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Home»Science»Breakthrough Algorithm Empowers Neural Networks to Continuously Learn and Adapt
Science

Breakthrough Algorithm Empowers Neural Networks to Continuously Learn and Adapt

October 10, 2024No Comments5 Mins Read
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Researchers at Caltech have developed an innovative algorithm, inspired by the flexibility of the human brain, that enables neural networks to continuously learn new tasks without forgetting previous knowledge. This breakthrough, known as the Functionally Invariant Path (FIP) algorithm, has wide-ranging applications from improving online recommendations to fine-tuning self-driving cars. The algorithm’s ability to overcome ‘catastrophic forgetting’ in AI systems represents a significant step forward in the quest for more adaptable and robust machine learning models. Neural networks and artificial intelligence are poised to transform various industries, and this innovation could pave the way for more flexible and responsive AI solutions.

New algorithm enables neural networks to learn continuously
Differential geometric framework for constructing FIPs in weight space. a, Left: conventional training on a task finds a single trained network (wt) solution. Right: the FIP strategy discovers a submanifold of isoperformance networks (w1, w2…wN) for a task of interest, enabling the efficient search for networks endowed with adversarial robustness (w2), sparse networks with high task performance (w3) and for learning multiple tasks without forgetting (w4). b, Top: a trained CNN with weight configuration (wt), represented by lines connecting different layers of the network, accepts an input image x and produces a ten-element output vector, f(x, wt). Bottom: perturbation of network weights by dw results in a new network with weight configuration wt + dw with an altered output vector, f(x, wt + dw), for the same input, x. c, The FIP algorithm identifies weight perturbations θ* that minimize the distance moved in output space and maximize alignment with the gradient of a secondary objective function (∇wL). The light-blue arrow indicates an ϵ-norm weight perturbation that minimizes distance moved in output space and the dark-blue arrow indicates an ϵ-norm weight perturbation that maximizes alignment with the gradient of the objective function, L(x, w). The secondary objective function L(x, w) is varied to solve distinct machine learning challenges. d, Path sampling algorithm defines FIPs, γ(t), through the iterative identification of ϵ-norm perturbations (θ*(t)) in the weight space. Credit: Nature Machine Intelligence (2024). DOI: 10.1038/s42256-024-00902-x

Defeating The Curse of Catastrophic Forgetting

Neural networks can learn to do things such as recognise hand written digits, astonishing feats of which no previous computer is capable. However, these models often suffer from what is referred to as ‘catastrophic forgetting’, where they forget how to perform old tasks after being trained on new ones. The flexibility as seen in the brains of humans, and also most animals within artificial neural networks that can only learn how to do a specific task or activity very well.

Citing neuroscience work on the brain’s re-wiring ability to learn new skills after injury, the Caltech team set about designing an algorithm that would allow a neural network to remember what it has already learned as it learns more. The end product is the Functionally Invariant Path (FIP) algorithm, a breakthrough technology which could revolutionize machine learning and artificial intelligence as we know it.

Abstract Bridging the Gap Between Artificial and Biological Neural Networks

The FIP algorithm was created by a team of Caltech researchers, including Matt Thomson, assistant professor of computational biology and HMRI Investigator. They were inspired by the work of Carlos Lois, a Research Professor of Biology at Caltech who can train birds to relearn prior communicative behavior.

Humans, too, have shown remarkable power to create neural rerouting around everyday tasks they find new ways of performing after stroke-induced brain damage. To allow neural networks to be updated with new data without forgetting old stimuli, the FIP algorithm was created to have this same flexibility. But the researchers manage to do so by using a mathematical technique they call differential geometry, which provides a way of modifying neural networks without bringing about catastrophic forgetting.

Application of the FIP Algorithm

The relevance of the FIP algorithm reaches much more than just academic purposes. The team that included former graduate student Guru Raghavan, Ph. Although the new technology is still in its early stages of development, Sherif Elsayed-Ali, Ph.

Example of such usage might be enhancement of recommendation engine in an online store. Since they rely on learning from the behavior of users, and understand that this behavior will inevitably change over time, the recommendations can become more personalized and relevant as their underlying neural networks continue to learn again without a fundamental system redesign.

Another exciting use is fine-tuning self-driving car systems. If an autonomous vehicle finds itself in a new environment with slightly different rules of the road, the FIP algorithm allows it to adapt and learn without tinkering the self-driving tech that enabled it to read traffic signals or handle complex intersections.StretchImage Newsienceshoot synd/ap/exutterstock

Guided by Caltech Entrepreneur In Residence Julie Schoenfeld, Raghavan and Thomson have co-founded a company called Yurts to continue the expansion of the FIP algorithm and bring machine learning systems to the masses. The company is focused on democratizing this revolutionary technology across a range of industries, ushering in the era of flexible and robust artificial intelligence.

adaptive algorithms adaptive systems Artificial intelligence artificial neural networks brain flexibility catastrophic forgetting machine learning analysis
jeffbinu
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Tech enthusiast by profession, passionate blogger by choice. When I'm not immersed in the world of technology, you'll find me crafting and sharing content on this blog. Here, I explore my diverse interests and insights, turning my free time into an opportunity to connect with like-minded readers.

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