using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.Collections;
using?System.IO;
namespace?BP
{
????class?BP_Algorithm
????{
????????struct?Node?{
????????????public?double?lr?mturn;?//學習速率，動量因子
????????????public?double?k?_k;?//閾值及閾值變化量
????????????public?double[]?w;
????????????public?double[]?_w;?//權值及權值變化量
????????????public?double?x?y;?//輸入與輸出
????????????public?double?err;//誤差信號δ
????????}
????????private?ArrayList?netWork?=?new?ArrayList（）;?//BP網絡
????????private?ArrayList?dataSet?=?new?ArrayList（）;?//數據集合
????????public?void?DataClear（）?{?dataSet.Clear（）;?}
????????private?double?lRate?momentum;
????????private?double?xmin?xmax;
????????private?int?inSum?outSum?functionLex;
????????private?double[]?expectOut;//期望輸出
????????private?double?actualOutAvg?expectOutAvg?sqrtErr;?//實際輸出均值，期望輸出均值，總體均方誤差
????????public?double?ActualOutAvg?{
????????????get?{?return?_Normalizing（actualOutAvg）;?}
????????}
????????public?double?ExpectOutAvg?{
????????????get?{?return?_Normalizing（expectOutAvg）;?}
????????}
????????public?double?SqrtErr?{
????????????get?{?return?sqrtErr;?}
????????}
????????private?ArrayList?netError?=?new?ArrayList（）;
????????public?void?build（參數設置?stf）?{
????????????lRate?=?stf.LRate;?momentum?=?stf.Momentum;?
????????????inSum?=?stf.InSum;?outSum?=?stf.OutSum;
????????????functionLex?=?stf.FunchtionLex;?//傳遞函數類型
????????????netWork.Clear（）;?//銷毀原先網絡，按照新的參數構建網絡
????????????ArrayList?al?=?stf.Hlayers;
????????????al.Insert（0?stf.InSum）;?//插入輸入層
????????????al.Add（stf.OutSum）;?//添加輸出層
????????????Random?rd?=?new?Random（DateTime.Now.Millisecond）;
????????????int?s?sn;
????????????for?（int?i?=?0;?i?????????????????s?=?（int）al[i];?//當前層的結點數
????????????????if?（i?????????????????????sn?=?（int）al[i?+?1];?//下一層的結點數
????????????????else
????????????????????sn?=?0;?//輸出層，無下一層
????????????????ArrayList?newlayer?=?new?ArrayList（）;?//在網絡中創建一個新的層
????????????????for?（int?j?=?0;?j?????????????????????Node?newNode?=?new?Node（）;?//創建新的節點
????????????????????newNode._w?=?new?double[sn];
????????????????????newNode.w?=?new?double[sn];
????????????????????for?（int?k?=?0;?k?????????????????????????newNode.w[k]?=?rd.NextDouble（）;//w.Add（rd.NextDouble（））;?//初始化權值（隨機）
????????????????????????newNode._w[k]?=?0;//.Add（0.0）;?//初始化權值增量為0
????????????????????}
????????????????????newNode.k?=?0;//（（i?>?0?&&?i?????????????????????newNode.lr=lRate;
????????????????????newNode.mturn=momentum;
????????????????????newlayer.Add（newNode）;
????????????????}
????????????????netWork.Add（newlayer）;
????????????}
????????????expectOut?=?new?double[outSum];
????????}
????????public?void?AddData（string?sLine）?{?//數據
????????????ArrayList?d?=?new?ArrayList（）;
????????????string?[]?num?=?sLine.Split（‘?‘‘\t‘）;
????????????for?（int?i?=?0;?i?