{"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\/ro\/sigmoid-pattern\/","title":{"rendered":"Ce este un model Sigmoid \u0219i cele 3 etape ale curbei?"},"content":{"rendered":"<p>Este esen\u021bial s\u0103 \u00een\u021belege\u021bi semnifica\u021bia unui model sau a unei func\u021bii sigmoidale, indiferent dac\u0103 v\u0103 construi\u021bi propria re\u021bea neuronal\u0103 sau construi\u021bi un model de cre\u0219tere a drojdiei. \u00cenv\u0103\u021barea problemelor complexe se explic\u0103 prin func\u021bia sigmoid\u0103 \u0219i curbele de cre\u0219tere.&nbsp;<\/p>\n\n\n\n<p>Masa uscat\u0103 este un indicator mai consistent al cre\u0219terii atunci c\u00e2nd se m\u0103soar\u0103 cre\u0219terea. M\u0103sur\u0103torile noastre de cre\u0219tere se bazeaz\u0103 de obicei pe c\u00e2t de mult cre\u0219tem \u00een \u00een\u0103l\u021bime sau \u00een greutate, deoarece nu pute\u021bi evapora pur \u0219i simplu un organism.&nbsp;<\/p>\n\n\n\n<p>Prin urmare, func\u021biile sigmoide permit estimarea numeric\u0103 a parametrilor, deoarece sunt diferen\u021biabile. S\u0103 arunc\u0103m o privire asupra a ceea ce este un model sau o func\u021bie sigmoid\u0103 \u00een acest blog.&nbsp;<\/p>\n\n\n\n<h2><strong><strong><strong><strong><strong>Ce este un model sigmoid?<\/strong><\/strong><\/strong><\/strong><\/strong><\/h2>\n\n\n\n<p>Este important de remarcat faptul c\u0103 multe organisme trec prin mai multe faze distincte de cre\u0219tere \u00een timpul vie\u021bii lor. O variabil\u0103 m\u0103surabil\u0103 a m\u0103rimii sau greut\u0103\u021bii \u00een timp poate fi utilizat\u0103 pentru a cuantifica astfel de modele.&nbsp;<\/p>\n\n\n\n<p>Un model sigmoid este observat \u00een mod obi\u0219nuit \u00een condi\u021bii care sunt \u00een general consecvente \u0219i \u00een care o variabil\u0103 cre\u0219te succesiv exponen\u021bial, apoi liniar \u0219i, \u00een cele din urm\u0103, asimptotic. O curb\u0103 \u00een form\u0103 de S, sau o func\u021bie sigmoid\u0103, poate fi observat\u0103 atunci c\u00e2nd este reprezentat\u0103 grafic.&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>Distribu\u021bia normal\u0103 este inclus\u0103 \u00een curbele sigmoide, \u00eempreun\u0103 cu multe alte func\u021bii de distribu\u021bie cumulativ\u0103. O re\u021bea neuronal\u0103 le utilizeaz\u0103 \u0219i ca func\u021bie de activare.<\/p>\n\n\n\n<h2><strong><strong>Care este semnifica\u021bia modelului sigmoid?<\/strong><\/strong><\/h2>\n\n\n\n<p>Datorit\u0103 monotoniei, continuit\u0103\u021bii \u0219i diferen\u021bierii func\u021biei sigmoide, \u00eempreun\u0103 cu derivata sa, este simplu de formulat \u0219i de actualizat ecua\u021biile pentru \u00eenv\u0103\u021barea diferi\u021bilor parametri.&nbsp;<\/p>\n\n\n\n<p>O posibil\u0103 traiectorie de cre\u0219tere este reprezentat\u0103 de o curb\u0103 \u00een form\u0103 de S atunci c\u00e2nd se traseaz\u0103 dimensiunea unei popula\u021bii \u00een func\u021bie de timp. Pentru a \u00een\u021belege ciclul de via\u021b\u0103 al unui organism, trebuie s\u0103 lu\u0103m \u00een considerare acest aspect.&nbsp;<\/p>\n\n\n\n<p>\u00cen plus, func\u021biile sigmoide pot fi utilizate \u00een re\u021belele neuronale pentru modelarea func\u021biilor de decizie complexe, deoarece func\u021biile neliniare au ca rezultat limite neliniare.<\/p>\n\n\n\n<h2><strong><strong>Un model sigmoid este format din trei etape<\/strong><\/strong><\/h2>\n\n\n\n<p>Curba va avea trei faze principale: o etap\u0103\/perioad\u0103 accelerat\u0103, o etap\u0103\/perioad\u0103 de tranzi\u021bie \u0219i o etap\u0103\/perioad\u0103 de platou.<\/p>\n\n\n\n<h3><strong><strong>Etapa exponen\u021bial\u0103<\/strong><\/strong><\/h3>\n\n\n\n<p>\u00cen stadiile timpurii, cre\u0219terea popula\u021biei ar fi relativ lent\u0103 (perioad\u0103 de decalaj), deoarece pu\u021bini indivizi reproduc\u0103tori ar fi larg r\u0103sp\u00e2ndi\u021bi.&nbsp;<\/p>\n\n\n\n<p>Pe m\u0103sur\u0103 ce natalitatea dep\u0103\u0219e\u0219te mortalitatea, m\u0103rimea popula\u021biei cre\u0219te constant. Energia este abundent\u0103, iar rezisten\u021ba climatic\u0103 este minim\u0103, ceea ce duce la rate de mortalitate sc\u0103zute.<\/p>\n\n\n\n<h3><strong><strong>Etapa de tranzi\u021bie<\/strong><\/strong><\/h3>\n\n\n\n<p>Din cauza cre\u0219terii popula\u021biei, resursele devin mai pu\u021bine, ceea ce duce la o lupt\u0103 pentru supravie\u021buire. Exist\u0103 o \u00eencetinire a cre\u0219terii popula\u021biei ca urmare a sc\u0103derii ratelor de natalitate \u0219i a cre\u0219terii ratelor de mortalitate.<\/p>\n\n\n\n<h3><strong><strong>Etapa de platou<\/strong><\/strong><\/h3>\n\n\n\n<p>\u00cen cele din urm\u0103, rata de mortalitate \u00een cre\u0219tere va fi egal\u0103 cu produc\u021bia de noi organisme, astfel \u00eenc\u00e2t cre\u0219terea popula\u021biei se va stabiliza.&nbsp;<\/p>\n\n\n\n<p>Ca urmare a for\u021belor restrictive, popula\u021bia a dep\u0103\u0219it capacitatea mediului de a face fa\u021b\u0103 cre\u0219terii. Este probabil ca m\u0103rimea popula\u021biei s\u0103 nu fie constant\u0103 \u00een acest moment, ci s\u0103 fluctueze \u00een jurul capacit\u0103\u021bii de suport pentru a men\u021bine un num\u0103r egal de exemplare.<\/p>\n\n\n\n<h2><strong><strong><strong><strong>Con\u021binut \u0219tiin\u021bific exclusiv, creat de oameni de \u0219tiin\u021b\u0103&nbsp;<\/strong><\/strong><\/strong><\/strong><\/h2>\n\n\n\n<p>Cum merge treaba cu lucrarea ta? A\u021bi c\u0103utat ilustra\u021bii care s\u0103 corespund\u0103 cercet\u0103rii dumneavoastr\u0103? V\u0103 sus\u021binem cu Mind the Graph.&nbsp;<\/p>\n\n\n\n<p>Dintr-o bibliotec\u0103 plin\u0103 cu mii de ilustra\u021bii, pute\u021bi alege dintr-o varietate de categorii. Cu propriul nostru creator de postere, pute\u021bi ob\u021bine un poster fantastic \u00een cel mai scurt timp.&nbsp;<\/p>\n\n\n\n<p>\u00cen plus, exper\u021bii no\u0219tri pot, de asemenea, s\u0103 personalizeze ilustra\u021biile \u00een func\u021bie de specifica\u021biile dumneavoastr\u0103.<\/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\">Crea\u021bi figuri \u0219tiin\u021bifice eficiente \u00een c\u00e2teva minute<\/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=\"Sinapse neuronale Infografic\" 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>S\u0103 arunc\u0103m o privire la ceea ce este un model sau o func\u021bie sigmoid\u0103 \u0219i la toate etapele diferite ale acestora \u00een acest articol. <\/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 and The 3 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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\/ro\/author\/aayuyshi\/"}]}},"_links":{"self":[{"href":"https:\/\/mindthegraph.com\/blog\/ro\/wp-json\/wp\/v2\/posts\/19740"}],"collection":[{"href":"https:\/\/mindthegraph.com\/blog\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mindthegraph.com\/blog\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mindthegraph.com\/blog\/ro\/wp-json\/wp\/v2\/users\/27"}],"replies":[{"embeddable":true,"href":"https:\/\/mindthegraph.com\/blog\/ro\/wp-json\/wp\/v2\/comments?post=19740"}],"version-history":[{"count":1,"href":"https:\/\/mindthegraph.com\/blog\/ro\/wp-json\/wp\/v2\/posts\/19740\/revisions"}],"predecessor-version":[{"id":19784,"href":"https:\/\/mindthegraph.com\/blog\/ro\/wp-json\/wp\/v2\/posts\/19740\/revisions\/19784"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mindthegraph.com\/blog\/ro\/wp-json\/wp\/v2\/media\/19783"}],"wp:attachment":[{"href":"https:\/\/mindthegraph.com\/blog\/ro\/wp-json\/wp\/v2\/media?parent=19740"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mindthegraph.com\/blog\/ro\/wp-json\/wp\/v2\/categories?post=19740"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mindthegraph.com\/blog\/ro\/wp-json\/wp\/v2\/tags?post=19740"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}