Javascript 模拟退火
我想用HTML和JavaScript编写模拟退火代码。我想为放置编码,但为了简单起见,我假设所有单元格都在一行中。我有大约30个牢房。我在网上找了一些资料,但找不到开始的代码 我的伪代码如下:Javascript 模拟退火,javascript,Javascript,我想用HTML和JavaScript编写模拟退火代码。我想为放置编码,但为了简单起见,我假设所有单元格都在一行中。我有大约30个牢房。我在网上找了一些资料,但找不到开始的代码 我的伪代码如下: Simulated_Annealing{ S = initial solution T = initial temperature (>0) while( T > 0 ) { S’ = pick a random neighbor to S C = cost of
Simulated_Annealing{
S = initial solution
T = initial temperature (>0)
while( T > 0 ) {
S’ = pick a random neighbor to S
C = cost of S – cost of S’
if( C > 0 ){
S = S’
} else {
r = random number in range [0…1]
m = 1/e| C/T |
if( r < m ) {
S = S’
}
}
T = reduced T;
}
}
模拟退火{
S=初始解
T=初始温度(>0)
而(T>0){
S'=为S选择一个随机的邻居
C=S的成本–S的成本
如果(C>0){
S=S'
}否则{
r=范围[0…1]内的随机数
m=1/e | C/T|
if(r谢谢。在GitHub上快速搜索,找到了使用模拟退火解决9皇后问题的方法。以下是相关代码:
/**
* @author Francisco Soto <ebobby@gmail.com>
*/
var SimulatedAnnealing = (function () {
var coolingFactor = 0.0,
stabilizingFactor = 0.0,
freezingTemperature = 0.0,
currentSystemEnergy = 0.0,
currentSystemTemperature = 0.0,
currentStabilizer = 0.0,
generateNewSolution = null,
generateNeighbor = null,
acceptNeighbor = null;
function _init (options) {
coolingFactor = options.coolingFactor;
stabilizingFactor = options.stabilizingFactor;
freezingTemperature = options.freezingTemperature;
generateNewSolution = options.generateNewSolution;
generateNeighbor = options.generateNeighbor;
acceptNeighbor = options.acceptNeighbor;
currentSystemEnergy = generateNewSolution();
currentSystemTemperature = options.initialTemperature;
currentStabilizer = options.initialStabilizer;
}
function _probabilityFunction (temperature, delta) {
if (delta < 0) {
return true;
}
var C = Math.exp(-delta / temperature);
var R = Math.random();
if (R < C) {
return true;
}
return false;
}
function _doSimulationStep () {
if (currentSystemTemperature > freezingTemperature) {
for (var i = 0; i < currentStabilizer; i++) {
var newEnergy = generateNeighbor(),
energyDelta = newEnergy - currentSystemEnergy;
if (_probabilityFunction(currentSystemTemperature, energyDelta)) {
acceptNeighbor();
currentSystemEnergy = newEnergy;
}
}
currentSystemTemperature = currentSystemTemperature - coolingFactor;
currentStabilizer = currentStabilizer * stabilizingFactor;
return false;
}
currentSystemTemperature = freezingTemperature;
return true;
}
return {
Initialize: function (options) {
_init(options);
},
Step: function () {
return _doSimulationStep();
},
GetCurrentEnergy: function () {
return currentSystemEnergy;
},
GetCurrentTemperature: function () {
return currentSystemTemperature;
}
};
})();
/**
*@作者弗朗西斯科·索托
*/
var SimulatedAnnealing=(函数(){
var冷却系数=0.0,
稳定系数=0.0,
自由温度=0.0,
currentSystemEnergy=0.0,
当前系统温度=0.0,
电流稳定器=0.0,
generateNewSolution=null,
generateNeighbor=null,
acceptNeighbor=null;
函数_init(选项){
coolingFactor=选项。coolingFactor;
stabilizingFactor=options.stabilizingFactor;
freezingTemperature=选项。freezingTemperature;
generateNewSolution=options.generateNewSolution;
generateNeighbor=options.generateNeighbor;
acceptNeighbor=options.acceptNeighbor;
currentSystemEnergy=generateNewSolution();
currentSystemTemperature=选项。初始温度;
电流稳定器=选项。初始稳定器;
}
函数_概率函数(温度,增量){
if(δ<0){
返回true;
}
var C=数学表达式(-delta/温度);
var R=Math.random();
if(R自由温度){
对于(var i=0;i<稳流器;i++){
var newEnergy=generateNeighbor(),
energyDelta=新能源-当前系统能源;
if(_概率函数(当前系统温度,能量衰减)){
接受邻居();
currentSystemEnergy=新能源;
}
}
currentSystemTemperature=currentSystemTemperature-冷却系数;
电流稳定器=电流稳定器*稳定因子;
返回false;
}
当前系统温度=自由温度;
返回true;
}
返回{
初始化:函数(选项){
_初始(选项);
},
步骤:函数(){
返回_doSimulationStep();
},
GetCurrentEnergy:函数(){
回流系统能量;
},
GetCurrentTemperature:函数(){
回流系统温度;
}
};
})();
恕我直言,我不是要代码,我只是想要一些帮助来开始编码。因为我是javascript的初学者,我在网上发现了这个伪代码而不是我的家庭作业。非常感谢比尔!!我不知道如何开始编码,但这段代码非常有帮助。。。。。再次感谢