{"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\/sk\/sigmoidny-vzor\/","title":{"rendered":"\u010co je to sigmoidn\u00fd vzor a 3 f\u00e1zy krivky?"},"content":{"rendered":"<p>Je nevyhnutn\u00e9 pochopi\u0165 v\u00fdznam sigmoidn\u00e9ho vzoru alebo funkcie bez oh\u013eadu na to, \u010di si vytvor\u00edte vlastn\u00fa neur\u00f3nov\u00fa sie\u0165 alebo skon\u0161truujete model rastu kvasiniek. U\u010denie zlo\u017eit\u00fdch probl\u00e9mov sa vysvet\u013euje pomocou sigmoid\u00e1lnej funkcie a rastov\u00fdch kriviek.&nbsp;<\/p>\n\n\n\n<p>Pri meran\u00ed rastu je such\u00e1 hmotnos\u0165 konzistentnej\u0161\u00edm ukazovate\u013eom rastu. Na\u0161e merania rastu sa zvy\u010dajne zakladaj\u00fa na tom, ko\u013eko sme pribrali na v\u00fd\u0161ke alebo hmotnosti, preto\u017ee organizmus sa ned\u00e1 jednoducho odpari\u0165.&nbsp;<\/p>\n\n\n\n<p>V\u00fdsledkom je, \u017ee sigmoidn\u00e9 funkcie umo\u017e\u0148uj\u00fa numerick\u00fd odhad parametrov, preto\u017ee s\u00fa diferencovate\u013en\u00e9. Pozrime sa v tomto blogu na to, \u010do je sigmoidn\u00fd vzor alebo funkcia.&nbsp;<\/p>\n\n\n\n<h2><strong><strong><strong><strong><strong>\u010co je to sigmoidn\u00fd vzor?<\/strong><\/strong><\/strong><\/strong><\/strong><\/h2>\n\n\n\n<p>Je d\u00f4le\u017eit\u00e9 poznamena\u0165, \u017ee mnoh\u00e9 organizmy prech\u00e1dzaj\u00fa po\u010das svojho \u017eivota nieko\u013ek\u00fdmi odli\u0161n\u00fdmi f\u00e1zami rastu. Na kvantifik\u00e1ciu tak\u00fdchto modelov mo\u017eno pou\u017ei\u0165 merate\u013en\u00fa premenn\u00fa ve\u013ekosti alebo hmotnosti v priebehu \u010dasu.&nbsp;<\/p>\n\n\n\n<p>Sigmoidn\u00fd vzorec sa be\u017ene pozoruje v podmienkach, ktor\u00e9 s\u00fa v\u0161eobecne konzistentn\u00e9 a kde premenn\u00e1 postupne rastie exponenci\u00e1lne, potom line\u00e1rne a nakoniec asymptoticky. Pri vykreslen\u00ed mo\u017eno vidie\u0165 krivku v tvare p\u00edsmena S alebo sigmoidn\u00fa funkciu.&nbsp;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2022\/08\/population-growth-curve_med.jpeg\"><img decoding=\"async\" src=\"https:\/\/mindthegraph.com\/blog\/wp-content\/uploads\/2022\/08\/population-growth-curve_med.jpeg\" alt=\"\" class=\"wp-image-16591\"\/><\/a><\/figure><\/div>\n\n\n<p>Norm\u00e1lne rozdelenie je zahrnut\u00e9 v sigmoidn\u00fdch krivk\u00e1ch spolu s mnoh\u00fdmi \u010fal\u0161\u00edmi kumulat\u00edvnymi distribu\u010dn\u00fdmi funkciami. Ako aktiva\u010dn\u00fa funkciu ich pou\u017e\u00edva aj neur\u00f3nov\u00e1 sie\u0165.<\/p>\n\n\n\n<h2><strong><strong>Ak\u00fd v\u00fdznam m\u00e1 sigmoidn\u00fd vzor?<\/strong><\/strong><\/h2>\n\n\n\n<p>V\u010faka monot\u00f3nnosti, spojitosti a diferenci\u00e1cii sigmoidnej funkcie spolu s jej deriv\u00e1ciou je jednoduch\u00e9 formulova\u0165 a aktualizova\u0165 rovnice pre u\u010denie r\u00f4znych parametrov.&nbsp;<\/p>\n\n\n\n<p>Mo\u017en\u00fa trajekt\u00f3riu rastu predstavuje s-krivka pri vykreslen\u00ed ve\u013ekosti popul\u00e1cie v z\u00e1vislosti od \u010dasu. Aby sme pochopili \u017eivotn\u00fd cyklus organizmu, mus\u00edme tento aspekt zoh\u013eadni\u0165.&nbsp;<\/p>\n\n\n\n<p>Okrem toho sigmoidn\u00e9 funkcie mo\u017eno pou\u017ei\u0165 v neur\u00f3nov\u00fdch sie\u0165ach na modelovanie zlo\u017eit\u00fdch rozhodovac\u00edch funkci\u00ed, preto\u017ee neline\u00e1rne funkcie ved\u00fa k neline\u00e1rnym limit\u00e1m.<\/p>\n\n\n\n<h2><strong><strong>Sigmoidn\u00fd vzor pozost\u00e1va z troch f\u00e1z<\/strong><\/strong><\/h2>\n\n\n\n<p>Krivka bude ma\u0165 tri z\u00e1kladn\u00e9 f\u00e1zy: zr\u00fdchlen\u00fa f\u00e1zu\/obdobie, prechodn\u00fa f\u00e1zu\/obdobie a f\u00e1zu\/obdobie n\u00e1behu.<\/p>\n\n\n\n<h3><strong><strong>Exponenci\u00e1lna f\u00e1za<\/strong><\/strong><\/h3>\n\n\n\n<p>V po\u010diato\u010dn\u00fdch \u0161t\u00e1di\u00e1ch by bol rast popul\u00e1cie relat\u00edvne pomal\u00fd (obdobie oneskorenia), preto\u017ee by bolo rozpt\u00fdlen\u00fdch len m\u00e1lo reproduk\u010dn\u00fdch jedincov.&nbsp;<\/p>\n\n\n\n<p>Ke\u010f\u017ee natalita prevy\u0161uje mortalitu, ve\u013ekos\u0165 popul\u00e1cie neust\u00e1le rastie. Energie je dostatok a odolnos\u0165 vo\u010di kl\u00edme je minim\u00e1lna, \u010do m\u00e1 za n\u00e1sledok n\u00edzku \u00famrtnos\u0165.<\/p>\n\n\n\n<h3><strong><strong>Prechodn\u00e9 \u0161t\u00e1dium<\/strong><\/strong><\/h3>\n\n\n\n<p>V d\u00f4sledku n\u00e1rastu popul\u00e1cie ub\u00fadaj\u00fa zdroje, \u010do sp\u00f4sobuje boj o pre\u017eitie. V d\u00f4sledku klesaj\u00facej natality a rast\u00facej mortality doch\u00e1dza k spomaleniu rastu popul\u00e1cie.<\/p>\n\n\n\n<h3><strong><strong>F\u00e1za n\u00e1hornej plo\u0161iny<\/strong><\/strong><\/h3>\n\n\n\n<p>Nakoniec sa rast\u00faca miera \u00famrtnosti vyrovn\u00e1 produkcii nov\u00fdch organizmov, tak\u017ee rast popul\u00e1cie sa zastav\u00ed.&nbsp;<\/p>\n\n\n\n<p>V d\u00f4sledku obmedzuj\u00facich s\u00edl popul\u00e1cia prer\u00e1stla mo\u017enosti prostredia vyrovna\u0165 sa s jej n\u00e1rastom. Je pravdepodobn\u00e9, \u017ee ve\u013ekos\u0165 popul\u00e1cie nebude v tomto bode stabiln\u00e1, ale bude kol\u00edsa\u0165 okolo \u00fanosnej kapacity na udr\u017eanie rovnomern\u00e9ho po\u010dtu.<\/p>\n\n\n\n<h2><strong><strong><strong><strong>Exkluz\u00edvny vedeck\u00fd obsah vytvoren\u00fd vedcami&nbsp;<\/strong><\/strong><\/strong><\/strong><\/h2>\n\n\n\n<p>Ako pokra\u010duje va\u0161a pr\u00e1ca? H\u013eadali ste ilustr\u00e1cie, ktor\u00e9 zodpovedaj\u00fa v\u00e1\u0161mu v\u00fdskumu? S Mind the Graph v\u00e1m kryjeme chrb\u00e1t.&nbsp;<\/p>\n\n\n\n<p>V kni\u017enici s tis\u00edckami ilustr\u00e1ci\u00ed si m\u00f4\u017eete vybra\u0165 z r\u00f4znych kateg\u00f3ri\u00ed. V\u010faka n\u00e1\u0161mu vlastn\u00e9mu n\u00e1stroju na tvorbu plag\u00e1tov m\u00f4\u017eete v okamihu z\u00edska\u0165 fantastick\u00fd plag\u00e1t.&nbsp;<\/p>\n\n\n\n<p>Okrem toho v\u00e1m na\u0161i odborn\u00edci m\u00f4\u017eu prisp\u00f4sobi\u0165 ilustr\u00e1cie pod\u013ea va\u0161ich po\u017eiadaviek.<\/p>\n\n\n\n<div class=\"is-layout-flex wp-block-buttons\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-background\" href=\"https:\/\/mindthegraph.com\/science_figures\" style=\"border-radius:50px;background-color:#dc1866\" target=\"_blank\" rel=\"noreferrer noopener\">Vytv\u00e1rajte efekt\u00edvne vedeck\u00e9 postavy za nieko\u013eko min\u00fat<\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:11px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Neuron\u00e1lne synapsie Infografika\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/2DwIBRzuH5A?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Pozrime sa v tomto \u010dl\u00e1nku na to, \u010do je to sigmoidn\u00fd vzor alebo funkcia a v\u0161etky ich r\u00f4zne f\u00e1zy. <\/p>","protected":false},"author":27,"featured_media":19783,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[38],"tags":[554,775,777,909,962],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is a Sigmoid Pattern 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She is currently pursuing a master's degree in Bioentrepreneurship from Karolinska Institute. She is interested in health and diseases, global health, socioeconomic development, and women's health. As a science enthusiast, she is keen in learning more about the scientific world and wants to play a part in making a difference.","sameAs":["http:\/\/linkedin.com\/in\/aayushizaveri"],"url":"https:\/\/mindthegraph.com\/blog\/sk\/author\/aayuyshi\/"}]}},"_links":{"self":[{"href":"https:\/\/mindthegraph.com\/blog\/sk\/wp-json\/wp\/v2\/posts\/19740"}],"collection":[{"href":"https:\/\/mindthegraph.com\/blog\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mindthegraph.com\/blog\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mindthegraph.com\/blog\/sk\/wp-json\/wp\/v2\/users\/27"}],"replies":[{"embeddable":true,"href":"https:\/\/mindthegraph.com\/blog\/sk\/wp-json\/wp\/v2\/comments?post=19740"}],"version-history":[{"count":1,"href":"https:\/\/mindthegraph.com\/blog\/sk\/wp-json\/wp\/v2\/posts\/19740\/revisions"}],"predecessor-version":[{"id":19784,"href":"https:\/\/mindthegraph.com\/blog\/sk\/wp-json\/wp\/v2\/posts\/19740\/revisions\/19784"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mindthegraph.com\/blog\/sk\/wp-json\/wp\/v2\/media\/19783"}],"wp:attachment":[{"href":"https:\/\/mindthegraph.com\/blog\/sk\/wp-json\/wp\/v2\/media?parent=19740"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mindthegraph.com\/blog\/sk\/wp-json\/wp\/v2\/categories?post=19740"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mindthegraph.com\/blog\/sk\/wp-json\/wp\/v2\/tags?post=19740"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}