免费逻辑斯谛增长计算器
模拟有承载力限制的逻辑斯谛增长曲线。
Population
599.86
公式
## Logistic Growth Model ### Formula **P(t) = K / (1 + ((K - P₀) / P₀) × e^(-rt))** Where: - **K** = carrying capacity (maximum population) - **P₀** = initial population - **r** = intrinsic growth rate - **t** = time ### S-Curve Logistic growth starts exponentially, slows as it approaches the carrying capacity, and levels off. The inflection point (fastest growth) occurs at P = K/2.
计算示例
Population starting at 10, carrying capacity 1000, growth rate 0.5, at time t = 10.
- 01P(10) = 1000 / (1 + 99 × e^(-5))
- 02= 1000 / (1 + 99 × 0.00674)
- 03= 1000 / (1 + 0.667)
- 04= 1000 / 1.667 ≈ 599.71
常见问题
What is logistic growth?
Logistic growth is a model where a population grows exponentially at first, then slows as it approaches a maximum (carrying capacity). It produces an S-shaped curve.
What is the carrying capacity?
The carrying capacity (K) is the maximum population size that the environment can sustain indefinitely, limited by resources, space, and competition.
Where is logistic growth used?
Population biology, epidemiology (disease spread), market saturation models, technology adoption curves, and bacterial growth in limited environments.
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