K i n   = ∑ k = 1  N m e t h     w k  log ⁡  10   ( f t r  k  ( R i n  k  )  f r a n d  k  ( R i n  k  )    )          ( 4 )    MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaacqWGlbWsdaWgaaWcbaGaemyAaKMaemOBa4gabeaakiabg2da9maaqahabaGaem4DaC3aaSbaaSqaaiabdUgaRbqabaGccyGGSbaBcqGGVbWBcqGGNbWzdaWgaaWcbaGaeGymaeJaeGimaadabeaakmaabmaabaWaaSaaaeaacqWGMbGzdaqhaaWcbaGaemiDaqNaemOCaihabaGaem4AaSgaaOGaeiikaGIaemOuai1aa0baaSqaaiabdMgaPjabd6gaUbqaaiabdUgaRbaakiabcMcaPaqaaiabdAgaMnaaDaaaleaacqWGYbGCcqWGHbqycqWGUbGBcqWGKbazaeaacqWGRbWAaaGccqGGOaakcqWGsbGudaqhaaWcbaGaemyAaKMaemOBa4gabaGaem4AaSgaaOGaeiykaKcaaaGaayjkaiaawMcaaaWcbaGaem4AaSMaeyypa0JaeGymaedabaGaemOta40aaSbaaWqaaiabd2gaTjabdwgaLjabdsha0jabdIgaObqabaaaniabggHiLdGccaWLjaGaaCzcamaabmaabaGaeGinaqdacaGLOaGaayzkaaaaaa@6960@