{"id":14347,"date":"2019-12-05T14:27:17","date_gmt":"2019-12-05T08:57:17","guid":{"rendered":"https:\/\/iihs.co.in\/knowledge-gateway\/?p=14347"},"modified":"2019-12-05T14:28:44","modified_gmt":"2019-12-05T08:58:44","slug":"automated-classification-of-a-large-database-of-stellar-spectra","status":"publish","type":"post","link":"https:\/\/iihs.co.in\/knowledge-gateway\/automated-classification-of-a-large-database-of-stellar-spectra\/","title":{"rendered":"Automated Classification of a Large Database of Stellar Spectra"},"content":{"rendered":"<div id='full_slider_1'  class='avia-fullwidth-slider main_color avia-shadow   avia-builder-el-0  el_before_av_layout_row  avia-builder-el-first   container_wrap sidebar_right'  ><div  class='avia-slideshow av-av_slideshow_full-256baf843038993bbe2e04682c8b91b9 avia-slideshow-featured av_slideshow_full avia-fade-slider av-slideshow-ui av-control-hidden av-no-slider-navigation av-hide-nav-arrows av-slideshow-manual av-loop-once av-loop-manual-endless 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el_after_av_cell_one_fifth  el_before_av_cell_one_fifth '  ><div class='flex_cell_inner'><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-k3shhxxn-8bb59a2eb088a23149ab8ec957b0f11a\">\n#top .av-special-heading.av-k3shhxxn-8bb59a2eb088a23149ab8ec957b0f11a{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-k3shhxxn-8bb59a2eb088a23149ab8ec957b0f11a .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-k3shhxxn-8bb59a2eb088a23149ab8ec957b0f11a .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-k3shhxxn-8bb59a2eb088a23149ab8ec957b0f11a av-special-heading-h3  avia-builder-el-5  el_before_av_textblock  avia-builder-el-first '><h3 class='av-special-heading-tag'  itemprop=\"headline\"  >Automated Classification of a Large Database of Stellar Spectra<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<section  class='av_textblock_section av-k3shiqxm-0498c89be5e87a8bd4fdf5cffbf99f3c '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><span style=\"font-size: 13px; text-transform: none; color: #8a0000;\"><em>R. K. Gulati, Ranjan Gupta, Pradeep Gothoskar, <a href=\"https:\/\/iihs.co.in\/iihs-people\/team\/shyam-khobragade\/\">Shyam Khobragade<\/a><\/em>| 1995<\/span><\/p>\n<\/div><\/section><br \/>\n<section  class='av_textblock_section av-k3shjkkf-d59417ccab2905c73e65d680980fe823 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p class=\"p2\">Abstract<\/p>\n<p>Artificial Neural Network (ANN) is a versatile tool which has been used both in academic research and industrial applications. In astronomy, this technique has been used for a variety of applications, such as telescope adaptive optics, classifying galaxies, and separating stars from galaxies. The classification of a large database of stellar spectra, which would be a Herculean task for human classifiers if done visually, is an ideal problem for the ANN technique, which can handle such problems without manual intervention. Recently, increased computational power, combined with improvement in the ANN techniques, has provided an efficient way to perform automatic classification. We have implemented ANN to classify stellar spectra from large spectral databases. We present here the Multilayer Back Propagation Network (MBPN), which is used to classify stellar spectra obtained in the optical and ultraviolet regions. The performance of MBPN shows that the ANN is capable of classifying ultraviolet stellar spectra to an accuracy of about one spectral subclass for most of the cases. The scope of this technique is expected to be expanded with the availability of large homogeneous digitized stellar spectral databases.<\/p>\n<p class=\"p4\">\n<\/div><\/section><br \/>\n<div  class='avia-button-wrap av-k3shjyqh-504f428a1a8c3125c13f0ca97606f78f-wrap avia-button-left  avia-builder-el-8  el_after_av_textblock  el_before_av_hr '><a href='https:\/\/adsabs.harvard.edu\/full\/1995ASPC...77..253G' class='avia-button av-k3shjyqh-504f428a1a8c3125c13f0ca97606f78f avia-icon_select-yes-left-icon avia-size-medium avia-position-left avia-color-theme-color' target=\"_blank\" rel=\"noopener noreferrer\"><span class='avia_button_icon avia_button_icon_left' aria-hidden='true' data-av_icon='\ue82d' data-av_iconfont='entypo-fontello'><\/span><span class='avia_iconbox_title' >Access Paper<\/span><\/a><\/div><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_hr-5ea7596238ed9f191e6b5e662093052f\">\n#top 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Reports<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/cultural-flows\/\" class=\"tag-cloud-link tag-link-200 tag-link-position-7\" style=\"font-size: 8pt;\" aria-label=\"Cultural Flows (1 item)\">Cultural Flows<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/culture\/\" class=\"tag-cloud-link tag-link-107 tag-link-position-8\" style=\"font-size: 14.434782608696pt;\" aria-label=\"Culture (10 items)\">Culture<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/data-and-metrics\/\" class=\"tag-cloud-link tag-link-103 tag-link-position-9\" style=\"font-size: 18.347826086957pt;\" aria-label=\"Data and Metrics (30 items)\">Data and Metrics<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/design\/\" class=\"tag-cloud-link tag-link-145 tag-link-position-10\" style=\"font-size: 11.478260869565pt;\" aria-label=\"Design (4 items)\">Design<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/economic-development\/\" class=\"tag-cloud-link tag-link-99 tag-link-position-11\" style=\"font-size: 18.95652173913pt;\" aria-label=\"Economic Development (35 items)\">Economic Development<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/ecosystem\/\" class=\"tag-cloud-link tag-link-152 tag-link-position-12\" style=\"font-size: 15.826086956522pt;\" aria-label=\"Ecosystem (15 items)\">Ecosystem<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/energy\/\" class=\"tag-cloud-link tag-link-160 tag-link-position-13\" style=\"font-size: 11.478260869565pt;\" aria-label=\"Energy (4 items)\">Energy<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/environment-and-climate\/\" class=\"tag-cloud-link tag-link-104 tag-link-position-14\" style=\"font-size: 22pt;\" aria-label=\"Environment and Climate (80 items)\">Environment and Climate<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/equity\/\" class=\"tag-cloud-link tag-link-94 tag-link-position-15\" style=\"font-size: 9.5652173913043pt;\" aria-label=\"Equity (2 items)\">Equity<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/gender\/\" class=\"tag-cloud-link tag-link-110 tag-link-position-16\" style=\"font-size: 11.478260869565pt;\" aria-label=\"Gender (4 items)\">Gender<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/ghs-pop\/\" class=\"tag-cloud-link tag-link-183 tag-link-position-17\" style=\"font-size: 8pt;\" aria-label=\"GHS-POP (1 item)\">GHS-POP<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/governance\/\" class=\"tag-cloud-link tag-link-102 tag-link-position-18\" style=\"font-size: 18pt;\" aria-label=\"Governance (27 items)\">Governance<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/gynecology-and-obstetrics\/\" class=\"tag-cloud-link tag-link-188 tag-link-position-19\" style=\"font-size: 8pt;\" aria-label=\"Gynecology And Obstetrics (1 item)\">Gynecology And Obstetrics<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/health\/\" class=\"tag-cloud-link tag-link-151 tag-link-position-20\" style=\"font-size: 9.5652173913043pt;\" aria-label=\"Health (2 items)\">Health<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/higher-education\/\" class=\"tag-cloud-link tag-link-195 tag-link-position-21\" style=\"font-size: 8pt;\" aria-label=\"higher education (1 item)\">higher education<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/housing\/\" class=\"tag-cloud-link tag-link-13 tag-link-position-22\" style=\"font-size: 18pt;\" aria-label=\"Housing (27 items)\">Housing<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/human-development\/\" class=\"tag-cloud-link tag-link-100 tag-link-position-23\" style=\"font-size: 15.652173913043pt;\" aria-label=\"Human Development (14 items)\">Human Development<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/india\/\" class=\"tag-cloud-link tag-link-182 tag-link-position-24\" style=\"font-size: 8pt;\" aria-label=\"India (1 item)\">India<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/industrial-policy\/\" class=\"tag-cloud-link tag-link-80 tag-link-position-25\" style=\"font-size: 9.5652173913043pt;\" aria-label=\"Industrial Policy (2 items)\">Industrial Policy<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/institutional-structures\/\" class=\"tag-cloud-link tag-link-197 tag-link-position-26\" style=\"font-size: 8pt;\" aria-label=\"institutional structures (1 item)\">institutional structures<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/instructional-design\/\" class=\"tag-cloud-link tag-link-150 tag-link-position-27\" style=\"font-size: 9.5652173913043pt;\" aria-label=\"Instructional Design (2 items)\">Instructional Design<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/ipcc\/\" class=\"tag-cloud-link tag-link-126 tag-link-position-28\" style=\"font-size: 9.5652173913043pt;\" aria-label=\"IPCC (2 items)\">IPCC<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/knowledge\/\" class=\"tag-cloud-link tag-link-143 tag-link-position-29\" style=\"font-size: 10.608695652174pt;\" aria-label=\"Knowledge (3 items)\">Knowledge<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/land\/\" class=\"tag-cloud-link tag-link-108 tag-link-position-30\" style=\"font-size: 19.565217391304pt;\" aria-label=\"Land (42 items)\">Land<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/non-economic-loss\/\" class=\"tag-cloud-link tag-link-194 tag-link-position-31\" style=\"font-size: 8pt;\" aria-label=\"Non-Economic Loss &quot; (1 item)\">Non-Economic Loss &quot;<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/pedagogy\/\" class=\"tag-cloud-link tag-link-196 tag-link-position-32\" style=\"font-size: 8pt;\" aria-label=\"pedagogy (1 item)\">pedagogy<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/planning\/\" class=\"tag-cloud-link tag-link-106 tag-link-position-33\" style=\"font-size: 17.565217391304pt;\" aria-label=\"Planning (24 items)\">Planning<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/policies\/\" class=\"tag-cloud-link tag-link-146 tag-link-position-34\" style=\"font-size: 10.608695652174pt;\" aria-label=\"Policies (3 items)\">Policies<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/population-mapping\/\" class=\"tag-cloud-link tag-link-184 tag-link-position-35\" style=\"font-size: 8pt;\" aria-label=\"population mapping (1 item)\">population mapping<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/poverty-and-inequality\/\" class=\"tag-cloud-link tag-link-101 tag-link-position-36\" style=\"font-size: 17.391304347826pt;\" aria-label=\"Poverty and Inequality (23 items)\">Poverty and Inequality<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/research-communication\/\" class=\"tag-cloud-link tag-link-199 tag-link-position-37\" style=\"font-size: 8pt;\" aria-label=\"Bet365 लाइव क्रिकेट स्ट्रीमिंग Communication (1 item)\">Bet365 लाइव क्रिकेट स्ट्रीमिंग Communication<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/risk\/\" class=\"tag-cloud-link tag-link-97 tag-link-position-38\" style=\"font-size: 16.521739130435pt;\" aria-label=\"Risk (18 items)\">Risk<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/scholarly-publishing\/\" class=\"tag-cloud-link tag-link-130 tag-link-position-39\" style=\"font-size: 9.5652173913043pt;\" aria-label=\"Scholarly Publishing (2 items)\">Scholarly Publishing<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/science-gaps\/\" class=\"tag-cloud-link tag-link-193 tag-link-position-40\" style=\"font-size: 8pt;\" aria-label=\"Science Gaps (1 item)\">Science Gaps<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/sustainability\/\" class=\"tag-cloud-link tag-link-93 tag-link-position-41\" style=\"font-size: 12.782608695652pt;\" aria-label=\"Sustainability (6 items)\">Sustainability<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/transport\/\" class=\"tag-cloud-link tag-link-95 tag-link-position-42\" style=\"font-size: 12.173913043478pt;\" aria-label=\"Transport (5 items)\">Transport<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/urban-equality\/\" class=\"tag-cloud-link tag-link-198 tag-link-position-43\" style=\"font-size: 8pt;\" aria-label=\"urban equality (1 item)\">urban equality<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/urbanisation\/\" class=\"tag-cloud-link tag-link-88 tag-link-position-44\" style=\"font-size: 12.782608695652pt;\" aria-label=\"Urbanisation (6 items)\">Urbanisation<\/a>\n<a href=\"https:\/\/iihs.co.in\/knowledge-gateway\/tag\/water-and-sanitation\/\" class=\"tag-cloud-link tag-link-96 tag-link-position-45\" style=\"font-size: 17.826086956522pt;\" aria-label=\"Water and Sanitation (26 items)\">Water and Sanitation<\/a><\/div>\n<\/div><\/div><\/p>\n<\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p><em>R. K. Gulati, Ranjan Gupta, Pradeep Gothoskar, Shyam Khobragade<\/em><\/p>\n<hr\/>\n","protected":false},"author":6,"featured_media":11835,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[71],"tags":[],"class_list":["post-14347","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paper"],"_links":{"self":[{"href":"https:\/\/iihs.co.in\/knowledge-gateway\/wp-json\/wp\/v2\/posts\/14347","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/iihs.co.in\/knowledge-gateway\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/iihs.co.in\/knowledge-gateway\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/iihs.co.in\/knowledge-gateway\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/iihs.co.in\/knowledge-gateway\/wp-json\/wp\/v2\/comments?post=14347"}],"version-history":[{"count":0,"href":"https:\/\/iihs.co.in\/knowledge-gateway\/wp-json\/wp\/v2\/posts\/14347\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/iihs.co.in\/knowledge-gateway\/wp-json\/wp\/v2\/media\/11835"}],"wp:attachment":[{"href":"https:\/\/iihs.co.in\/knowledge-gateway\/wp-json\/wp\/v2\/media?parent=14347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/iihs.co.in\/knowledge-gateway\/wp-json\/wp\/v2\/categories?post=14347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/iihs.co.in\/knowledge-gateway\/wp-json\/wp\/v2\/tags?post=14347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}