8-1 Nodal, mesh and loop analysis Nodal analysis:

We define the ratio of the phasor voltage to the phasor current as impedance

1、复数的代数式:F=a+jbj=√-1 2、复数的矢量表示 3、复数的三角式:

《电路》（英文版）7-6 Phasor relationships for、and R:

sinusoidal current or voltage at a given frequency is characterized by only two parameters an amplitude and a phase angle. The complex representation of the voltage or current is also characterized by these same two parameters

The effective value of any periodic current is equal to the value of the direct current which flowing through a resistance R, delivers the same power to r as periodic current does

In either case, leading or lagging, we say that sinusoids are out of phase () if phase angles equal they are said to be in phase(同相)

1. 振荡条件 2. 起振和稳幅 3. 振荡电路基本组成部分

6.5 汽车空调系统的维修 6.6 汽车空调系统的故障诊断

1.电气控制系统的原理设计及工艺设计 2. C534JI立车横梁电气控制系统设计