def train(self):
s = self
for tr in s.trainset:
inp.append(s.trainset[tr][1:])
lst = [0] * 4
lst[s.trainset[tr][0] / 90] = 1
out.append(lst)
#initialize all of our hidden layers (each has numHidden neurons)
np.random.seed(int(time.time()))
W1 = np.random.randn(s.train_dim, s.numHidden) / np.sqrt(s.train_dim)
b1 = np.zeros((1, s.numHidden))
W2 = np.random.randn(s.numHidden, s.numOutput) / np.sqrt(s.numHidden)
b2 = np.zeros((1, s.numOutput))
'''
numWeights = s.train_dim
last = 0
for i in range(s.numLayers):
s.model['w'+str(i)] = np.random.randn(numWeights, s.numHidden) / np.sqrt(numWeights)
s.model['b'+str(i)] = np.zeros((1, s.numHidden))
numWeights = s.numHidden
last = i
last += 1
s.model['w'+str(last)] = np.random.randn(s.numHidden, s.numOutput) / np.sqrt(s.numHidden)
s.model['b'+str(last)] = np.zeros((1, s.numOutput))
'''
inpa = np.array(inp)
outa = np.array(out)
for i in range(s.numPasses):
# Forward propagation
z1 = inpa.dot(W1) + b1
a1 = s.sigmoid(z1)
z2 = a1.dot(W2) + b2
a2 = np.sigmoid(z2)
probs = a2
# Backpropagation
delta3 = np.multiply(-(outa - probs), s.sigmoidprime(z2))
# delta3[range(len(inpa)), outa] -= 1
dW2 = (a1.T).dot(delta3)
db2 = np.sum(delta3, axis=0, keepdims=True)
delta2 = delta3.dot(W2.T) * s.sigmoidprime(z1)
dW1 = np.dot(inpa.T, delta2)
db1 = np.sum(delta2, axis=0)
# Add regularization terms (b1 and b2 don't have regularization terms)
dW2 += s.reg * W2
dW1 += s.reg * W1
# Gradient descent parameter update
W1 += -s.epsilon * dW1
b1 += -s.epsilon * db1
W2 += -s.epsilon * dW2
b2 += -s.epsilon * db2
s.model = {'w1': W1, 'b1': b1, 'w2': W2, 'b2': b2}
'''
def propagate(W, X, Y, b):
m = X.shape[0]
Y_cap = np.sigmoid(X, W, b)
cost = (-1 / (2 * m)) * np.sum(
np.dot(Y.T, np.log(Y_cap)) + np.dot((1 - Y).T, np.log(1 - Y_cap)))
#grad = (1/m)*np.dot(X.T, Y_cap - Y)
return cost
def feedforward(self, a):
"""
Return the ouput of the network if ``a`` is input.
"""
for b, w in zip(self.biases, self.weights):
a = np.sigmoid(np.dot(w, a) + b)
return a
def calc_output(self):
'''
根据式1计算节点的输出
'''
output = reduce(
lambda ret, conn: ret + conn.upstream_node.output * conn.weight,
self.upstream, 0)
self.output = np.sigmoid(output)
def aeneunet(input,num_layers,num_weights): num_biases=num_layers x=sigmoid(input) x=np.append(1,x) theta=np.zeros(num_weights+1)##intialize all weights to zeros L1=(x).dot(np.transpose(theta)) a1=np.sigmoid(L1) return a1
def forward_propagation(self,scatter_plot_values):
iL = scatter_plot_values.dot(self.syn1) + self.back_prop_1 # Map
if self.activation_choice == 0:
self.oL = np.tanh(iL)
syn2_shift = self.oL.dot(self.syn2) + self.back_prop_2
return np.exp(syn2_shift)
elif activation_choice == 1:
return np.sigmoid(iL)
elif activation_choice == 2:
return np.sin(iL)
def prob_X2(data):
logits = data[:, :, 0]
for w in weights[:-1]:
logits = logits * w
logits = np.sigmoid(logits)
logits *= weights[-1]
return naive_softmax(logits)
def __init__(self,
size,
intelligence,
social,
digestion,
strength,
speed,
dexterity,
sex_drive,
mutation_factor=0.04,
hunger=0.5,
thirst=0.5,
health=1):
self.gender = rnd.choice(["male", "female"])
self.mutation_factor = mutation_factor
self.max_size = rnd.normalvariate(size, size * mutation_factor)
self.size = self.max_size / 10
self.max_intelligence = rnd.normalvariate(
intelligence, intelligence * mutation_factor)
self.intelligence = self.max_intelligence / 10
self.max_strength = rnd.normalvariate(strength,
strength * mutation_factor)
self.strength = self.max_strength / 10
self.max_speed = rnd.normalvariate(speed, speed * mutation_factor)
self.speed = self.max_speed / 10
self.max_dexterity = rnd.normalvariate(dexterity,
dexterity * mutation_factor)
self.dexterity = self.max_dexterity / 10
social = math.tan(social)
social = rnd.normalvariate(social, social * mutation_factor)
self.social = math.tanh(social)
digestion = math.tan(digestion)
digestion = rnd.normalvariate(digestion, digestion * mutation_factor)
self.digestion = math.tanh(digestion)
self.hunger = hunger
self.thirst = thirst
self.health = health
self.fitness = np.min(self.hunger, self.thirst, self.health)
sex_drive = math.tan(sex_drive * 2 - 1)
sex_drive = rnd.normalvariate(sex_drive, sex_drive * mutation_factor)
self.max_sex_drive = np.sigmoid(sex_drive)
self.sex_drive = 0
def sigmoid(pre_activated):
return np.sigmoid(pre_activated)
import numpy as np import matplotlib.pyplot as plt xdate = np.linspace(-5, 5) plt.figure() plt.plot(xdate, np.sigmoid(xdate), 'r') plt.show()
def fwd(x, W_1, W_2, b_1, b_2):
z_1 = x * W_1 + b_1
a_1 = np.tanh(z_1)
z_2 = a_1 * W_2 + b_2
a_2 = np.sigmoid(z_2)
return z_1, a_1, z_2, a_2
def sigmoid_py(x, parameter=None, weight=None):
y = np.sigmoid(x).astype(np.float32)
if not hasattr(y, "__len__"):
y = [y]
return y
def sigmoid_F(X):
# forward pass for sigmoid activation
out = np.sigmoid(X)
for_backprop = out
return out, for_backprop
def forward(self,x): for b,w in zip(self.biases,self.weights): x=np.sigmoid(np.dot(w,x)+b) return x
def vectorized_sigmoid(z): return np.sigmoid(z)
import numpy as np
import timeit
from tfrbm.bbrbm import BBRBM
bm = BBRBM(n_visible=76, n_hidden=76)
#dataset = np.array([[0,0,0],[0,1,1],[1,0,1],[1,1,0]])
dataset = int(np.random.rand(76, ) > 0.5).reshape(1, -1)
#import sys
#i = int(sys.argv[1])
#x = dataset[i:i+1].copy()
x = np.array(dataset[0][:76]).reshape(1, -1)
while not np.all(np.logical_and(bm.reconstruct(x), x)):
bm.fit(dataset, n_epoches=1000)
print np.sigmoid(bm.reconstruct(x))
print x
weights = bm.get_weights()
w = weights[0].tolist()
b = np.concatenate([weights[1], weights[2]]).tolist()
print w
print
print b
print
print v
ux = np.reshape(ux, -1)
uy = np.reshape(uy, -1)
if sampleMeshIndices is not None:
ux = np.take(ux, sampleMeshIndices, axis=0)
uy = np.take(uy, sampleMeshIndices, axis=0)
return np.reshape(ux, -1), np.reshape(uy, -1)
def set_inicond(self, case=""):
dx = np.min(self.geom.dX)
L = np.min(self.geom.L)
delta = 0.005 * L
#self.front = lambda x: 1/(1 + np.exp(-x/delta))
self.front = lambda x: 0.5 * (1 + np.tanh(x / delta))
self.forward = lambda x: np.sigmoid(x / delta)
if self.dim == 2:
if case == "pacman":
[X, Y] = self.geom.Xgrid
phi0 = np.sqrt((X - L * (0.4))**2 + (Y - L *
(0.5))**2) - 0.2 * L
q0 = self.front(phi0)
return 1 - reshape(q0, -1)
if case == "bunsen_flame":
return np.reshape((1 - self.penalisation.weights), -1)
else:
return np.reshape(np.zeros(self.geom.N), -1)
else:
if case == "reaction1D":
self.front = lambda x: 0.5 * (1 - np.tanh(x / 2))
return self.front(