One Hidden Layer Neural Network Neural Networks Overview
One hidden layer Neural Network Neural Networks deeplearning.ai Overview What is a Neural Network? !" !# %& !$ x w ' = )*! + , - = .(') ℒ(-, %) b !" !# %& !$ x ["] ["] ["] ["] ["] ["] [#] [#] ["] [#] [#] [#] [#] 4 ' = 4 ! + , - = .(' ) ' = 4 - + , - = .(' ) ℒ(- , %) ,["] 4[#] ,[#] Andrew Ng One hidden layer Neural Network Neural Network deeplearning.ai Representation Neural Network Representation !" !# %& !$ Andrew Ng One hidden layer Neural Network Computing a deeplearning.ai Neural Network’s Output Neural Network Representation !" !" !# )!! + + -(') , = %& !# %& ' , !$ !$ ' = )!! + + , = -(') Andrew Ng Neural Network Representation $( $( $) #!$ + & +(!) ' = ./ $) ./ ! ' $* $* ! ! = # $ + & $( ' = +(!) $) ./ $* Andrew Ng Neural Network Representation " " " , ["] ["] " '" )" = +" ! + /" , ' " = 3()" ) !" " " " , ["] ["] " '# )# = +# ! + /# , ' # = 3()# ) ! %& # " " " , ["] ["] " '$ )$ = +$ ! + /$ , ' $ = 3()$ ) !$ " " " , ["] ["] " '( )( = +( ! + /( , ' ( = 3()( ) Andrew Ng Neural Network Representation learning ( " " Given input x: %" ( " , ! " = $ " % + ' " % ./ , " (- " " %- ( = )(! ) " (0 ! , = $ , ( " + ' , ( , = )(! , ) Andrew Ng One hidden layer Neural Network Vectorizing across deeplearning.ai multiple examples Vectorizing across multiple examples ' " = ) " ! + + " !" , " = -(' " ) %& !# ' # = ) # , " + + # ! $ , # = -(' # ) Andrew Ng Vectorizing across multiple examples for i = 1 to m: ! " ($) = ' " (($) + * " + " ($) = ,(! " $ ) ! - ($) = ' - + " ($) + * - + - ($) = ,(! - $ ) Andrew Ng One hidden layer Neural Network Explanation
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