ETHZ/Intro Tim

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('''.:: System Explanation ::.''')
('''.:: Finite State Machine View on the System ::.''')
 
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=='''.:: System Explanation ::.'''==
 
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The proposed system is best described by a Mealy machine [http://en.wikipedia.org/wiki/Mealy_machine Mealy machine], a special type of [http://en.wikipedia.org/wiki/Finite_state_machine finite state machines] (FSM). Mealy machines are described by a 6-tuple, (''Q'', ''q''<sub>0</sub>, Σ, Λ, ''δ'', ''Ω''), with:
 
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* ''Q'' - a set of states, for the proposed system we use three different states (''q''<sub>0</sub> - not yet trained, ''q''<sub>1</sub> - trained to recognize chemical A,  ''q''<sub>2</sub> - trained to recognize chemical B)
 
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* ''q''<sub>0</sub> - a start state, here we assume we start in a state where the system is not yet trained
 
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* Σ = {AL, A, BL, B} - an input alphabet
 
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* Λ = {green, red, cyan, yellow, nothing} - an output alphabet
 
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* ''δ'' : ''Q'' × Σ → ''Q'' - a state transition function
 
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* ''Ω'' : ''Q'' × Σ → Λ - an output function
 
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In detail, the transition function ''δ'' and the output function ''Ω'' look as follows:
 
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{| class="wikitable" border="1" cellspacing="0" cellpadding="2" style="text-align:left; margin: 1em 1em 1em 0; background: #f9f9f9; border: 1px #aaa solid; border-collapse: collapse;"
 
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|-
 
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! inputs/states !! ''q''<sub>0</sub> !! ''q''<sub>1</sub> !! ''q''<sub>2</sub> !!
 
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! inputs/states !! ''q''<sub>0</sub> !! ''q''<sub>1</sub> !! ''q''<sub>2</sub>
 
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|-
 
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! AL            || ''q''<sub>1</sub> || ''q''<sub>1</sub> || ''q''<sub>1</sub> ||
 
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! AL            || nothing          ||  ||
 
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|-
 
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! A            || ''q''<sub>0</sub> || ''q''<sub>1</sub> || ''q''<sub>2</sub> ||
 
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! A            ||  || red              || cyan
 
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|-
 
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! BL            || ''q''<sub>2</sub> || ''q''<sub>2</sub> || ''q''<sub>2</sub> ||
 
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! BL            || nothing          ||  ||
 
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|-
 
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! B            || ''q''<sub>0</sub> || ''q''<sub>1</sub> || ''q''<sub>2</sub> ||
 
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! B            ||  || green        || yellow
 
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|-
 
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|}
 
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The resulting automaton is represented by Fig. 1.
 

Latest revision as of 12:04, 18 October 2007