Policy-based Methods
Policy-based methods are a class of reinforcement learning algorithms that directly learn a policy, which is a mapping from states to actions, without computing a value function. These methods optimize the policy by iteratively updating the parameters of a parameterized policy, such as a neural network, using gradient ascent. Policy-based methods are particularly useful in high-dimensional or continuous action spaces, where value-based methods may struggle to converge. They can also handle stochastic policies and can learn both deterministic and stochastic policies. Policy-based methods can be further categorized into on-policy and off-policy methods, depending on whether the policy being optimized is the same as the one used to generate the data. On-policy methods, such as REINFORCE and Actor-Critic, update the policy using the current data, while off-policy methods, such as Q-learning and Deep Deterministic Policy Gradient (DDPG), use a different policy, such as an epsilon-greedy policy, to generate the data.
Your Previous Searches
Random Picks
- Triples: In data science, triples refer to a fundamental data structure used in the semantic web and knowledge representation. A triple consists of three parts: a subject, a predicate, and an object. The subject is typically a resource or entity, th ... Read More >>
- Satellite-based Navigation System: A satellite-based navigation system is a technology that uses satellites to provide autonomous geo-spatial positioning with global coverage. It allows users to determine their exact location, speed, and time information anywhere on the eart ... Read More >>
- Scripting Languages: Scripting languages are programming languages that are used to automate the execution of tasks. They are typically interpreted rather than compiled, and are often used for tasks such as web development, system administration, and data analy ... Read More >>
Top News
Employees were already freaked out about AI — Amazon just proved them right...
Amazon CEO Andy Jassy acknowledged in a Tuesday statement what many workers have been scared of: Artificial intelligence will soon mean job cuts....
News Source: Business Insider on 2025-06-18
Trump’s purges come for the U.S.’ nuclear safety board...
Donald Trump’s efforts to strip federal agencies and commissions of their independence took an alarming step Monday, when the president fired one of the five commissioners who sit on the Nuclear Reg...
News Source: MSNBC on 2025-06-17
Amazon says it will reduce its workforce as AI replaces human employees | CNN Bu...
Amazon says it will reduce its workforce as AI replaces human employees | CNN Businesscnn.com...
News Source: CNN on 2025-06-17
Amazon’s Jassy says AI will reduce company’s corporate ranks...
Andy Jassy expects the company’s workforce to decline in the next few years....
News Source: Fortune on 2025-06-17
Bank of America is bullish on these 4 under-the-radar AI stocks...
Investors interested in the AI trade beyond the Magnificent Seven should look into these four stocks with breakout growth potential....
News Source: Business Insider on 2025-06-17