: q, }, h3 V6 F5 ~函数 f(x)=a+b*sin(c*x+d) .: ]* D+ j2 z7 K1 t
avg 是队列平均值/ _) d+ u( e6 \7 V
a b c d 为参数 a范围 (2/3,1)*avg: Y8 z0 m+ P7 P. }- `# F
b范围 (0,1/3)*avg : s% T2 ^! j8 C. R- x9 hc的范围 (0,24*pi) / J# c$ _# N, p% F( Z, Qd (0,2*pi)" Z Y2 G ^# b4 @+ L