方程组求解实例（可以出图）
..........................\chaoslorenz.m
..........................\eq1.m
..........................\eq2.m
..........................\eq3.m
..........................\eq4.m
..........................\ff1.m
..........................\ff2.m
..........................\ff3.m
..........................\ff4.m
..........................\ff5.m
..........................\ff6.m
..........................\lorenzeq.m
..........................\rigid.m
..........................\解方程.pps