{"id":19740,"date":"2022-09-07T12:25:00","date_gmt":"2022-09-07T15:25:00","guid":{"rendered":"https:\/\/mindthegraph.com\/blog\/?p=16586"},"modified":"2022-10-18T08:39:17","modified_gmt":"2022-10-18T11:39:17","slug":"sigmoid-pattern","status":"publish","type":"post","link":"https:\/\/mindthegraph.com\/blog\/lv\/sigmoidalais-modelis\/","title":{"rendered":"Kas ir sigmoid\u0101lais modelis un 3 l\u012bknes posmi?"},"content":{"rendered":"

Neatkar\u012bgi no t\u0101, vai veidojat savu neironu t\u012bklu vai konstru\u0113jat rauga aug\u0161anas modeli, ir svar\u012bgi saprast sigmoid\u0101l\u0101 mode\u013ca vai funkcijas noz\u012bmi. Sare\u017e\u0123\u012btu probl\u0113mu apguve ir izskaidrojama ar sigmoid\u0101lo funkciju un aug\u0161anas l\u012bkn\u0113m. <\/p>\n\n\n\n

M\u0113rot aug\u0161anu, saus\u0101 masa ir konsekvent\u0101ks aug\u0161anas r\u0101d\u012bt\u0101js. M\u016bsu aug\u0161anas m\u0113r\u012bjumi parasti balst\u0101s uz to, cik liels ir m\u016bsu auguma vai svara pieaugums, jo organismu nevar vienk\u0101r\u0161i iztvaic\u0113t. <\/p>\n\n\n\n

T\u0101d\u0113j\u0101di sigmoid\u0101l\u0101s funkcijas \u013cauj veikt skaitlisku parametru nov\u0113rt\u0113\u0161anu, jo t\u0101s ir diferenc\u0113jamas. \u0160aj\u0101 blog\u0101 apl\u016bkosim, kas ir sigmo\u012bda modelis vai funkcija. <\/p>\n\n\n\n

Kas ir sigmoid\u0101lais modelis?<\/strong><\/strong><\/strong><\/strong><\/strong><\/h2>\n\n\n\n

Ir svar\u012bgi atz\u012bm\u0113t, ka daudzi organismi dz\u012bves laik\u0101 iziet vair\u0101kas at\u0161\u0137ir\u012bgas aug\u0161anas f\u0101zes. Lai kvantitat\u012bvi noteiktu \u0161\u0101dus mode\u013cus, var izmantot izm\u0113r\u0101mu lieluma vai svara main\u012bgo lielumu laika gait\u0101. <\/p>\n\n\n\n

Sigmoid\u0101lais modelis parasti nov\u0113rojams apst\u0101k\u013cos, kas kopum\u0101 ir konsekventi un kur main\u012bgais lielums sec\u012bgi pieaug eksponenci\u0101li, tad line\u0101ri un visbeidzot asimptotiski. Uzz\u012bm\u0113jot S-veida l\u012bkni jeb sigmoid\u0101lo funkciju, var redz\u0113t, ka t\u0101 ir S-veida l\u012bkne. <\/p>\n\n\n

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Norm\u0101lais sadal\u012bjums ir iek\u013cauts sigmoid\u0101laj\u0101s l\u012bkn\u0113s kop\u0101 ar daudz\u0101m cit\u0101m kumulat\u012bv\u0101 sadal\u012bjuma funkcij\u0101m. Neironu t\u012bkls t\u0101s izmanto ar\u012b k\u0101 aktiviz\u0101cijas funkciju.<\/p>\n\n\n\n

K\u0101da ir sigmoid\u0101l\u0101 raksta noz\u012bme?<\/strong><\/strong><\/h2>\n\n\n\n

Pateicoties sigmoid\u0101l\u0101s funkcijas monotonijai, nep\u0101rtraukt\u012bbai un diferenc\u0113\u0161anai, k\u0101 ar\u012b t\u0101s atvasin\u0101jumam, ir vienk\u0101r\u0161i formul\u0113t un atjaunin\u0101t da\u017e\u0101du parametru m\u0101c\u012b\u0161an\u0101s vien\u0101dojumus. <\/p>\n\n\n\n

Iesp\u0113jamo pieauguma trajektoriju att\u0113lo s-veida l\u012bkne, kad popul\u0101cijas lielumu att\u0113lo atkar\u012bb\u0101 no laika. Lai izprastu organisma dz\u012bves ciklu, mums ir j\u0101\u0146em v\u0113r\u0101 \u0161is aspekts. <\/p>\n\n\n\n

Turkl\u0101t sigmoid\u0101l\u0101s funkcijas var izmantot neironu t\u012bklos, lai model\u0113tu sare\u017e\u0123\u012btas l\u0113mumu pie\u0146em\u0161anas funkcijas, jo neline\u0101ras funkcijas rada neline\u0101ras robe\u017eas.<\/p>\n\n\n\n

Sigmoid\u0101lais modelis sast\u0101v no trim posmiem<\/strong><\/strong><\/h2>\n\n\n\n

K\u013c\u016bdu l\u012bknei b\u016bs tr\u012bs galvenie posmi: pa\u0101trin\u0101juma posms\/periods, p\u0101rejas posms\/periods un plato posms\/periods.<\/p>\n\n\n\n

Eksponenci\u0101lais posms<\/strong><\/strong><\/h3>\n\n\n\n

S\u0101kotn\u0113j\u0101 stadij\u0101 popul\u0101cijas pieaugums b\u016btu relat\u012bvi l\u0113ns (kav\u0113\u0161an\u0101s periods), jo maz reprodukt\u012bvo indiv\u012bdu b\u016btu pla\u0161i izklied\u0113ti. <\/p>\n\n\n\n

T\u0101 k\u0101 dzimst\u012bba p\u0101rsniedz mirst\u012bbu, iedz\u012bvot\u0101ju skaits past\u0101v\u012bgi pieaug. Ener\u0123ijas ir p\u0101rpiln\u012bba, un klimata pretest\u012bba ir minim\u0101la, t\u0101p\u0113c mirst\u012bbas r\u0101d\u012bt\u0101ji ir zemi.<\/p>\n\n\n\n

P\u0101rejas posms<\/strong><\/strong><\/h3>\n\n\n\n

Iedz\u012bvot\u0101ju skaita pieauguma d\u0113\u013c resursi samazin\u0101s, izraisot c\u012b\u0146u par izdz\u012bvo\u0161anu. Samazinoties dzimst\u012bbai un pieaugot mirst\u012bbai, iedz\u012bvot\u0101ju skaita pieaugums pal\u0113nin\u0101s.<\/p>\n\n\n\n

Plateau posms<\/strong><\/strong><\/h3>\n\n\n\n

Galu gal\u0101 pieaugo\u0161ais mirst\u012bbas r\u0101d\u012bt\u0101js b\u016bs vien\u0101ds ar jaunu organismu rad\u012b\u0161anu, t\u0101p\u0113c iedz\u012bvot\u0101ju skaita pieaugums k\u013c\u016bs plato. <\/p>\n\n\n\n

Ierobe\u017eojo\u0161o faktoru ietekm\u0113 iedz\u012bvot\u0101ju skaits ir p\u0101rsniedzis vides sp\u0113ju tikt gal\u0101 ar pieaugumu. Visticam\u0101k, ka \u0161aj\u0101 br\u012bd\u012b popul\u0101cijas lielums neb\u016bs stabils, bet sv\u0101rst\u012bsies ap nes\u0113jsp\u0113ju, lai saglab\u0101tu vienm\u0113r\u012bgu skaitu.<\/p>\n\n\n\n

Ekskluz\u012bvs zin\u0101tnisks saturs, ko rad\u012bju\u0161i zin\u0101tnieki <\/strong><\/strong><\/strong><\/strong><\/h2>\n\n\n\n

K\u0101 sokas ar j\u016bsu darbu? Vai esat mekl\u0113jis ilustr\u0101cijas, kas atbilst j\u016bsu p\u0113t\u012bjumam? Ar Mind the Graph pal\u012bdz\u012bbu m\u0113s jums pal\u012bdzam. <\/p>\n\n\n\n

No bibliot\u0113kas, kur\u0101 ir t\u016bksto\u0161iem ilustr\u0101ciju, varat izv\u0113l\u0113ties no da\u017e\u0101d\u0101m kategorij\u0101m. Izmantojot m\u016bsu pa\u0161u plak\u0101tu veidot\u0101ju, j\u016bs varat izveidot fantastisku plak\u0101tu \u012bs\u0101 laik\u0101. <\/p>\n\n\n\n

Turkl\u0101t m\u016bsu eksperti var ar\u012b piel\u0101got ilustr\u0101cijas atbilsto\u0161i j\u016bsu specifik\u0101cij\u0101m.<\/p>\n\n\n\n

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Efekt\u012bvu zin\u0101tnisko fig\u016bru izveide da\u017eu min\u016b\u0161u laik\u0101<\/a><\/div>\n<\/div>\n\n\n\n
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