A. 人工蜂群算法里太多比喻了,能不能就算法本身的步骤来讲讲
直接给你java代码吧,看的简单易懂
import java.lang.Math;
public class beeColony {
/* Control Parameters of ABC algorithm*/
int NP=20; /* The number of colony size (employed bees+onlooker bees)*/
int FoodNumber = NP/2; /*The number of food sources equals the half of the colony size*/
int limit = 100; /*A food source which could not be improved through "limit" trials is abandoned by its employed bee*/
int maxCycle = 2500; /*The number of cycles for foraging {a stopping criteria}*/
/* Problem specific variables*/
int D = 100; /*The number of parameters of the problem to be optimized*/
double lb = -5.12; /*lower bound of the parameters. */
double ub = 5.12; /*upper bound of the parameters. lb and ub can be defined as arrays for the problems of which parameters have different bounds*/
int runtime = 30; /*Algorithm can be run many times in order to see its robustness*/
int dizi1[]=new int[10];
double Foods[][]=new double[FoodNumber][D]; /*Foods is the population of food sources. Each row of Foods matrix is a vector holding D parameters to be optimized. The number of rows of Foods matrix equals to the FoodNumber*/
double f[]=new double[FoodNumber]; /*f is a vector holding objective function values associated with food sources */
double fitness[]=new double[FoodNumber]; /*fitness is a vector holding fitness (quality) values associated with food sources*/
double trial[]=new double[FoodNumber]; /*trial is a vector holding trial numbers through which solutions can not be improved*/
double prob[]=new double[FoodNumber]; /*prob is a vector holding probabilities of food sources (solutions) to be chosen*/
double solution[]=new double[D]; /*New solution (neighbour) proced by v_{ij}=x_{ij}+\phi_{ij}*(x_{kj}-x_{ij}) j is a randomly chosen parameter and k is a randomlu chosen solution different from i*/
double ObjValSol; /*Objective function value of new solution*/
double FitnessSol; /*Fitness value of new solution*/
int neighbour, param2change; /*param2change corrresponds to j, neighbour corresponds to k in equation v_{ij}=x_{ij}+\phi_{ij}*(x_{kj}-x_{ij})*/
double GlobalMin; /*Optimum solution obtained by ABC algorithm*/
double GlobalParams[]=new double[D]; /*Parameters of the optimum solution*/
double GlobalMins[]=new double[runtime];
/*GlobalMins holds the GlobalMin of each run in multiple runs*/
double r; /*a random number in the range [0,1)*/
/*a function pointer returning double and taking a D-dimensional array as argument */
/*If your function takes additional arguments then change function pointer definition and lines calling "...=function(solution);" in the code*/
// typedef double (*FunctionCallback)(double sol[D]);
/*benchmark functions */
// double sphere(double sol[D]);
// double Rosenbrock(double sol[D]);
// double Griewank(double sol[D]);
// double Rastrigin(double sol[D]);
/*Write your own objective function name instead of sphere*/
// FunctionCallback function = &sphere;
/*Fitness function*/
double CalculateFitness(double fun)
{
double result=0;
if(fun>=0)
{
result=1/(fun+1);
}
else
{
result=1+Math.abs(fun);
}
return result;
}
/*The best food source is memorized*/
void MemorizeBestSource()
{
int i,j;
for(i=0;i<FoodNumber;i++)
{
if (f[i]<GlobalMin)
{
GlobalMin=f[i];
for(j=0;j<D;j++)
GlobalParams[j]=Foods[i][j];
}
}
}
/*Variables are initialized in the range [lb,ub]. If each parameter has different range, use arrays lb[j], ub[j] instead of lb and ub */
/* Counters of food sources are also initialized in this function*/
void init(int index)
{
int j;
for (j=0;j<D;j++)
{
r = ( (double)Math.random()*32767 / ((double)32767+(double)(1)) );
Foods[index][j]=r*(ub-lb)+lb;
solution[j]=Foods[index][j];
}
f[index]=calculateFunction(solution);
fitness[index]=CalculateFitness(f[index]);
trial[index]=0;
}
/*All food sources are initialized */
void initial()
{
int i;
for(i=0;i<FoodNumber;i++)
{
init(i);
}
GlobalMin=f[0];
for(i=0;i<D;i++)
GlobalParams[i]=Foods[0][i];
}
void SendEmployedBees()
{
int i,j;
/*Employed Bee Phase*/
for (i=0;i<FoodNumber;i++)
{
/*The parameter to be changed is determined randomly*/
r = ((double) Math.random()*32767 / ((double)(32767)+(double)(1)) );
param2change=(int)(r*D);
/*A randomly chosen solution is used in procing a mutant solution of the solution i*/
r = ( (double)Math.random()*32767 / ((double)(32767)+(double)(1)) );
neighbour=(int)(r*FoodNumber);
/*Randomly selected solution must be different from the solution i*/
// while(neighbour==i)
// {
// r = ( (double)Math.random()*32767 / ((double)(32767)+(double)(1)) );
// neighbour=(int)(r*FoodNumber);
// }
for(j=0;j<D;j++)
solution[j]=Foods[i][j];
/*v_{ij}=x_{ij}+\phi_{ij}*(x_{kj}-x_{ij}) */
r = ( (double)Math.random()*32767 / ((double)(32767)+(double)(1)) );
solution[param2change]=Foods[i][param2change]+(Foods[i][param2change]-Foods[neighbour][param2change])*(r-0.5)*2;
/*if generated parameter value is out of boundaries, it is shifted onto the boundaries*/
if (solution[param2change]<lb)
solution[param2change]=lb;
if (solution[param2change]>ub)
solution[param2change]=ub;
ObjValSol=calculateFunction(solution);
FitnessSol=CalculateFitness(ObjValSol);
/*a greedy selection is applied between the current solution i and its mutant*/
if (FitnessSol>fitness[i])
{
/*If the mutant solution is better than the current solution i, replace the solution with the mutant and reset the trial counter of solution i*/
trial[i]=0;
for(j=0;j<D;j++)
Foods[i][j]=solution[j];
f[i]=ObjValSol;
fitness[i]=FitnessSol;
}
else
{ /*if the solution i can not be improved, increase its trial counter*/
trial[i]=trial[i]+1;
}
}
/*end of employed bee phase*/
}
/* A food source is chosen with the probability which is proportioal to its quality*/
/*Different schemes can be used to calculate the probability values*/
/*For example prob(i)=fitness(i)/sum(fitness)*/
/*or in a way used in the metot below prob(i)=a*fitness(i)/max(fitness)+b*/
/*probability values are calculated by using fitness values and normalized by dividing maximum fitness value*/
void CalculateProbabilities()
{
int i;
double maxfit;
maxfit=fitness[0];
for (i=1;i<FoodNumber;i++)
{
if (fitness[i]>maxfit)
maxfit=fitness[i];
}
for (i=0;i<FoodNumber;i++)
{
prob[i]=(0.9*(fitness[i]/maxfit))+0.1;
}
}
void SendOnlookerBees()
{
int i,j,t;
i=0;
t=0;
/*onlooker Bee Phase*/
while(t<FoodNumber)
{
r = ( (double)Math.random()*32767 / ((double)(32767)+(double)(1)) );
if(r<prob[i]) /*choose a food source depending on its probability to be chosen*/
{
t++;
/*The parameter to be changed is determined randomly*/
r = ((double)Math.random()*32767 / ((double)(32767)+(double)(1)) );
param2change=(int)(r*D);
/*A randomly chosen solution is used in procing a mutant solution of the solution i*/
r = ( (double)Math.random()*32767 / ((double)(32767)+(double)(1)) );
neighbour=(int)(r*FoodNumber);
/*Randomly selected solution must be different from the solution i*/
while(neighbour == i)
{
//System.out.println(Math.random()*32767+" "+32767);
r = ( (double)Math.random()*32767 / ((double)(32767)+(double)(1)) );
neighbour=(int)(r*FoodNumber);
}
for(j=0;j<D;j++)
solution[j]=Foods[i][j];
/*v_{ij}=x_{ij}+\phi_{ij}*(x_{kj}-x_{ij}) */
r = ( (double)Math.random()*32767 / ((double)(32767)+(double)(1)) );
solution[param2change]=Foods[i][param2change]+(Foods[i][param2change]-Foods[neighbour][param2change])*(r-0.5)*2;
/*if generated parameter value is out of boundaries, it is shifted onto the boundaries*/
if (solution[param2change]<lb)
solution[param2change]=lb;
if (solution[param2change]>ub)
solution[param2change]=ub;
ObjValSol=calculateFunction(solution);
FitnessSol=CalculateFitness(ObjValSol);
/*a greedy selection is applied between the current solution i and its mutant*/
if (FitnessSol>fitness[i])
{
/*If the mutant solution is better than the current solution i, replace the solution with the mutant and reset the trial counter of solution i*/
trial[i]=0;
for(j=0;j<D;j++)
Foods[i][j]=solution[j];
f[i]=ObjValSol;
fitness[i]=FitnessSol;
}
else
{ /*if the solution i can not be improved, increase its trial counter*/
trial[i]=trial[i]+1;
}
} /*if */
i++;
if (i==FoodNumber-1)
i=0;
}/*while*/
/*end of onlooker bee phase */
}
/*determine the food sources whose trial counter exceeds the "limit" value. In Basic ABC, only one scout is allowed to occur in each cycle*/
void SendScoutBees()
{
int maxtrialindex,i;
maxtrialindex=0;
for (i=1;i<FoodNumber;i++)
{
if (trial[i]>trial[maxtrialindex])
maxtrialindex=i;
}
if(trial[maxtrialindex]>=limit)
{
init(maxtrialindex);
}
}
double calculateFunction(double sol[])
{
return Rastrigin (sol);
}
double sphere(double sol[])
{
int j;
double top=0;
for(j=0;j<D;j++)
{
top=top+sol[j]*sol[j];
}
return top;
}
double Rosenbrock(double sol[])
{
int j;
double top=0;
for(j=0;j<D-1;j++)
{
top=top+100*Math.pow((sol[j+1]-Math.pow((sol[j]),(double)2)),(double)2)+Math.pow((sol[j]-1),(double)2);
}
return top;
}
double Griewank(double sol[])
{
int j;
double top1,top2,top;
top=0;
top1=0;
top2=1;
for(j=0;j<D;j++)
{
top1=top1+Math.pow((sol[j]),(double)2);
top2=top2*Math.cos((((sol[j])/Math.sqrt((double)(j+1)))*Math.PI)/180);
}
top=(1/(double)4000)*top1-top2+1;
return top;
}
double Rastrigin(double sol[])
{
int j;
double top=0;
for(j=0;j<D;j++)
{
top=top+(Math.pow(sol[j],(double)2)-10*Math.cos(2*Math.PI*sol[j])+10);
}
return top;
}
}
使用方法是:
public class test {
static beeColony bee=new beeColony();
public static void main(String[] args) {
int iter=0;
int run=0;
int j=0;
double mean=0;
//srand(time(NULL));
for(run=0;run<bee.runtime;run++)
{
bee.initial();
bee.MemorizeBestSource();
for (iter=0;iter<bee.maxCycle;iter++)
{
bee.SendEmployedBees();
bee.CalculateProbabilities();
bee.SendOnlookerBees();
bee.MemorizeBestSource();
bee.SendScoutBees();
}
for(j=0;j<bee.D;j++)
{
//System.out.println("GlobalParam[%d]: %f\n",j+1,GlobalParams[j]);
System.out.println("GlobalParam["+(j+1)+"]:"+bee.GlobalParams[j]);
}
//System.out.println("%d. run: %e \n",run+1,GlobalMin);
System.out.println((run+1)+".run:"+bee.GlobalMin);
bee.GlobalMins[run]=bee.GlobalMin;
mean=mean+bee.GlobalMin;
}
mean=mean/bee.runtime;
//System.out.println("Means of %d runs: %e\n",runtime,mean);
System.out.println("Means of "+bee.runtime+"runs: "+mean);
}
}
B. 人工蜂群算法的matlab的编程详细代码,最好有基于人工蜂群算法的人工神经网络的编程代码
蚁群算法(ant colony optimization, ACO),又称蚂蚁算法,是一种用来在图中寻找优化路径的机率型算法。它由Marco Dorigo于1992年在他的博士论文中提出,其灵感来源于蚂蚁在寻找食物过程中发现路径的行为。蚁群算法是一种模拟进化算法,初步的研究表明该算法具有许多优良的性质。针对PID控制器参数优化设计问题,将蚁群算法设计的结果与遗传算法设计的结果进行了比较,数值仿真结果表明,蚁群算法具有一种新的模拟进化优化方法的有效性和应用价值。
参考下蚁群训练BP网络的代码。
C. java人工蜂群算法求解TSP问题
一、人工蜂群算法的介绍
人工蜂群算法(Artificial Bee Colony, ABC)是由Karaboga于2005年提出的一种新颖的基于群智能的全局优化算法,其直观背景来源于蜂群的采蜜行为,蜜蜂根据各自的分工进行不同的活动,并实现蜂群信息的共享和交流,从而找到问题的最优解。人工蜂群算法属于群智能算法的一种。
二、人工蜂群算法的原理
1、原理
标准的ABC算法通过模拟实际蜜蜂的采蜜机制将人工蜂群分为3类: 采蜜蜂、观察蜂和侦察蜂。整个蜂群的目标是寻找花蜜量最大的蜜源。在标准的ABC算法中,采蜜蜂利用先前的蜜源信息寻找新的蜜源并与观察蜂分享蜜源信息;观察蜂在蜂房中等待并依据采蜜蜂分享的信息寻找新的蜜源;侦查蜂的任务是寻找一个新的有价值的蜜源,它们在蜂房附近随机地寻找蜜源。
假设问题的解空间是。
代码:
[cpp]view plain
#include<iostream>
#include<time.h>
#include<stdlib.h>
#include<cmath>
#include<fstream>
#include<iomanip>
usingnamespacestd;
constintNP=40;//种群的规模,采蜜蜂+观察蜂
constintFoodNumber=NP/2;//食物的数量,为采蜜蜂的数量
constintlimit=20;//限度,超过这个限度没有更新采蜜蜂变成侦查蜂
constintmaxCycle=10000;//停止条件
/*****函数的特定参数*****/
constintD=2;//函数的参数个数
constdoublelb=-100;//函数的下界
constdoubleub=100;//函数的上界
doubleresult[maxCycle]={0};
/*****种群的定义****/
structBeeGroup
{
doublecode[D];//函数的维数
doubletrueFit;//记录真实的最小值
doublefitness;
doublerfitness;//相对适应值比例
inttrail;//表示实验的次数,用于与limit作比较
}Bee[FoodNumber];
BeeGroupNectarSource[FoodNumber];//蜜源,注意:一切的修改都是针对蜜源而言的
BeeGroupEmployedBee[FoodNumber];//采蜜蜂
BeeGroupOnLooker[FoodNumber];//观察蜂
BeeGroupBestSource;//记录最好蜜源
/*****函数的声明*****/
doublerandom(double,double);//产生区间上的随机数
voidinitilize();//初始化参数
doublecalculationTruefit(BeeGroup);//计算真实的函数值
doublecalculationFitness(double);//计算适应值
voidCalculateProbabilities();//计算轮盘赌的概率
voidevalueSource();//评价蜜源
voidsendEmployedBees();
voidsendOnlookerBees();
voidsendScoutBees();
voidMemorizeBestSource();
/*******主函数*******/
intmain()
{
ofstreamoutput;
output.open("dataABC.txt");
srand((unsigned)time(NULL));
initilize();//初始化
MemorizeBestSource();//保存最好的蜜源
//主要的循环
intgen=0;
while(gen<maxCycle)
{
sendEmployedBees();
CalculateProbabilities();
sendOnlookerBees();
MemorizeBestSource();
sendScoutBees();
MemorizeBestSource();
output<<setprecision(30)<<BestSource.trueFit<<endl;
gen++;
}
output.close();
cout<<"运行结束!!"<<endl;
return0;
}
/*****函数的实现****/
doublerandom(doublestart,doubleend)//随机产生区间内的随机数
{
returnstart+(end-start)*rand()/(RAND_MAX+1.0);
}
voidinitilize()//初始化参数
{
inti,j;
for(i=0;i<FoodNumber;i++)
{
for(j=0;j<D;j++)
{
NectarSource[i].code[j]=random(lb,ub);
EmployedBee[i].code[j]=NectarSource[i].code[j];
OnLooker[i].code[j]=NectarSource[i].code[j];
BestSource.code[j]=NectarSource[0].code[j];
}
/****蜜源的初始化*****/
NectarSource[i].trueFit=calculationTruefit(NectarSource[i]);
NectarSource[i].fitness=calculationFitness(NectarSource[i].trueFit);
NectarSource[i].rfitness=0;
NectarSource[i].trail=0;
/****采蜜蜂的初始化*****/
EmployedBee[i].trueFit=NectarSource[i].trueFit;
EmployedBee[i].fitness=NectarSource[i].fitness;
EmployedBee[i].rfitness=NectarSource[i].rfitness;
EmployedBee[i].trail=NectarSource[i].trail;
/****观察蜂的初始化****/
OnLooker[i].trueFit=NectarSource[i].trueFit;
OnLooker[i].fitness=NectarSource[i].fitness;
OnLooker[i].rfitness=NectarSource[i].rfitness;
OnLooker[i].trail=NectarSource[i].trail;
}
/*****最优蜜源的初始化*****/
BestSource.trueFit=NectarSource[0].trueFit;
BestSource.fitness=NectarSource[0].fitness;
BestSource.rfitness=NectarSource[0].rfitness;
BestSource.trail=NectarSource[0].trail;
}
doublecalculationTruefit(BeeGroupbee)//计算真实的函数值
{
doubletruefit=0;
/******测试函数1******/
truefit=0.5+(sin(sqrt(bee.code[0]*bee.code[0]+bee.code[1]*bee.code[1]))*sin(sqrt(bee.code[0]*bee.code[0]+bee.code[1]*bee.code[1]))-0.5)
/((1+0.001*(bee.code[0]*bee.code[0]+bee.code[1]*bee.code[1]))*(1+0.001*(bee.code[0]*bee.code[0]+bee.code[1]*bee.code[1])));
returntruefit;
}
doublecalculationFitness(doubletruefit)//计算适应值
{
doublefitnessResult=0;
if(truefit>=0)
{
fitnessResult=1/(truefit+1);
}else
{
fitnessResult=1+abs(truefit);
}
returnfitnessResult;
}
voidsendEmployedBees()//修改采蜜蜂的函数
{
inti,j,k;
intparam2change;//需要改变的维数
doubleRij;//[-1,1]之间的随机数
for(i=0;i<FoodNumber;i++)
{
param2change=(int)random(0,D);//随机选取需要改变的维数
/******选取不等于i的k********/
while(1)
{
k=(int)random(0,FoodNumber);
if(k!=i)
{
break;
}
}
for(j=0;j<D;j++)
{
EmployedBee[i].code[j]=NectarSource[i].code[j];
}
/*******采蜜蜂去更新信息*******/
Rij=random(-1,1);
EmployedBee[i].code[param2change]=NectarSource[i].code[param2change]+Rij*(NectarSource[i].code[param2change]-NectarSource[k].code[param2change]);
/*******判断是否越界********/
if(EmployedBee[i].code[param2change]>ub)
{
EmployedBee[i].code[param2change]=ub;
}
if(EmployedBee[i].code[param2change]<lb)
{
EmployedBee[i].code[param2change]=lb;
}
EmployedBee[i].trueFit=calculationTruefit(EmployedBee[i]);
EmployedBee[i].fitness=calculationFitness(EmployedBee[i].trueFit);
/******贪婪选择策略*******/
if(EmployedBee[i].trueFit<NectarSource[i].trueFit)
{
for(j=0;j<D;j++)
{
NectarSource[i].code[j]=EmployedBee[i].code[j];
}
NectarSource[i].trail=0;
NectarSource[i].trueFit=EmployedBee[i].trueFit;
NectarSource[i].fitness=EmployedBee[i].fitness;
}else
{
NectarSource[i].trail++;
}
}
}
voidCalculateProbabilities()//计算轮盘赌的选择概率
{
inti;
doublemaxfit;
maxfit=NectarSource[0].fitness;
for(i=1;i<FoodNumber;i++)
{
if(NectarSource[i].fitness>maxfit)
maxfit=NectarSource[i].fitness;
}
for(i=0;i<FoodNumber;i++)
{
NectarSource[i].rfitness=(0.9*(NectarSource[i].fitness/maxfit))+0.1;
}
}
voidsendOnlookerBees()//采蜜蜂与观察蜂交流信息,观察蜂更改信息
{
inti,j,t,k;
doubleR_choosed;//被选中的概率
intparam2change;//需要被改变的维数
doubleRij;//[-1,1]之间的随机数
i=0;
t=0;
while(t<FoodNumber)
{
R_choosed=random(0,1);
if(R_choosed<NectarSource[i].rfitness)//根据被选择的概率选择
{
t++;
param2change=(int)random(0,D);
/******选取不等于i的k********/
while(1)
{
k=(int)random(0,FoodNumber);
if(k!=i)
{
break;
}
}
for(j=0;j<D;j++)
{
OnLooker[i].code[j]=NectarSource[i].code[j];
}
/****更新******/
Rij=random(-1,1);
OnLooker[i].code[param2change]=NectarSource[i].code[param2change]+Rij*(NectarSource[i].code[param2change]-NectarSource[k].code[param2change]);
/*******判断是否越界*******/
if(OnLooker[i].code[param2change]<lb)
{
OnLooker[i].code[param2change]=lb;
}
if(OnLooker[i].code[param2change]>ub)
{
OnLooker[i].code[param2change]=ub;
}
OnLooker[i].trueFit=calculationTruefit(OnLooker[i]);
OnLooker[i].fitness=calculationFitness(OnLooker[i].trueFit);
/****贪婪选择策略******/
if(OnLooker[i].trueFit<NectarSource[i].trueFit)
{
for(j=0;j<D;j++)
{
NectarSource[i].code[j]=OnLooker[i].code[j];
}
NectarSource[i].trail=0;
NectarSource[i].trueFit=OnLooker[i].trueFit;
NectarSource[i].fitness=OnLooker[i].fitness;
}else
{
NectarSource[i].trail++;
}
}
i++;
if(i==FoodNumber)
{
i=0;
}
}
}
D. 蜂群算法和adaboost算法哪个泛化性能好
AdaBoost算法里面 要求弱分类器正确率>50%并且各个弱分类器相互独立 可是如果弱分类器错误率均在50%以下,但不完全独立 会造成什么样的后果呢?今天和aa讨论的,弱分类器用最小平方误差,最小平方误差的错误率应该是50%以下的
E. 人工蜂群算法的蜜蜂采蜜机理
蜜蜂是一种群居昆虫,虽然单个昆虫的行为极其简单,但是由单个简单的个体所组成的群体却表现出极其复杂的行为。真实的蜜蜂种群能够在任何环境下,以极高的效率从食物源(花朵)中采集花蜜;同时,它们能适应环境的改变。
蜂群产生群体智慧的最小搜索模型包含基本的三个组成要素:食物源、被雇佣的蜜蜂(employed foragers)和未被雇佣的蜜蜂(unemployed foragers);两种最为基本的行为模型:为食物源招募(recruit)蜜蜂和放弃(abandon)某个食物源。
(1)食物源:食物源的价值由多方面的因素决定,如:它离蜂巢的远近,包含花蜜的丰富程度和获得花蜜的难易程度。使用单一的参数,食物源的“收益率”(profitability),来代表以上各个因素。
(2)被雇用的蜜蜂:也称引领蜂(Leader),其与所采集的食物源一一对应。引领蜂储存有某一个食物源的相关信息(相对于蜂巢的距离、方向、食物源的丰富程度等)并且将这些信息以一定的概率与其他蜜蜂分享。
(3)未被雇用的蜜蜂:其主要任务是寻找和开采食物源。有两种未被雇用的蜜蜂:侦查蜂(Scouter)和跟随蜂(Follower)。侦察蜂搜索蜂巢附近的新食物源;跟随蜂等在蜂巢里面并通过与引领蜂分享相关信息找到食物源。一般情况下,侦察蜂的平均数目是蜂群的5%-20%。
在群体智慧的形成过程中,蜜蜂间交换信息是最为重要的一环。舞蹈区是蜂巢中最为重要的信息交换地。蜜蜂的舞蹈叫做摇摆舞。食物源的信息在舞蹈区通过摇摆舞的形式与其他蜜蜂共享,引领蜂通过摇摆舞的持续时间等来表现食物源的收益率,故跟随蜂可以观察到大量的舞蹈并依据收益率来选择到哪个食物源采蜜。收益率与食物源被选择的可能性成正比。因而,蜜蜂被招募到某一个食物源的概率与食物源的收益率成正比。
初始时刻,蜜蜂以侦察蜂的身份搜索。其搜索可以由系统提供的先验知识决定,也可以完全随机。经过一轮侦查后,若蜜蜂找到食物源,蜜蜂利用它本身的存储能力记录位置信息并开始采蜜。此时,蜜蜂将成为“被雇用者”。蜜蜂在食物源采蜜后回到蜂巢卸下蜂蜜然后将有如下选择:
(1)放弃食物源而成为非雇佣蜂。
(2)跳摇摆舞为所对应的食物源招募更多的蜜蜂,然后回到食物源采蜜。
(3)继续在同一个食物源采蜜而不进行招募。
对于非雇佣蜂有如下选择:
(1)转变成为侦察蜂并搜索蜂巢附近的食物源。其搜索可以由先验知识决定,也可以完全随机。
(2)在观察完摇摆舞后被雇用成为跟随蜂,开始搜索对应食物源邻域并采蜜。
F. 有没有人有多目标人工蜂群算法的MATLAB代码。发我一份 不胜感激!!
http://emuch.net/bbs/attachment.php?tid=3808850&aid=11221&pay=yes
里面有多个文件
其中之一
%/* ABC algorithm coded using MATLAB language */
%/* Artificial Bee Colony (ABC) is one of the most recently defined algorithms by Dervis Karaboga in 2005, motivated by the intelligent behavior of honey bees. */
%/* Referance Papers*/
%/*D. Karaboga, AN IDEA BASED ON HONEY BEE SWARM FOR NUMERICAL OPTIMIZATION,TECHNICAL REPORT-TR06, Erciyes University, Engineering Faculty, Computer Engineering Department 2005.*/
%/*D. Karaboga, B. Basturk, A powerful and Efficient Algorithm for Numerical Function Optimization: Artificial Bee Colony (ABC) Algorithm, Journal of Global Optimization, Volume:39, Issue:3,pp:459-171, November 2007,ISSN:0925-5001 , doi: 10.1007/s10898-007-9149-x */
%/*D. Karaboga, B. Basturk, On The Performance Of Artificial Bee Colony (ABC) Algorithm, Applied Soft Computing,Volume 8, Issue 1, January 2008, Pages 687-697. */
%/*D. Karaboga, B. Akay, A Comparative Study of Artificial Bee Colony Algorithm, Applied Mathematics and Computation, 214, 108-132, 2009. */
%/*Copyright ?2009 Erciyes University, Intelligent Systems Research Group, The Dept. of Computer Engineering*/
%/*Contact:
%Dervis Karaboga ([email protected] )
%Bahriye Basturk Akay ([email protected])
%*/
clear all
close all
clc
%/* Control Parameters of ABC algorithm*/
NP=20; %/* The number of colony size (employed bees+onlooker bees)*/
FoodNumber=NP/2; %/*The number of food sources equals the half of the colony size*/
limit=100; %/*A food source which could not be improved through "limit" trials is abandoned by its employed bee*/
maxCycle=2500; %/*The number of cycles for foraging {a stopping criteria}*/
%/* Problem specific variables*/
objfun='Sphere'; %cost function to be optimized
D=100; %/*The number of parameters of the problem to be optimized*/
ub=ones(1,D)*100; %/*lower bounds of the parameters. */
lb=ones(1,D)*(-100);%/*upper bound of the parameters.*/
runtime=1;%/*Algorithm can be run many times in order to see its robustness*/
%Foods [FoodNumber][D]; /*Foods is the population of food sources. Each row of Foods matrix is a vector holding D parameters to be optimized. The number of rows of Foods matrix equals to the FoodNumber*/
%ObjVal[FoodNumber]; /*f is a vector holding objective function values associated with food sources */
%Fitness[FoodNumber]; /*fitness is a vector holding fitness (quality) values associated with food sources*/
%trial[FoodNumber]; /*trial is a vector holding trial numbers through which solutions can not be improved*/
%prob[FoodNumber]; /*prob is a vector holding probabilities of food sources (solutions) to be chosen*/
%solution [D]; /*New solution (neighbour) proced by v_{ij}=x_{ij}+\phi_{ij}*(x_{kj}-x_{ij}) j is a randomly chosen parameter and k is a randomlu chosen solution different from i*/
%ObjValSol; /*Objective function value of new solution*/
%FitnessSol; /*Fitness value of new solution*/
%neighbour, param2change; /*param2change corrresponds to j, neighbour corresponds to k in equation v_{ij}=x_{ij}+\phi_{ij}*(x_{kj}-x_{ij})*/
%GlobalMin; /*Optimum solution obtained by ABC algorithm*/
%GlobalParams[D]; /*Parameters of the optimum solution*/
%GlobalMins[runtime]; /*GlobalMins holds the GlobalMin of each run in multiple runs*/
GlobalMins=zeros(1,runtime);
for r=1:runtime
% /*All food sources are initialized */
%/*Variables are initialized in the range [lb,ub]. If each parameter has different range, use arrays lb[j], ub[j] instead of lb and ub */
Range = repmat((ub-lb),[FoodNumber 1]);
Lower = repmat(lb, [FoodNumber 1]);
Foods = rand(FoodNumber,D) .* Range + Lower;
ObjVal=feval(objfun,Foods);
Fitness=calculateFitness(ObjVal);
%reset trial counters
trial=zeros(1,FoodNumber);
%/*The best food source is memorized*/
BestInd=find(ObjVal==min(ObjVal));
BestInd=BestInd(end);
GlobalMin=ObjVal(BestInd);
GlobalParams=Foods(BestInd,:);
iter=1;
while ((iter <= maxCycle)),
%%%%%%%%% EMPLOYED BEE PHASE %%%%%%%%%%%%%%%%%%%%%%%%
for i=1:(FoodNumber)
%/*The parameter to be changed is determined randomly*/
Param2Change=fix(rand*D)+1;
%/*A randomly chosen solution is used in procing a mutant solution of the solution i*/
neighbour=fix(rand*(FoodNumber))+1;
%/*Randomly selected solution must be different from the solution i*/
while(neighbour==i)
neighbour=fix(rand*(FoodNumber))+1;
end;
sol=Foods(i,:);
% /*v_{ij}=x_{ij}+\phi_{ij}*(x_{kj}-x_{ij}) */
sol(Param2Change)=Foods(i,Param2Change)+(Foods(i,Param2Change)-Foods(neighbour,Param2Change))*(rand-0.5)*2;
% /*if generated parameter value is out of boundaries, it is shifted onto the boundaries*/
ind=find(sol<lb);
sol(ind)=lb(ind);
ind=find(sol>ub);
sol(ind)=ub(ind);
%evaluate new solution
ObjValSol=feval(objfun,sol);
FitnessSol=calculateFitness(ObjValSol);
% /*a greedy selection is applied between the current solution i and its mutant*/
if (FitnessSol>Fitness(i)) %/*If the mutant solution is better than the current solution i, replace the solution with the mutant and reset the trial counter of solution i*/
Foods(i,:)=sol;
Fitness(i)=FitnessSol;
ObjVal(i)=ObjValSol;
trial(i)=0;
else
trial(i)=trial(i)+1; %/*if the solution i can not be improved, increase its trial counter*/
end;
end;
%%%%%%%%%%%%%%%%%%%%%%%% CalculateProbabilities %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%/* A food source is chosen with the probability which is proportioal to its quality*/
%/*Different schemes can be used to calculate the probability values*/
%/*For example prob(i)=fitness(i)/sum(fitness)*/
%/*or in a way used in the metot below prob(i)=a*fitness(i)/max(fitness)+b*/
%/*probability values are calculated by using fitness values and normalized by dividing maximum fitness value*/
prob=(0.9.*Fitness./max(Fitness))+0.1;
%%%%%%%%%%%%%%%%%%%%%%%% ONLOOKER BEE PHASE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
i=1;
t=0;
while(t<FoodNumber)
if(rand<prob(i))
t=t+1;
%/*The parameter to be changed is determined randomly*/
Param2Change=fix(rand*D)+1;
%/*A randomly chosen solution is used in procing a mutant solution of the solution i*/
neighbour=fix(rand*(FoodNumber))+1;
%/*Randomly selected solution must be different from the solution i*/
while(neighbour==i)
neighbour=fix(rand*(FoodNumber))+1;
end;
sol=Foods(i,:);
% /*v_{ij}=x_{ij}+\phi_{ij}*(x_{kj}-x_{ij}) */
sol(Param2Change)=Foods(i,Param2Change)+(Foods(i,Param2Change)-Foods(neighbour,Param2Change))*(rand-0.5)*2;
% /*if generated parameter value is out of boundaries, it is shifted onto the boundaries*/
ind=find(sol<lb);
sol(ind)=lb(ind);
ind=find(sol>ub);
sol(ind)=ub(ind);
%evaluate new solution
ObjValSol=feval(objfun,sol);
FitnessSol=calculateFitness(ObjValSol);
% /*a greedy selection is applied between the current solution i and its mutant*/
if (FitnessSol>Fitness(i)) %/*If the mutant solution is better than the current solution i, replace the solution with the mutant and reset the trial counter of solution i*/
Foods(i,:)=sol;
Fitness(i)=FitnessSol;
ObjVal(i)=ObjValSol;
trial(i)=0;
else
trial(i)=trial(i)+1; %/*if the solution i can not be improved, increase its trial counter*/
end;
end;
i=i+1;
if (i==(FoodNumber)+1)
i=1;
end;
end;
%/*The best food source is memorized*/
ind=find(ObjVal==min(ObjVal));
ind=ind(end);
if (ObjVal(ind)<GlobalMin)
GlobalMin=ObjVal(ind);
GlobalParams=Foods(ind,:);
end;
%%%%%%%%%%%% SCOUT BEE PHASE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%/*determine the food sources whose trial counter exceeds the "limit" value.
%In Basic ABC, only one scout is allowed to occur in each cycle*/
ind=find(trial==max(trial));
ind=ind(end);
if (trial(ind)>limit)
Bas(ind)=0;
sol=(ub-lb).*rand(1,D)+lb;
ObjValSol=feval(objfun,sol);
FitnessSol=calculateFitness(ObjValSol);
Foods(ind,:)=sol;
Fitness(ind)=FitnessSol;
ObjVal(ind)=ObjValSol;
end;
fprintf('Ýter=%d ObjVal=%g\n',iter,GlobalMin);
iter=iter+1;
end % End of ABC
GlobalMins(r)=GlobalMin;
end; %end of runs
save all
G. 蜂群算法与人工蜂群算法有什么的区别吗
都是一样的,为什么有的会带上“人工”呢?只是因为这些只能算法都是“人”仿照动物行为而创造的,所以有时候才会带上“人工”两个字。但是指的是一个东西。
例如神经网络,也有人喜欢说是人工神经网络
H. 粒子群算法,遗传算法,人工蜂群算法都属于进化算法么
遗传算法 ,差分进化,粒子群,蚁群,模拟退火,人工鱼群,蜂群,果蝇优化等都可以优化svm参数
I. 近年来比较新颖的智能算法有哪些,比蜂群算法更新颖的算法。最好是元启发式的算法。
萤火虫算法、杂草算法、蝙蝠算法。在知网上可搜索到相应论文。