Aiwatar da gwaje-gwajen dawo da spiked da lissafin adadin dawowa

Gwajin farfadowa wani nau'i ne na "gwajin sarrafawa".Lokacin da abubuwan da ke cikin samfurin da aka bincika sun kasance masu rikitarwa kuma ba a bayyana su gaba ɗaya ba, ana ƙara adadin da aka sani na abin da aka auna a cikin samfurin, sa'an nan kuma auna don duba ko za'a iya dawo da abin da aka ƙara da yawa don sanin ko akwai kuskuren tsari a cikin samfurin. tsarin bincike.Sakamakon da aka samu galibi ana bayyana shi azaman kashi, ana kiransa "farfadowa kashi dari", ko "farfadowa" a takaice.Gwajin dawo da spiked hanya ce ta gwaji gama gari a cikin binciken sinadarai, kuma shine mahimmin kayan sarrafa inganci.Farfadowa alama ce ta ƙididdigewa don tantance daidaiton sakamakon bincike.

Maidowa spiked shine rabon abun ciki (ƙimar aunawa) zuwa ƙimar da aka ƙara lokacin da aka ƙara ma'auni tare da sanannen abun ciki (abin da aka auna) zuwa samfurin mara komai ko wani bango tare da sanannen abun ciki kuma aka gano ta hanyar kafaffen hanya.

Maido da spiked = (ƙimar da aka auna samfurin spiked - ƙimar ƙima) ÷ adadin spiked × 100%

Idan ƙarar darajar ita ce 100, ƙimar da aka auna ita ce 85, sakamakon shine adadin dawo da 85%, wanda aka sani da farfadowar spiked.

Farfadowa sun haɗa da cikakkiyar farfadowa da farfadowa na dangi.Cikakken farfadowa yana nazarin yawan adadin samfurin da za a iya amfani dashi don bincike bayan aiki.Wannan saboda akwai asarar samfurin bayan sarrafawa.A matsayin hanyar nazari, ana buƙatar cikakkiyar farfadowa gabaɗaya ya zama sama da 50% don karɓuwa.Rabon abun da aka auna wanda aka ƙara da yawa zuwa matrix mara kyau, bayan jiyya, zuwa ma'auni.Ma'auni yana diluted kai tsaye, ba samfurin iri ɗaya da jiyya ɗaya ba.Idan iri ɗaya ne, kawai kada ku ƙara matrix don magancewa, za'a iya samun abubuwa masu yawa masu tasiri waɗanda ke kare wannan, sabili da haka rasa ainihin manufar jarrabawar cikakkiyar farfadowa.

Akwai nau'ikan dawo da dangi guda biyu da gaske.Ɗayan shine hanyar gwajin dawo da ɗayan kuma ita ce hanyar gwajin dawo da samfurin spiked.Na farko shine ƙara kayan da aka auna a cikin matrix blank, madaidaicin madaidaicin ma daidai yake, irin wannan ƙaddarar ana amfani da shi fiye da haka, amma akwai tuhuma cewa an ƙayyade ma'auni akai-akai.Na biyu shine ƙara kayan da aka auna a cikin samfurin da aka sani na maida hankali don kwatanta da daidaitaccen lanƙwasa, wanda kuma aka ƙara a cikin matrix.Ana bincika dawo da dangi akan daidaito.