File size: 18,091 Bytes
fda421b |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 |
import tensorflow as tf
import numpy as np
import faiss
class MultiModalTransformer(tf.keras.Model):
def __init__(self, hparams, knowledge_base, n_hash=1024, n_quant=256):
super(MultiModalTransformer, self).__init__()
self.hparams = hparams
self.n_hash = n_hash
self.n_quant = n_quant
# Core Transformer components
self.wte = tf.keras.layers.Embedding(hparams.n_vocab, hparams.n_embd)
self.wpe = tf.keras.layers.Embedding(hparams.n_ctx, hparams.n_embd)
self.hash_layer = tf.keras.layers.Dense(n_hash, activation='relu')
self.quant_layer = tf.keras.layers.Dense(n_quant, activation='relu')
self.h = [TransformerBlock(hparams.n_embd, hparams.n_head) for _ in range(hparams.n_layer)]
self.ln_f = tf.keras.layers.LayerNormalization(epsilon=1e-5)
self.fc = tf.keras.layers.Dense(hparams.n_vocab, use_bias=False)
# Speech Recognition
self.audio_encoder = tf.keras.Sequential([
tf.keras.layers.Conv1D(256, kernel_size=11, strides=2, padding='same', activation='relu'),
tf.keras.layers.Conv1D(256, kernel_size=11, strides=2, padding='same', activation='relu'),
tf.keras.layers.Conv1D(256, kernel_size=11, strides=2, padding='same', activation='relu'),
tf.keras.layers.GlobalAveragePooling1D(),
tf.keras.layers.Dense(hparams.n_embd)
])
# Image Captioning
self.image_encoder = tf.keras.applications.ResNet50(include_top=False, weights='imagenet')
self.image_proj = tf.keras.layers.Dense(hparams.n_embd)
# Music Generation
self.pitch_embedding = tf.keras.layers.Embedding(128, hparams.n_embd)
self.duration_embedding = tf.keras.layers.Embedding(32, hparams.n_embd)
self.velocity_embedding = tf.keras.layers.Embedding(128, hparams.n_embd)
# Anomaly Detection
self.anomaly_threshold = tf.Variable(0.5, trainable=False)
# RAG
self.knowledge_base = knowledge_base
self.retriever = FAISSRetriever(knowledge_base)
self.query_encoder = tf.keras.Sequential([
tf.keras.layers.Dense(hparams.n_embd, activation='relu'),
tf.keras.layers.Dense(hparams.n_embd)
])
# Task-specific output layers
self.speech_output = tf.keras.layers.Dense(hparams.n_vocab)
self.caption_output = tf.keras.layers.Dense(hparams.n_vocab)
self.music_output = tf.keras.layers.Dense(288) # 128 (pitch) + 32 (duration) + 128 (velocity)
self.anomaly_output = tf.keras.layers.Dense(1, activation='sigmoid')
# Conversation history
self.conversation_history = []
# Personality traits
self.personality_traits = {
'kindness': 0.9,
'honesty': 0.9,
'resilience': 0.8,
'open_mindedness': 0.8,
'empathy': 0.9,
'reliability': 0.9,
'humility': 0.8,
'positivity': 0.9,
'courage': 0.8,
'curiosity': 0.9,
'humor': 0.8,
'self_discipline': 0.8,
'emotional_stability': 0.8,
'assertiveness': 0.8,
'creativity': 0.9
}
def call(self, inputs, task):
if task == 'speech_recognition':
x = self.audio_encoder(inputs)
elif task == 'image_captioning':
image, text = inputs
image_features = self.image_encoder(image)
image_features = self.image_proj(tf.keras.layers.GlobalAveragePooling2D()(image_features))
x = tf.concat([image_features[:, tf.newaxis, :], self.wte(text)], axis=1)
elif task == 'music_generation':
pitch, duration, velocity = inputs
x = self.pitch_embedding(pitch) + self.duration_embedding(duration) + self.velocity_embedding(velocity)
elif task in ['text_generation', 'anomaly_detection']:
x = self.wte(inputs)
else:
raise ValueError(f"Unknown task: {task}")
# RAG for text-based tasks
if task in ['text_generation', 'image_captioning']:
query = x[:, 0, :] # Use first token as query
encoded_query = self.query_encoder(query)
retrieved_docs = self.retriever.retrieve(encoded_query)
x = tf.concat([x, self.wte(retrieved_docs)], axis=1)
# Add positional embeddings
position = tf.range(0, x.shape[1], dtype=tf.int32)[tf.newaxis, :]
x = x + self.wpe(position)
# Apply core Transformer layers
x = self.hash_layer(x)
x = self.quant_layer(x)
for layer in self.h:
x, _ = layer(x)
x = self.ln_f(x)
# Task-specific outputs
if task == 'speech_recognition':
return self.speech_output(x)
elif task == 'image_captioning':
return self.caption_output(x)
elif task == 'music_generation':
return self.music_output(x)
elif task == 'anomaly_detection':
reconstruction = self.fc(x)
reconstruction_loss = tf.reduce_mean(tf.square(inputs - reconstruction), axis=-1)
anomaly_scores = tf.where(reconstruction_loss > self.anomaly_threshold, 1.0, 0.0)
return reconstruction, anomaly_scores
else: # text_generation
return self.fc(x)
def pipe(self, inputs, task):
if task == 'speech_recognition':
return self.call(inputs, task)
elif task == 'image_captioning':
return self.call(inputs, task)
elif task == 'music_generation':
return self.call(inputs, task)
elif task == 'text_generation':
return self.call(inputs, task)
elif task == 'anomaly_detection':
return self.call(inputs, task)
else:
raise ValueError(f"Unknown task: {task}")
def conversation(self, user_input):
# Add user input to conversation history
self.conversation_history.append(user_input)
# Generate response based on conversation history and personality traits
response = self.generate_response(self.conversation_history)
# Add response to conversation history
self.conversation_history.append(response)
return response
def generate_response(self, conversation_history):
# Concatenate conversation history into a single input
conversation_input = tf.concat(conversation_history, axis=0)
# Generate response using the model
response = self.pipe(conversation_input, task='text_generation')
# Apply personality traits to the response
response = self.apply_personality_traits(response)
return response
def apply_personality_traits(self, response):
# Apply personality traits to the response
for trait, value in self.personality_traits.items():
if trait == 'kindness':
response = self.add_kindness(response, value)
elif trait == 'honesty':
response = self.add_honesty(response, value)
elif trait == 'resilience':
response = self.add_resilience(response, value)
elif trait == 'open_mindedness':
response = self.add_open_mindedness(response, value)
elif trait == 'empathy':
response = self.add_empathy(response, value)
elif trait == 'reliability':
response = self.add_reliability(response, value)
elif trait == 'humility':
response = self.add_humility(response, value)
elif trait == 'positivity':
response = self.add_positivity(response, value)
elif trait == 'courage':
response = self.add_courage(response, value)
elif trait == 'curiosity':
response = self.add_curiosity(response, value)
elif trait == 'humor':
response = self.add_humor(response, value)
elif trait == 'self_discipline':
response = self.add_self_discipline(response, value)
elif trait == 'emotional_stability':
response = self.add_emotional_stability(response, value)
elif trait == 'assertiveness':
response = self.add_assertiveness(response, value)
elif trait == 'creativity':
response = self.add_creativity(response, value)
return response
def add_kindness(self, response, value):
# Add kindness to the response
if value > 0.5:
response = f"I understand your concern. {response}"
return response
def add_honesty(self, response, value):
# Add honesty to the response
if value > 0.5:
response = f"To be honest, {response}"
return response
def add_resilience(self, response, value):
# Add resilience to the response
if value > 0.5:
response = f"Let's keep trying. {response}"
return response
def add_open_mindedness(self, response, value):
# Add open-mindedness to the response
if value > 0.5:
response = f"That's an interesting perspective. {response}"
return response
def add_empathy(self, response, value):
# Add empathy to the response
if value > 0.5:
response = f"I can see how you feel. {response}"
return response
def add_reliability(self, response, value):
# Add reliability to the response
if value > 0.5:
response = f"You can count on me. {response}"
return response
def add_humility(self, response, value):
# Add humility to the response
if value > 0.5:
response = f"I'm still learning. {response}"
return response
def add_positivity(self, response, value):
# Add positivity to the response
if value > 0.5:
response = f"Let's stay positive. {response}"
return response
def add_courage(self, response, value):
# Add courage to the response
if value > 0.5:
response = f"Let's face this together. {response}"
return response
def add_curiosity(self, response, value):
# Add curiosity to the response
if value > 0.5:
response = f"That's fascinating. {response}"
return response
def add_humor(self, response, value):
# Add humor to the response
if value > 0.5:
response = f"On a lighter note, {response}"
return response
def add_self_discipline(self, response, value):
# Add self-discipline to the response
if value > 0.5:
response = f"Let's stay focused. {response}"
return response
def add_emotional_stability(self, response, value):
# Add emotional stability to the response
if value > 0.5:
response = f"Let's stay calm. {response}"
return response
def add_assertiveness(self, response, value):
# Add assertiveness to the response
if value > 0.5:
response = f"I firmly believe that {response}"
return response
def add_creativity(self, response, value):
# Add creativity to the response
if value > 0.5:
response = f"Let's think outside the box. {response}"
return response
def fine_tune_personality(self, trait, value):
# Fine-tune the personality trait
if trait in self.personality_traits:
self.personality_traits[trait] = value
else:
raise ValueError(f"Unknown trait: {trait}")
def safe_word_format(self, user_input):
# Safe word format for user control
if user_input.lower() == "stop":
self.conversation_history = []
return "Conversation stopped. You can start a new conversation."
elif user_input.lower() == "reset":
self.conversation_history = []
return "Conversation reset. Let's start fresh."
else:
return None
class TransformerBlock(tf.keras.layers.Layer):
def __init__(self, n_embd, n_head):
super(TransformerBlock, self).__init__()
self.attn = MultiHeadAttention(n_embd, n_head)
self.ln_1 = tf.keras.layers.LayerNormalization(epsilon=1e-5)
self.mlp = tf.keras.Sequential([
tf.keras.layers.Dense(4 * n_embd, activation=gelu),
tf.keras.layers.Dense(n_embd)
])
self.ln_2 = tf.keras.layers.LayerNormalization(epsilon=1e-5)
def call(self, x, past=None):
a, present = self.attn(self.ln_1(x), past=past)
x = x + a
m = self.mlp(self.ln_2(x))
x = x + m
return x, present
class MultiHeadAttention(tf.keras.layers.Layer):
def __init__(self, n_embd, n_head):
super(MultiHeadAttention, self).__init__()
self.n_embd = n_embd
self.n_head = n_head
self.c_attn = tf.keras.layers.Dense(3 * n_embd)
self.c_proj = tf.keras.layers.Dense(n_embd)
def split_heads(self, x):
return tf.transpose(tf.reshape(x, (*x.shape[:-1], self.n_head, -1)), [0, 2, 1, 3])
def merge_heads(self, x):
return tf.reshape(tf.transpose(x, [0, 2, 1, 3]), (*x.shape[:-3], -1))
def call(self, x, past=None):
c = self.c_attn(x)
q, k, v = tf.split(c, 3, axis=-1)
q, k, v = map(self.split_heads, [q, k, v])
if past is not None:
pk, pv = past
k = tf.concat([pk, k], axis=-2)
v = tf.concat([pv, v], axis=-2)
present = tf.stack([k, v], axis=1)
a = tf.matmul(q, k, transpose_b=True) / tf.math.sqrt(tf.cast(v.shape[-1], tf.float32))
a = tf.nn.softmax(a)
a = tf.matmul(a, v)
a = self.merge_heads(a)
a = self.c_proj(a)
return a, present
class FAISSRetriever:
def __init__(self, knowledge_base, dim=768, num_results=5):
self.index = faiss.IndexFlatL2(dim)
self.knowledge_base = knowledge_base
self.num_results = num_results
vectors = [doc['vector'] for doc in knowledge_base]
self.index.add(np.array(vectors))
def retrieve(self, query_vector):
distances, indices = self.index.search(query_vector.numpy(), self.num_results)
retrieved_docs = [self.knowledge_base[i]['text'] for i in indices[0]]
return tf.constant(retrieved_docs)
def gelu(x):
return 0.5 * x * (1 + tf.tanh(np.sqrt(2 / np.pi) * (x + 0.044715 * tf.pow(x, 3))))
# Custom loss function
def custom_loss(y_true, y_pred, model, task):
if task == 'anomaly_detection':
mse = tf.keras.losses.MeanSquaredError()
return mse(y_true, y_pred)
else:
ce_loss = tf.keras.losses.sparse_categorical_crossentropy(y_true, y_pred, from_logits=True)
reg_loss = tf.reduce_sum([tf.nn.l2_loss(w) for w in model.trainable_weights])
return ce_loss + 0.01 * reg_loss
# Training function
@tf.function
def train_step(model, optimizer, inputs, targets, task):
with tf.GradientTape() as tape:
predictions = model(inputs, task)
loss = custom_loss(targets, predictions, model, task)
gradients = tape.gradient(loss, model.trainable_variables)
optimizer.apply_gradients(zip(gradients, model.trainable_variables))
return loss
# Hyperparameters
class HParams:
def __init__(self, n_vocab, n_ctx, n_embd, n_head, n_layer):
self.n_vocab = n_vocab
self.n_ctx = n_ctx
self.n_embd = n_embd
self.n_head = n_head
self.n_layer = n_layer
hparams = HParams(
n_vocab=50000,
n_ctx=1024,
n_embd=768,
n_head=12,
n_layer=12
)
# Initialize knowledge base (for demonstration)
knowledge_base = [
{'text': 'Example knowledge 1', 'vector': np.random.rand(768)},
{'text': 'Example knowledge 2', 'vector': np.random.rand(768)},
# ... more entries ...
]
# Initialize model
model = MultiModalTransformer(hparams, knowledge_base)
# Initialize optimizer
optimizer = tf.keras.optimizers.Adam(learning_rate=1e-4)
# Training loop (pseudo-code)
num_epochs = 10
for epoch in range(num_epochs):
for batch in dataset:
inputs, targets, task = batch
loss = train_step(model, optimizer, inputs, targets, task)
print(f"Epoch {epoch + 1}, Loss: {loss.numpy()}")
# Example usage
speech_input = tf.random.normal((1, 16000, 1)) # 1 second of audio at 16kHz
speech_output = model(speech_input, task='speech_recognition')
image_input = tf.random.normal((1, 224, 224, 3))
text_input = tf.random.uniform((1, 10), maxval=50000, dtype=tf.int32)
caption_output = model([image_input, text_input], task='image_captioning')
music_input = [
tf.random.uniform((1, 100), maxval=128, dtype=tf.int32), # pitch
tf.random.uniform((1, 100), maxval=32, dtype=tf.int32), # duration
tf.random.uniform((1, 100), maxval=128, dtype=tf.int32) # velocity
]
music_output = model(music_input, task='music_generation')
text_input = tf.random.uniform((1, 50), maxval=50000, dtype=tf.int32)
text_output = model(text_input, task='text_generation')
anomaly_input = tf.random.normal((1, 100, 768))
reconstructed, anomalies = model(anomaly_input, task='anomaly_detection')
# Example conversation
user_input = "Hello, how are you?"
response = model.conversation(user_input)
print(response)
# Fine-tune personality trait
model.fine_tune_personality('kindness', 0.95)
# Safe word control
user_input = "stop"
response = model.safe_word_format(user_input)
print(response) |