perturbation approximation meaning in English

微扰近似

The quadratic programming perturbation approximation method for the linear programming problem
求解线性规划问题的二次规划摄动逼近法
It is necessary to calculate the resolution formula of cross section to fit experiment , but the formula always depends on special physical model . indeed it is difficult to give out an available result using some physical models , for example quantum chromodynamics problem mostly ca n ' t expand using perturbation approximations
拟合实验数据需要给出各种反应过程截面的解析公式，然而截面公式强烈的依赖于物理模型，甚至用有的物理模型很难给出所要的截面公式，比如粒子色动力学理论一般是无法用微扰展开进行简化的。