decreased drastically meaning in Chinese

大大减少了

Unfortunately , as the number of wolves has decreased drastically in the world , garou blood has become dangerously impure
不幸地是，随着野狼数目的急剧下降，狼人的血脉已经在不纯净的边缘。
In this paper , the application of dtc into pmsm is discussed first , and then simulation of pmsm dtc is implemented using matlab software . secondly , for the p roblem of torque ripple at low speed , a new dtc system based on fuzzy logic is proposed and simulation results show that the torque ripple is decreased drastically
本文首先讨论了直接转矩控制方法在永磁同步电机中的应用问题，利用matlab仿真工具对永磁同步电机直接转矩控制系统进行了仿真研究，针对直接转矩控制低速存在较大转矩脉动问题，提出了一种基于模糊控制方法的直接转矩控制系统，仿真结果表明转矩脉动大大减小。