估计GM(1,1)模型中的参数通常采用最小二乘准则，而在模型精度检验时又常采用平均相对误差。
Estimation of GM (1, 1) model parameter usually adopts the least square criterion, but test of model precision often USES average relative error criterion.
通过对一自由曲面分块测量及数据拼接实验表明，这种方法参数求解简单，空间距离拼接相对误差优于0.56%。
Through an experiment for free-form surface measurement, the approach is proven to be simple for parameter computation and its relative error for space length measurement is better than 0.56%.
给出的例子表明，该模型预测主生产计划时段的参数(计划参数)与实际参数的相对误差不超过3%。
An example indicates that relative errors between forecasting parameters (planning parameters) and practical parameters are all less than 3% by applying ARMABP model.
通过对相关雷达参数的相对误差和回波强度绝对误差曲线分析得出，雷达参数天线增益优于0。
Through the correlation radar parameter relative error and the echo intensity absolute error curve analysis, when the radar parameter antenna gain surpasses 0.
采用响应面法建立了表示比吸能随材料参数而变化的曲面，和高次多项式拟合时的相对误差曲线。
Then the response surface method(RSM) is utilized to establish the response surfaces or curve of SEA vs. material parameters and the curves of relative error in high-order polynomial fitting.
利用逆散射理论，通过测量离体血管的声散射场振幅谱的大小周期，重构了猪的主动脉离体血管的内外半径，重构参数的相对误差<4%。
Inverse scattering theory was applied to reconstruct the inside and outside radii of the aortic blood vessels of a pig by scattering spectrum. The relative errors of reconstruction were less than 4%.
储量、区块及单井累积产油量、含水等参数计算的相对误差均小于2.0%，拟合精度高。
The computed parameters such as reserves, cumulative oil production of single well and area, water cut have small relative error of less than 2%, the matching accuracy degree is high.
优化结果表明，该组冲击参数的平均相对误差为1.3%，各单项误差也均满足小于5%的指标要求。
The optimized results showed that the average relative error of this combination is 1.3%, and the individual error is also able to meet the requirements of less than 5%.
水泵装置在非最优工况下变速运行时，大流量侧装置性能参数按相似律换算误差变小，在小流量侧换算误差增大，最大相对误差达3.043%。
When the pump runs off the peak efficiency, the error of conversion method decreases in the large flow-rate region, while increases in the small flow-rate region, with a maximum error of 3.043%.
水泵装置在非最优工况下变速运行时，大流量侧装置性能参数按相似律换算误差变小，在小流量侧换算误差增大，最大相对误差达3.043%。
When the pump runs off the peak efficiency, the error of conversion method decreases in the large flow-rate region, while increases in the small flow-rate region, with a maximum error of 3.043%.
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