Assume that Z(t) = X(t) + Y(t), where X(t) and Y(t) are jointly stationaryrandom processes,then Sz(f) = Sx(f) + Sy(f)
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1.Assume that Z(t) = X(t) + Y(t), where X(t) and Y(t) are jointly stationaryrandom processes,then Sz(f)
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2.5.已知y(t)=f(t)* h()= f(r)h(t- r)d则f(-t)※h(-t)f(t)w h'(t)=(3t)*h(3t)=果请用y(t)表示)
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3.C.f(t)*(t)=f(t)D.f(t)*(t)=f(t)
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4.8.下列等式不成立的是A(T-t)*2(t to)=f()*f().[(*)dtf2(t)A、f(t)*8(t)=f(n)B、f()*(t)=f(t
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5.8. f(t)* tu()=tu(t)f(t
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6.f(u)du=t f(u)du x f(u)du,f(x)
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7.A.t=f(x,τ)B.t=f(x,y,z)C.t=f(x,y)D.t=f(x)
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8.函数A、y = u n , u =cos x nB、y = t , t =cos n xC、y = t n , t =cos xD、y =cos t , t = x n
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9.Kpol={数域k上的一元多项式函数},对于f,g∈Kpol,(f g)(t)等于什么?()A、f(t) g(t)B、f(t)g(t)C、f(g(t))D、g(f(t))
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10.(4)f(t)=1 t