本文介绍一种多功能数字式磁通计，采用电子积分器将被测信号对时间积分，经过Ａ／Ｄ转换成数字量被单片机读取、存储、处理并显示有关结果。......

阐明了用信号流图和开关电容通用积分器设计开关电容低通滤波器的方法，本设计方法简明直观，物理概念清楚，便于掌握，容易推广到其它类型......

N-body simulations of the Sun, the planets, and small celestial bodies are frequently used to model the evolution of the......

The continuous approximations play a vital role in N-body simulations. We constructed three different types, namely, one......