Differences
This shows you the differences between two versions of the page.
Next revision | Previous revisionLast revisionBoth sides next revision | ||
algorithmic_botany [2008-11-29 13:35] – created nik | algorithmic_botany [2009-03-05 17:52] – 81.188.78.24 | ||
---|---|---|---|
Line 15: | Line 15: | ||
There is a number of applications in which L systems plays an important role as a biological model: | There is a number of applications in which L systems plays an important role as a biological model: | ||
- | | + | - structural models of trees integrated in more complex forest ecosystem simulations, |
- | | + | - identifying plant response to insect attack, |
- | | + | - design of new varieties of plants, |
- | | + | - reconstruction of extinct plant species, |
- | | + | - crop yield prediction, |
- | | + | - classification of branching patterns in inflorescences, |
- | | + | - simulation of fungal growth, or |
- | | + | - computer aided learning for farm managers." |
via. Roberto S. Ferrero | via. Roberto S. Ferrero | ||
Line 32: | Line 32: | ||
====Stochastic L-systems ==== | ====Stochastic L-systems ==== | ||
* variations & randomness | * variations & randomness | ||
- | ==== Context-sensitive L-systems | + | |
+ | ==== Context-sensitive L-systems | ||
* symbol replacement dep. on context, or previous states | * symbol replacement dep. on context, or previous states | ||
* can be used to model signal propogation | * can be used to model signal propogation | ||
- | ==== Parametric L-systems | + | |
+ | ==== Parametric L-systems | ||
* elements can be parameterised, | * elements can be parameterised, | ||
* continous development, | * continous development, | ||
- | ==== Developmental models (ABOP 3.1 ->) | + | ==== Developmental models (ABOP 3.1 ->)==== |
* L-systems provide good structural models, how can we model growth and changes over time? | * L-systems provide good structural models, how can we model growth and changes over time? | ||
* multi-level models | * multi-level models | ||
Line 45: | Line 47: | ||
* complete l-system (geometric info, growth rates/ | * complete l-system (geometric info, growth rates/ | ||
* compound flowering structures (inflorescences) | * compound flowering structures (inflorescences) | ||
- | * Phyllotaxis. In order to describe the pattern of florets (or seeds) in a sunflower head, | + | * Phyllotaxis. In order to describe the pattern of florets (or seeds) in a sunflower head, Vogel proposed the formula φ=n∗137.5◦, |
- | Vogel proposed the formula φ=n∗137.5◦, | + | |
* surface models | * surface models | ||
* the shape as well as size of plant organs may change over time | * the shape as well as size of plant organs may change over time | ||
* leaf types | * leaf types | ||
+ | |||
====animation (ABOP 6)==== | ====animation (ABOP 6)==== | ||
* The original formalism of L-systems provides a model of development that is discrete both in time and space. | * The original formalism of L-systems provides a model of development that is discrete both in time and space. | ||
Line 57: | Line 59: | ||
* assign continuous attributes to model components | * assign continuous attributes to model components | ||
* model states are still known only in discrete time intervals. | * model states are still known only in discrete time intervals. | ||
- | ==== Timed DOL systems | + | ==== Timed DOL systems==== |
- | * expression of production rules is still discrete, yet each cell has its own ' | + | * expression of production rules is still discrete, yet each cell has its own ' |
* symbols represent cells that elongate during their lifetime and divide upon reaching terminal age. | * symbols represent cells that elongate during their lifetime and divide upon reaching terminal age. | ||
- | * effect of aging, and gradual development can be modelled | + | * effect of aging, and gradual development can be modeled |
* ' | * ' | ||
- | ==== open L-systems | + | |
+ | ==== open L-systems==== | ||
+ | * " | ||
+ | * [x.ref] | ||
====reaction diffusion systems==== | ====reaction diffusion systems==== | ||
* what advantages/ | * what advantages/ | ||
Line 73: | Line 79: | ||
====demos==== | ====demos==== | ||
* http:// | * http:// | ||
- | * http:// | + | * http:// |
- | * karl sims - panspermia (1990) http:// | + | * karl sims - panspermia (1990) http:// |