CS404 Exam#2-110304_1

# CS404 Exam#2-110304_1 - 1. a) Skipthis was on the first...

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1. a) Skip…this was on the first test – see jpg test b) Pos (1 3/7 / 1) Neg(2 / 0) 2. a) x*v + v0 = [1.2 6 –11.6] + [-1 0 3]= [0.2 6 -8.6]=z_in z=sigmoid(z_in)=[0.45 0.002 0.999] z*w + w0 = 1.9058 + (1)=2.9058=y_in y=3*(y_in) + 1=9.7174 b) W = alpha*delta*z, where… alpha = 0.2 delta = (target – actual)*f’(y_in) = -8.7174*(y*(1-y))= -8.7174*(9.7174*-8.7174)=738.46 z= [0.45 0.002 0.999] 3. 4. a) total non-correct classifications = 5 + 2 + 13 + 22 + 12 = 54 total cost = 54*3=162 b) I would choose the neural network, as it has a lower cost associated with it c) cost for misclassifying class 3 = 12*1=12

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## This note was uploaded on 08/25/2011 for the course CPE 404 taught by Professor Merz during the Fall '09 term at Missouri S&T.

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CS404 Exam#2-110304_1 - 1. a) Skipthis was on the first...

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