{"id":953,"date":"2016-09-06T15:48:41","date_gmt":"2016-09-06T13:48:41","guid":{"rendered":"http:\/\/www.supagro.fr\/wordpress\/modeleco\/?page_id=953"},"modified":"2019-06-28T14:14:28","modified_gmt":"2019-06-28T12:14:28","slug":"erreur-dun-etudiant","status":"publish","type":"page","link":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/auto-formation\/sequence1\/cours2-introduction-a-gams\/lecon8\/erreur-dun-etudiant\/","title":{"rendered":"Activity 8C : \u00ab Wheat\/maize \u00bb model \u2013 An error without an error message"},"content":{"rendered":"<h4 style=\"text-align: right\"><u>Length : around 10 minutes<\/u><\/h4>\n<p>A student has developed the Wheat\/Maize farm model but has made a slightly unusual error. The optimum results do not resemble those of the initial model. Download the model <a href=\"http:\/\/www.supagro.fr\/ModelEco\/en\/modeles\/modelEco_studentError.zip\">primal1_erreurEtudiant.zip<\/a>, run it and find that error.<\/p>\n<p>Reminder of the problem statement :<\/p>\n<p><strong><em>\u00a0<\/em><em>\u00ab\u00a0A given farm can grow two types of crop : wheat and maize. The area to be cultivated must be determined for each crop, knowing that :<br \/>\nThe objective of the farmer is to maximize his income.<br \/>\nWheat yields 450\u20ac per hectare, maize 1000\u20ac.<br \/>\nWheat requires 25 hours of labour per hectare and per year, and maize 50 hours.<br \/>\nThe farm area is 50 ha and the farmer can work 2000 hours a year.\u00a0\u00bb<\/em><\/strong><\/p>\n<p><em><strong><br \/>\n<\/strong><\/em><em><strong>Once you have found the error, check the solution :<\/strong><\/em><\/p>\n<p><strong><em>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/em><\/strong> <a href=\"http:\/\/www.supagro.fr\/wordpress\/modelecoen\/auto-formation\/sequence1\/cours2-introduction-a-gams\/pour-mentrainer\/pour-mentrainer-erreur-dun-etudiant\/solution-erreur-dun-etudiant\/\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"http:\/\/www.supagro.fr\/wordpress\/modeleco\/files\/2016\/08\/solution.png\" alt=\"solutions\" width=\"108\" height=\"53\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.supagro.fr\/wordpress\/modelecoen\/auto-formation\/sequence1\/cours2-introduction-a-gams\/\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4121 alignright\" src=\"http:\/\/www.supagro.fr\/wordpress\/modelecoen\/files\/2018\/11\/backUnit.png\" alt=\"\" width=\"211\" height=\"66\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Length : around 10 minutes A student has developed the Wheat\/Maize farm model but has made a slightly unusual error. The optimum results do not resemble those of the initial model. Download the model primal1_erreurEtudiant.zip, run it and find that <a class=\"more-link\" href=\"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/auto-formation\/sequence1\/cours2-introduction-a-gams\/lecon8\/erreur-dun-etudiant\/\">Continue reading <span class=\"screen-reader-text\">  Activity 8C : \u00ab Wheat\/maize \u00bb model \u2013 An error without an error message<\/span><span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":92,"featured_media":0,"parent":115,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-953","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/953","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/users\/92"}],"replies":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/comments?post=953"}],"version-history":[{"count":23,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/953\/revisions"}],"predecessor-version":[{"id":4669,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/953\/revisions\/4669"}],"up":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/115"}],"wp:attachment":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/media?parent=953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}