正弦波，三角波，方波绘制图并发声，可根据频率，幅度，相位，生成声音和波形图-Sine wave, triangle wave, square wave drawing and sound, according to the frequency, amplitude, phase, generating sound and waveform graph

逆变器的原理及正弦波的实现，不同于传统方波-Sine wave inverter, and the realization of the principle, different from the traditional square-wave

采用格子波尔兹曼方法编写的二维方腔流程序-cavity flow using Lattice boltzmann method