Population Simulator 模拟器与逻辑地图 4+
人口模型模拟單峰映象生态学和生物学
TAIKI HIRATA
专为 iPad 设计
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- 免费
- 提供 App 内购买项目
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简介
"Population simulator" is an application to visually see the changes in the population by using "Logistic Map".
"Population simulator" is an application to visually see the changes in the population by using "Logistic Map".
You can see the change in the population by the Logistic Map by a line graph and colony size.
You can observe the variation pattern of population variety by changing slightly the initial value.
Logistic Map is not only used in Population Ecology but also considered one of the starting point of Chaos Theory. I developed this app to help people who are studying Population Ecology or Chaos Theory.
*Logistic Map may not necessarily apply to changes in population of actual organisms, because Logistic Map is a model of a simple change of the population.
■What is Logistic Map?
The Logistic Map is the map that is generated from the Logistic Function that has been devised as a variation model of the population of an organism.
It is expressed by the following function.
X(n+1) = a・X(n)・(1-X(n))
In the above equation, the meaning of each symbol is as follows.
・n:Generation (n=1,2,3,...)
・X(n):Value obtained by normalizing the Population of Generation n-th(0≦X(n)≦1)
・a:Value obtained by normalizing the Reproductive Rates(0≦a≦4)
You can calculate the population of the next generation from a population of a certain generation by using this function. In addition, You can predict the variation of the population over the long term by calculating the population of individuals repeatedly in this function.
■Pattern of Logistic Map
Logistic map vary widely depending on the value of "a".
・In case (0≦a≦1) : X(n) converges to 0.
・In case (1<a≦2) : X(n) converges to 1-(1/a).
・In case (2<a≦3) : X(n) converges to 1-(1/a) while oscillating.
・In case (3<a≦3.5699456・・・) : X(n) oscillate between the periodic point individual Power of 2
・In case (3.5699456・・・<a≦4) : X(n) Change irregularly.(Chaotic region)*It may become periodically by the value of a.
Please try to observe the changes of Logistic Map by changing the various initial values.
■Main function of App
1. Simulation of changes in colony size
2. Line graph of changes in population
3. Output CSV file(Need to purchase add-on.)
4. Output Graph Image(Need to purchase add-on.)
新内容
版本 2.0
・Supported iOS16.
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信息
- 提供者
- TAIKI HIRATA
- 大小
- 5.2 MB
- 类別
- 教育
- 兼容性
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- iPhone
- 设备需装有 iOS 15.0 或更高版本。
- iPad
- 设备需装有 iPadOS 15.0 或更高版本。
- iPod touch
- 设备需装有 iOS 15.0 或更高版本。
- Mac
- 需要 macOS 12.0 或更高版本以及装有 Apple M1 或更高版本芯片的 Mac。
- Apple Vision
- 设备需装有 visionOS 1.0 或更高版本。
- 语言
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日文, 英语
- 年龄分级
- 4+
- Copyright
- © TAIKI HIRATA
- 价格
- 免费
- App 内购买项目
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- Add Output Function ¥8.00