4.3.2 Find the Fourier transforms (with f= 0 outside the ranges given) of (a) f(x)= 1 for 0 < x <L (b) f(x)= 1 for x < 0 (c) f(x)= So eikx dk (d) the finite wave train f(x)=sin x for 0<x< 107
The discrete Fourier transform of an mxn matrix X = (Xj.k) is an m x n matrix X = (ĉik) m,n ypj yqk pqSm Sn, p.q=1 where Šm = e270i/m The corresponding inverse Fourier transform is m.n Xj,k = (mn)-1 » počinje-k. p, Sm Sn . peq=1 Let X and Y be mxn matrices with the discrete Fourier transforms X and Y respectively. Define two dimensional circular convolution Z = X * Y to be min Za,b = XXj,kYa–j,b-k j,k=1...
(8). The one dimensional neutron diffusion equation with a (plane) source at x-0 is d'f(x) n (2) +002 f (x)-00(x) dx where f(x) is the flux of neutrons (f(x)→0 as x→±o), Q δ (x) is the (plane) source at x-0 (5(x) is the Dirac delta function), and o is a constant. This problem involves finding the solution to this equation using Fourier Transforms. You may use the formulas derived in class for the Fourier Transform of derivatives, but otherwise compute...
0,x<-1 -100,-1
Find a Fourier series representation in the form x(t)-xp ol + 〉 2 KI k || cos(kat+ X | k |) of a. に! the impulse train and plot the spectrum of the series through the 5th harmonic. Write out the first five terms of the Fourier series of x(t) b. Now, find a Fourier series representation in the form x(t)=X[0] +Σ2k[k] cos(kay + X[k]) of the following (periodic) square wave に! 0 To To/2 To and plot the spectrum...
The following differential equation is the equation of motion for an ideal spring-mass system with damping and an external force F(t) m. x C. x If m1 = 1kg, c = 5N.s/m, k = 4 N/m F(t) = 2N And x'(0)=x(0)=0 Find the solution of this differential equation using Laplace transforms. F(t) 7m The following differential equation is the equation of motion for an ideal spring-mass system with damping and an external force F(t) m. x C. x If m1...
fourier analysis 6. Use Fourier transform to solve the wave problenm: 25 OP 1 ifx〈0 a(x,0) = if r > 0 0 (2,0) = 0 Ot 6. Use Fourier transform to solve the wave problenm: 25 OP 1 ifx〈0 a(x,0) = if r > 0 0 (2,0) = 0 Ot
Problem 3: Let x(n) be an arbitrary signal, not necessarily real valued, with Fourier transform X (w). Express the Fourier transforms of the following signals in terms of X() (C) y(n) = x(n)-x(n-1) (d) v(n) -00x(k) (e) y(n)=x(2n) (f) y n even n odd , x(n/2), (n) 0 Problem 4: etermine the signal x(n) if its Fourier transform is as given in Fig. P4.12. X(a) 0 10 10 10 X(o) 0 X(a) Figure P4.12 Problem 3: Let x(n) be an...
Consider an electron moving in a spherically symmetric potential V = kr, where k>0. (a) Use the uncertainty principle to estimate the ground state energy. (b) Use the Bohr-Sommerfeld quantization rule to calculate the ground state energy. (c) Do the same using the variational principle and a trial wave function of your own choice. (d) Solve for the energy eigenvalue and eigenfunction exactly for the ground state. (Hint: Use Fourier transforms.) (e) Write down the effective potential for nonzero angular...
need help solving thank you Fourier Transforms • Find the Fourier transform of et if -a<x<a 0 otherwise. • Find the Fourier transform of S f(0) = 3 10 if - 1<x<1 otherwise