T h e S t a t i s t i c a l L e a r n i n g T - - PowerPoint PPT Presentation

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T h e S t a t i s t i c a l L e a r n i n g T - - PowerPoint PPT Presentation

t h D I G S e mi n a r . S e p t e mb e r 6 , 2 0 1 8 T h e S t a t i s t i c a l L e a r n i n g T h e o r y i n P r a c t i c a l P r o b l e m s R o d r i g o F e r


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SLIDE 1

D I G S e mi n a r . S e p t e mb e r 6

t h

, 2 1 8

T h e S t a t i s t i c a l L e a r n i n g T h e

  • r

y i n P r a c t i c a l P r

  • b

l e m s

R

  • d

r i g

  • F

e r n a n d e s d e M e l l

  • U

n i v e r s i d a d e d e S ã

  • P

a u l

  • I

n s t i t u t

  • d

e C i ê n c i a s M a t e m á t i c a s e d e C

  • m

p u t a ç ã

  • D

e p a r t a m e n t

  • d

e C i ê n c i a s d e C

  • m

p u t a ç ã

  • h

t t p : / / w w w . i c m c . u s p . b r / ~ m e l l

  • m

e l l

  • @i

c m c . u s p . b r

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SLIDE 2

T h e

  • r

e t i c a l A s p e c t s

  • I

n t e r e s t e d i n i n t r

  • d

u c i n g m y r e s e a r c h i n t e r e s t s

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SLIDE 3

T h e

  • r

e t i c a l A s p e c t s

  • I

n t e r e s t e d i n i n t r

  • d

u c i n g m y r e s e a r c h i n t e r e s t s

  • Wh

a t a b e t t e r w a y t h a n t h e S t a t i s t i c a l L e a r n i n g T h e

  • r

y ?

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SLIDE 4

S t a t i s t i c a l L e a r n i n g T h e

  • r

y

M L P S V M I D 3 K N N J 4 8 C 4 . 5 D WN N C N N T e n s

  • r

F l

  • w
  • S
  • m

a n y c l a s s i fi c a t i

  • n

a l g

  • r

i t h m s :

  • H
  • w

c a n w e a s s e s s a n y

  • f

t h

  • s

e ?

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SLIDE 5

S t a t i s t i c a l L e a r n i n g T h e

  • r

y

M L P S V M I D 3 K N N J 4 8 C 4 . 5 D WN N C N N T e n s

  • r

F l

  • w
  • S
  • m

a n y c l a s s i fi c a t i

  • n

a l g

  • r

i t h m s :

  • H
  • w

c a n w e a s s e s s a n y

  • f

t h

  • s

e ?

– K

  • f
  • l

d c r

  • s

s v a l i d a t i

  • n

, l e a v e

  • n

e

  • u

t , . . .

  • H
  • w

c a n w e p r

  • v

e a n y

  • f

t h

  • s

e l e a r n ?

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SLIDE 6

S t a t i s t i c a l L e a r n i n g T h e

  • r

y

  • V

a p n i k p r

  • p
  • s

e d t h e S t a t i s t i c a l L e a r n i n g T h e

  • r

y

  • D

e fi n e d i n t h e c

  • n

t e x t

  • f

s u p e r v i s e d l e a r n i n g

  • L

e a r n i n g g u a r a n t e e s a n d c

  • n

d i t i

  • n

s

  • Wh

a t i s t h e m a i n c a l l ?

S a m p l e e r r

  • r

E x p e c t e d e r r

  • r

T h i s i s t h e c

  • n

c e p t

  • f

G e n e r a l i z a t i

  • n
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SLIDE 7

S t a t i s t i c a l L e a r n i n g T h e

  • r

y

  • S
  • w

h a t i s g e n e r a l i z a t i

  • n

?

  • C
  • n

s i d e r s

  • m

e

  • n

e h a s g i v e n y

  • u

a t e x t b

  • k
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SLIDE 8

S t a t i s t i c a l L e a r n i n g T h e

  • r

y : B i a s

  • V

a r i a n c e D i l e mma

  • A

n e x a m p l e b a s e d

  • n

r e g r e s s i

  • n

:

F i g u r e f r

  • m

L u x b u r g a n d S c h

  • l

k

  • p

f , S t a t i s t i c a l L e a r n i n g T h e

  • r

y : M

  • d

e l s , C

  • n

c e p t s , a n d R e s u l t s

Wh i c h f u n c t i

  • n

i s t h e b e s t ? T

  • a

n s w e r i t w e n e e d t

  • a

s s e s s t h e i r E x p e c t e d R i s k s

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SLIDE 9

S t a t i s t i c a l L e a r n i n g T h e

  • r

y : B i a s

  • V

a r i a n c e D i l e mma

  • T

h e d i c h

  • t
  • m

y a s s

  • c

i a t e d t

  • t

h e B i a s

  • V

a r i a n c e D i l e m m a

F

a l l

F F

a l l

F

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SLIDE 10

D i s t a n c e

  • We

i g h t e d N e a r e s t N e i g h b

  • r

s

  • B

a s e d

  • n

t h e s a m e p r i n c i p l e s a s t h e k

  • N

e a r e s t N e i g h b

  • r

s

A t t r i b u t e 1 A t t r i b u t e 2

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SLIDE 11

D i s t a n c e

  • We

i g h t e d N e a r e s t N e i g h b

  • r

s

  • B

a s e d

  • n

t h e s a m e p r i n c i p l e s a s t h e k

  • N

e a r e s t N e i g h b

  • r

s

N e w i n s t a n c e A t t r i b u t e 1 A t t r i b u t e 2

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SLIDE 12

D i s t a n c e

  • We

i g h t e d N e a r e s t N e i g h b

  • r

s

  • B

a s e d

  • n

t h e s a m e p r i n c i p l e s a s t h e k

  • N

e a r e s t N e i g h b

  • r

s

N e w i n s t a n c e S e t t i n g K = 3 S e t t i n g K = 5 S e t t i n g K = 6

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SLIDE 13

D i s t a n c e

  • We

i g h t e d N e a r e s t N e i g h b

  • r

s

  • I

t i s b a s e d

  • n

R a d i a l f u n c t i

  • n

s c e n t e r e d a t t h e n e w i n s t a n c e a . k . a . q u e r y p

  • i

n t

  • C

l a s s i fi c a t i

  • n
  • u

t p u t :

  • G

i v e n t h e w e i g h t f u n c t i

  • n

:

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SLIDE 14

D i s t a n c e

  • We

i g h t e d N e a r e s t N e i g h b

  • r

s

  • A

f t e r i m p l e m e n t i n g , t e s t i t

  • n

t h i s s i m p l e e x a m p l e

  • f

a n i d e n t i t y f u n c t i

  • n

: T w

  • m

a i n q u e s t i

  • n

s :

  • Wh

a t h a p p p e n s i f s i g m a i s t

  • b

i g ?

  • Wh

a t h a p p e n s i f s i g m a i s t

  • s

m a l l ? S

  • ,

h

  • w

c a n w e d e fi n e t h e b e s t v a l u e f

  • r

s i g m a ?

slide-15
SLIDE 15

D i s t a n c e

  • We

i g h t e d N e a r e s t N e i g h b

  • r

s

  • Wh

e n s i g m a t e n d s t

  • i

n fi n i t y

F

a l l

T h e s p a c e

  • f

a d m i s s i b l e f u n c t i

  • n

s ( b i a s ) w i l l c

  • n

t a i n a s i n g l e f u n c t i

  • n

I n t h i s c a s e , t h e a v e r a g e f u n c t i

  • n
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SLIDE 16

D i s t a n c e

  • We

i g h t e d N e a r e s t N e i g h b

  • r

s

  • Wh

e n s i g m a t e n d s t

  • i

n fi n i t y

slide-17
SLIDE 17

D i s t a n c e

  • We

i g h t e d N e a r e s t N e i g h b

  • r

s

  • Wh

e n s i g m a t e n d s t

  • z

e r

  • F

a l l

T h e s p a c e

  • f

a d m i s s i b l e f u n c t i

  • n

s ( b i a s ) w i l l t e n d t

  • t

h e w h

  • l

e s p a c e Wh a t i s t h e p r

  • b

l e m w i t h t h a t ? I t w i l l m

  • s

t p r

  • b

a b l y c

  • n

t a i n a t l e a s t

  • n

e m e m

  • r

y

  • b

a s e d c l a s s i fi e r

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SLIDE 18

D i s t a n c e

  • We

i g h t e d N e a r e s t N e i g h b

  • r

s

  • Wh

e n s i g m a t e n d s t

  • z

e r

slide-19
SLIDE 19

T h e

  • r

e t i c a l A s p e c t s

  • P

u t t i n g i n s i m p l e t e r m s :

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SLIDE 20

T h e

  • r

e t i c a l A s p e c t s

  • P

u t t i n g i n s i m p l e t e r m s :

  • I

n t e r e s t e d i n p r

  • v

i n g l e a r n i n g i n d i ff e r e n t s c e n a r i

  • s
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SLIDE 21

T h e

  • r

e t i c a l A s p e c t s

  • P

u t t i n g i n s i m p l e t e r m s :

  • I

n t e r e s t e d i n p r

  • v

i n g l e a r n i n g i n d i ff e r e n t s c e n a r i

  • s
  • B

u i l d i n g u p a t h e

  • r

e t i c a l f r a m e w

  • r

k t

  • p

r

  • v

e t i m e s e r i e s m

  • d

e l i n g

– I

d e a : u s e i t t

  • e

n s u r e c

  • n

c e p t d r i f t d e t e c t i

  • n
slide-22
SLIDE 22

T h e

  • r

e t i c a l A s p e c t s

  • P

u t t i n g i n s i m p l e t e r m s :

  • I

n t e r e s t e d i n p r

  • v

i n g l e a r n i n g i n d i ff e r e n t s c e n a r i

  • s
  • B

u i l d i n g u p a t h e

  • r

e t i c a l f r a m e w

  • r

k t

  • p

r

  • v

e t i m e s e r i e s m

  • d

e l i n g

– I

d e a : u s e i t t

  • e

n s u r e c

  • n

c e p t d r i f t d e t e c t i

  • n
  • T

h e

  • r

e t i c a l F r a m e w

  • r

k t

  • d

e s i g n D e e p L e a r n i n g a r c h i t e c t u r e s

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SLIDE 23

L i v i n g i n t h e P a s t . . .

  • S
  • m

e p r a c t i c a l r e s u l t s :

  • B

i

  • n

i c h a n d

– H

a r d w a r e u n d e r d e v e l

  • p

m e n t a t t h e n

  • r

t h e a s t

  • f

B r a z i l

– M

a i n l y t

  • s

u p p

  • r

t p e

  • p

l e l i v i n g i n e x t r e m e p

  • v

e r t y

  • T

i m e S e r i e s V i s u a l i z a t i

  • n

t

  • l

– w

w w . t s v i z . c

  • m

. b r

  • C
  • v

e r s

  • n

g i d e n t i fi c a t i

  • n

– S

u p p

  • r

t e d t h e E C A D s y s t e m , B r a z i l

  • C
  • p

y r i g h t

  • ffi

c e

  • f

s

  • n

g s i n B r a z i l

  • G
  • D

i g i t a l , B r a z i l – i n c

  • r

p

  • r

a t e d b y A c x i

  • m

, U S A

– M

a c h i n e L e a r n i n g f

  • r

g e

  • p
  • s

i t i

  • n

i n g s y s t e m s

– M

a r k e t i n g b a s e d

  • n

M L

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SLIDE 24

R e f e r e n c e s

  • V

a p n i k , V . T h e N a t u r e

  • f

t h e S t a t i s t i c a l L e a r n i n g , S p r i n g e r , 2 1 1

  • L

u x b u r g a n d S c h

  • l

k

  • p

f , S t a t i s t i c a l L e a r n i n g T h e

  • r

y : M

  • d

e l s , C

  • n

c e p t s , a n d R e s u l t s . H a n d b

  • k
  • f

t h e H i s t

  • r

y

  • f

L

  • g

i c . V

  • l

u m e 1 : I n d u c t i v e L

  • g

i c . V

  • l

u m e E d i t

  • r

s : D

  • v

M . G a b b a y , S t e p h a n H a r t m a n n a n d J

  • h

n Wo

  • d

s , E l s e v i e r , 2 9

  • S

c h ö l k

  • p

f , B . , S m

  • l

a , A . J . , L e a r n i n g Wi t h K e r n e l s : S u p p

  • r

t V e c t

  • r

M a c h i n e s , R e g u l a r i z a t i

  • n

, O p t i m i z a t i

  • n

, a n d B e y

  • n

d , M I T , 2 2

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SLIDE 25

R e f e r e n c e s