查询词典 mean error

The negative binomial distribution, gamma distribution, and log-normal distribution were chosen as error distributions according to log-linear regression of variance versus log-mean of CPUE.

根据鲐鱼单位捕捞努力量渔获量数据呈正偏，以及CPUE均值与方差在对数尺度下的线性关系，选择了负二项分布、伽马分布与对数正态分布作为误差分布。

The simulation results indicate that comparing with the classical Wiener filter, this method performs better in visual effect, mean square error and peak noise-signal ratio, and is an effective method for image restoration.

仿真实验表明，从视觉效果、均方误差和峰值信噪比等方面进行比较，其恢复效果比经典的维纳滤波法好，是一种有效的方法。

In the research of dynamic difference, based on the factors analysis of house price level, constructing similar and normal error correction model, the paper studied the determinant of short-run dynamics, and analyzed the reason of difference in autocorrelation and mean reversion.

在住房价格短期波动差异研究中，在城市房价水平影响因素分析的基础上，通过构建类似和标准误差修正模型，考察房价短期波动的决定因素，分析了房价波动自相关和均值回复表现差异的原因。

The results indicate that different approaches and product strategies have little effect on the estimates, but the partially constrained approach and the unconstrained approach (except for the one-pair strategy) produce fewer fully proper solutions, more bias and greater root mean square error for smaller sample sizes or poor reliability of the indicators.

结果显示，四种方法与交乘项策略对估计影响不大，但部分限制式方法於三种配对组合、未限制式方法於两两配对与所有配对组合，在适当解比率与参数估计评估表现皆较其他组合差，以小样本或外生潜在变项负载量低时尤为明显。

Of endogenous variables with the Root-Mean-Square Percent Error between simulated values and actual values less than 5%, and 81. 8% of endogenous variables with RMSPE less than 10%, which implies that the overall goodness of the model is satisfactory.

检验结果表明，动态模拟值与实际观测值的均方根相对误差低于5%的内生变量占全部内生变量的59.1%，而均方根相对误差不超过10%的内生变量占81.8%，说明模型对观测值具有良好的总体拟合性能。

By means of PSO and taking the minimum mean absolute percentage error of the forecasting model as objective function, the optimal model parameters are chosen.

通过粒子群优化算法，以模型预测平均绝对百分误差最小为目标，选择最优的模型参数。

Results: The mean concentration and standard error of Fe. Ca, Zn, Cu. Mg and Pb in the blood of all subjects were 8.30±0.79μmol/L, 1.59±0.14 mmol/L, 70.68±9.45μmol/L, 15.56±3.42μmol/L. 1.68±0.14 mmol/L and 0.354±0.130μmol/L, respectively. Amount of children occurred the deficency of Ca, Zn and Fe and plumbism.

结果：以平均值±1倍标准差的形式来表示所有儿童全血微量和铅的测定结果如下(平均值x±s：Fe，(8.30±0.79)μmol/L；Ca，(1.59±0.14)mmol/L；Zn，(70.68±9.45)μmol/L；Cu，（15.56±3.42μmol/L；Mg，(1.68±0.14)mmol/L；Pb，(0.354±0.130)μmol/L。

Sset future prices can be forecasted with filtering historical simulation by drawing from standardized residual density. The problem of inappropriate risk neutral assumption could be resolved by the calibration from density transformation. The transformation is to identify the state price density per unit probability through the parameter re-estimation by minimizing the mean squared error of market and model prices.

bstract：使用残差机率分配抽样的过滤历史模拟法可以作为未来资产价格的预测，而风险中立假设不适当的问题则可透过风险测度的转换予以解决，该转换过程系将市场价格与模型价格的均方差极小化求得估计校正后的新参数，作为状态价格机率分配的转换机制。

Considering the fat-tail phenomenon that may exist in practical data, we have also studied the PTLE for the multi-t distribution model based on the three large sample tests above. Performances of the estimators according to the quadratic bias and mean square error are similarly compared in detail.

考虑到实际数据可能存在的厚尾情况，本文研究了文献中讨论颇多的多元t分布模型的基于大样本检验的等式约束预检验Liu估计，并同样在平方偏差和均方误差两个准则下对其优良性进行了详细比较。

Usually, lest mean square error algorithm, Quadric exponential smoothing and so on are used m such predictions.

正确有效地预测服务器性能负载，是计算机系统性能管理系统的一个重要环节。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。