: 5 . . 5: 5 / : 0 /. 1 0 . 5
TRANSCRIPT
: 5 . . 5: 5 /: 0 /. 1 0 . 5
-5 : 5 CT T
? V]TWPOTL 6 W ]T R LM DP WT G T P[ T]b Q 6ST L
*(). (1 )- B6? *().
lixirong.net 1
? V]TWPOTL ?PP] L R LRP
• WLRP NL ]T T R T ] L ] WL]TNLVVb RP P[L]P L . ? . . ?.P ]P NP ]SL] OP N[TMP .5 P ]T]TP L O P P ] T L RT P TWLRP&
����������F O R VLbT R MPLNS
VTaT[ R& P] *
E]L]P Q ]SP 4[] WLRP 6L ]T T R
• : RVPf ES L O FPVV W OPVJHT bLV 6HBD*()-
• WLRP P N OT R Mb 6 L O P ]P NP OPN OT R Mb EF?
http://colah.github.io/posts/2015-08-Understanding-LSTMs/
R ES [] FP[W ?PW [b EF? T]
VTaT[ R& P] +
7L]L T 5PN WT R L 5 ]]VP PNU 4RLT
• 7P PV WP ] Q TWLRP P ]P NP N [ [L
9VTNU[0U
. . 0.
.*()+ *(), *()- *().
9VTNU[+(U
?E6A6A
HT LV:P WP
*()/ d
)(U
)-(U
VTaT[ R& P] ,
A [ ? ]T P
• ?L b W [P 0: 0 L ]L]T ]SL 0 L ]L]T• / WTVVT ST] SP PL[NST R Q [ eO Rf ]SP 9VTNU[ PM T]P• ?L b T LV N NP ] NL MP PQQPN]T PVb [POTN]PO
• 6L P ]TVTcP T P N NP ] VP PV L ]L]T Q [ TWLRP NL ]T T R3
VTaT[ R& P] -
A [ B[ LV
• W [ T R EAF4 Mb N NP ] ML PO P ]P NP [P[L UT R
VTaT[ R& P] .
EP ]P NP DP DL UT R
• DP N W ]P P ]P NP N [P T ]P[W Q N NP ] OP]PN]T [P V]
PTRS] P ]EN [P Sb EP ] ) PTRS] N NP ]EN [P Sb EP ]
• Sb EP ]2 L NL OTOL]P P ]P NP [POTN]PO Mb ]SP EF? W OPV• P ]EN [P Sb EP ] 2 T T]TLV N [P• N NP ]EN [P Sb EP ] 2 L P[LRPO N [P Q N NP ] Q O T ]SP Sb EP ]
VTaT[ R& P] /
EP ]P NP DP DL UT R2 DPLV 8aLW VP
VTaT[ R& P] 0
EP ]P NP DP DL UT R2 DPLV 8aLW VP
VTaT[ R& P] 1
? OPV Q [ 6 NP ] 7P]PN]T
• PTRSM [ ]T R PTH ]P J T F??*((1
• 6 ] TWLRP PTRSM [ VLMPVPO T]S L PNTQTN N NP ]
T P] LV& E NTLVTcT R ]SPPWL ]TN RL 2 4 N W L[L]T P[ Pb TWLRP ]LR L TR WP ]
[PQT PWP ] L O [P][TP LV 46?6 W ]T R E [ Pb *().
VTaT[ R& P] )(
? OPV Q [ 6 NP ] 7P]PN]T
• TP[L[NSTNLV EPWL ]TN 8WMPOOT R TP[E8 J T E : D*()-
• 6 W ]P TWLRP N NP ] [PVP L NP T L I [O*HPN LNPJ?TU V BE*()+
• 9L ]P[ ]SL PTH ]P
VTaT[ R& P] ))
8 LV L]T
• WLRP6 89 *()- WLRP EP ]P NP :P P[L]T FL UJ:TVMP[] 6 89*()-
• 4 OP P] Q *U TWLRP T]S WL LVVb [T]]P NL ]T• - ] -) NL ]T P[ TWLRP
• BL[]TNT L ] P[P L UPO ] [POTN] NL ]T Q [ PM TWLRP• FSP [RL TcP[ PVPN] L M P] Q + (/( TWLRP STNS P O ] U Q [ ]P ]• W TMVP ] WL LVVb ] P Q [ gR Oh P[Q [WL NP
• 8 LV L]T N[T]P[T• ?8F8AD
VTaT[ R& P] )*
DP V]
• BP[Q [WL NP Q [ b ]PW OP[ L[TPO P]]T R
ML PVT P à
VTaT[ R& P] )+
DP V]
• 6 W L[T R T]S ]SP[ MWT T T WLRP6 89 *()-• A [ [ L[P S T N V [ ML[
VTaT[ R& P] ),
8a]P T ] ]SP TOP O WLT
• 6 NP ] ML PO P ]P NP [P[L UT R LV [U Q [ TOP NL ]T T R
7 R P] LV& 8L[Vb PWMPOOT R L O VL]P [P[L UT R Q [ TOP NL ]T T R 46? ? V]TWPOTL *().
VTaT[ R& P] )-
6 NV T
• 6 NP ] ML PO P ]P NP [P[L UT R T SPV Q V• :T P [ P[ N NP ] OP]PN]T NLM VL[b W OPV d
• W [ P TWLRP NL ]T T R T]S Pa][L N ] Q WL LV L ]L]T• PL[ T R Q[ W 9VTNU[ TWLRP
• IT T R P ][b T WLRP6 89 *()-
VTaT[ R& P] ).
7PW 2 WLRP NL ]T T R T 6ST P P
5 ? 0: 5 0.
VTaT[ R& P] )/