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Artificial Neural Network
Vajiheh Zoghiyan
Dec. 2013
1Gathered by: Vajiheh Zoghiyan
‫ها‬ ‫ورودی‬ ‫یا‬ ‫دندریت‬
(‫سیگنال‬ ‫دریافت‬ ‫مناطق‬‫های‬
‫الکتروشیمیایی‬)
Soma
‫پردازش‬ ‫را‬ ‫ورودی‬ ‫که‬
‫کند‬ ‫می‬
‫اکسون‬:‫سیگنال‬
‫الکتروشیمیایی‬
‫هسته‬ ‫از‬ ‫دریافتی‬
‫سلول‬(‫ورودی‬)‫به‬
‫می‬ ‫منتقل‬ ‫خروجی‬
‫شود‬
‫سیناپس‬:‫تالقی‬ ‫محل‬
‫یک‬ ‫از‬ ‫اکسون‬ ‫یک‬
‫سلول‬ ‫دندریت‬ ‫به‬ ‫سلول‬
‫دیگر‬(‫نرون‬ ‫یک‬ ‫خروجی‬
‫منتقل‬ ‫بعدی‬ ‫نرون‬ ‫به‬
‫شود‬ ‫می‬)
‫عصبی‬ ‫نرون‬ ‫یک‬ ‫ساختار‬
2Gathered by: Vajiheh Zoghiyan
X₀=1 W₀=b



Threshold
W₁
W₂
Wᵪ
X₁
X₂
Xᵪ



𝑟=0
𝑋
𝑊᷊ 𝑋᷊ Output(y)
If ∑>T then output=1
Otherwise output=0
3Gathered by: Vajiheh Zoghiyan
4Gathered by: Vajiheh Zoghiyan
‫فعالیت‬ ‫تابع‬ ‫انواع‬
5Gathered by: Vajiheh Zoghiyan
Activation function
transfer function:
• Hardlim
• hardlims
• Purelin
6Gathered by: Vajiheh Zoghiyan
Activation function
• Satlin:
• Satlins:
7
• Logsig:
• Tansig:
Gathered by: Vajiheh Zoghiyan
• Command line solution
• Graphical user interface: nftool
• nntool
8
There are 3 simple ways to solve a neural network
problem in Matlab
Gathered by: Vajiheh Zoghiyan
9
‫شروع‬
‫ها‬ ‫وزن‬ ‫تصادفی‬ ‫انتخاب‬
‫خروجی‬ ‫محاسبه‬ ‫و‬ ‫ورودی‬ ‫الگوی‬ ‫اعمال‬
‫ها‬ ‫وزن‬ ‫رسانی‬ ‫روز‬ ‫به‬
‫های‬ ‫الگو‬ ‫همه‬
‫اعمال‬ ‫ورودی‬
‫اند؟‬ ‫شده‬
‫معیار‬ ‫بررسی‬
‫توقف‬
‫پایان‬
‫بل‬‫ه‬
‫بل‬‫ه‬
‫خیر‬
‫خیر‬
‫خطا‬ ‫انتشار‬ ‫پس‬ ‫الگوریتم‬
Gathered by: Vajiheh Zoghiyan
10Gathered by: Vajiheh Zoghiyan
11Gathered by: Vajiheh Zoghiyan
12Gathered by: Vajiheh Zoghiyan
13Gathered by: Vajiheh Zoghiyan
14
Gathered by: Vajiheh Zoghiyan
15Gathered by: Vajiheh Zoghiyan
16Gathered by: Vajiheh Zoghiyan
17Gathered by: Vajiheh Zoghiyan
18Gathered by: Vajiheh Zoghiyan
19Gathered by: Vajiheh Zoghiyan
20Gathered by: Vajiheh Zoghiyan
21Gathered by: Vajiheh Zoghiyan
22Gathered by: Vajiheh Zoghiyan
23Gathered by: Vajiheh Zoghiyan
24Gathered by: Vajiheh Zoghiyan
25Gathered by: Vajiheh Zoghiyan
26Gathered by: Vajiheh Zoghiyan
27Gathered by: Vajiheh Zoghiyan
28Gathered by: Vajiheh Zoghiyan
29Gathered by: Vajiheh Zoghiyan
30Gathered by: Vajiheh Zoghiyan
31Gathered by: Vajiheh Zoghiyan
32Gathered by: Vajiheh Zoghiyan

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Artificial neural network