一级修正 meaning in Chinese

first order correction
first-order correction

The main contents are as follows : ( 1 ) by employing the direct method , the soliton periodic amplification system in optical fiber link with loss is considered , and the adiabatic solution ( slowly varying portion ) and first - order correction ( rapidly varying portion ) for a single soliton case are presented
本文的主要内容如下： ( 1 )利用直接扰动方法对周期放大系统进行了理论分析，给出孤子周期放大系统的绝热近似解和一级修正解的积分表达式，结果分析表明孤子在放大过程中一部分能量以色散波的形式流失，而这一色散波主要由孤子周期放大系统的一级修正解来刻画。