computation by up to 15 % on average . this paper mainly study how to complete the hardware architecture design and simulation for efficient three - step search 模拟实验证明该算法在不同的搜索范围以及运动大小的情况下,在均方差方面都优于新三步法,具有较强的适应性,且该算法相对新三步法平均计算量减少了15 % 。
( 1 ) ptfs have been developed by using multivariate step wise regression analysis , nonlinear analysis and principle factor analysis . ( 2 ) back - propagation neural network ( bp ) was used in simulation and prediction of ptfs . we use theory of difference to evaluate ptfs developed whether regression method or bp model 不论是采用统计回归模拟模型，还是采用bp神经网络技术所建立的土壤传递函数( ptfs ) ，我们均用误差分析理论分析评价了两函数模型的有效性、适用性和精度，其精度通过均方差来衡量。
The retrieval result shows that the collectivity direction of the two styles wind field is basically consistent , it ' s average away dispatch , average square dispatch and relative away dispatch are all small ; the distribution of the downwards draft and the upwards draft of the two styles wind field is very near , it basically reflects the construe of three - dimensional wind field 反演结果表明：反演得到的风场和模拟的风场总体趋势基本一致，其平均离差、均方差、平均相对离差均较小；两者的上升气流和下沉气流的分布也很接近；基本上可以反映三维风场的状况。
In the condition the tracks correlation is that correlation of system tracks fusion by radar tracks and radar tracks . the tracks correlation is difference between single - sensor conditions and multi - sensor condition . we propose a practical algorithm for tracks correlation in multi - sensor multi - target condition 在多雷达数据处理中，并不是每一部单雷达的航迹跟踪都是用kalman滤波完成，在这种情况下不能用kaiman滤波估计误差的均方差来计算航迹质量因子，我们给出了一种航迹质量因子的计算方法。
Based on the principle of the cooperation , i . e , the correlative stochastic equations are located on the same probability level , the linear regression with fuzzy weight analysis is adopted to fit the test data , and the three - parameter stress - life curves of the mean and the mean square deviation are obtained 根据协同原理，即相关联的随机方程动态地处于同一概率水准，采用模糊随机加权线性回归方法对试验数据进行拟合，得到了三参数的应力-寿命模型均值和均方差曲线，从而求得在给定应力下各可靠度的疲劳寿命。
For the parameter of four kinds of distribution into the question of nonlinear programming , and proves the condition that the c . i . about parameters of the four distributions should satisfy and gives the shortest c . i . about cr2 under the confidence level 0 . 90 , 0 . 95 , 0 . 99 又给出了这四种分布的参数在置信水平为0 . 90 ， 0 . 95 ， 0 . 99下的最短置信区间，最后给出了两正态总体的方差比_ 1 ~ 2 / _ 2 ~ 2 、均方差比_ 1 / _ 2 ，及分布的尺度参数，在给定置信水平1 -下最短置信区间所应满足的条件。
During the course of the research , the criterions of the interpolation effect are mean error ( me ) , mean absolute error ( mae ) , root mean squared interpolation error ( rmse ) and the difference of mean square deviation between the measured and the estimated surface air temperature . the conclusions are as follows : ( 1 ) by contrasting the gaussian weighted model associated with the error modification with the gaussian weighted model , the error modification is proved to considerably ameliorate the precision of spatial interpolation ; ( 2 ) on the base of the gaussian weighted model , taking altitudinal effect into account can reflect the trend in which temperature changes according to the topographic altitude and may ameliorate the precision of spatial interpolation correspondingly and apparently , which indicates that topographical effect on the preciseness of spatial interpolation can not be disregarded in terms of the region with complicated topography ; ( 3 ) the map of daily surface air temperature distribution , using the modified gaussian weighted model a and b , can accurately reflect the temperature - changing - with - topographical - altitude trend . among them , the better is the model a , whose me is below 0 . 03 ? 在此过程中，采用平均误差( me ) ，平均绝对误差( mae ) ，插值平均误差平方的平方根( rootmeansquaredinterpolationerror ，简称rmsie ) ，插值前后测站要素值的均方差( meansquaredeviation ,简称msd )差值作为判定插值效果的标准，得出如下结论：通过高斯权重法与结合逐步订正的高斯权重法的对比，说明结合逐步订正方案的高斯权重法可大大提高地面日气温的插值精度；在高斯权重法中加入海拔影响项可以反映出温度随地形高度的变化趋势，同时也能较大地提高地面日气温的空间插值精度，说明在地形复杂的区域，地形影响在插值精度中是不可忽略的；对于高斯权重法的两种改进方案得到的地面日气温分布图都能很好地反映出表面大气气温随地形高度的变化趋势。
