查询词典 average deviation

The average recovery was 99.21%,and the relative sandard deviation was 2.83%.Conclusion:It is a rapid,simple,accurate and sensitive method.It is also an effective method for rapid detection whether there is tramadol in urine of druggy.

本实验研究建立了尿中曲马多及其代谢物的快速、简便、准确、灵敏的检测方法，可作为快速检测吸毒人员尿中是否含有曲马多的一种有效的方法。

Methods:a solid-phase extraction and gas chromatography-mass spectrometry procedure for the simultaneous detection of tramadol and its main metabolite in urine has been developed.results:the linearity of the tramadol solution from 0.1 g/ml to 100 μg/ml is fine ,and correlation coefficient is 0.9957.the average recovery was 99.21%,and the relative sandard deviation was 2.83%.conclusion:it is a rapid,simple,accurate and sensitive method.it is also an effective method for rapid detection whether there is tramadol in urine of druggy.

采用c18固相萃取法对尿中曲马多原体及其主要代谢物进行提取，利用gc-ms对其进行检测。结果：线性范围为0.1~100μg/ml（r=0.9957，n=6），平均回收率为99.21%，相对标准偏差为2.83%，最低测量限为 0.1 g/ml 。结论：本实验研究建立了尿中曲马多及其代谢物的快速、简便、准确、灵敏的检测方法，可作为快速检测吸毒人员尿中是否含有曲马多的一种有效的方法。

The deformation damage object is defined as the max damage of all elements in net forging and the deformation uniformity object is defined as mean square deviation of the equivalent-strain in each element and the average equivalent-strain of all elements.

用锻件所有单元的最大损伤值作为衡量锻件变形损伤的指标，用锻件所有单元体的等效应变与整个终锻件的平均等效应变的均方差，作为锻件变形均匀性的指标，构造了多目标优化问题的评价函数。

This article selects 2473 experimental data of coal gange light aggregate concrete cubic strength on the spot in Fuxin, calculates their average value, mean—square deviation and coefficient of variation, and makes regression analysis.

本文收集了阜新市煤矸石轻骨料混凝土立方强度的现场试验数据2473个，统计了它们的平均值、均方差和变异系数，并进行了回归分析。

The modified method can satisfy the limit of mean square deviation within 10W/m^2, and the average relative error is about 25%.

计算结果与西沙实测资料、长年代的GSSTF2资料和NCEP/NCAR再分析资料进行比较验证，证明改进后的方法精度较高，基本可以保证湍流热通量的平均标准偏差在10W/平方公尺左右，与多年的月平均做比较，相对偏差为25%左右；同时，不仅首次将计算热通量的空间尺度精确到0.1°×0.1°，而且基本模拟出了南海季风暴发期间热通量变化的主要特点以及中国近海热通量随季节、纬度和海岸地形的变化特征。

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。

The usual examples of aggregated data are average, median and mode while the more complicated are standard deviation and Poisson distribution.

通常的例子，汇总数据的平均数，中位数和模式，而更复杂的标准偏差和泊松分布。

In the image processing , the noise filter principal of the digital logical circuit is used to enhance the image background characteristics . And the average of grey-leveland standard deviation are also adopt to increase the contrast of image , such that the identification rate is improved .

在影像波方面，系以位辑电之杂讯过原增强影像中的背景特徵，并辅以灰平均值与标准差之运算法则增强影像中印字与背景特徵的对比，避免在后续的影像处过程中，将背景特徵归为印字特徵。

A standard expected value model for multi-objective multi-stage transmission planning is presented to realize the transmission optimal planning with the control of line overloading risks. In this model, a constraint of overloading risks is built with expected value and standard deviation of random line active power and two objectives are given as expected value of the average power loss and discount value of the investment cost. By modeling uncertain informations with probability theory, the probabilistic DC power flow is adopted for the correlated calculations among random variables in the planning model.4 A novel multi-objective transmission planning approach that considers transmission investment profit is proposed. Requests for transmission investment profit and social welfare are involved in the proposed planning approach.

以方案总投资费用贴现值和平均网损期望值为目标函数，建立多目标多阶段输电网规划的期望值模型，以线路有功潮流过负荷随机变量的期望值和标准差构建过负荷风险约束，考虑了风险发生概率和严重程度两方面的特征，通过对不确定性信息的概率建模，利用概率直流潮流进行各随机变量的相关计算，实现了控制过负荷风险条件下的输电网优化规划。4提出考虑输电投资收益的多目标输电网规划方法，综合考虑市场参与者对输电投资收益和社会总福利的要求加热管及其对输电网规划的影响。

Results: The average recovery and the relative standard deviation of sodium benzoate and caffeine obtained by PCR were 99.7%,1.06% and 99.2%,0.94 % respectively .

结果：主成分回归法测得苯甲酸钠与咖啡因的平均回收率和相对标准偏差分别为99.7%，1.06%与99.2%，0.94 %，与药典方法比较，两者所测结果差异无显著性。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。