package?com.bp;

import?java.text.DecimalFormat;
import?java.util.Random;

public?class?BpDeep?{
	public?double[][]?layer;//神經網絡各層節點
????public?double[][]?layerErr;//神經網絡各節點誤差
????public?double[][][]?layer_weight;//各層節點權重
????public?double[][][]?layer_weight_delta;//各層節點權重動量
????public?double?mobp;//動量系數
????public?double?rate;//學習系數
????public?double?cost;//單次代價

????public?BpDeep（int[]?layernum?double?rate?double?mobp）{
????????this.mobp?=?mobp;
????????this.rate?=?rate;
????????this.cost?=?0.0f;//單次代價

????????layer?=?new?double[layernum.length][];
????????layerErr?=?new?double[layernum.length][];
????????layer_weight?=?new?double[layernum.length][][];
????????layer_weight_delta?=?new?double[layernum.length][][];
????????Random?random?=?new?Random（）;
????????for（int?l=0;lyernum.length;l++）{
????????????layer[l]=new?double[layernum[l]];
????????????layerErr[l]=new?double[layernum[l]];
????????????if（l+1yernum.length）{
????????????????layer_weight[l]=new?double[layernum[l]+1][layernum[l+1]];
????????????????layer_weight_delta[l]=new?double[layernum[l]+1][layernum[l+1]];
????????????????for（int?j=0;jyernum[l]+1;j++）
????????????????????for（int?i=0;iyernum[l+1];i++）{
????????????????????	double?r1?=?Math.sqrt（6）?/?Math.sqrt（layernum[l]?+?layernum[l+1]?+?1）;
????????????????????????layer_weight[l][j][i]=random.nextDouble（）*2*r1-r1;//隨機初始化權重
????????????????????	//layer_weight[l][j][i]=random.nextDouble（）;
????????????????????}
????????????}???
????????}
????}
????//逐層向前計算輸出
????public?double[]?computeOut（double[]?in）{
????????for（int?l=1;lyer.length;l++）{
????????????for（int?j=0;jyer[l].length;j++）{
????????????????double?z=layer_weight[l-1][layer[l-1].length][j];
????????????????for（int?i=0;iyer[l-1].length;i++）{
????????????????????layer[l-1][i]=l==1?in[i]:layer[l-1][i];//?l==1時說明是第一層輸入層
????????????????????z+=layer_weight[l-1][i][j]*layer[l-1][i];
????????????????}
????????????????layer[l][j]=1/（1+Math.exp（-z））;
????????????}
????????}
????????return?layer[layer.length-1];
????}
????//逐層反向計算誤差并修改權重
????public?void?updateWeight（double[]?tar）{
????????int?l=layer.length-1;
????????for（int?j=0;jyerErr[l].length;j++）
????????????layerErr[l][j]=layer[l][j]*（1-layer[l][j]）*（tar[j]-layer[l][j]）;

????????while（l-->0）{
????????????for（int?j=0;jyerErr[l].length;j++）{
????????????????double?z?=?0.0;
????????????????for（int?i=0;iyerErr[l+1].length;i++）{
????????????????????z=z+l>0?layerErr[l+1][i]*layer_weight[l][j][i]:0;
????????????????????layer_weight_delta[l][j][i]=?mobp*layer_weight_delta[l][j][i]+rate*layerErr[l+1][i]*layer[l][j];//隱含層動量調整
????????????????????layer_weight[l][j][i]+=layer_weight_delta[l][j][i];//隱含層權重調整
????????????????????if（j==layerErr[l].length-1）{
????????????????????????layer_weight_delta[l][j+1][i]=?mobp*layer_weight_delta[l][j+1][i]+rate*layerErr[l+1][i];//截距動量調整
????????????????????????layer_weight[l][j+1][i]+=layer_weight_delta

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-08-25?15:07??backpropagation\
?????文件?????????411??2016-08-26?10:08??backpropagation\.classpath
?????文件?????????391??2016-08-25?15:07??backpropagation\.project
?????目錄???????????0??2016-08-25?15:07??backpropagation\.settings\
?????文件?????????598??2016-08-25?15:07??backpropagation\.settings\org.eclipse.jdt.core.prefs
?????目錄???????????0??2016-08-26?10:08??backpropagation\bin\
?????目錄???????????0??2016-08-26?10:08??backpropagation\bin\com\
?????目錄???????????0??2016-08-26?10:55??backpropagation\bin\com\bp\
?????文件????????3234??2016-08-27?11:15??backpropagation\bin\com\bp\BpDeep.class
?????文件????????3114??2016-08-27?11:17??backpropagation\bin\com\bp\BpDeepRealize.class
?????文件????????1486??2016-08-26?17:47??backpropagation\bin\com\bp\BpDeepTest.class
?????文件????????7839??2016-08-25?16:26??backpropagation\bin\com\bp\data.txt
?????文件????????5941??2016-08-25?16:26??backpropagation\bin\com\bp\data_y.txt
?????文件????????5754??2016-08-25?16:27??backpropagation\bin\com\bp\per_y.txt
?????文件????????5576??2016-08-25?16:26??backpropagation\bin\com\bp\perdata.txt
?????文件?????????732??2016-08-26?10:08??backpropagation\bin\com\bp\testjava.class
?????目錄???????????0??2016-08-25?15:09??backpropagation\src\
?????目錄???????????0??2016-08-25?15:09??backpropagation\src\com\
?????目錄???????????0??2016-08-27?11:18??backpropagation\src\com\bp\
?????文件????????4307??2016-08-27?11:15??backpropagation\src\com\bp\BpDeep.java
?????文件????????4179??2016-08-27?11:17??backpropagation\src\com\bp\BpDeepRealize.java
?????文件????????1484??2016-08-26?17:47??backpropagation\src\com\bp\BpDeepTest.java
?????文件????????3166??2016-08-27?11:18??backpropagation\src\com\bp\bp.zip
?????文件????????7839??2016-08-25?16:26??backpropagation\src\com\bp\data.txt
?????文件????????5941??2016-08-25?16:26??backpropagation\src\com\bp\data_y.txt
?????文件????????5754??2016-08-25?16:27??backpropagation\src\com\bp\per_y.txt
?????文件????????5576??2016-08-25?16:26??backpropagation\src\com\bp\perdata.txt
?????文件?????????247??2016-08-25?17:09??backpropagation\src\com\bp\testjava.java