vba遗传算法之非一致性突变
http://www.docin.com/p-959323141-f4.html
1 Sub 非一致性变异() 2 Dim totalGenerate As Integer, currentGenerate As Integer, ak As Double, bk As Double, vk As Double, vk1 As Double, vk2 As Double, i As Integer 3 Dim p As Integer, mytemp As Double 4 totalGenerate = 100: ak = 1#: bk = 2#: vk = 1.5: p = 2 5 Randomize 6 mytemp1 = Rnd 7 mytemp2 = Rnd 8 dety1 = (bk - vk) 9 For currentGenerate = 1 To totalGenerate 10 vk = 1.5 11 vk1 = vk + (bk - vk) * (1 - mytemp1 ^ (1 - currentGenerate / totalGenerate) ^ (p)) 12 Cells(currentGenerate, 9) = vk1 13 vk2 = vk + (vk - ak) * (1 - mytemp2 ^ ((1 - currentGenerate / totalGenerate) ^ (p))) 14 Cells(currentGenerate, 10) = vk2 15 If Rnd < 0.5 Then 16 vk = vk1 17 Else 18 vk = vk2 19 End If 20 Cells(currentGenerate, 11) = vk 21 Cells(currentGenerate, 12) = ak 22 Cells(currentGenerate, 13) = bk 23 24 Next currentGenerate 25 26 End Sub
p=2：
比如定模型参数时，参数范围为[1,3],初始值为1.5，要突变这个1.5可以用以下代码：
1 Sub 非一致性变异() 2 Dim totalGenerate As Integer, currentGenerate As Integer, ak As Double, bk As Double, vk As Double, vk1 As Double, vk2 As Double, i As Integer 3 Dim p As Integer, mytemp As Double 4 totalGenerate = 100: ak = 1: bk = 3: vk = 1.5: p = 5 5 Randomize 6 mytemp1 = Rnd 7 mytemp2 = Rnd 8 dety1 = (bk - vk) 9 For currentGenerate = 1 To totalGenerate 10 vk = 1.5 11 vk1 = vk + (bk - vk) * (1 - mytemp1 ^ (1 - currentGenerate / totalGenerate) ^ (p)) 12 Cells(currentGenerate, 9) = vk1 13 vk2 = vk - (vk - ak) * (1 - mytemp1 ^ ((1 - currentGenerate / totalGenerate) ^ (p))) 14 Cells(currentGenerate, 10) = vk2 15 If Rnd < 0.5 Then 16 vk = vk1 17 Else 18 vk = vk2 19 End If 20 Cells(currentGenerate, 11) = vk 21 Cells(currentGenerate, 12) = ak 22 Cells(currentGenerate, 13) = bk 23 24 'Cells(currentGenerate, 15) = vk + Sgn(0.5 - Rnd) * (bk - vk) * (1 - mytemp1 ^ (1 - currentGenerate / totalGenerate) ^ (p)) 'Round(2 * (0.5 - Rnd()), 0) 25 26 Next currentGenerate 27 28 End Sub
