假设某个系统可以由如下的框图表示,则其输入输出关系为________。[img=389x128]1802eb9e0725973.png[/img]
A: y[n] = p0x[n] – p1x[n-1] – d1y[n-1]
B: y[n] = p0x[n] + p1x[n-1] – d1y[n-1]
C: y[n] = p0x[n] – p1x[n+1] – d1y[n+1]
D: y[n] = p0x[n] + p1x[n+1] – d1y[n+1]
A: y[n] = p0x[n] – p1x[n-1] – d1y[n-1]
B: y[n] = p0x[n] + p1x[n-1] – d1y[n-1]
C: y[n] = p0x[n] – p1x[n+1] – d1y[n+1]
D: y[n] = p0x[n] + p1x[n+1] – d1y[n+1]
举一反三
- 设随机变量X和Y相互独立且X~N(0,1),Y~N(1,1),则( ). A: P{X + Y £ 0} = 1/2 B: P{X + Y £ 1} = 1/2 C: P{X - Y £ 0} = 1/2 D: P{X - Y £ 1} = 1/2
- 判断差分系统的因果性(1)y(n)=x(n+1)-x(n)(2)y(n)=x(n)-x(n-1)
- 随机变量X ~ N ( 0 , 1 ),Y ~ N ( 0 , 1 ),且相关系数[img=61x22]1803395efc2083a.png[/img],则( ). A: P{ Y = -2X -1} = 1 B: P{ Y = 2X -1} = 1 C: P{ Y = -2X + 1} = 1 D: P{ Y = 2X + 1} = 1
- 随机变量X ~ N ( 0 , 1 ),Y ~ N ( 0 , 1 ),且相关系数[img=61x22]180390b1ffcc8de.png[/img],则( ). A: P{ Y = -2X -1} = 1 B: P{ Y = 2X -1} = 1 C: P{ Y = -2X + 1} = 1 D: P{ Y = 2X + 1} = 1
- 随机变量X ~ N ( 0 , 1 ),Y ~ N ( 0 , 1 ),且相关系数[img=61x22]180387df0f4f1da.png[/img],则( ). A: P{ Y = -2X -1} = 1 B: P{ Y = 2X -1} = 1 C: P{ Y = -2X + 1} = 1 D: P{ Y = 2X + 1} = 1