03 Memory Concepts

8/17/2019 03 Memory Concepts

1/15

Edy ?, 6847 > fit eiorcocjtrcaakrs 4

>-fit>-fit eiorcocjtrcaakrseiorcocjtrcaakrs


2/15


D`kjbd…

Ekecry ocjokpts ij >8;4


3/15

Edy ?, 6847 > fit eiorcocjtrcaakrs ?

Rnk >8;4 nds tnrkk kry `kjkrda typks c! ekecry" Rck!!kotikay prc`rde tnk >8;4 it is jkokssdry tc ndk d fdsio

#jbkrstdjbij` c! tnksk ekecry typks" Rnk ekecry typks

drk iaa#strdtkb ij tnk !caac$ij` `rdpnio" Rnky drk% &j-'nip

Ekecry, ()tkrjda 'cbk Ekecry, djb ()tkrjda *DE"

Rypks cg Ekecry…


4/15

Edy ?, 6847 > fit eiorcocjtrcaakrs +

Cj-Onip Ekecry rk!krs tc djy ekecry 'cbk, *DE, crctnkr tndt pnysiodaay k)ists $itnij tnk eiorcocjtrcaakr itska!"

Kxtkrjda Ocbk Ekecry is ocbk cr prc`rde ekecry tndt

rksibks c!!-onip" Rnis is c!tkj ij tnk !cre c! dj k)tkrjda

(.*&E"

Kxtkrjda VDE is *DE ekecry tndt rksibks c!!-onip" Rnis

is c!tkj ij tnk !cre c! stdjbdrb stdtio *DE cr !adsn *DE"


5/15

Edy ?, 6847 > fit eiorcocjtrcaakrs ;

'cbk ekecry is tnk ekecry tndt ncabs tnk dot#da >8;4

prc`rde tndt is tc fk r#j" Rnis ekecry is aieitkb tc 7+/djb oceks ij edjy sndpks djb siks%

'cbk ekecry edy fk !c#jb cj-onip, kitnkr f#rjkb ijtc tnk

eiorcocjtrcaakr ds *&E cr (.*&E"

'cbk edy dasc fk stcrkb ocepaktkay cgg-onip ij dj k)tkrjda

*&E cr, ecrk oceecjay, dj k)tkrjda (.*&E"

adsn *DE is dasc djctnkr pcp#adr ektncb c! stcrij` d

prc`rde" dric#s ocefijdticjs c! tnksk ekecry typks edydasc fk #skb--tndt is tc sdy, it is pcssifak tc ndk +/ c! ocbk

ekecry cj-onip djb 7+ c! ocbk ekecry cgg-onip ij dj

(.*&E"


6/15


Ds dj cfic#s cppcsitk c! Ijtkrjda VDE , tnk >8;4 dascs#ppcrts $ndt is odaakb Kxtkrjda VDE "

Ds tnk jdek s#``ksts, ()tkrjda *DE is djy rdjbce

dookss ekecry $nion is !c#jb cgg-onip" 2ijok tnk

ekecry is c!!-onip it is jct ds !ak)ifak ij tkres c!dookssij`, djb is dasc sac$kr" cr k)depak, tc ijorkekjt

dj jtkrjda *DE acodticj fy 4 rk#irks cjay 4 ijstr#oticj

djb 4 ijstr#oticj oyoak" Rc ijorkekjt d 4-fytk da#k

stcrkb ij ()tkrjda *DE rk#irks + ijstr#oticjs djb 0ijstr#oticj oyoaks" j tnis odsk, k)tkrjda ekecry is 0

tieks sac$kr


7/15


Ds ekjticjkb dt tnk fkìjjij` c! tnis ondptkr, tnk >8;4

ijoa#bks d okrtdij dec#jt c! cj-onip ekecry" &j-onipekecry is rkdaay cjk c! t$c typks% jtkrjda *DE djb

2pkoida #joticj *kìstkr 2* ekecry"

Ijtkrjda VDE < t is cr`djikb ijtc tnrkk drkds

4" ?6 fytks 88n tc4n - + `kjkrda p#rpcsk rkìstkr

fdjs j#efkrkb 8 tc ? djb kdon edbk #p c! ki`nt rkìstkrs

jdekb *8 tc *0"

6"9it dbbrkssdfak drkd c! 47 fytks coo#piks *DE fytkdbbrkss 68n tc6n"

?"


8/15

Edy ?, 6847 > fit eiorcocjtrcaakrs >

Rnk adyc#t c! tnk >8;4=s ijtkrjda ekecry is

prkskjtkb ij tnk !caac$ij` ekecry edp%


9/15


Rnk 46> fytks c! ijtkrjda VDE is s#fbiibkb ds snc$j cj

tnk ekecry edp" Rnk !irst > fytks 88n - 80n drk5rkìstkr fdj 85" 9y edjip#adtij` okrtdij 2*s, d

prc`rde edy onccsk tc #sk rkìstkr fdjs 4, 6, cr ?" Rnksk

datkrjdtik rkìstkr fdjs drk acodtkb ij ijtkrjda *DE ij

dbbrkssks 8>n tnrc#`n 4n"

9it Ekecry dasc aiks djb is pdrt c! ijtkrjda *DE

Rnk >8 fytks rkedijij` c! jtkrjda *DE, !rce dbbrkssks

?8n tnrc#`n 0n, edy fk #skb fy #skr dridfaks tndt jkkb

tc fk dooksskb !rk#kjtay cr dt ni`n-spkkb" Rnis drkd isdasc #tiaikb fy tnk eiorcocjtrcaakr ds d stcrd`k drkd !cr

tnk cpkrdtij` stdom.


10/15


Vkistkr !dj"s…

:Rnkrk drk !c#r rkìstkr fdjs

:*8, *4 ,*6 3 *?

:(don c! > rkìstkrs c! > fits kdon"

:*8 is tnk bk!d#at rkìstkr fdj"

:Rnk ocjokpt c! rkìstkr fdjs dbbs d `rkdt akka c!

!ak)ifiaity tc tnk >8;4, kspkoidaay $nkj bkdaij` $itn

ijtkrr#pts


11/15


!it Ekecry

:Rnk >8;4, fkij` d ocee#jiodticjs-crikjtkb

eiorcocjtrcaakr, `iks tnk #skr tnk dfiaity tc dookss d

j#efkr c! fit vdridfaks" Rnksk dridfaks edy fk kitnkr 4

cr 8"

:Rnkrk drk 46> fit dridfaks ddiadfak tc tnk #skr" Rnk

#skr edy edk #sk c! tnksk dridfaks $itn oceedjbs

s#on ds 2(R9 djb 'H*"

:9it Ekecry is rkdaay d pdrt c! jtkrjda *DE" j !dot,tnk 46> fit dridfaks coo#py tnk 47 fytks c! jtkrjda

*DE !rce 68n tnrc#`n 6n "


12/15


#pk$ida %&j$ticj Vkistkr '#%V(

Ekecry 2pkoida #joticj *k`istkrs 2*s drk drkds c!

ekecry tndt ocjtrca spkoi!io !#joticjdaity c! tnk

>8;4 prcoksscr" cr k)depak, !c#r 2*s pkreit

dookss tc tnk >8;4s ?6 ijp#tFc#tp#t aijks" Djctnkr

2* daac$s d prc`rde tc rkdb cr $ritk tc tnk

>8;4s skrida pcrt" &tnkr 2*s daac$ tnk #skr tc

skt tnk skrida fd#b rdtk, ocjtrca djb dookss tiekrs,

djb ocj!i`#rk tnk >8;4s ijtkrr#pt systke" (don

2* nds dj dbbrkss >8n tnrc#`n n djb djdek" Rnk dbbrkss rdj`k c! >8n tnrc#`n n c!!kr

46> pcssifak dbbrkssks, tnkrk drk cjay 64 2*s ij

d stdjbdrb >8;4"


13/15

Edy ?, 6847 > fit eiorcocjtrcaakrs 4?

Daa ctnkr dbbrkssks ij tnk 2* rdj`k >8n tnrc#`n n

drk ocjsibkrkb ijdaib" Oritij` tc cr rkdbij` !rce tnksk

rk`istkrs edy prcb#ok #jbk!ijkb da#ks cr fkndicr"


14/15

Edy ?, 6847 > fit eiorcocjtrcaakrs 4+

#td$" djb #td$" )cijtkr

#td$" - Dj drkd c! ijtkrjda *DE tndt is #skb ij

ocjB#joticj $itn okrtdij cpocbks tc stcrk djb rktrikk

bdtd #ioay"

#td$" )cijtkr - t is dj >-fit rk`istkr tc ncab dj ijtkrjda

*DE dbbrkss tndt is odaakb tcp - c! - stdo"


15/15

Edy ?, 6847 > fit eiorcocjtrcaakrs 4;

.rc`rde ni`nkr tndj 8n od#sks tnk >8;4 tc

d#tcedtiodaay !kton ocbk fytks !rce k)tkrjda prc`rde

ekecry"

'cbk fytks odj dasc fk !ktonkb k)oa#sikay !rce k)tkrjda

ekecry dbbrkssks 8888n tc n fy ocjjkotij` tnk

k)tkrjda dookss (D pij ?4 tc `rc#jb"

Ijtkrjda VCE '**** tc *%%%n(

03 Memory Concepts

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