# Άσκηση1 ( Vector Space )

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19-Mar-2016

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1 ( Vector Space ). :. Documents D1 = Shipment of gold damaged in a fire D2 = Delivery of silver arrived in a silver truck D3 = Shipment of gold arrived in a truck. Query:. Q = gold silver truck. Ranking ?. - PowerPoint PPT Presentation

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• 1 (Vector Space )Q = gold silver truckDocuments

D1 = Shipment of gold damaged in a fireD2 = Delivery of silver arrived in a silver truckD3 = Shipment of gold arrived in a truck : Query:Ranking?

• Q = gold silver truckDocuments

D1 = Shipment of gold damaged in a fireD2 = Delivery of silver arrived in a silver truckD3 = Shipment of gold arrived in a truckTerms 1 2 3 4 5 6 7 8 9 10 11 shipment/ of/ gold /damaged /in /a /fire /delivery /silver /arrived / truck

• Terms 1 2 3 4 5 6 7 8 9 10 11 shipment/ of/ gold /damaged /in /a /fire /delivery /silver /arrived / truck

TermQD1D2D3 niN/niidfiWi,qWi,D1Wi,D2Wi,D31010121,50,176100,176100,1761

2011131000003110121,50,17610,17610,176100,1761

40100130,477100,47710050111310000060111310000070100130,477100,47710080010130,4771000,4771091020130,47710,477100,9542010001121,50,1761000,17610,176111101121,50,17610,176100,17610,1761

• Rankingdoc 2doc 3doc 1

• 2 ( IF)) IF 75% IP1 40% .) IF 50% IP2 80% . 5000 queries/sec. IF 4 . IF 1000 queries/sec. ;

• 1 2Ip1A)

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• 1 2Ip2B)17 14