{"id":773,"date":"2016-08-03T09:09:41","date_gmt":"2016-08-03T07:09:41","guid":{"rendered":"http:\/\/www.supagro.fr\/wordpress\/modeleco\/?page_id=773"},"modified":"2019-06-27T16:55:50","modified_gmt":"2019-06-27T14:55:50","slug":"concentre-alimentaire-animale","status":"publish","type":"page","link":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/auto-formation\/sequence1\/cours2-introduction-a-gams\/concentre-alimentaire-animale\/","title":{"rendered":"Writing the animal feed model"},"content":{"rendered":"

<\/h4>\n

Length : around 25 minutes<\/u><\/h4>\n

Write the following model using GAMS.<\/strong><\/p>\n

\"\"<\/p>\n

\u00ab\u00a0An animal feed company produces concentrates for cattle using various types of ingredients : protein crops (peas), cereal (maize) and cattle cake (soya-bean).<\/em><\/p>\n

The concentrates obtained must have a minimum guaranteed content of\u00a0 TNM (Total Nitrogenous Matter) and fat as well as maximum mineral matter and crude fibre contents.<\/em><\/p>\n\n\n\n\n
Maximum contents per kilo of concentrate<\/strong><\/td>\nTNM (g\/kg)<\/strong><\/td>\nFat (g\/kg)<\/strong><\/td>\n<\/tr>\n
<\/td>\n200<\/td>\n25<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n
Maximum contents per kilo of concentrate<\/strong><\/td>\nMineral matter (g\/kg)<\/strong><\/td>\nCrude fibre (g\/kg)<\/strong><\/td>\n<\/tr>\n
<\/td>\n70<\/td>\n65<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The contents of each of these components are known for every ingredient.<\/em><\/p>\n\n\n\n\n\n\n
Contents<\/td>\nTNM (g\/kg)<\/td>\nFat (g\/kg)<\/td>\nMineral matter (g\/kg)<\/td>\nCrude fibre (g\/kg)<\/td>\n<\/tr>\n
Maize<\/td>\n81<\/td>\n37<\/td>\n12<\/td>\n22<\/td>\n<\/tr>\n
Peas<\/td>\n207<\/td>\n10<\/td>\n30<\/td>\n52<\/td>\n<\/tr>\n
Soya-bean cakes<\/td>\n453<\/td>\n19<\/td>\n64<\/td>\n60<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Maize now costs 148\u20ac\/T, peas 195\u20ac\/T and soya-bean cakes 355\u20ac\/T.
\nThe company would like to find the optimum formulation of a kilo of concentrate in order to respect the guaranteed contents while minimizing production costs.\u00a0\u00bb<\/strong><\/em><\/p>\n

For help concerning the development of the model and\/or in order to use the same names for the data\/variables\/equations, click on \u201cHelp\u201d.\u00a0<\/strong><\/p>\n

\"\"<\/a>Once the model has been written, answer the following questions : What is the optimum formulation of a kilo of concentrate ? How much does it cost ?<\/strong>
\nClick on \u201cSolution\u201d and check that you have the same results.<\/strong><\/p>\n

\"\"<\/a>\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Length : around 25 minutes Write the following model using GAMS. \u00ab\u00a0An animal feed company produces concentrates for cattle using various types of ingredients : protein crops (peas), cereal (maize) and cattle cake (soya-bean). The concentrates obtained must have a Continue reading Writing the animal feed model<\/span>→<\/span><\/a><\/p>\n","protected":false},"author":92,"featured_media":0,"parent":33,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-773","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/773","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=773"}],"version-history":[{"count":37,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/773\/revisions"}],"predecessor-version":[{"id":4666,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/773\/revisions\/4666"}],"up":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/33"}],"wp:attachment":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/media?parent=773"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}