In most quantum mechanics textbooks, the determination of coupling vectors of multiple angular momentums was usually by looking up tables because of its complex calculation. 摘要量子力学教材中对于多个角动量耦合基矢的确定,由于其计算上复杂,往往通过查表得到。
Digital look-up table method for synthesizing periodic signals is the most popular technique for direct digital frequency synthesis. 数字查表法合成周期信号是一种最常用的直接数字频率合成技术。