英文：tolerance 释文：又称容许误差。在一定测量条件下规定的测量误差绝对值的限值。由于正态分布的随机变量相对于其均值的偏差大于2～3倍标准偏差σs(可用其估值中误差代替)的概率仅有4.55%～0.27%，通常以测量值中误差的规定值或预期值的2～3倍作为其限差，以此判定有无粗差存在和检核测量成果的质量并决定取舍。
有限差分法 [数] finite difference method ; FDM ; finite difference approximation ; [数] method of finite difference
时域有限差分 FDTD ; finite difference time domain method ; Finite Difference Time Domain ; Finite-different time-domain
时域有限差分法 FDTD ; Finite Difference Time Domain ; finite-difference time-domain method
有限差分 Finite differentces ; finite-difference ; finite difference method
时域有限差分方法 FDTD ; Finite Difference Time Domain ; finite difference time domain method
有限差分格式 [数] finite difference scheme ; finite differencing schemes
有限差分逼近 [数] finite difference approximation
有限差分时域 FDTD ; finite difference time-domain
依照规范及限差控制标准，讨论了控制点布设、线布设的精度计算以及作业方法。
According to criteria and tolerance control standard, discussed control point and traverse layout accuracy calculating, as well as operating methods.
还通过实例分析讨论了限差取值问题，提出了更切合实际的环闭合差检核限差的取值建议。
And through case study discussion, the limit value suggestion which is closer to reality for loop closure is also given.
本文计算、分析、确定了限压式变量系和差压式变量泵输出功率最大值和节能效率最大值的压力点；
This paper calculates, analyses and determines the pressure point of maximum of ouput power and saving-energy efficiency of differential pressure and Limited pressure variable displacement pump.
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