# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import math from collections import OrderedDict import paddle.fluid as fluid from paddlerec.core.utils import envs from paddlerec.core.model import Model as ModelBase class Model(ModelBase): def __init__(self, config): ModelBase.__init__(self, config) def _init_hyper_parameters(self): self.is_distributed = True if envs.get_trainer( ) == "CtrTrainer" else False self.sparse_feature_number = envs.get_global_env( "hyper_parameters.sparse_feature_number", None) self.sparse_feature_dim = envs.get_global_env( "hyper_parameters.sparse_feature_dim", None) self.is_sparse = envs.get_global_env("hyper_parameters.is_sparse", False) self.use_batchnorm = envs.get_global_env( "hyper_parameters.use_batchnorm", False) self.filters = envs.get_global_env("hyper_parameters.filters", [38, 40, 42, 44]) self.filter_size = envs.get_global_env("hyper_parameters.filter_size", [1, 9]) self.pooling_size = envs.get_global_env( "hyper_parameters.pooling_size", [2, 2, 2, 2]) self.new_filters = envs.get_global_env("hyper_parameters.new_filters", [3, 3, 3, 3]) self.hidden_layers = envs.get_global_env("hyper_parameters.fc_sizes") self.num_field = envs.get_global_env("hyper_parameters.num_field", None) self.act = envs.get_global_env("hyper_parameters.act", None) def net(self, inputs, is_infer=False): raw_feat_idx = self._sparse_data_var[1] # (batch_size * num_field) * 1 raw_feat_value = self._dense_data_var[0] # batch_size * num_field self.label = self._sparse_data_var[0] # batch_size * 1 init_value_ = 0.1 feat_idx = raw_feat_idx feat_value = fluid.layers.reshape( raw_feat_value, [-1, self.num_field, 1]) # batch_size * num_field * 1 # ------------------------- Embedding layers -------------------------- feat_embeddings_re = fluid.embedding( input=feat_idx, is_sparse=self.is_sparse, is_distributed=self.is_distributed, dtype='float32', size=[self.sparse_feature_number + 1, self.sparse_feature_dim], padding_idx=0, param_attr=fluid.ParamAttr( initializer=fluid.initializer.TruncatedNormalInitializer( loc=0.0, scale=init_value_ / math.sqrt(float(self.sparse_feature_dim)))) ) # (batch_size * num_field) * 1 * embedding_size feat_embeddings = fluid.layers.reshape( feat_embeddings_re, shape=[-1, self.num_field, self.sparse_feature_dim ]) # batch_size * num_field * embedding_size feat_embeddings = feat_embeddings * feat_value # batch_size * num_field * embedding_size featuer_generation_input = fluid.layers.reshape( feat_embeddings, shape=[0, 1, self.num_field, self.sparse_feature_dim]) new_feature_list = [] new_feature_field_num = 0 # ------------------------- Feature Generation -------------------------- for i in range(len(self.filters)): conv_out = fluid.layers.conv2d( featuer_generation_input, num_filters=self.filters[i], filter_size=self.filter_size, padding="SAME", act="tanh") pool_out = fluid.layers.pool2d( conv_out, pool_size=[self.pooling_size[i], 1], pool_type="max", pool_stride=[self.pooling_size[i], 1]) pool_out_shape = pool_out.shape[2] new_feature_field_num += self.new_filters[i] * pool_out_shape flat_pool_out = fluid.layers.flatten(pool_out) recombination_out = fluid.layers.fc(input=flat_pool_out, size=self.new_filters[i] * self.sparse_feature_dim * pool_out_shape, act='tanh') new_feature_list.append(recombination_out) featuer_generation_input = pool_out new_featues = fluid.layers.concat(new_feature_list, axis=1) new_features_map = fluid.layers.reshape( new_featues, shape=[0, new_feature_field_num, self.sparse_feature_dim]) all_features = fluid.layers.concat( [feat_embeddings, new_features_map], axis=1) interaction_list = [] for i in range(all_features.shape[1]): for j in range(i + 1, all_features.shape[1]): interaction_list.append( fluid.layers.reduce_sum( all_features[:, i, :] * all_features[:, j, :], dim=1, keep_dim=True)) new_feature_dnn_input = fluid.layers.concat(interaction_list, axis=1) feat_embeddings_dnn_input = fluid.layers.reshape( feat_embeddings, shape=[0, self.num_field * self.sparse_feature_dim]) dnn_input = fluid.layers.concat( [feat_embeddings_dnn_input, new_feature_dnn_input], axis=1) # ------------------------- DNN -------------------------- fcs = [dnn_input] for size in self.hidden_layers: output = fluid.layers.fc( input=fcs[-1], size=size, act=self.act, param_attr=fluid.ParamAttr( initializer=fluid.initializer.Normal( scale=1.0 / math.sqrt(fcs[-1].shape[1])))) fcs.append(output) predict = fluid.layers.fc( input=fcs[-1], size=1, act="sigmoid", param_attr=fluid.ParamAttr(initializer=fluid.initializer.Normal( scale=1 / math.sqrt(fcs[-1].shape[1])))) # ------------------------- Predict -------------------------- self.predict = predict cost = fluid.layers.log_loss( input=self.predict, label=fluid.layers.cast(self.label, "float32")) avg_cost = fluid.layers.reduce_sum(cost) self._cost = avg_cost predict_2d = fluid.layers.concat([1 - self.predict, self.predict], 1) label_int = fluid.layers.cast(self.label, 'int64') auc_var, batch_auc_var, _ = fluid.layers.auc(input=predict_2d, label=label_int, slide_steps=0) self._metrics["AUC"] = auc_var self._metrics["BATCH_AUC"] = batch_auc_var if is_infer: self._infer_results["AUC"] = auc_var