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Munich Personal RePEc Archive

Targeting information policy for

improved system performance

Temel, Tugrul

ECOREC Economic Research and Consulting

9 February 2013

Online at

https://mpra.ub.uni-muenchen.de/44303/

(2)

❚❛r❣❡t✐♥❣ ■♥❢♦r♠❛t✐♦♥ P♦❧✐❝② ❢♦r

■♠♣r♦✈❡❞ ❙②st❡♠ P❡r❢♦r♠❛♥❝❡

❚✉❣r✉❧ ❚❡♠❡❧

❊❈❖❘❊❈ ❊❝♦♥♦♠✐❝ ❘❡s❡❛r❝❤ ❛♥❞ ❈♦♥s✉❧t✐♥❣ ❲♦r❦✐♥❣ P❛♣❡r ◆♦✳ ✶✸✲✵✷

t✳t❡♠❡❧❅❡❝♦r❡❝✳♦r❣

❆❜str❛❝t

❚❤✐s ♣❛♣❡r ✐♥tr♦❞✉❝❡s ❛ ♠❡t❤♦❞ ❢♦r ❝❤❛r❛❝t❡r✐s✐♥❣ t❤❡ str✉❝t✉r❡ ♦❢ ❛ ♠✉❧t✐✲s❡❝t♦r ✐♥❢♦r✲ ♠❛t✐♦♥ s②st❡♠ ❛♥❞ ✐❧❧✉str❛t❡s ✐ts ❛♣♣❧✐❝❛t✐♦♥ ✐♥ ❢♦r♠✉❧❛t✐♥❣ t❡st❛❜❧❡ ❤②♣♦t❤❡s❡s ❛♥❞ t❛r❣❡t✐♥❣ ✐♥❢♦r♠❛t✐♦♥ ♣♦❧✐❝② ❢♦r ✐♠♣r♦✈❡❞ s②st❡♠ ♣❡r❢♦r♠❛♥❝❡✳ ❚❤✐s ❝❤❛r❛❝t❡r✐s❛t✐♦♥ ✐s ❛❝❝♦♠♣❧✐s❤❡❞ ❜② ✐❞❡♥t✐❢②✐♥❣ ✐♥❢♦r♠❛t✐♦♥ ❣❛♣s ❛♥❞ ❝❛✉s❡✲❡✛❡❝t ✐♥❢♦r♠❛t✐♦♥ ♣❛t❤✇❛②s ✐♥ t❤❡ s②st❡♠ ❝♦♥❝❡r♥❡❞✳ ❆♥ ❡①♣❡r✐♠❡♥t❛❧ ✇♦r❦s❤♦♣ ❛♥❞ ❛ q✉❡st✐♦♥♥❛✐r❡ ❛r❡ ❞❡s✐❣♥❡❞ t♦ ❣❛t❤❡r ❞❛t❛ ❢♦r t❤❡ ❛♣♣❧✐❝❛t✐♦♥ ♦❢ t❤❡ ♠❡t❤♦❞✳ ❚❤❡ ♠❡t❤♦❞ ❛❧❧♦✇s ♦♥❡ t♦ ❛♥❛❧②③❡ s②st❡♠ ✐♥❢♦r♠❛t✐♦♥ str✉❝t✉r❡ ❛♥❞ ♣❡r❢♦r✲ ♠❛♥❝❡ ✐♠♣❧✐❡❞ ❜② q✉❛❧✐t❛t✐✈❡ ❡①♣❡rt ❦♥♦✇❧❡❞❣❡✳

✖✖✖✖✖✖✖✖✖✖✖✖✖✖✖✖✲

❑❡②✇♦r❞s✿ ✐♥❢♦r♠❛t✐♦♥ s②st❡♠s✱ s②st❡♠ ❢♦r♠❛t✐♦♥ ❛♥❞ ♣❡r❢♦r♠❛♥❝❡✱ ✐♥st✐t✉t✐♦♥❛❧ ❛♥❞ ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ❛♥❛❧②s✐s✱ str✉❝t✉r❡✲❝♦♥❞✉❝t✲♣❡r❢♦r♠❛♥❝❡ ❛♣♣r♦❛❝❤

❏❊▲ ❈♦❞❡s✿ ❉✵✷✱ ❉✷✸✱ ❉✽✶✱ ❉✽✸✱ ❉✽✺✱ ❖✶✼✱ P✷

(3)

✶ ■♥tr♦❞✉❝t✐♦♥

❚❤✐s ♣❛♣❡r ✐♥tr♦❞✉❝❡s ❛ ♠❡t❤♦❞ ❢♦r ❝❤❛r❛❝t❡r✐s✐♥❣ t❤❡ str✉❝t✉r❡ ♦❢ ❛ ♠✉❧t✐✲s❡❝t♦r ✐♥❢♦r♠❛t✐♦♥ s②st❡♠ ❛♥❞ ✐❧❧✉str❛t❡s ✐ts ❛♣♣❧✐❝❛t✐♦♥ ✐♥ ❢♦r♠✉❧❛t✐♥❣ t❡st❛❜❧❡ ❤②♣♦t❤❡s❡s ❛♥❞ t❛r❣❡t✐♥❣ ✐♥❢♦r♠❛t✐♦♥ ♣♦❧✐❝② ❢♦r ✐♠♣r♦✈❡❞ s②st❡♠ ♣❡r❢♦r♠❛♥❝❡✳ ❚❤✐s ❝❤❛r❛❝t❡r✐s❛t✐♦♥ ✐❞❡♥t✐✜❡s ✐♥❢♦r♠❛t✐♦♥ ❣❛♣s ❛♥❞ ❝❛✉s❡✲❡✛❡❝t ✐♥❢♦r♠❛t✐♦♥ ♣❛t❤✇❛②s ✐♥ t❤❡ s②st❡♠ ❝♦♥❝❡r♥❡❞✱✶❞r❛✇✐♥❣ ♦♥ ❣r❛♣❤✲t❤❡♦r❡t✐❝ ❝♦♥❝❡♣ts ❛♥❞ ♣r✐♥❝✐♣❧❡s

♦❢ s②st❡♠s ❛♥❛❧②s✐s✳ ❆♥ ❡①♣❡r✐♠❡♥t❛❧ ✇♦r❦s❤♦♣✷❛♥❞ ❛ q✉❡st✐♦♥♥❛✐r❡ ❛r❡ ❞❡s✐❣♥❡❞ t♦ ❣❛t❤❡r ❞❛t❛ ❢♦r

t❤❡ ❛♣♣❧✐❝❛t✐♦♥ ♦❢ t❤❡ ♠❡t❤♦❞✳ ❚❤❡ ♠❡t❤♦❞ ❛❧❧♦✇s ♦♥❡ t♦ ❛♥❛❧②③❡ s②st❡♠s✬s ✐♥❢♦r♠❛t✐♦♥ str✉❝t✉r❡s ❛♥❞ ♣❡r❢♦r♠❛♥❝❡ ✐♠♣❧✐❡❞ ❜② q✉❛❧✐t❛t✐✈❡ ❡①♣❡rt ❦♥♦✇❧❡❞❣❡✳

❚❤❡ ♠❡t❤♦❞ st❛rts ✇✐t❤ ❛ ♠❛t❤❡♠❛t✐❝❛❧ ❞❡s❝r✐♣t✐♦♥ ♦❢ ❛ ❞②♥❛♠✐❝ ✐♥❢♦r♠❛t✐♦♥ s②st❡♠ ❝♦♥s✐st✐♥❣ ♦❢ ❛ s❡t ♦❢ ♥♦♥✲❧✐♥❡❛r ❞✐✛❡r❡♥❝❡ ❡q✉❛t✐♦♥s✳ ❚❤❡♥✱ t❤✐s s②st❡♠ ✐s ♣r❡s❡♥t❡❞ ✐♥ ❛ ♠❛tr✐① ❢♦r♠❛t✳ ◆❡①t✱ ✇✐t❤ ❛♥ ❡①♣❡r✐♠❡♥t❛❧ ✇♦r❦s❤♦♣✱ ❝r✐t✐❝❛❧ ❜✐♥❛r② ❝❛✉s❛❧ r❡❧❛t✐♦♥s ✭♦r ✐♥❢♦r♠❛t✐♦♥ ✢♦✇✮ ❛♥❞ ♣❛t❤✇❛②s ♦❢ r❡❧❛t✐♦♥s ❛r❡ ✐❞❡♥t✐✜❡❞✳ ❋✐♥❛❧❧②✱ t❤❡s❡ ❝r✐t✐❝❛❧ r❡❧❛t✐♦♥s ❛♥❞ ♣❛t❤✇❛②s ❛r❡ s✉❜st✐t✉t❡❞ ✐♥t♦ t❤❡ ✐♠♣❧✐❡❞ ✐♥❢♦r♠❛t✐♦♥ s②st❡♠ t♦ ❞❡r✐✈❡ t❤❡ r❡❞✉❝❡❞ ❢♦r♠ ♦❢ t❤❡ ✐♠♣❧✐❡❞ s②st❡♠ t❤❛t ✐s ✉s❡❞ t♦ ✐❞❡♥t✐❢② t❡st❛❜❧❡ ❤②♣♦t❤❡s❡s✳ ❊①♣❡rt ❦♥♦✇❧❞❣❡ ❣❛t❤❡r❡❞ t❤r♦✉❣❤ t❤❡ ✇♦r❦s❤♦♣ r❡♣r❡s❡♥ts t❤❡ ❦❡② ✐♥♣✉t ✉s❡❞ ✐♥ t❤❡ ❛♥❛❧②s✐s✳ ❚❤❡ ♠❡t❤♦❞ ❞❡✈❡❧♦♣❡❞ ❛❧❧♦✇s t♦ ❞✐s❡♥t❛♥❣❧❡ t❤❡ ✉♥♦❜s❡r✈❡❞ ❢r♦♠ t❤❡ ♦❜s❡r✈❡❞ ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ✉s✐♥❣ ❞❛t❛ ❣❛t❤❡r❡❞ ❜② ❛ q✉❡st✐♦♥♥❛✐r❡✳

❚❤❡ ✐❞❡❛ ❤❡r❡ ✐s ♥♦t ♥❡✇✳ ❊❝♦♥♦♠❡tr✐❝s ♣r♦✈✐❞❡s ❛ ✇✐❞❡ r❛♥❣❡ ♦❢ t❡❝❤♥✐q✉❡s✱ ✐♥❝❧✉❞✐♥❣ ❧♦❣✐t✱ ♣r♦❜✐t✱ ❛♥❞ ❞✐s❝r✐♠✐♥❛♥t ❛♥❛❧②s✐s✱ ❢♦r ❡st✐♠❛t✐♥❣ t❤❡ ♣r♦❜❛❜✐❧✐t② ❞✐str✐❜✉t✐♦♥ ✐♠♣❧✐❡❞ ❜② q✉❛❧✐t❛t✐✈❡ ❡①♣❡rt ❦♥♦✇❧❡❞❣❡✳ ❲❤❛t ✐s ♥❡✇ ❤❡r❡ ✐s t❤❡ ✇❛② ❛ ❝♦♠♣❧❡①✱ ❞②♥❛♠✐❝ ♠♦❞❡❧ ✐s tr❡❛t❡❞ ✐♥ ❛ ✇♦r❦s❤♦♣ s❡t✉♣ t♦ ♦❜t❛✐♥ ✐ts r❡❞✉❝❡❞ ❢♦r♠ ✐♠♣❧✐❡❞ ❜② ❡①♣❡rt ❦♥♦✇❧❡❞❣❡✱ ❛♥❞ t❤❡ ✇❛② ❤②♣♦t❤❡s❡s ❛r❡ ❞❡✈❡❧♦♣❡❞ t♦ t❡st t❤❡ ✉♥❞❡r❧②✐♥❣ ❝❤❛r❛❝t❡r✐st✐❝s ♦❢ t❤❡ s②st❡♠ ❝♦♥❝❡r♥❡❞✳ ❲✐t❤ t❤✐s ♠❡t❤♦❞✱ ❛ ❜r✐❞❣❡ ✐s ❡st❛❜❧✐s❤❡❞ t♦ ❝❧♦s❡ t❤❡ ❣❛♣ ❜❡t✇❡❡♥ t❤❡♦r❡t✐❝❛❧ ♠♦❞❡❧s ✭❧✐♥❡❛r ❛s ✇❡❧❧ ❛s ❛ s✉❜s❡t ♦❢ ♥♦♥✲❧✐♥❡❛r ♠♦❞❡❧s✮ ❛♥❞ t❤❡✐r ❝❤❛r❛❝t❡r✐s❛t✐♦♥ ✐♥ ❛ s♦❝✐❛❧ s❡t✉♣✱ s✉❝❤ ❛s ✇♦r❦s❤♦♣s ♦r ❡①♣❡rt ♣❛♥❡❧s ♦❢t❡♥ ❛❞♦♣t❡❞ ❛s t❤❡ ♠❡❛♥s ♦❢ ✐♥❢♦r♠❛t✐♦♥ ❝♦❧❧❡❝t✐♦♥ ❢♦r ♣♦❧✐❝② ❞❡s✐❣♥ ❛♥❞ r❡s❡❛r❝❤✳

❚❤❡ ❝❤❛♣t❡r ✐s ♦r❣❛♥✐s❡❞ ✐♥ ✜✈❡ s❡❝t✐♦♥s✳ ❋♦❧❧♦✇✐♥❣ t❤❡ ✐♥tr♦❞✉❝t✐♦♥✱ ❙❡❝t✐♦♥ ✷ ♣r❡s❡♥ts ❛ ♠❛t❤❡♠❛t✐❝❛❧ ❞❡s❝r✐♣t✐♦♥ ♦❢ ❛♥ ❛r❜✐tr❛r② ✐♥❢♦r♠❛t✐♦♥ s②st❡♠ ✇✐t❤ ✐ts str✉❝t✉r❛❧ ♣r♦♣❡rt✐❡s ❛t t❤❡ ❝♦♠♣♦♥❡♥t ❛♥❞ s②st❡♠ ❧❡✈❡❧s✳ ❙❡❝t✐♦♥ ✸ ❡①t❡♥❞s t❤❡ ♠❡t❤♦❞ ❢♦r t❛r❣❡t✐♥❣ ✐♥❢♦r♠❛t✐♦♥ ♣♦❧✐❝②✳ ❙❡❝t✐♦♥ ✹ ✐❧❧✉str❛t❡s t❤❡ ❛♣♣❧✐❝❛t✐♦♥ ♦❢ t❤❡ ♠❡t❤♦❞ ✇✐t❤✐♥ ❛ ✇♦r❦s❤♦♣ s❡t✲✉♣ ❛♥❞ s❤♦✇s ❤♦✇ t♦ ❞❡r✐✈❡ t❡st❛❜❧❡ ❤②♣♦t❤❡s❡s ❜❛s❡❞ ♦♥ ❡①♣❡rt ❦♥♦✇❧❡❞❣❡ ❣❛t❤❡r❡❞ ❜② ❛ q✉❡st✐♦♥♥❛✐r❡✳ ❋✐♥❛❧❧②✱ ❙❡❝t✐♦♥ ✺ ❝♦♥❝❧✉❞❡s t❤❡ ❝❤❛♣t❡r✳

(4)

✷ ❆ str✉❝t✉r❡ ❢♦r ❛♥ ✐♥❢♦r♠❛t✐♦♥ s②st❡♠

❆♥ ✐♥❢♦r♠❛t✐♦♥ s②st❡♠SK ✐s ❞❡✜♥❡❞ ❛s ❛ ❝♦❧❧❡❝t✐♦♥ ♦❢K❝♦♠♣♦♥❡♥ts ♦❢n♦r❣❛♥✐s❛t✐♦♥s t❤❛t ❥♦✐♥t❧②

❛♥❞✴♦r ✐♥❞✐✈✐❞✉❛❧❧② ❣❡♥❡r❛t❡✱ ❞✐ss❡♠✐♥❛t❡✱ ♦r ✉s❡ ✐♥❢♦r♠❛t✐♦♥ t♦ ❛❝❝♦♠♣❧✐s❤ ❛ ❝♦♠♠♦♥ ❣♦❛❧ G✳

SK=

n

{Ci, Gi, G}K

i=1| ∩Ci= 0,∩Gi=G, n=P

K i=1ni

o

. ✭✶✮

❚❤✐s ❞❡✜♥✐t✐♦♥ ♣♦st✉❧❛t❡s t❤r❡❡ ❝♦♥❞✐t✐♦♥s✳ ❋✐rst✱ni♦r❣❛♥✐s❛t✐♦♥s ✇✐t❤✐♥ ❝♦♠♣♦♥❡♥ti✱ ❞❡♥♦t❡❞ ❜②

Ci,❛r❡ ❛ss✉♠❡❞ t♦ ❤❛✈❡ ❛ ❝♦♠♠♦♥ ❣♦❛❧Gi ✐♥ t❤❡ ❣❡♥❡r❛t✐♦♥ ♦r ❞✐ss❡♠✐♥❛t✐♦♥ ♦r ✉s❡ ♦❢ t❤❡ ✐♥❢♦r✲

♠❛t✐♦♥ ❝♦♥❝❡r♥❡❞✳✸ ❙❡❝♦♥❞❧②✱ ❝♦♠♣♦♥❡♥ts ❛r❡ ♠✉t✉❛❧❧② ❡①❝❧✉s✐✈❡✱ ♠❡❛♥✐♥❣ t❤❛t ❛♥ ♦r❣❛♥✐③❛t✐♦♥

❝❛♥♥♦t ❜❡ ❛ ♠❡♠❜❡r ♦❢ ♠♦r❡ t❤❛♥ ♦♥❡ ❝♦♠♣♦♥❡♥t ❞✉r✐♥❣ t❤❡ s❛♠❡ t✐♠❡ ♣❡r✐♦❞✳ ❚❤✐s ✐s ✐♠♣❧✐❡❞ ❜②

∩Ci= 0.❚❤✐r❞❧②✱ ✐♥❞✐✈✐❞✉❛❧ ❝♦♠♣♦♥❡♥ts s✉♣♣♦rt t❤❡ s②st❡♠ ❣♦❛❧✱ ✇❤✐❝❤ ✐s ✐♠♣❧✐❡❞ ❜②∩Gi=G

SK ✐s ❛ss✉♠❡❞ t♦ ♦♣❡r❛t❡ ❛t t✇♦ ❧❡✈❡❧s✳ ❆t t❤❡ ❝♦♠♣♦♥❡♥t ❧❡✈❡❧✱ ❡❛❝❤ ❝♦♠♣♦♥❡♥t ❛✐♠s t♦

r❡❛❧✐③❡ ✐ts ❣♦❛❧ ❜② ❝♦♥s✐❞❡r✐♥❣ ✐ts ✐s♦❧❛t❡❞✱ ♦♥❡✲t♦✲♦♥❡ ✭❜✐♥❛r②✮ ✐♥t❡r❛❝t✐♦♥s ✇✐t❤ ♦t❤❡r ❝♦♠♣♦♥❡♥ts ✐♥ t❤❡ s②st❡♠✳ ❍❡♥❝❡✱ ❡❛❝❤ ❝♦♠♣♦♥❡♥t ❣✐✈❡s ♣r✐♦r✐t② t♦ t❤❡ ✐♠♣r♦✈❡♠❡♥t ♦❢ ✐ts ♦✇♥ ❡♥✈✐r♦♥♠❡♥t

ei(.)✱ ✇❤✐❧❡ ❛❜str❛❝t✐♥❣ ✐ts❡❧❢ ❢r♦♠ t❤❡ ♥❡❡❞s ♦❢ t❤❡ ❡♥t✐r❡ s②st❡♠✳ ❆t t❤❡ s②st❡♠ ❧❡✈❡❧✱ ❤♦✇❡✈❡r✱ ❛

❜❡♥❡✈♦❧❡♥t ❜♦❞② ❣♦✈❡r♥s t❤❡ ❡♥t✐r❡ ♥❡t✇♦r❦ ♦❢ ❜✐♥❛r② ✐♥t❡r❛❝t✐♦♥s ❛❝r♦ss K ❝♦♠♣♦♥❡♥ts t♦ r❡❛❧✐③❡

t❤❡ s②st❡♠ ❣♦❛❧❀ ❤❡♥❝❡✱ ✐t ❣✐✈❡s ♣r✐♦r✐t② t❤❡ ✐♠♣r♦✈❡♠❡♥t ♦❢ t❤❡ s②st❡♠ ❡♥✈✐r♦♥♠❡♥t e(.)✐♥ ✇❤✐❝❤

✐♥❞✐✈✐❞✉❛❧ ❝♦♠♣♦♥❡♥ts ♦♣❡r❛t❡✳ ❚❤❡ ❞✐st✐♥❝t✐♦♥ ❜❡t✇❡❡♥ t❤❡ ❝♦♠♣♦♥❡♥t ❛♥❞ s②st❡♠ ❡♥✈✐r♦♥♠❡♥ts ❛r✐s❡s ❢r♦♠ t❤❡ ❢❛❝t t❤❛t ❛ ❝♦♠♣♦♥❡♥t ❞♦❡s ♥♦t ✐♥✈❡st ✐♥ ❛r❡❛s t❤❛t ❛r❡ ❧✐❦❡❧② t♦ ❧❡❛❞ t♦ s✉❜st❛♥t✐❛❧ ♣♦s✐t✐✈❡ ❡①t❡r♥❛❧✐t✐❡s ❢♦r ♦t❤❡rs ❜❡❝❛✉s❡ SK ❞♦❡s ♥♦t ❛ss✉♠❡ ❛♥② ♣r♦♣❡rt② r✐❣❤ts s②st❡♠✳ ❖♥ t❤❡

❝♦♥tr❛r②✱ t❤❡ ❜❡♥❡✈❡❧♦♥t ❜♦❞② ✐s ❡①♣❡❝t❡❞ t♦ ✐♥✈❡st ✐♥ ❛r❡❛s ✇❤❡r❡ ♣♦s✐t✐✈❡ ❡①t❡r♥❛❧✐t✐❡s ❛r❡ ❧✐❦❡❧② t♦ ❛r✐s❡✳

❚❤❡ ❝❛s❡ ♦❢ ■❈❚ ✐s ♦♥❡ s✉❝❤ ❡①❛♠♣❧❡ t♦ s❤♦✇ t❤❡ ❞✐st✐♥❝t✐♦♥ ❜❡t✇❡❡♥ t❤❡ t✇♦ ❡♥✈✐r♦♥♠❡♥ts✳ ❈♦♥s✐❞❡r✱ ❢♦r ❡①❛♠♣❧❡✱ t❤❡ ✐♥✈❡st♠❡♥t ✐♥ ■❈❚ ✐♥❢r❛str✉❝t✉r❡✿ ❤✉♠❛♥✱ ❝❛♣✐t❛❧ ❛♥❞ ✐♥st✐t✉t✐♦♥❛❧✳ ❆ ❝♦♠♣♦♥❡♥t ✇✐❧❧ ♥❛t✉r❛❧❧② ❜❡ ✐♥t❡r❡st❡❞ ✐♥ t❤❡ ✐♥✈❡st♠❡♥t ❛✐♠❡❞ t♦ ❡♥❤❛♥❝❡ st❛✛ ❝❛♣❛❝✐t②✱ ❛❝q✉✐r❡ ♥❡✇ ✐♥❢♦r♠❛t✐♦♥ t❡❝❤♥♦❧♦❣✐❡s ❛♥❞ ❞❡s✐❣♥ r✉❧❡s ❢♦r ❜✐♥❛r② ✐♥❢♦r♠❛t✐♦♥ ❡①❝❤❛♥❣❡ ✇✐t❤✐♥ t❤❡ ❝♦♠♣♦✲ ♥❡♥t ❛s ✇❡❧❧ ❛s ✇✐t❤ ♦t❤❡r ❝♦♠♣♦♥❡♥ts ✇✐t❤ ✇❤✐❝❤ ✐t ❤❛s r❡❧❛t✐♦♥s✳ ❍♦✇❡✈❡r✱ t❤❡ ❜❡♥❡✈❡❧♦♥t ❜♦❞② ✇✐❧❧ ❜❡ ✐♥t❡r❡st❡❞ ✐♥ ❝r❡❛t✐♥❣ ❛♥ ❡♥❛❜❧✐♥❣ ❡♥✈✐r♦♥♠❡♥t ❛✐♠❡❞ t♦ ❢❛❝✐❧✐t❛t❡ ✐♥❞✐✈✐❞✉❛❧ ❝♦♠♣♦♥❡♥ts t♦ ♦♣❡r❛t❡ ♠♦r❡ ❡✛❡❝t✐✈❡❧②✳ ❖r❣❛♥✐③✐♥❣ ✐♥❢♦r♠❛t✐♦♥ ❡①❝❤❛♥❣❡ ❝♦♠♠✉♥✐t✐❡s✱ ✐♥✈❡st✐♥❣ ✐♥ t❤❡ ❡❝♦♥♦♠②✲ ✇✐❞❡ ■❈❚ ✐♥❢r❛str✉❝t✉r❡ ❛♥❞ ❡st❛❜❧✐s❤✐♥❣ ♣♦❧✐❝② ❛♥❞ ✐♥st✐t✉t✐♦♥ ♠❛❦✐♥❣ ♣✉❜❧✐❝ ❜♦❞✐❡s ❛r❡ s♦♠❡ ♦❢

(5)

t❤❡ ❡❧❡♠❡♥ts ♦❢ s✉❝❤ ❡♥✈✐r♦♥♠❡♥t✳

❚♦ t❤✐s ❡♥❞✱ ✇❡ ❝♦♥❥❡❝t✉r❡ t❤❛t t❤❡r❡ ❛r❡ t✇♦ ✐♠♣❧✐❝✐t ✐♥❢♦r♠❛t✐♦♥ ♠❛♥❛❣❡♠❡♥t ❢✉♥❝t✐♦♥s✿ ♦♥❡ ♦♣❡r❛t✐♥❣ ❛t t❤❡ ❝♦♠♣♦♥❡♥t ❧❡✈❡❧ mi(.)❛♥❞ ❛♥♦t❤❡r ❛t t❤❡ s②st❡♠ ❧❡✈❡❧ m(.)✳ ❚❤❡ t❡r♠ ✐♥❢♦r✲

♠❛t✐♦♥ ♠❛♥❛❣❡♠❡♥t r❡❢❡rs t♦ t❤❡ ♠❛♥❛❣❡♠❡♥t ♦❢ t❤r❡❡ ✐♥❢♦r♠❛t✐♦♥ ❛❝t✐✈✐t✐❡s✿ ✐♥❢♦r♠❛t✐♦♥ ♣r♦✲ ❞✉❝t✐♦♥✱ ❞✐ss❡♠✐♥❛t✐♦♥ ❛♥❞ ✉s❡✳✹ ❋♦❧❧♦✇✐♥❣ ❙t❡✈❡♥ ❲♦❧❢❡✱ ❉❛✈✐❞ ❩✐❧❜❡r♠❛♥✱ ❙t❡✈❡♥ ❲✉ ❛♥❞ ❉❛✈✐❞

❏✉st ❬✻❪✱ ✐♥❢♦r♠❛t✐♦♥ r❡❢❡rs t♦ ❛ ❤✐❣❤❧② ❝♦♥t❡①t✲s❡♥s✐t✐✈❡ r❡s♦✉r❝❡✱ t❤❡ ♠❡❛♥✐♥❣ ❛♥❞ ✈❛❧✉❡ ♦❢ ✇❤✐❝❤ ❞❡♣❡♥❞ ♦♥ t❤❡ ❝♦♠♣❡t❡♥❝✐❡s ♦❢ t❤❡ ♦r❣❛♥✐s❛t✐♦♥s ✐♥t❡r❛❝t✐♥❣✳

✷✳✶ ❈♦♠♣♦♥❡♥t✲❧❡✈❡❧ ✐♥❢♦r♠❛t✐♦♥ ♠❛♥❛❣❡♠❡♥t

●✐✈❡♥ (αi t, G

i, I

t1)✱ ❛ r❡♣r❡s❡♥t❛t✐✈❡ ♦r❣❛♥✐③❛t✐♦♥ ✐♥ ❝♦♠♣♦♥❡♥t i ❝❤❛r❛❝t❡r✐③❡❞ ❜② {ei(.), mi(.)}

❝❤♦♦s❡s(Li t, Dit)✿

Iti =α i tm

i

(ei(Lit, D i t)|G

i

, It−1) ✭✷✮

where It−1≡(I

1

t1, It21, ..., I

K t1).

mi(.) ❞❡♥♦t❡s ❝♦♠♣♦♥❡♥t i✬s ✐♥❢♦r♠❛t✐♦♥ ♠❛♥❛❣❡♠❡♥t ❢✉♥❝t✐♦♥✳ ❊q✉❛t✐♦♥ ✷ s♣❡❝✐✜❡s t❤❛t✱ ❣✐✈❡♥

❝♦♠♣♦♥❡♥t i✬s ❣♦❛❧ Gi ❛♥❞ t❤❡ s②st❡♠ ✐♥❢♦r♠❛t✐♦♥ st♦❝❦ I

t1 ❛t t✐♠❡ t✱ ❝♦♠♣♦♥❡♥t i ♦r❣❛♥✐③❡s

✐ts ✐♥❢♦r♠❛t✐♦♥ ❛❝t✐✈✐t✐❡s ❜② ✐♥✈❡st✐♥❣ ✐♥ t❤❡ ❞❡✈❡❧♦♣♠❡♥t ♦❢ ✐ts ❧❡❛r♥✐♥❣Li

t ❛♥❞ ❞✐ss❡♠✐♥❛t✐♦♥ Dti

❝❛♣❛❝✐t✐❡s✳ ❚❤❡ ♣❛r❛♠❡t❡rαi

t=αi(Lt, Dt)r❡♣r❡s❡♥ts ❝♦♠♣♦♥❡♥ti✬s ❝❛♣❛❝✐t② t♦ ✐♥t❡r♥❛❧✐③❡ ❝❤❛♥❣❡s

t❛❦✐♥❣ ♣❧❛❝❡ ❛t t❤❡ s②st❡♠ ❧❡✈❡❧ (Lt, Dt)✳ ❖♥❧② t❤❡ r❛t✐♦s ♦❢ t❤❡ αit✬s ♠❛tt❡r✱ s♦ ✇✐t❤♦✉t ❧♦ss ♦❢

❣❡♥❡r❛❧✐t② ✇❡ ❝❛♥ ♥♦r♠❛❧✐③❡ α1

t = 1✳

❯s✐♥❣ ❡q✉❛t✐♦♥ ✷✱ ✇❡ ♠❛♣ t❤❡ ❝♦♠♣♦♥❡♥t✲❜❛s❡❞ ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ❛s✿

SC

K≡SK((L1t, Dt1), ..., SK(LKt , DtK)) =

            I1

t−1I

1

t It1−1I

2

t . . It1−1I

K t

I2

t−1I

1

t It2−1I

2

t . . It2−1I

K t

. . . . . . . . . . IK

t1It1 ItK1It2 . . ItK1ItK

            . ✭✸✮

■t s❤♦✉❧❞ ❜❡ ♥♦t❡❞ t❤❛t ❡❛❝❤ ❝♦❧✉♠♥ ♦❢ t❤✐s sq✉❛r❡ ♠❛tr✐① ✐s ❛ss♦❝✐❛t❡❞ ✇✐t❤ ♦♥❡ ❝♦♠♣♦♥❡♥t✳ ❋♦r ❡①✲ ❛♠♣❧❡✱ t❤❡1st❝♦❧✉♠♥ ❝♦rr❡s♣♦♥❞s t♦ ❝♦♠♣♦♥❡♥t1❀ ❛♥❞ t❤❡2nd❝♦❧✉♠♥✱ ❝♦♠♣♦♥❡♥t ✷✳ ❚❤❡ ❞✐❛❣♦♥❛❧

❝❡❧❧sIi t−1I

i

t❢♦r ❛❧❧i❛♥❞ts❤♦✇ ✐♥❢♦r♠❛t✐♦♥ ❧♦♦♣s✳ ❚❤❡ ♦✛✲❞✐❛❣♦♥❛❧ ❝❡❧❧s

n

Ii t−1I

j

t, i=j= 1, ..., K and i6=j

o

(6)

✐♥❞✐❝❛t❡ ❜✐♥❛r② ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ❜❡t✇❡❡♥ t✇♦ ❝♦♠♣♦♥❡♥ts✳ ❋♦r ❡①❛♠♣❧❡✱I2

t−1I

1

t ✐♥❞✐❝❛t❡s t❤❛t ✐♥✲

❢♦r♠❛t✐♦♥ ❛✈❛✐❧❛❜❧❡ ✐♥ C2 ❛t t1 ✢♦✇s ✐♥t♦ C1❛t t✐♠❡ t✳ ■t ❝❛♥ ❛❧s♦ ❜❡ ✐♥t❡r♣r❡t❡❞ t❤❛t C2✬s

✐♥❢♦r♠❛t✐♦♥ st♦❝❦ ❛t t✐♠❡ t−1 ❝❛♥ ❜❡ ✉s❡❞ t♦ ❡①❡rt ✐♥✢✉❡♥❝❡ ♦♥ t❤❡ ✐♥❢♦r♠❛t✐♦♥ ♣r♦❞✉❝t✐♦♥

❛❝t✐✈✐t② ♦❢C1 ❛t t✐♠❡t✳ ■♥❢♦r♠❛t✐♦♥ ✢♦✇ ♠✐❣❤t ❜❡ t❤r♦✉❣❤ ❢♦r♠❛❧ ♠❡❝❤❛♥✐s♠s✱ s✉❝❤ ❛s ✐♥❢♦r♠❛✲

t✐♦♥ s❤❛r✐♥❣ ❝♦♠♠✐tt❡❡s✱ ❥♦✐♥t ♣✉❜❧✐❝❛t✐♦♥s✱ ❛♥❞ ❥♦✐♥t st❛ tr❛✐♥✐♥❣✱ ♦r t❤r♦✉❣❤ ✐♥❢♦r♠❛❧ ✐♥t❡r❛❝t✐♦♥s ♦❢ ♦r❣❛♥✐s❛t✐♦♥s✳ ■♥ t❤✐s ♠♦❞❡❧✱ ✇❡ ❛ss✉♠❡ t❤❛t t❤❡ ✢♦✇ ✐s ♣✉r♣♦s❡❢✉❧❧② ♦r❣❛♥✐s❡❞ ❜② t❤❡ t✇♦ ❝♦♠♣♦♥❡♥ts ✐♥t❡r❛❝t✐♥❣ ❜② ✉s✐♥❣ ❢♦r♠❛❧ ♠❡❝❤❛♥✐s♠s✳

❚♦ ❢✉❧❧② ♠❡❛s✉r❡ t❤❡ ♥❡t ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ✐♥ SC

K✱ ❛ t♦t❛❧ ♦❢ (2K

2 K) ♣❛r❛♠❡t❡rs s❤♦✉❧❞

❜❡ ❞❡t❡r♠✐♥❡❞✳ ❚❛❦❡✱ ❢♦r ❡①❛♠♣❧❡✱ t❤❡ ♥❡t ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ✈✐❛ t❤❡ ♦✛✲❞✐❛❣♦♥❛❧ ❝❡❧❧ (I2

t−1I

1

t)✳

❚❤✐s r❡q✉✐r❡s t❤❡ ❞❡t❡r♠✐♥❛t✐♦♥ ♦❢ t✇♦ ♣❛r❛♠❡t❡rs✿ C2✬s ❞✐ss❡♠✐♥❛t✐♦♥ ❛♥❞ ❧✐♥❦❛❣❡ ❞❡✈❡❧♦♣♠❡♥t

❝❛♣❛❝✐t②D2

t−1❛s ✇❡❧❧ ❛sC

1✬s ❧❡❛r♥✐♥❣ ❝❛♣❛❝✐t②L1

t✱ ✇❤✐❝❤ t❤❡♥ r❡s✉❧ts ✐♥[2K(K−1)]♣❛r❛♠❡t❡rs t♦

❜❡ ❦♥♦✇♥✳ ❋✉rt❤❡r✱K♣❛r❛♠❡t❡rs ♥❡❡❞ t♦ ❜❡ ❞❡t❡r♠✐♥❡❞ ❢♦rαi

t.❆s ❛ r❡s✉❧t✱ ✇✐t❤ t❤❡ ❞❡t❡r♠✐♥❛t✐♦♥

♦❢[2K(K−1) +K] = (2K2K)♣❛r❛♠❡t❡rs✱S

K ✇✐❧❧ ❜❡ ❢✉❧❧② ✐❞❡♥t✐✜❡❞✳

✷✳✷ ❙②st❡♠✲❧❡✈❡❧ ✐♥❢♦r♠❛t✐♦♥ ♠❛♥❛❣❡♠❡♥t

❆ ❜❡♥❡✈♦❧❡♥t ❜♦❞② ❝❤❛r❛❝t❡r✐③❡❞ ❜②{e(.), m(.)}✐s ❛ss✉♠❡❞ t♦ ♣✉r♣♦s❡❢✉❧❧② ♦r❣❛♥✐s❡ ❛❧❧ t❤❡ ❝♦♠✲

♣♦♥❡♥ts ❛r♦✉♥❞ t❤❡ s②st❡♠ ❣♦❛❧✳ ●✐✈❡♥ (βt, G, It1)✱ t❤✐s ❜♦❞② ❛♣♣❧✐❡s ❛ ❣♦✈❡r♥❛♥❝❡ r✉❧❡ m(.) t♦

♠❛♥❛❣❡ t❤❡ s②st❡♠✲❧❡✈❡❧ ✐♥❢♦r♠❛t✐♦♥ ✢♦✇✿

It=βtm(e(Lt, Dt)|G, It1). ✭✹✮

◆♦t❡ t❤❛t ❡q✉❛t✐♦♥ ✹ ✐s ❡①♣r❡ss❡❞ ✐♥ ✈❡❝t♦r ♥♦t❛t✐♦♥✳ ■♥ ✐ts ✉♥❞❡rt❛❦✐♥❣s✱ t❤❡ ❜❡♥❡✈♦❧❡♥t ❜♦❞② ❛✐♠s t♦ ❝r❡❛t❡ ❛♥ ❡♥❛❜❧✐♥❣ ❡♥✈✐r♦♥♠❡♥t ❢♦r ✐♠♣r♦✈❡❞ ❧❡❛r♥✐♥❣ ❛♥❞ ✐♥❢♦r♠❛t✐♦♥ ❞✐ss❡♠✐♥❛t✐♦♥ t♦ t❛❦❡ ♣❧❛❝❡✳ βt✐s ❡①♦❣❡♥♦✉s t♦ t❤❡ ❜❡♥❡✈♦❧❡♥t ❜♦❞②✬s ❛❝t✐♦♥s✱ r❡✢❡❝t✐♥❣ ✐ts ❛❞❥✉st♠❡♥t ❝❛♣❛❝✐t② ❛❣❛✐♥st

s❤♦❝❦s✳ ❖♥❧② t❤❡ r❛t✐♦s ♦❢ t❤❡βt✬s ♠❛tt❡r✱ s♦ ✇✐t❤♦✉t ❧♦ss ♦❢ ❣❡♥❡r❛❧✐t② ✇❡ ❝❛♥ ♥♦r♠❛❧✐③❡βt1= 1✳

❯s✐♥❣ ❡q✉❛t✐♦♥ ✹✱ ✇❡ ♠❛♣ t❤❡ s②st❡♠✲❜❛s❡❞ ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ❛s✿

SS

K ≡SK(Lt, Dt) =

            I1

t1It1 It11It2 . . It11ItK

I2

t−1I

1

t It2−1I

2

t . . It2−1I

K t

. . . . . . . . . . IK

t−1I

1

t ItK−1I

2

t . . ItK−1I

(7)

SS

K ❝❛♣t✉r❡s ♦♥❡ ♥❡✇ ♣r♦♣❡rt② t❤❛t ❝♦♠♣♦♥❡♥ts ❝❛♥♥♦t s✉♣♣♦rt ✐♥❞✐✈✐❞✉❛❧❧②✳ ❚❤✐s ✐s t❤❡ ♣r♦♣❡rt②

t❤❛t t❤❡ s②st❡♠ ✐s ❣r❡❛t❡r t❤❛♥ t❤❡ s✉♠ ♦❢ ✐ts ❝♦♠♣♦♥❡♥ts✳ ❚❤❛t ✐s✱ t❤❡ ❡❝♦♥♦♠②✲✇✐❞❡ ✐♥❢♦r♠❛t✐♦♥ st♦❝❦ ✉♥❞❡rSS

K ✐s ❣r❡❛t❡r t❤❛♥ t❤❡ s✉♠ ♦❢ t❤❡ ❝♦♠♣♦♥❡♥t✲❧❡✈❡❧ ✐♥❢♦r♠❛t✐♦♥ st♦❝❦s ✉♥❞❡rSKC✳ ❚❤✐s

✐s ❛ttr✐❜✉t❡❞ t♦ t❤❡ ❢❛❝t t❤❛t ✐♥ SC

K✱ ❜✐♥❛r② ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ✐s ❞❡t❡r♠✐♥❡❞ ❜② ❝♦♠♠♦♥ ✐♥t❡r❡sts

♦❢ t❤❡ t✇♦ ❝♦♠♣♦♥❡♥ts ❝♦♥❝❡r♥❡❞✱ ✇❤✐❧❡ t❤❡ ✢♦✇ ✐♥ SS

K ✐s ❞❡t❡r♠✐♥❡❞ ❜② t❤❡ ❜❡♥❡✈♦❧❡♥t ❜♦❞②✬s

❡✛♦rt t♦ t✉♥❡ ❛❧❧ t❤❡ ❜✐♥❛r② ❧✐♥❦❛❣❡s ✐♥ t❤❡ s②st❡♠ ✐♥t♦ t❤❡ s②st❡♠ ❣♦❛❧G✳ ❚❤❡ s②st❡♠ ✐♥❢♦r♠❛t✐♦♥

♠❛♥❛❣❡♠❡♥t ❢✉♥❝t✐♦♥m(e(Lt, Dt)|G, It−1)❞♦❡s ♥♦t ❛✛❡❝t t❤❡ ✐♥t❡r♥❛❧ ❛✛❛✐rs ♦❢ ❝♦♠♣♦♥❡♥ts✱ ❜✉t ♣r♦♠♦t❡s t❤❡ ❣r♦✇t❤ ♦❢ ♥❡❝❡ss❛r② ❜✐♥❛r② ❧✐♥❦❛❣❡s ✐♥ t❤❡ ❡♥t✐r❡ s②st❡♠✳

✸ ❚❛r❣❡t✐♥❣ ✐♥❢♦r♠❛t✐♦♥ ♣♦❧✐❝②

❚♦ ❞❡s✐❣♥ ❡✛❡❝t✐✈❡ ✐♥❢♦r♠❛t✐♦♥ ♣♦❧✐❝② ✐♥t❡r✈❡♥t✐♦♥s ❢♦r t❤❡ ✐♠♣r♦✈❡♠❡♥t ♦❢ s②st❡♠ ♣❡r❢♦r♠❛♥❝❡ ✲ ✐♥ t❡r♠s ♦❢ ❣❡♥❡r❛t✐♦♥✱ ✢✉❞✐t② ❛♥❞ ✉s❡ ♦❢ ✐♥❢♦r♠❛t✐♦♥✱ ♦♥❡ ♥❡❡❞s t♦ ❤❛✈❡ ❛ ❝❧❡❛r ✉♥❞❡rst❛♥❞✐♥❣ ♦❢ t❤❡ ♥❛t✉r❡ ♦❢ ♦❜s❡r✈❡❞ ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ✐♥ t❤❡ s②st❡♠✳ ■♥ r❡❛❧✐t②✱ t❤❡ ♦❜s❡r✈❡❞ ✢♦✇SK ❝♦♠♣r✐s❡s t✇♦

t②♣❡s ♦❢ ❡♥t❛♥❣❧❡❞ ❜✐♥❛r② r❡❧❛t✐♦♥s{SC

K, SKS}✳ ❊q✉❛t✐♦♥ ✸ ♠❛♣s ❚②♣❡ ■ r❡❧❛t✐♦♥s t❤❛t ✐♥❞✐✈✐❞✉❛❧

❝♦♠♣♦♥❡♥ts ❡st❛❜❧✐s❤ ❜② ✉s✐♥❣ t❤❡✐r ♦✇♥ r❡s♦✉r❝❡s✱ ✇❤✐❧❡ ❡q✉❛t✐♦♥ ✺ ♠❛♣s ❚②♣❡ ■■ r❡❧❛t✐♦♥s t❤❛t ❛r❡ ❡✐t❤❡r ❢✉❧❧② ♦r ♣❛rt✐❛❧❧② ❡st❛❜❧✐s❤❡❞ t❤r♦✉❣❤ t❤❡ ❡♠♣❧♦②♠❡♥t ♦❢ s②st❡♠ r❡s♦✉r❝❡s✳ ❚❤❡ t❛s❦ ✐s t♦ ❞✐s❡♥t❛♥❣❧❡ t❤❡s❡ r❡❧❛t✐♦♥s✱ ✐❞❡♥t✐❢② t❤❡ ✇❡❛❦ s♣♦ts ❛t t❤❡ ❝♦♠♣♦♥❡♥t ❛s ✇❡❧❧ ❛s s②st❡♠ ❧❡✈❡❧s✱ ❛♥❞ ❞❡s✐❣♥ ♣♦❧✐❝② ✐♥t❡r✈❡♥t✐♦♥s✳

❚②♣❡ ■ ❛♥❞ ❚②♣❡ ■■ r❡❧❛t✐♦♥s ❝❛♥ ❜❡ ❞✐s❡♥t❛❣❧❡❞ ❜② ❛♥❛❧②③✐♥❣ t❤❡ ❦❡② ❢❛❝t♦rs t❤❛t s❤❛♣❡ t❤❡ ❝♦♠♣♦♥❡♥t ❛♥❞ s②st❡♠ ❡♥✈✐r♦♥♠❡♥ts✳ ❚❛❜❧❡s ✶✲✷ ♣r♦✈✐❞❡ ❛ ❧✐st ♦❢ s✉❝❤ ❢❛❝t♦rs✳ ■♥❢♦r♠❛t✐♦♥ ♦♥ t❤❡ ❡①t❡♥t t♦ ✇❤✐❝❤ t❤❡s❡ ❢❛❝t♦rs ❤❛✈❡ ❜❡❡♥ r❡❛❧✐③❡❞ ❝❛♥ ❜❡ ✉s❡❞ t♦ ❞❡r✐✈❡ ❛ ✇❡✐❣❤t ❢♦r ❞✐s❡♥t❛♥❣❧✐♥❣

SC

K ❢r♦♠SK ✭♦rSKS ❢r♦♠SK)✳ ❚❤❡ str❡♥❣t❤ ♦❢ ✐♥❞✐✈✐❞✉❛❧ ❢❛❝t♦rs ✐s ❛ss❡ss❡❞ ❜② ✉s✐♥❣ ❛ s❝❛❧❡ ❢r♦♠

✶ t❤r♦✉❣❤ ✺✿ ✶❂✇❡❛❦✱ ✷❂❜❡❧♦✇✲❛✈❡r❛❣❡✱ ✸❂❛✈❡r❛❣❡✱ ✹❂❛❜♦✈❡✲❛✈❡r❛❣❡ ❛♥❞ ✺❂str♦♥❣✳ ❚❤❡ ❧❡✈❡❧ ✶ ✭❧❡✈❡❧ ✺✮ r❡♣r❡s❡♥ts t❤❡ ♠✐♥✐♠✉♠ ✭♠❛①✐♠✉♠✮ str❡♥❣t❤✱ ❛♥❞ ♦✈❡r ✽ ❢❛❝t♦rs ❧✐st❡❞✱ t❤❡ ♠✐♥✐♠✉ ✭♠❛①✐♠✉♠✮ t♦t❛❧ s❝♦r❡ ✇♦✉❧❞ ❜❡ ✽ ✭✹✵✮✳ ❍❛✈✐♥❣ ❞❡✜♥❡❞ t❤❡ ♠✐♥✐♠✉♠ ✭♠❛①✐♠✉♠✮ t♦t❛❧ s❝♦r❡s✱ ✇❡ ❝❛❧❝✉❧❛t❡ t❤❡ ❢♦❧❧♦✇✐♥❣ ✇❡✐❣❤ts ❢♦r ❡✈❡r② ♦r❣❛♥✐③❛t✐♦♥j✐♥ t❤❡ s②st❡♠ ❛♥❞ t❤❡♥ t❛❦❡ t❤❡ ❝♦♠♣♦♥❡♥t

❧❡✈❡❧ ❛✈❡r❛❣❡✿

¯

li= ni

X

j=1

actual total score f or Ljmin total score f or Lj

max total score f or Ljmin total score f or Lj

/ni

(8)

¯

di= ni

X

j=1

actual total score f or Djmin total score f or Dj

max total score f or Djmin total score f or Dj

/ni.

❚❤❡ s❛♠❡ ❝❛❧❝✉❧❛t✐♦♥s ❛r❡ ❛❧s♦ ♣❡r❢♦r♠❡❞ t♦ ❞❡t❡r♠✐♥❡l(i)❛❜❞d(i)❢♦r t❤❡ s②st❡♠ ✈❛r✐❛❜❧❡sD❛♥❞ L✱ r❡s♣❡❝t✐✈❡❧②✳ ◆♦r♠❛❧✐③✐♥❣ d¯i, d(i)

❛♥❞ l¯j, l(j)

②✐❡❧❞s✿

(di, lj)≡

¯

di

¯

di+d(i)

, ¯ l¯j lj+l(j)

∀i,j=1,2,...,K.

❯s❡ ❛ ❣❡♦♠❡tr✐❝ ♠❡❛♥ ♦❢di ❛♥❞li✱ ✇❡ ❝♦♥str✉❝t ❛ ♠❛tr✐① ♦❢ ✐♥❞✐❝❡sWK t♦ ♠❡❛s✉r❡ t❤❡ ✢✉✐❞✐t② ♦❢

✐♥❢♦r♠❛t✐♦♥ ❜❡t✇❡❡♥ t✇♦ ❝♦♠♣♦♥❡♥ts✿

wij= (d0i.5l

0.5

j )∀ij =⇒WK =

           

w11 w12 . . w1K

w21 w22 . . w2K

. . . . . . . . . . wK1 wK2 . . wKK

            .

❆♣♣❧②✐♥❣ t❤❡ ❍❛❞❛♠❛r❞ ♣r♦❞✉❝t ✭❛❧s♦ ❦♥♦✇♥ ❛s t❤❡ ❡♥tr②✲✇✐s❡ ♣r♦❞✉❝t✮ ②✐❡❧❞s✿

SKC=WK◦SK =

           

w11 w12 . . w1K

w21 w22 . . w2K

. . . . . . . . . . wK1 wK2 . . wKK

            ◦             I1

t1It1 It11It2 . . It11ItK

It21It1 It21It2 . . It21ItK

. . . . . . . . . . IK

t−1I

1

t ItK−1I

2

t . . ItK−1I

K t             =            

w11(It11It1) w12(It11It2) . . w1K(It11ItK)

w21(I2

t−1I

1

t) w22(It2−1I

2

t) . . w2K(It2−1I

K t )

. . . . .

. . . . .

wK1(ItK−1I

1

t) wK2(ItK−1I

2

t) . . wKK(ItK−1I

K t )             .

❚❤❡ ❞✐s❡♥t❛♥❣❧✐♥❣ ♦❢ SC

K ♣r♦✈✐❞❡s t❤r❡❡ ❛❞✈❛♥t❛❣❡s ✐♥ t❤❡ ❞❡s✐❣♥ ♦❢ ♣♦❧✐❝② ✐♥t❡r✈❡♥t✐♦♥s✳ ❋✐rst✱

t❤❡ r❡❧❛t✐♦♥s ✇✐t❤ ♣♦♦r ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ❝❛♥ ❜❡ ♣r♦❥❡❝t❡❞✱ ❛♥❞ t❤✐s ✇♦✉❧❞ ❛❧❧♦✇ ♣♦❧✐❝② ♠❛❦❡rs

(9)

t♦ t❛❦❡ ♠❡❛s✉r❡s t♦ r❡❧❡❛s❡ t❤❡ ❝♦♥str❛✐♥ts ♦♥ t❤❡s❡ r❡❧❛t✐♦♥s ❜❡❢♦r❡ ❞❡❝✐s✐♦♥s ❛r❡ ✐♠♣❧❡♠❡♥t❡❞✳ ❙❡❝♦♥❞✱ t❤❡ ❡✛❡❝t✐✈❡ ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ❝❛♥ ❜❡ ♣r♦❥❡❝t❡❞ ✇✐t❤ t❤❡ ✐❞❡♥t✐✜❝❛t✐♦♥ ♦❢ ❞♦♠✐♥❛♥t ❛♥❞ s✉❜✲♦r❞✐♥❛t❡ ❝♦♠♣♦♥❡♥ts ✐♥ t❤❡ s②st❡♠✳ ❙♣❡❝✐✜❝ ♣♦❧✐❝✐❡s✴♣r♦❣r❛♠s ❛♥❞ ✐♥st✐t✉t✐♦♥s ❝❛♥ t❛r❣❡t t❤❡ ❞♦♠✐♥❛♥t s♦✉r❝❡s ✭✐✳❡✳✱ ❝♦♠♣♦♥❡♥ts✮ ❛♥❞ s✉❜♦r❞✐♥❛t❡ ✉s❡rs ♦❢ ❝r✐t✐❝❛❧ ✐♥❢♦r♠❛t✐♦♥✳ ❚❤✐r❞✱ t❤❡ ❡st✐♠❛t❡❞ ♠❛tr✐① t♦❣❡t❤❡r ✇✐t❤ t❤❡ ✉♥❞❡r❧②✐♥❣ ✐♥st✐t✉t✐♦♥❛❧ str✉❝t✉r❡ ❝❛♥ ♣r♦✈✐❞❡ ✉s ✇✐t❤ ✐♥❢♦r♠❛t✐♦♥ ♦♥ t❤❡ t②♣❡ ♦❢ t❤❡ s②st❡♠✿ ✢❡①✐❜❧❡ ✈❡rs✉s r✐❣✐❞✳ ❆ s②st❡♠ ✐s s❛✐❞ t♦ ❜❡ ✢❡①✐❜❧❡ ✭r✐❣✐❞✮ ✐❢ t❤❡ ♦r❣❛♥✐③❛t✐♦♥❛❧ ❝❛♣❛❝✐t✐❡s ❛r❡ ❤✐❣❤❧② ❞❡✈❡❧♦♣❡❞ ✭✉♥❞❡✈❡❧♦♣❡❞✮ ❛♥❞ ✐♥st✐t✉t✐♦♥s s✉❝❤ ❛s ♣r♦♣❡rt② r✐❣❤ts ❛♥❞ ❡♥❢♦r❝❡♠❡♥t r✉❧❡s ❛r❡ ✐♥ ♣❧❛❝❡ ✭❛t ❡♠❜r②♦♥✐❝ st❛❣❡✮✳

✹ ❆♥ ❡①♣❡r✐♠❡♥t

✹✳✶ ❈❤❛r❛❝t❡r✐③✐♥❣

S

K

❆♥ ❡①♣❡r✐♠❡♥t❛❧ ✇♦r❦s❤♦♣ ✐s ✉s❡❞ t♦ s❤♦✇ ❤♦✇ t♦ ❡st❛❜❧✐s❤SK ❛♥❞ ✐❞❡♥t✐❢② t❤❡ ❝r✐t✐❝❛❧ ✐♥❢♦r♠❛t✐♦♥

❣❛♣s ❛♥❞ ♣❛t❤✇❛②s ✐t ❝♦♥t❛✐♥s✳ ❚❤❡ ✐♠♣❧✐❡❞ str✉❝t✉r❡ ♦❢SK ✐s ❢✉rt❤❡r ❛♥❛❧②s❡❞ t♦ ❞❡✈❡❧♦♣ t❡st❛❜❧❡

❤②♣♦t❤❡s❡s✳ ❙✉♣♣♦s❡ t❤❛t t❤❡ ✇♦r❦s❤♦♣ ❣❛t❤❡rs r❡♣r❡s❡♥t❛t✐✈❡s ♦❢n= 15♦r❣❛♥✐s❛t✐♦♥s✱ ✇❤✐❝❤ ❛r❡

❞✐✈✐❞❡❞ ✐♥t♦K= 5❝♦♠♣♦♥❡♥ts ✭♦r s✉❜s❡ts✮✱ ✇✐t❤ni= 3♦r❣❛♥✐s❛t✐♦♥s ❡❛❝❤✳ ❋✐❢t❡❡♥ r❡♣r❡s❡♥t❛t✐✈❡s

❛r❡ ♦r❣❛♥✐s❡❞ ✐♥ t❤r❡❡ ✇♦r❦✐♥❣ ❣r♦✉♣s(W G)✱ ❡❛❝❤ ♦❢ ✇❤✐❝❤ ✐♥❝❧✉❞❡s ♦♥❡ r❡♣r❡s❡♥t❛t✐✈❡ ❢r♦♠ ❡❛❝❤

❝♦♠♣♦♥❡♥t✳ ❚❤❡s❡ ❣r♦✉♣s s❡♣❛r❛t❡❧② ❞✐s❝✉ss❡ ❛r❡❛s t❤❛t ✇❛rr❛♥t ❜❡tt❡r ✉♥❞❡rst❛♥❞✐♥❣ ❛♥❞ ✇❤❡r❡ ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ✐s ❝♦♥str❛✐♥❡❞ ✐♥ r❡❧❛t✐♦♥ t♦ ❛ s②st❡♠ ❣♦❛❧✳ ❖♥❡ s✉❝❤ ❣♦❛❧ ✐s t♦ ❡♥❤❛♥❝❡ ❛❣r✐❝✉❧t✉r❛❧ ♣r♦❞✉❝t✐✈✐t② t❤r♦✉❣❤ ❛♥ ❡✛❡❝t✐✈❡ ✢♦✇ ♦❢ ❜✐♦t❡❝❤♥♦❧♦❣✐❝❛❧ ✐♥❢♦r♠❛t✐♦♥✳ ❊✈❡r②W G♣r❡♣❛r❡s ❛ ♠❛♣

♦❢ ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ✭♦r ♦❢ ❝❛✉s❛❧ r❡❧❛t✐♦♥s✮✿ SW G1

5 , S5W G2 ❛♥❞ S5W G3✱ ✇❤✐❝❤ ❛r❡ ❝♦♥s♦❧✐❞❛t❡❞ ❛s S5=SW G1

5 +S5W G2+S5W G3✳

❆ ♠✉❧t✐✲✈♦t✐♥❣ s❝❤❡♠❡ ✐s ❛❞♦♣t❡❞ t♦ r❛♥❦ t❤❡ ♣r❡❢❡r❡♥❝❡s ♦❢ 15 r❡♣r❡s❡♥t❛t✐✈❡s ♦✈❡r ❜✐♥❛r②

✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ♦r ❝❛✉s❛❧ r❡❧❛t✐♦♥s ♣❧❛❝❡❞ ✐♥ t❤❡ ♦✛✲❞✐❛❣♦♥❛❧ ❝❡❧❧s ♦❢ S5✳ ❊❛❝❤ r❡♣r❡s❡♥t❛t✐✈❡ ✐s

❣✐✈❡♥ t❤r❡❡ ✈♦t❡s✿ ❛ str♦♥❣ ✈♦t❡ ✇♦rt❤ t❤r❡❡ ♣♦✐♥ts✱ ❛ ♠❡❞✐♦❝r❡ ✈♦t❡ ✇♦rt❤ t✇♦ ♣♦✐♥ts✱ ❛♥❞ ❛ ✇❡❛❦ ✈♦t❡ ✇♦rt❤ ♦♥❡ ♣♦✐♥t✳ ❙✉♣♣♦s❡ t❤❛t t❤❡ ✈♦t✐♥❣ ②✐❡❧❞s t❤r❡❡ ❤②♣♦t❤❡t✐❝❛❧ s②st❡♠s✿ S5,strong

❢♦r str♦♥❣ ✈♦t❡s✱S5,mediocre ❢♦r ♠❡❞✐♦❝r❡ ✈♦t❡s✱ ❛♥❞S5,weak ❢♦r ✇❡❛❦ ✈♦t❡s✳

S5,strong✐♥❞✐❝❛t❡s t❤❡ ❝❛✉s❛❧ r❡❧❛t✐♦♥s t❤❛t r❡❝❡✐✈❡❞ str♦♥❣ ✈♦t❡s ♦♥❧②✱ ♣✉tt✐♥❣ ✜rst t❤✐♥❣s ✜rst✳

❋♦r ✐♥st❛♥❝❡✱ t❤❡ ❝❛✉s❛❧ r❡❧❛t✐♦♥I1

t1It4♣❧❛❝❡❞ ✐♥ t❤❡1str♦✇ ✲4th❝♦❧✉♠♥ ♦❢S5,strongr❡❝❡✐✈❡❞ ❢♦✉r

str♦♥❣ ✈♦t❡s t❤❛t ❛♠♦✉♥t t♦ ✶✷ ♣♦✐♥ts✳ P❧❛❝❡❞ ✐♥ t❤❡ 3rd r♦✇ ✲ 2nd ❝♦❧✉♠♥✱ t❤❡ r❡❧❛t✐♦♥ I3

t1It2

r❡❝❡✐✈❡❞ ✜✈❡ str♦♥❣ ✈♦t❡s t❤❛t ❛♠♦✉♥t t♦ ✶✺ ♣♦✐♥ts✳ ❲✐t❤ ✶✺ ♣♦✐♥ts✱I3

t1It2 st❛♥❞s ♦✉t ❛s t❤❡ t♦♣

(10)

♣r✐♦r✐t② ❝❛✉s❛❧ r❡❧❛t✐♦♥ t♦ ❜❡ ✐♥✈❡st✐❣❛t❡❞✱ ❢♦❧❧♦✇❡❞ ❜②I1

t−1I

4

t ❛♥❞It5−1I

4

t ✇✐t❤ ✶✷ ♣♦✐♥ts ❡❛❝❤✳

S5,strong=

            I1

t1It1 3 3 12 3

9 I2

t1It2 . . .

. 15 I3

t−1I

3

t . .

3 6 . I4

t−1I

4

t .

3 . . 12 I5

t−1I

5 t             .

S5,mediocre ✐♥❞✐❝❛t❡s t❤❡ ❝❛✉s❛❧ r❡❧❛t✐♦♥s t❤❛t r❡❝❡✐✈❡❞ ♦♥❧② ♠❡❞✐♦❝r❡ ✈♦t❡s✳ ❲✐t❤ s✐① ♣♦✐♥ts ✐♥ t❤❡

1st r♦✇ ✲ 5th ❝♦❧✉♠♥ ♦❢ S5

,mediocre✱ t❤❡ ❜✐♥❛r② r❡❧❛t✐♦♥ It11It5 ✐s t❤❡ str♦♥❣❡st✱ ❢♦❧❧♦✇❡❞ ❜② t❤❡

r❡❧❛t✐♦♥sI1

t1It2✱ It21It1✱It31It2✱ ❛♥❞It41It1 ✇✐t❤ ❢♦✉r ♣♦✐♥ts ❡❛❝❤✳

S5,mediocre=

            I1

t1It1 4 2 2 6

4 I2

t1It2 . . .

. 4 I3

t1It3 2 .

4 . . I4

t1It4 2

3 . . 2 I5

t1It5

            .

S5,weak ✐♥❞✐❝❛t❡s t❤❡ ❝❛✉s❛❧ r❡❧❛t✐♦♥s t❤❛t r❡❝❡✐✈❡❞ ✇❡❛❦ ✈♦t❡s ♦♥❧②✳ ❲✐t❤ ❢♦✉r ♣♦✐♥ts✱ t❤❡ r❡❧❛t✐♦♥

I2

t−1I

1

t ✐s t❤❡ str♦♥❣❡st✱ ❢♦❧❧♦✇❡❞ ❜②It1−1I

5

t ❛♥❞It4−1I

3

t ✇✐t❤ t❤r❡❡ ♣♦✐♥ts ❡❛❝❤✳

S5,weak=

            I1

t−1I

1

t 2 1 . 3

4 I2

t−1I

2

t . . .

. . I3

t−1I

3

t . .

. . 3 I4

t−1I

4

t 1

2 . . 1 I5

t1It5

            .

❋✐♥❛❧❧②✱S5,total✐♥❞✐❝❛t❡s t❤❡ ❛❣❣r❡❣❛t❡ ✈♦t❡s ❝❛❧❝✉❧❛t❡❞ ❛s ✭S5,strong+S5,mediocre+S5,weak✮✳ ❲✐t❤

✶✾ ♣♦✐♥ts✱ t❤❡ r❡❧❛t✐♦♥ I3

t−1I

2

t st❛♥❞s ♦✉t ❛s t❤❡ t♦♣ ♣r✐♦r✐t② r❡❧❛t✐♦♥✱ ❢♦❧❧♦✇❡❞ ❜② It2−1I

1

t ✇✐t❤ ✶✼

(11)

♣♦✐♥ts✱I5

t−1I

4

t ✇✐t❤ ✶✺ ♣♦✐♥ts✱It1−1I

4

t ✇✐t❤ ✶✹ ♣♦✐♥ts✱ ❛♥❞It1−1I

5

t ✇✐t❤ ✶✷ ♣♦✐♥ts✳✺

S5,total=

            I1

t1It1 9 6 14 12

17 I2

t1It2 . . .

. 19 I3

t−1I

3

t 2 .

7 6 3 I4

t−1I

4

t 3

5 . . 15 I5

t−1I

5 t             .

❚❤❡cause−ef f ectstr✉❝t✉r❡✿ ❈❛✉s❡ ✭c✮ ♦❢ ❛ ❝♦♠♣♦♥❡♥t ✐s ❞❡✜♥❡❞ ❛s t❤❡ s✉♠ ♦❢ t❤❡ ♣♦✐♥ts ✐♥ t❤❡

❝♦rr❡s♣♦♥❞✐♥❣ r♦✇❀ ❛♥❞ ❊✛❡❝t ✭e✮✱ ❛s t❤❡ s✉♠ ♦❢ t❤❡ ♣♦✐♥ts ✐♥ t❤❡ ❝♦rr❡s♣♦♥❞✐♥❣ ❝♦❧✉♠♥ ✭❚❛❜❧❡ ✸✮✳

▲✐st✐♥❣ t❤❡(c, e)❝♦♦r❞✐♥❛t❡s ✐♥ ❚❛❜❧❡ ✸✱ ❋✐❣✉r❡s ✶✲✹ s❤♦✇ t❤❡ ✉♥❞❡r❧②✐♥❣ str✉❝t✉r❡s ♦❢S5,strong✱

S5,mediocre✱ S5,weak✱ ❛♥❞S5,total✱ r❡s♣❡❝t✐✈❡❧②✳✻ ❚❤❡s❡ ✜❣✉r❡s ❤❛✈❡ t❤r❡❡ ❝r✐t✐❝❛❧ r❡❣✐♦♥s✳ ❘❡❣✐♦♥

✶ ✐s t❤❡ ❧♦❝✉s ♦❢ t❤❡ ✹✺✲❞❡❣r❡❡ ❧✐♥❡✱ ✇❤❡r❡ c = e✳ ❆ ❝♦♠♣♦♥❡♥t ♦♥ t❤✐s ❧✐♥❡ ✐s s❛✐❞ t♦ ❜❡ ❤✐❣❤❧②

✐♥t❡r❛❝t✐✈❡ ✇✐t❤ t❤❡ r❡st ♦❢ t❤❡ s②st❡♠ ✐❢ ✐ts ❝♦♦r❞✐♥❛t❡ ❢❛❧❧s ✐♥ t❤❡ ♥♦rt❤✲❡❛st ❝♦r♥❡r ♦❢ t❤❡ ✜❣✉r❡❀ ❛♥❞ ♠✐♥✐♠❛❧❧② ✐♥t❡r❛❝t✐✈❡ ✐❢ ✐ts ❝♦♦r❞✐♥❛t❡ ✐s ❝❧♦s❡ ❜② t❤❡ (0,0) ❝♦♦r❞✐♥❛t❡✳ ❘❡❣✐♦♥ ✷ ✐s t❤❡ ❛r❡❛

❜❡❧♦✇ t❤❡ ✹✺✲❞❡❣r❡❡ ❧✐♥❡✱ ✇❤❡r❡ c > e✳ ❆ ❝♦♠♣♦♥❡♥t ✇✐t❤ ❛ ✈❡r② ❤✐❣❤c ❛♥❞ ❛ ✈❡r② ❧♦✇e✱ ❞❡♥♦t❡❞

❜②c >> e✱ s✉❣❣❡sts t❤❛t ✐t str♦♥❣❧② ❞♦♠✐♥❛t❡s t❤❡ ♦t❤❡rs ✐♥ t❤❡ s②st❡♠✳ ❘❡❣✐♦♥ ✸ ✐s t❤❡ ❛r❡❛ ❛❜♦✈❡

t❤❡ ✹✺✲❞❡❣r❡❡ ❧✐♥❡✱ ✇❤❡r❡ c < e✳ ❆ ❝♦♠♣♦♥❡♥t ✇✐t❤ ❛ ✈❡r② ❧♦✇c ❛♥❞ ❛ ✈❡r② ❤✐❣❤ e✱ ❞❡♥♦t❡❞ ❜② c << e✱ s✉❣❣❡sts t❤❛t ✐t ✐s str♦♥❣❧② s✉❜♦r❞✐♥❛t❡✳

❚❤❡(c−e)str✉❝t✉r❡ ♦❢S5,totals❤♦✇♥ ✐♥ ❋✐❣✉r❡ ✶ r❡✈❡❛❧s t❤❛t✿

✶✳ I1

t ✐s t❤❡ ♠♦st ❞♦♠✐♥❛♥t ❝♦♠♣♦♥❡♥t ✐♥ t❤❡ s②st❡♠✱ ✇✐t❤c = 41♣♦✐♥ts✱ ❢♦❧❧♦✇❡❞ ❜② I3t ✇✐t❤

21♣♦✐♥ts✳

✷✳ I5

t ✐s r❡❧❛t✐✈❡❧② s♣❡❛❦✐♥❣ t❤❡ ♠♦st ✐♥t❡r❛❝t✐✈❡ ❝♦♠♣♦♥❡♥t✳

✸✳ I2

t ❛♥❞I4t ❛r❡ ❜♦t❤ s✉❜♦r❞✐♥❛t❡ ❝♦♠♣♦♥❡♥ts✳

❚❤❡ ♦❜s❡r✈❛t✐♦♥ ✭1✮ ❛♥❞ t❤❡ t❤r❡❡ ❦❡② r❡❧❛t✐♦♥s I1

t1It4✱ It11It5 ❛♥❞ It31It2 ✐♥ S5,total ❛❧❧ t♦❣❡t❤❡r

s✉❣❣❡st t❤❛t r❡s❡❛r❝❤ ♥❡❡❞s t♦ ❜❡ ❞♦♥❡ t♦ ✉♥❝♦✈❡r t❤❡ ♠❡❝❤❛♥✐s♠s t❤r♦✉❣❤ ✇❤✐❝❤I1

t✐♥✢✉❡♥❝❡s ❜♦t❤

I4

t ❛♥❞ I5t✱ ❛♥❞ I3t ✐♥✢✉❡♥❝❡s It2✳ ❋✉rt❤❡r♠♦r❡✱ t❤❡ ♦❜s❡r✈❛t✐♦♥ ✭2✮ ❛♥❞ t❤❡ ❦❡② r❡❧❛t✐♦♥It51It4 ✐♥

S5,total t♦❣❡t❤❡r s✉❣❣❡st t❤❛t r❡s❡❛r❝❤ ♥❡❡❞s t♦ ❜❡ ❞♦♥❡ t♦ ✉♥❝♦✈❡r t❤❡ ♠❡❝❤❛♥✐s♠s t❤r♦✉❣❤ ✇❤✐❝❤

I5

t ✐♥✢✉❡♥❝❡s I4t✳ ❋✐♥❛❧❧②✱ t❤❡ ♦❜s❡r✈❛t✐♦♥ (3) r❡✈❡❛❧s t❤❛t I1t ✐s ❛❧s♦ ✐♥✢✉❡♥❝❡❞ str♦♥❣❧② ❜② t❤❡

r❡st ♦❢ t❤❡ s②st❡♠ ♣♦✐♥ts t♦ t❤❡ ♥❡❡❞ ❢♦r ❢✉rt❤❡r r❡s❡❛r❝❤ ❛s t♦ ❤♦✇ I2

t ✐♥✢✉❡♥❝❡sI1t✳ ❚❤❡s❡ t❤r❡❡

(12)

s✉❣❣❡st✐♦♥s ✐♠♣❧② t❤❡ ❢♦❧❧♦✇✐♥❣ r❡❞✉❝❡❞ ❢♦r♠ t❤❛t r❡✈❡❛❧s t❤❡ ✐❞❡♥t✐✜❡❞ ❝r✐t✐❝❛❧ r❡❧❛t✐♦♥s ♦♥❧②✳

S5,total=

           

It11It1 . . 14 12

17 I2

t−1I

2

t . . .

. 19 I3

t−1I

3

t . .

. . . I4

t−1I

4

t .

. . . 15 I5

t−1I

5 t             ..

❚❤❡ r❡❞✉❝❡❞ ❢♦r♠ ✉♥❞❡r❧✐♥❡s t❤❡ ❦❡② ❢❡❛t✉r❡ ♦❢ t❤❡ s②st❡♠ ❛t ❤❛♥❞✳ I3

t ✐s t❤❡ ♦♥❧② tr✉❧② ❡①♦❣❡♥♦✉s

❝♦♠♣♦♥❡♥t✱ ✇❤✐❧❡ I4t ✐s t❤❡ ♦♥❧② tr✉❧② ❡♥❞♦❣❡♥♦✉s ❝♦♠♣♦♥❡♥t✳ ❖♥❡ ✐♠♣❧✐❝❛t✐♦♥ ♦❢ t❤✐s ❢❡❛t✉r❡ ✐s

t❤❛t ♣❛t❤✇❛②s ♦❢ ✐♥t❡r❡st ✐♥ t❤❡ r❡❞✉❝❡❞S5,total✇♦✉❧❞ ❛❧✇❛②s st❛rt ✇✐t❤I3t ❛♥❞ ❡♥❞ ❛tI4t✱ r❡s✉❧t✐♥❣

✐♥ t❤❡ ❢♦❧❧♦✇✐♥❣3−edged❛♥❞4−edged♣❛t❤✇❛②s✱ r❡s♣❡❝t✐✈❡❧②✿

I3t−1I

2

t, I

2

t−1I

1

t, I

1

t−1I

4

t

I3t1I2t, I2t1I1t, I1t1I5t, I5t1I4t.

❚❤❡(c−e)✲str✉❝t✉r❡ ♦❢S5,strong s❤♦✇♥ ✐♥ ❋✐❣✉r❡ ✷ ✐s ✐♥t❡r♣r❡t❡❞ s✐♠✐❧❛r❧②✳ ■t s❤♦✇s ❛♥ ❛❧♠♦st

✐❞❡♥t✐❝❛❧ str✉❝t✉r❡ t♦ t❤❛t ✐♥ ❋✐❣✉r❡ ✶✱ ❡①❝❡♣t t❤❛t t❤❡ ❝♦♠♣♦♥❡♥ts ❛r❡ ♠♦r❡ ♣♦❧❛r✐s❡❞✳ ❋✉r✲ t❤❡r♠♦r❡✱ t❤❡ r❡❞✉❝❡❞ ❢♦r♠ ♦❢ S5,strong ❤❛s t✇♦ ❡①♦❣❡♥♦✉s ❝♦♠♣♦♥❡♥ts✱ I3t ❛♥❞ I5t✱ ✇❤✐❧❡ I4t st✐❧❧

r❡♠❛✐♥s t♦ ❜❡ t❤❡ ♦♥❧② ❡♥❞♦❣❡♥♦✉s ❝♦♠♣♦♥❡♥t✳ ❚❤❡r❡❢♦r❡✱ t❤❡ ♣❛t❤✇❛②s ♦❢ ✐♥t❡r❡st ✇♦✉❧❞ ✐♥❝❧✉❞❡

I3

t−1I

2

t, I2t−1I

1

t, I1t−1I

4

t ❛♥❞ I5t−1I

4

t✳ ✭❚❤❡ ✐♥t❡r♣r❡t❛t✐♦♥ ♦❢ S5,mediocre ❛♥❞ S5,weak ✐s ❧❡❢t t♦ t❤❡

r❡❛❞❡r✳✮

S5,strong=

            I1

t−1I

1

t . . 12 .

9 I2

t−1I

2

t . . .

. 15 I3

t−1I

3

t . .

. . . I4

t−1I

4

t .

. . . 12 I5

t−1I

5 t             .

❆❧❧ ✐♥ ❛❧❧✱ t❤❡ ❛♥❛❧②s✐s s✉❣❣❡sts t❤❛t ♣❛t❤✇❛②s ✐♥❝❧✉❞✐♥❣ I3t1I2t, I2t1I1t, I1t1I4t ✭❋✐❣✉r❡ ✺✮ ❛♥❞

I3

t−1I

2

t, I2t−1I

1

t, I1t−1I

5

t, I5t−1I

4

t ✭❋✐❣✉r❡ ✻✮ ✇❛rr❛♥t ❜❡tt❡r ✉♥❞❡rst❛♥❞✐♥❣✳

❚❤❡ ❝♦♥♥❡❝t❡❞♥❡ss ♦❢SK✱ ❞❡♥♦t❡❞ ❜②Z✱ ✐s ❝❛❧❝✉❧❛t❡❞ ❛s K(KR

−1) ✇✐t❤1≥Z ≥0✱ ✇❤❡r❡R✐s t❤❡ t♦t❛❧ ♥✉♠❜❡r ♦❢ ✐❞❡♥t✐✜❡❞ ❝❛✉s❛❧ r❡❧❛t✐♦♥s❀K✱ t❤❡ ♥✉♠❜❡r ♦❢ ❞✐♠❡♥s✐♦♥s ♦❢SK❀ ❛♥❞[K(K−1)]✱

t❤❡ t♦t❛❧ ♥✉♠❜❡r ♦❢ ❝❛✉s❛❧ ✭❜✐♥❛r②✮ r❡❧❛t✐♦♥s ✐♥SK✳ ❚❤✉s✱Ztotal =1320✱ ✇❤❡r❡R= 13❛♥❞K= 5✳

(13)

❖t❤❡r ♠❡❛s✉r❡s ♦❢ ❝♦♥♥❡❝t❡❞♥❡ss ✐♥❝❧✉❞❡✿Zstrong= 1020✱Zmediocre=1020 ❛♥❞Zweak =208✳ ❆ s②st❡♠

✐s s❛✐❞ t♦ ❜❡ ❢✉❧❧② ✐❞❡♥t✐✜❡❞ ✐❢Z = 1✱ ✇❤✐❝❤ ✐♠♣❧✐❡s t❤❛t ❛❧❧ ♦❢ t❤❡ ❝♦♠♣♦♥❡♥ts ✐♥ t❤❡ s②st❡♠ ❛r❡

❝♦♥♥❡❝t❡❞ t♦ ❡❛❝❤ ♦t❤❡r✳

❆ ❝❧✉st❡r ✐s ❛ s✉❜s❡t ♦❢ ❝♦♠♣♦♥❡♥ts ❝♦♥❝❡♥tr❛t❡❞ ❛r♦✉♥❞ ❛ ❝❡rt❛✐♥(c, e)✲❝♦♦r❞✐♥❛t❡✳ ❚❤❡ ❛♥❛❧②s✐s

s❤♦✇s t❤❛t t❤❡r❡ ❛r❡ t✇♦ ❝❧✉st❡rs✿ (I2

t, I4t)❛♥❞(It3, I5t)✳ ❚❤❡ ❝♦♠♣♦♥❡♥tI1t r❡♣r❡s❡♥ts ❛♥ ✐s❧❛♥❞ ❛s

✐t st❛♥❞s ❛❧♦♥❡ s❡♣❛r❛t❡❞ ❢r♦♠ t❤❡ r❡st ♦❢ t❤❡ s②st❡♠✳

✹✳✷ ❉✐s❡♥t❛♥❣❧✐♥❣

S

C

K

❛♥❞

S

S

K

❢r♦♠

S

K

❋♦r ✐❧❧✉str❛t✐✈❡ ♣✉r♣♦s❡s✱ ✇❡ s❡t ❛r❜✐tr❛r② ✈❛❧✉❡s ❢♦r (d1, l1) = (0.7,0.5)✱ (d2, l2) = (0.5,0.5)✱ (d3, l3) = (0.4,0.6)✱(d4, l4) = (0.8,0.5)✱(d5, l5) = (0.3,0.8)✳ ❯s✐♥❣S5,total✱ ✇❡ ❝❛❧❝✉❧❛t❡ t❤❡ ❢♦❧❧♦✇✲

✐♥❣ ❞✐s❡♥t❛❣❧❡❞ ✐♥❢♦r♠❛t✐♦♥ s②st❡♠✿

S5C,total=W5◦S5,total

=            

0.59 0.59 0.65 0.59 0.75 0.50 0.50 0.55 0.50 0.63 0.45 0.45 0.49 0.45 0.57 0.63 0.63 0.69 0.63 0.80 0.39 0.39 0.42 0.39 0.49

            ◦            

0 9 6 14 12

17 0 0 0 0

0 19 0 2 0

7 6 3 0 3

5 0 0 15 0             SC

5,total=

            I1

t1It1 5 4 8 9

9 It21It2 0 0 0

0 9 I3

t−1I

3

t 1 0

4 4 2 I4

t−1I

4

t 2

2 0 0 6 I5

t−1I

5 t             .

❚❛❜❧❡ ✹ ❧✐sts t❤❡ ✐♠♣❧✐❡❞(c, e)✲❝♦♦r❞✐♥❛t❡s ♦❢ SC

5,total ❛♥❞ S5S,total✳ ❚❤❡s❡ ❝♦♦r❞✐♥❛t❡s ✐♠♣❧② t❤❛t

t❤❡ ✐♥✢✉❡♥❝❡ ♦♥ t❤❡ ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ♦❢ ❝❤❛♥❣❡s ✐♥ t❤❡ s②st❡♠ ❛♥❞ ❝♦♠♣♦♥❡♥t ❡♥✈✐r♦♥♠❡♥ts ✐s ❝♦♠♣❛r❛❜❧❡✳ ❚❤❡ ❞❡s✐❣♥ ♦❢ ♣♦❧✐❝② ✐♥t❡r✈❡♥t✐♦♥ ✐s ❝♦♥❞✐t✐♦♥❛❧ ♦♥ t❤❡ s♣❡❝✐✜❝ s②st❡♠ ❛♥❞ ❝♦♠♣♦♥❡♥t ❣♦❛❧s✳

(14)

✹✳✸ ❍②♣♦t❤❡s✐s ❞❡✈❡❧♦♣♠❡♥t

❚❤❡ ✜♥❞✐♥❣s ❝❛♥ ❜❡ ❛♥❛❧②s❡❞ ✇✐t❤ t❤r❡❡ ❝♦♥❝❡♣ts✿ ✐♥❢♦r♠❛t✐♦♥ ❣❛♣s✱ ❝❛✉s❡✲❡✛❡❝t ✐♥❢♦r♠❛t✐♦♥ ♣❛t❤✇❛②s✱ ❛♥❞ ♣♦t❡♥t✐❛❧ t❡st❛❜❧❡ ❤②♣♦t❤❡s❡s✳ ❚❤❡ ♠✉❧t✐✲✈♦t✐♥❣ s❝❤❡♠❡ ❝❛rr✐❡❞ ♦✉t r❡s✉❧t❡❞ ✐♥ t❤❡ ✐❞❡♥t✐✜❝❛t✐♦♥ ♦❢ ✜✈❡ ❝r✐t✐❝❛❧ ❣❛♣s t❤❛t ✇❛rr❛♥t ❜❡tt❡r ✉♥❞❡rst❛♥❞✐♥❣ ✭s❡❡ t❤❡ r❡❞✉❝❡❞ ❢♦r♠s ♦❢

S5,total ❛♥❞S5,strong✮✳ ❚❤❡s❡ ❣❛♣s ❛r❡✿ t❤❡ ❡✛❡❝ts ♦❢I3t ♦♥I2t❀ t❤❡ ❡✛❡❝ts ♦❢I2t ♦♥I1t❀ t❤❡ ❡✛❡❝ts ♦❢

I1

t ♦♥I4t❀ t❤❡ ❡✛❡❝ts ♦❢I1t ♦♥I5t❀ ❛♥❞ t❤❡ ❡✛❡❝ts ♦❢I5t ♦♥ I4t✳ ❊❛❝❤ ♦♥❡ ♦❢ t❤❡s❡ ❣❛♣s r❡♣r❡s❡♥ts ❛

❤②♣♦t❤❡s✐s t❤❛t ❞❡s❡r✈❡s t♦ ❜❡ t❡st❡❞ ❡♠♣✐r✐❝❛❧❧②✳

❚❤❡ ❣❛♣s ❢✉rt❤❡r ✐♠♣❧② t❤❛t t❤❡ s②st❡♠ ✉♥❞❡r ✐♥✈❡st✐❣❛t✐♦♥ ❤❛s ❛ t♦t❛❧ ♦❢ t✇♦ ❝❛✉s❡✲❡✛❡❝t ✐♥❢♦r♠❛t✐♦♥ ♣❛t❤✇❛②s✱ I3

t1I2t, I2t1I1t, I1t1I4t ❛♥❞ I3t1I2t, I2t1I1t, I1t1I5tI5t1I4t✱ t♦ ❜❡ ❡①❛♠✐♥❡❞

✭❋✐❣✉r❡s ✺ ❛♥❞ ✻✮✳ ❚❤❡ ✜rst ♣❛t❤✇❛② s❤♦✉❧❞ r❡❛❞ ❛s ❢♦❧❧♦✇s✳ ❚❤❡ ♦r❣❛♥✐s❛t✐♦♥s ✐♥ C3 ♠❛❦❡

t❤❡✐r t✐♠❡ t−1✐♥❢♦r♠❛t✐♦♥ st♦❝❦ ❛✈❛✐❧❛❜❧❡ t♦ t❤♦s❡ ♦r❣❛♥✐③❛t✐♦♥s ✐♥ ❝♦♠♣♦♥❡♥t ✷✱ ✇❤✐❧❡ t❤♦s❡ ✐♥

❝♦♠♣♦♥❡♥t ✷ ♠❛❦❡ t❤❡✐r t−1 ✐♥❢♦r♠❛t✐♦♥ st♦❝❦ t♦ t❤♦s❡ ✐♥ ❝♦♠♣♦♥❡♥t ✶ ❛♥❞ s♦ ♦♥✳ ■♥t❡r♣r❡t❡❞

❧✐❦❡✇✐s❡✱ t❤❡ s❡❝♦♥❞ ♣❛t❤✇❛② ❛❞❞✐t✐♦♥❛❧❧② ✐♥❞✐❝❛t❡s t❤❡ ♥❡❡❞ ❢♦r ✐♥❢♦r♠❛t✐♦♥ ♦♥ t❤❡ ❡✛❡❝ts ♦❢ I1

t−1 ♦♥I5

t❛♥❞ t❤♦s❡ ♦❢I5t−1♦♥I

4

t✳ ❚❤❡ s❡q✉❡♥❝❡ ♦❢ ✐♥t❡r❛❝t✐♦♥s ✐♥ t❤❡s❡ ♣❛t❤✇❛②s ✐s ❝r✉❝✐❛❧ ❛♥❞ r❡♠❛✐♥s

t♦ ❜❡ t❡st❡❞ ❡♠♣✐r✐❝❛❧❧②✳

❚❤❡ ❞✐r❡❝t❡❞ ❝❛✉s❛❧ r❡❧❛t✐♦♥s ✐♥ ❋✐❣✉r❡s ✶✲✷ s❤♦✇ t❤❛tC1✐s t❤❡ ❞♦♠✐♥❛♥t s♦✉r❝❡ ♦❢ ✐♥❢♦r♠❛✲

t✐♦♥✱ ✇❤✐❝❤ ✐s ❢♦❧❧♦✇❡❞ ❜②C3❛♥❞C5✱ ❛♥❞ t❤❛tC2❛♥❞C4❛r❡ t❤❡ s✉❜♦r❞✐♥❛t❡ ✉s❡rs ♦❢ ✐♥❢♦r♠❛t✐♦♥✳

❊❛❝❤ ♦♥❡ ♦❢ t❤❡s❡ ♦❜s❡r✈❛t✐♦♥s r❡♣r❡s❡♥ts ❛♥ ❛r❡❛ t♦ ❜❡ ✐♥✈❡st✐❣❛t❡❞ ❡♠♣✐r✐❝❛❧❧②✳ ❘❡❣❛r❞✐♥❣ C1

❜❡✐♥❣ t❤❡ ❞♦♠✐♥❛♥t s♦✉r❝❡✱ ♦♥❡ ❝❛♥ ❢♦r♠✉❧❛t❡ ❛ ❤②♣♦t❤❡s✐s t❤❛t ♦r❣❛♥✐s❛t✐♦♥s ✐♥ t❤✐s ❝♦♠♣♦♥❡♥t s✐❣♥✐✜❝❛♥t❧② ✐♥✢✉❡♥❝❡ t❤❡ ✐♥❢♦r♠❛t✐♦♥ ♠❛♥❛❣❡♠❡♥t ✐♥ C4 ♦r C2✳ ▲✐❦❡✇✐s❡✱ t❤❡ ✐♥✢✉❡♥❝❡ ♦♥ t❤❡

✐♥❢♦r♠❛t✐♦♥ ♠❛♥❛❣❡♠❡♥t ✐♥C4❛♥❞C2 ♦❢ t❤❡ s❡❝♦♥❞ ❞❡❣r❡❡ s♦✉r❝❡s ✭C3♦rC5✮ ❝❛♥ ❛❧s♦ ❜❡ t❡st❡❞✳

❚❤❡ ❛♥❛❧②s✐s ✐♥❞✐❝❛t❡s t❤❛t s♦♠❡ ❝♦♠♣♦♥❡♥ts ❤❛✈❡ ❞✐st✐♥❝t t❡st❛❜❧❡ ❝❤❛r❛❝t❡r✐st✐❝s✳ ❚❤❡ ✜rst ❝❤❛r❛❝t❡r✐st✐❝ ✐s t❤❛tI3

t ✐s ❡①♦❣❡♥♦✉s✳ ❚❤✐s ✐♠♠❡❞✐❛t❡❧② ❢♦❧❧♦✇s ❢r♦♠ t❤❡ r❡❞✉❝❡❞ ❢♦r♠s ♦❢S5,total

❛♥❞S5,strong✱ ✇❤❡r❡ t❤❡ ❝♦❧✉♠♥ ❛ss♦❝✐❛t❡❞ ✇✐t❤I3t ✐s ❡♠♣t②✳ ❚❤❡ s❡❝♦♥❞ ✐s t❤❛tI4t ✐s ❡♥❞♦❣❡♥♦✉s✳

❚❤✐s ❢♦❧❧♦✇s ❢r♦♠ t❤❡ r❡❞✉❝❡❞ ❢♦r♠s ♦❢ S5,total ❛♥❞ S5,strong✱ ✇❤❡r❡ t❤❡ r♦✇ ❛ss♦❝✐❛t❡❞ ✇✐t❤I4t ✐s

❡♠♣t②✳

❚❤❡ ♠✉❧t✐✲✈♦t✐♥❣ s❝❤❡♠❡ ✇❛s ❛♣♣❧✐❡❞ t♦ ❝❧❛ss✐❢② ❜✐♥❛r② r❡❧❛t✐♦♥s ✐♥t♦ t❤r❡❡ ❣r♦✉♣s✿ ❤✐❣❤✱ ♠❡❞✐♦❝r❡✱ ❛♥❞ ✇❡❛❦✳ ❚❤❡ ✐♠♣❧✐❡❞ ✐♥❢♦r♠❛t✐♦♥ str✉❝t✉r❡s ❛r❡ t❤❡♥ ♠❛♣♣❡❞ ✐♥ ❋✐❣✉r❡s ✷✲✹✱ r❡✲ s♣❡❝t✐✈❡❧②✳ ❆ ❝♦♠♣❛r✐s♦♥ ♦❢ t❤❡s❡ str✉❝t✉r❡s ♣♦✐♥ts t♦ t✇♦ r❡❣✉❧❛r✐t✐❡s t♦ ❜❡ ✐♥✈❡st✐❣❛t❡❞ ❢✉rt❤❡r✳ ❋✐rst✱ ♥♦ ♠❛tt❡r ✇❤✐❝❤ ❣r♦✉♣ ✐s ✉s❡❞✱ C1 r❡♠❛✐♥s t♦ ❜❡ t❤❡ ♠♦st ❝r✉❝✐❛❧ s♦✉r❝❡ ♦❢ ✐♥❢♦r♠❛t✐♦♥✳

❙❡❝♦♥❞✱C4s❤♦✇s t❤❡ ❤✐❣❤❡st ✈❛r✐❛❜✐❧✐t② ♦♥ t❤❡ s♣❡❝tr✉♠✿ s✉❜♦r❞✐♥❛t❡ ✐♥ ❋✐❣✉r❡ ✷✱ ✐♥t❡r❛❝t✐✈❡ ✐♥

(15)

❋✐❣✉r❡ ✸ ❛♥❞ ❞♦♠✐♥❛♥t ✐♥ ❋✐❣✉r❡ ✹✳

✺ ❈♦♥❝❧✉❞✐♥❣ r❡♠❛r❦s

❚❤✐s ♣❛♣❡r ✐♥tr♦❞✉❝❡s ❛ ♠❡t❤♦❞ ❢♦r ❝❤❛r❛❝t❡r✐s✐♥❣ t❤❡ str✉❝t✉r❡ ♦❢ ❛ ♠✉❧t✐✲s❡❝t♦r ✐♥❢♦r♠❛t✐♦♥ s②st❡♠ ❛♥❞ ✐❧❧✉str❛t❡s ✐ts ❛♣♣❧✐❝❛t✐♦♥ ✐♥ ❢♦r♠✉❧❛t✐♥❣ t❡st❛❜❧❡ ❤②♣♦t❤❡s❡s ❛♥❞ t❛r❣❡t✐♥❣ ✐♥❢♦r♠❛t✐♦♥ ♣♦❧✐❝② ❢♦r ✐♠♣r♦✈❡❞ s②st❡♠ ♣❡r❢♦r♠❛♥❝❡✳ ❚❤✐s ❝❤❛r❛❝t❡r✐s❛t✐♦♥ ✐s ❛❝❝♦♠♣❧✐s❤❡❞ ❜② ✐❞❡♥t✐❢②✐♥❣ ✐♥❢♦r♠❛t✐♦♥ ❣❛♣s ❛♥❞ ❝❛✉s❡✲❡✛❡❝t ✐♥❢♦r♠❛t✐♦♥ ♣❛t❤✇❛②s ✐♥ t❤❡ s②st❡♠ ❝♦♥❝❡r♥❡❞✳ ❆♥ ❡①♣❡r✐♠❡♥t❛❧ ✇♦r❦s❤♦♣ ❛♥❞ ❛ q✉❡st✐♦♥♥❛✐r❡ ❛r❡ ❞❡s✐❣♥❡❞ t♦ ❣❛t❤❡r ❞❛t❛ ❢♦r t❤❡ ❛♣♣❧✐❝❛t✐♦♥ ♦❢ t❤❡ ♠❡t❤♦❞✳ ❚❤❡ ♠❡t❤♦❞ ❛❧❧♦✇s ♦♥❡ t♦ ❛♥❛❧②③❡ s②st❡♠ ✐♥❢♦r♠❛t✐♦♥ str✉❝t✉r❡ ❛♥❞ ♣❡r❢♦r♠❛♥❝❡ ✐♠♣❧✐❡❞ ❜② q✉❛❧✐t❛t✐✈❡ ❡①♣❡rt ❦♥♦✇❧❡❞❣❡✳

❚❤❡ ♠❡t❤♦❞ ❝❛♥ ❛❧s♦ ❜❡ ❛♣♣❧✐❡❞ ✐♥ t❛r❣❡t✐♥❣ ✐♥❢♦r♠❛t✐♦♥ ♣♦❧✐❝②✳ ❲❤❛t ✐s ♦❜s❡r✈❡❞ ✐s t❤❡ ❡♥t❛♥✲ ❣❧❡❞ ✐♥❢♦r♠❛t✐♦♥ ✢♦✇ ♣❛tt❡r♥s✱ ✇❤✐❝❤ ❛r❡ ♣❛rt❧② ❞❡✈❡❧♦♣❡❞ ❜② ♦♥❡✲t♦✲♦♥❡ ❝♦♠♣♦♥❡♥t ✐♥t❡r❛❝t✐♦♥s ❛♥❞ ♣❛rt❧② ❜② s②st❡♠✲✇✐❞❡ ❡✛♦rts ♦❢ ❛ ❜❡♥❡✈♦❧❡♥t ❜♦❞②✳ ❋♦r t❛r❣❡t✐♥❣ ✐♥❢♦r♠❛t✐♦♥ ♣♦❧✐❝②✱ ♣♦❧✐❝② ♠❛❦❡rs s❤♦✉❧❞ ❤❛✈❡ ❛ ❝❧❡❛r ♠❛♣♣✐♥❣ ♦❢ t❤❡ ❝♦♠♣♦♥❡♥t✲❜❛s❡❞ ✢♦✇ ♣❛tt❡r♥s ❛s ✇❡❧❧ ❛s ❛ ♠❛♣♣✐♥❣ ♦❢ t❤❡ s②st❡♠✲❜❛s❡❞ ✢♦✇ ♣❛tt❡r♥s✳ ❙✉❝❤ ♠❛♣♣✐♥❣s ❝❛♥ ❜❡ ✉s❡❞ t♦ ✐❞❡♥t✐❢② t❤❡ ❛r❡❛s ❝r✐t✐❝❛❧ ❢♦r t❤❡ ✐♥✈❡st♠❡♥t ❛✐♠❡❞ t♦ ❡♥❤❛♥❝❡ t❤❡ s②st❡♠ ♣❡r❢♦r♠❛♥❝❡✳

❚❤❡ ♠❡t❤♦❞ ❤❛s s❡✈❡r❛❧ ✇❡❛❦♥❡ss❡s✱ ❤♦✇❡✈❡r✳ ❚❤❡ ✐♥❢♦r♠❛t✐♦♥ ❝✐r❝✉❧❛t✐♥❣ ✐♥ t❤❡ s②st❡♠ ♠✉st ❜❡ st❛♥❞❛r❞✐s❡❞ ❢♦r ♠❡❛s✉r❡♠❡♥t ❛♥❞ ❝♦♠♣❛r❛❜✐❧✐t② ♦❢ t❤❡ ❡✛❡❝ts ♦❢ ♣❛t❤✇❛②s ✐❞❡♥t✐✜❡❞ ♦♥ t❤❡ s②st❡♠ ❣♦❛❧ ✭s❡❡ ❑❡♥♥❡t❤ ❆rr♦✇ ❬✶❪✮✳ ❚❤❡ ♦r❣❛♥✐s❛t✐♦♥s ✐♥t❡r❛❝t ✇✐t❤ ❡❛❝❤ ♦t❤❡r ❞✉r✐♥❣ t❤❡ ♣r♦❝❡ss ♦❢ t❤❡ ❣❡♥❡r❛t✐♦♥✱ ❡①❝❤❛♥❣❡ ❛♥❞ ✉s❡ ♦❢ ✐♥❢♦r♠❛t✐♦♥✳ ❚❤✐s ✐♥t❡r❛❝t✐♦♥ ❝❛♥ ♦♥❧② ❜❡ q✉❛♥t✐✜❡❞ ✐❢ ✐t ✐s ♠❡❛s✉r❡❞ ❜② ❛ ❝♦♠♠♦♥ ✉♥✐t✳ ❚❤❡ ♠❡t❤♦❞ ❛ss✉♠❡s t❤❛t t❤✐s t❛s❦ ✐s ✉♥❞❡rt❛❦❡♥ ❜② ❛ ❜❡♥❡✈♦❧❡♥t ❞❡❝✐s✐♦♥ ♠❛❦✐♥❣ ❜♦❞② ✇❤♦s❡ ♦♥❧② ❣♦❛❧ ✐s t♦ ✐♠♣r♦✈❡ t❤❡ s②st❡♠ ❣♦❛❧✳✼

❋♦r ❛ ❝♦♠♣❧❡t❡ ✐❞❡♥t✐✜❝❛t✐♦♥ ♦❢ t❤❡ s②st❡♠✱ ❢♦r♠❛❧ ❛♥❞ ✐♥❢♦r♠❛❧ ✐♥❢♦r♠❛t✐♦♥ s❤♦✉❧❞ ❜❡ ❞✐st✐♥✲ ❣✉✐s❤❡❞✳ ❖♥❡ ✇❛② t♦ ❞♦ t❤✐s✱ s✉❣❣❡st❡❞ ❜② ❙t❡✈❡♥ ❲♦❧❢❡✱ ❉❛✈✐❞ ❩✐❧❜❡r♠❛♥✱ ❙t❡✈❡♥ ❲✉ ❛♥❞ ❉❛✈✐❞ ❏✉st ❬✻❪✱ ✐s t♦ ❝❧❛ss✐❢② ✐♥❢♦r♠❛t✐♦♥ ✇✐t❤ r❡s♣❡❝t t♦ t❤❡ ♠❡❞✐✉♠ ♦❢ ❝♦♠♠✉♥✐❝❛t✐♦♥ ❛♥❞ ✐♥t❡♥t✐♦♥s ✉♥❞❡r❧②✐♥❣ t❤❡ ✐♥t❡r❛❝t✐♦♥s✳ ■♥❢♦r♠❛t✐♦♥ ❞❡r✐✈❡❞ ❢r♦♠ t❡①ts✱ ❝♦♥❢❡r❡♥❝❡s✱ ♣❤♦♥❡ ❝❛❧❧s✱ ❡t❝✳✱ ❝❛♥ ❜❡ ❝❧❛ss✐✜❡❞ ❛s ❢♦r♠❛❧✱ ✇❤✐❧❡ ❝♦♥✈❡rs❛t✐♦♥s ❛♥❞ s♦❝✐❛❧ ✐♥t❡r❛❝t✐♦♥s ❛♠♦♥❣ ❢❛♠✐❧②✱ ❢r✐❡♥❞s ❛♥❞ ❜✉s✐✲ ♥❡ss ❛ss♦❝✐❛t❡s ❧✐❦❡ ❝♦❧❧❡❛❣✉❡s✱ ❝✉st♦♠❡rs✱ s✉♣♣❧✐❡rs ❛♥❞ ❝♦♠♣❡t✐t♦rs✱ ❝❛♥ ❜❡ ❝❧❛ss✐✜❡❞ ❛s ✐♥❢♦r♠❛❧ ✐♥❢♦r♠❛t✐♦♥✳

❖♥ t❤❡ ❡♠♣✐r✐❝❛❧ ❛❝❝♦✉♥t✱ t❤❡ ❞❡s✐❣♥ ❛♥❞ ✐♠♣❧❡♠❡♥t❛t✐♦♥ ♦❢ ❛ r❡❛❧ ✇♦r❦s❤♦♣ ✐s ❝r✐t✐❝❛❧✳ ❚❤❡ ❞❡✲ s✐❣♥ s❤♦✉❧❞ t❛❦❡ ✐♥t♦ ❛❝❝♦✉♥t s✉❝❤ ❝❤❛r❛❝t❡r✐st✐❝s ❛s t②♣❡✱ q✉❛❧✐✜❝❛t✐♦♥ ❛♥❞ ♥✉♠❜❡r ♦❢ ♣❛rt✐❝✐♣❛♥ts✳

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❚❤❡ ✐♠♣❧❡♠❡♥t❛t✐♦♥ s❤♦✉❧❞ ♠❛❦❡ s✉r❡ t❤❛t ❝♦♠♣♦s✐t✐♦♥s ♦❢ ❛♥❞ ❞✐s❝✉ss✐♦♥s ✐♥ ✇♦r❦✐♥❣ ❣r♦✉♣s ❛r❡ t✉♥❡❞ ✐♥t♦ t❤❡ ❛❝❤✐❡✈❡♠❡♥t ♦❢ t❤❡ s②st❡♠ ❣♦❛❧✳

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◆♦t❡s

❚❤❡ t❡r♠ ❣❛♣ ✐s ✉s❡❞ t♦ r❡❢❡r t♦ ❛♥ ❛r❡❛ t❤❛t ✇❛rr❛♥ts ❜❡tt❡r ✉♥❞❡rst❛♥❞✐♥❣❀ t❤❡ t❡r♠ ♣❛t❤✇❛②✱ ❛

❝❤❛✐♥ ♦❢ ✐♥t❡r❛❝t✐♦♥s ❜❡t✇❡❡♥ ♦r❣❛♥✐s❛t✐♦♥s❀ ❛♥❞ t❤❡ t❡r♠ ✐♥❢♦r♠❛t✐♦♥ ♣❛t❤✇❛② ✐s ✉s❡❞ t♦ ♠❡❛♥ t❤❛t t❤❡ ❝♦♥t❡♥t ♦❢ t❤❡ ✐♥t❡r❛❝t✐♦♥ ❝♦♥❝❡r♥❡❞ ✐s ✐♥❢♦r♠❛t✐♦♥ ❡①❝❤❛♥❣❡✳

❆ ♠✉❧t✐✲✈♦t✐♥❣ s❝❤❡♠❡ ✐s ❝❛rr✐❡❞ ♦✉t ✐♥ t❤❡ ✇♦r❦s❤♦♣ t♦ ✐❞❡♥t✐❢② t❤❡ ❣❛♣s✱ ♣❛t❤✇❛②s ❛♥❞ ❞❡✈❡❧♦♣

❤②♣♦t❤❡s❡s✳

❚❤❡ t❡r♠s ❈♦♠♣♦♥❡♥ti❛♥❞Ci

❛r❡ ✐♥t❡r❝❤❛♥❣❡❛❜❧② ✉s❡❞ t❤r♦✉❣❤♦✉t t❤❡ ❝❤❛♣t❡r✳

■r✐♥✐ ❚❤❡♦❞♦r❛❦♦✉♣♦✉❧♦✉ ❛♥❞ ◆✐❝❤♦❧❛s ❑❛❧❛✐t③❛♥❞♦♥❛❦❡s ❬✺❪ ✐♥tr♦❞✉❝❡s ❛ s✐♠✐❧❛r ♠♦❞❡❧✱ ❡①❝❡♣t t❤❛t ♦✉r

♠♦❞❡❧ ♦❢ ✐♥❢♦r♠❛t✐♦♥ ♠❛♥❛❣❡♠❡♥t ❛❞❞✐t✐♦♥❛❧❧② ❝♦♥s✐❞❡rs t❤❡ s②st❡♠ ❝❤❛r❛❝t❡r✐st✐❝s✱ ✇❤✐❝❤ ❛r❡ ❡①♦❣❡♥♦✉s t♦ ✐♥❞✐✈✐❞✉❛❧ ♦r❣❛♥✐s❛t✐♦♥s✳

❙❡❡ ❑❛③✉♦ ▼✉r♦t❛ ❬✹❪ ❢♦r st✉❞②✐♥❣ t❤❡ ❢❡❛t✉r❡s ♦❢ s②st❡♠s✳

❚❤❛♥❦s t♦ ❘✐❝❦ ❉❛✈✐❡s ❢♦r ✐♥❞✐❝❛t✐♥❣ t❤❡ ✉s❡❢✉❧♥❡ss ♦❢ s✉❝❤ ✜❣✉r❡s ✭♣❡rs♦♥❛❧ ❝♦♠♠✉♥✐❝❛t✐♦♥s✮✳ ❚❤❡

r❡❛❞❡r ✐s ❛❧s♦ r❡❢❡rr❡❞ t♦ ▲✐♥t♦♥ ❋r❡❡♠❛♥ ❬✷❪ ❢♦r ✈✐s✉❛❧ ❣r❛♣❤✲t❤❡♦r❡t✐❝ ♠❡t❤♦❞s✳

❚❤❡ r❡❛❞❡r ✐s ❛❧s♦ r❡❢❡rr❡❞ t♦ t❤❡ ♣✉❜❧✐❝ ❡❝♦♥♦♠✐❝s ❧✐t❡r❛t✉r❡ ❢♦r ❢✉rt❤❡r r❡❛❞✐♥❣ ♦♥ t❤❡ ✈❛❧✉❡ ♦❢ ♣✉❜❧✐❝

❣♦♦❞s✳

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❘❡❢❡r❡♥❝❡s

❬✶❪ ❆rr♦✇✱ ❑❡♥♥❡t❤ ❏✳ ✭✶✾✽✻✮✳ ❚❤❡ ✈❛❧✉❡ ♦❢ ❛♥❞ ❞❡♠❛♥❞ ❢♦r ✐♥❢♦r♠❛t✐♦♥✬✱ ✐♥ ❈✳❇✳ ▼❝●✉✐r❡ ❛♥❞ ❘✳ ❘❛❞♥❡r ✭❊❞s✮ ❉❡❝✐s✐♦♥ ❛♥❞ ❖r❣❛♥✐③❛t✐♦♥✱ ✷♥❞ ❡❞♥✱ ▼■✱ ❯❙❆✿ ❯♥✐✈❡rs✐t② ♦❢ ▼✐♥♥❡s♦t❛ Pr❡ss✳

❬✷❪ ❋r❡❡♠❛♥✱ ▲✐♥t♦♥ ❈✳ ✭✷✵✵✵✮✳ ❯s✐♥❣ ❛✈❛✐❧❛❜❧❡ ❣r❛♣❤ t❤❡♦r❡t✐❝ ♦r ♠♦❧❡❝✉❧❛r ♠♦❞❡❧✐♥❣ ♣r♦❣r❛♠s ✐♥ s♦❝✐❛❧ ♥❡t✇♦r❦ ❛♥❛❧②s✐s✳ ❆✈❛✐❧❛❜❧❡ ❢r♦♠✿ ❤tt♣✿✴✴t❛rs❦✐✳ss✳✉❝✐✳❡❞✉✴♥❡✇✳❤t♠❧

❬✸❪ ❍✉❞s♦♥✱ ❏♦❤♥ ❆✳ ✭✶✾✾✷✮✳ ❘♦❝❦ ❊♥❣✐♥❡❡r✐♥❣ ❙②st❡♠s✿ ❚❤❡♦r② ❛♥❞ Pr❛❝t✐❝❡✱ ▲♦♥❞♦♥✱ ❯❑✿ ❊❧❧✐s ❍♦r✇♦♦❞ ▲✐♠✐t❡❞✳

❬✹❪ ▼✉r♦t❛✱ ❑❛③✉♦ ✭✶✾✽✼✮✳ ❙②st❡♠s ❆♥❛❧②s✐s ❜② ●r❛♣❤s ❛♥❞ ▼❛tr♦✐❞s✿ ❙tr✉❝t✉r❛❧ ❙♦❧✈❛❜✐❧✐t② ❛♥❞ ❈♦♥tr♦❧❛❜✐❧✐t②✱ ❇❡r❧✐♥✿ ❙♣r✐♥❣❡r✲❱❡r❧❛❣✳

❬✺❪ ❚❤❡♦❞♦r❛❦♦✉♣♦✉❧♦✉✱ ■r✐♥✐✱ ❛♥❞ ◆✐❝❤♦❧❛s ❑❛❧❛✐t③♦♥❞♦♥❛❦❡s ✭✶✾✾✾✮✳ ❙tr✉❝t✉r❡ ❛♥❞ ♣❡r❢♦r♠❛♥❝❡ ♦❢ ♣r✐✈❛t❡✲♣✉❜❧✐❝ ❦♥♦✇❧❡❞❣❡ ♥❡t✇♦r❦s ✐♥ ♣❧❛♥t ❜✐♦t❡❝❤♥♦❧♦❣②✳✑ ■♥ ❙✳ ❲♦❧❢❡ ❛♥❞ ❉✳ ❩✐❧❜❡r♠❛♥ ✭❡❞s✮ ❑♥♦✇❧❡❞❣❡ ●❡♥❡r❛t✐♦♥ ❛♥❞ ❚❡❝❤♥✐❝❛❧ ❈❤❛♥❣❡✿ ■♥st✐t✉t✐♦♥❛❧ ■♥♥♦✈❛t✐♦♥ ✐♥ ❆❣r✐❝✉❧t✉r❡✳ ◆❡✇ ❨♦r❦✿ ❑❧✉✇❡r✲P❧❡♥✉♠ ❆❝❛❞❡♠✐❝ P✉❜❧✐s❤❡rs✳

❬✻❪ ❲♦❧❢❡✱ ❙t❡✈❡♥ ❆✳✱ ❉❛✈✐❞ ❩✐❧❜❡r♠❛♥✱ ❙t❡✈❡♥ ❲✉✱ ❛♥❞ ❉❛✈✐❞ ❘✳ ❏✉st ✭✷✵✵✶✮✳ ■♥st✐t✉t✐♦♥❛❧ r❡❧❛t✐♦♥s ✐♥ ❛❣r✐❝✉❧t✉r❛❧ ✐♥❢♦r♠❛t✐♦♥ s②st❡♠s✳ ■♥ ❙✳ ❲♦❧❢❡ ❛♥❞ ❉✳ ❩✐❧❜❡r♠❛♥ ✭❊❞s✮ ❑♥♦✇❧❡❞❣❡ ●❡♥❡r❛t✐♦♥ ❛♥❞ ❚❡❝❤♥✐❝❛❧ ❈❤❛♥❣❡✿ ■♥st✐t✉t✐♦♥❛❧ ■♥♥♦✈❛t✐♦♥ ✐♥ ❆❣r✐❝✉❧t✉r❡✱ ❇♦st♦♥✱ ▼❆✿ ❑❧✉✇❡r ❆❝❛❞❡♠✐❝ P✉❜❧✐s❤❡rs✳

(19)

❋✐❣✉r❡ ✶✿ ▼❛♣ ♦❢ ❞✐r❡❝t❡❞ ✭❝❛✉s❛❧✮ r❡❧❛t✐♦♥s ✐♥S5,total

❋✐❣✉r❡ ✷✿ ▼❛♣ ♦❢ ❞✐r❡❝t❡❞ ✭❝❛✉s❛❧✮ r❡❧❛t✐♦♥s ✐♥S5,strong

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