Reinforcement learning agents or AI thats progressively spurred toward goals via rewards (or punishments) form the foundation of self-driving cars, dexterous robots, and drug discovery systems. But because theyre predisposed to explore unfamiliar states, theyre susceptible to whats called the safe exploration problem, wherein they become fixated on unsafe states (like a mobile robot driving into a ditch, say).
Thats why researchers at Alphabets DeepMind investigated in a paper a method for reward modeling that operates in two phases and is applicable to environments in which agents dont know where unsafe states might be. The researchers say their approach not only successfully trains a reward model to detect unsafe states without visiting them, it can correct reward hacking (loopholes in the reward specification) before the agent is deployed even in new and unfamiliar environments.
Interestingly, their work comes shortly after the release of San Francisco-based research firm OpenAIs Safety Gym, a suite of tools for developing AI that respects safety constraints while training and that compares its safety to the extent it avoids mistakes while learning. Safety Gym similarly targets reinforcement learning agents with constrained reinforcement learning, a paradigm that requires AI systems to make trade-offs to achieve defined outcomes.
The DeepMind teams approach encourages agents to explore a range of states through hypothetical behaviors generated by two systems: a generative model of initial states and a forward dynamics model, both trained on data like random trajectories or safe expert demonstrations. A human supervisor labels the behaviors with rewards, and the agents interactively learn policies to maximize their rewards. Only after the agents have successfully learned to predict rewards and unsafe states are they deployed to perform desired tasks.
Above: DeepMinds safe reinforcement learning approach tested on OpenAI Gym, an environment for AI benchmarking and training.
Image Credit: DeepMind
As the researchers point out, the key idea is the active synthesis of hypothetical behaviors from scratch to make them as informative as possible, without interacting with the environment directly. The DeepMind team calls it reward query synthesis via trajectory optimization, or ReQueST, and explains that it generates four types of hypothetical behaviors in total. The first type maximizes the uncertainty of an ensemble of reward models, while the second and third maximize the predicted rewards (to elicit labels for behaviors with the highest information value) and minimize predicted rewards (to surface behaviors for which the reward model might be incorrectly predicting). As for the fourth category of behavior, it maximizes the novelty of trajectories so as to encourage exploration regardless of predicted rewards.
Finally, once the reward model reaches a satisfactory state, a planning-based agent is deployed one that leverages model-predictive control (MPC) to pick actions optimized for the learned rewards. Unlike model-free reinforcement learning algorithms that learn through trial and error, this MPC enables agents to avoid unsafe states by using the dynamics model to anticipate actions consequences.
To our knowledge, ReQueST is the first reward modeling algorithm that safely learns about unsafe states and scales to training neural network reward models in environments with high-dimensional, continuous states, wrote the coauthors of the study. So far, we have only demonstrated the effectiveness of ReQueST in simulated domains with relatively simple dynamics. One direction for future work is to test ReQueST in 3D domains with more realistic physics and other agents acting in the environment.
Continue reading here:
DeepMind proposes novel way to train safe reinforcement learning AI - VentureBeat
- Chinese national arrested and charged with stealing AI trade secrets from Google - NPR - March 8th, 2024 [March 8th, 2024]
- President Biden Calls for Ban on AI Voice Impersonations During State of the Union - Variety - March 8th, 2024 [March 8th, 2024]
- Revolutionize Your Business with AWS Generative AI Competency Partners | Amazon Web Services - AWS Blog - March 8th, 2024 [March 8th, 2024]
- Broadcom Expects AI Demand to Help Offset Weakness Elsewhere - Yahoo Finance - March 8th, 2024 [March 8th, 2024]
- Micron Hits Record High With Analysts Calling It an 'Under-Appreciated AI Beneficiary' - Investopedia - March 8th, 2024 [March 8th, 2024]
- The Adams administration quietly hired its first AI czar. Who is he? - City & State New York - March 8th, 2024 [March 8th, 2024]
- AI likely to increase energy use and accelerate climate misinformation report - The Guardian - March 8th, 2024 [March 8th, 2024]
- This Artificial Intelligence (AI) Stock Could Double, and It Is Way Cheaper Than Nvidia - Yahoo Finance - March 8th, 2024 [March 8th, 2024]
- Fake images made to show Trump with Black supporters highlight concerns around AI and elections - The Associated Press - March 8th, 2024 [March 8th, 2024]
- Artificial intelligence and illusions of understanding in scientific research - Nature.com - March 8th, 2024 [March 8th, 2024]
- Analysis | House AI task force leaders take long view on regulating the tools - The Washington Post - March 8th, 2024 [March 8th, 2024]
- Don't Give Your Business Data to AI Companies - Dark Reading - March 8th, 2024 [March 8th, 2024]
- NIST, the lab at the center of Bidens AI safety push, is decaying - The Washington Post - March 8th, 2024 [March 8th, 2024]
- Essay | AI is Coming! Tips for Staying Calm and Carrying On - The Wall Street Journal - March 8th, 2024 [March 8th, 2024]
- AI can be easily used to make fake election photos - report - BBC.com - March 8th, 2024 [March 8th, 2024]
- 5 Artificial Intelligence (AI) Stocks That Could Make You a Millionaire - Yahoo Finance - March 8th, 2024 [March 8th, 2024]
- AI could be an extraordinary force for good. So why do our politicians still not have a plan? - The Guardian - March 8th, 2024 [March 8th, 2024]
- Mapping Disease Trajectories from Birth to Death with AI - Neuroscience News - March 8th, 2024 [March 8th, 2024]
- India plans 10,000-GPU sovereign AI supercomputer - The Register - March 8th, 2024 [March 8th, 2024]
- SAP enhances Datasphere and SAC for AI-driven transformation - CIO - March 8th, 2024 [March 8th, 2024]
- Jim Cramer names companies and sectors poised to rally on the AI wave - CNBC - March 8th, 2024 [March 8th, 2024]
- The job applicants shut out by AI: The interviewer sounded like Siri - The Guardian - March 8th, 2024 [March 8th, 2024]
- Microsoft confirms Surface and Windows AI event for March 21st - The Verge - March 8th, 2024 [March 8th, 2024]
- Adobes new Express app brings Firefly AI tools to iOS and Android - The Verge - March 8th, 2024 [March 8th, 2024]
- A Google AI Watched 30,000 Hours of Video GamesNow It Makes Its Own - Singularity Hub - March 8th, 2024 [March 8th, 2024]
- Palantir CEO Karp on TITAN, AI Warfare Technology - Bloomberg - March 8th, 2024 [March 8th, 2024]
- Elliptic Curve Murmurations Found With AI Take Flight - Quanta Magazine - March 8th, 2024 [March 8th, 2024]
- 5 AI Stocks to Buy in March 2024, According to Analysts - TipRanks.com - TipRanks - March 8th, 2024 [March 8th, 2024]
- Wix's new AI chatbot builds websites in seconds based on prompts - The Verge - March 8th, 2024 [March 8th, 2024]
- Amid record high energy demand, America is running out of electricity - The Washington Post - March 8th, 2024 [March 8th, 2024]
- AI Crypto Tokens in 5 Minutes: What to Know and Where to Start - Inc. - February 26th, 2024 [February 26th, 2024]
- 'The Worlds I See' by AI visionary Fei-Fei Li '99 selected as Princeton Pre-read - Princeton University - February 26th, 2024 [February 26th, 2024]
- AI is having a 1995 moment, analyst says - Business Insider - February 26th, 2024 [February 26th, 2024]
- Vatican research group's book outlines AI's 'brave new world' - National Catholic Reporter - February 26th, 2024 [February 26th, 2024]
- Honor's Magic 6 Pro launches internationally with AI-powered eye tracking on the way - The Verge - February 26th, 2024 [February 26th, 2024]
- Google explains Gemini's embarrassing AI pictures of diverse Nazis - The Verge - February 26th, 2024 [February 26th, 2024]
- Google cut a deal with Reddit for AI training data - The Verge - February 26th, 2024 [February 26th, 2024]
- What's the point of Elon Musk's AI company? - The Verge - February 26th, 2024 [February 26th, 2024]
- AI agents like Rabbit aim to book your vacation and order your Uber - NPR - February 26th, 2024 [February 26th, 2024]
- Announcing Microsofts open automation framework to red team generative AI Systems - Microsoft - February 26th, 2024 [February 26th, 2024]
- After Nvidia's latest blowout, here are 20 AI stocks expected to rise as much as 44% - Yahoo Finance - February 26th, 2024 [February 26th, 2024]
- 1 Exceptional AI Chip Stock Investors Need to Know About in 2024 - The Motley Fool - February 26th, 2024 [February 26th, 2024]
- Nvidia briefly hits $2 trillion valuation as AI frenzy grips Wall Street - Reuters - February 26th, 2024 [February 26th, 2024]
- AI Chatbots Can Guess Your Personal Information From What You ... - WIRED - October 18th, 2023 [October 18th, 2023]
- Harvard IT Launches Pilot of AI Sandbox to Enable Walled-Off Use ... - Harvard Crimson - October 18th, 2023 [October 18th, 2023]
- Advancing policing through AI: Insights from the global law ... - Police News - October 18th, 2023 [October 18th, 2023]
- Hochul announces new SUNY, IBM investments in AI - Olean Times Herald - October 18th, 2023 [October 18th, 2023]
- Nvidia's banking on TensorRT to expand its generative AI dominance - The Verge - October 18th, 2023 [October 18th, 2023]
- AI expands from MRFs to vehicles - Plastics Recycling Update - October 18th, 2023 [October 18th, 2023]
- AI Reads Ancient Scroll Charred by Mount Vesuvius in Tech First - Scientific American - October 18th, 2023 [October 18th, 2023]
- A DEEPer (squared) dive into AI Harvard Gazette - Harvard Gazette - October 18th, 2023 [October 18th, 2023]
- Florida bar weighs whether lawyers using AI need client consent - Reuters - October 18th, 2023 [October 18th, 2023]
- Cognizant and Vianai Systems Announce Strategic Partnership to ... - PR Newswire - October 18th, 2023 [October 18th, 2023]
- How AI could speed up scientific discoveries, from proteins to ... - NPR - October 18th, 2023 [October 18th, 2023]
- AI challenge to deliver better healthcare | Western Australian ... - Government of Western Australia - October 18th, 2023 [October 18th, 2023]
- Henry Kissinger: The Path to AI Arms Control - Foreign Affairs Magazine - October 18th, 2023 [October 18th, 2023]
- Stability AI releases StableStudio in latest push for open-source AI - The Verge - May 18th, 2023 [May 18th, 2023]
- Google CEO Sundar Pichai Predicts That This Profession Will Be ... - The Motley Fool - May 18th, 2023 [May 18th, 2023]
- Frances privacy watchdog eyes protection against data scraping in AI action plan - TechCrunch - May 18th, 2023 [May 18th, 2023]
- Investing in Hippocratic AI - Andreessen Horowitz - May 18th, 2023 [May 18th, 2023]
- As Alphabet flexes its AI prowess, there's a 'new elephant in the room' for Google - MarketWatch - May 18th, 2023 [May 18th, 2023]
- The Boring Future of Generative AI | WIRED - WIRED - May 18th, 2023 [May 18th, 2023]
- OpenAI readies new open-source AI model, The Information reports - Reuters.com - May 18th, 2023 [May 18th, 2023]
- What every CEO should know about generative AI - McKinsey - May 18th, 2023 [May 18th, 2023]
- AI creates images of the 'perfect' man and woman - Sky News - May 18th, 2023 [May 18th, 2023]
- Audit AI search tools now, before they skew research - Nature.com - May 18th, 2023 [May 18th, 2023]
- 3 Reasons C3.ai Stock Could Be Your Golden Ticket to the AI ... - InvestorPlace - May 18th, 2023 [May 18th, 2023]
- Zoom makes a big bet on AI with investment in Anthropic - VentureBeat - May 18th, 2023 [May 18th, 2023]
- AI voice phone scams are on the rise. Here's how to avoid them - USA TODAY - May 18th, 2023 [May 18th, 2023]
- Amazon is building an AI-powered conversational experience for ... - The Verge - May 18th, 2023 [May 18th, 2023]
- AI speculators need to 'differentiate between actual spending and investment' and hype: Strategist - Yahoo Finance - May 18th, 2023 [May 18th, 2023]
- AI Can Be Both Accurate and Transparent - HBR.org Daily - May 18th, 2023 [May 18th, 2023]
- You're Probably Underestimating AI Chatbots | WIRED - WIRED - May 18th, 2023 [May 18th, 2023]
- AI presents political peril for 2024 with threat to mislead voters - The Associated Press - May 18th, 2023 [May 18th, 2023]
- We need AI to help us face the challenges of the future - The Guardian - May 18th, 2023 [May 18th, 2023]
- End Of Googles Dominance? Stock Gets Rare Analyst Downgrade Over AI Fears - Forbes - May 18th, 2023 [May 18th, 2023]
- Watch 44 million atoms simulated using AI and a supercomputer - New Scientist - May 18th, 2023 [May 18th, 2023]
- AI Is The New Electricity: Bank Of America Picks 20 Stocks To Cash In On ChatGPT Hype - Forbes - March 2nd, 2023 [March 2nd, 2023]
- Tech Giants Are Barreling Headfirst Into an AI Arms Race - February 20th, 2023 [February 20th, 2023]
- Bing's AI Is Threatening Users. That's No Laughing Matter - TIME - February 20th, 2023 [February 20th, 2023]