(d_{2}>0) and (a_{22}>0) are the death rate and the overcrowding rate of mature prey population, respectively.
Artificial gas lift is frequently used to boost the production rate of mature oil fields.
Assume that (S t)) and (I t)) express the densities of mature scrounger and immature scrounger, respectively, (b_{2}) ((b_{3})) is the natural mortality rate of mature (immature) scrounger, (a_{2}) ((a_{3})) is the death rate of mature (immature) scrounger caused by intraspecies competition.
We also assume that the death rate of mature population is of a logistic nature, that is, proportional to the square of the population with proportionality constant.
An important consideration in the study of forestry and industrial density-based dynamical delay model is the role of illegal logging and the depletion rate of mature trees for non-industrial uses.
Keeping the firing rate of mature cells low but fine-tuned whenever an animal is placed in a new context would mean that only sparse but specific groups of cells are involved in forming any given memory.
where ξ and β are positive constants, r 1 is the survival rate of immature individuals, r 2 is the survival rate of mature individuals, r 3 is the survival rate of infected individuals, c is the rate of immature individuals becoming mature individuals and σ is the susceptible individuals that recover with probability.
Considering the producer's ability to discover food, the number of producers, and the energy transition rate, we can regard (theta mfrac{P t)}{S t)+d}) as the birth rate of mature scrounger, and then (i t,0)=theta mfrac{P t)}{S t)+d}S t)).
Our experiment results indicated that the 0.01 mM ABA treatment inhibited leaf photosynthetic rate, stomatal conductance, and transpiration rate of mature L. chinensis to a certain extent, which are consistent with the results of former studies with inhibition of ABA on leaf gas exchange have been observed in several plant species Vardhini and Ramr (1998 Hou and Li 2001).
The increase in single positive T cells was thymus-intrinsic, independent of progenitor homing to the thymus or thymic exit rate of mature T cells.
