Degree bu gaaw bu Nesterov
Degrade bu gaaw bu Nesterov (NAG) xeetu momentum la bu gëna am xel buy xool kanam balaa muy xayma degrade bi, diko jox gis-gis bu jub ci kanam.
Résumé
It often converges faster and more stably than classical momentum.
Plongeur bu xóot
Momentum classique dafay xayma degrade bi ci barab bimu nekk leegi, ba noppi yokk ci gaawaay biñ dajale. Li Nesterov gis, ci liggéeyu Yurii Nesterov ci 1983 ci gaawaayu optimaasioŋ convex, mooy njëkka jël jéego bu am doole bi dem ci barab bu ñuy xool kanam, ba noppi jàngat gradient bi foofu. Loolu dafay may optimisatër bi mu xam fi momentum bi koy yóbbu ba noppi def ci njuumte balaa muy overshooting, melni atlet bu gis courbe ci kanamam ba noppi teela jubbantiku moo gëna ginaaw. Ngir jafe-jafe convex yu nooy, anam wi Nesterov jëfandikoo dafay am tolluwaayu convergence bu baax bu tollu ci 1/k^2 ci limu jéego yi, muy gëna xéewale buñu mëna firnde ci wàccinu gradient bu 1/k. Ci jàngat bu xóot, dañu koy joxe muy tànneef bu yomb ci kaadar yu bari te dafay faral di joxe tuuti, tàggat yaram bu gëna néew oscillatoire bu gëna néew momentum standard ci benn koeffisien bi.
Gis-gis xarala
Seen wuutu bu mag mooy barab bi ñuy jàngat gradient bi. Momentum buñ miin dafay jëfandikoo degrade bi ci parametre yi fi nekk; Nesterov daf koy jàngat ci param yi ñuy xoole kanam, dindi ci njàng mi, dindi beta bi, gaawaay bi. Degrade bi ñuy waaja def dafay yokk njuumte bu méngoo ak coppite bi ci degrade bi, di damping overshoot ci wetu minima courbe. Ci jëf, kaadar yi dañuy amal benn yeesal buñ yamale ci algebra, suko defee njëg biy yokk ci momentum ordinaire bi amul benn njariñ.
njeextalu pexe
dogal yu gëna leer
Daf lay jàppale nga tàqale kàddu yu leer ci wàllu xarala ak làkku fësal njaay.
Njëgg ak budget
Mën nga laaj laaj yu gëna baax ci samp gi balaa ngay dugal xaalis wala sa jotu liggéey.
Ekip ak def liggéey
Ekip yi bokk xam-xam ñoo gëna mëna jël yenn dogal ci wàllu produit, politik ak jàng.
Ëlëgu gradient bu gaaw bu Nesterov
Nesterov momentum dafay nekk benn darapo buñ tabax ci biir PyTorch, TensorFlow, ak ñeneen, ak benn xeetu Nesterov bu Adam (Nadam) boole xool kanam ak eskalaasioŋ buy méngoo. Doxalinu gaawaayam mingi wéy di inspirer gëstu ci pexe momentum, tàmbaliwaat, ak jàngat li waral gaawaay di jàppale ci reso yu xóot yi amul convex. Xaarandi Nesterov-style look-ahead ngir des ci ab default bu bari ci praktisien yi topp gëna gaaw, gëna dëgër convergence.
Doxal ci àdduna dëgg
Aktiwise nesterov=Dëgg ci PyTorch wala TensorFlow SGD ngir tàggat bu gëna gaaw te neex.
Gaawaale ndaje ci jafe-jafe konveks yu nooy yu melni régresioŋ logistik bu mag.
Wàññi overshoot ak oscillation sooy tàggat reso yu xóot yi ci wetu minima yu ñaw yi.
Dafay doxal optimisatëru Nadam, biy yokk Nesterov xool kanam ci Adam.
Risk yi ak balustrade yi
Ekip yu bari mën nañu jëfandikoo benn baat ci anam wu wuute, kon teela leeral yaatuwaayam.
Benchmark yi mën nañu nuru lu am doole waaye performance yi ci àdduna bi duñu tolloo.
Bëgg kalite done ak palaŋu jàngat dafay faral di jur njariñ yu yomba dagg.
Roadmap ngir samp gi
Tàmbaleel ci joxe leeral ci làkk wu leer ci njariñ li nga soxla.
Tannal benn metric bu baax ak benn anam bu baaxul balaa ngay saytu.
Doxal ab pilote bu ndaw ak ay done yu representatif, du ab demo bu leer.
Bindal fi Nesterov Gradient bu gaaw di jàppale ak fi pexe yu gëna yomba gëna baax.
Weyal di banneexu
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Gis bi ci topp
Wàccig degrade
Laaj yi ñuy faral di laaj
What is Nesterov Accelerated Gradient?
Degrade bu gaaw bu Nesterov (NAG) xeetu momentum la bu gëna am xel buy xool kanam balaa muy xayma degrade bi, diko jox gis-gis bu jub ci kanam. Dafay faral di gëna gaaw di daje ak gëna dëgër momentum classique bi.
Lan mooy xalaat bi gëna fësal degrade bu gaaw bu Nesterov buñu ko méngale ak momentum bu yàgg bi?
Nesterov dafa njëkka jëfandikoo jéego momentum bi ngir yegg ci position xool kanam, ginaaw ga mu xayma gradient bi foofu, joxe ci njuumte bu njëkk.
Ban tolluwaayu konwergensi la anam wi Nesterov mëna am ci jafe-jafe konvex yu nooy yi?
Xeetu Nesterov bu gaaw bi defna 1/k^2 bu baax ngir objectif convex yu nooy, gëna gaaw ci wàccinu gradient 1/k.
Kan moo njëkka dugal xeetu gradient bu gaaw bii?
Yurii Nesterov siiwal na pexem degrade bu gaaw ci 1983 ngir gëna baaxal konvex.
Lan moo waral gradient biy xool kanam di jàppale ci wetu minima yu xawa sëgg yi?
Su Nesterov jàngatee gradient bi momentum bi di jaar, mën na teela saafara jafe-jafe yi ci momentum classique bi.
Ci jëf, naka la njëgu xayma bu momentum Nesterov di méngoo ak momentum classique bi?
Kadre yi dañuy tëral jëmmal buñ yamale suko defee Nesterov yokk njëg yu tuuti ci momentum bu bari bi.