平均偏差

In order to evaluate the vertical offset, it is essential to know the geopotential of the mean sea level and of the geoid as well.

为了获得这一垂直偏差，很有必要确定当地平均海面和全球大地水准面上的重力位值。

The four different ERH/EMC models including the Henderson, Chung-Pfost, modified Halsey and Oswin equations were respectively used to investigate the fitting agreement of the measured data. Based on the comparison of the residual distributions, the coefficient of determination R2 values, the residual sum of squares SSE values, and the mean relative percentage deviation P values obtained from the regression analysis of six temperatures 20、30、35、40、50 and 60 ℃ tests, the Oswin model with two parameters and the modified Oswin model with three parameters all had the equivalent representative to the prediction of ERH/EMC values for the samples of lemon balm, and was also the best predicting models for the desorption isotherms of lemon balm.

试验时分别以四种平衡含水率模式，即Henderson、Chung-Pfost、修正Halsey与Oswin方程式，经由量测数据适称性之探讨，综合回归分析之残差图及决定系数R2值、残差平方和SSE值与平均相对偏差百分比P值比较后，获致在六个温阶20、30、35、40、50与60 ℃下，Oswin二参数模式与修正Oswin三参数模式皆具有相等的之平衡含水率与平衡相对湿度之适用代表性，可作为香蜂草去湿平衡含水率之最佳预测模式。

In this article, the wave of cutting speed is described as the deviation of mean square and the maximum deviation of speed during the working stroke.

本文用工作行程中速度的平均平方偏差及最大速度差来描述刀具速度波动，并以此为评价函数，采用多目标优化设计方法，确定牛头刨的主传动拉杆尺寸。

The simulation results show the mean relative deviation based on clustering algorithm could improve the quality of clustering.

仿真结果表明，基于平均相对偏差的聚类算法提高了聚类的质量。

Results: The good linear range of method was 10 to 1000μg/ml (T=0.9999) with the correlation coeffivient of 0.9999, and the limit concentration in air was 0.2 mg/m^3 with the average relative standard deviation less than 5%(n=6). The average sampling rate ranged from 96.6 to 100%, and the breakthrough capacity of l00mg activated charcoal was 4.7mg. The average desorption rate was 97.6%, and mesityl oxide absorped in activated charcoal tube was stable for 7 days and can be detected accurately with other gas coexisting in the air of workplace.

结果：异亚丙基丙酮浓度在10~1000μg/ml内呈良好线性关系，相关系数0.9999，最低检出浓度为0.2mg/立方公尺，相对标准偏差＜5%(n=6)；气体采样效率≥96.6%，100mg活性炭对异亚丙基丙酮的穿透容量为4.7mg，平均解吸效率97.6%；活性炭样品室温下可保存7天；丙酮、丁酮、异佛尔酮、苯、甲苯、二甲苯等共存物不干扰测定。

In order to eliminate the prediction deviation caused by small data set,proposed a stream prediction algorithm based on weighted moving average method.

该模型仅存储当前滑动窗口中的数据并对其进行分析，提高了计算效率；同时，为了削减在较小数据集上回归预测所产生的偏差，提出一种基于加权移动平均的数据流预测算法WMA_LRA。

Resultsthe linearity of flavonoids was fine in the range of 0.008～0.040 mg/ml,the average recovery rate was 98.2%,and rsd was 0.55%(n=5).conclusionthe method has laid the foundation for the control of the inherent quality in nigella glandulifera preyn et sint.

结果线性范围为0.008～0.040 mg·ml-1，平均回收率为98.2%，相对标准偏差为0.55%。结论该法为控制维吾尔药黑种草子的内在质量提供了依据。

The bias of cyclic periodogram with ssinc window is analyzed in both spectrum frequency direction and cycle frequency direction, and that the TA cyclic spectrum estimation is unbiased is analyzed. The average method of cyclic periodogram is also derived in terms of STFT.

论文中通过分析加ssinc窗的循环周期图在谱频率方向和循环频率方向的偏差，表明TA循环谱估计是无偏估计，并根据STFT方法，推导了使方差得以减小的平均循环周期图方法。

The optimum conditions for extraction was proved practicable by condition filtration and orthogonal design with supersonic wave method .The results showed that the optimum conditions for extraction to ultrasonic method is : methanol (φ=40,20ml),and 15℃ for 30 min ,this paper has determined nicotine contents that is 23.50mg/g at absorption peak (λ=262nm) by HPLC with an eluent consisting of methanol –potass Phosphate alleciate (pH=3) with the recovery and coefficient of variation are 101.52% and 0.91%.

通过超声波提取方法进行条件筛选和正交化实验，确定了烟草中尼古丁的最佳提取条件，结果表明，超声波最佳条件是：甲醇浓度40%，固液比1：20，提取时间30 分钟，超声温度15℃，用高效液相色谱方法在波长262nm 处测定尼古丁的含量，流动相组成为甲醇：磷酸二氢钾缓冲溶液=10：90，测得烟草中尼古丁的含量为23.50 mg/g，平均回收率为101.52%，相对偏差为0.91%。

Theoretical plates of propyl alcohol is 9.9×10^4 plates/m; resolution of ethanol and propyl alcohol is 4.66; RSD of correction factor of relative mass is 1.67% Good linearity with correlation coefficient 0.999 is observed over the range 45.0%~85.0% of ethanol in solvent. The method recovery for ethanol is 100.4% with RSD 1.69%; he RSD of accuracy is 1.74%.

结果：系统实用性实验测得正丙醇理论塔板数为99000，乙醇与正丙醇分离成4.66，相对质量校正因子的变异系数为1.67%；该方法在乙醇百分含量范围45.0%-85.0%内呈良好的线形关系，相关系数为0.999；平均回收率为100.4%， RSD为1.69%；精密度相对标准偏差为1.74%。

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如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。