Useful resource for deep learning

本文深入探讨了深度学习中关键的归一化方法,包括BatchNormalization等技术,旨在帮助读者理解如何通过归一化提升模型训练效率和性能。文章提供了详实的理论依据,并附带了相关资源链接,如《深度学习理论》幻灯片和David Silver的强化学习概述视频。

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  • Batch Normalization
    “An overview of normalization methods in deep learning”
    http://mlexplained.com/2018/11/30/an-overview-of-normalization-methods-in-deep-learning/
  • Theory of Deep learning (Slides)
    https://people.csail.mit.edu/madry/6.883/
  • Reinforcement learning Overview by David Silver (Video)
  • http://videolectures.net/rldm2015_silver_reinforcement_learning/
### Hierarchical Embedding Model for Personalized Product Search In machine learning, hierarchical embedding models aim to capture the intricate relationships between products and user preferences by organizing items within a structured hierarchy. This approach facilitates more accurate recommendations and search results tailored specifically towards individual users' needs. A hierarchical embedding model typically involves constructing embeddings that represent both product features and their positions within a category tree or other organizational structures[^1]. For personalized product searches, this means not only capturing direct attributes of each item but also understanding how these relate across different levels of abstraction—from specific brands up through broader categories like electronics or clothing. To train such models effectively: - **Data Preparation**: Collect data on user interactions with various products along with metadata describing those goods (e.g., price range, brand name). Additionally, gather information about any existing hierarchies used in categorizing merchandise. - **Model Architecture Design**: Choose an appropriate neural network architecture capable of processing multi-level inputs while maintaining computational efficiency during training sessions. Techniques from contrastive learning can be particularly useful here as they allow systems to learn meaningful representations even when labels are scarce or noisy[^3]. - **Objective Function Formulation**: Define loss functions aimed at optimizing performance metrics relevant for ranking tasks; minimizing negative log-likelihood serves well as it encourages correct predictions over incorrect ones[^4]. Here’s a simplified example using Python code snippet demonstrating part of what might go into building one aspect of this kind of system—learning embeddings based off some hypothetical dataset containing customer reviews alongside associated product IDs: ```python import torch from torch import nn class HierarchicalEmbedder(nn.Module): def __init__(self, vocab_size, embed_dim=100): super().__init__() self.embedding = nn.Embedding(vocab_size, embed_dim) def forward(self, x): return self.embedding(x) # Example usage: vocab_size = 5000 # Number of unique words/products embeddings_model = HierarchicalEmbedder(vocab_size) input_tensor = torch.LongTensor([i for i in range(10)]) # Simulated input indices output_embeddings = embeddings_model(input_tensor) print(output_embeddings.shape) # Should output something similar to "torch.Size([10, 100])" ``` This script initializes a simple PyTorch module designed to generate fixed-size vector outputs corresponding to given integer keys representing either textual tokens found within review texts or numeric identifiers assigned uniquely per catalog entry.
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