11. الرياضي التمثيللعصبون
10،حزيران16 Dr. Farhan Alfin 13 Slides 11
j
jiji aWin ,
aj :Activation value of unit j
wj,I :Weight on the link from unit j to unit i
inI :Weighted sum of inputs to unit i
aI :Activation value of unit i
g :Activation function
12. 10،حزيران16 Dr. Farhan Alfin 13 Slides 12
Input
values
weights
Summing
function
Bias
b
Activation
functionLocal
Field
v
Output
y
x1
x2
xm
w2
wm
w1
)(
………….
13. التفعيل تابعactivation function
10،حزيران16 Dr. Farhan Alfin 13 Slides 13
•س ومشتقه لالشتقاق ًالوقاب ًامستمر ًاتابع يكون أنالحساب هل.
•متناقص غير ًاانسيابي يكون أن.
Linear Activation Function
y = x
31. أمثلة
• R. RUAN, S. ALMAER, and J. ZHANG, 1995, Prediction of Dough
Rheological Properties Using Neural Networks, Cereal Chemistry
72(3):308-311.
• Y. R. CHEN,' S. R. DELWICHE,I and W. R. HRUSCHKA, 1995,
Classification of Hard Red Wheat by Feedforward Backpropagation
Neural Networks, Cereal Chemistry 72(3):317-319.
• Fang Qi , Gerald Biby, Ekramul Haque, Milford A. Hanna, and
Charles K. Spillman, 1998, Neural Network Modeling of Physical
Properties of Ground Wheat, Cereal Chemistry 75(2):251-253
• E. Razmi-Rad, B. Ghanbarzadeh, S.M. Mousavi, Z. Emam-Djomeh,
J. Khazaei, 2007, Prediction of rheological properties of Iranian bread
dough from chemical composition of wheat flour by using artificial
neural networks, Journal of Food Engineering, 81:728-734.
10،حزيران16 Dr. Farhan Alfin 13 Slides 31