retroactive是什么意思

网络释义

用法例句

With the state-of-date computer-aided control technology,in which the coordinate transformation and retransformation, the digital calculation and filtering/regenerative compensating calculation are carried out, the compound control-tracking system with regenerative feedback is built up and the high-precision tracking to high-speed moving objects is finally realized.

　为提高伺服系统跟踪精度,利用现代计算机辅助控制技术,用软件进行坐标变换与反变换、数字计算与滤波和再生补偿量的计算,构成具有再生反馈(近似前馈)的复合控制跟踪系统,最终实现对高速运动目标的高精度跟踪。