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for (i = 0; i < n; i++)
{
v[i] += v[i]/SQRT(SUM(v[i]^2..v[n]^2))
+ (1-0.45)
* vb[i]/SQRT(SUM(vb[i]^2..vb[n]^2))
}
v(hat)[i] ~ Normal(0.6, v[i])
float [] vt = new float[3];
float [] vbest = new float[3];
float [] v = new float[3];
float [] vtplus1 = new float[3];
float alpha;
flaot lengthvt = Math.sqrt(vt[1]*vt[1] + vt[2]*vt[2] + vt[3]*vt[3]);
flaot lengthvbest = Math.sqrt(vbest[1]*vbest[1] + vbest[2]*vbest[2] + vbest[3]*vbest[3]);
float lengthv = Math.sqrt(v[1]*v[1] + v[2]*v[2] + v[3]*v[3]);
for (int j=0; j<3; j++) {
vtplus1[j] =( (alpha*lengthvt + (1.0f-alpha)lengthvbest)/lenghtv)*v[j];
}
class Hawk
attr_accessor :pos,
:vel,
:vprime,
:vhat,
:denom
#---------------------------------------------------------
def update!(best_p)
_denom!
_vprime!(best_p)
_vhat!
@vel.each_index do |x|
@vel[x] = (@alpha * @denom + (1 - @alpha) * best_p.denom) * @vhat[x]
end
end
#_________________________________________________________
##########################################################
private
##########################################################
#---------------------------------------------------------
def _denom!
b = 0
@vel.each{|x| b += x**2}
@denom = b**(1/2)
end
#_________________________________________________________
#---------------------------------------------------------
def _vprime!(bp)
@vel.each_index do |x|
@vprime[x] = @alpha *
(@vel[x] / @denom) +
(1 - @alpha) *
(bp.vel[x] / bp.denom)
end
end
#_________________________________________________________
#---------------------------------------------------------
def _vhat!
@vprime.each_index do |x|
@vhat[x] = @vprime[x].normal(@sigma)
end
end
#_________________________________________________________
end
of the vector