cuckoo egg

The probability of the cuckoo egg being discovered by the nest owner is [P.sub.a] [member of] [0,1].

Three rules are defined in the algorithm; first, each egg in a nest stands for a solution; second, a

cuckoo egg

denotes a new solution; third, all of the cuckoos are evaluated by the fitness value of the objective function to be optimized and have velocities which directly decide the cuckoos’ flying; the intent is to use the new better solutions to replace the not so good solution in the nests.

Each egg in a nest represents a solution and cuckoo egg represents a new solution.

The host bird will identify the cuckoo egg and choose the high quality egg with probability of using

Each egg in a nest indicates a solution, and a cuckoo egg represents a new solution.

ALGORITHM 1: Cuckoo Search algorithm Generate initial population of n nests [x.sub.i], i = 1, 2, …, n for i = 1 : n Determine fitness value [F.sub.i] = f([x.sub.i]) end for while (stopping criterion is not satisfied) Generate a cuckoo egg ([x.sub.j]) from random nest by Levy flights Determine fitness value [F.sub.j] = f([x.sub.j]) Select a random nest i if [F.sub.j] > [F.sub.i] then [x.sub.i] [left arrow] [x.sub.j] [F.sub.i] [left arrow] [F.sub.j] end if Abandon a fraction [p.sub.a] of the worst nests Build new nests by Levy flights Compare fitness of new nests and keep best nest end while The exploration of alien eggs is performed for all the eggs using the probability matrix P, which is produced as

The volume is eminently readable, and at times, even witty–for instance, I like the cuckoo egg of hupostasis laid in ousia’s nest.

In the cuckoo search algorithm, the eggs in the nest are interpreted as a pool of candidate solutions of an optimization problem, while the cuckoo egg represents a new coming solution.

Cuckoo Search via Levy Flights Initialization of n host nests (population) while within the stopping criterion, Choose a cuckoo egg by Levy flights and evaluate its fitness ([F.sub.i]); Choose an egg in other’s nest randomly and calculate its fitness ([F.sub.j]); If [F.sub.i] > [F.sub.j], replace jth egg by ith egg; A fraction ([p.sub.a]) of worse nests are demolished and replaced by new ones; Preserve good nests (best solutions).

This difference in temperature means that 24 hours at 40oC gives the cuckoo egg a 31 hour head start over the host eggs.

Researchers have found that this causes the host mother to generally favor the

cuckoo egg

, as well eventually the larger cuckoo chick, over her own progeny.

I now felt like a sparrow who’d hatched a cuckoo egg,” wrote Humphrys, who died aged 56, just ten months after his last broadcast for BBC Wales in October 2007.

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Category : Cuckoo