Tikanga hoa tata: tauira o te mahi

te tikanga hoa tata ko te classifier ngahuru māmā e hāngai ana nei i runga i te aro mātai o te ōrite o ngā rerekē.

no ahanoa tātarihia ki te piha haapiiraa ki nei no ratou kaupapa o tauira whakangungu. Kia kitea tatou i roto i i te te hoa tata. Whakamātauria ki matau i te mea uaua, tauira o ngā rautaki rerekē.

tikanga whakapae

Ka taea te whakaaro tikanga hoa tata rite te hātepe tino noa whakamahia mō te whakarōpū. Ahanoa pangia whakarōpū no ki te y_i piha haapiiraa, ki nei te ahanoa tata ako tauira x_i.

Pū o tikanga tata hoa

k tikanga hoa tata taea te whakapai ake i te tika o te whakarōpū. no ahanoa tātarihia ki te piha taua rite te nuinga o ona hoa tata, e ko, k tata ki ahanoa reira o te tauira x_i tātarihia. I roto i te whakaoti rapanga ki e rua akomanga o te maha o noho tata ka rerekē ki te karo i te āhuatanga o te rangirua, ki te ka riro i te taua maha o noho tata ki akomanga rerekē.

Ko te tikanga o noho tata iri

tikanga PostgreSQL-tātarihia tsvector tata noho tata whakamahia te ka te maha o ngā akomanga i te iti rawa e toru, a koutou e taea e kore te whakamahi i te tuhene. Ko te panga rangirua noa i roto i enei take. Na, riro te hoa i-th taimaha w_i, e heke ki te paetukutuku hoa i. E pā ana te reira ki te piha o te ahanoa, e ka whai i te taimaha katoa mōrahi i roto i noho tata tata.

Ko te whakapae o te compactness

I te ngakau o katoa o nga tikanga i runga ake ko te whakapae o compactness. kī te reira i te hononga i waenganui i te mehua o te ōrite o ngā me ratou no ki te piha taua. I roto i tenei āhuatanga, te rohe i waenganui i nga momo rerekē ko te ahua ohie, ka hanga i ngā akomanga o ngā i roto i te wāhi rohe pūkoro kiato. I raro i taua wāhi i roto i te tātari pāngarau tangohia ki te tikanga o te huinga rohea kati. e kore te ana tēnei whakapae e pā ana ki te perception rā o te kupu.

Ko te tātai taketake

Kia titiro tatou atu hoa tata. Ki te te whakangungu whakaarohia momo tauira "ahanoa-whakautu» X ^ m = \ {(x_1, y_1), \ ira, (x_m, y_m) \}; ki te ki he plurality o ngā tautuhi te tawhiti mahi \ rho (x, x '), fakafofonga'i nei i roto i te puka o te tauira faitatau tika o ngā i te whakanui ake i te uara o te mahi heke ōrite i waenganui i ngā x, x'.

Hoki tetahi ahanoa, ka hanga u he tauira whakangungu ahanoa x_i ki te whakanui ake tawhiti ki u:

\ Rho (u, x_ {1; u}) \ leq \ rho (u, x_ {2; u}) \ leq \ cdots \ leq \ rho (u, x_ {m; u}),

te wahi x_ {i; u} faaite te tauira ako ahanoa, i te mea i-th ahanoa pūtake hoa u. Taua momotuhi, me te whakamahi ki te whakautu ki te hoa i-th: y_ {i; u}. Ka rite ki te hua, kitea tatou e tetahi ahanoa u whakaoho fo'ou 'ake tauira.

Whakatau i o te k maha o noho tata

tikanga hoa tata, no te k = 1 Ko te ahei o te hoatu i te whakarōpūtanga hape, i runga i ngā-tukunga kore anake, engari ano mo te tahi atu akomanga e he tata.

Ki te tangohia e tatou k = m, ka kia rite pūmau te hātepe me te ka ololalo ia ki te uara tamau. Ko te aha te mea nui te tika ki te karo i kuputohu tino k.

I roto i te mahi, paearu rite te k taupū tino pai whakamahia retireti mana.

whakaaturanga tukunga

E te nuinga taurite nga taonga o ako, engari i roto ia ratou i reira ko te hunga e whai i te āhuatanga o te piha haapiiraa, a kua tuku ki rite paerewa. I tata o te kaupapa ki te tauira pai o tona tūponotanga tiketike o no ki tenei piha haapiiraa.

Kia pehea te rezultativen tikanga o tata hoa? Ka taea te kite i tētahi tauira i runga i te pūtake o ngā kāwai piringa, me te kore-kōrero o ngā. Kei te riro te reira i te taiao mātotoru o te ahanoa atu māngai o tenei piha. A, no te tango ratou koutou i te whakarōpū o te kohi i te kounga kore e tukua e.

Haere ki te maha etahi o ngā tauira kia pakū haruru e "i runga i te whenua" o te piha haapiiraa. Te tango pānga nui pai i runga i te kounga o te whakarōpūtanga.

Ki te tangohia te tauira i nga taonga ngangau uninformative ka faaore, ka taea e koe te tatau i runga i te torutoru hua pai i te wa ano.

Ko te tuatahi tikanga āwhiwhiwhi o te whakarōpūtanga hoa tata taea ki te whakapai ake i te kounga, whakaiti i te nui o ngā raraunga penapena, whakaiti i te wa o te whakarōpūtanga, poto nei i runga i te pai rawa o nga paerewa muri.

Ko te whakamahi o ngā tauira ultra-nui

hāngai ana tikanga hoa tata kei i runga i te rokiroki tūturu o ngā akoranga. Hei waihanga rawa ngā tauira nui-tauine te whakamahi i te raruraru hangarau. Ko te whāinga e kore te tika ki te whakaora i te nui nui o ngā mōhiohio, engari ano hoki i roto i te nui iti o te wā ki te whai wa ki te kitea tetahi ahanoa u k i roto i te noho tata tata.

Hei akakoromaki i tenei mahi, e whakamahia tikanga e rua:

• tauira whakaiti mā te taonga rere raraunga-kore;
• whai hua te whakamahi hanganga raraunga motuhake, me waehere mō te rapu tonu o te noho tata tata.

Ture o tikanga kōwhiringa

I whakaaro te whakarōpūtanga runga ake. whakamahia tikanga hoa tata te whakaoti rapanga mahi, i mohiotia i roto i mua i te tawhiti mahi \ rho (x, x '). I roto i ngā whakaahua te whakamahi i te tahumaero tau te ngahuru Euclidean. Tenei kōwhiringa e kore tika motuhake, engari tā te inenga o tohu katoa "i roto i te tauine taua." Ki te te kore i tangohia tenei take ki pūkete, na ka mua roa i te ngahuru āhuatanga he teitei ngā uara tau.

Ki te reira te mea he nui nui o ngā āhuatanga, te tātai i te tawhiti rite te moni o nga ine i runga i te tohu motuhake puta ahu raruraru nui.

I roto i te wāhi ahu tiketike tawhiti i tetahi ki tetahi e ahanoa katoa. I te pae hopea, e waiho tetahi tauira i muri ki te ahanoa e ako k noho tata. tīpakohia he maha iti o ngā āhuatanga kōrero ki te whakakore i tenei raruraru. Hātepe mō te tātai tata hanga i runga i te pūtake o huinga rerekē o tohu, me hoki ia takitahi hanga ratou mahi pātata.

mutunga

maha ngā tātaitanga Mathematical te whakamahi o te momo o ngā rautaki e whai ratou ake motuhake āhuatanga, huapai me ngā huakore. Ka taea e i Tirohia tikanga hoa tata whakaoti rawa i te raruraru nui, e tika ana ki te āhuatanga o ngā pāngarau. Te ariā whakamātautau, e hāngai ana i runga i te tikanga tātarihia kei te kaha whakamahia i roto i te mātauranga horihori.

I roto i te pūnaha tohunga te mea e tika e kore e tika ki te whakarōpū taonga, engari ano hoki whakaatu i te kaiwhakamahi te whakamārama o te whakarōpū i roto i te pātai. I roto i tenei tikanga, kua whakahuatia he whakamārama o tenei āhuatanga i roto i te pā ana ki te ahanoa o te piha haapiiraa ngā rite pai rite tona whanaunga wāhi ki te tauira e whakamahia ana. mataotao ahumahi Ture, tohunga pūtaiao, rata, tangohia tenei "sīpinga" arorau kaha whakamahi i te reira i roto i to ratou rangahau.

I roto i te tikanga ki te kia tātarihia tikanga ko te tino pono, pai, hoatu te hua e hiahiatia ana, me tango e koe i te k ahua iti, i karo hoki pira i roto i nga taonga tātarihia. Ko Ko te aha te whakamahi o ngā paerewa, me te tikanga whiriwhiri, me te te inenga arotautanga.