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Since a large particle size can easily cause division deviation, material over 10mm is not suitable for coning and quartering method. In this instance a riffle divider should be used.

由于大颗粒样品堆成圆锥时容易产生偏析，造成缩分偏差，样品粒度大于10mm不宜使用圆锥四分法，最好使用二分器。

The root mean square error for regressed rainfall is around 65﹪ of the standard deviation and about 15﹪ of the mean rainfall.

回归的平方根误差是其标准差的60％和平均雨量的15％。

Experimental results show that it outperforms the discrete wavelet transform approach with 33% to 36% reduction in root mean square error, 0.9% to 53% improvement in standard deviation of gray level, 39% to 42% enhancement in mutual information, and 0.3% to 38% improvement in space frequency.

实验结果表明，与小波变换融合方法相比，均方根误差减小了33%~36%，灰度标准差提高了0.9%~53%，互信息提高了39%~42%，空间频率提高了0.3%~38%，客观评价准则与目视效果吻合良好。

Monte Carlo and self-adaptive multi-objective genetic algorithm were applied to solve the multi-objective robust optimization of suspension parameters, taking the statistic mean and standard deviation of root-mean-square value of the vertical acceleration of vehicle body and the dynamic load of front and rear tires as objective functions.

以某载货汽车的四自由度悬架模型为研究对象，同时考虑制造精度的影响，以车身垂直加速度、前后轮胎动载荷的均方根值的统计均值和方差为目标函数，采用蒙特卡罗抽样法和自适应多目标遗传算法对悬架参数进行稳健优化。

For ensuring the safe operation of ropeway ,the deviation value of passenger transport ropeway must be measured.

为了保证客运索道的安全运行，需要对客运索道导向轮偏移量进行测量。

This invention concerns a current control process for a feed-in voltage converter, wherein a detected flux-inducing current component and a detected torque-inducing currrent component of an actual currrent vector of a rotating field machine are each controlled for a flux-inducing current component set value and a torque-inducing current component set value of the rotating field machine. To that effect, a control set-value (DELTA u*sp, DELTA u*sq) is determined, dependent each time upon a determined current component control deviation. From these, current components of an actual current vector are formed each time by overlay of a formed pilot value (u*spvor, u*sqvor). This invention also concerns a device for carrying out this process.

本发明涉及一种用于馈入电压式变流器的电流调节方法，其中分别将所检测的一感应式电机的一实际电流向量（i s 的磁通感应电流分量和一转矩感应电流分量i sq ）调节至该感应式电机的一额定电流向量的一磁通感应分量额定值和一转矩感应电流分量额定值，在这种情况下，分别根据所检测的一电流分量调节偏差计算出一调节器调节量（△u * sp ，△u * sq ），由这两个调节器调节量分别通过叠加所形成的一预控制量（u * spvor ，u * sqvor ）形成一额定电压向量的电压分量（u * sp ，u * sq ），本发明还涉及一种用于实施该方法的装置。

The deviation of geomagnetic and rotation axes of the earth is considered in the calculation. Except the dynamo effect induced by the neutral wind, the driving electric field across the polar cap and the region 2 fieldaligned current, caused by the magnetospheric coupling, are also taken into account.

计算中考虑了地磁和地理坐标间的偏离；除中性风场感生的发电机效应外，还包含了磁层耦合(极盖区边界的晨昏电场和二区场向电流)的驱动外源。

The procedure involves the generation of a second independent sample and a test that the estimates of the sample mean and standard deviation determined in the first sample are reliable estimates of the population mean and standard deviatio~.

涉及的程序产生的第二个独立的采样和测试的估计数的样本均值和标准差确定的第一个范例是可靠的估计的人口平均和标准偏差。

Please note that our sample size was rather small, therefore the standard deviation could be quite large.

请注意我们的样本大小相当小，因此标准偏差能是相当大的。

Further, considered the considerable uncertainty of current sample variance, a reliability estimation method based on t-distribution theory and empirical logarithmic standard deviation is proposed.

进一步考虑到工程实际中当次可靠性试验的样本方差具有较大不确定性的因素，提出了基于对数标准差经验值的t分布可靠性评估方法。

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。