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PERCEPTRON

PERCEPTRON. Konsep Dasar. Diusulkan oleh: Rosenblatt (1962) Minsky and Papert (1960, 1988) Rancangan awal: Terdiri dari 3 layer: Sensory unit Associator unit Response unit. Fungsi aktivasi. Sensory unit  binary function Associator unit  binary function Response unit.

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PERCEPTRON

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  1. PERCEPTRON

  2. Konsep Dasar • Diusulkan oleh: • Rosenblatt (1962) • Minsky and Papert (1960, 1988) • Rancangan awal: • Terdiri dari 3 layer: • Sensory unit • Associator unit • Response unit

  3. Fungsi aktivasi • Sensory unit  binary function • Associator unit  binary function • Response unit  Adalah threshold

  4. x1 y1 z1 x2 y2 z2 xn yn zm Arsitektur dasar

  5. Arsitektur yg disederhanakan 1 b x1 w1 f(u) Y w2 x2 wn xn

  6. Algoritma Perlatihan Step0Inisialisasi weights & bias (ambil saja 0) Buat nilai  (0 <   1) (ambil saja 1) Step1 While (Stop = False) do Step 2-6 Step2 Untuk setiap pasangan (s:t) doStep 3-5 Step3 xi = si Step4

  7. Algoritma Perlatihan Step5 if y  t wi(new)=wi(old) + txi b(new) = b(old) +t else wi(new)=wi(old) b(new) = b(old) Step6 If no weights changed in Step2  Stop = True Else  False

  8. Contoh Kasus • Perceptron sebagai fungsi AND 1 Ambil: =1 =0.2 1 x1 f(u) w1 u x2 w2

  9. Blanko isian

  10. Epoch • Pengisian blanko tsb akan terus berlanjut sampai tidak ada perubahan bobot. • Karena proses berulang terus, maka kalau dikerjakan manual  rawan salah dan membosankan. • Perlu program komputer.

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