rate

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rate

1. 
a. a price or charge with reference to a standard or scale
b. (as modifier): a rate card
2. a charge made per unit for a commodity, service, etc.
3. a wage calculated against a unit of time
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

rate

[rāt]
(science and technology)
The amount of change of some quantity during a time interval divided by the length of the time interval.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The intrinsic rate of increase value ([r.sub.m]) ranged from 0.04 (at 20 [degrees]C) to 0.17 (at 26 and 29 [degrees]C).
We constructed age-stage, two sex life table to estimate life table parameters of the beetles and population dynamics parameters (r, the intrinsic rate of increase; I>> finite rate of increase; R0 the net reproductive rate, T mean generation time) using TWOSEX-MSChart (Chi, 1988, 2012a; Chi and Liu, 1985).
Furthermore, the means and standard errors of the intrinsic rate of increase (r), the net reproductive rate (Ro), the mean generation time (T) and the finite rate of population increase ([lambda]), were calculated by using the Jackknife method [23, 24].
frugiperda fed in reproductive structures of YieldGard VT PRO[TM] and PowerCore[TM] corn reduced the intrinsic rate of increase (rm) by 10 and 15%, respectively.
In the fertility life table was determined the net reproductive rate or number of female offspring ([R.sub.o]), the mean generation time (T), doubling time or the time required for the population to double in number ([D.sub.T]), the intrinsic rate of increase or the innate ability to increase ([r.sub.m]) and the maximum rate of population growth, using the formulas suggested by Silveira Neto et al.
The intrinsic rate of increase was appraised using iterative bisection method from the following equation using age indexed from 0 [35]:
Three-dimensional isopleth plots were constructed to assess the response of the conditional intrinsic rate of population increase parameter, r, to different inputted combinations of fishing mortality and the age at which 50% of sharks were selected.
The intrinsic rate of natural increase, doubling time in days and population growth rate were calculated following James and Dias (1984) and Hamada et al.
The intrinsic rate of skin ageing in any individual can also be dramatically influenced by personal and environmental factors, particularly the amount of exposure to ultraviolet light.
Here, x(t), y(t), and z(t) are the densities of hosts, parasitoids, and hyperparasitoids in generation t, respectively; [r.sub.x] is the intrinsic rate of increase of the host; and [r.sub.y] and [r.sub.z] scale the production of parasitoids and hyperparasitoids from parasitized hosts and parasitoids, respectively.
The intrinsic rate of increase (r) was calculated using the stable-age (Euler's) equation and information from the first four clutches; estimates of r for D.

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