1 Pertemuan 11 OPTIMASI KINERJA Matakuliah: H0434/Jaringan Syaraf Tiruan Tahun: 2005 Versi: 1
2 Learning Outcomes Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : Menjelaskan konsep optimasi kinerja.
3 Outline Materi Steepest Descent Method. Contoh Aplikasi.
4 Basic Optimization Algorithm p k - Search Direction k - Learning Rate or
5 Steepest Descent Choose the next step so that the function decreases: For small changes in x we can approximate F(x): where If we want the function to decrease: We can maximize the decrease by choosing:
6 Example
7 Plot
8 Newton’s Method Take the gradient of this second-order approximation and set it equal to zero to find the stationary point:
9 Example
10 Plot
11 Non-Quadratic Example Stationary Points: F(x)F(x)F2(x)F2(x)