BP神經(jīng)網(wǎng)絡(luò)訓(xùn)練過程

1、BP神經(jīng)網(wǎng)絡(luò)訓(xùn)練步驟神經(jīng)網(wǎng)絡(luò)訓(xùn)練步驟隱藏層隱藏層輸出層輸出層輸入層輸入層基基函數(shù)為線性基函數(shù)函數(shù)為線性基函數(shù)隱藏層的激活函數(shù)為隱藏層的激活函數(shù)為SigmoidSigmoid函數(shù)函數(shù)輸出函數(shù)為線性函數(shù)輸出函數(shù)為線性函數(shù)培訓(xùn)類型：個(gè)案處理（在線處理培訓(xùn)類型：個(gè)案處理（在線處理SPSSSPSS）閾值更新網(wǎng)絡(luò)初始化權(quán)值更新判斷迭代是否結(jié)束隱含層輸出計(jì)算輸出層輸出計(jì)算誤差計(jì)算YESNO網(wǎng)絡(luò)初始化網(wǎng)絡(luò)初始化初始化輸入層初始化輸入層、隱含層、輸出層節(jié)點(diǎn)數(shù)隱含層、輸出層節(jié)點(diǎn)數(shù)n n、l l、m m初始化初始化權(quán)權(quán)值值W Wijij、W Wjkjk初始化輸入層和輸出層閾值初始化輸入層和輸出層閾值a a、b b1

2、()nji jijiHfxai=1,2n;j=1,2l1( )1xf xe1lkjjkkjOHbK=1,2m計(jì)算輸入層計(jì)算輸入層計(jì)算輸出層計(jì)算輸出層kkkeYOK=1,2m誤差計(jì)算誤差計(jì)算1(1) ( )mijijjjjkkkHHx iejkjkjkH ei=1,2n;j=1,2lj=1,2l;K=1,2m1(1)mjjjjjkkkaaHHekkkbbei=1,2n;j=1,2j=1,2l;K=1,2m權(quán)權(quán)值更新值更新閾值更新閾值更新確定隱含節(jié)點(diǎn)數(shù)確定隱含節(jié)點(diǎn)數(shù) 1ln()lmna2logln根據(jù)反復(fù)試算確定隱含節(jié)點(diǎn)數(shù)根據(jù)反復(fù)試算確定隱含節(jié)點(diǎn)數(shù)maxmaxminmax( )()/ttt附加動(dòng)量法調(diào)整權(quán)值附加動(dòng)量法調(diào)整權(quán)值變學(xué)習(xí)效率法變學(xué)習(xí)效率法( )(1)( )( ( )(1)kkkkk 實(shí)例分析實(shí)例分析-BP-BP識(shí)別語音信號(hào)識(shí)別語音信號(hào)訓(xùn)練數(shù)據(jù)類別訓(xùn)練數(shù)據(jù)類別實(shí)例分析實(shí)例分析-BP-BP識(shí)別語音信號(hào)識(shí)別語音信號(hào)各權(quán)值特征分布各權(quán)值特征分布實(shí)例分析實(shí)例分析-BP-BP識(shí)別語音信號(hào)識(shí)別語音信號(hào)訓(xùn)練次數(shù)與正確率訓(xùn)練次數(shù)與正確率實(shí)例分析實(shí)例分析-BP-BP識(shí)別語音信號(hào)識(shí)別語音信號(hào)分