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人工智能代写 | COMP 4106 – Artificial Intelligence

这个作业是实现一些简单的学习自动机(LA)和强化学习(RL)策略
COMP 4106 – Artificial Intelligence
Winter 2020
Assignment #3
Due date: March 30, 2020
Assignment Involving Elementary Reinforcement Learning
Introduction
The goal of this assignment is to have you implement some simple Learning Automata (LA)
and Reinforcement Learning (RL) strategies. The application domain is quite straightforward,
but it is typical of the domains where LA and RL can be used.
Problem Statement
The assignment consists of using LA to solve a simplified version of the Elevator Problem. A
building has an elevator that stops at k floors as in Figure 1. People can request the elevator
from floor i, and get off the elevator on floor j, where i = 1 : : : k; i 6= j. At any time instant, the
probability that the elevator is requested from a floor, and the probability that the person gets
off the elevator on another floor, are given by the matrices E and L respectively (not shown),
whose components are the probabilities of a person entering and leaving the floors respectively.
After each trip, the elevator can move to rest at one of the k different floors so as to minimize
the waiting time for the next passenger.
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&ůŽŽƌ< ͙ &ůŽŽƌϮ &ůŽŽƌϭ Figure 1: A simple model of an Elevator system, where the car can be made to wait at one of k possible floors. The distributions E and L for are unknown to the LA/RL scheme. However, the unknown waiting can be quantified as follows. Every index i 2 f1; 2; :::; kg is mapped to a unique number G(i) 2 f1; 2; :::; kg by a one-to-one and onto mapping. In this assignment, you can assume that k = 6. Then, the waiting time fi (which is unknown to the LA/RL system) obeys the equation: fi = 0:8  G(i) + 0:4  CEIL[ G(i) 2 ℄ + h; i = f1; 2; :::; 6g; where the random random times are affected by a noise, h, that has a Gaussian distribution with a mean of 0 and a variance of an input parameter, 2 , and where CEIL[℄ is the “Ceiling” function of the argument. In other words, at any time t, h is a random number generated from a Gaussian distribution that represents the random delays at the respective floors. In this assignment, you can use a Gaussian Random Number Generator from a standard existing library available in the language that you are using. 2 Assignment Objectives These are the tasks you have to do:  Learn the best floor for the car to be waiting using the Tsetlin, Krinsky, Krylov and LRI schemes.  In each case, use a suitable value for the “memory” and learning parameter.  In each case, plot the ensemble average of the waiting time for an ensemble of 100 experiments. Questions During the demo you should be prepared to discuss the following questions:  Explain the way you chose the parameters for each scheme.  Can you rank the schemes in terms of their speed/accuracy? 3


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