first order perturbation [测] 一阶摄动
first order perturbation theory 一阶微扰理论
a first-order perturbation 一阶扰动
the first order perturbation 一阶摄动
First order perturbation bound 一阶扰动界
Relativistic and mass-polarization effects are included as the first-order perturbation.
相对论修正和质量极化效应用微扰论计算；
Compared with first-order perturbation, second-order perturbation stochastic finite element has the advantage of higher accuracy.
与一阶摄动随机有限元相比，二阶摄动随机有限元具有较高的计算精度。
This paper points out that the first-order perturbation photon flux produced by this system has not observed effect when GWs is different from frequency of Gaussian beam.
笔者指出，当入射引力波和高斯束不同频率时，高斯束谐振系统产生的一阶扰动光子流没有观测效应。
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