Interpretations With noise in the system, the model is of the form =AC+ Bu+ Buw, y= Ca +U And the estimator is of the form =Ai+ Bu+L(y-9,y=Ci e Analysis: in this case: C-I=[AT+ Bu+Buw-[Ac+ Bu+L(y-gI A(-)-L(CI-Ca)+B
3.1 X(eo)=2xnJe-jon where x[n] is a real sequence. Therefore X(e)=Rl∑xnlo/。 ∑xR(-mu)=∑ x[n]cos(on),and xmm)=m∑刈nm∑刈mc-m)=-2 xn] sin(oon) Since cos(on)and sin(on)are, respectively, even and odd functions of o, Xre(eJo) is an even function of o
多元函数 定义 11.2.1 设 D 是 n R 上的点集,D 到 R 的映射 f : D →R, x 6 z 称为 n 元函数,记为 = fz x)( 。这时,D 称为 f 的定义域, f D)( = ∈ R = fzz xx ∈ D}),(|{ 称为 f 的值域,Γ= }),(|),{( 1 R ∈=∈ D + x fzz xx n 称 为 f 的图象