{"id":25508,"date":"2024-03-06T17:00:34","date_gmt":"2024-03-06T20:00:34","guid":{"rendered":"https:\/\/maurinsoft.com.br\/?p=25508"},"modified":"2024-03-06T17:29:05","modified_gmt":"2024-03-06T20:29:05","slug":"keras-topologia","status":"publish","type":"post","link":"https:\/\/maurinsoft.com.br\/wp\/keras-topologia\/","title":{"rendered":"Keras &#8211; Topologia"},"content":{"rendered":"\n<p>Topologia baseada em empilhamento<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>Modelo sequencial<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Densa &#8211; Totalmente conectada <\/li>\n\n\n\n<li>Embedding &#8211; <\/li>\n\n\n\n<li>Dropout &#8211; Remove conex\u00f5es aleat\u00f3rias<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Fun\u00e7\u00e3o de ativa\u00e7\u00e3o<\/h3>\n\n\n\n<p>Cada camada tem uma  fun\u00e7\u00e3o de ativa\u00e7\u00e3o.<\/p>\n\n\n\n<p>Entre elas:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>relu &#8211; camadas intermediarias ou ocultas, pois mostra os valores reais.<\/li>\n\n\n\n<li>sigmoid &#8211; Te da um valor de probabilidade 0-1<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Hiper par\u00e2metros<\/h3>\n\n\n\n<p>Afeta a performace da rede.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>LOSS &#8211; fun\u00e7\u00e3o de perda (mean_squared_error)<\/li>\n\n\n\n<li>Optimizer &#8211; Otimizador de ajuste de pesos da rede. ADAM (stochastic gradient descent)<\/li>\n\n\n\n<li>Metrics &#8211; Metrica de previs\u00e3o para apurar se esta certo.<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Exemplo de modelo <\/h4>\n\n\n\n<p>modelo = Sequental()<\/p>\n\n\n\n<p>modelo.add(tipo)<\/p>\n\n\n\n<p>modelo.add(Dropout(0.2))<\/p>\n\n\n\n<p>modelo.add(tipo)<\/p>\n\n\n\n<p>modelo.add(Dropout(0.2))<\/p>\n\n\n\n<p>modelo.add(tipo)<\/p>\n\n\n\n<p>modelo.add(Dropout(0.2))<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Tipos<\/strong>:<\/p>\n\n\n\n<p>#camadas intermediarias<\/p>\n\n\n\n<p>Dense(output_dim=10, input_dim=X_train.shape[1], activation=&#8217;relu&#8217;))<\/p>\n\n\n\n<p>#Camada de finaliza\u00e7\u00e3o<\/p>\n\n\n\n<p>Dense(output_dim=10, input_dim=X_train.shape[1], activation=&#8217;sigmoid&#8217;))<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Topologia baseada em empilhamento Modelo sequencial Fun\u00e7\u00e3o de ativa\u00e7\u00e3o Cada camada tem uma fun\u00e7\u00e3o de ativa\u00e7\u00e3o. Entre elas: Hiper par\u00e2metros Afeta a performace da rede. Exemplo de modelo modelo = Sequental() modelo.add(tipo) modelo.add(Dropout(0.2)) modelo.add(tipo) modelo.add(Dropout(0.2)) modelo.add(tipo) modelo.add(Dropout(0.2)) Tipos: #camadas intermediarias Dense(output_dim=10, input_dim=X_train.shape[1], activation=&#8217;relu&#8217;)) #Camada de finaliza\u00e7\u00e3o Dense(output_dim=10, input_dim=X_train.shape[1], activation=&#8217;sigmoid&#8217;))<\/p>\n","protected":false},"author":1,"featured_media":24233,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39,51],"tags":[231,389],"class_list":["post-25508","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ia","category-python","tag-ia","tag-tensorflow"],"_links":{"self":[{"href":"https:\/\/maurinsoft.com.br\/wp\/wp-json\/wp\/v2\/posts\/25508","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/maurinsoft.com.br\/wp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/maurinsoft.com.br\/wp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/maurinsoft.com.br\/wp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/maurinsoft.com.br\/wp\/wp-json\/wp\/v2\/comments?post=25508"}],"version-history":[{"count":7,"href":"https:\/\/maurinsoft.com.br\/wp\/wp-json\/wp\/v2\/posts\/25508\/revisions"}],"predecessor-version":[{"id":25519,"href":"https:\/\/maurinsoft.com.br\/wp\/wp-json\/wp\/v2\/posts\/25508\/revisions\/25519"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/maurinsoft.com.br\/wp\/wp-json\/wp\/v2\/media\/24233"}],"wp:attachment":[{"href":"https:\/\/maurinsoft.com.br\/wp\/wp-json\/wp\/v2\/media?parent=25508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/maurinsoft.com.br\/wp\/wp-json\/wp\/v2\/categories?post=25508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/maurinsoft.com.br\/wp\/wp-json\/wp\/v2\/tags?post=25508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}