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Bibliometrics & citations, view options, recommendations, multi-agent reinforcement learning by the actor-critic model with an attention interface.
Multi-agent reinforcement learning algorithms have achieved satisfactory performances in various scenarios, but many of them encounter difficulties in partially observable environments. In partially observable environments, the ...
Multi-agent systems (MAS) try to formulate dynamic world which surround human being in every aspect of his life. One of the important challenges encountered in multiagent systems is the credit assignment problem, simply means distributing the result of ...
Multi-agent reinforcement learning (MARL) requires coordination to efficiently solve certain tasks. Fully centralized control is often infeasible in such domains due to the size of joint action spaces. Coordination graph based formalization allows ...
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Motivated by the rapid development of autonomous vehicle technology, this work focuses on the challenges of introducing them in ride-hailing platforms with conventional strategic human drivers. We consider a ride-hailing platform that operates a mixed fleet of autonomous vehicles (AVs) and conventional vehicles (CVs), where AVs are fully controlled by the platform and CVs are operated by self-interested human drivers. Each vehicle is modelled as a Markov Decision Process that maximizes long-run average reward by choosing its repositioning actions. The behavior of the CVs corresponds to a large game where agents interact through resource constraints that result in queuing delays. In our fluid model, drivers may wait in queues in the different regions when the supply of drivers tends to exceed the service demand by customers. Our primary objective is to optimize the mixed AV-CV system so that the total profit of the platform generated by AVs and CVs is maximized. To achieve that, we formulate this problem as a bi-level optimization problem OPT where the platform moves first by controlling the actions of the AVs and the demand revealed to CVs, and then the CVs react to the revealed demand by forming an equilibrium that can be characterized by the solution of a convex optimization problem. We prove several interesting structural properties of the optimal solution and analyze simple heuristics such as AV-first where we solve for the optimal dispatch of AVs without taking into account the subsequent reaction of the CVs. We propose three numerical algorithms to solve OPT which is a non-convex problem in the platform decision parameters. We evaluate their performance and use them to show some interesting trends in the optimal AV-CV fleet dimensioning when supply is exogenous and endogenous.
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A search algorithm takes a problem as input and returns a sequence of actions as output. After the search phase, the agent has to carry out the actions that are recommended by the search algorithm ...
May 10, 2024. In artificial intelligence, a problem-solving agent refers to a type of intelligent agent designed to address and solve complex problems or tasks in its environment. These agents are a fundamental concept in AI and are used in various applications, from game-playing algorithms to robotics and decision-making systems.
Problem-solving agents decide what to do by finding sequences of actions that lead to desir-able states. We start by defining precisely the elements that constitute a "problem" and its "solution," and give several examples to illustrate these definitions. We then describe sev-eral general-purpose search algorithms that can be used to ...
The problem-solving agent performs precisely by defining problems and several solutions. So we can say that problem solving is a part of artificial intelligence that encompasses a number of techniques such as a tree, B-tree, heuristic algorithms to solve a problem. We can also say that a problem-solving agent is a result-driven agent and always ...
CPE/CSC 580-S06 Artificial Intelligence - Intelligent Agents the path data type problem components: Initial-State, Operators, Goal-Test, Path-Cost solution path from the initial state to a state that satisfies the goal test search algorithm takes the problem data type and computes a solution basis for a formal treatment Franz J. Kurfess ...
Problem formulation ♦ Example problems ♦ Basic search algorithms Chapter 3 2 Problem-solving agents Restricted form of general agent: function Simple-Problem-Solving-Agent (percept) returns an action static: seq, an action sequence, initially empty state, some description of the current world state goal, a goal, initially null problem, a ...
♦Problem-solving agents ♦Problem types ♦Problem formulation ♦Example problems ♦Basic search algorithms Chapter3 2 Problem-solving agents functionSimple-Problem-Solving-Agent(percept) returnsan action static: seq, an action sequence, initially empty state, some description of the current world state goal, a goal, initially null problem ...
The problem solving agent follows this four phase problem solving process: Goal Formulation: This is the first and most basic phase in problem solving. It arranges specific steps to establish a target/goal that demands some activity to reach it. AI agents are now used to formulate goals. Problem Formulation: It is one of the fundamental steps ...
Problem Solving and Search Problem Solving • Agent knows world dynamics • World state is finite, small enough to enumerate • World is deterministic • Utility for a sequence of states is a sum over path The utility for sequences of states is a sum over the path of the utilities of the individual states.
Problem-Solving Agents [2]: Specification Operational Requirements Search algorithm to find path • Objective criterion: minimum cost (this and next 3 lectures) Environment • Agent can search in environment according to specifications • Sometimes has full state and action descriptors; sometimes not!
Chapter 3 Solving Problems by Searching . When the correct action to take is not immediately obvious, an agent may need to plan ahead: to consider a sequence of actions that form a path to a goal state. Such an agent is called a problem-solving agent, and the computational process it undertakes is called search.. Problem-solving agents use atomic representations, that is, states of the world ...
Search - Determine the possible sequence of actions that lead to the states of known values and then choose the best sequence. - Search algorithms - input is a problem, output is a solution (action sequence) Execute - Given the solution, perform the actions. Problem Solving Agent - Special type of goal based agent.
function creates new nodes, parent, action. = 6g = 6lling in the various using the SuccessorFn elds and of the problem to create the correspondi. function Tree-Search( problem, fringe) returns a solution, or failure fringe Insert(Make-Node(Initial-State[problem]), fringe) loop do if fringe is empty then return failure.
Problem-solving agents consider each states of the world as indivisible, with no internal structure of the states visible to the problem-solving algorithms. Planning agents split up each state ...
Uniform-Cost Search. Each arc has some cost c ≥ ε > 0 The cost of the path to each node N is g(N) = Σ costs of arcs The goal is to generate a solution path of minimal cost The nodes N in the queue FRINGE are sorted in. increasing g(N) A S. 0. 1 10. S 5 B 5 G A B C. 1 5 15. 15 C 5.
By applying these algorithms, problem-solving agents can efficiently navigate through complex problem spaces and find optimal solutions. Uniform-Cost Search. In the field of artificial intelligence, problem-solving agents are designed to find optimal solutions to given problems. One common approach is the use of search algorithms to explore the ...
Problem-solving agents are a type of artificial intelligence that helps automate problem-solving. They can be used to solve problems in natural language, algebra, calculus, statistics, and machine learning. There are three types of problem-solving agents: propositional, predicate, and automata. Propositional problem-solving agents can ...
Problem formulation: define a representation for states define legal actions and transition functions. Search: find a solution by means of a search process. solutions are sequences of actions. Execution: given the solution, perform the actions. =) Problem-solving agents are (a kind of) goal-based agents.
Problem solving agents • An agent with several immediate options of unknown value can decide what to do by first examining different possible sequences of actions that lead to states of known value, and then choosing the best sequence • Looking for such a sequence is called search • A search algorithm takes a problem as input and returns a
Prerequisite: Wumpus World in Artificial Intelligence To create a hybrid agent for the wumpus world, the capacity to deduce various aspects of the state of the world may be integrated rather simply with the condition-action rules and problem-solving algorithms. The agent program keeps a knowledge base and a current strategy up to date. The ...
Problem-solving agents use atomic representations, as described in Section 2.4.7—that is, states of the world are considered as wholes, with no internal structure visible to the problem-solving algorithms. Goal-based agents that use more advanced factored or structured rep-resentations are usually called planning agentsand are discussed in ...
S 4700: Foundations of Artifici. eBart SelmanProblem Solving by Search R&N: Chapter 3Search is a central topic in AI.Int. oductionOriginated with Newell and Simon's. work on problem solving; Human Problem Solving (1972).Automated reasoning is a natural search task.More recently: Given that almost all AI formalisms (planning, learning, etc ...
Problem-solving agents: In Artificial Intelligence, Search techniques are universal problem-solving methods. Rational agents or Problem-solving agents in AI mostly used these search strategies or algorithms to solve a specific problem and provide the best result. Problem-solving agents are the goal-based agents and use atomic representation.
RevAP: : A bankruptcy-based algorithm to solve the multi-agent credit assignment problem in task start threshold-based multi-agent systems. Authors: Hossein Yarahmadi, ... In this study aimed at solving the Multi-agent Credit Assignment (MCA) problem, we introduce the Task Start Threshold (TST) of agents as a new constraint in a multi-score ...
To solve this bi-objective problem, a customized solution method which builds on and extends the non-dominated sorting genetic algorithm is developed. The implementation of the model with the solution method is demonstrated in a case study of package delivery to the north suburbs of the Chicago metro region.
We prove several interesting structural properties of the optimal solution and analyze simple heuristics such as AV-first where we solve for the optimal dispatch of AVs without taking into account the subsequent reaction of the CVs. We propose three numerical algorithms to solve OPT which is a non-convex problem in the platform decision parameters.