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model.py
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model.py
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import tensorflow as tf
import nn
import pdb
class PermEqui1_max(nn.Module):
def __init__(self, in_dim, out_dim):
super(PermEqui1_max, self).__init__()
self.Gamma = nn.Linear(in_dim, out_dim)
def forward(self, x):
xm = tf.reduce_max(x, axis=1, keepdims=True)
x = self.Gamma(x-xm)
return x
class PermEqui2_max(nn.Module):
def __init__(self, in_dim, out_dim):
super(PermEqui2_max, self).__init__()
self.Gamma = nn.Linear(in_dim, out_dim)
self.Lambda = nn.Linear(in_dim, out_dim, bias=False)
def forward(self, x):
xm = tf.reduce_max(x, axis=1, keepdims=True)
xm = self.Lambda(xm)
x = self.Gamma(x)
x = x - xm
return x
class PermEqui2_mean(nn.Module):
def __init__(self, in_dim, out_dim):
super(PermEqui2_mean, self).__init__()
self.Gamma = nn.Linear(in_dim, out_dim)
self.Lambda = nn.Linear(in_dim, out_dim, bias=False)
def forward(self, x):
xm = tf.reduce_mean(x, axis=1, keepdims=True)
xm = self.Lambda(xm)
x = self.Gamma(x)
x = x - xm
return x
class G_inv_Tanh(nn.Module):
def __init__(self, x_dim, d_dim, z1_dim, pool = 'mean'):
super(G_inv_Tanh, self).__init__()
self.d_dim = d_dim
self.x_dim = x_dim
self.z1_dim = z1_dim
self.pool = pool
if pool == 'max':
self.phi = nn.Sequential(
PermEqui2_max(self.x_dim, self.d_dim),
nn.Tanh(),
PermEqui2_max(self.d_dim, self.d_dim),
nn.Tanh(),
PermEqui2_max(self.d_dim, self.d_dim),
nn.Tanh(),
)
elif pool == 'max1':
self.phi = nn.Sequential(
PermEqui1_max(self.x_dim, self.d_dim),
nn.Tanh(),
PermEqui1_max(self.d_dim, self.d_dim),
nn.Tanh(),
PermEqui1_max(self.d_dim, self.d_dim),
nn.Tanh(),
)
elif pool == 'mean':
self.phi = nn.Sequential(
PermEqui2_mean(self.x_dim, self.d_dim),
nn.Tanh(),
PermEqui2_mean(self.d_dim, self.d_dim),
nn.Tanh(),
PermEqui2_mean(self.d_dim, self.d_dim),
nn.Tanh(),
)
self.ro = nn.Sequential(
nn.Linear(self.d_dim, self.d_dim),
nn.Tanh(),
nn.Linear(self.d_dim, self.z1_dim),
)
print(self)
self.faster_parameters = [p for p in self.parameters()]
def forward(self, x):
phi_output = self.phi(x)
if self.pool == 'max' or self.pool == 'max1':
sum_output = tf.reduce_max(phi_output, 1)
elif self.pool == 'mean':
sum_output = tf.reduce_mean(phi_output, 1)
ro_output = self.ro(sum_output)
return ro_output
class skipD(nn.Module):
def __init__(self, x_dim, z1_dim, d_dim, o_dim=1):
super(skipD, self).__init__()
self.d_dim = d_dim
self.x_dim = x_dim
self.z1_dim = z1_dim
#hid_d = 5*(z1_dim+z2_dim)
hid_d = max(1024, 2*z1_dim)
self.fc = nn.Linear(self.z1_dim, hid_d)
self.fu = nn.Linear(self.x_dim, hid_d, bias=False)
self.part1 = nn.Sequential(
nn.Softplus(),
nn.Linear(hid_d, hid_d),
nn.Softplus(),
nn.Linear(hid_d, hid_d - self.z1_dim),
)
self.sc = nn.Linear(self.z1_dim, hid_d)
self.su = nn.Linear(hid_d - self.z1_dim, hid_d, bias=False)
self.part2 = nn.Sequential(
nn.Softplus(),
nn.Linear(hid_d, hid_d),
nn.Softplus(),
nn.Linear(hid_d, hid_d - self.z1_dim)
)
self.tc = nn.Linear(self.z1_dim, hid_d)
self.tu = nn.Linear(hid_d - self.z1_dim, hid_d, bias=False)
self.part3 = nn.Sequential(
nn.Softplus(),
nn.Linear(hid_d, hid_d),
nn.Softplus(),
nn.Linear(hid_d, o_dim)
)
print(self)
self.faster_parameters = [p for p in self.parameters()]
def forward(self, x, z1):
y = self.fc(z1) + self.fu(x)
output = self.part1(y)
y2 = self.sc(z1) + self.su(output)
output1 = self.part2( y2 )
y3 = self.tc(z1) + self.tu(output1)
output2 = self.part3( y3 )
return output2
class G(nn.Module):
def __init__(self, x_dim, z1_dim, z2_dim):
super(G, self).__init__()
self.z1_dim = z1_dim
self.z2_dim = z2_dim
self.x_dim = x_dim
hid_d = max(250, 2*z1_dim)
#hid_d = z1_dim+z2_dim
self.fc = nn.Linear(self.z1_dim, hid_d)
self.fu = nn.Linear(self.z2_dim, hid_d, bias=False)
self.main = nn.Sequential(
nn.Softplus(),
nn.Linear(hid_d, hid_d),
nn.Softplus(),
nn.Linear(hid_d, hid_d),
nn.Softplus(),
nn.Linear(hid_d, hid_d),
nn.Softplus(),
nn.Linear(hid_d, hid_d),
nn.Softplus(),
nn.Linear(hid_d, self.x_dim),
)
print(self)
self.faster_parameters = [p for p in self.parameters()]
def forward(self, z1, z2):
x = self.fc(z1) + self.fu(z2)
output = self.main(x)
return output