S N  ≃ − log ⁡  10   F +  ( E ) −   t  ( N − E ) ∇ F +  ( E )  ln ⁡ ( 10 ) F +  ( E )         ( 9 )    MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaacqWGtbWudaWgaaWcbaacbeGae8Nta4eabeaakiabloKi7iabgkHiTiGbcYgaSjabc+gaVjabcEgaNnaaBaaaleaacqaIXaqmcqaIWaamaeqaaOGaemOray0aaWbaaSqabeaacqGHRaWkaaGccqGGOaakcqWFfbqrcqGGPaqkcqGHsisldaWcaaqaaiabbccaGmaaCaaaleqabaGaemiDaqhaaOGaeiikaGIae8Nta4KaeyOeI0Iae8xrauKaeiykaKIaey4bIeTaemOray0aaWbaaSqabeaacqGHRaWkaaGccqGGOaakcqWFfbqrcqGGPaqkaeaacyGGSbaBcqGGUbGBcqGGOaakcqaIXaqmcqaIWaamcqGGPaqkcqWGgbGrdaahaaWcbeqaaiabgUcaRaaakiabcIcaOiab=veafjabcMcaPaaacaWLjaGaaCzcamaabmaabaGaeGyoaKdacaGLOaGaayzkaaaaaa@5A3D@