ĈҤI HӐ&48Ӕ&GIA TP. HCM
TRѬӠNG ĈҤI HӐC BÁCH KHOA
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iii
ABSTRACT
In the current era, the amount of information from the Internet in general and the
electronic press in particular has increased rapidly and has extremely useful
information value in all aspects of life, leading to the exploitation of values from the
Internet. This news source to serve many purposes in society is increasingly interested
by people. This information can be personal blog posts, comments or autobiography
of an individual. However, most of these articles are often untitled, or will be assigned
by editors during compilation. With the goal of coming up with impressive titles,
often the author will choose words that never appear in the original passage, and this
is a huge challenge for previous techniques. Stemming from this need to
automatically title, we will introduce and proposed the PGN-LM model, a system
capable of automatically summarizing and titleing text. The architecture of the PGNLM model is built by combining modern natural language processing models, which
stands out for its ability to create impressive titles, with words that have never been
seen before appear in the original text. We tested our approach with real data and got
positive results, based on algorithmic automated evaluation and manual human
evaluation.
In this thesis, Chapter 1 will introduce an overview of the research topic, present the
reason for the birth of the PGN-LM model and introduce the problem of automatic
heading. Next, Chapter 2 will examine the research works related to this topic,
analyze the advantages and disadvantages of the approaches to come up with a
suitable solution for the problem. Chapter 3 will present the relevant theoretical
foundations used to build the PGN-LM system. Chapter 4 aims to present and analyze
the PGN-LM model in detail. Continuing with Chapter 5, we will show the process
of implementing the topic, including preparing the data set, and providing methods
to evaluate the accuracy of the PGN-LM model. And finally, a summary of the
obtained results and directions for further research will be presented in Chapter 6.
iv
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MӨC LӨC
1+,ӊ09Ө/8Ұ19Ă17+Ҥ&6Ƭ ...................................................................................... i
/Ӡ,&Ҧ0Ѫ1 ........................................................................................................................ii
7Ï07Ҳ7/8Ұ19Ă1 .......................................................................................................iii
ABSTRACT.......................................................................................................................... iv
/Ӡ,&$0Ĉ2$1 .................................................................................................................. v
0Ө&/Ө& ............................................................................................................................ vi
'$1+0Ө&&È& %Ҧ1* .................................................................................................viii
'$1+0Ө&&È&%,ӆ8ĈӖ+Î1+Ҧ1+ ........................................................................viii
'$1+0Ө&&È& 7Ӯ9,ӂ77Ҳ7 ...................................................................................... ix
&KѭѫQJ *,Ӟ,7+,ӊ8 ........................................................................................................ 1
1.1.
*LӟLWKLӋXÿӅWjL ....................................................................................................... 1
1.2.
0өFWLrXFӫDÿӅWjL .................................................................................................. 2
1.3.
3KҥPYLÿӅWjL .......................................................................................................... 2
&KѭѫQJ CÔNG TRÌNH LIÊN QUAN .............................................................................. 3
2.1.
&iFSKѭѫQJSKiSWyPWҳWFәÿLӇQ............................................................................ 3
2.2.
&iFSKѭѫQJSKiSWyPWҳWYӟLP{KuQK3RLQWHU*HQHUDWRU1HWZRUN ....................... 5
&KѭѫQJ .,ӂ17+Ӭ&1ӄ17Ҧ1* .................................................................................. 8
3.1.
Word Embedding .................................................................................................... 8
3.1.1. Mô hình Skip-Gram ........................................................................................... 10
3.1.2. Mô hình CBOW ................................................................................................ 11
3.2.
Mô hình Sequence-to-6HTXHQFHYjFѫFKӃ$WWHQWLRQ ........................................... 12
3.3.
Mô hình Pointer Generator Network..................................................................... 14
3.4.
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3.4.2. &iFKѭӟQJWLӃSFұQ ............................................................................................ 19
&KѭѫQJ 0Ð+Î1+Ĉӄ;8Ҩ7 ....................................................................................... 20
4.1.
*LӟLWKLӋXWәQJTXDQ .............................................................................................. 20
vi
4.2.
.LӃn trúc mô hình PGN-LM ................................................................................. 21
4.2.1. 7LӅQ[ӱOêGӳOLӋX .............................................................................................. 21
4.2.2. Mô hình Pointer Generator Network ................................................................. 22
4.2.3. 0{KuQKQJ{QQJӳ ............................................................................................. 22
&KѭѫQJ +,ӊ17+Ӵ&9¬ĈÈ1+*,È .......................................................................... 26
5.1
7ұSGӳOLӋX ............................................................................................................ 26
5.2
.ӃWTXҧKXҩQOX\ӋQ................................................................................................ 28
5.3
3KѭѫQJSKiSÿiQKJLi ........................................................................................... 29
5.4
.ӃWTXҧWKӵFQJKLӋP ............................................................................................. 31
5.5
ĈiQKJiá ................................................................................................................ 32
5.5.1. ĈiQKJLiWӵÿӝQJ ............................................................................................... 32
5.5.2. ĈiQKJLiYӟLFRQQJѭӡL ..................................................................................... 34
&KѭѫQJ 7Ә1*.ӂ7 ....................................................................................................... 37
6.1.
.ӃWOXұQ ................................................................................................................. 37
6.2.
HѭӟQJPӣUӝQJFӫDÿӅWjL ..................................................................................... 37
7¬,/,ӊ87+$0.+Ҧ2 ................................................................................................... 39
3+Ҫ1/é/ӎ&+75Ë&+1*$1* ..................................................................................... 42
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DANH MӨC CÁC BҦNG
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%ҧQJ%ҧQJNӃWTXҧÿiQKJLiWtQKKӧSOê ...............................................................35
%ҧQJ%ҧQJNӃWTXҧÿiQKJLiWtQKNKҧWKL ..............................................................36
viii
DANH MӨC CÁC BIӆ8ĈӖ HÌNH ҦNH
+uQK7LrXÿӅEjLYLӃWÿѭӧFWzDVRҥQÿһW .................................................................1
+uQK9tGөFiFWӯÿѭӧFELӇXGLӉQEҵQJ:RUG9HF ................................................8
+uQK0LQKKӑD NLӃQWU~F:RUG9HF ......................................................................9
+uQK9tGөWӯPөFWLrXYjWӯQJӳFҧQK .................................................................10
+uQK6ѫÿӗPLQKKӑD6NLS-Gram .........................................................................10
+uQK6ѫÿӗPLQKKӑD&%2: ...............................................................................11
Hình 7.LӃQWU~FP{KuQK6HT6HTWUX\ӅQWKӕQJ ....................................................12
+uQK.LӃQWU~FP{KuQK6HT6HTNӃWKӧSYӟLFѫFKӃ$WWHQWLRQ ..........................14
+uQK9tGөFiFKWҥRUD&RS\$WWHQWLRQ'LVWULEXWLRQ ............................................15
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+uQK+uQKҧQKWKDQKWuPNLӃPWUrQ*RRJOH........................................................18
+uQK.LӃQWU~FWәQJTXDQFӫDP{KuQK3*1-LM...............................................20
+uQK3KѭѫQJSKiSKXҩQOX\ӋQP{KuQKQJ{QQJӳ .............................................23
+uQK6ӱGөQJP{KuQKQJ{QQJӳÿӇVӱDOӛLQJӳSKiS .......................................24
+uQK9tGөVӱGөQJP{KuQKQJ{QQJӳVӱDOӛLQJӳSKiS ...................................25
+uQK7ұSGӳOLӋX$PD]RQ)LQH)RRG .................................................................26
+uQK7ұSGӳOLӋXEәVXQJ ....................................................................................27
+uQK9tGөWLrXÿӅÿѭӧFVLQKUDYӟLP{KuQK%DVH-Seq2Seq .............................28
+uQK9tGөWLrXÿӅÿѭӧFVLQKUDYӟLP{KuQK3*1-LM .....................................29
+uQK9tGөFiFKWtQKÿLӇP%/(8FKRPӝWFkXWLrXÿӅ .......................................33
+uQK&iFKWtQKÿLӇP%/(8FKRPӛLP{KuQK ...................................................33
+uQK9tGөPүXÿiQKJLiFӫDFiFWuQKQJX\ӋQYLrQ ...........................................34
+uQK&iFKWtQKÿLӇPKӧSOêFӫD mô hình ...........................................................35
+uQK&iFKWtQKÿLӇPNKҧWKLFӫDP{KuQK ..........................................................35
ix
DANH MӨC CÁC TӮ VIӂT TҲT
*LҧL7KtFK
TKXұWQJӳ
NLP
Natural Language Processing
LSTM
Long Short-Term Memory
CBOW
Continuous Bag-of-Words
RNN
Recurrent Neural Network
PGN
Pointer Generator Network
LM
Language Model
OOV
Out-Of-Vocabulary
UNK
Unknown Token
Seq2Seq
Sequence-to-Sequence
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Qj\WLrXÿӅQj\NKiOjҩQWѭӧQJYuWKӇKLӋQÿѭӧFPӝWWURQJQKӳQJF{QJGөQJFӫD
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WKuWLrXÿӅ*L̫PEpR FNJQJUҩWWKtFKKӧSYjҩQWѭӧQJPһFGKRjQWRjQNK{QJ[XҩW
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Yұ\WKuÿk\OjQKXFҫXFyWKұWYuYұ\[XҩWSKiWWӯQKXFҫXWӵÿӝQJÿһWWLrXÿӅQj\
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KӋWKӕQJQj\WLrXÿӅVӁÿѭӧFWҥRUDWӵÿӝQJWURQJWKӡLJLDQQJҳQYjYүQÿҧPEҧR
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1
1.2.
Mөc tiêu cӫDÿӅ tài
0өFWLrXFӫDÿӅWjLQj\OjWuPKLӇXYj[k\GӵQJPӝWKӋWKӕQJFyNKҧQăQJWӵÿӝQJ
ÿһWWLrXÿӅFKRÿRҥQYăQ%ѭӟFÿҫXWLrQVӁiSGөQJFiFNӻWKXұWKLӋQÿҥLWURQJ;ӱ/ê
1J{Q1Jӳ7ӵ1KLrQ1/3ÿӇKXҩQOX\ӋQP{KuQKWӵÿӝQJÿһWWLrXÿӅFKRÿRҥQYăQ
WURQJÿyQәLEұWYӟLNKҧQăQJWҥRUDFiFWLrXÿӅҩQWѭӧQJFyFKӭDQKӳQJWӯFKѭDEDR
JLӡ[XҩWKLӋQWURQJÿRҥQYăQJӕF&iFWӯQj\FyWKӇOjFiFGDQKWӯULrQJÿѭӧFWiFJLҧ
ÿѭDWKrPYjRÿӇWăQJVӵҩQWѭӧQJFKRWLrXÿӅ%ѭӟFWLӃSWKHRVӁKXҩQOX\ӋQPӝWP{
KuQKQJ{QQJӳÿӇVӱDOӛLQJӳSKiSFKRFiFWLrXÿӅWӵÿӝQJQj\&XӕLFQJFK~QJW{L
WKӵFKLӋQYLӋFÿiQKJLiWKHRFҧSKѭѫQJSKiSOjÿiQKJLiWӵÿӝQJ YjÿiQKJLiYӟL
FRQQJѭӡL
7әQJTXiWOҥLPөFWLrXFӫDÿӅWjLEDRJӗP
x ĈӅ[XҩWYj[k\GӵQJPӝWP{KuQKFyNKҧQăQJWҥRWLrXÿӅWӵÿӝQJWӯSKҫQYăQ
EҧQ JӕF FӫD Qy &ө WKӇ WURQJ OXұQ YăQ Qj\ Oj Gӳ OLӋX YӅ FiF ÿiQK JLi WKӵF
SKҭP
x ;k\GӵQJPӝWP{KuQKQJ{QQJӳFyNKҧQăQJVӱDOӛLQJӳSKiSFKRFiFWLrX
ÿӅÿѭӧFWҥRUDWӵÿӝQJQj\
x 7KӵFKLӋQYLӋFÿiQKJLiP{KuQKWKHRSKѭѫQJSKiSOjÿiQKJLiWӵÿӝQJYj
ÿiQKJLiYӟLFRQQJѭӡL
1.3.
PhҥPYLÿӅ tài
ĈӅWjLQj\WұSWUXQJYjRYҩQÿӅQJKLrQFӭXVDX
x 1JKLrQFӭXYj[k\GӵQJPӝWP{KuQKFyNKҧQăQJWҥRWLrXÿӅWӵÿӝQJWӯYăQ
EҧQJӕF7ұSGӳOLӋXÿѭӧFVӱGөQJOjFiFÿiQKJLiYӅWKӵFSKҭPWUrQ$PD]RQ
x ;k\GӵQJP{KuQKQJ{QQJӳYӟLPөFÿtFKVӱDOӛLQJӳSKiSFKRFiFWLrXÿӅWӵ
ÿӝQJQj\0{KuQKQJ{QQJӳQj\FҫQÿѭӧFKXҩQOX\ӋQYӟLPӝWWұSGӳOLӋXOӟQ
KѫQWәQJTXiWKѫQVRYӟLWұSGӳOLӋXWUѭӟFÿy
2
&KѭѫQJ
CÔNG TRÌNH LIÊN QUAN
7KHRVӵNKҧRViWFӫDFK~QJW{LWURQJQKӳQJQJKLrQFӭXJҫQÿk\FK~QJW{LWuPWKҩ\
WKuKLӋQQD\FKѭDFyPӝWQJKLrQFӭXQjRWKұWVӵJLҧLTX\ӃWÿ~QJEjLWRiQÿһW WLrXÿӅ
FKRYăQEҧQ9uYұ\WURQJQJKLrQFӭXFӫDFK~QJW{LFK~QJW{LWKҩ\QJKLrQJҫQQKҩW
OjEjLWRiQWyPWҳWYăQEҧQ'RÿyFK~QJW{LVӁQJKLrQFӭXFiFSKѭѫQJSKiSÿyYj
ӭQJGөQJYұQGөQJFKREjLWRiQFӫDPuQK7URQJQKӳQJSKѭѫQJSKiSÿyOjFKLDUD
WұS KXҩQOX\ӋQEDRJӗPQӝLGXQJÿҫ\ÿӫYjSKҫQWyPWҳWFӫDQy7KuFK~QJW{LVӁ
QJKLrQFӭXFiFSKѭѫQJSKiSQj\YjYұQGөQJOҥLWKjQKEjLWRiQFӫDFK~QJW{LFNJQJ
KXҩQOX\ӋQQKѭQJWKD\YuOjQӝLGXQJÿҫ\ÿӫIXOO-WH[WYjWyPWҳWVXPPDU\WKuVӁ
OjQӝLGXQJ ÿҫ\ÿӫIXOO-WH[WYjWLrXÿӅWLWOH7ӯÿyFK~QJW{LU~WWUtFKUDFiFWLrXÿӅ
QJҳQJӑQYҳQWҳWFKRPӝWYăQEҧQGjL&yWKӇWKҩ\EjLWRiQWӵÿӝQJÿһWWLrXÿӅFӫD
FK~QJW{LFyWKӇÿѭӧF[HPOjPӝWWUѭӡQJKӧSFөWKӇFӫDEjLWRiQWyPWҳWYăQEҧQ
2.1.
&iFSKѭѫQJ pháp tóm tҳt cә ÿLӇn
ĈӕL YӟL FiF SKѭѫQJ SKiS WyP WҳW Fә ÿLӇQ WKHR QKѭ QJKLrQ FӭX ³$XWRPDWLF
VXPPDUL]LQJWKHVWDWHRIWKHDUW´ >@YjRQăPQKyPWiFJLҧWUuQKEj\FyKDL
SKѭѫQJSKiSÿӇJLҧLTX\ӃWYҩQÿӅWyPWҳWYăQEҧQEDRJӗPSKѭѫQJSKiSWyPWҳWWUӯX
WѭӧQJabstraction methodYjSKѭѫQJSKiSWyPWҳWWUtFK[XҩWextraction method):
x 3KѭѫQJSKiSWyPWҳWWUӯXWѭӧQJéWѭӣQJFӫDSKѭѫQJSKiSWyPWҳWWUӯXWѭӧQJ
OjFӕJҳQJKLӇXQJӳFҧQKFӫDWRjQEӝYăQEҧQVDXÿyWҥRUDPӝWEҧQWyPWҳW
PӟLGӵDWUrQQӝLGXQJYjSKRQJFiFKFӫDYăQEҧQJӕFYӟLQKӳQJWӯKRjQWRjQ
PӟL9uYұ\FiFKWLӃSFұQQj\JLӕQJYӟLFiFKKRҥWÿӝQJFӫDFRQQJѭӡLKѫQ
ÿLӅXQj\NKyWKӵFKLӋQYuQyJLӕQJYӟLYLӋFYLӃWOҥLFiFFkXPӟLPӝWFiFKWKӫ
F{QJ'RÿyFiFSKѭѫQJSKiSWyPWҳWYăQEҧQWKHRKѭӟQJWUӯXWѭӧQJVӁ[k\
GӵQJPӝWPҥQJ1ѫ-URQÿӇKXҩQOX\ӋQFiFPӕLTXDQKӋJLӳDÿҫXYjRYjÿҫX
UDSKѭѫQJSKiSQj\NK{QJFKӍÿѫQWKXҫQOjVDRFKpSFiFWӯWURQJYăQEҧQJӕF
PjOjVLQKUDFiFFөPWӯFkXYăQPӟLQJҳQJӑQV~FWtFKPjYүQWKӇKLӋQ
ÿѭӧFQӝLGXQJFӫDYăQEҧQJӕFQKѭFiFKFRQQJѭӡLWKӵFKLӋQFyWKӇWҥRQrQ
FiFEҧQWyPWҳWWӵQKLrQҩQWѭӧQJKѫQ5ҩWQKLӅXQJKLrQFӭXÿmÿѭӧFWKӵF
KLӋQGӵDWUrQêWѭӣQJFӫDSKѭѫQJSKiSQj\FyWKӇNӇÿӃQQKѭ³$EVWUDFWLYH
and extractive text summarization using document context vector and
UHFXUUHQWQHXUDOQHWZRUNV´ >@QKyPWiFJLҧFKӭQJPLQK[k\GӵQJP{KuQK
WyPWҳWFKRYăQEҧQGӵDWUrQQӝLGXQJVӱGөQJP{KuQK6HTXHQFHWRVHTXHQFH
3
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QJҳQ Yj YăQ EҧQ GjL 7URQJ EjL EiR ³*HQHUDWLQJ QHZV KHDGOLQHV ZLWK
UHFXUUHQWQHXUDOQHWZRUNV´ >@FiFWiFJLҧP{WҧPӝWӭQJGөQJFӫDP{KuQK
6HT6HTYӟLFiFQ~WPҥQJ%ӝQKӟQJҳQGjLKҥQ/670NӃWKӧSYӟLFѫFKӃFK~
êÿӇWҥRWKjQKP{KuQKVLQKUDGzQJWyPWҳWQәLEұWWӯQӝLGXQJFiFEjLEiR
0{KuQKQj\WҥRUDPӝWEҧQWyPWҳWQJҳQJӑQKӧSOӋYjÿ~QJQJӳSKiS+D\
WURQJ QJKLrQ FӭX ³$EVWUDFWLYH DQG ([WUDFWLYH 7H[W 6XPPDUL]DWLRQ XVLQJ
'RFXPHQW&RQWH[W9HFWRUDQG5HFXUUHQW1HXUDO1HWZRUNV´ >@WiFJLҧÿӅ[XҩW
PӝWP{KuQK[k\GӵQJYHFWRUQJӳFҧQKYăQEҧQNӃWKӧSYӟLP{KuQKKӑFVkX
6HT6HTÿӇJLҧLTX\ӃWEjLWRiQWyPWҳWYăQEҧQ&iFNӃWTXҧWKӵFQJKLӋPFӫD
EjLEiRFKRWKҩ\YLӋFiSGөQJP{KuQK[k\GӵQJYHFWRUQJӳFҧQKNӃWKӧSYӟL
P{KuQKKӑFÿmÿҥWÿѭӧFFiFNӃWTXҧ NKҧTXDQFKRFҧYăQEҧQQJҳQYjGjL
Ĉk\OjPӝWYtGөPLQKKRҥFKRNӃWTXҧWyPWҳWYăQEҧQYӟLSKѭѫQJSKiSWUӯX
WѭӧQJ
o 9ăQEҧQJӕF$WLV{OjORҥLWKӵFYұWFyKjPOѭӧQJFKҩWFKӕQJR[\KyD
FDRQKҩWWURQJWҩWFҧFiFORҥLUDX$WLV{FyFKӭDQKLӅX9LWDPLQ&
o 9ăQEҧQWyPWҳW$WLV{FyQKLӅX9LWDPLQFNJQJQKѭFKҩWFKӕQJR[\
hóa.
ѬXÿLӇPFӫDSKѭѫQJSKiSWyPWҳWWKHRKѭӟQJWUӯXWѭӧQJOjFyNKҧQăQJWҥR
UDYăQEҧQWyPWҳWKD\KѫQFyYăQSKRQJWӵQKLrQJLӕQJYӟLFiFKYLӃWFӫD
FRQQJѭӡLKѫQ7X\QKLrQSKѭѫQJSKiSQj\FҫQ\rXFҫXVӱGөQJFiFJLҧLWKXұW
KӑFVkXSKӭFWҥSWӕQWKӡLJLDQKXҩQOX\ӋQ
x 3KѭѫQJ SKiS WyP WҳW WUtFK [XҩW 7UiL QJѭӧF YӟL SKѭѫQJ SKiS WyP WҳW WUӯX
WѭӧQJêWѭӣQJFӫDSKѭѫQJSKiSQj\OjFKӑQFiFFөPWӯFkXYăQTXDQWUӑQJ
QKҩWWURQJÿRҥQYăQJӕFVDXÿyWәQJKӧSOҥLYjWҥRUDPӝWEҧQWyPWҳW9uYұ\
WURQJSKѭѫQJSKiSQj\PӑLFөPWӯYjFkXYăQFӫDEҧQWyPWҳWÿӅXWKXӝFYăQ
EҧQJӕF7URQJSKѭѫQJSKiSQj\FyWKӇNӇÿӃQPӝWVӕQJKLrQFӭXQKѭNew
methods in automatic abstracting. Journal of ACM´[5], các tiFJLҧQJKLrQ
FӭXJLDLÿRҥQÿҫXWKѭӡQJVӱGөQJFiFÿһFWUѭQJQKѭYӏWUtFӫDFkXWURQJYăQ
EҧQWҫQVӕ[XҩWKLӋQFӫDWӯQJӳKD\VӱGөQJFiFFөPWӯNKyDÿӇWtQKWRiQ
WUӑQJVӕFӫDPӛLFkXTXDÿyFKӑQUDFiFFkXFyWUӑQJVӕFDRQKҩWFKRYăQEҧQ
WyP WҳW +D\ WURQJ QJKLrQ FӭX ³*UDSK-based centrality as salience in text
VXPPDUL]DWLRQ-RXUQDORI$UWLILFLDO,QWHOOLJHQFH5HVHDUFK´[6]WiFJLҧWUuQK
Ej\JLҧLWKXұWWH[W5DQNPӝWJLҧLWKXұWOҩ\êWѭӣQJWӯWKXұWWRiQ3DJH-UDQNÿӇ
4
[k\GӵQJÿӗWKӏWKӇKLӋQPӕLTXDQKӋYӅ ÿӝWѭѫQJWӵFӫDFiFFkXYăQWӯÿy
WtQKÿӝTXDQWUӑQJFiFWKjQKSKҫQWURQJYăQEҧQYjWәQJKӧSFiFFkXYăQFy
ÿLӇPFDRQKҩWWKjQKYăQEҧQWyPWҳW +RһFWURQJQJKLrQFӭX [7]QKyPWiFJLҧ
ÿѭDUDPӝWVӕSKѭѫQJSKiSYӟLPөFWLrX[iFÿӏQKFiFSKҫQTXDQWUӑQJ(câu,
ÿRҥQYăQFӫDYăQEҧQYjÿѭDUDWyPWҳW7ҫPTXDQWUӑQJFӫDFiFSKҫQÿѭӧF
WUtFK[XҩWWKѭӡQJÿѭӧFTX\ӃWÿӏQKGӵDWUrQFiFÿһFÿLӇPWKӕQJNrYjQJ{QQJӳ
FӫDFkX
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[XҩW
o 9ăQEҧQJӕF$WLV{OjORҥLWKӵFYұWFyKjPOѭӧQJFKҩWFKӕQJR[\KyD
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o
9ăQEҧQWyPWҳW$WLV{FyFKҩWFKӕQJR[\KyD$WLV{Fy9LWDPLQ.
ѬXÿLӇPFӫDSKѭѫQJSKiSQj\OjÿѫQJLҧQGӇWKӵFKLӋQWX\QKLrQYăQEҧQ
WyPWҳWWKѭӡQJWKLӃXPҥFKOҥFWӵQKLrQ7RjQEӝFiFFkXWӯWURQJYăQEҧQWyP
WҳWÿӅXQҵPWURQJÿRҥQYăQJӕF.
2.2.
&iFSKѭѫQJSKiSWyPWҳt vӟi mô hình Pointer Generator
Network
7URQJFiFF{QJWUuQKQJKLrQFӭXWUrQSKѭѫQJSKiSWyPWҳWWUӯXWѭӧQJOj SKKӧS
YӟLEjLWRiQWӵÿӝQJÿһWWLrXÿӅFӫDFK~QJW{LFyNKҧQăQJSKiWKX\ÿѭӧFQKLӅXWKӃ
PҥQKNKLVLQKUDYăQEҧQPӟLQJҳQJӑQV~FWtFKWKӇKLӋQÿѭӧFFiFêFKtQKFӫDYăQ
EҧQJӕFEҵQJFiFWӯQJӳOLQKKRҥW7X\QKLrQPӝWQKѭӧFÿLӇPFӫDFiFSKѭѫQJ
pháp Qj\OjÿӕLYӟLFiFWӯQҵPQJRjLWӯÿLӇQ2XW-Of-9RFDEXODU\WKuKҫXQKѭ
NK{QJWKӇJLҧLTX\ӃWÿѭӧF9uYұ\P{KuQK3RLQWHU*HQHUDWRU1HWZRUNÿѭӧFWҥRUD
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QJKLrQFӭX³*HW7R7KH3RLQW6XPPDUL]DWLRQZLWK3RLQWHU-Generator Networks
[8], trong nghiêQFӭXQj\WiFJLҧÿӅ[XҩWPӝWNLӃQWU~FPӟLÿӇWăQJFѭӡQJP{KuQK
WUX\ӅQWKӕQJ6HT6HTĈҫXWLrQKӑVӱGөQJPӝWPҥQJWҥRFRQWUӓPGN FyWKӇVDR
FKpSFiFWӯWURQJYăQEҧQQJXӗQJL~SKӛWUӧWiLWҥRWK{QJWLQFKtQK[iFWURQJNKL
5
YүQJLӳÿѭӧFNKҧQăQJWҥRUDFiFWӯPӟLWK{QJTXDWUuQKWҥRgenerator7KӭKDL
KӑVӱGөQJFѫFKӃ&RYHUDJHÿӇWKHRG}LQKӳQJJuÿmÿѭӧFWyPWҳWJL~SJLҧPEӟW
YLӋFOһSOҥLWӯWURQJTXiWUuQKWyPWҳW7URQJQJKLrQFӭX>@FiFWiFJLҧVӱGөQJ
PҥQJ3RLQWHU*HQHUDWRU1HWZRUNYӟLPөF ÿtFKWyPWҳWFiFFXӝFKӝLWKRҥL7K{QJ
WKѭӡQJYLӋFWyPWҳWFiFFXӝFKӝLWKRҥLtWÿѭӧFFK~êKѫQVRYӟLWyPWҳWYăQEҧQ
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GӵQJFKѭѫQJWUuQKKӑFYӟLPөFÿtFKWUtFK[XҩWWK{QJWLQWӯFiFYăQEҧQOӟQFKR
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ÿѭӧFFҧLWLӃQÿӝÿR%/(8-OrQYjÿӝÿR5RXJH-/OrQ7URQJQJKLrQFӭX
[11], các WiFJLҧÿӅ[XҩWP{KuQKFyWrQ.*7(;7PӝWP{KuQKFKӭQJPLQKPҥQJ
3RLQWHU*HQHUDWRU1HWZRUNWKӇKLӋQKLӋXVXҩWYѭӧWWUӝLWURQJFiFWiFYөWҥRQJ{Q
QJӳWӵQKLrQFKҷQJKҥQYLӋFP{WҧWӵÿӝQJFKRFiFWKӵFWKӇWURQJ6˯ÿ͛WULWKͱF
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