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https://dagshub.com/wp-content/uploads/2023/05/simon-lee-WK5uLckIjRo-unsplash-300x169.png 300w, https://dagshub.com/wp-content/uploads/2023/05/simon-lee-WK5uLckIjRo-unsplash-1024x576.png 1024w, https://dagshub.com/wp-content/uploads/2023/05/simon-lee-WK5uLckIjRo-unsplash-768x432.png 768w" sizes="(max-width: 1920px) 100vw, 1920px" /> <div class="b-block-single__head-image-author"> <p>Photo by <a href="https://unsplash.com/@simonppt?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText">SIMON LEE</a> on <a href="https://unsplash.com/photos/OdnXv9hJOEI?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText">Unsplash</a></p> </div> </header> <div class="c-article-primary__container"> <div class="c-article-primary__meta"> <div class="container container--medium-one"> <div class="c-breadcrumbs"> <p class="breadcrumbs"><span><span><a href="https://dagshub.com/glossary/">Glossary</a></span> 禄 <span class="breadcrumb_last" aria-current="page">Neural Architecture Search</span></span></p></div> <h4 class="c-article-primary__tagline">Dagshub Glossary</h4> <h1 class="c-article-primary__title">Neural Architecture Search</h1> </div> </div> <div class="c-article-primary__body"> <div class="container container--medium-one"> <div class="c-article-primary__content"> <h1 class="wp-block-heading"><strong>What is Neural Architecture Search</strong></h1> <p>At the heart of machine learning innovation lies Neural Architecture Search (NAS), a specialized branch dedicated to the automated crafting of artificial neural networks. This field revolutionizes the traditional, labor-intensive method of manually constructing neural network frameworks. NAS employs advanced machine learning strategies to streamline this process, leading to the discovery of network architectures that surpass manually created designs in performance.</p> <p>Neural Architecture Search stands as a pivotal element in the evolution of deep learning models. Its role? To autonomously determine the most effective architecture for a neural network, tailored to the specific task it needs to address. The term ‘architecture’ in this context refers to the specific organization of neurons and their interconnections within the network, a factor that profoundly influences the efficiency and effectiveness of the model.</p> <h2 class="wp-block-heading"><strong>History of Neural Architecture Search</strong></h2> <p>The concept of Neural Architecture Search was first introduced in 2017 by researchers at Google Brain. They proposed a method to automate the design of neural network architectures using reinforcement learning. The idea was to train a controller to generate a string that represents a neural network architecture. This controller was trained with a reward signal from the validation accuracy of the developed architectures.</p> <p>Since then, the field has rapidly evolved, with many different methods being proposed. These methods vary in the search space they explore, their search strategy, and their performance estimation strategy. All these methods aim to find a neural network architecture that optimizes a given objective function, typically the validation accuracy on a given dataset.</p> <h3 class="wp-block-heading">Evolution of NAS Methods</h3> <p>In the evolving landscape of Neural Architecture Search (NAS), the foundational work of Google Brain has paved the way for a myriad of diverse NAS methodologies. Some adhere to the reinforcement learning approach of the prototype, while others branch out, exploring territories like evolutionary algorithms, Bayesian optimization, and gradient-based tactics. Each harbors its own set of strengths and weaknesses, tailored to the nuanced demands of specific tasks.</p> <p>A pressing hurdle in the realm of NAS is the sheer volume of computational resources required. Google Brain’s pioneering NAS approach gobbled up thousands of GPU hours in its quest for an optimal architecture. To combat this, a surge of efficient NAS techniques has emerged. These avant-garde strategies seek to slash computational demands through innovative means such as weight sharing, the implementation of early stopping, and the utilization of learning curve prognostication.</p> <h2 class="wp-block-heading"><strong>How Neural Architecture Search Works</strong></h2> <p>Neural Architecture Search works by automating finding the best architecture for a neural network. This process involves defining a search space, choosing a search strategy, and estimating the performance of different architectures.</p> <p>The search space defines the set of possible architectures that can be considered. This can include different types of layers (e.g., convolutional, recurrent, fully connected), different numbers of layers, other units in each layer, and different kinds of connections between layers. The search strategy is the method used to explore the search space. This can be a random search, a grid search, a gradient-based method, a reinforcement learning method, an evolutionary algorithm, or any other method that can be used to explore a search space.</p> <h3 class="wp-block-heading">Performance Estimation</h3> <p>The performance of different architectures is estimated using a performance estimation strategy. This involves training and validating each architecture on a given dataset and using the validation accuracy as a performance measure. The goal is to find the architecture that achieves the highest validation accuracy.</p> <p>Training and validating each architecture can be computationally expensive. Therefore, several methods have been proposed to estimate the performance of an architecture without fully training it. These methods include weight sharing, early stopping, and learning curve prediction.</p> <h2 class="wp-block-heading"><strong>Use Cases of Neural Architecture Search</strong></h2> <p>Neural Architecture Search can be used in any task that involves the use of neural networks. This includes image classification, object detection, semantic segmentation, speech recognition, natural language processing, and many others. NAS can automate the process of designing neural networks for these tasks, potentially leading to better performance and saving time and resources.</p> <p>For example, in image classification, NAS can be used to find the best architecture for a convolutional neural network. This can involve choosing the types and numbers of layers, the number of units in each layer, and the types of connections between layers. Similarly, in natural language processing, NAS can be used to find the best architecture for a recurrent neural network or a transformer network.</p> <h2 class="wp-block-heading"><strong>Benefits of Neural Architecture Search</strong></h2> <p>One of the main benefits of Neural Architecture Search is that it can lead to better performance than manual design. By exploring a large search space of possible architectures, NAS can discover ones that a human designer might need to consider. These architectures can often perform better than hand-designed ones, especially on large and complex tasks.</p> <p>Designing a neural network architecture manually can be a time-consuming and complex task, especially for large and complex networks. NAS can automate this process, freeing up time for other tasks.</p> <h2 class="wp-block-heading"><strong>Applications of Neural Architecture Search</strong></h2> <p>Neural Architecture Search has been successfully applied in many areas of machine learning. In image classification, NAS has been used to discover architectures that achieve state-of-the-art performance on benchmark datasets such as ImageNet. In natural language processing, NAS has been used to discover architectures for tasks such as language modeling and machine translation.</p> <p>NAS has also been used in other areas, such as reinforcement learning, where it has been used to discover architectures for deep reinforcement learning algorithms. Furthermore, NAS has been used in designing hardware for neural networks, where it has been used to find architectures that are efficient in computation and power consumption.</p> <div class="c-list-tags c-list-tags--alt"> <h3 class="c-list-tags__title">Related terms</h3> <ul class="c-list-tags__list"> <li class="c-list-tags__item"> <a class="c-list-tags__link" href="https://dagshub.com/glossary/convolutional-neural-network/"> Convolutional Neural Network </a> </li> <li class="c-list-tags__item"> <a class="c-list-tags__link" href="https://dagshub.com/glossary/feature-store/"> Feature Store </a> </li> <li class="c-list-tags__item"> <a class="c-list-tags__link" href="https://dagshub.com/glossary/holdout-set/"> Holdout Set </a> </li> </ul> </div> </div> </div> </div> </div> </article> </main> <a href="#page" class="c-arrow-top"><div class="c-arrow-top__tooltip">Back to top</div><svg width="36" height="36" viewBox="0 0 36 36" fill="none" xmlns="http://www.w3.org/2000/svg"><rect width="36" height="36" rx="12" fill="#E2E8F0"/><path fill-rule="evenodd" clip-rule="evenodd" d="M17.5286 13.5286C17.7889 13.2683 18.2111 13.2683 18.4714 13.5286L21.8047 16.862C22.0651 17.1223 22.0651 17.5444 21.8047 17.8048C21.5444 18.0651 21.1223 18.0651 20.8619 17.8048L18.6667 15.6095V22C18.6667 22.3682 18.3682 22.6667 18 22.6667C17.6318 22.6667 17.3333 22.3682 17.3333 22V15.6095L15.1381 17.8048C14.8777 18.0651 14.4556 18.0651 14.1953 17.8048C13.9349 17.5444 13.9349 17.1223 14.1953 16.862L17.5286 13.5286Z" fill="#172D32"/></svg></a> </div> <div class="site-pre-footer"> <div class="container"> <div class="content-wrapper"> <h3 class="title"> Manage your unstructured data. 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