Freaks City

Model Overview BERT (Bidirectional Encoder Representations from Transformers) is a language model developed by Google that uses Transformer encoder architecture with bidirectional context processing. Unlike traditional recurrent networks, BERT processes input sequences in both directions simultaneously, enabling comprehensive contextual underst ...

Hybrid Attention Transformer (HAT) Paper HAT: Hybrid Attention Transformer for Image Restoration Architecture Overview The HAT model consists of three main components: shallow feature extraction, deep feature extraction, and image reconstruction. Algorithm Principle The HAT approach integrates channel attention and window-based self-attention m ...

Model Structure The basic unit consists of token embedding with positional encoding, encoder, and decoder. Encoder: Self-attention layer with skip connections and layer normalization, followed by a feed-forward network (FFN) with skip connections and layer normalization. Decoder: Self-attention layer with skip connections and layer normalizati ...

Attention Mechanisms Multi-Head Attention The attention mechanism computes: The scaling factor \(\sqrt{d_k}\) prevents large inner product values that could cause gradient instability. Assuming Q and K elements have mean 0 and variance \(\sigma^2\), the variance of \(QK^T\) grows with \(d_k\). Scaling by \(\sqrt{d_k}\) maintains stable varianc ...

Attention Mechanisms and Transformers The attention mechanism addresses a fundamental challenge in deep learning: transforming variable-dimensional inputs into fixed-dimensional outputs through a weighted aggregation process. This capability proves essential when dealing with sequences or sets of varying sizes, where traditional fixed-parameter ...

MobileFormer introduces a novel architecture that synergistically combines the strengths of convolutional neural networks (CNNs) and Transformers to achieve high efficiency with minimal computational overhead. By leveraging a lightweight bidirectional bridge between a mobile backbone and a compact Transformer, it enables effective exchange of l ...