# Difference between revisions of "Sarah Carratt 4.14.11"

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(New page: ==Overview== *dx/dt = production rate - degradation rate **degradation rate: amount a fraction of material beaks down in each unit time period **production rate: ***model factors: liner, M...) |
(→Matrix Games) |
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Line 9: | Line 9: | ||

==Matrix Games== | ==Matrix Games== | ||

*Recall our adjacency matrix A ('''transpose''' of YEASTRACT) | *Recall our adjacency matrix A ('''transpose''' of YEASTRACT) | ||

− | **1 if gene j affects gene i | + | **1 if gene j affects gene i |

**0 if not | **0 if not | ||

*there are scaling factors of weights and thresholds | *there are scaling factors of weights and thresholds |

## Latest revision as of 09:52, 14 April 2011

## Overview

- dx/dt = production rate - degradation rate
- degradation rate: amount a fraction of material beaks down in each unit time period
- production rate:
- model factors: liner, MM, sigmoid (smoothing out of on-off switch)
- S'(x) = 1/ (1+e
^{-x})- S(w(x-t))where w=scaling,t=threshold at on-off junction

## Matrix Games

- Recall our adjacency matrix A (
**transpose**of YEASTRACT)- 1 if gene j affects gene i
- 0 if not

- there are scaling factors of weights and thresholds
- affectee receives switching sights from affectors

## Difference between "1" and "1"

- if more turns on and less "turns off"...activation
- more turns off and less "turns on"...activation
- switch between by flipping sign on scalar