1. Introduced the physical power system
analog and digital simulation of the notes, pretty good.
介绍电力系统物理模拟与数字仿真的讲义，相当不错的。
2. Electronic flaws, called noise, that invade an
analog signal are sometimes nearly impossible to differentiate from the signal itself.
电子的缺点，也就是干扰模拟信号的杂音，有时几乎不可能同信号本身加以区分。
3. The paper discusses double CPU full digital control system, instead of
analog control system, and how the full digital control system pulse connects to power cubicle.
文章论述了采用双CPU全数字控制系统取代模拟控制系统，及全数字系统与原有大功率柜间的脉冲连接。
