Hoos-u-dhaca Stochastic Gradient oo leh Momentum
Momentum waa habayn lagu soo degayo gradient taaso uruurisa celceliska ordaya ee gradients ee hore, taasoo u ogolaanaysa tayaynta inay si dhakhso leh ugu dhex wareegto dooxooyinka oo ay qoyaan rogrogmada.
Dulmar
It is one of the most widely used training tricks in deep learning.
quusid qoto dheer
Faraca stochastic stochastic gradient (SGD) wuxuu cusboonaysiiyaa cabbirada isagoo u tallaabaya jihada ka soo horjeeda gradient-yar oo hadda jira. Muuqaallada u qaabaysan dooxooyin dhaadheer oo cidhiidhi ah, zigzag-gan ayaa ka gudba gidaarada dhaadheer marka ay gurguuranayaan sagxada dabacsan. Momentum, oo uu caan baxay Polyak iyo markii dambe Rumelhart iyo asxaabtiisa, ayaa tan ku hagaajiya iyada oo la ilaalinayo xawaaraha xawaaraha: tillaabo kasta waxay ku dhex dartaa jaantuska cusub iyo jajab (isugeynta xawaaraha, badiyaa 0.9) ee xawaarihii hore. Tilmaamaha is daba joogga ah ee joogtada ah waxay xoojiyaan oo ay dardargeliyaan, iyada oo qaybaha gawaadhida ay qayb ahaan baabi'inayaan. Isbarbardhigga jireed waa kubad culus oo hoos u soo rogeysa: waxay ku dhistaa xawaaraha jihooyin joogto ah oo ay ka yar tahay kuuskuuska buuqa badan, taasoo siinaysa isku xirnaan ka dhakhso badan, ka siman marka loo eego vanilj SGD.
Aragtida Farsamada
Cusboonaysiinta ayaa ilaalinaysa xawaaraha v ee la cusboonaysiiyay sida v = beta * v + gradient, ka dibna cabbiradu waxay dhaqaaqaan iyadoo laga jaray heerka waxbarashada v. Iyada oo la adeegsanayo isbarbardhigga beta, tillaabada waxtarka leh ee jihada joogtada ah waxaa lagu xoojiyay qiyaas ahaan 1/(1 - beta); beta = 0.9 oo ah qiyaastii toban jeer. Kani waa xisaab ahaan celcelis dhaqdhaqaaq dhaqaaq ah oo miisaan culus leh, oo hagaajinaya buuqa dufcada yar iyadoo la ilaalinayo jihada faraceeda ugu weyn.
Saamaynta Istiraatijiyadeed
Go'aamo cad
Waxay kaa caawinaysaa inaad kala saartid sheegashooyinka farsamada cad iyo luqadda suuq-geynta.
Qiimaha iyo miisaaniyada
Waxaad waydiin kartaa su'aalo fulineed oo wanaagsan ka hor inta aadan lacag ama waqti bixin.
Kooxda iyo socodka shaqada
Kooxaha fahamka la wadaago waxay sameeyaan wax soo saar, siyaasad, iyo go'aano waxbarasho oo wanaagsan.
Mustaqbalka Hoos-u-dhaca Gradient Stochastic oo leh Hawl-qabad
Dhaqdhaqaaqa ayaa weli ah aasaaska: hagaajinta la qabsiga sida Adam iyo kala duwanaanshaheeda waxay ku duugan yihiin qiyaasta daqiiqada koowaad ee qaabka dardargelinta, iyo SGD oo leh firfircooni weli waa aasaas xooggan oo inta badan si ka wanaagsan hababka la qabsiga ee qaababka aragga waaweyn. Cilmi-baadhistu waxay ku socotaa jadwalka xawliga ah, qudhunka miisaanka oo go'ay, iyo la macaamilka tababarka dufcaddii aadka u ballaaran. Filo in xawligu sii ahaado qayb xudunta u ah sida wax u hagaajiya ay u kobcayaan moodooyinka weligood waaweyn.
Dhaqangelinta Adduunka-dhabta ah
Tababarka shabakadaha isdhexgalka qoto dheer sida ResNet, halkaas oo SGD leh 0.9 ay tahay cunto karinta caadiga ah.
Sificida qiyaasaha jilbaha buuqa badan marka la isticmaalayo dufcad yar yar.
Ka baxsashada dhulka hoose ee dhulka gacmeedka ah iyadoo si xowli ah u dhex mareysa gobollada fidsan.
U adeegaya sidii erey dardargelineed gudaha hagaajinta la qabsiga sida Adam iyo RMSprop kala duwanaanshaha.
Khatarta & Dariiqyada Ilaalada
Kooxo kala duwan ayaa laga yaabaa inay isla erey u isticmaalaan si kala duwan, marka hore u qeex baaxadda.
Tilmaamaha ayaa u ekaan kara kuwo xooggan halka waxqabadka dhabta ah ee dunidu aanu sinnayn.
In la iska indho tiro tayada xogta iyo qorshayaasha qiimayntu waxay inta badan abuurtaa natiijooyin jilicsan.
Qorshe Hawleedka Dhaqangelinta
Ka bilow qeexidda luqadda cad ee natiijada aad u baahan tahay.
Dooro hal cabbir guusha iyo hal xaalad guuldarro ka hor tijaabada.
Ku orod duuliye yar oo wata xogta matale, ee ma aha bandhig muuqaal ah.
Dukumeenti meesha Stochastic Gradient Deescent with Momentum ay caawiso iyo meelaha hababka fudud ay ka fiican yihiin.
Sii wad Sahaminta
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Hagaha xiga
Hoos-u-dhac
Su'aalaha soo noqnoqda
What is Stochastic Gradient Descent with Momentum?
Momentum waa habayn lagu soo degayo gradient taaso uruurisa celceliska ordaya ee gradients ee hore, taasoo u ogolaanaysa tayaynta inay si dhakhso leh ugu dhex wareegto dooxooyinka oo ay qoyaan rogrogmada. Waa mid ka mid ah tabobarrada aadka loo isticmaalo ee barashada qoto dheer.
Waa maxay ereyada firfircoonidu ku ururto muddada tababarka?
Momentum waxa ay ilaalisaa xawaaraha xawaaraha kaas oo ah celcelis dhaqdhaqaajin si wayn loo miisaamay ee jaanisyada dhawaa, iyada oo hagaajinaysa jihada cusboonaysiinta.
Tog dheer oo cidhiidhi ah, waa maxay dhibatada SGD cad ee soo gaadhay in xawligaasi gacan ka geysto hagaajinta?
Xowli la'aan, SGD waxay u wareegtaa jihooyinka dhaadheer ee dooxa. Dhaqdhaqaaqa wuxuu baabi'iyaa rogrogadkan oo wuxuu ku dedejiyaa sagxadda dooxada dabacsan.
Waa kuwee isbarbardhigga jireed ee inta badan loo isticmaalo in lagu qeexo firfircoonida?
Dhaqdhaqaaqa waxaa la mid ah kubad culus oo ku dhista xawaaraha jihooyin joogto ah oo iska caabiya ka leexinta kuuskuusan buuqa badan.
Qiyaastii intee in le'eg ayay dardargelintu kordhisaa tallaabada waxtarka leh ee jihada joogtada ah marka beta = 0.9?
Qodobka weyneynta waa qiyaastii 1/(1 - beta), iyo 1/(1 - 0.9) = 10, markaa jihooyinka joogtada ah ayaa kor loo qaaday qiyaas ahaan toban laab.
Wanaajiye casri ah kee ku dara qiyaasta daqiiqada koowaad ee qaabka dardargelinta?
Aadam waxa uu isku daraa qiyaas u eg daqiiqad-koowaad (macnaha) ee jaangooyooyinka iyo qiyaasta daqiiqad-dabaad (kala duwanaanshiyaha) ee cabbirka la qabsiga.