Ibicuruzwa bitandukanye
Kubogama kubogamye gusobanura impamvu icyitegererezo gishobora kunanirwa muburyo bworoshye cyangwa bukomeye.
Incamake
It's the central tension behind underfitting versus overfitting, and getting it right determines whether your model generalizes to new data.
Kwibira cyane
Ikosa ryose ryo guhanura icyitegererezo gikora rishobora kugabanywamo ibice bitatu: kubogama, gutandukana, n urusaku rudashoboka. Kubogama ni ikosa riva mubitekerezo bidakwiye - icyitegererezo cyoroshye cyane kugirango gifate imiterere nyayo, nko guhuza umurongo ugororotse kumurongo (kudakwiye). Ibinyuranyo ni ikosa kuva sensibilité to sample yihariye y'icyitegererezo - icyitegererezo cyoroshye cyane gufata mu mutwe urusaku n'urusaku (birenze). Gufata nuko kumanura umwe bikunda kuzamura undi. Urwego rwohejuru rwa polinomial rugabanya kubogama ariko ibyahanuwe bihindagurika cyane na buri dataset nshya. Intego ntabwo ari ugukuraho ikosa ahubwo ni ugushaka ahantu heza aho igiteranyo cyabo - ikosa ryateganijwe ryose kumibare itagaragara - ni rito.
Ubushishozi
Ikigereranyo cyikizamini giteganijwe kirangirika nkuko Bias kwaduka wongeyeho Ibinyuranye wongeyeho ikosa ridasubirwaho. Nka moderi igoye izamuka, kubogama kugwa monotonike mugihe itandukaniro rizamuka, ritanga U-igeragezwa-ikosa ryo kugabanura byibuze byibuze byoroshye. Guhinduranya (nka L2 / ibihano bya ridge), gutema, no kugabanya ubujyakuzimu bwibiti nkana ongera nkana kubogama kugirango ugabanye itandukaniro. Uburyo bwa ensemble bukoresha imibare imwe: guterura impuzandengo yerekana moderi nyinshi zo murwego rwo hejuru kugirango zigabanye itandukaniro, mugihe kuzamura bigabanya kubogama mugukurikirana abiga intege nke.
Ingaruka z'Ingamba
Ibyemezo bisobanutse
Iragufasha gutandukanya ibyifuzo bya tekiniki bisobanutse nururimi rwo kwamamaza.
Igiciro na bije
Urashobora kubaza ibibazo byiza byo gushyira mubikorwa mbere yo gukoresha amafaranga cyangwa igihe.
Itsinda hamwe nakazi
Amakipe asangiye ibitekerezo akora ibicuruzwa byiza, politiki, nibyemezo byo kwiga.
Kazoza ka Bias-Ibicuruzwa bitandukanye
Kwiga byimbitse byagoye inkuru ya kera. Abashakashatsi barebeye hamwe 'kumanuka kabiri,' aho ikosa ryikizamini ryabanje kuzamuka, hanyuma rikongera kugwa mugihe imiyoboro minini irenze urugero ikura hejuru ya interpolation - bisa nkaho irwanya U-umurongo. Gusobanukirwa impamvu moderi nini zisanzwe nubwo ikosa ryamahugurwa hafi ya zeru ari umupaka wubushakashatsi ukora, uhujwe no guhora muburyo butaziguye nka optimiz nka SGD. Abimenyereza barushaho gushingira ku guhuza ibitekerezo, amategeko yo gupima, no kwemeza umurongo aho gushingira ku gitabo cyonyine.
Gushyira mu bikorwa Isi
Guhitamo ubujyakuzimu bwigiti cyemezo: igiti kitaremereye (kubogama cyane), igiti cyimbitse cyane gifata mumutwe umurongo wamahugurwa (variance high), bityo ugahuza ubujyakuzimu ukoresheje ikosa ryo kwemeza.
Gushiraho imbaraga zisanzwe (lambda) mumisozi cyangwa kugaruka kwa lasso kugirango ucuruze kwiyongera gake kubogamye kubwo kugabanuka kwinshi kubitandukanye kandi neza neza.
Gukoresha amashyamba adasanzwe, ugereranije ibiti byinshi-bifitanye isano n’ibiti bitandukanye kugirango ugabanye itandukaniro rusange utarinze kubogama cyane.
Gutoranya umubare wabaturanyi k muri k-NN: k = 1 ifite itandukaniro ryinshi kandi ikurikira urusaku, mugihe k nini cyane k irenze kandi ikongeramo kubogama.
Ingaruka & Kurinda
Amakipe atandukanye arashobora gukoresha ijambo rimwe muburyo butandukanye, sobanura intera hakiri kare.
Ibipimo birashobora kugaragara bikomeye mugihe imikorere-yisi-itaringaniye.
Kwirengagiza ubuziranenge bwamakuru na gahunda yo gusuzuma akenshi bitanga ibisubizo byoroshye.
Igishushanyo mbonera
Tangira nururimi rusobanutse rwibisubizo ukeneye.
Toranya intsinzi imwe hamwe nuburyo bumwe bwo gutsindwa mbere yo kwipimisha.
Koresha umuderevu muto hamwe namakuru ahagarariye, ntabwo ari demo yashizweho.
Inyandiko aho Bias-Variance Tradeoff ifasha kandi nuburyo bworoshye bworoshye.
Komeza Ubushakashatsi
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Ubuyobozi bukurikira
AI Kubogama
Ibibazo bikunze kubazwa
What is Bias-Variance Tradeoff?
Kubogama kubogamye gusobanura impamvu icyitegererezo gishobora kunanirwa muburyo bworoshye cyangwa bukomeye. Nibibazo byingenzi hagati yinyuma idahwitse hamwe no gukabya, kandi kubibona neza byerekana niba moderi yawe ihuriweho namakuru mashya.
What is next for Bias-Variance Tradeoff?
Kwiga byimbitse byagoye inkuru ya kera. Abashakashatsi barebeye hamwe 'kumanuka kabiri,' aho ikosa ryikizamini ryabanje kuzamuka, hanyuma rikongera kugwa mugihe imiyoboro minini irenze urugero ikura hejuru ya interpolation - bisa nkaho irwanya U-umurongo. Gusobanukirwa impamvu moderi nini zisanzwe nubwo ikosa ryamahugurwa hafi ya zeru ari umupaka wubushakashatsi ukora, uhujwe no guhora muburyo butaziguye nka optimiz nka SGD. Abimenyereza barushaho gushingira ku guhuza ibitekerezo, amategeko yo gupima, no kwemeza umurongo aho gushingira ku gitabo cyonyine.
Ni ibihe bintu ni ikimenyetso cyerekana itandukaniro ryinshi (birenze)?
Impinduka nyinshi zigaragara nkikinyuranyo kinini hagati yimyitozo myiza yimyitozo nimikorere mibi yikizamini - icyitegererezo cyafashe mu mutwe amakuru yamahugurwa.
Mugihe wongeye icyitegererezo cyikitegererezo, mubisanzwe bigenda bite kubogama no gutandukana?
Ibintu byinshi bigoye kureka icyitegererezo gihuza amakuru neza (kubogama hasi) ariko bigatuma irushaho kumva neza amahugurwa yihariye (variance yo hejuru).