通过误差矩阵和模具的工作特性函数反求输入控制量是加工高精度的自由曲面光学镜所面临的难题。
It is a difficult problem to solve the inputted data when the matrix of error data and the working characteristics of the tool are known in precision machining.
对称的特性也可用来节省矩阵求逆中或求解方程中所需要的一部分计算量。
The property of symmetry can also be used to save a part of the computational effort required for matrix inversion or for a solution of equations.
由于幂指函数形式的独特性，使得幂指函数的极限显得复杂。文中给出了求几种类型幂指函数极限的简捷方法。
Due to its unique characteristics, the calculation of the exponential function limit seems complicated. This paper discussed several simple ways to calculate the exponential function limit.
为求保有市场竞争力，企业所必须具备的特性是？
What features must a company have to be competitive in the market?
由于坐标参数模型的高阶特性，使得在通过对坐标数据微分求速度参数时，产生较大的微分截断误差。
Because of the high step of coordinate model, it will be bring a biggish truncation errors when differential the coordinate data to obtain the velocity parameters.
动态测量可以归结为已知测量系统的输出和测量系统的动态响应特性，求测量系统的输入。
Dynamic measurements can be summed up as ascertaining the input signal with known output signal and known dynamic response of the measuring system.
在跟踪求交的算法中充分利用了交线的几何特性，按等弓高误差快速精确地求取曲面上的交线。
The algorithm makes full use of geometric information of intersecting lines to speed up the calculation according to the arc height tolerance.
采用一种特征值反求形式的方法用来近似层状复合板的波动特性修改。
To obtain desired wave characteristics of composite laminate, the varying rate of eigenvalue with respect to the thickness change is approximated by the second order Taylor expansion.
采用子空间迭代法求它的特征解。Y—2直升机的玻璃钢桨叶进行动力特性分析。
Dynamic characteristics of composite rotor blades of Y-2 type helicopter are studied.
给出了求各路分配节和变阻节特性阻抗以及隔离电阻的计算公式，其中含有一个可供灵活选择的任意常系数。
The equations used to find the values of the wave impedances of the dividing sections and the impedance-transforming sections as well as the isolating resistances are given.
并在此基础上进行了流量特性、能头特性、损失特性的反求。
The flow characteristics, energy characteristics, losing characteristics are calculated based on the…
并在此基础上进行了流量特性、能头特性、损失特性的反求。
The flow characteristics, energy characteristics, losing characteristics are calculated based on the…
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