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) , . , 3 gT s D d p D n ( h t M D ic ( ,, o C D b VL M V l e D

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121 ., 2 1. 4 1 1 1 1 1 .

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. , .,. . 5

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- . , , , A , , P , , N pyu gT NdCbaceI Apyu TskD A pyu whD , L A , , F if AM m pyu o lt n L C r 6 DATASET 1 DATASET 2 knowledge SYSTEM 1 SYSTEM 2

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. , CL M D F ! = #, % & n # n % & , 'ℎ)*) & = +, , … , +. ∈ # 0 = {2, % 3|& } n 2 n % 3|& , 'ℎ)*) 3 = 6, , … , 6. ∈ 2 , , , 7

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, . , D L C A S TA S T M L , S T S T , S T 8

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, /- / . . Fca S chi m n t Duhi m b a -/Ahi m hi m c eg / Ahi m o c eghi m a ed y / F l FA tC FTb ahi m y l c eghi m p . AM F ➤ ca y s b a c c eg c c eghi m l L C r 9

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- . - , T - -, cde hUb cU T t C de hTmM Tl b iL r T bgu M p v U n - -, Uoy“ cb n - - -, Uoy“ cb oySM cb n - -, A UoySM cb D C sn M C U T T U / - / - / - - 10

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. , .,. . 11

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-3 3 .2 13 , , ,.2 - o m s , ,.2 l r - - - - - e t ,- 3 1 , ,.2 n - - ai n - - I - e t 12 70 20 10 g

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. , .,. . M C C T L - 13 "! # !$ "

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1 A 42 4 3 t gdRNC RT M z t b M L mMC S L O . 2 4 C ,- D d r my 3 4 1 43Dusvcn -42 2 1 43Dlioh 1 43D ea - 14

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., . - he AMT R n cg nOdM iObl CD o n a M L M n .- n 15

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, , . , t gi yd lg !" c T L M s i n !# C h n lg n n t i t o n L b b L D n b L e 16

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, , . , n C N n M L n D A n 17 Classification loss domain loss M A DDC [1]

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. . - ,. n . n 5K 5 M ➤ 5 M 8 n DT D K L n T C K TKM n 3 4 n 3 4 1 - n 4 6 18 DAN 5C DF [2]

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. , . n n 19 JAN [3]

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. , . Dg e l D Cc n a C M D dl L T dlC M D dl h L C h D n ib 20 (a) ➤ (b) ➤ (c)CORAL (d) [4] ➤ (b) ➤ (c) CORAL [4]

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, M T LRD O n LR C C n . C A , 21 Covariance matrix % ("$ fc8*# '+ & ) [5] Classification loss domain loss ! i

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. , .,. . L L T M C L L C M 22

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. . ,. L G e T . i a b L G M h R n . d Cd g c 23 DANN [6]

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. 2 . nbTd S T L [ Tg d toc h E [ C sr le . , 1 Td Mf [ [ C , . , T A ] aMsr leTg S n A A n A n sr le d i . , 1 T A m 24 ADDA [7]

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. 25 M geh a hM M J i Tl oS b GJ L C LDK , . A dn N S GJec G N !"# = %&'()*(+)||. + )/%&'()0(+)||. + ) 1 2 3 = )*(+)/)0(+) 1 ➤ 2!"# = 5)6 log )*(+) )* + /)0(+) + 5)0 log )0(+) )* + /)0(+) + log 4 5+6~=* log ! ># 3# + 5+0~=0 log 1 − ! >A 3A

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. , . C LM D Dab TC . C - .1 - - . - .3 26

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. - leCgc f N T L h a i gc b , N T d n L mCgc b o M p n N T , C n 27 DRCN [8] Reconstruction loss Classification loss

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. , .,. . TM n ic TM t icL L s TM t Cn L n l TM t C TM n h gb !"#$$%&%'(% n TM TM n d gb !)#*#+,-. n L o L e !&%(/' 28 DSN [9]

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. , .,. . C T M C L L C - . 29 [10]

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,2 2 1 2 . b 1 2 2 T e d c a][ NL M C B 0 1 30

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,2 2 1 2 . C Mv tas n BLe N b M Dn Mc o T d T T Mr C 2 Mbg m i N b Mh A l Mbg 0 1 31 AdaBN [10]

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. ed , c a N L C T C M I Cb 1 1 1 32 BN IN [Y. Wu+, 2018] Style transfer [11] Content Style

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, . - , ovc -, -, gr I P T LM h C T L t dm n , , , e i asn , , L bl n M T - . 33

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2 2 . , N u Nl MnG Nn G g r , ci o N b T N j sd eA LC D M tu L h 2 1 2 34 CoGAN [12] [12]

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. , ba L D c e n L d A N G T hgC n M i DC . 35 DDiscriminator GGenerator TTask-specific model task-specific loss domain loss (GAN loss) PixelDA [13]

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+ 17 7 - 2 7 ui0 2 , . 0 n AG n [ ! " AG e #$ #% MN , bo n 2 2 7 2 s n [ AZc dLt n yN ] CN T ] h [ g n ] l 36 Cycle-consistency loss [Zhu+, 2017]

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- . . , , , , , A . D L NC T M D , , ,. G n FD , . . . S 37 !"#"$%$ = !'()* + !,$-. + !,$-/ + !0#0 + !,$-1 + !)23 Cycle GAN [14]

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. , .,. . - [14] GTA5 CityScapes

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. , . ➤ 5 G C A - [14]

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. , .,. . LC T M - .. - 40 {"# , % &' } "# % &'

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- - , - . - -, , n enL ml c ! !" , !$ sL !% n !" , !$ MU T dh rt gu bi n !" , !$ L Cpa voCfA DL dh rt n !% Mdh rt L uA bi 41 ATDA [15]

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. , .,. . 42 MMD DDC(2014) DAN(2015) JAN(2017) Adversarial DANN(2015) ADDA(2017) Reconstruction DRCN(2016) DSN(2016) Normalization AdaBN(2017) AdaIN(2017) Input-level CoGAN(2016) PixelDA(2017) CyCADA(2018) Pseudo-labelling ATDA(2017) CORAL CORAL(2016) DeepCORAL(2016)

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5 CJMJTY :FDIO M HJFS , 4TE A FF NBJO , O SJ O[ , . :ZFOH 2 0 NBO 6 IBOH 3 BFOL BOE : BRRFMM FF E NBJO D O SJ O 5BXJNJZJOH R E NBJO JOVBRJBODF 1O BR JV A FF EB TBTJ O 6FTW RL[ 6 5 4 OH ,B 2 BOH BOE 5 2 REBO 4FBROJOH TRBOS FRBCMF FBT RFS WJTI EFF BEB TBTJ O OFTW RLS 1O 1,54 A 2 JOT EB TBTJ O 6FTW RL[2 6 5 4 OH 2 BOH BOE 5 1 2 REBO FF TRBOS FR MFBROJOH WJTI K JOT BEB TBTJ O OFTW RLS 1O 1,54 A ,7 RFMBTJ O 4JHONFOT[,7 4 O 2 FOH BOE 3 BFOL FT RO R STRBTJOHMY FBSY E NBJO BEB TBTJ O 1O 1 A FF ,7 4 O BOE 3 BFOL FF D RBM , RRFMBTJ O BMJHONFOT R EFF E NBJO BEB TBTJ O 1O .,, W RLSI 43

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5 DKNKUY GEJP N IKGT , U A B - CKP WGSTCSKCN 6GVSCN 6GUX SMT[- 66 CPKP CP G RKUTMY PTVRGSWKTG CKP C CRUCUK P DY DCEMRS RCICUK P 1P 1,5 A B WGSTCSKCN -KTESK KPCUKWG - CKP CRUCUK P[ -- . ZGPI 2 0 HH CP 9CGPM CP -CSSGNN WGSTCSKCN KTESK KPCUKWG CKP C CRUCUK P 1P , 78 A B -GGR 8GE PTUSVEUK P ,NCTTKHKECUK P 6GUX SM[-8,6 5 JKHCSY NGKLP 5 JCPI - CN VZZK CP K -GGR SGE PTUSVEUK P ENCTTKHKECUK P PGUX SMT H S VPTVRGSWKTG CKP C CRUCUK P 1P .,, A B - CKP 9GRCSCUK P 6GUX SM[-96 VT CNKT SKIG SIKT 6 9KNDGS CP - SKTJPCP CP - .SJCP - CKP TGRCSCUK P PGUX SMT 1P 6GVS179 A B CRUKWG CUEJ 6 S CNKZCUK P[ C 6 K 6 CPI 2 9JK 2 KV CP 0 V 8GWKTKUKPI DCUEJ P S CNKZCUK P H S RSCEUKECN CKP C CRUCUK P 1P 1, 8 X SMTJ R 44

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7R MOMV[ IGL RORKMIU .R 6VH C D ,HESVMXI 3 UVE GI 8RTPEOM EVMR ],HE38 2 E K E H -IOR KMI ,T MVTET[ UV[OI VTE UJIT M TIEO VMPI YMVL EHESVMXI M UVE GI RTPEOM EVMR 3 3.. C D .R SOIH 1I ITEVMXI ,HXITUETMEO 8IVYRTN].R1,8 7 A 6M E H IO .R SOIH KI ITEVMXI EHXITUETMEO IVYRTNU 3 8I T3: C D :MZIO , 5 -R UPEOMU 8 MO ITPE RLE 0TLE E H 5TMUL E U SITXMUIH SMZIO OIXIO HRPEM EHESVEVMR YMVL KI ITEVMXI EHXITUETMEO IVYRTNU 3 . : C D .[., , 4 2RJJPE 0 I K :ETN 4 A BL : 3UROE 5 EI NR , 0JTRU E H ETTIOO .[GEHE .[GOI GR UMUVI V EHXITUETMEO HRPEM EHESVEVMR 3 3.76 C D , , 5 EMVR A ULMN E H 2ETEHE ,U[PPIVTMG VTM VTEM M K JRT U SITXMUIH HRPEM EHESVEVMR 3 3.76 45