| 释义 |
logistic curve
logistic curve[lə′jis·tik ′kərv] (statistics) A type of growth curve, representing the size of a population y as a function of time t : y = k/ (1 + e -kbt ), where k and b are positive constants. Also known as Pearl-Reed curve. More generally, a curve representing a function of the form y = k/ (1 + e cf (t)), where c is a constant and ƒ(t) is some function of time. logistic curve
lo·gis·tic curvean S-shaped curve that depicts the growth of a population in an area of fixed limits.logistic curve an S-shaped curve of numbers against time that represents the growth in numbers of a population of organisms in a limited environment. see GROWTH CURVE. |