Abstract
This paper describes a decision model for an autonomous agent that provides an inhabitant with comfort based on information network technologies that connect home electric appliances with household equipment. The inhabitant enjoys the benefit of comfort, while he pays the cost for keeping that comfort. The autonomous agent should decide and control household equipment considering that cost from the inhabitant’s viewpoint. Thus, we utilized a representation scheme called an “influence diagram” that enabled us to model the decision-making process of the agent from the inhabitant’s point of view. First, decision modeling using the influence diagram is presented via an example. The presented model consists of three information-processing modules: a module for estimating the situation of an inhabitant based on information from home networks, a module for evaluating comfort of the inhabitant, and a module for making decisions that maximize the utility of the inhabitant from both the viewpoints of comfort and the cost paid for that comfort. Next, an experiment for verifying whether the presented model is effective or not, and its results are described. Finally, our model of the agent is discussed in relation to social intelligence design by investigating the interactive processes between the agent and the inhabitant.
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In this figure, a chance node containing an observable variable is drawn as a bold line, while a chance node containing an unobservable variable is drawn as a normal line.
The action state is manually discretized into three states. The working and still states are introduced for representing typical activity states of the inhabitant. These two states show an inhabitant exists, while the absent state shows he does not exist. The absent state is used for the agent to make a decision on turning off air conditioners from the viewpoint of energy conservation.
The motion sensor state is also discretizcd into these three states. This is based on the hypothesis that the frequent, sometimes and rare states are probably associated with working, still and absent states, respectively.
This simulation is done using the software of influence diagrams developed by Hugin Corporation.
In this experiment, the mode of agent control is set to the comfort mode.
As mentioned in Sect. 3.4.3, we consider three types: comfort, energy-saving or neutral.
This estimation process is done mentioned in Sect. 3.3.3.
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Nishiyama, T., Hibiya, S. & Sawaragi, T. Development of agent system based on decision model for creating an ambient space. AI & Soc 26, 247–259 (2011). https://doi.org/10.1007/s00146-010-0305-3
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DOI: https://doi.org/10.1007/s00146-010-0305-3