[under construction...]
Complexity of population lattice
[introduction][result][program and source code][online resource]
what's a population lattice? A group of geographically discretely distributed populations connected by migration. Show in Figure 1 (Click to enlarge).
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| Figure 1. A population lattice, 4 by 3. Each population is numbered. Individuals in a population can move to a neighbor population. Neighborhood is defined as the nearest populations of a population. For example, population (11) has 4 neighbors:(10)(12)(01)(21). Population (00) has only two neighbors: (10)(01). |
1. Why wild at center?
In a population lattice, the population having more neighbors display wilder behavior. Their densities fluctuate greatly.
Here is a example of a 3 by 3 lattice. Totally there are 4 populations having 2 neighbors, 4 having 3 neighbors and 1 having 4 neighbors. Their density fluctuation are shown in the following 3 figures (click the figures to enlarge).
 population
at the corners. |
 population
at the edge. |
 population
in the center. |
Population Lattice: Lattice.exe
Two Populations: clone2.exe
To execute the above programs, you also need egavga.bgi.
Source code: Lattice, two-population
| Complexity
online A very useful and complete collection of complexity stuff. Complexity Digest | Beida
| US | Germany
| Measure
of complexity Entropy
on the World Wide Web IEEE Information Theory Society at UCSD A
Short Course in Information Theory A
good class on Entropy, information and complexity, in Chinese Some new ideas here.(in Chinese) A
collection of complexity webpage, eJournals and institutes.
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