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SPGD_alhoritm_fi_final.py
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SPGD_alhoritm_fi_final.py
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import numpy as np
from math import pi, exp
import random
import itertools
lmbda = 0.5e-6 # длина волны
k = 2 * pi / lmbda # Волновое число
z = 4 # Расстояние от XY до UV (Тогда u, v береv в диапазоне [-0.01, 0.01]), чтобы диапазон углов был в [-5, 5]
m = k / z
E0 = 1
def I_0(fi, zss=0, a=0.003):
for i in range(4):
zss += E0 / (1j * lmbda * z) * (a ** 2) * (np.cos(fi[i]) + 1j * np.sin(fi[i]))
E = abs(zss) ** 2
return E
x_ = np.linspace(0, 2*pi, 16)
fi = [p for p in itertools.product(x_, repeat=4)]
lr = 3
for f in range(1, 65537):
if f % 1000 == 0:
print(f/65536*100, '%')
for i in range(40):
delta = [-0.03, 0.03]
dfi = []
for j in range(4):
dfi.append(random.choice(delta))
dfi = np.array(dfi)
if I_0(fi[f-1] + dfi) > I_0(fi[f-1]):
b = 1
else:
b = -1
fi[f-1] = fi[f-1] + lr * b * dfi
file1 = open(f'D:\\my_pyhton_projects\\nn_sarov\\best_version\\fi_finished\\fi_finished{f}.txt', 'w')
file1.write(str(fi[f-1]))
file1.close()