重复误差

In the new method, the dynamic equilibrium equation of non-proportionally damped structure is expressed in the iteration form, based on which the inverse operation of the matrices is avoided.

此外，文中还对比了相关失效模式和基于独立重复试验的结构体系可靠度，分析了基于独立重复试验假定的串联可靠度计算方法的误差。

In the non-regular wave experiment, the average wave height error is less than 4.87%, the average pariod error is less than 4.59%, while the repeated error of the wave height is less than 1.87%and the transverse error of wave height is less than 3.71%.

水槽模拟海浪的检验结果表明，本造波机系统能够准确地模拟波浪，规则波的波高横向误差小于2%，波高重复误差小于1.28%，周期重复误差小于0.2%；不规则波的平均波高误差小于4.87%，平均周期误差小于4.59%，波高重复性误差小于1.87%，波高横向误差小于3.71%。

The system has the features of high precision, good repeatability, high automatic degree and simple operation. The measurement result indicates that the measurement range is from 400nm to 1000nm, the measurement accuracy excels 0.1 percent, the repetitive error is less than 0.6 percent.

创建的测量系统具有测量精度高、重复性好、自动化程度高和操作简单的特点测试结果表明：系统的测量范围为400~l000nm，测量准确度优于0.1%，测量的重复误差小于0.6%。

It is pointed out that the error of indication E0 for the calibrated test length which are measured when the offset length between the ram axis and the stylus tip is zero shall neither exceed the maximum permissible error MPEE0 nor exceed 1/3 of the probe error,that the repeatability of E0 shall neither exceed the maximum permissible error MPE Rnor exceed the repeatability error of the probe,and that if the measuring data is rejected in acceptance and reverification,measurement must be carried at least 5 times at the same position for reducing the possibility of misjudgement.

提出探测轴探针针头零偏置长度的校准测试长度的示值误差E0应不超过最大允许校准测试长度的示值误差MPEE0，且不应超过测头误差的1/3；E0的重复性误差R不应超过最大允许重复性误差MPER，且不应超过测头的重复性误差。建议验收校准测量数据超差剔除后，必须在相应位置重复测量5次以上，以减小误判的可能性。

We introduced all parts of a general repetitive control system after depicting the regulations of the repetitive control theory. The parts include inner model, delay section, compensator, low pass filter and controlled object. And we also analyzed the robust, convergence, following error of the repetitive control system.

阐述了重复控制的基本思想，重点介绍了重复控制系统得各个组成部分，包括重复控制器的内模、周期延时环节、补偿器、低通滤波器和控制对象等，并且分析重复控制系统的稳定性、收敛性和稳态误差等性能特征。

In order to overcome the shortcoming of PI controller in harmonics control, the repetitive control and PI control are combined and used in the closed-loop control of TSMC; The problem of conventional repetitive controller is pointed out and a modified repetitive control method is proposed: To avoid the influence of no-periodical disturbance on the control action of repetitive controller, the error caused by no-periodical disturbance is identified and discarded.

针对PI控制器对谐波控制的不足，将重复控制技术与PI控制相结合，应用于TSMC逆变级的闭环控制中；在此基础上提出了重复控制器的改进方案：对由非周期性扰动引起的误差不进行记忆，以避免其对重复控制器的控制动作产生干扰。

The results from an example showed that the unbiased estimate of error variance could be obtained so that polygenic variance and polygenic heritability could not be underestimated. Moreover, the AIC values by using the average of two replications were less than that by using the observations of a replication.

在试验设计为重复内分组随机区组设计时，通过甘蓝型油菜初花期的遗传分析表明：这种方案的试验误差方差估计值无偏性好，可避免多基因方差和多基因遗传率被低估；重复观测值平均数的分离分析的AIC值低于利用单一重复资料的AIC值。

Through concretely analyzing the magnitude and error of deflection of the vertical, we can get the results that the long-period, smaller-range non-tidal variations are commonly less than the tidal ones, but the short-period, larger-range non-tidal variations are comparable to the tidal ones, especially in some areas they are even bigger than the tidal ones, this state can be measured by repeated gravimetry completely.

通过对垂线偏差量级和误差大小的具体分析，得出结论：一般长周期的、幅度较小的非潮汐变化要小于潮汐变化，但短周期的、幅度较大的非潮汐变化则可能与潮汐变化相当，个别地区甚至还会超过潮汐变化，这种情况完全可以用重复重力测量的方法检测到，这也说明重复测量的方法是可行的。

The evaluation method and algorithm of shape error (roundness, plane straightness, space straightness, cylindricity) were discussed. A new kind of algorithm, namely mesh searching method, which can be used to evaluate the roundness error, plane straightness error, space straightness error and cylindricity error, were put forward. With this algorithm, the shape error can be obtained by transferring the distance formula repeatedly and simple judgment without linearzing the distance formula (from point to point or point to line) and choosing optimal direction and step length.

对形状误差(圆度、平面直线度、空间直线度、圆柱度)的评定方法及算法进行了讨论，提出了一种评价圆度误差、平面直线度误差、空间直线度误差及圆柱度误差的新算法——网格搜索法，该算法不需要对距离公式线性化，也不需要选定优化方向和优化步长，只需重复调用距离公式和简单的判断即可得到符合定义的形状误差。

After studying analysis of variance on single factor and double factor,this paper reveals that if the difference between levels of the primes exist noteworthily is mainly depended on the sum of its experiment effects or variance of experiment effects and stochastic difference.

0引言 在试验设计时设置重复试验，能够估计试验误差；重复试验次数越多试验误差越低，试验精确度越高。一般认为，适宜重复次数应保证使误差项自由度至少为12，否则F检验或t检验的临界值上升很快，难以呈现显著性川。

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。