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MIT Team Develops Superior Technique for Training AI Models

Teaching an artificial intelligence system to make meaningful decisions is not easy. Reinforcement learning models, which support these systems, sometimes fail when faced with minor variations in tasks they’ve been trained to carry out. To improve the reliability of these models for complicated tasks, researchers at MIT have developed a better algorithm to train them.

The algorithm has been designed to choose the best tasks to train an artificial intelligence agent on so it can perform every task effectively.

For their technique, the researchers selected some tasks then independently trained an algorithm for every task. They chose tasks that would improve the overall performance of the algorithm on all tasks based on an algorithm dubbed Model-Based Transfer Learning.

This algorithm demonstrates how well every algorithm would perform if it was independently trained for a single task as well as how the performance of every algorithm would diminish if its tasks were changed. This allowed model-based transfer learning to estimate the value of training on new tasks.

The researchers then used zero-shot transfer learning to gauge how well the model performed in new tasks without any additional training. Once this was done, they tested their method on simulated tasks, which included managing speed advisories in real-time and controlling traffic signals.

They discovered that their method was five to fifty times more efficient than standard techniques on various simulated tasks. This improvement in efficiency allows the algorithm to learn better solutions in a timely manner, ultimately enhancing the AI agent’s performance.

Prof. Cathy Wu, the senior author of the study, explained that an algorithm that wasn’t complex stood a better chance of adoption as it was easier for others to understand and easier to implement. Wu is also a member of the Laboratory for Information and Decision Systems.

The researchers now plan to design model-based transfer learning algorithms that can be used to handle more complex issues. This is in addition to applying their approach to real-world issues, particularly in next-gen mobility systems.

The lead author of the study is CEE graduate student, Jung-Hoon Cho. Other researchers involved include IDSS graduate student Sirui Li; and Vindula Jayawardana, a graduate student in the Electrical Engineering and Computer Science department. Their findings will be presented at the Conference on Neural Information Processing Systems.

The study was partly funded by an Amazon Robotics PhD Fellowship, the Kwanjeong Educational Foundation PhD Scholarship Program, and a National Science Foundation CAREER Award.

With many companies like Intel Corp. (NASDAQ: INTC) also engaged in the development of AI solutions to different challenges, the world could soon see a lot more breakthrough approaches to handling existing problems.

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